November 21, 1997

Contract \# **TW-0928**

SPECIAL SPECIFICATION

SECTION 16461-S

[PADMOUNT TRANSFORMERS]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Description 3

1.02 References 3

1.03 Quality Assurance 3

1.04 Submittals 4

[PART 2 - PRODUCTS]{.underline}

2.01 KVA Ratings 5

2.02 Voltage Ratings And Tap Ratings 5

2.03 Core Design 6

2.04 High Voltage Taps 6

2.05 Transformer Impedances 6

2.06 Short-Circuit Capability 6

2.07 Overcurrent Protection 7

2.08 Construction 7

2.09 Manufacturer 9

2.10 Low Voltage Bushings And Terminals 9

2.11 High Voltage Bushings And Terminals 9

2.12 Accessories 10

2.13 Jacking, Rolling, Lifting, And Mounting Facilities 10

2.14 Terminal Markings 10

2.15 Instruction Nameplate 11

2.16 Oil Preservation 11

2.17 Tanks 11

[PART 3 - EXECUTION]{.underline}

3.01 Installation (Where Applicable) 12

3.02 Identification Tags 12

**3.03
Testing\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\...\.....13**

[PART 4 - EVALUATION]{.underline}

4.01 Loss Evaluation 1~~3~~4

[ATTACHMENTS]{.underline}

SKETCH 'A' Transformer Oil Containment - Plan and Sections for Pad

SPECIAL SPECIFICATION

SECTION 16461-S

[PADMOUNT TRANSFORMERS]{.underline}

# PART 1 - GENERAL

## 1.01 [DESCRIPTION]{.underline}

A. [This specification is written for]{.underline} three-phase, 60
hertz, 65°C temperature rise, liquid filled, self-cooled, pad mounted,
live-front, compartmentalized distribution transformers, rated 1,500 KVA
and below, radial feed.

B. [Pad mounted transformers shall be provided]{.underline} and
installed in accordance with the details and ratings on the working
drawings and in accordance with this specification.

## 1.02 [REFERENCES]{.underline}

A. [American National Standards Institute/]{.underline}

[Institute of Electrical and Electronic Engineer
(ANSI/IEEE)]{.underline}

> C57.12.00 IEEE Standard General Requirements for Liquid-Immersed
> Distribution, Power, and Regulating Transformers.
>
> C57.12.90 IEEE Standard Test Code for Liquid-Immersed Distribution,
> Power, and Regulating Transformers and IEEE Guide for Short-Circuit
> Testing of Distribution and Power Transformers.

B. [American National Standards Institute (ANSI]{.underline})

> C57.12.22 Pad-Mounted, Compartmental-Type Self-Cooled Three-Phase
> Distribution Transformers with High-voltage Bushings, 2500 kVA and
> Smaller; High Voltage 34,500 Grd Y/19,920 Volts and Below; Low
> Voltage, 480 Volts and Below-Requirements.
>
> C57.12.26 Pad-Mounted Compartmental-type, Self-Cooled, Three-Phase
>
> Distribution Transformers for Use with Separable Insulated
> High-Voltage Connectors, High-Voltage, 34,500 Grd Y/19,920 Volts and
> Below; 2500 kVA and Smaller.

## 1.03 [QUALITY ASSURANCE]{.underline}

A. [All characteristics, definitions, terminology, and voltage
designations]{.underline}, except as otherwise specified herein, shall
be in accordance with applicable provisions of the latest edition of
ANSI C57.12.22, or its successors, and applicable ANSI C57 series
specifications including C57.12.00-1987 (or the latest editions).

B. [Manufacturer will state the edition and date]{.underline} of ANSI
C57.12.22 on submittals.

C. [Manufacturer shall provide a warranty]{.underline} on each unit
stating that the unit will be free of defects in workmanship and
material for a period of twelve (12) months from the date of initial
installation or eighteen (18) months from the date of manufacture,
whichever shall occur first.

## 1.04 [SUBMITTALS]{.underline}

[The following shall be submitted]{.underline} in accordance with
Division 1, Section 1300-S, \"Descriptive Submittals.\"

A. Outline drawings including overall height, overall width, overall
depth, base dimensions, arrangement of bushings, and other
appurtenances, and compartment dimensions.

B. Weights of the tank, oil, and total transformer.

C. Volume of oil, gallons.

D. Test and Performance Data.

The manufacturer shall perform the following routine tests as defined in
ANSI C57.12.00-1987 (or the latest edition).

1\. Exciting current at 100% and 110% of rated voltage.

2\. Average excitation loss in accordance with ANSI C57.12.00-1987 (or
the latest edition), Section 9, paragraph 9.3, and Table 18, line 3.

3\. Average total loss in accordance with ANSI C57.12.00-1987 (or the
latest edition), Section 9, paragraph 9.3, and Table 18, line 3.

4\. Percent impedance volts, of the low voltage winding with respect to
the high voltage winding at rated self cooled kVA.

5\. Steady state transformer top oil temperature rise above ambient,
degree Celsius.

6\. Transformer oil time constant, time for top oil to obtain 63% of
steady state rise above ambient.

7\. Certified statement of compliance with short circuit capability
requirements of Paragraph 2.06.

8\. Certification of tamper resistant design with complete test data.

9\. Certified high and low voltage impulse data.

E. Production Test Data

1\. The manufacturer shall perform all routine tests as defined in ANSI
C57.12.00-1987 (or the latest edition).

2\. The manufacturer shall perform production line high voltage and low
voltage impulse tests on each unit as defined in ANSI C57.12.00-1987 (or
the latest edition).

3\. The manufacturer shall provide Sandia with the following
[certified]{.underline} data by transformer serial number for each
transformer shipped.

a\. Excitation loss, watts.

b\. Impedance, % Z.

c\. Total loss, watts @ 85º C.

F. Manufacturer shall certify that all transformers supplied under this
specification contain less than 1 ppm PCB.

G. All required information and laboratory test performance data per
Section 3.1.2 of \"EEI Finishing Guidelines for Padmounted Equipment,\"
Draft 6.

H. No individual transformer shall be shipped with losses that exceed
quoted losses by more than the tolerances in ANSI C57.12.00-1987 (or the
latest edition), Table 18, line 2, without written approval of Sandia
National Laboratories/New Mexico (SNL/NM).

# PART 2 - PRODUCTS

## 2.01 [KVA RATINGS]{.underline}

Kilovolt-ampere ratings shall be 75, 150, 300, 500, 750, 1000, or 1500.

## 2.02 [VOLTAGE RATINGS AND TAP RATINGS]{.underline}

Voltage ratings, minimum BIL rating, and tap ratings shall be in
accordance with Table 1, below.

> [TABLE I]{.underline}

+------------+--------+---------------+-----------+--------------------+
| High       | BIL    | Low Voltage   | kVA       | High Voltage Taps  |
| Voltage    |        |               |           | Required           |
| Rating     | Rating | Rating        | Rating    |                    |
| (Volts)    | (KV)   | (Volts)       |           |                    |
| Delta      |        |               |           |                    |
|            |        | Wye           |           |                    |
+------------+--------+---------------+-----------+--------------------+
| 2,400      | 45     | 208Y / 120    | 75 - 1500 | 2½% Above & Below  |
+------------+--------+---------------+-----------+--------------------+
| 2,400      | 45     | 480Y / 277    | 75 - 1500 | 2½% Above & Below  |
+------------+--------+---------------+-----------+--------------------+
| 4,160      | 60     | 208Y / 120    | 75 - 1500 | 2½% Above & Below  |
+------------+--------+---------------+-----------+--------------------+
| 4,160      | 60     | 480Y / 277    | 75 - 1500 | 2½% Above & Below  |
+------------+--------+---------------+-----------+--------------------+
| 12,470     | 95     | 208Y / 120    | 75 - 1500 | 2½% Above & Below  |
+------------+--------+---------------+-----------+--------------------+
| 12,470     | 95     | 480Y / 277    | 75 - 1500 | 2½% Above & Below  |
+------------+--------+---------------+-----------+--------------------+

## 2.03 [CORE DESIGN]{.underline}

[Transformers shall be of five-legged core design]{.underline} and
connected delta-wye. A fully insulated, neutral bushing will bring the
secondary winding neutral to the outside of the tank and a ground pad
will be provided on the outside tank wall and will be connected to the
neutral bushing with a removable ground strap.

## 2.04 [HIGH VOLTAGE TAPS]{.underline}

[High voltage taps]{.underline} shall be provided in accordance with
Table I. Taps shall be suitable for de-energized operation only. The tap
changer switch shall be ganged and shall be externally operable. The
operating handle shall be located either in the high voltage compartment
above the primary bushings or in the secondary compartment above the low
voltage bushings. The tap changer shall be set on the 100% tap at the
factory and shall be secured to prevent inadvertent change from this
position.

## 2.05 [TRANSFORMER IMPEDANCES]{.underline}

[Minimum impedances]{.underline} shall be in accordance with Table II
below:

> [TABLE II]{.underline}

  ------------------------ ----------------------- -----------------------
  Secondary Voltage                                

  \*Minimum AC Impedance %                         

                                                   

  KVA                      208Y / 120              480Y / 277

  75                       2.9                     2.6

  150                      3.0                     2.6

  300                      4.7                     2.6

  500                      4.7                     4.3

  750                      5.75                    5.75

  1,000                    5.75                    5.75

  1,500                    N/A                     5.75

                                                   
  ------------------------ ----------------------- -----------------------

\*ANSI Standard Tolerance (±7.5 %)

## 2.06 [SHORT-CIRCUIT CAPABILITY]{.underline}

A. [Mechanical short-circuit capability]{.underline} shall be
demonstrated by design compliance with ANSI C57.12.90-1987 (or the
latest edition).

B. [Thermal short-circuit capability]{.underline} shall be demonstrated
by design compliance with ANSI C57-12.00-1987 (or the latest edition).

## 2.07 [OVERCURRENT PROTECTION]{.underline}

[Overcurrent protection devices shall]{.underline} not be supplied in
radial feed transformers.

## 2.08 [CONSTRUCTION]{.underline}

A. [Description]{.underline}

1\. Transformers shall be designed to protect people against accidental
contact of energized parts, discourage unauthorized access to or
climbing upon the unit by the public and protect against weather.

2\. The pad mounted transformer shall consist of the transformer tank,
high-voltage cable terminating compartment, and the low-voltage cable
terminating compartment. The transformer tank and compartment shall be
assembled as a rain tight compartment, outdoor, and tamper-resistant
integral unit suitable for mounting on a flat surface. The transformer
design shall not use gasketing to meet this requirement.

3\. There shall be no exposed screws, bolts, or other fastening or
hinging devices (other than the pentahead bolt specified in 2.08 D.5)
which are externally removable. There shall be no opening through which
foreign objects such as sticks or wires might be inserted to contact
energized parts. Suitable means for padlocking the compartment door(s)
shall be provided. Normal entry shall be possible only with the use of
proper access tools.

4\. The high- and low-voltage compartments shall be located side by side
on one side of the transformer tank. When facing the compartment, the
low voltage compartment shall be on the right.

5\. Construction of the unit shall be such that it can be lifted,
skidded, and slid into place on the mounting pad without disturbing the
entrance cables.

6\. All external surfaces shall be constructed of steel, 13 USS gauge or
thicker.

7\. The transformer and compartment hoods shall be crowned to insure
water run off or manufactured with a full weather cover.

B. [Bottom Protection]{.underline}

1\. The transformer tank base shall be raised above the pad to protect
the bottom finish during installation and to minimize corrosion due to
moisture accumulation. The base shall be cross braced to permit rolling
in two directs.

2\. All external surfaces of ferrous material used in the construction
of the assembly shall have undercoating over the regular finish, applied
to the bottoms of the components and extending up the side to a point
one to two inches above the bottom of their bases in a straight edge.

C. [Protective Coating]{.underline}

1\. All coated surfaces both exterior and interior shall be painted
using a system which conforms to the requirements of \"EEI Proposed
Finishing Guidelines for Padmounted Equipment,\" Draft 6. The finish
coat shall be light gray (ANSI Color No. 70).

D. [High- and Low-Voltage Compartments]{.underline}

1\. Terminal compartments shall be full height, air-filled compartments
with separate hinged doors. The compartments shall be completely
isolated from each other by a steel barrier without opening or
discontinuity of any kind.

2\. The edges of the access doors and hoods shall be formed to provide a
close fitting mating surface, with internal insertion-prevention lip
that will be shaped to resist entry or prying by screwdrivers, wrecking
bars, tire irons, single-socket lug wrenches or other readily accessible
tools.

3\. Hinges and hinge pins shall be passivated American Iron and Steel
Institute Type 304 stainless steel or equivalent corrosion-resistant
metal.

4\. There shall be a threaded fastening device for the high voltage
door, accessible only through the low voltage compartment. Screen door
latches with wing nuts, gravity hooks, etc., are acceptable. The
low-voltage compartment door shall have a minimum of three point
latching and the handle shall have provisions for padlocking.

The padlocking provision shall be so designed and located as to resist
prying or breaking off by screwdrivers, wrecking bars, tire irons,
single-socket lug wrenches, or other readily accessible tools and to
inhibit removal of the padlock with a bolt cutting device or hacksaw.

5\. In addition to the regular locking provision above, the access doors
shall be secured by a captive, recessed pentahead bolt as depicted in
Figure 11, ANSI C57.12.26-1987 (or the latest edition). Bolts and
associated hardware must be rust and corrosion resistant and the design
shall minimize the possibility of misalignment and cross-threading. The
design must be such that wire entry through the bolt hole into the
compartment(s) is prohibited when the bolt is removed. The non-rotating
cup shall be permanently attached.

a\. The captive pentahead bolt shall be coordinated with the latch and
padlock to prevent unlatching and insertion of the padlock into the hasp
when and until the bolt is completely threaded, respectively.

b\. The captive pentahead shall also function as an interlock device to
pin the latch closed.

6\. Both compartment doors shall be equipped with stops for holding each
door in a 90° open position. The stops shall be captive to prevent loss
of the device.

7\. Doors on the high- and low-voltage compartments shall be of
sufficient size to provide adequate working space when open.

8\. The bottom edge of the transformer shall provide for flush mounting
on a flat rigid surface to prevent wire entry into the high- or
low-voltage compartments.

E. [Maximum Size]{.underline}

Transformer sizes shall not be larger than the "A" and "B" dimensions on
the transformer oil containment pad Sketch 'A'.

## 2.09 [MANUFACTURER]{.underline}

[Padmount transformers manufactured]{.underline} by ABB Company, General
Electric, Cooper Industries, Howard Industries, or Square D Company.

[Substitutions]{.underline}: only under provisions of Section 1600-S.

## 2.10 [LOW VOLTAGE BUSHINGS AND TERMINALS]{.underline}

A. [Electrical characteristics]{.underline} of completely assembled
low-voltage terminations shall comply with Table 3 of ANSI C57.12-1987
(or the latest edition) unless otherwise stated herein.

B. [All low voltage terminals shall be]{.underline} insulated from the
tank with 1.2 KV class bushings. Terminals of low-voltage windings shall
be arranged to the [specific]{.underline} dimensions shown in Figure 2
and 3 (a) ANSI C57.12.22-1989 (or latest edition). In line arrangements
are unacceptable.

C. [The low-voltage neutral shall be]{.underline} a fully insulated
bushing. A ground pad shall be provided. A removable copper ground strap
shall be provided and connected between the neutral bushing and ground
pad. The ground strap shall be capable of carrying a line to ground
fault of the magnitude and duration defined in ANSI C57.12.00-1987 (or
latest edition).

D. [Low-voltage terminals shall]{.underline} be 2-hole spades with NEMA
hole spacing to provide the number of holes given in Table III.

> [TABLE III]{.underline}
>
> Secondary Terminals

  ------------------- ------------------- ------- ------- ------- ------- ------- --------
                      [Transformer kVA                                            
                      Size]{.underline}                                           

  Secondary Voltage   75                  150     300     500     750     1000    1500

  208Y / 120          4                   6       6       8       8       8       N/A

  480Y / 277          4                   6       6       6       6       8       8
  ------------------- ------------------- ------- ------- ------- ------- ------- --------

## 2.11 [HIGH VOLTAGE BUSHINGS AND TERMINALS]{.underline}

A. [Bushings arrangement]{.underline} for live front, radial feed
transformers shall comply with the latest revision of ANSI
C57.12.22-1989.

B. [High voltage bushings]{.underline} are to be made of wet-process
porcelain and clamped externally to the wall of the transformer.
Reusable nitrite rubber gaskets shall seal the bushing to the tank wall
in the terminals to the porcelain.

C. [Transformer sizes]{.underline} of 75-1500 KVA, shall have 2-hole
blade terminals with 9/16-in. (14.30 mm) diameter holes, with NEMA hole
spacing.

D. [High-voltage cable terminals shall be]{.underline} oriented for
vertical take-off of primary cables entering the compartment from below
in accordance with Figure 4, ANSI C57.12.22-1989.

E. [Transformer design shall allow]{.underline} field replacement of
high voltage bushing wells and low voltage bushings by means of common
hand tools and oil handling equipment, without totally untanking the
transformer.

## 2.12 [ACCESSORIES]{.underline}

A. [The following accessories are required]{.underline} on all
transformers and located in the low- voltage compartment in such a
manner as to not interfere with low-voltage terminals:

1\. Pressure relief device.

2\. Upper filter valve or plug.

3\. One-inch combination drain, lower-filter valve, and sampling device.
Combination drain plug and sampling device may be substituted.

B. [The following accessories are required]{.underline} on all
transformers rated 500 KVA and above located in the low-voltage
compartments, above terminals:

1\. Liquid level gauge.

2\. Top oil thermometer.

## 2.13 [JACKING, ROLLING, LIFTING, AND MOUNTING FACILITIES]{.underline}

A. [Suitable jack bosses or equivalent]{.underline} jacking facilities
shall be provided on the tank. Vertical clearance for jack shall be 1½
inches (38.1 mm) minimum, 3½ inches (88.9 mm) maximum.

B. [Transformer base shall be]{.underline} arranged for rolling in two
directions: parallel to and at right angles to the center line of the
high-voltage bushings.

C. [Lifting lugs shall be]{.underline} adequately strengthened, sized,
and arranged on the tank to provide a suitable lift for the completely
assembled unit.

D. [A 3/4 inch (19.05 mm) minimum and 1½ inch (38.1 mm) maximum integral
flange shall]{.underline} be provided at the base of the high-voltage
and low-voltage compartments, to provide means of anchoring the unit to
the pad.

## 2.14 [TERMINAL MARKINGS]{.underline}

> [External terminals]{.underline} on radial feed transformers shall be
> marked H1, H2, H3, and X0, X1, X2, and X3 by stenciled white or yellow
> lettering on the tank.

## 2.15 [INSTRUCTION NAMEPLATE]{.underline}

A. [Instruction nameplate shall]{.underline} be located on the inside of
the low-voltage compartment door.

B. [Instruction nameplate shall contain]{.underline} the information
specified in paragraph 5.12 of ANSI C57.12.00-1987 (or latest edition).

C. [Nameplate shall indicate]{.underline} that the transformer oil
contained less than 1 ppm PCB at time of manufacture.

D. [A winding diagram]{.underline} with high- and low-voltage
connections shall be shown on the instruction nameplate.

## 2.16 [OIL PRESERVATION]{.underline}

[Transformers shall be of sealed tank construction,]{.underline} so
designed that the interior is sealed from the atmosphere and the gas
plus oil volume remains constant. The transformer shall remain
effectively sealed for all temperatures to plus 105°C top oil.

## 2.17 [TANKS]{.underline}

The tank will be of sufficient strength to withstand a pressure of 7 psi
(48.26 kPa) gage, without permanent distortion.

A. [Welded main cover]{.underline} construction shall be provided.
Access to internal connection for test purposes shall be provided by
means of a hand hole, accessible only from the padlocked compartments.

B. [Tank grounding provision]{.underline} shall consist of:

> 1\. 500 KVA and below - two steel pads, each with a 1/2 inch (12.7 mm)
> 13 NC tapped hole, 7/16 inch (11.13 mm) deep.
>
> 2\. Above 500 KVA - two unpainted copper-faced steel or
> stainless-steel pads, 2 inches x 3½ inches (50.8 mm x 88.9 mm) each
> with two holes spaced on 1¾ inch (44.45 mm) centers and tapped for 1/2
> inch (12.7 mm) - 13 NC thread. The minimum thickness of the copper
> facing shall be 0.015 inch (.381 mm). Minimum threaded depth of holes
> shall be 1/2 inch (12.7 mm).

C. [These ground pads]{.underline} shall be welded on the transformer
base or on the tank wall near the base, one in the high-voltage
compartment and one in the low-voltage compartment.

# PART 3 - EXECUTION

NOTE: This section is applicable to the construction contractor
installing the transformer.

## 3.01 [INSTALLATION]{.underline}

A. [Transformer shall be installed]{.underline} on a concrete pad as
shown on contract drawings. Handling of the transformer shall be in
accordance with manufacturer\'s instructions.

B. [Touch up]{.underline} scratched or marred surface to match original
finish.

C. [Two-hole compression cable connectors]{.underline} shall be used on
the primary and secondary cables. They shall be crimped only with the
approved manufacturer's recommended tool.

  ----------------------- ---------------------- ------------------------
                                                 

                                                 

                                                 

                                                 
  ----------------------- ---------------------- ------------------------

**D**. [Energization of primary circuits and transformer shall
be]{.underline} in accordance with Division 16, Section \"Primary System
Safety Requirements\" and contract drawings.

**E**. [Upon energization of the transformer]{.underline}, the phase
rotation shall be verified and secondary voltages measured, line-to-line
and line-ground, on all phases.

## 3.02 [IDENTIFICATION TAGS]{.underline}

[All transformers]{.underline} shall have 3¼\" (82.55 mm) high intensity
reflective black on yellow labels, manufactured by \"Electromark\",
Catalog \# Intens - 3.0 - KY - [X]{.underline} (where X is the letter or
digit ordering). The labels shall read \"TF-XXXX-Y\"; X will indicate
building number and Y will indicate its number at the building site.
Refer to construction drawings for exact transformer number.

# 3.03 TESTING

> A. [The following electrical tests shall be performed prior to
> energization by others.]{.underline} The SDR shall be notified to
> coordinate and schedule the electrical testing.
>
> 1\. Perform insulation-resistance tests, winding-to-winding, and
> winding-to- ground \[(high-low and ground) and (low-high and ground)\]
> utilizing a megohmeter with test voltage output as follows:
>
> [Transformer Insulation-Resistance Test Voltages]{.underline}

+-----------------------+-----------------------+-----------------------+
| Transformer           | Minimum DC            | Recommended           |
|                       |                       |                       |
| Coil Reading          | Test Voltage          | Minimum Insulation    |
|                       |                       |                       |
|                       |                       | Resistance            |
|                       |                       |                       |
|                       |                       | in Megohms            |
+-----------------------+-----------------------+-----------------------+
| 0-600 volts           | 1,000 volts           | 100                   |
+-----------------------+-----------------------+-----------------------+
| 600-5,000 volts       | 2,500 volts           | 1,000                 |
+-----------------------+-----------------------+-----------------------+
| 5,000-15,000 volts    | 5,000 volts           | 5,000                 |
+-----------------------+-----------------------+-----------------------+

> 2\. Perform a turns-ratio test (TRT) between windings at all tap
> positions.
>
> 3\. Sample insulating oil and perform a dielectric breakdown voltage
> test.
>
> B. [The following visual and mechanical inspections shall be performed
> on each transformer prior to energization:]{.underline}
>
> 1\. Inspect for physical damage, cracked insulators, leaks, tightness
> of connections, and general mechanical and electrical conditions.
>
> 2\. Check tightness of accessible bolted electrical connections.
>
> 3\. Verify proper liquid level in tank.

# PART 4 - EVALUATION

## 4.01 [LOSS EVALUATION]{.underline}

A. [Transformers bid under this specification]{.underline} will be
evaluated for no load losses and load losses using the present worth
method. Each type of loss is associated with a demand charge and an
energy charge. The present value of carrying charges associated with
each of the charges are multiplied by the appropriate loss figure
supplied by the manufacturer for each unit then added to the each unit
bid transformer price to obtain the total evaluated cost (TEC) per unit:

> TEC = T\$ + PVDC x NLL + PVEC x LL; where:

TEC = Total Evaluated cost

T\$ = Unit bid transformer price, \$

PVDC = Present worth value of demand charges per kilowatt of no load
losses, \$/KW.

PVEC = Present worth value of energy charges per kilowatt of load
losses, \$/KW.

NLL = Transformer no load losses, KW.

LL = Transformer load losses, KW.

> Current Values:
>
> PVDC = \$10,099.00
>
> PVEC = \$ 5,114.00

B. In the event actual losses exceed the losses guaranteed, SNL shall
have the right to either reject the equipment or to accept the equipment
for a reduced price. The amount due SNL shall be calculated as follows:

Price Reduction = (NLLA - NLLQ) x PVDC +(LLA - LLQ) x PVEC; where:

NLLA = Actual transformer no load losses, KW.

NLLQ = Quoted transformer no load losses, KW.

LLA = Actual transformer load losses, KW.

LLQ = Quoted transformer load losses, KW.

END OF SECTION

ATTACHMENT

SKETCH 'A'

Transformer Oil Containment Pad Dimensions