SUPPLIES OR SERVICES AND PRICES/COSTS

[ITEM]{.underline} [DESCRIPTION]{.underline} [QUANTITY]{.underline}
[U/I]{.underline} [UNIT PRICE]{.underline} [AMOUNT]{.underline}

Battery Chargers for Gering Substation: 130 volt, 50 ampere DC output,
1‑phase 240 volt AC input source, FOB Destination, with documentation,
in accordance with the attached specifications, delivered to Gering, NE.

001 2 EA \$\_\_\_\_\_\_\_ \$\_\_\_\_\_\_\_\_\_\_\_

OFFERING:

Manufacturer\'s name

Model/Type

1\. GENERAL: The chargers shall conform to the latest edition/revision
of National Electrical Manufacturers\' Association (NEMA) Standards
Publication No. PE-**5** (Utility Type Battery Chargers) and any
standards referenced therein. In the event of contradiction between NEMA
or NEMA-referenced standards and these requirements, the requirement
that provides for a safer, quieter, and better designed and built
charger shall apply.

2\. ALTERNATING CURRENT INPUT: Nominal system voltage is 240 volts AC,
1-phase, with a [+]{.underline}**10** percent variation in input voltage
allowed. Frequency will be 60 Hertz with variation allowed as in
referenced NEMA standards. The battery charger shall operate at a
minimum 80 percent efficiency and at a 70 percent or better power factor
at full load.

3\. DIRECT CURRENT OUTPUT: The battery charger shall be part of a **58**
cell, 130 volt battery system. The battery to be charged will have an
eight-hour rating of approximately 8‑10 times the charger rating
specified.

> a\. Voltage: The voltage regulation shall be [+]{.underline} 0.5
> percent over a load range of 1 to 100 percent. Battery charger design
> shall provide for float voltage control from 124.7 - 136.3 volts and
> equalize (a.k.a. "high rate") voltage control from 127.6 - 142.1
> volts.
>
> b\. Current Limiting: The current limiting circuit shall be adjustable
> from at least 90 - 110 percent. Full output (i.e., 100 percent)
> current rating of each charger shall be **50** Amperes
>
> c\. Parallel Operation: The charger shall be capable of parallel
> operation with two compatible battery chargers connected in parallel,
> and without interconnecting control wiring.
>
> The parallel battery chargers shall also be capable of load sharing
> (with interconnecting wiring) any load from 0 amps load to full rated
> current such that the difference between two parallel chargers shall
> be no more than 20 percent of the sum of the combined rated charger
> output currents (e.g., if each charger\'s rated full output is 50
> Amperes, then the difference could not exceed 20 Amperes \[20% of
> 50+50\]).
>
> In addition, all parallel and load-shared chargers shall be free from
> output current instability (hunting) from 15 percent of rated output
> current up to full rated output.
>
> Any single charger (when operating either in parallel or load sharing
> with another charger) shall continue to operate without interruption
> or failure in the event that its counter part fails.
>
> d\. Stand-Alone/No Load Sharing: Chargers shall each be capable of
> operating in a \"stand-alone\" mode (no load sharing - one charger
> \"OFF," one charger \"ON\"), even with the load sharing wiring
> connected.
>
> e\. Effect of Altitude: The charger shall provide the full rated
> output at an altitude of 5,000 feet above sea level (and lower), with
> an ambient air temperature range of 0 to 50 degrees C.

4\. PROTECTION: The AC input shall be protected by a properly sized
circuit breaker. The DC output shall be protected by a properly sized
two-pole circuit breaker. Both the AC input and the DC output circuits
shall be protected from surge and transient voltage and current
occurrence, including that related to powering-up the charger from a
\"cold\" start (no previous charge on surge and filter capacitors).

5\. COMPONENTS/CAPABILITIES: Battery charger design must incorporate the
following components/capabilities:

> a\. Filtering & Battery Eliminator Capability: Charger output ripple
> shall be limited to 30 millivolts rms whether connected to the battery
> or disconnected from the battery. Each charger must be able to operate
> effectively with the battery disconnected from the system. In
> addition, the charger shall be capable of a \"soft start\" automatic
> startup with a resistive load only (i.e., battery disconnected).
>
> b\. Battery Eliminator Capability: The charger must be able to operate
> effectively with the battery disconnected from the system. In
> addition, the charger shall be capable of a \"soft start\" automatic
> startup with a resistive load only (i.e., battery disconnected).
>
> c\. Battery Discharge Protection: Circuitry shall prevent the battery
> from discharging back through the charger in the event of: AC power
> failure, being turned OFF, or other charger shutdown situations.
> Extremely low current requirements of load-side powered controls need
> not be considered as a cause of battery discharge.
>
> d\. AC Pilot Lamp/LED: This lamp (or LED) shall be a continuous-duty
> type providing an indication of energized AC input.
>
> e\. Float Level Control: Float voltage level control shall be obtained
> utilizing a variable control, e.g., potentiometer or microprocessor
> system equivalent.
>
> f\. Equalize Level Control: Equalize voltage level control shall be
> obtained utilizing a variable control, e.g., potentiometer or
> microprocessor system equivalent.
>
> g\. Equalize "Timer Switch" and Lamps/LEDs/LCD display: This control
> device shall comprise a O to 24 hour timer (wider range is acceptable)
> with an automatic return to float mechanism and operational mode
> indicator lamps/LEDs. Equalize mode is to be manually operator
> selected, and is NOT to occur automatically after loss and restoration
> of the AC power source.
>
> h\. Automatic Charger Restart: Each charger shall restart (in float
> mode) automatically upon loss and restoration of the AC input power.
>
> i\. Battery Temperature Compensation: Each battery charger shall be
> provided with temperature compensation that varies the charger
> [float]{.underline} voltage (measured at the battery terminals) to
> compensate for [battery]{.underline} temperature variations from
> 77 degrees F (25 degrees C) per the following equations from the GNB
> Absolyte IIP Installation and Operating Instructions, dated 9/97:
>
> V corrected = V77°F **-** ((T actual **-** 77°F) x (0.003V/°F)) or
>
> V corrected = V25°C **-** ((T actual **-** 25°C) x (0.0055V/°C))
>
> Each charger shall provide the proper voltage for the **58** cell
> 130 volt battery. Each charger shall be provided with a remote (for
> mounting on the battery) sensor, complete with 50 feet of insulated
> jacket shielded cable per sensor. The sensor will be connected by the
> customer to the negative post of a middle cell, using the intercell
> terminal connection bolt, washer, and straps provided by the battery
> manufacturer. A type of sensor using an adhesive is NOT acceptable.
>
> Use/non-use of the temperature compensation circuit shall be customer
> selectable (IN or OUT), by a switch, jumper, or software equivalent.
>
> j\. Meters: DC ammeter and DC voltmeter (either analog or digital
> display types) shall be accurate within one percent of full scale.
>
> k\. Terminal blocks: Terminal blocks for external wiring to the alarm
> relay contacts and the alarm timer shall be rated with at least 600
> volt insulation and 5 amperes. The blocks shall be molded-block
> barrier type and accommodate ring lugs for #16 AWG wire.
>
> Arrangement and location of the blocks shall be such that incoming and
> outgoing cables can be supported and all wiring to the blocks shall be
> completely accessible without having to remove other devices for
> accessibility.

6\. SUPERVISORY CONTROLS/CHARGER ALARMS: The following alarms, or their
equivalents, shall be integrated into each battery charger circuitry, as
described in NEMA PE-5, and as additionally required herein.

> a\. Charger Failure Alarm (a.k.a., Rectifier Failure Alarm): Isolated
> form \"C\" contacts shall be provided to indicate a battery charger
> failure, such as tripped circuit breaker, overvoltage shutdown, and no
> output voltage.
>
> b\. Low DC Voltage Alarm: Isolated form \"C\" contacts for alarm
> indication when DC output voltage falls below a (customer adjustable)
> preset level. The minimum voltage adjustment range for pickup and
> dropout shall be 98.6 to 127.6 volts.
>
> c\. High DC Output Voltage Alarm Relay: Isolated form \"C\" contacts
> for alarm indication when DC output voltage rises above a (customer
> adjustable) preset level. The minimum voltage adjustment range for
> pickup and dropout shall be 127.6 to 145 volts.
>
> d\. AC Power Failure Alarm: Isolated form \"C\" contacts for alarm
> indication in case of low AC input voltage or interrupted AC input.
>
> e\. Low Direct-Current Alarm: If this alarm is provided, it shall be
> capable of being blocked (or not used) by the Customer.
>
> f\. Indicator Lamps/LEDs: Each alarm shall also activate individual
> long-life indicator lamps/LEDs to indicate alarm condition. Light
> emitting diodes (LEDs) and microprocessor system LCD displays are
> acceptable forms of indicating lamps.

7\. MECHANICAL DESIGN REQUIREMENTS: The battery charger shall be
designed for Ventilation Class 1 (i.e., natural convection cooling,
without fans). Adequate ventilation openings shall be provided to allow
mounting the charger back up to 6 inches from a wall and with both sides
against other equipment.

> The cabinet shall be constructed to facilitate floor mounting. The
> footprint of these battery chargers shall not exceed 28\" X 32\". The
> charger cabinets shall be freestanding for anchoring to the floor
> only.
>
> Conduit knockouts shall provide a minimum 1.5-inch inside diameter in
> the appropriate conduit fitting, and accommodate the sizes and numbers
> of incoming and outgoing cables. Cutouts and removable cover plates or
> conduit knockouts shall be provided at cable entry points. A ground
> lug/pad shall be provided for bonding the charger to the building
> ground mat, via a customer provided #4 AWG copper cable.

8\. PAINT: The battery charger cabinet shall be finished, inside and
outside, and painted the manufacturers\' standard painting system.
Alternatively, if the manufacturer's enclosure is made of is
non-corrosive metal (e.g., a non-corrosive type of anodized aluminum),
no painting is required.

9\. AUDIBLE NOISE: The charger shall be operated under all conditions of
line voltages, output voltage, and load current to determine the
conditions which produce the highest audible sound level. This highest
audible noise level of a single charger (excluding ambient noise) shall
be less than 65 dB (+/- 2 dB meter accuracy) at a distance of **five**
feet from any charger surface, over the frequency range of 32 to
10,000 Hz (i.e., "**C weighting curve**"). The contribution of the
charger shall be extracted from the total noise (ambient plus charger)
using:

L~chgr~ = 10 log (10^(total\ level/10)^ -
10^(Level\ with\ chgr\ off/10)^)

> \[ e.g. for total level = 70 dB and level with charger off = 65 dB,

L~chgr~ = 10 log (10^(70/10)^ - 10^(65/10)^)

L~chgr~ = 10 log (10^(7)^ - 10^(6.5)^) = 68.35 dB

10\. INPUT, OUTPUT, AND RADIO FREQUENCY NOISE: The conducted and
radiated electromagnetic interference (EMI) of individual chargers shall
conform to NEMA PE-5.

> 11\. TESTING: The equipment to be furnished on this contract shall
> have met all of the requirements of the design and production tests
> described in NEMA PE-**5.** Test reports documenting the results of
> these tests shall be included in the final documentation (i.e.,
> instruction manuals.)
>
> 12\. DOCUMENTATION: The drawings and data required under this purchase
> order include form, fit, and function data, and manuals, instructional
> material, and other drawings and data needed by the Customer for the
> installation, operation, and routine maintenance. These drawings and
> data are included in the term "instruction manual."
>
> a\. One set of nameplate, catalog sheets and outline drawings are
> required for review **before** award of contract.
>
> b\. Two sets of instruction manuals and drawings shall be shipped with
> each pair of chargers.

13\. WARRANTY: Each charger shall be warranted to be free of defect in
workmanship and material for at least one year from the date of
delivery, or the manufacturer\'s warranty period, whichever is longer.

14\. ACCEPTANCE: Acceptance of all work and effort under this contract
shall be accomplished by the Contracting Officer, the DOE Contracting
Officer\'s Representative (COR), or duly designated representative.
After delivery of the battery charger, the Government will inspect the
equipment to verify that there has been no damage to the equipment
during shipment. Payment will be authorized only after acceptance.

16. DELIVERY REQUIREMENTS:

The contractor shall ship the chargers and instruction manuals for
Gering Sub "F.O.B. Destination" prepaid to:

Western Area Power Administration

ATTN: Steve Smith

1030 U Street

Gering, NE 69341

Delivery of the chargers is required by no later than July 15, 2003.

> The contractor\'s cost of shipping shall be included in the quoted
> price. Items shall be delivered between the hours of 7:00 am to 4:30
> pm Monday through [Thursday]{.underline} excluding Government
> holidays. Shipper is to coordinate delivery by contacting Steve Smith
> at 1-308-436-2889.
>
> Preservation, packaging, and packing for shipment or mailing of all
> work deliverable shall be according to good commercial practice and
> adequate to insure acceptance by common carrier and safe
> transportation. The contractor shall provide itemized packing lists
> that enumerate the specific contents of each shipping container with
> the equipment.
>
> Responsibility for risk of loss of or damage to supplies shall remain
> with the Contractor until, and shall pass to the Government upon,
> delivery of the supplies to the destination. However, if supplies are
> rejected due to failure to conform to the contract requirements, the
> risk of loss or damage remains with the Contractor until cure or
> acceptance.

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