SANDIA NATIONAL LABORATORIES

Albuquerque, New Mexico

SPECIFICATION 16464 (SE-US-83-2)

SPECIFICATIONS FOR POWER TRANSFORMER

SUBSTATION 37

Project: 1391-89-A l0

5/1/91

115/12.47kV 12/16/20MVA Transformer

1.0 SCOPE

These specifications cover one (1) unit substation to be furnished complete, as specified herein and as

shown on the attached drawings in Appendix 4. This unit substation will be installed to transform power

from the Purchaser's effectively grounded 115 kV transmission system to its effectively grounded 13.8 kV

distribution system.

2.0 SERVICE CONDITIONS

This unit will be rated for installation at an elevation of 5,000 feet above sea level. The ambient

temperature will range from minus 20"F to plus 110"F. All parts and equipment shall be capable of

operation under severe wind and dust conditions. All equipment shall be fully rated, as specified for the

above altitude. All equipment shall be dust proof.

This unit's bushings, circuit breakers, and all accessories shall be capable of withstanding the maximum

seismic forces to be encountered in a 35-year period in a Zone 2 earthquake area.

3.0 STANDARDS

This unit shall be designed, tested, and assembled by a single Seller, in accordance with the latest

applicable IEEE, NEMA, IPCEA, ANSI, and OSHA standards, and as detailed in this specification. The

Seller shall notify the Purchaser of any changes in code or standards affecting this equipment. Code or

standards changes after fabrication shall be reviewed by Purchaser for impact on equipment. In the event of

conflicts between the standards and/or the specifications, the most stringent shall take precedence.

4.0 NEW MATERIAL

Seller shall provide new (not used or recognition and not of such age or so deteriorated as to impair their

usefulness or safety) materials and components. If at any time Seller believes that furnishing of materials or

components which are not new is necessary or desirable, he shall notify Purchaser immediately, in writing,

including reasons therefor and proposing the consideration which will flow to Purchaser if authorization to

use such materials or components is granted.

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 EE-RM/STD-00-550 COMMENT 86

1.0 SCOPE 

SANDIA NATIONAL LABORATORIES 

Albuquerque, New Mexico 

SPECIFICATION 16464 (SE-US-83-2) 

SPECIFICATIONS FOR POWER TRANSFORMER 

SUBSTATION 37 

Project: 1391-89-AlO 

5/1/91 

115112.47kV 12/16120MV A Transformer 

These specifications cover one (1) unit substation to be furnished complete, as specified herein and as 

shown on the attached drawings in Appendix 4. This unit substation will be installed to transform power 

from the Purchaser's effectively grounded 115 kV transmission system to its effectively grounded 13.8 kV 

distribution system. 

2.0 SERVICE CONDITIONS 

This unit will be rated for installation at an elevation of 5,000 feet above sea level. The ambient 

temperature will range from minus 20"F to plus 11O"F. All parts and equipment shall be capable of 

operation under severe wind and dust conditions. All equipment shall be fully rated, as specified for the 

above altitude. All equipment shall be dust proof. 

This unit's bushings, circuit breakers, and all accessories shall be capable of withstanding the maximum 

seismic forces to be encountered in a 35-year period in a Zone 2 earthquake area. 

3.0 STANDARDS 

This unit shall be designed, tested, and assembled by a single Seller, in accordance with the latest 

applicable IEEE, NEMA, IPCEA, ANSI, and OSHA standards, and as detailed in this specification. The 

Seller shall notify the Purchaser of any changes in code or standards affecting this equipment. Code or 

standards changes after fabrication shall be reviewed by Purchaser for impact on equipment. In the event of 

conflicts between the standards and/or the specifications, the most stringent shall take precedence. 

4.0 NEW MATERIAL 

Seller shall provide new (not used or recognition and not of such age or so deteriorated as to impair their 

usefulness or safety) materials and components. If at any time Seller believes that furnishing of materials or 

components which are not new is necessary or desirable, he shall notify Purchaser immediately, in writing, 

including reasons therefor and proposing the consideration which will flow to Purchaser if authorization to 

use such materials or components is granted. 

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5.0 INSPECTION

All materials and components shall be subject to inspection and test by Purchaser, to the extent practicable

at all times and places, including the period of manufacture, and in any event prior to acceptance.

If any inspection and test is made by Purchaser on the premises of Seller or a subcontractor, Seller, without

additional charge shall make available to Purchaser's inspectors all reasonable facilities and assistance,

including drawings, specifications, certifications, and other related data. If any such data is proprietary,

Purchaser agrees to comply with reasonable procedures for safeguarding such data. If Purchaser inspection

or test is made at a point other than the premises of Seller or a subcontractor, it shall be at the expense of

Purchaser except as otherwise provided in this specification.

The inspection and test by Purchaser shall not relieve the Seller of any responsibility regarding defects or

other failures to meet the requirements of this specification.

6.0 REJECTED MATERIAL

During manufacture, if any material or components are defective in material, workmanship, or otherwise

not in conformity with the requirements of this specification, Purchaser shall have the right to either reject

them or to require their correction at Seller's expense.

Upon or after delivery, if material received is rejected for defects which are Seller's responsibility, Seller

shall have the option of having material returned or corrected at Purchaser's facility. If Seller elects to have

the defective material returned, he will be responsible for Purchaser's handling, packaging, shipping, and

administrative costs. If material is to be corrected, Seller must promptly do so or Purchaser may contract,

replace, or otherwise correct material and charge to Seller his costs.

7.0 FINISH

7.1 Surface Preparation

Prior to painting, all steel surfaces shall be cleaned in accordance with the appropriate standards or the

coating Seller's recommendations. The blast cleaning should be inspected and approved in accordance with

the "Visual Pictorial Guide SSPC-VIS-1-67T," and a profile comparator.

7.2 Painting

The Seller shall recommend a paint system which will conform to "A Guide to the Shop Painting of

Structural Steel" published by the AISC and the Steel Structures Painting Council (SSPC).

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 EE-RM/STD-00-550 COMMENT 86

5.0 INSPECTION 

All materials and components shall be subject to inspection and test by Purchaser, to the extent practicable 

at all times and places, including the period of manufacture, and in any event prior to acceptance. 

If any inspection and test is made by Purchaser on the premises of Seller or a subcontractor, Seller, without 

additional charge shall make available to Purchaser's inspectors all reasonable facilities and assistance, 

including drawings, specifications, certifications, and other related data. If any such data is proprietary, 

Purchaser agrees to comply with reasonable procedures for safeguarding such data. If Purchaser inspection 

or test is made at a point other than the premises of Seller or a subcontractor, it shall be at the expense of 

Purchaser except as otherwise provided in this specification. 

The inspection and test by Purchaser shall not relieve the Seller of any responsibility regarding defects or 

other failures to meet the requirements of this specification. 

6.0 REJECTED MATERIAL 

During manufacture, if any material or components are defective in material, workmanship, or otherwise 

not in conformity with the requirements of this specification, Purchaser shall have the right to either reject 

them or to require their correction at Seller's expense. 

Upon or after delivery, if material received is rejected for defects which are Seller's responsibility, Seller 

shall have the option of having material returned or corrected at Purchaser's facility. If Seller elects to have 

the defective material returned, he will be responsible for Purchaser's handling, packaging, shipping, and 

administrative costs. If material is to be corrected, Seller must promptly do so or Purchaser may contract, 

replace, or otherwise correct material and charge to Seller his costs. 

7.0 FINISH 

7.1 Surface Preparation 

Prior to painting, all steel surfaces shall be cleaned in accordance with the appropriate standards or the 

coating Seller's recommendations. The blast cleaning should be inspected and approved in accordance with 

the "Visual Pictorial Guide SSPC-VIS-1-67T," and a profile comparator. 

7.2 Painting 

The Seller shall recommend a paint system which will conform to "A Guide to the Shop Painting of 

Structural Steel" published by the AISC and the Steel Structures Painting Council (SSPC). 

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The Seller shall guarantee the adhesion of this system to the structure for a minimum period of five years

from date of shipment. Liability shall be for all materials, equipment, and field labor to repaint structure in

the deenergized condition.

Before painting, all welds shall be sandblasted to remove flux residues and all surfaces cleaned per SSPCSP6 or the paint manufacturer's recommendations.

All structures that are to be painted shall be hermetically sealed.

Paint thickness shall be per SSPC-PAI or the paint manufacturer's recommendations.

The Seller shall utilize detailed application and inspection procedures to assure coating integrity. All

painters shall be qualified.

The Seller's paint system must be easily adaptable to field touch-up by either spray, brush, or roller after the

damaged area has been thoroughly cleaned and solvent wiped. Sufficient paint shall be provided for field

touch-up.

The paint system shall consist of a primer coat, with the second and final coats of ANSI-70, or an approved

equivalent in substance, quality, and color.

The interior of the transformer tank shall be painted ANSI-70 or white.

The interior of the switchgear (i.e., Sheltered Aisle) shall be painted the same color as the exterior of the

switchgear.

8.0 DATA TO BE FURNISHED BY ALL BIDDERS

Bidder shall submit with his proposal the following:

Unit price.

DC power requirements (if any).

Itemized list of all standards to be used in the bids.

Typical drawings showing approximate shipping and final dimensions, weights, etc.

Typical instruction book with appropriate drawings explaining receiving, handling, and assembly of unit,

especially with the following details:

List of transformer and/or switchgear accessories that are freestanding requiring separate foundations.

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 EE-RM/STD-00-550 COMMENT 86

The Seller shall guarantee the adhesion of this system to the structure for a minimum period of five years 

from date of shipment. Liability shall be for all materials, equipment, and field labor to repaint structure in 

the deenergized condition. 

Before painting, all welds shall be sandblasted to remove flux residues and all surfaces cleaned per SSPCSP6 or the paint manufacturer's recommendations. 

All structures that are to be painted shall be hermetically sealed. 

Paint thickness shall be per SSPC-PAI or the paint manufacturer's recommendations. 

The Seller shall utilize detailed application and inspection procedures to assure coating integrity. All 

painters shall be qualified. 

The Seller's paint system must be easily adaptable to field touch-up by either spray, brush, or roller after the 

damaged area has been thoroughly cleaned and solvent wiped. Sufficient paint shall be provided for field 

touch-up. 

The paint system shall consist of a primer coat, with the second and final coats of ANSI-70, or an approved 

equivalent in substance, quality, and color. 

The interior of the transformer tank shall be painted ANSI-70 or white. 

The interior of the switchgear (i.e., Sheltered Aisle) shall be painted the same color as the exterior of the 

switchgear. 

8.0 DATA TO BE FURNISHED BY ALL BIDDERS 

Bidder shall submit with his proposal the following: 

Unit price. 

DC power requirements (if any). 

Itemized list of all standards to be used in the bids. 

Typical drawings showing approximate shipping and final dimensions, weights, etc. 

Typical instruction book with appropriate drawings explaining receiving, handling, and assembly of unit, 

especially with the following details: 

List of transformer and/or switchgear accessories that are freestanding requiring separate foundations. 

- 3 -
List of items assembled and shipped in place with the transformer and/or switchgear.

List of all items to be assembled in the field.

Estimate of total man-hours required to assemble entire unit.

Added cost for all available extended warranties.

Added cost for unenergized warranty and the length of time this warranty will be in effect.

An outline of the transformer and switchgear configuration (giving overall dimensions).

An alternate bid on the transformer alone.

An alternate bid on the switchgear alone.

8.1 Installation

Services of Seller's field engineer shall be furnished to oversee assembly and testing of transformer and/or

switchgear. The cost of this service shall be included in the substation price quoted. List the cost per day

and the number of days included separately.

8.2 Schedule Of Shipment

Quote best delivery and maximum possible delay which might be encountered.

Bidder shall state method of shipping as part of bid. If possible, unit shall be shipped by truck.

8.3 Exceptions to the Specification

It is the responsibility of the Bidder to clearly state all exceptions to this specification. All exceptions shall

be listed in a separate section of the Bidder's proposal labeled "Exceptions To The Specification." Failure

to list any and all exceptions may result in rejection of the bid.

8.4 Data Furnished By Transformer Bidders

The charge for performing ANSI-C57.12.90A short-circuit test. Seller will be notified thirty (30) days prior

to shipment of transformer if it is to be short-circuit tested. The Purchaser reserves the right to specify the

location for this testing. The Seller will be notified of the location at the time of notification of intent to

test.

In the event of transformer failing the short-circuit test, the Seller shall correct all defects and retest at his

expense. Retesting shall be at testing facility specified by Purchaser. Should the unit fail the retest, the

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 EE-RM/STD-00-550 COMMENT 86

List of items assembled and shipped in place with the transformer and/or switchgear. 

List of all items to be assembled in the field. 

Estimate of total man-hours required to assemble entire unit. 

Added cost for all available extended warranties. 

Added cost for unenergized warranty and the length of time this warranty will be in effect. 

An outline of the transformer and switchgear configuration (giving overall dimensions). 

An alternate bid on the transformer alone. 

An alternate bid on the switchgear alone. 

8.1 Installation 

Services of Seller's field engineer shall be furnished to oversee assembly and testing of transformer and/or 

switchgear. The cost of this service shall be included in the substation price quoted. List the cost per day 

and the number of days included separately. 

8.2 Schedule Of Shipment 

Quote best delivery and maximum possible delay which might be encountered. 

Bidder shall state method of shipping as part of bid. If possible, unit shall be shipped by truck. 

8.3 Exceptions to the Specification 

It is the responsibility of the Bidder to clearly state all exceptions to this specification. All exceptions shall 

be listed in a separate section of the Bidder's proposal labeled "Exceptions To The Specification." Failure 

to list any and all exceptions may result in rejection of the bid. 

8.4 Data Furnished By Transformer Bidders 

The charge for performing ANSI-C57 .12.90A short-circuit test. Seller will be notified thirty (30) days prior 

to shipment of transformer if it is to be short-circuit tested. The Purchaser reserves the right to specify the 

location for this testing. The Seller will be notified of the location at the time of notification of intent to 

test. 

In the event of transformer failing the short-circuit test, the Seller shall correct all defects and retest at his 

expense. Retesting shall be at testing facility specified by Purchaser. Should the unit fail the retest, the 

- 4-
Purchaser reserves the right to reject the unit. It is the manufacturer's responsibility to notify Purchaser

forty-five (45) days prior to shipment date. Failure to notify the Purchaser of the shipment date at the 45-

day limit may result in cancellation of the purchase order.

The Bidder shall submit a performance specification form with the bid. This form shall comply with ANSIC57.1200-1973, Appendix, page F-11. All loss data shall be supplied for the MVA specified in the loss

evaluation section of this specification. Failure to complete this form will result in rejection of the bid.

Added cost for performing a dissolved gas analysis on the transformer oil before and immediately after the

following tests:

Impulse tests

Insulated power factor tests

Switching surge tests

Corona test

Excitation tests

Price deduction for omitting high voltage lightning arresters. Mounting provisions shall be included in the

quote.

Whether or not transformer will require field installation of the main tank cover.

Bushing outline.

LTC type and manufacturer of LTC.

Bidder shall furnish alternate price for a vacuum LTC.

Bidder shall fill out the transformer bid data sheet in Appendix 1.

8.5 Data Furnished by Switchgear Bidders

Bidder shall indicate whether or not the protected aisle will be shipped assembled and, if not, the additional

cost for factory assembly.

The guaranteed short-circuit current rating in kiloamperes for the 13.8 kV circuit breakers at 13.8 kV.

These short circuit currents shall be defined as the maximum symmetrical interrupting capability in

kiloamperes.

 EE-RM/STD-00-550 COMMENT 86

Purchaser reserves the right to reject the unit. It is the manufacturer's responsibility to notify Purchaser 

forty-five (45) days prior to shipment date. Failure to notify the Purchaser of the shipment date at the 45-

day limit may result in cancellation of the purchase order. 

The Bidder shall submit a performance specification form with the bid. This form shall comply with ANSIC57 .1200-1973, Appendix, page F-11. All loss data shall be supplied for the MV A specified in the loss 

evaluation section of this specification. Failure to complete this form will result in rejection of the bid. 

Added cost for performing a dissolved gas analysis on the transformer oil before and immediately after the 

following tests: 

Impulse tests 

Insulated power factor tests 

Switching surge tests 

Corona test 

Excitation tests 

Price deduction for omitting high voltage lightning arresters. Mounting provisions shall be included in the 

quote. 

Whether or not transformer will require field installation of the main tank cover. 

Bushing outline. 

LTC type and manufacturer of LTC. 

Bidder shall furnish alternate price for a vacuum LTC. 

Bidder shall fill out the transformer bid data sheet in Appendix 1. 

8.5 Data Furnished by Switchgear Bidders 

Bidder shall indicate whether or not the protected aisle will be shipped assembled and, if not, the additional 

cost for factory assembly. 

The guaranteed short-circuit current rating in kiloamperes for the 13.8 kV circuit breakers at 13.8 kV. 

These short circuit currents shall be defined as the maximum symmetrical interrupting capability in 

kiloamperes. 

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Bidder shall define type of circuit breaker included with bid.

If roll-out type load break disconnect tie switches can be provided, quote on providing two (2) and the

associated reduction in price if one only is ordered.

Bidder shall furnish saturation curves for all CTs.

Bidder shall fill out the switchgear bid data sheet in Appendix 2.

8.6 Data to be Furnished by Seller

8.6.1 Drawings

After receiving order, Seller shall submit to Purchaser's engineer, as soon as practicable, four sets of

drawings, wiring diagrams, and associated data for approval. Drawings shall include a three-line

elementary of all equipment on a one-to- one correlation without reference to typicals.

After review of the above approval drawings, Public Service Company of New Mexico (PNM) will return

one (1) copy of each drawing marked either "reviewed and accepted" or "reviewed and accepted as noted."

At least 120 days prior to scheduled delivery of transformer and/or switchgear, Seller shall submit to

Purchaser's engineer the following data:

Six sets of certified drawings showing information necessary for foundation design, outline

dimensions, wiring diagrams, etc.

Six complete sets of operating instructions.

Six complete sets of sectional views of equipment with parts numbered or labeled to facilitate ordering

replacement parts.

Six complete sets of sectional views of bushings with parts numbered or labeled to facilitate ordering

replacement parts.

Six sets of characteristics and ratio correction curves for bushing current transformers.

Six copies of recommended spare parts list.

Six copies of the completed nameplates (i.e., impedance, serial numbers, etc.) for each current

transformer, potential transformer, and the power transformer.

Prior to shipment, the Seller shall furnish one complete set of all drawings on reproducible mylar sepias and

aperture cards for each item purchased, and six copies of the completely filled in final nameplate. Each of

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 EE-RM/STD-00-550 COMMENT 86

Bidder shall define type of circuit breaker included with bid. 

If roll-out type load break disconnect tie switches can be provided, quote on providing two (2) and the 

associated reduction in price if one only is ordered. 

Bidder shall furnish saturation curves for all CTs. 

Bidder shall fill out the switchgear bid data sheet in Appendix 2. 

8.6 Data to be Furnished by Seller 

8.6.1 Drawings 

After receiving order, Seller shall submit to Purchaser's engineer, as soon as practicable, four sets of 

drawings, wiring diagrams, and associated data for approval. Drawings shall include a three-line 

elementary of all equipment on a one-to- one correlation without reference to typicals. 

After review of the above approval drawings, Public Service Company of New Mexico (PNM) will return 

one (1) copy of each drawing marked either "reviewed and accepted" or "reviewed and accepted as noted." 

At least 120 days prior to scheduled delivery of transformer and/or switchgear, Seller shall submit to 

Purchaser's engineer the following data: 

Six sets of certified drawings showing information necessary for foundation design, outline 

dimensions, wiring diagrams, etc. 

Six complete sets of operating instructions. 

Six complete sets of sectional views of equipment with parts numbered or labeled to facilitate ordering 

replacement parts. 

Six complete sets of sectional views of bushings with parts numbered or labeled to facilitate ordering 

replacement parts. 

Six sets of characteristics and ratio correction curves for bushing current transformers. 

Six copies of recommended spare parts list. 

Six copies of the completed nameplates (i.e., impedance, serial numbers, etc.) for each current 

transformer, potential transformer, and the power transformer. 

Prior to shipment, the Seller shall furnish one complete set of all drawings on reproducible mylar sepias and 

aperture cards for each item purchased, and six copies of the completely filled in final nameplate. Each of 

- 6 -
the sepias and aperture cards shall be marked in permanent print with the purchaser's purchase order,

destination of equipment, Seller's requisition number, Seller's factory number, Seller's shop order number,

and date. A sepia of each of the completed nameplates shall also be furnished.

All of the above documents shall be sent to:

Robert L. Perlichek

Substation Engineer

Public Service Company of New Mexico

Alvarado Square

Albuquerque, NM 87158

As soon as test data is available, six certified copies of this information will be furnished.

8.6.2 Shipment

The transformer, switchgear, and transformer oil shall be shipped f.o.b. destination with freight prepaid and

allowed, to a location specified on the Purchase Order.

The transformer shall be filled with certified dry breathing air for shipping, if shipped by rail. Transformer

can be shipped oil filled if shipped by truck.

Transformer insulating oil shall be shipped by tank truck to the site specified by the Purchaser, if

transformer is shipped by rail.

Demurrage charges, if applicable, must be fully described as to costs, the free time period in days or months

at which point costs would commence, and the site where the free time period would commence. The

Seller must furnish documentation satisfactory to PNM, substantiating any demurrage charges incurred,

prior to the payment of such charges.

Two impact recorders shall be provided: one on the rail car or truck bed and one on the main tank.

Purchaser's personnel will remove recorders, review recorder charts, and return recorders and charts to

Seller. Recorders shall be operative for the entire "in-transit" time. An internal inspection will be made if:

Both the recorders fail to record the entire trip.

The transformer is subjected to horizontal impacts above Zone 2.

Visible load shifting is apparent on rail car or trailer.

In the event an internal inspection is made, the Seller shall be responsible for the cost (to PNM) incurred for

the inspection.

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 EE-RM/STD-00-550 COMMENT 86

the sepias and aperture cards shall be marked in permanent print with the purchaser's purchase order, 

destination of equipment, Seller's requisition number, Seller's factory number, Seller's shop order number, 

and date. A sepia of each of the completed nameplates shall also be furnished. 

All of the above documents shall be sent to: 

Robert L. Perlichek 

Substation Engineer 

Public Service Company of New Mexico 

Alvarado Square 

Albuquerque, NM 87158 

As soon as test data is available, six certified copies of this information will be furnished. 

8.6.2 Shipment 

The transformer, switchgear, and transformer oil shall be shipped f.o.b. destination with freight prepaid and 

allowed, to a location specified on the Purchase Order. 

The transformer shall be filled with certified dry breathing air for shipping, if shipped by rail. Transformer 

can be shipped oil filled if shipped by truck. 

Transformer insulating oil shall be shipped by tank truck to the site specified by the Purchaser, if 

transformer is shipped by rail. 

Demurrage charges, if applicable, must be fully described as to costs, the free time period in days or months 

at which point costs would commence, and the site where the free time period would commence. The 

Seller must furnish documentation satisfactory to PNM, substantiating any demurrage charges incurred, 

prior to the payment of such charges. 

Two impact recorders shall be provided: one on the rail car or truck bed and one on the main tank. 

Purchaser's personnel will remove recorders, review recorder charts, and return recorders and charts to· 

Seller. Recorders shall be operative for the entire "in-transit" time. An internal inspection will be made if: 

Both the recorders fail to record the entire trip. 

The transformer is subjected to horizontal impacts above Zone 2. 

Visible load shifting is apparent on rail car or trailer. 

In the event an internal inspection is made, the Seller shall be responsible for the cost (to PNM) incurred for 

the inspection. 

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The Seller shall notify the Purchaser approximately seven (7) days prior to shipment.

Six weeks before shipment, the following information must be provided:

At least two copies of a complete bill of material. Demurrage and detention schedules.

Detailed receiving and handling instructions.

Two weeks before shipment, the following is required:

Railroad car and truck numbers and routing.

Departure dates.

Estimated dates of arrival.

Detailed packing lists for each shipment.

8.6.3 Shipping Preparations

Seller shall adequately prepare all of the equipment for shipment. All equipment shall be weatherproof

packaged for extended outdoor storage, with recommended storage instructions.

All equipment shall be clearly identified with a securely fastened, weatherproof tag, labeled with

Purchaser's Purchase Order Number, Specification Number (including revision number), equipment number

(if any) and service. All shipping containers, packing lists, Bills of Material, correspondence, etc., shall be

identified with the same above information. All boxes, shipping containers, crates, etc., shall have a

weatherproof packing list firmly attached to the exterior and a duplicate packing slip packed inside.

The Seller shall be responsible for his subcontractor(s) adhering to the above shipping preparations on all

equipment and items shipped to the Purchaser by the subcontractor(s).

8.6.4 Warranty

The Seller shall at its own expense repair or replace any equipment manufactured or supplied by the Seller

for any failure of the equipment or any component or part to conform to this specification or any defect or

material workmanship or design thereof. The Seller, at its own expense, shall also cause to be remedied

damage to equipment, the site, or buildings or the contents thereof which is the result of any such failure or

defect, and restore any damage to any component of the station.

8.6.4.1 Warranty Repair

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 EE-RM/STD-00-550 COMMENT 86

The Seller shall notify the Purchaser approximately seven (7) days prior to shipment. 

Six weeks before shipment, the following information must be provided: 

At least two copies of a complete bill of material. Demurrage and detention schedules. 

Detailed receiving and handling instructions. 

Two weeks before shipment, the following is required: 

Railroad car and truck numbers and routing. 

Departure dates. 

Estimated dates of arrival. 

Detailed packing lists for each shipment. 

8.6.3 Shipping Preparations 

Seller shall adequately prepare all of the equipment for shipment. All equipment shall be weatherproof 

packaged for extended outdoor storage, with recommended storage instructions. 

All equipment shall be clearly identified with a securely fastened, weatherproof tag, labeled with 

Purchaser's Purchase Order Number, Specification Number (including revision number), equipment number 

(if any) and service. All shipping containers, packing lists, Bills of Material, correspondence, etc., shall be 

identified with the same above information. All boxes, shipping containers, crates, etc., shall have a 

weatherproof packing list firmly attached to the exterior and a duplicate packing slip packed inside. 

The Seller shall be responsible for his subcontractor(s) adhering to the above shipping preparations on all 

equipment and items shipped to the Purchaser by the subcontractor(s). 

8.6.4 Warranty 

The Seller shall at its own expense repair or replace any equipment manufactured or supplied by the Seller 

for any failure of the equipment or any component or part to conform to this specification or any defect or 

material workmanship or design thereof. The Seller, at its own expense, shall also cause to be remedied 

damage to equipment, the site, or buildings or the contents thereof which is the result of any such failure or 

defect, and restore any damage to any component of the station. 

8.6.4.1 Warranty Repair 

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In the event any equipment or component is repaired or replaced by the Seller during the warranty

period, then the equipment or component repaired or replaced shall be fully warranted for the same

period specified in the specification from the date of repair or replacement.

8.6.4.2 Warranty Period

The warranty period shall be fully effective for twelve (12) months after energization, but need not to

exceed eighteen (18) months after shipment.

8.6.4.3 Warranty Liability

As part of the Seller's warranty, the Seller shall reimburse the cost (to PNM) of all oil-handling

resulting from defects both in workmanship or design.

8.6.5 Quality Assurance

The Seller shall conform to Quality Assurance Requirements detailed in Appendix 3. In addition the Seller

shall provide the following "Certificate of Conformance" with this transformer/switchgear:

The Company certifies that this unit meets all the requirements of PNM's Specification SE-US-83-2

with the following exceptions agreed to by both Seller and Purchaser on:

1.

2.

3.

PNM's Terms, Conditions and Specifications shall take precedence unless otherwise mutually agreed upon

in writing.

9.0 POWER TRANSFORMERS

9.1 RATING SECTION

The transformer shall be a two winding 115 kV Delta/13.8 kV Delta with internal (Hepner type winding) or

external grounding bank on the transformer secondary side.*

OR

Three winding 115 kV WYE (ungrounded) /13.8 kV grounded wye with buried Delta tertiary winding.

9

 EE-RM/STD-00-550 COMMENT 86

In the event any equipment or component is repaired or replaced by the Seller during the warranty 

period, then the equipment or component repaired or replaced shall be fully warranted for the same 

period specified in the specification from the date of repair or replacement. 

8.6.4.2 Warranty Period 

The warranty period shall be fully effective for twelve (12) months after energization, but need not to 

exceed eighteen (18) months after shipment. 

8.6.4.3 Warranty Liability 

As part of the Seller's warranty, the Seller shall reimburse the cost (to PNM) of all oil-handling 

resulting from defects both in workmanship or design. 

8.6.5 Quality Assurance 

The Seller shall conform to Quality Assurance Requirements detailed in Appendix 3. In addition the Seller 

shall provide the following "Certificate of Conformance" with this transformer/switchgear: 

The Company certifies that this unit meets all the requirements of PNM's Specification SE-US-83-2 

with the following exceptions agreed to by both Seller and Purchaser on: 

1. 

2. 

3. 

PNM's Terms, Conditions and Specifications shall take precedence unless otherwise mutually agreed upon 

in writing. 

9.0 POWER TRANSFORMERS 

9.1 RATING SECTION 

The transformer shall be a two winding 115 kV Delta/13.8 kV Delta with internal (Hepner type winding) or 

external grounding bank on the transformer secondary side. * 

OR 

Three winding 115 kV WYE (ungrounded) /13.8 kV grounded wye with buried Delta tertiary winding. 

- 9 -
This transformer system, including grounding equipment, shall be rated for continuous current

unbalance duty of at least 1,400 kVA. This transformer system shall also provide a class A grounded

secondary system (XO/Xl).

Both windings of this transformer shall be self-protecting and shall be oil immersed with the following

ratings:

OA output at 55 °C, 65°C: 1*kVA, 11.2 MVA

OA/FOA OR OA/FA output at 55 °C, 65°C: 12.5 MVA, 14.0 MVA

Average winding temperature rise: 55°C

Insulation class: 65°C

Frequency: 60 Hertz

Phase: 3

High-voltage rating: 115 ,000 volts

Low-voltage : 13,800 volts

Impedance: See Impedance Section

Basic impulse insulation level:

High voltage: 450 kV

Low voltage : 110 kV

9.2 IMPEDANCE

This transformer shall have a design impedance of 7.5 percent on a 10 MVA base from H (115 kV) to X

(13.8 kV) with ANSI C57.12.00 standard @ 7.5 percent tolerances allowed.

9.3 BUSHINGS

All bushings shall be sky grey, ANSI-70, in color. Bushing BIL's given are acceptable at an altitude of

5,000 feet.

Low voltage bushings shall be 13.8 kV class, 110 kV BIL, side mounted, in segment 4, per ANSI

C57.12.1Oa.

 EE-RM/STD-00-550 COMMENT 86

* This transformer system, including grounding equipment, shall be rated for continuous current 

unbalance duty of at least 1,400 kV A. This transformer system shall also provide a class A grounded 

secondary system (XO/Xl). 

Both windings of this transformer shall be self-protecting and shall be oil immersed with the following 

ratings: 

OA output at 55°C, 65°C: 1 *kV A, 11.2 MV A 

OAIFOA OR OAIFA output at 55°C, 65°C: 12.5 MVA, 14.0 MVA 

Average winding temperature rise: 55°C 

Insulation class: 65°C 

Frequency: 60 Hertz 

Phase: 3 

High-voltage rating: 115,000 volts 

Low-voltage: 13,800 volts 

Impedance: See Impedance Section 

Basic impulse insulation level: 

9.2 IMPEDANCE 

High voltage: 450 kV 

Low voltage: 110 k V 

This transformer shall have a design impedance of 7.5 percent on a 10 MVA base from H (115 kV) to X 

(13.8 kV) with ANSI C57.12.00 standard @ 7.5 percent tolerances allowed. 

9.3 BUSHINGS 

All bushings shall be sky grey, ANSI-70, in color. Bushing BIL's given are acceptable at an altitude of 

5,000 feet. 

Low voltage bushings shall be 13.8 kV class, 110 kV BIL, side mounted, in segment 4, per ANSI 

C57.12.10a. 

- 10-
High voltage bushings shall be 115 kV class, 550 kV BIL, pocket mounted, in segment 3. Overall height

from base of the transformer to the top of the bushings shall not exceed fifteen (15) feet.

The secondary neutral, if required, shall be brought out through one 13.8 kV class, 110 kV BIL, bushings,

side mounted.

An external core-ground test bushing shall be provided, top mounted.

If a high side WYE connection is quoted, the high side neutral shall be left ungrounded and shall be brought

outside of the transformer tank by means of a pocket or side mounted bushing. Provision for mounting a

fourth (4th) station class, metal oxide, surge arrester shall be included in the high side WYE connection

quotation.

If a high side ungrounded wye connection is quoted, the manufacturer should suggest the BIL rating of the

neutral end of the ungrounded wye and the rating of the lighting arrester to be attached thereto.

9.3.1 Bushing Terminals

All bushing terminal connectors will be furnished by the transformer Seller. The connectors will be

standard 4-hole NEMA bronze stud connectors compatible with the maximum current rating of the

bushing. The stud connectors shall be finished on both sides of the four-hole pad and shall be

compatible for connection to aluminum four-hole pads.

9.4 WINDINGS

Windings shall be copper.

All joints shall be welded or brazed, except compression type may be used for terminal connections. Bolted

connections may be used at bushing and terminal boards, provided suitable locking devices are used.

9.5 HIGH-VOLTAGE TAPS

This transformer shall be provided with an EEI-NEMA rated deenergized tap changer having two 2%

percent steps above and two 2% percent steps below nominal primary voltage 115 kV. An externally

operated manual tap changer handle, accessible from ground level, shall be furnished with provisions for

padlocking.

9.6 LOAD TAP CHANGING (LTC)

The transformer will have automatic load tap changer equipment which will operate under load to provide

sixteen 5/8 percent steps above and sixteen 5/8 percent steps below the rated voltage tap.

 EE-RM/STD-00-550 COMMENT 86

High voltage bushings shall be 115 kV class, 550 kV BIL, pocket mounted, in segment 3. Overall height 

from base of the transformer to the top of the bushings shall not exceed fifteen (15) feet. 

The secondary neutral, if required, shall be brought out through one 13.8 kV class, 110 kV BIL, bushings, 

side mounted. 

An external core-ground test bushing shall be provided, top mounted. 

If a high side WYE connection is quoted, the high side neutral shall be left ungrounded and shall be brought 

outside of the transformer tank by means of a pocket or side mounted bushing. Provision for mounting a 

fourth (4th) station class, metal oxide, surge arrester shall be included in the high side WYE connection 

quotation. 

If a high side ungrounded wye connection is quoted, the manufacturer should suggest the BIL rating of the 

neutral end of the ungrounded wye and the rating of the lighting arrester to be attached thereto. 

9.3.1 Bushing Terminals 

All bushing terminal connectors will be furnished by the transformer Seller. The connectors will be 

standard 4-hole NEMA bronze stud connectors compatible with the maximum current rating of the 

bushing. The stud connectors shall be finished on both sides of the four-hole pad and shall be 

compatible for connection to aluminum four-hole pads. 

9.4 WINDINGS 

Windings shall be copper. 

All joints shall be welded or brazed, except compression type may be used for terminal connections. Bolted 

connections may be used at bushing and terminal boards, provided suitable locking devices are used. 

9.5 HIGH-VOLTAGE TAPS 

This transformer shall be provided with an EEI-NEMA rated deenergized tap changer having two 2% 

percent steps above and two 2% percent steps below nominal primary voltage 115 kV. An externally 

operated manual tap changer handle, accessible from ground level, shall be furnished with provisions for 

padlocking. 

9.6 LOAD TAP CHANGING (LTC) 

The transformer will have automatic load tap changer equipment which will operate under load to provide 

sixteen 5/8 percent steps above and sixteen 5/8 percent steps below the rated voltage tap. 

- 11 -
When the load tap changer equipment is on a position at or above rated secondary voltage, the transformer

will be capable of supplying rated kVA. When the load tap changer equipment is on a position below rated

secondary voltage, the transformer will be capable of supplying rated current.

The load tap changer will be located in a compartment mounted on the transformer, filled with oil separate

from the oil in the main tank, with the following accessories:

Hinged door or cover for maintenance access with suitable gaskets.

Fill and drain valves.

Magnetic liquid level gauge with alarm contacts.

Manhole for inspection without lowering the oil level.

Mechanical pressure relief device with automatic reset and reseal, alarm contacts, and direct

mechanical indicator.

Connection for vacuum line 3" NPT.

The tap changer control equipment shall include:

Switch for selecting local or remote control.

Operation control switch with automatic and off manual positions.

Position indicator reading 16L-N-16R, externally visible.

Light and convenience outlet in control cabinet, 120 volt, 20 ampere.

Power supply switch.

Limit switches and mechanical stops to prevent travel beyond extreme tap positions.

Voltage testing terminals.

Space heater with thermostat set at 20°C.

The power required to drive the mechanism will be obtained from an external Purchaser furnished control

power transformer supplying 240/120 volts.

Tap changer controls shall be wired and labeled such that "Raise" and "Lower" indications refer to the 13.8

kV secondary voltage of the transformer.

 EE-RM/STD-00-550 COMMENT 86

When the load tap changer equipment is on a position at or above rated secondary voltage, the transformer 

will be capable of supplying rated kV A. When the load tap changer equipment is on a position below rated 

secondary voltage, the transformer will be capable of supplying rated current. 

The load tap changer will be located in a compartment mounted on the transformer, filled with oil separate 

from the oil in the main tank, with the following accessories: 

Hinged door or cover for maintenance access with suitable gaskets. 

Fill and drain valves. 

Magnetic liquid level gauge with alarm contacts. 

Manhole for inspection without lowering the oil level. 

Mechanical pressure relief device with automatic reset and reseal, alarm contacts, and direct 

mechanical indicator. 

Connection for vacuum line 3" NPT. 

The tap changer control equipment shall include: 

Switch for selecting local or remote control. 

Operation control switch with automatic and off manual positions. 

Position indicator reading 16L-N-16R, externally visible. 

Light and convenience outlet in control cabinet, 120 volt, 20 ampere. 

Power supply switch. 

Limit switches and mechanical stops to prevent travel beyond extreme tap positions. 

Voltage testing terminals. 

Space heater with thermostat set at 20°C. 

The power required to drive the mechanism will be obtained from an external Purchaser furnished control 

power transformer supplying 240/120 volts. 

Tap changer controls shall be wired and labeled such that "Raise" and "Lower" indications refer to the 13.8 

kV secondary voltage of the transformer. 

- 12-
9.7 COOLING EQUIPMENT

9.7.1 Radiators

If the transformer is designed with removable radiators, the radiator connections shall be made with

bolted flange-type, oil tight fittings. Valves shall be provided so that individual radiators, or radiator

bank if a common header is used, may be removed without lowering the oil level in the main

transformer tank.

Valves shall also be provided to permit removal of oil pump units and associated motors without loss

of oil, when applicable.

These valves shall be equipped with indicators to show clearly their position, open or closed, and shall

be arranged so that they can be bolted in either the open or closed position and must be of a type which

do not leak around their operating stem.

Each radiator, or radiator bank, if a common header is used, shall be provided with a drain plug at its

lowest point and an air inlet plug at the top. Plugs shall have a square head and standard tapered pipe

threads.

The fittings on the cooler assemblies will also be used to flush each entire assembly including the

piping, pump, and where possible, the pump motor. The bottom fitting shall be at the lowest point of

the assembly, whether this point is in a pipe, the pump, or the pump motor housing. Where the pump

motor is the lowest part of the assembly, it will not be necessary that the fitting be in it if the motor is

not in the transformer oil or if the flow through the motor is so restricted as to prohibit proper flushing

of the cooler assembly. In such cases, the fitting shall be in the lowest point of the assembly exclusive

of the motor housing.

9.7.2 Fans

All fan motors shall be totally enclosed, nonventilated, with sealed, prelubricated ball bearings, and

rated for all-weather outdoor operation.

The motors furnished shall be designed, manufactured and routine tested and shall operate in

accordance with the latest applicable NEMA, IEEE, and ANSI standards. In addition, the motors shall

comply with any applicable standards and tests that may be specified herein.

All motors shall operate successfully at their specified rating at the ambient temperature and altitude

specified in the service conditions.

 EE-RM/STD-00-550 COMMENT 86

9.7 COOLING EQUIPMENT 

9.7.1 Radiators 

If the transformer is designed with removable radiators, the radiator connections shall be made with 

bolted flange-type, oil tight fittings. Valves shall be provided so that individual radiators, or radiator 

bank if a common header is used, may be removed without lowering the oil level in the main 

transformer tank. 

Valves shall also be provided to permit removal of oil pump units and associated motors without loss 

of oil, when applicable. 

These valves shall be equipped with indicators to show clearly their position, open or closed, and shall 

be arranged so that they can be bolted in either the open or closed position and must be of a type which 

do not leak around their operating stem. 

Each radiator, or radiator bank, if a common header is used, shall be provided with a drain plug at its 

lowest point and an air inlet plug at the top. Plugs shall have a square head and standard tapered pipe 

threads. 

The fittings on the cooler assemblies will also be used to flush each entire assembly including the 

piping, pump, and where possible, the pump motor. The bottom fitting shall be at the lowest point of 

the assembly, whether this point is in a pipe, the pump, or the pump motor housing. Where the pump 

motor is the lowest part of the assembly, it will not be necessary that the fitting be in it if the motor is 

not in the transformer oil or if the flow through the motor is so restricted as to prohibit proper flushing 

of the cooler assembly. In such cases, the fitting shall be in the lowest point of the assembly exclusive 

of the motor housing. 

9.7.2 Fans 

All fan motors shall be totally enclosed, nonventilated, with sealed, prelubricated ball bearings, and 

rated for all-weather outdoor operation. 

The motors furnished shall be designed, manufactured and routine tested and shall operate in 

accordance with the latest applicable NEMA, IEEE, and ANSI standards. In addition, the motors shall 

comply with any applicable standards and tests that may be specified herein. 

All motors shall operate successfully at their specified rating at the ambient temperature and altitude 

specified in the service conditions. 

- 13 -
The continuous horsepower nameplate rating shall be greater than or equal to the maximum brake

horsepower required by the driven equipment when the driven equipment is operating at the maximum

load conditions. Service factor rating shall not be used to meet this requirement.

Insulation for all motors shall equal or exceed the requirements for Class B insulation, unless otherwise

approved by the buyer.

The maximum hottest-spot temperature of the windings shall not exceed 135°C with operating under

the conditions of nameplate rating output, maximum ambient temperature and elevation specified

herein.

Integral horsepower motors shall have a NEMA Design B torque characteristic unless otherwise

required by the driven equipment.

9.7.3 Oil Preservation System

The oil preservation system shall be a nitrogen blanket type with the combustible gas sampling

equipment.

9.7.4 Insulating Oil

The insulating oil shall be a pure mineral oil obtained from petroleum. It shall not contain moisture,

acids, alkali, free sulphur, or any other substances which will affect its insulating and cooling qualities

and shall be of a quality which will not affect adversely nor be adversely affected by the insulation, the

insulation varnish, or other parts of the equipment with which it will be in contact. Oil inhibitors shall

be used.

The oil shall have the following characteristics:

1. Viscosity: Not less than 12 seconds, nor

(ASTM D-88) greater than 66 seconds Saybolt

at 40°C.

2. Flash Point: Not less than 145°C.

(ASTM D-92)

3. Moisture Content: Not higher than 20 ppm.

(ASTM D-1533)

4. Pour Point: Not higher than minus 45°C.

5. Neutralization Number: Not more than 0.03 milligram of

(ASTM D-974) potassium hydroxide required to

 EE-RM/STD-00-550 COMMENT 86

The continuous horsepower nameplate rating shall be greater than or equal to the maximum brake 

horsepower required by the driven equipment when the driven equipment is operating at the maximum 

load conditions. Service factor rating shall not be used to meet this requirement. 

Insulation for all motors shall equal or exceed the requirements for Class B insulation, unless otherwise 

approved by the buyer. 

The maximum hottest-spot temperature of the windings shall not exceed 135°C with operating under 

the conditions of nameplate rating output, maximum ambient temperature and elevation specified 

herein. 

Integral horsepower motors shall have a NEMA Design B torque characteristic unless otherwise 

required by the driven equipment. 

9.7.3 Oil Preservation System 

The oil preservation system shall be a nitrogen blanket type with the combustible gas sampling 

equipment. 

9.7.4 Insulating Oil 

The insulating oil shall be a pure mineral oil obtained from petroleum. It shall not contain moisture, 

acids, alkali, free sulphur, or any other substances which will affect its insulating and cooling qualities 

and shall be of a quality which will not affect adversely nor be adversely affected by the insulation, the 

insulation varnish, or other parts of the equipment with which it will be in contact. Oil inhibitors shall 

be used. 

The oil shall have the following characteristics: 

1. Viscosity: Not less than 12 seconds, nor 

(ASTM D-88) greater than 66 seconds Saybolt 

at 40°C. 

2. Flash Point: Not less than 145°C. 

(ASTM D-92) 

3. Moisture Content: Not higher than 20 ppm. 

(ASTM D-1533) 

4. Pour Point: Not higher than minus 45°C. 

5. Neutralization Number: 

(ASTM D-974) 

Not more than 0.03 milligram of 

potassium hydroxide required to 

- 14 -
neutralize 1 gram of oil.

6. Mineral Acids:The oil shall show absence of chlorides

(ASTM D-878) and sulphates.

7. Free and Corrosive

8. Sulphur: The oil shall not contain free sulphur

(ASTM D-1275) or corrosive sulphur compounds.

9. Interfacial Tension: 40 Dynes/CM at 25°C

(ASTM-97)

10. Dielectric Strength: Not less than 30 W.

(ASTM B-877)

11. Color: Very light, 0.5 maximum.

(ASTM D-1500)

12. Power Factor, 60 Hertz: 0.05 percent maximum at 25°C.

(ASTM B-924)

13. Specific Gravity: 0.91 maximum at 15°C.

(ASTM D-1298)

14. Oxidation Stability: 0.15 percent maximum sludge after

(ASTM D-2440) 72 hours. 0.5 mg of KOH maximum

total acid after 72 hours.

(ASTM D-611)

15. Aniline Point: Not higher than 75°C.

16. Steam Emulsion: Not higher than 30 seconds.

(ASTM 1935)

17. Inhibitor: 2, 6 Ditertiary - Butyl - Paracresol - 0.2% by weight

The Seller shall certify the oil delivered with this equipment, and any oil used in production or testing

of this equipment, is classified as "non-PCB" (polychlorinated biphenyl) with contamination of less

than 50 ppm (parts per million) per EPA publication 40 DFR Part 761, dated May 31, 1979. The

Purchaser will not accept delivery of the equipment until such certification is received. Demurrage

incurred due to lack of this certification will be paid by the Seller. The Seller is also responsible to

provide the same certification as listed above for any oil supplied by subcontractor.

 EE-RM/STD-00-550 COMMENT 86

neutralize 1 gram of oil. 

6. Mineral Acids:The oil shall show absence of chlorides 

(ASTM D-878) and sulphates. 

7. Free and Corrosive 

8. Sulphur: 

(ASTM D-1275) 

The oil shall not contain free sulphur 

or corrosive sulphur compounds. 

9. Interfacial Tension: 40 Dynes/CM at 25°C 

(ASTM-97) 

10. Dielectric Strength: Not less than 30 kV. 

(ASTM B-877) 

11. Color: Very light, 0.5 maximum. 

(ASTM D-1500) 

12. Power Factor, 60 Hertz: 0.05 percent maximum at 25°C. 

(ASTM B-924) 

13. Specific Gravity: 0.91 maximum at 15°C. 

(ASTM D-1298) 

14. Oxidation Stability: 0.15 percent maximum sludge after 

(ASTM D-2440) 72 hours. 0.5 mg of KOH maximum 

total acid after 72 hours. 

15. Aniline Point: Not higher than 75°C. 

(ASTM D-611) 

16. Steam Emulsion: Not higher than 30 seconds. 

(ASTM 1935) 

17. Inhibitor: 2,6 Ditertiary - Butyl - Paracresol - 0.2% by weight 

The Seller shall certify the oil delivered with this equipment, and any oil used in production or testing 

of this equipment, is classified as "non-PCB" (polychlorinated biphenyl) with contamination of less 

than 50 ppm (parts per million) per EPA publication 40 DFR Part 761, dated May 31, 1979. The 

Purchaser will not accept delivery of the equipment until such certification is received. Demurrage 

incurred due to lack of this certification will be paid by the Seller. The Seller is also responsible to 

provide the same certification as listed above for any oil supplied by subcontractor. 

- 15 -
9.8 TANK AND ACCESSORIES

Tank shall be constructed to withstand filling with oil under full vacuum without permanent distortion.

Tank shall be of the all-welded type construction.

All gauges and indicators shall have polycarbonate lenses.

The following moving, handling facilities, and accessories shall be provided:

Lifting eyes for lifting cover only.

Facilities for lifting core and coil assembly from tank.

Transformer base designed for rolling or skidding parallel to either center line.

Pulling eyes.

Lifting lugs for lifting complete transformer.

Jack bosses for raising complete transformer.

Domed cover to shed water and to collect gas for the gas detecting relay.

Mechanical pressure relief device with automatic reseal, alarm contacts, and direct mechanical

indicator. Qualitrol model number 208-001-009 or equivalent.

Two-inch globe valve for filter-press inlet.

Two-inch globe valve for complete tank drain, filter-press outlet, and sampling device.

Valves to permit draining and removal of radiators without draining oil from the main tank.

Two manholes in cover, minimum, each with a minimum diameter of 18 inches.

Dial-type liquid temperature indicator with two adjustable alarm contacts for Purchaser use which are

accessible via a removable front cover. Relay shall be Qualitrol Corporation, Model 104-077-01 or

equivalent. This relay shall be removable for field testing. Contact wiring shall be terminated in the

control cabinet.

Magnetic liquid level gauge with low-level alarm contacts.

 EE-RM/STD-00-550 COMMENT 86

9.8 TANK AND ACCESSORIES 

Tank shall be constructed to withstand filling with oil under full vacuum without permanent distortion. 

Tank shall be of the all-welded type construction. 

All gauges and indicators shall have polycarbonate lenses. 

The following moving, handling facilities, and accessories shall be provided: 

Lifting eyes for lifting cover only. 

Facilities for lifting core and coil assembly from tank. 

Transformer base designed for rolling or skidding parallel to either center line. 

Pulling eyes. 

Lifting lugs for lifting complete transformer. 

Jack bosses for raising complete transformer. 

Domed cover to shed water and to collect gas for the gas detecting relay. 

Mechanical pressure relief device with automatic reseal, alarm contacts, and direct mechanical 

indicator. Qualitrol model number 208-001-009 or equivalent. 

Two-inch globe valve for filter-press inlet. 

Two-inch globe valve for complete tank drain, filter-press outlet, and sampling device. 

Valves to permit draining and removal of radiators without draining oil from the main tank. 

Two manholes in cover, minimum, each with a minimum diameter of 18 inches. 

Dial-type liquid temperature indicator with two adjustable alarm contacts for Purchaser use which are 

accessible via a removable front cover. Relay shall be Qualitrol Corporation, Model 104-077-01 or 

equivalent. This relay shall be removable for field testing. Contact wiring shall be terminated in the 

control cabinet. 

Magnetic liquid level gauge with low-level alarm contacts. 

- 16 -
Thermal relay on the common windings, with four single-pole contacts available for Purchaser use.

Relays shall be removable for field testing with adjustable contacts accessible via a removable front

cover. Relay shall be a Qualitrol Corporation, Model 104-01.

Nameplate(s) shall be in accordance with ANSI-C57.12.30- 1971 and C57.12-1973. Nameplate C

shall be used.

One three-inch NPT female threaded opening in top of main tank located diametrically opposite the

filter-press inlet. This is to be used for vacuum oil filling and is to be furnished with an extra-heavy

capped nipple to close the opening.

All gaskets in contact with oil bearing surfaces shall be nitrile butadine rubber. Exceptions must be

approved in writing by Purchaser. Cork, in any form, is not acceptable as gasket material.

Four 1/4-inch diameter by 3/4-inch mounting studs for an impact recorder welded to the sidewall of the

transformer tank, accessible from ground level, with a vertical spacing of 9-5/8 inches and a horizontal

spacing of 8-5/8 inches.

Fault pressure relay, Qualitrol Type 900-009-01, with an auxiliary relay assembly for seal-in operation

having an alarm and one trip contact, Qualitrol Type 909-004-01, 48 volt DC.

The center lines of tank shall be permanently marked near the base on all four sides of the tank.

One complete set of gaskets for each. different size of manhole, handhole, radiator, etc., shall be

furnished unless reusable gaskets are furnished.

9.9 GROUNDING

Copper-faced, two-hole NEMA ground pads shall be welded to opposite sides of the tank with lugs for 1/0

to 4/0 AWG copper.

Seller shall furnish all connections from neutral bushing to ground pads at base of the tank.

All ground leads shall be copper or aluminum bar of one piece construction. The Seller shall provide

provisions to securely fasten all ground leads to the transformer and supporting structures.

9.10 LIGHTNING ARRESTERS

Transformer shall have three (3) 115 kV station class metal oxide lighting arresters rated 90 kV suitable for

use on a 115 kV effectively grounded system.

9.11 AUDIBLE SOUND LEVEL

 EE-RM/STD-00-550 COMMENT 86

Thermal relay on the common windings, with four single-pole contacts available for Purchaser use. 

Relays shall be removable for field testing with adjustable contacts accessible via a removable front 

cover. Relay shall be a Qualitrol Corporation, Model 104-01. 

Nameplate(s) shall be in accordance with ANSI-C57.12.30- 1971 and C57.12-1973. Nameplate C 

shall be used. 

One three-inch NPT female threaded opening in top of main tanle located diametrically opposite the 

filter-press inlet. This is to be used for vacuum oil filling and is to be furnished with an extra-heavy 

capped nipple to close the opening. 

All gaskets in contact with oil bearing surfaces shall be nitrile butadine rubber. Exceptions must be 

approved in writing by Purchaser. Cork, in any form, is not acceptable as gasket material. 

Four 1/4-inch diameter by 3/4-inch mounting studs for an impact recorder welded to the sidewall of the 

transformer tank, accessible from ground level, with a vertical spacing of 9-5/8 inches and a horizontal 

spacing of 8-5/8 inches. 

Fault pressure relay, Qualitrol Type 900-009-01, with an auxiliary relay assembly for seal-in operation 

having an alarm and one trip contact, Qualitrol Type 909-004-01, 48 volt DC. 

The center lines of tank shall be permanently marked near the base on all four sides of the tank. 

One complete set of gaskets for each different size of manhole, handhole, radiator, etc., shall be 

furnished unless reusable gaskets are furnished. 

9.9 GROUNDING 

Copper-faced, two-hole NEMA ground pads shall be welded to opposite sides of the tank with lugs for 110 

to 4/0 A WG copper. 

Seller shall furnish all connections from neutral bushing to ground pads at base of the tank. 

All ground leads shall be copper or aluminum bar of one piece construction. The Seller shall provide 

provisions to securely fasten all ground leads to the transformer and supporting structures. 

9.10 LIGHTNING ARRESTERS 

Transformer shall have three (3) 115 kV station class metal oxide lighting arresters rated 90 kV suitable for 

use on a 115 kV effectively grounded system. 

9.11 AUDIBLE SOUND LEVEL 

- 17 -
Transformer shall be designed and guaranteed to have an average sound level not exceeding the levels listed

in the latest revision of NEMA TR-1--1980.

9.12 CONTROL CABINET

Control cabinet, weatherproof, dead-front, mounted so as to be free of vibration from the main transformer

tank, with all secondary and control wiring terminated on properly identified terminal blocks, GE Type EB25.

9.13 CONTROLS AND WIRING

All electrical wiring between permanently mounted accessories and the control cabinet shall be enclosed in

a rigid steel conduit securely fastened to the transformer tank in a manner to prevent mechanical damage or

vibration.

All electrical wiring between the control cabinet and the conduit, routed on and secured to the tank, up to

close proximity points near each motor. All interconnecting raceway between the conduit and the motors

shall be liquid-tight, flexible metal conduit with sunlight resistant jacket.

All conduit joints and fittings shall be dust tight and watertight.

Control, current transformer, auxiliary power and alarm circuit wiring shall be 600 volt, at least Number 12

AWG, stranded copper conductor with TA, SIS or other approved insulation. All wiring shall be capable of

passing the IPCEA Flame Resisting Test, IPCEA S-61-402, Section 6,5. Hinge-type wiring shall be used

for all connections to swinging panels.

All connections to external circuits shall be brought to terminal blocks within the control cabinet. All

terminal block points and associated wiring shall be grouped and separated as to low voltage power, low

voltage instrumentation and control, and low-level signal.

All terminal blocks for low voltage control and instrumentation shall be GE Type EB-25 or engineerapproved equal. Short circuiting type terminal blocks shall be provided for current transformer secondary

circuits. All wiring shall be connected to terminal blocks and device studs with insulated, compression

barrel, ring-type lugs. All terminal blocks for power shall be GE Type EB-26 or engineer approved equal.

All terminal blocks shall have at least 20 percent spare positions for use by Purchaser. All blocks shall be

positioned to allow unrestricted access to the terminal points and associated wiring. Sufficient cabinet

space for all field cables shall be provided to avoid cable bunching or stacking between the terminal blocks

and the cabinet cable entries.

All auxiliary equipment controls shall be rated for operation on an integral 120-volt AC system. The AC

rated equipment shall operate satisfactorily with a supply voltage regulation of * 10 percent of nominal. All

annunciator and protective equipment controls shall be rated for operation from a purchaser supplied 48-

 EE-RM/STD-00-550 COMMENT 86

Transformer shall be designed and guaranteed to have an average sound level not exceeding the levels listed 

in the latest revision of NEMA TR-I--1980. 

9.12 CONTROL CABINET 

Control cabinet, weatherproof, dead-front, mounted so as to be free of vibration from the main transformer 

tank, with all secondary and control wiring terminated on properly identified terminal blocks, GE Type EB25. 

9.13 CONTROLS AND WIRING 

All electrical wiring between permanently mounted accessories and the control cabinet shall be enclosed in 

a rigid steel conduit securely fastened to the transformer tank in a manner to prevent mechanical damage or 

vibration. 

All electrical wiring between the control cabinet and the conduit, routed on and secured to the tank, up to 

close proximity points near each motor. All interconnecting raceway between the conduit and the motors 

shall be liquid-tight, flexible metal conduit with sunlight resistant jacket. 

All conduit joints and fittings shall be dust tight and watertight. 

Control, current transformer, auxiliary power and alarm circuit wiring shall be 600 volt, at least Number 12 

AWG, stranded copper conductor with TA, SIS or other approved insulation. All wiring shall be capable of 

passing the IPCEA Flame Resisting Test, IPCEA S-61-402, Section 6,5. Hinge-type wiring shall be used 

for all connections to swinging panels. 

All connections to external circuits shall be brought to terminal blocks within the control cabinet. All 

terminal block points and associated wiring shall be grouped and separated as to low voltage power, low 

voltage instrumentation and control, and low-level signal. 

All terminal blocks for low voltage control and instrumentation shall be GE Type EB-25 or engineerapproved equal. Short circuiting type terminal blocks shall be provided for current transformer secondary 

circuits. All wiring shall be connected to terminal blocks and device studs with insulated, compression 

barrel, ring-type lugs. All terminal blocks for power shall be GE Type EB-26 or engineer approved equal. 

All terminal blocks shall have at least 20 percent spare positions for use by Purchaser. All blocks shall be 

positioned to allow unrestricted access to the terminal points and associated wiring. Sufficient cabinet 

space for all field cables shall be provided to avoid cable bunching or stacking between the terminal blocks 

and the cabinet cable entries. 

All auxiliary equipment controls shall be rated for operation on an integral 120-volt AC system. The AC 

rated equipment shall operate satisfactorily with a supply voltage regulation of * 10 percent of nominal. All 

annunciator and protective equipment controls shall be rated for operation from a purchaser supplied 48-

- 18 -
volt DC supply by Purchaser. The DC rated equipment shall operate satisfactorily with a supply voltage

variation between 42-56 volts.

Thermostatically controlled space heaters, one 20 AMP, 120 VAC duplex convenience outlet, and internal

lighting shall be provided in the control cabinet and shall be served from the integral 120-volt AC system.

9.14 THERMAL PROTECTION

One (1) four-element thermal relay, calibrated to operate as a function of the magnitude of the hot spot

temperature of the transformer winding, shall be included. The four-element thermal relay shall be

removable for field testing and shall be adjustable with access through a removable front cover. The relay

shall be a Qualitrol Corp., Model 104-104-1 or engineer approved equal.

The relay shall have a tripping contact connected in parallel with the 63 contact to operate the 86/T triplockout relay.

The relay shall have a tripping contact connected to operate two (2) General Electric 12HFA51B44F overtemperature auxiliary relays, which in turn will trip and lock out all feeder breakers when the transformer

winding approaches the maximum safe operating temperature. These relays shall be mounted and supplied

in the switchgear.

One dial-type liquid temperature indicator with two (2) adjustable alarm contacts and removable front

cover, Qualitrol Corp., Model 104-077-01 or Purchaser approved equivalent, shall be supplied. The

indicator shall be removable for field testing.

9.15 AUXILIARY POWER SUPPLY

The transformer shall be equipped to accept one-phase, 120/ 240 volt AC, 60 Hertz power.

9.16 CURRENT TRANSFORMERS

Each 115 kV bushing shall be equipped with one (1) 600:5 amp, Class C400 multi-ratio current

transformer.

Each 13.8 kV bushing shall be equipped with one (1) 1200:5 amp, Class C400 multiratio current

transformer.

The secondary neutral bushing on the Hepner winding or the neutral bushing on the grounding bank

transformer shall be equipped with one (1) 600:5 amp Class C400 multiratio current transformer.

Leads of all current transformers shall be wired to properly identified GE Type EB-27 shorting-type

terminal blocks mounted in the control cabinet.

 EE-RM/STD-00-550 COMMENT 86

volt DC supply by Purchaser. The DC rated equipment shall operate satisfactorily with a supply voltage 

variation between 42-56 volts. 

Thermostatically controlled space heaters, one 20 AMP, 120 VAC duplex convenience outlet, and internal 

lighting shall be provided in the control cabinet and shall be served from the integral 120-volt AC system. 

9.14 THERMAL PROTECTION 

One (1) four-element thermal relay, calibrated to operate as a function of the magnitude of the hot spot 

temperature of the transformer winding, shall be included. The four-element thermal relay shall be 

removable for field testing and shall be adjustable with access through a removable front cover. The relay 

shall be a Qualitrol Corp., Model 104-104-1 or engineer approved equal. 

The relay shall have a tripping contact connected in parallel with the 63 contact to operate the 86/T triplockout relay. 

The relay shall have a tripping contact connected to operate two (2) General Electric 12HFA51B44F overtemperature auxiliary relays, which in tum will trip and lock out all feeder breakers when the transformer 

winding approaches the maximum safe operating temperature. These relays shall be mounted and supplied 

in the switchgear. 

One dial-type liquid temperature indicator with two (2) adjustable alarm contacts and removable front 

cover, Qualitrol Corp., Model 104-077-01 or Purchaser approved equivalent, shall be supplied. The 

indicator shall be removable for field testing. 

9.15 AUXILIARY POWER SUPPLY 

The transformer shall be equipped to accept one-phase, 120/240 volt AC, 60 Hertz power. 

9.16 CURRENT TRANSFORMERS 

Each 115 kV bushing shall be equipped with one (1) 600:5 amp, Class C400 multi-ratio current 

transformer. 

Each 13.8 kV bushing shall be equipped with one (1) 1200:5 amp, Class C400 multiratio current 

transformer. 

The secondary neutral bushing on the Hepner winding or the neutral bushing on the grounding bank 

transformer shall be equipped with one (1) 600:5 amp Class C400 multiratio current transformer. 

Leads of all current transformers shall be wired to properly identified GE Type EB-27 shorting-type 

terminal blocks mounted in the control cabinet. 

- 19 -
All current transformers shall comply with ANSI Standard C57.13-1966. All multi-ratio current

transformers shall have all the taps and ratios shown in Table 8 of C47.13-1966 for the corresponding

current transformer rating. No exceptions to this will be allowed. All current transformers shall have a

continuous thermal current rating factor of 2.0 per ANSI C57.13.

9.17 TESTS

This transformer shall be tested in accordance with the standard test procedures as outlined in NEMA

Publication TR 1-1980, ANSI Standard C57.12.90, PNM Quality Assurance Checklist including the

following optional tests:

Impulse tests (excluding front of wave).

Insulation power factor tests per Doble standard test procedure . All bushings shall be included in the

power factor tests. The results shall be reported to the customer . At 10 kV, the transformer must have

an acceptable power factor rating of 0.5 percent or less at 20°C.

Switching surge tests.

Temperature test per ANSI C57.12.90 a thermal equivalent may be substituted only if the following

criterion is met:

1. Electrical duplicate.

2. Mechanical duplicate.

3. Test performed within the last two (2) years.

Corona test--IEEE 262b (see PNM Quality Assurance Checklist).

Excitation current tests at 100, 105, and 110 percent of rated voltage.

A dissolved gas analysis shall be performed on the oil before and immediately after testing.

As a minimum, the impulse, switching surge, and corona tests will be witnessed by the Purchaser, at which

time the PNM Quality Assurance Checklist will be filled out. Seller shall notify Purchaser, in writing, ten

(10) working days prior to testing.

9.17.1 No Load Losses

One test with the test voltage at one hundred and five percent of rated voltage and the deenergized tap

one step (2-1/2 percent) above nominal 115 kV.

 EE-RM/STD-00-550 COMMENT 86

All current transformers shall comply with ANSI Standard C57.13-1966. All multi-ratio current 

transformers shall have all the taps and ratios shown in Table 8 of C47 .13-1966 for the corresponding 

current transformer rating. No exceptions to this will be allowed. All current transformers shall have a 

continuous thermal current rating factor of 2.0 per ANSI C57.13. 

9.17 TESTS 

This transformer shall be tested in accordance with the standard test procedures as outlined in NEMA 

Publication TR 1-1980, ANSI Standard C57.12.90, PNM Quality Assurance Checklist including the 

following optional tests: 

Impulse tests (excluding front of wave). 

Insulation power factor tests per Doble standard test procedure. All bushings shall be included in the 

power factor tests. The results shall be reported to the customer. At 10 kV, the transformer must have 

an acceptable power factor rating of 0.5 percent or less at 20°e. 

Switching surge tests. 

Temperature test per ANSI C57.12.90 a thermal equivalent may be substituted only if the following 

criterion is met: 

1. Electrical duplicate. 

2. Mechanical duplicate. 

3. Test performed within the last two (2) years. 

Corona test--IEEE 262b (see PNM Quality Assurance Checklist). 

Excitation current tests at 100, 105, and 110 percent of rated voltage. 

A dissolved gas analysis shall be performed on the oil before and immediately after testing. 

As a minimum, the impulse, switching surge, and corona tests will be witnessed by the Purchaser, at which 

time the PNM Quality Assurance Checklist will be filled out. Seller shall notify Purchaser, in writing, ten 

(10) working days prior to testing. 

9.17.1 No Load Losses 

One test with the test voltage at one hundred and five percent of rated voltage and the deenergized tap 

one step (2-112 percent) above nominal 115 kV. 

- 20-
One test with the test voltage at one hundred two and one half percent of rated voltage and the

deenergized tap in the neutral position.

One test with the test voltage of one hundred percent of rated voltage and the deenergized tap in the

neutral position.

Six copies of the test results shall be submitted to Purchaser as soon as the data has been tabulated.

9.17.2 Total Losses

One test at one hundred two and one-half percent of rated voltage with the deenergized tap in the

neutral position and the low voltage LTC four steps (2 1/2 percent) above the nominal 13.8 kV position

for loadings at 80 and 100 percent of 12.5 MVA.

9.18 LOSS EVALUATION

The Bidder shall specify "no load", "auxiliary", and "total' losses in his proposal and shall furnish data upon

testing the transformer, in accordance with ANSI-C57.12.90.

Auxiliary losses will be evaluated at load loss rate.

All load losses shall be corrected to a reference temperature of 55°C plus 20°C. No other corrections are

acceptable.

Certified loss test data shall be supplied to the Purchaser prior to shipment of the transformer. The certified

test report shall follow the format shown in the Appendix of C57.12.00 (Special Forms) for the MVA rating

specified in Section 9.18.2.

9.18.1 No Load Losses

The no load losses will be evaluated with the test voltage at one hundred two and one-half (102 1/2)

percent voltage, the deenergized tap in the neutral position and the LTC in the neutral position.

9.18.2 No Load Losses in Grounding Transformer

If a separate grounding transformer is quoted the no load losses of this transformer will be evaluated

with the test voltage at one hundred two and one-half (102-1/2 @) percent of nominal (13.8) kV

voltage. The no load losses will be added to the no load losses of the main power transformer and

evaluated at the rate indicated in Section 9.18.3.

Load losses due to unbalances in the system will not be evaluated.

9.18.3 Total Losses

 EE-RM/STD-00-550 COMMENT 86

One test with the test voltage at one hundred two and one half percent of rated voltage and the 

deenergized tap in the neutral position. 

One test with the test voltage of one hundred percent of rated voltage and the deenergized tap in the 

neutral position. 

Six copies of the test results shall be submitted to Purchaser as soon as the data has been tabulated. 

9.17.2 Total Losses 

One test at one hundred two and one-half percent of rated voltage with the deenergized tap in the 

neutral position and the low voltage LTC four steps (2 112 percent) above the nominal 13.8 kV position 

for loadings at 80 and 100 percent of 12.5 MVA. 

9.18 LOSS EVALUATION 

The Bidder shall specify "no load", "auxiliary", and "total' losses in his proposal and shall furnish data upon 

testing the transformer, in accordance with ANSI-C57.12.90. 

Auxiliary losses will be evaluated at load loss rate. 

All load losses shall be corrected to a reference temperature of 55°C plus 20°e. No other corrections are 

acceptable. 

Certified loss test data shall be supplied to the Purchaser prior to shipment of the transformer. The certified 

test report shall follow the format shown in the Appendix of C57.12.00 (Special Forms) for the MVA rating 

specified in Section 9.18.2. 

9.18.1 No Load Losses 

The no load losses will be evaluated with the test voltage at one hundred two and one-half (102 112) 

percent voltage, the deenergized tap in the neutral position and the LTC in the neutral position. 

9.18.2 No Load Losses in Grounding Transformer 

If a separate grounding transformer is quoted the no load losses of this transformer will be evaluated 

with the test voltage at one hundred two and one-half (102-1I2@) percent of nominal (13.8) kV 

voltage. The no load losses will be added to the no load losses of the main power transformer and 

evaluated at the rate indicated in Section 9.18.3. 

Load losses due to unbalances in the system will not be evaluated. 

9.18.3 Total Losses 

- 21 -
Total losses will be evaluated at 10 MVA assuming one hundred two and one-half percent of rated

voltage is applied to the HV winding, with the deenergized tap in the neutral position and the low

voltage LTC four steps (2-1/2 percent) above the neutral position.

The no load, auxiliary and total losses will be evaluated using the system cost rates below:

No-load loss rate = $4,844 $/kW

Load loss and auxiliary rate = $1,594 $/kW

The total evaluated cost (TEC) will be derived from the following:

T@C = (installed cost x 1.3185) + ($4,844 x no-load loss) + ($1,594 x load loss) +

($1,594 x auxiliary loss)

In the event actual losses exceed the losses guaranteed, as determined by tests performed in accordance

with the applicable provisions of ANSI Standard Test Code C57.12.90, Section 4, "Transformers,

Regulators and Reactors," the Purchaser shall have the right to either reject the equipment or to accept

the equipment under certain conditions. These are provided (1) that the Seller shall pay the Purchaser

an amount to compensate for the excess losses, and (2) that the temperature rise performance shall not

exceed, as confirmed by actual test, that proposed and guaranteed in the proposal. The amount due the

Purchaser shall be calculated as follows:

No Load Losses-Actual: NLA

No Load Losses-Guaranteed: NLG

Load Losses-Actual: LA

Load Losses-Guaranteed: LG

Auxiliary Losses-Actual: ALA

Auxiliary Losses-Guaranteed: ALG

Price Reduction = (NLA - NLG) ($4,844/kW) + (LA - LG)

($1,594/kW) + (ALA - ALG) ($1,594/kW)

For actual losses exceeding the guaranteed losses by more than ten percent (10%), PNM reserves the

right to increase the price reduction as follows for each type of loss:

 EE-RM/STD-00-550 COMMENT 86

Total losses will be evaluated at 10 MV A assuming one hundred two and one-half percent of rated 

voltage is applied to the HV winding, with the deenergized tap in the neutral position and the low 

voltage LTC four steps (2-1/2 percent) above the neutral position. 

The no load, auxiliary and total losses will be evaluated using the system cost rates below: 

No-load loss rate = $4,844 $lkW 

Load loss and auxiliary rate = $1,594 $lkW 

The total evaluated cost (TEC) will be derived from the following: 

T@C = (installed cost x 1.3185) + ($4,844 x no-load loss) + ($1,594 x load loss) + 

($1,594 x auxiliary loss) 

In the event actual losses exceed the losses guaranteed, as determined by tests performed in accordance 

with the applicable provisions of ANSI Standard Test Code C57.12.90, Section 4, "Transformers, 

Regulators and Reactors," the Purchaser shall have the right to either reject the equipment or to accept 

the equipment under certain conditions. These are provided (1) that the Seller shall pay the Purchaser 

an amount to compensate for the excess losses, and (2) that the temperature rise performance shall not 

exceed, as confirmed by actual test, that proposed and guaranteed in the proposal. The amount due the 

Purchaser shall be calculated as follows: 

No Load Losses-Actual: NLA 

No Load Losses-Guaranteed: NLG 

Load Losses-Actual: LA 

Load Losses-Guaranteed: LG 

Auxiliary Losses-Actual: ALA 

Auxiliary Losses-Guaranteed: ALG 

Price Reduction = (NLA - NLG) ($4,844lkW) + (LA - LG) 

($1,594lkW) + (ALA - ALG) ($1,594lkW) 

For actual losses exceeding the guaranteed losses by more than ten percent (10%), PNM reserves the 

right to increase the price reduction as follows for each type of loss: 

- 22-
Price Reduction = 2 [(NLA - NLG) ($4,844/kW) + (LA - LG)

($1,594/kW) + (ALA - ALG) ($@,594/kW)]

No credit will be allowed to the Seller for loss performance less than that guaranteed.

The foregoing shall not be construed in any way to limit or negate any other standard guarantee or

portion thereof which may provide a more comprehensive guarantee than those required by this

specification.

10.0 SWITCHGEAR

The switchgear shall be outdoor metal-clad, of the common sheltered-aisle type, arranged for direct

connection to the power transformer.

The metal-clad switchgear will be thoroughly weatherproofed and dust proofed and will include the

following:

Interior six-foot strip fluorescent lighting and utility outlet with fuses. The lights shall be controlled by

dual switches, located four (4) feet above the floor within one (1) foot of each door.

The base shall be so designed and constructed to prevent rodents and reptiles from entering the

enclosed space between the switchgear assemble and its foundation.

PNM interprets ANSI C37.20-6.2.2 as: "No openings between cubicles." All ventilation shall be to the

outside, not in false work or other cubicles.

All switchgear bus shall be fully insulated.

One set of three (3) 12 kV metal oxide station-type lightning arresters connected between the main bus and

a common ground bar. They are to be mounted so that there is at least 18 inches clearance below the

lightning arresters for cable installations. Lightning arresters manufactured by General Electric,

Westinghouse, or Ohio Brass are acceptable.

10.1 GROUNDING

Each cubicle shall be provided with one (1) copper ground bar for the grounding of instrumentation, as

required. This ground bar shall be continuous with provisions outside switchgear for connection to the

station grounding system.

Main ground bus shall be continuous throughout switchgear assembly. Ground bus shall have two (2)

external NEMA 2-hole pads, located at opposite ends of switchgear assembly.

 EE-RM/STD-00-550 COMMENT 86

Price Reduction = 2 [(NLA - NLG) ($4,844lkW) + (LA - LG) 

($1,594lkW) + (ALA - ALG) ($@,594lkW)] 

No credit will be allowed to the Seller for loss performance less than that guaranteed. 

The foregoing shall not be construed in any way to limit or negate any other standard guarantee or 

portion thereof which may provide a more comprehensive guarantee than those required by this 

specification. 

10.0 SWITCHGEAR 

The switchgear shall be outdoor metal-clad, of the common sheltered-aisle type, arranged for direct 

connection to the power transformer. 

The metal-clad switchgear will be thoroughly weatherproofed and dust proofed and will include the 

following: 

Interior six-foot strip fluorescent lighting and utility outlet with fuses. The lights shall be controlled by 

dual switches, located four (4) feet above the floor within one (1) foot of each door. 

The base shall be so designed and constructed to prevent rodents and reptiles from entering the 

enclosed space between the switchgear assemble and its foundation. 

PNM interprets ANSI C37.20-6.2.2 as: "No openings between cubicles." All ventilation shall be to the 

outside, not in false work or other cubicles. 

All switchgear bus shall be fully insulated. 

One set of three (3) 12 kV metal oxide station-type lightning arresters connected between the main bus and 

a common ground bar. They are to be mounted so that there is at least 18 inches clearance below the 

lightning arresters for cable installations. Lightning arresters manufactured by General Electric, 

Westinghouse, or Ohio Brass are acceptable. 

10.1 GROUNDING 

Each cubicle shall be provided with one (l) copper ground bar for the grounding of instrumentation, as 

required. This ground bar shall be continuous with provisions outside switchgear for connection to the 

station grounding system. 

Main ground bus shall be continuous throughout switchgear assembly. Ground bus shall have two (2) 

external NEMA 2-hole pads, located at opposite ends of switchgear assembly. 

- 23 -
10.2 EQUIPMENT CONFIGURATION

Hinged, weatherproof (gasketed on all four sides) with a three (3) point latch (one that requires no tools to

operate) all exterior access doors with provisions for padlocking and shall be automatically held open, when

opened 90", until released.

Necessary screened and filtered openings for ventilation so designed and constructed to prevent insects,

rodents, and reptiles from entering.

Switchgear Seller shall not stack breaker cubicles, they will be arranged side by side.

The common aisle shall be a minimum of six (6) feet in width, metal enclosed.

10.3 THROAT

Transformer throat will be supplied by the switchgear Seller. In accordance with PNM Drawing DBD-949

in Appendix 4.

Throat shall be manufactured to mate with throat mount supplied by transformer Seller.

10.4 CONTROLS AND WIRING

Control, current transformer, auxiliary power and alarm circuit wiring shall be 600 volt , at least number 12

AWG, stranded copper conductor with TA, SIS or other approved insulation. All wiring shall be capable of

passing the IPCEA Flame Resisting Test, IPCEA S-61-402, Section 6.5. Hinge-type wiring shall be used

for all connections to swinging panels.

All terminal block points and associated wiring shall be grouped and separated as to low voltage power,

low voltage instrumentation and control, and low-level signal.

All terminal blocks for low voltage control and instrumentation shall be GE Type EB-25 or engineer

approved equal. Short circuiting type terminal blocks shall be provided for current transformer secondary

circuits. All current transformer ratios shall be terminated on one shorting block per phase. Common three

phase terminal blocks will not be allowed. CT wire on the load side of the shorting block shall be of

sufficient length to reach any point on the block to allow ratio change. All wiring shall be connected to

terminal blocks and device studs with insulated, compression barrel, ring-type lugs. All terminal blocks for

power shall be GE Type EB-26 or engineer approved equal.

All terminal blocks shall have at least 20 percent spare positions for use by Purchaser. All blocks shall be

positioned to allow unrestricted access to the terminal points and associated wiring. Sufficient space for all

field cables shall be provided to avoid cable bunching or stacking between the terminal blocks and the

cabinet cable entries.

 EE-RM/STD-00-550 COMMENT 86

10.2 EQUIPMENT CONFIGURATION 

Hinged, weatherproof (gasketed on all four sides) with a three (3) point latch (one that requires no tools to 

operate) all exterior access doors with provisions for padlocking and shall be automatically held open, when 

opened 90", until released. 

Necessary screened and filtered openings for ventilation so designed and constructed to prevent insects, 

rodents, and reptiles from entering. 

Switchgear Seller shall not stack breaker cubicles, they will be arranged side by side. 

The common aisle shall be a minimum of six (6) feet in width, metal enclosed. 

10.3 THROAT 

Transformer throat will be supplied by the switchgear Seller. In accordance with PNM Drawing DBD-949 

in Appendix 4. 

Throat shall be manufactured to mate with throat mount supplied by transformer Seller. 

10.4 CONTROLS AND WIRING 

Control, current transformer, auxiliary power and alarm circuit wiring shall be 600 volt, at least number 12 

A WG, stranded copper conductor with T A, SIS or other approved insulation. All wiring shall be capable of 

passing the IPCEA Flame Resisting Test, IPCEA S-61-402, Section 6.5. Hinge-type wiring shall be used 

for all connections to swinging panels. 

All terminal block points and associated wiring shall be grouped and separated as to low voltage power, 

low voltage instrumentation and control, and low-level signal. 

All terminal blocks for low voltage control and instrumentation shall be GE Type EB-25 or engineer 

approved equal. Short circuiting type terminal blocks shall be provided for current transformer secondary 

circuits. All current transformer ratios shall be terminated on one shorting block per phase. Common three 

phase terminal blocks will not be allowed. CT wire on the load side of the shorting block shall be of 

sufficient length to reach any point on the block to allow ratio change. All wiring shall be connected to 

terminal blocks and device studs with insulated, compression barrel, ring-type lugs. All terminal blocks for 

power shall be GE Type EB-26 or engineer approved equal. 

All terminal blocks shall have at least 20 percent spare positions for use by Purchaser. All blocks shall be 

positioned to allow unrestricted access to the terminal points and associated wiring. Sufficient space for all 

field cables shall be provided to avoid cable bunching or stacking between the terminal blocks and the 

cabinet cable entries. 

- 24-
All auxiliary equipment controls shall be rated for operation on an integral 120-volt AC system. The AC

rated equipment shall operate satisfactorily with a supply voltage regulation of * 10 percent of nominal. All

annunciator and protective equipment controls shall be rated for operation from a purchaser supplied 48-

volt DC supply. All DC rated equipment shall operate satisfactorily with a supply voltage variation

between 42-56 volts.

All external control cables and low voltage power supply cables (AC and DC) shall terminate, by the Seller,

in a weatherproof cabinet mounted on the external end of Unit 1. The cabinet will be referred to as the

TBC (Terminal Board Cabinet). The TBC shall be designed and equipped with all necessary terminal

blocks, including spares for control circuits and power blocks for AC and DC circuits. The TBC shall be so

designed and constructed to prevent moisture condensation. The TBC shall have either full front opening,

single or double door construction with a three (3) point latch with provisions for locking with one (1)

padlock. Minimum TBC size shall be two (2) feet (2') wide by three feet (3') high by twelve inches (12")

deep. Purchaser's conduit will enter bottom of TBC. TBC shall be centered four feet (4') above switchgear

base.

Wiring shall be provided for purchaser supplied battery (48 V, 85 AH) and two (2) battery chargers (6

amp). Adjustable mounting provisions for the chargers shall be made at eye level on the wall of sheltered

aisle opposite Cubicle 1. The DC source, fused at 70 amps, and the AC supply are to be wired to a terminal

block located adjacent to the chargers.

All fuse blocks for control and instrumentation will be of nonflammable ceramic or one-piece bakelite

plastic rated at 600 volts. The holders will be open faced. Pull-block type enclosed holders will not be

accepted.

10.5 TESTS

Certified test reports that the equipment meets the following applicable standards shall be submitted:

ANSI C37.09, test procedure for AC high voltage circuit breakers, Section 09-5, production test (tests and

certification required) on each breaker furnished.

ANSI C37.20c, switchgear assemblies including metal enclosed bus, Section 20-5.3, production tests (tests

and certification required) on all switchgear furnished.

ANSI C57.13, requirements for instruments transformers, Sections 13-4.11 and 13-5.11, routing accuracy

tests (test and certification required) on each transformer.

The Purchaser shall have the right to witness all tests on components, switchgear, and/or breakers. The

Seller shall advise the Purchaser, in writing, ten (10) working days in advance of testing. The Purchaser

reserves the option to waive witnessing testing.

10.6 CURRENT TRANSFORMERS

 EE-RM/STD-00-550 COMMENT 86

All auxiliary equipment controls shall be rated for operation on an integral 120-volt AC system. The AC 

rated equipment shall operate satisfactorily with a supply voltage regulation of * 10 percent of nominal. All 

annunciator and protective equipment controls shall be rated for operation from a purchaser supplied 48-

volt DC supply. All DC rated equipment shall operate satisfactorily with a supply voltage variation 

between 42-56 volts. 

All external control cables and low voltage power supply cables (AC and DC) shall terminate, by the Seller, 

in a weatherproof cabinet mounted on the external end of Unit 1. The cabinet will be referred to as the 

TBC (Terminal Board Cabinet). The TBC shall be designed and equipped with all necessary terminal 

blocks, including spares for control circuits and power blocks for AC and DC circuits. The TBC shall be so 

designed and constructed to prevent moisture condensation. The TBC shall have either full front opening, 

single or double door construction with a three (3) point latch with provisions for locking with one (1) 

padlock. Minimum TBC size shall be two (2) feet (2') wide by three feet (3') high by twelve inches (12") 

deep. Purchaser's conduit will enter bottom of TBC. TBC shall be centered four feet (4') above switchgear 

base. 

Wiring shall be provided for purchaser supplied battery (48 V, 85 AH) and two (2) battery chargers (6 

amp). Adjustable mounting provisions for the chargers shall be made at eye level on the wall of sheltered 

aisle opposite Cubicle 1. The DC source, fused at 70 amps, and the AC supply are to be wired to a terminal 

block located adjacent to the chargers. 

All fuse blocks for control and instrumentation will be of nonflammable ceramic or one-piece bakelite 

plastic rated at 600 volts. The holders will be open faced. Pull-block type enclosed holders will not be 

accepted. 

10.5 TESTS 

Certified test reports that the equipment meets the following applicable standards shall be submitted: 

ANSI C37.09, test procedure for AC high voltage circuit breakers, Section 09-5, production test (tests and 

certification required) on each breaker furnished. 

ANSI C37.20c, switchgear assemblies including metal enclosed bus, Section 20-5.3, production tests (tests 

and certification required) on all switchgear furnished. 

ANSI C57.13, requirements for instruments transformers, Sections 13-4.11 and 13-5.11, routing accuracy 

tests (test and certification required) on each transformer. 

The Purchaser shall have the right to witness all tests on components, switchgear, and/or breakers. The 

Seller shall advise the Purchaser, in writing, ten (10) working days in advance of testing. The Purchaser 

reserves the option to waive witnessing testing. 

10.6 CURRENT TRANSFORMERS 

- 25 -
All current transformers shall comply with ANSI Standard C57.13-1966. All multi-ratio current

transformers shall have all the taps and ratios shown in Table 8 of C57.13-1966 for the corresponding

current transformer rating. No exceptions to this will be allowed. All current transformers shall have a

continuous thermal current rating factor of 2.0 per ANSI C57.13.

10.7 ONE AUXILIARY COMPARTMENT, UNIT 1, Containing:

1 - Raceway (Minimum of 3" x 6" to provide a cable throughway from the rear to the front of

cubicle 1.

1 1,200 amp bus entrance connection.

Control power transformer, 8,400-120/240 volts, 15 kVA, with drawout type current-limiting

fuse and mechanical or key inter locked breaker and fuse. One spare current-limiting fuse shall

also be furnished.

1 120 volt AC supply for highside circuit switcher, fused at 30 amps.

1 - 48 volt DC supply for highside circuit switcher, fused at 50 amps.

1 - 48 volt DC supply to sudden pressure auxiliary relay, fused at 6 amps.

3- Potential transformer, rated 8,400-120 volts, with drawout type current-limiting fuses on the

primary. Include also, three spare current-limiting fuses.

3- Multiratio current transformer, class C200, rated 1,200:5 amps, with all leads terminated to

properly identified shorting-type terminal blocks wired into the transformer differential scheme.

3 - Multiratio current transformer, class C200, rated 1,200:5 amps, with all leads terminated to

properly identified shorting type terminal blocks wired into the watt hour meter.

1 - Recording voltmeter--Bristol one pen model 1U2D530-24-Z7OBX, 90-140 volt range, flush

mounted, 32-day chart #5259, 60 Hz, 115 volt, synchronous motor chart drive.

1 - General Electric watt-hour meter DSW-64, three-element, four-wire, three-phase, with a 15-

minute demand attachment, type M50. Equipped with leads, terminals, and rotor with pinion

for a contract device.

1 - Ammeter (0-1200 amp) and transfer switch.

1 - Voltmeter (0-15 k) volts and transfer switch.

 EE-RM/STD-00-550 COMMENT 86

All current transformers shall comply with ANSI Standard C57.13-1966. All multi-ratio current 

transformers shall have all the taps and ratios shown in Table 8 of C57.13-1966 for the corresponding 

current transformer rating. No exceptions to this will be allowed. All current transformers shall have a 

continuous thermal current rating factor of 2.0 per ANSI C57.13. 

10.7 ONE AUXILIARY COMPARTMENT, UNIT 1, Containing: 

1 - Raceway (Minimum of 3" x 6" to provide a cable throughway from the rear to the front of 

cubicle 1. 

1 - 1 ,200 amp bus entrance connection. 

1 - Control power transformer, 8,400-1201240 volts, 15 kVA, with drawout type current-limiting 

fuse and mechanical or key inter locked breaker and fuse. One spare current-limiting fuse shall 

also be furnished. 

1 - 120 volt AC supply for highs ide circuit switcher, fused at 30 amps. 

1 - 48 volt DC supply for highs ide circuit switcher, fused at 50 amps. 

1 - 48 volt DC supply to sudden pressure auxiliary relay, fused at 6 amps. 

3 - Potential transformer, rated 8,400-120 volts, with drawout type current-limiting fuses on the 

primary. Include also, three spare current-limiting fuses. 

3 - Multiratio current transformer, class C200, rated 1,200:5 amps, with all leads terminated to 

properly identified shorting-type terminal blocks wired into the transformer differential scheme. 

3 - Multiratio current transformer, class C200, rated 1,200:5 amps, with all leads terminated to 

properly identified shorting type terminal blocks wired into the watt hour meter. 

1 - Recording voltmeter--Bristol one pen modellU2D530-24-Z70BX, 90-140 volt range, flush 

mounted, 32-day chart #5259, 60 Hz, 115 volt, synchronous motor chart drive. 

1 - General Electric watt-hour meter DSW-64, three-element, four-wire, three-phase, with a 15-

minute demand attachment, type M50. Equipped with leads, terminals, and rotor with pinion 

for a contract device. 

1 - Ammeter (0-1200 amp) and transfer switch. 

1 - Voltmeter (0-15 k) volts and transfer switch. 

- 26-
1 - 240 volt, two pole, 30 amp breaker connected for customer use.

1 - Control switch mounted in the first cubicle and wired to properly identified terminal blocks for

the high-side circuit switcher. General Electric type SB-1.

3- 87-Percentage differential, inverse time, single-phase relays with harmonic restraint. General

Electric type 12STD15C5A or Westinghouse type HU, Style 290B346A09, wired to trip the 86

auxiliary trip lockout relay.

3- 51-Phase overcurrent relays, wired to trip the 86T auxiliary trip lockout relay. General Electric

type 121AC53A803A or Westinghouse Style 264C901A05, Cat. CO-9H1101N are acceptable.

Current circuit to be wired from transformer phase CT.

51N-Neutral overcurrent relay, wired to trip the 86T auxiliary trip relay. Current circuit to be

wired from transformer neutral CT. GE type 121AC53A803A or Westinghouse style

264C901A05, Cat. No. CO-9H1101N are acceptable.

1 - 86T-Auxiliary trip lockout relay with hand reset for use with 87, 51,and 51N relays, used to trip

and lockout the high side circuit switcher.

2- 49T/X1, X2- Auxiliary over-temperature trip relays. General Electric type 12HFA51B44F.

1 - Underfrequency load shedding relay package as shown in PNM drawing RM-17.

10.8 THREE FEEDER POWER CIRCUIT BREAKER COMPARTMENTS, UNITS 2, 4, AND 6 Each

Containing:

1 - Air circuit breaker, 15 kV, 1,200 amps, 500 MVA interrupting capacity, three-phase drawout

type, with 240 volt AC stored energy closing and 48 volt DC tripping.

3- Current transformer, class C200, 300/600:5 amps, with all leads terminated to properly

identified shorting-type terminal blocks.

1 - Sangamo CCWF-CCVARF demand meter, Cat. #9059074-100, 5 amp, 120 volt, three-phase,

four-wire, 2 1/2 element with 1/3 raised zero, 8-day synchronous motor chart drive, with chart

scale kW/kVAR .75-0-1.5, and with chart speed attachment #99972.

Set PK test blocks (current and voltage for plugging in test meter , wired to disconnect the

CCWF-CCVARF meter only).

3- Thermal ammeter, 0-5 amp with instantaneous element. Sangamo-Lincoln No. 81852 with

scale kit No. 418395-014 for 0-300, 0-600 amp ranges similar to type ADFH.

 EE-RM/STD-00-550 COMMENT 86

1 - 240 volt, two pole, 30 amp breaker connected for customer use. 

1 Control switch mounted in the first cubicle and wired to properly identified terminal blocks for 

the high-side circuit switcher. General Electric type SB-l. 

3 - 87-Percentage differential, inverse time, single-phase relays with harmonic restraint. General 

Electric type 12STD15C5A or Westinghouse type HU, Style 290B346A09, wired to trip the 86 

auxiliary trip lockout relay. 

3 - 51-Phase overcurrent relays, wired to trip the 86T auxiliary trip lockout relay. General Electric 

type 12IAC53A803A or Westinghouse Style 264C901A05, Cat. CO-9HllOIN are acceptable. 

Current circuit to be wired from transformer phase CT. 

1 - 51N-Neutral overcurrent relay, wired to trip the 86T auxiliary trip relay. Current circuit to be 

wired from transformer neutral CT. GE type 12IAC53A803A or Westinghouse style 

264C901A05, Cat. No. CO-9Hl101N are acceptable. 

1 - 86T-Auxiliary trip lockout relay with hand reset for use with 87, 51,and 51N relays, used to trip 

and lockout the high side circuit switcher. 

2 - 49TIXI, X2- Auxiliary over-temperature trip relays. General Electric type 12HFA51B44F. 

1 - Underfrequency load shedding relay package as shown in PNM drawing RM-17. 

10.8 THREE FEEDER POWER CIRCUIT BREAKER COMPARTMENTS, UNITS 2, 4, AND 6 Each 

Containing: 

1 - Air circuit breaker, 15 kV, 1,200 amps, 500 MVA interrupting capacity, three-phase draw out 

type, with 240 volt AC stored energy closing and 48 volt DC tripping. 

3 - Current transformer, class C200, 300/600:5 amps, with all leads terminated to properly 

identified shorting-type terminal blocks. 

1 - Sangamo CCWF-CCV ARF demand meter, Cat. #9059074-100, 5 amp, 120 volt, three-phase, 

four-wire, 2 112 element with 113 raised zero, 8-day synchronous motor chart drive, with chart 

scale kWIkVAR .75-0-1.5, and with chart speed attachment #99972. 

1 - Set PK test blocks (current and voltage for plugging in test meter, wired to disconnect the 

CCWF-CCV ARF meter only). 

3 - Thermal ammeter, 0-5 amp with instantaneous element. Sangamo-Lincoln No. 81852 with 

scale kit No. 418395-014 for 0-300,0-600 amp ranges similar to type ADFH. 

- 27 -
- Circuit breaker control switch with indicating lights. General Electric type SB-l, Style

16SB1B2X16, or Westinghouse type W-2, Style 505A713G01 are acceptable.

Indication lights to be wired to monitor trip bus voltage: Green through a "b" contact, Red to

monitor trip coil.

3- Four-hole NEMA pad for terminating three (3), 15 kV, single conductor, 750 MCM aluminum,

shielded cables.

1 Ground bar for connecting one (1) neutral conductor.

3 - Phase overcurrent relays, General Electric type 121AC77B811A or Westinghouse Style

265C047A07, Cat. #CO-11H111IN are acceptable.

1 Neutral overcurrent relay, General Electric type 121AC53B 81 1A or Westinghouse Style

264C901A07, Cat. CO-9H1111N.

1 - Reclosing relay, General Electric type 12NLR21B2A or Westinghouse type RC, style 1867173,

three adjustable reclosures with time setting of 0-15-60 seconds with toggle cutoff switch.

10.9 TWO FEEDER TIE COMPARTMENTS, UNITS 3 AND 5, Each Containing:

1 Manually operated loadbreak disconnect switch connecting the load side of two adjacent feeder

breakers. The switch shall have a minimum loadbreak rating of 600 amperes.

Provides for locking, if energized buses are accessible with the compartment open. A locking

staple should extend through a slot in the compartment door so that padlock may be used.

External tie-switches are not acceptable.

10.10 ONE SET OF METAL-CLAD SWITCHGEAR ACCESSORIES, Consisting Of, But Not Limited To:

Provisions for mounting equipment necessary for the removal of arc chutes during maintenance (if

applicable).

1 - Breaker handling dolly.

1 - Set secondary couplers.

1 - Breaker maintenance closing device. 1-Arc chute lifter (if required).

1 - Set breaker tools.

 EE-RM/STD-00-550 COMMENT 86

1 - Circuit breaker control switch with indicating lights. General Electric type SB-l, Style 

16SBIB2XI6, or Westinghouse type W-2, Style 505A713GOI are acceptable. 

Indication lights to be wired to monitor trip bus voltage: Green through a "b" contact, Red to 

monitor trip coil. 

3 - Four-hole NEMA pad for terminating three (3), 15 kV, single conductor, 750 MCM aluminum, 

shielded cables. 

1 - Ground bar for connecting one (1) neutral conductor. 

3 - Phase overcurrent relays, General Electric type 12IAC77B811A or Westinghouse Style 

265C047A07, Cat. #CO-llHllllN are acceptable. 

1 - Neutral overcurrent relay, General Electric type 12IAC53B811A or Westinghouse Style 

264C901A07, Cat. CO-9HllllN. 

1 - Reclosing relay, General Electric type 12NLR21B2A or Westinghouse type RC, style 1867173, 

three adjustable reclosures with time setting of 0-15-60 seconds with toggle cutoff switch. 

10.9 TWO FEEDER TIE COMPARTMENTS, UNITS 3 AND 5, Each Containing: 

1 - Manually operated loadbreak disconnect switch connecting the load side of two adjacent feeder 

breakers. The switch shall have a minimum loadbreak rating of 600 amperes. 

Provides for locking, if energized buses are accessible with the compartment open. A locking 

staple should extend through a slot in the compartment door so that padlock may be used. 

External tie-switches are not acceptable. 

10.10 ONE SET OF METAL-CLAD SWITCHGEAR ACCESSORIES, Consisting Of, But Not Limited To: 

Provisions for mounting equipment necessary for the removal of arc chutes during maintenance (if 

applicable). 

1 - Breaker handling dolly. 

1 - Set secondary couplers. 

1 - Breaker maintenance closing device. I-Arc chute lifter (if required). 

1 - Set breaker tools. 

- 28 -
Switchgear Seller shall supply sufficient scotchfill compound for locations where taped joints are used

on the unit. Booted joints are acceptable and preferred by the purchaser.

APPENDIX 1

TRANSFORMER BID DATA

NAME OF BIDDER

In addition to other data and descriptive material furnished with Bidder's Proposal, the Bidder shall fill in all spaces

of the following Bid Data Section. The specifically listed data is in no way intended to limit the data submitted, and

the Bidder is invited to submit all material that he believes necessary to provide a complete description of his

offering.

1. RECEIVING AND INSTALLATION DATA

A. Weight, lbs.

1. Transformer

a. Shipping

b. Installed ---

2. Oil, installed

3. Core and coil assembly, net

4. Tank and fittings, net

5. Heaviest shipping assembly, as shipped

B. Oil, gallons

C. Largest shipping section, 1, w, h, inches

D. Transformer installed dimensions, inches

1. Overall height

2. Overall length

 EE-RM/STD-00-550 COMMENT 86

Switchgear Seller shall supply sufficient scotchfill compound for locations where taped joints are used 

on the unit. Booted joints are acceptable and preferred by the purchaser. 

APPENDIX 1 

TRANSFORMER BID DATA 

NAME OF BIDDER 

In addition to other data and descriptive material furnished with Bidder's Proposal, the Bidder shall fill in all spaces 

of the following Bid Data Section. The specifically listed data is in no way intended to limit the data submitted, and 

the Bidder is invited to submit all material that he believes necessary to provide a complete description of his 

offering. 

1. RECEIVING AND INSTALLATION DATA 

A. Weight,lbs. 

1. Transformer 

a. Shipping 

b. Installed 

2. Oil, installed 

3. Core and coil assembly, net 

4. Tank and fittings, net 

5. Heaviest shipping assembly, as shipped 

B. Oil, gallons 

C. Largest shipping section, 1, w, h, inches 

D. Transformer installed dimensions, inches 

1. Overall height 

2. Overall length 

- 29 
3. Overall width

4. Overall tank height

5. Minimum untanking height, base to crane hook

6. Tank only dimensions; length, width, height

E. Describe parts removed for shipment:

Radiators-Fans-Grounding Resistor and Miscellaneous Minor Access:

II. RATING AND PERFORMANCE DATA

A. Maximum permissible continuous transformer demand at rated voltage and at rated ambient

temperature without exceeding standard hottest-spot temperature for the following conditions:

55°C 65°C

Rise Rise

1. At self-cooled rating, MVA

2. At first stage forced-cooled rating, MVA

B. Positive Impedance, percent H-X

1. Quoted

2. Minimum available without additional cost

3. Base MVA --

4. Tolerance, percent

C. Regulation at 100 percent, 55°C rise, OA load; percent H-X

1. 100 percent power factor

2. 90 percent power factor

3. 80 percent power factor

D. Exciting current, percent

 EE-RM/STD-00-550 COMMENT 86

3. Overall width 

4. Overall tank height 

5. Minimum untanking height, base to crane hook 

6. Tank only dimensions; length, width, height 

E. Describe parts removed for shipment: 

Radiators-Fans-Grounding Resistor and Miscellaneous Minor Access: 

II. RATING AND PERFORMANCE DATA 

A. Maximum permissible continuous transformer demand at rated voltage and at rated ambient 

temperature without exceeding standard hottest-spot temperature for the following conditions: 

1. At self-cooled rating, MV A 

2. At first stage forced-cooled rating, MV A 

B. Positive Impedance, percent H-X 

1. Quoted 

2. Minimum available without additional cost 

3. Base MVA --

4. Tolerance, percent 

C. Regulation at 100 percent, 55°C rise, OA load; percent H-X 

1. 100 percent power factor 

2. 90 percent power factor 

3. 80 percent power factor 

D. Exciting current, percent 

- 30 -

55°C 65°C 

Rise Rise 
1.

2.

3.

4.

95 percent voltage

100 percent voltage

105 percent voltage

110 percent voltage

E. Efficiency at OA rating and 75°C winding temperature, percent

1.

2.

3.

4.

100 percent load 55°C temperature rise rating

75 percent load

50 percent load

25 percent load

F. Guaranteed maximum losses at 75°C winding temperature, kW.

1. No-load losses

a.

b.

c.

105 percent voltage at 2-1/2 percent tap

102 percent voltage at neutral tap

100 percent voltage at neutral tap

2. Total losses at 55°C rise OA/FA or OA/FOA rating assuming 102 percent voltage applied

neutral tap

a.

b.

OA rating (80 percent)

OA/FA or OA/FOA rating (100 percent)

3. Load losses (12R + stray)

a.

b.

At OA rating 55°C temperature rise

At OA/FA or OA/FOA rating 55°C temperature rise

4. Cooling equipment demand at no-load

 EE-RM/STD-00-550 COMMENT 86

1. 95 percent voltage 

2. 100 percent voltage 

3. 105 percent voltage 

4. 110 percent voltage 

E. Efficiency at OA rating and 75°C winding temperature, percent 

1. 100 percent load 55°C temperature rise rating 

2. 75 percent load 

3. 50 percent load 

4. 25 percent load 

F. Guaranteed maximum losses at 75°C winding temperature, kW. 

1. No-load losses 

a. 105 percent voltage at 2-112 percent tap 

b. 102 percent voltage at neutral tap 

c. 100 percent voltage at neutral tap 

2. Total losses at 55°C rise OAIFA or OAIFOA rating assuming 102 percent voltage applied 

neutral tap 

a. OA rating (80 percent) 

b. OAIFA or OAIFOA rating (100 percent) 

3. Load losses (I2R + stray) 

a. At OA rating 55°C temperature rise 

b. At OAIFA or OAIFOA rating 55°C temperature rise 

4. Cooling equipment demand at no-load 

- 31 -
5. Additional cooling equipment demand at top OA/FA or OA/FOA rating (cooling equipment

demand at no load is not to be included)

III. OIL PRESERVATION SYSTEM

Type

IV. LTC

Type

Manufacturer

Contact Replacement Interval (number of LTC operations before contact replacement is necessary)

APPENDIX 2

SWITCHGEAR BID DATA

NAME OF BIDDER

In addition to other data and descriptive material furnished with Bidder's Proposal, the Bidder shall fill in

all spaces of the following Bid Data Section. The specifically listed data is in no way intended to limit the

data submitted, and the Bidder is invited to submit all material that he believes necessary to provide a

complete description of his offering.

RECEIVING AND INSTALLATION DATA

A. Weight, lbs. (total)

1. Cubicles

a. Shipping

b. Installed

c. Heaviest shipping assembly as " shipped"

2. Protected aisle

a. Shipped

 EE-RM/STD-00-550 COMMENT 86

5. Additional cooling equipment demand at top OAIFA or OAIFOA rating (cooling equipment 

demand at no load is not to be included) 

III. OIL PRESERVATION SYSTEM 

Type 

IV. LTC 

Type 

Manufacturer 

Contact Replacement Interval (number of LTC operations before contact replacement is necessary) 

APPENDIX 2 

SWITCHGEAR BID DATA 

NAME OF BIDDER 

In addition to other data and descriptive material furnished with Bidder's Proposal, the Bidder shall fill in 

all spaces of the following Bid Data Section. The specifically listed data is in no way intended to limit the 

data submitted, and the Bidder is invited to submit all material that he believes necessary to provide a 

complete description of his offering. 

I. RECEIVING AND INSTALLATION DATA 

A. Weight, lbs. (total) 

1. Cubicles 

a. Shipping 

b. Installed 

c. Heaviest shipping assembly as "shipped" 

2. Protected aisle 

a. Shipped 

- 32 -
b. Installed

c. Heaviest shipping assembly

3. Breaker

a. Shipped

b. Installed

c. Heaviest Shipping Assembly

B. Largest shipping section, 1, w, h, inches

C. Switchgear installed dimensions, inches

1. Overall height

2. Overall length

3. Overall width

II. RATING AND PERFORMANCE DATA

A. Continuous current rating

1. Main bus

2. Breakers

B. Short circuit current rating

1. Main bus

2. Breakers

APPENDIX 3

SELLER QUALITY PROGRAM REQUIREMENTS

LEVEL B

 EE-RM/STD-00-550 COMMENT 86

b. Installed 

c. Heaviest shipping assembly 

3. Breaker 

a. Shipped 

b. Installed 

c. Heaviest Shipping Assembly 

B. Largest shipping section, 1, w, h, inches 

C. Switchgear installed dimensions, inches 

1. Overall height 

2. Overall length 

3. Overall width 

II. RATING AND PERFORMANCE DATA 

A. Continuous current rating 

1. Main bus 

2. Breakers 

B. Short circuit current rating 

1. Main bus 

2. Breakers 

APPENDIX 3 

SELLER QUALITY PROGRAM REQUIREMENTS 

LEVELB 

- 33 -
1.0 INTRODUCTION

Seller shall establish, implement, and maintain a Quality Program which, as a minimum, includes the

procedural elements listed under paragraph 3.0. Seller's Quality Program shall be subject to surveillance,

evaluation, and verification by Purchaser or its authorized representative at all times during the period of

Purchase Order performance.

2.0 QUALITY PROGRAM

Seller shall maintain a formal Quality Program which describes the methods used to accomplish the

objectives listed under each procedural element. The Quality Program shall describe Seller's organization,

identify those responsible for establishing and implementing it, and identify those Seller personnel

responsible for verifying quality.

3.0 QUALITY PROGRAM ELEMENTS

The following Quality Program procedural elements shall, as a minimum, be addressed in Seller's Quality

Program. The Quality Program shall be established and implemented commencing with Purchase Order

award.

3.1 Procurement Control

Methods for defining design requirements in Seller's purchase orders and subcontracts including changes

thereto.

Methods for performing and documenting receiving inspections and tests.

3.2 Document Control

Methods for reviewing, approving, releasing, and controlling documentation; e.g., drawings, instructions,

procedures, and specifications including any revisions thereof.

3.3 Identification and Control of Material, Parts, and Components

Methods for identifying and controlling materials, parts, and components from receipt through the

fabrication/construction cycle and final delivery.

3.4 Inspection and Test Control

Methods for performing in-process and final inspections and test.

Methods for documenting and evaluating inspection and test results.

 EE-RM/STD-00-550 COMMENT 86

1.0 INTRODUCTION 

Seller shall establish, implement, and maintain a Quality Program which, as a minimum, includes the 

procedural elements listed under paragraph 3.0. Seller's Quality Program shall be subject to surveillance, 

evaluation, and verification by Purchaser or its authorized representative at all times during the period of 

Purchase Order performance. 

2.0 QUALITY PROGRAM 

Seller shall maintain a formal Quality Program which describes the methods used to accomplish the 

objectives listed under each procedural element. The Quality Program shall describe Seller's organization, 

identify those responsible for establishing and implementing it, and identify those Seller personnel 

responsible for verifying quality. 

3.0 QUALITY PROGRAM ELEMENTS 

The following Quality Program procedural elements shall, as a minimum, be addressed in Seller's Quality 

Program. The Quality Program shall be established and implemented commencing with Purchase Order 

award. 

3.1 Procurement Control 

Methods for defining design requirements in Seller's purchase orders and subcontracts including changes 

thereto. 

Methods for performing and documenting receiving inspections and tests. 

3.2 Document Control 

Methods for reviewing, approving, releasing, and controlling documentation; e.g., drawings, instructions, 

procedures, and specifications including any revisions thereof. 

3.3 Identification and Control of Material, Parts, and Components 

Methods for identifying and controlling materials, parts, and components from receipt through the 

fabrication/construction cycle and final delivery. 

3.4 Inspection and Test Control 

Methods for performing in-process and final inspections and test. 

Methods for documenting and evaluating inspection and test results. 

- 34 -
Methods for indicating inspection and test status.

3.5 Measurement and Test Equipment Control (M&TE)

Method for calibrating and controlling M&TE used as an acceptance media.

3.6 Handling, Storage, and Shipping Control

Methods for controlling special requirements for handling, lifting, rigging, storing, shipping, cleaning and

packaging materials, parts, and components.

3.7 Nonconformance Control

Methods for identifying, recording, dispositioning, and controlling nonconforming conditions.

Methods for obtaining and verifying corrective action to preclude repetition.

Methods for obtaining Purchaser or its authorized representative disposition on nonconformances outside

purchase orders or subcontract requirements.

3.8 Records

Methods for initiating, maintaining, controlling, and delivering quality related records.

3.9 Special Process Control

Methods for establishing and maintaining qualified procedures, personnel, and equipment for special

processes such as welding, heat treating, cleaning, nondestructive examination, etc.

3.10 Fabrication/Construction Flow

Seller shall provide to Purchaser or its authorized representative a flow diagram which depicts the complete

construction/fabrication cycle including processing and inspection/testing points. Purchaser or its

authorized representative reserves the right to designate inspection/test "hold points" which shall be

incorporated in the plan at no additional cost to Purchaser.

 EE-RM/STD-00-550 COMMENT 86

Methods for indicating inspection and test status. 

3.5 Measurement and Test Equipment Control (M&TE) 

Method for calibrating and controlling M&TE used as an acceptance media. 

3.6 Handling, Storage, and Shipping Control 

Methods for controlling special requirements for handling, lifting, rigging, storing, shipping, cleaning and 

packaging materials, parts, and components. 

3.7 Nonconformance Control 

Methods for identifying, recording, dispositioning, and controlling nonconforming conditions. 

Methods for obtaining and verifying corrective action to preclude repetition. 

Methods for obtaining Purchaser or its authorized representative disposition on nonconformances outside 

purchase orders or subcontract requirements. 

3.8 Records 

Methods for initiating, maintaining, controlling, and delivering quality related records. 

3.9 Special Process Control 

Methods for establishing and maintaining qualified procedures, personnel, and equipment for special 

processes such as welding, heat treating, cleaning, nondestructive examination, etc. 

3.1 0 Fabrication/Construction Flow 

Seller shall provide to Purchaser or its authorized representative a flow diagram which depicts the complete 

construction/fabrication cycle including processing and inspection/testing points. Purchaser or its 

authorized representative reserves the right to designate inspection/test "hold points" which shall be 

incorporated in the plan at no additional cost to Purchaser. 

- 35 -