Attachment A - Specifications Keswick KX1E Final 3-3-21 REV 2.pdf

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ATTACHMENT-A

Specifications

WAPA

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WESTERN TRANSFORMER REQUIREMENTS AND SPECIFICATIONS

Table of Contents

ATTACHMENT A, PART 1 - WESTERN GENERAL TRANSFORMER SPECIFICATIONS (REVISED FOR

SMALL TRANSFORMER PROCUREMENT)

1.1 GENERAL:

1.2 TAP CHANGERS:

1.3 SURGE ARRESTERS:

1.4 BUSHINGS:

1.5 TERMINAL CONNECTORS:

1.7 WINDINGS:

1.8 CORE:

1.9 OIL PRESERVATION EQUIPMENT:

1.10 TANK:

1.11 BASE:

1.12 ACCESSORIES/OPTIONS:

1.14 CONTROL CABINETS AND TERMINAL BOXES:

1.15 TERMINAL BLOCKS:

1.16 CONTROL WIRING:

1.17 INSULATING OIL:

1.18 FACTORY ASSEMBLY AND TESTS:

1.19 TOOLS AND APPLIANCES:

1.20 PAINTING:

1.21 SPARE PARTS:

1.22 ELECTRICAL DRAWINGS AND DATA:

1.23 REFERENCE DRAWINGS AND DATA:

ATTACHMENT A, PART 2 - OPERATING CONDITIONS AND TRANSFORMER RATINGS

2.1 OPERATING CONDITIONS: GLEN CANYON SUBSTATION

2.2 BUSHING LOCATIONS:

2.3 TEMPERATURE RISE FOR EQUIPMENT:

2.4 VOLTAGE RATINGS, CURRENT RATINGS, BIL RATINGS AND DESIGN IMPEDANCE

ATTACHMENT A, PART 3 – OTHER REQUIREMENTS

3.1 PLACE OF DELIVERY:

3.2 SERVICES OF ERECTING ENGINEER(S):

3.4 POST AWARD FACTORY MEETING:

3.5 IMPACT RECORDER AND SWEEP FREQUENCY RESPONSE ANALYZER REPORTS

3.6 PACKING LISTS

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ATTACHMENT A, PART 1 - WESTERN GENERAL TRANSFORMER SPECIFICATIONS

1.1 GENERAL:

The Contractor shall furnish the transformer complete with tank-mounted surge arresters, insulating oil, features, and accessories as specified. All material necessary for the operation of the transformer shall be provided.

Unless otherwise specified in this solicitation, transformer shall be designed and manufactured in accordance with the latest applicable standards including American National Standards Institute (ANSI), Institute of Electrical and Electronics Engineers, Inc. (IEEE), be in accordance with IEEE C57 Series Standards, National Electrical Manufacturers Association (NEMA), American Society for Testing and Material (ASTM), and specifically IEEE C57.12.00. Only new equipment of current and present day manufacture shall be furnished.

The transformer, including bushings and all accessories, shall operate within all loading and temperature rise limitations of the “Guide for Loading Oil-Immersed Power Transformers with 65°C Average Winding Rise” in accordance with the latest IEEE C57.91 as applicable. Transformer minimum clearances f rom live parts shall be in accordance with Table 124-1 of the latest IEEE C2.

In the event of contradictory requirements between IEEE standards and these requirements, the terms of these requirements shall apply. Transformer shall have the full MVA rating at the specified substation elevation. The Contractor’s erecting engineer shall make all the arrangements to send empty nitrogen bottles and any other items that need to be returned to the required return location.

Bolts, nuts, washers, and locknuts outside the transformer tank shall be galvanized or stainless steel.

1. FALL PROTECTION:

Non-skid paint shall be applied to the top of the transformer tank cover. Non-skid paint shall not be applied to tank access covers, bolts, nuts, and other removable hardware.

1.2 TAP CHANGERS:

1. EXTERNALLY OPERATED FIXED TAPS: The transformer shall be furnished with an externally-operated manual tap changer to be operated only when the transformer is de-energized. The tap changer shall meet or exceed the latest requirements of IEEE C57.131. The tap changer shall be designed for convenient operation by a person standing on the same level as the transformer base. It shall include an operating lever or hand wheel, tap position indicator, and a means for locking the tap changer in any tap position. The locking device shall be arranged to prevent locking the tap changer in an of f-tap position and shall be suitable for use with a standard-size padlock.

1.3 SURGE ARRESTERS:

The surge arresters shall meet all applicable requirements of the latest IEEE C62.11, shall be metal oxide, porcelain or polymer station type, and shall meet the following specifications:

1. They shall be mounted on the transformer tank with the base at least 8.5 feet above the transformer base except as otherwise required. Metal oxide station-type arresters are acceptable as long as they meet all the requirements of this specification.

1. Each station-type arrester unit shall be provided with a pressure-relief diaphragm to prevent explosive shattering of the porcelain housing. Color of the arrester shall be gray. One surge arrester is to be supplied for each external winding terminal on each transformer, for all voltages that are required to be furnished on the equipment.

2. The surge arresters shall have sufficient mechanical strength to withstand, without damage, the mechanical forces that will be imposed on the equipment and meet the same seismic requirements as stated for the associated transformer that the surge arresters are mounted on.

3. The surge arresters shall be tank mounted for maximum protection of the equipment. Surge arresters for this transformer shall provide protective margins equal to or better than those listed in Part 2 - Table C.

1.4 BUSHINGS:

The bushings shall be porcelain type, manufactured by PCORE or ABB, and shall conform to the latest ANSI/IEEE C57.19.00 and C57.19.01. The bushings shall be located on the transformer in accordance with Attachment A, Part 2, paragraph 2.2 and the bottom of each bushing shall be a minimum of 8.5 feet above the base of the transformer.

All porcelain used in bushings shall be wet process, homogeneous, and free f rom cavities or other f laws. The glazing shall be gray, uniform in color, and free f rom blisters, burns, and other defects.

Each high-voltage bushing shall have a capacitance tap for use with a bushing potential device having a burden as shown in Table 3-4 of the latest NEMA Publication No. SG 4. Porcelain parts of each bushing rated below 450-kV BIL shall be of one piece.

1.5 TERMINAL CONNECTORS:

1. Terminal connectors shall be furnished on each 115-kV and neutral bushing and the 115-kV surge arrester as follows:

a. All bushings and all surge arresters shall be furnished with NEMA Standard CC1, 4-hole type terminal pads.

2. For the low voltage terminals, an air-f illed terminal chamber shall be supplied which is metal enclosed with bolt on end panels for accessibility to the terminal connections. This shall accommodate bottom cable entry and be sized for single feed with clamp type terminals

1.7 WINDINGS:

Winding conductors shall be copper, shall be f ree f rom scale, burrs, and splinters, and shall be insulated with paper. Permanent current-carrying joints or splices shall be mitered and welded or brazed, properly formed, finished, and insulated, except that compression-type fittings may be used outside of the core winding.

The transformer core and coil assemblies shall be power class, round core/circular coil design and construction. High voltage and low voltage windings for the main core/coil assembly shall be either disk or helical construction; layer/barrel windings are not acceptable. All windings shall be either rectangular magnet wire or continuous transposed cable. Western prefers the use of Weidmann Systems International for insulation components used in transformers which includes insulation boards, insulation paper, various insulation components, high temperature NOMEX winding insulation, and Weidmann wire products for the construction of the windings. Insulation on winding conductors used in the coil process shall be cellulose insulating paper. It shall be wound onto the conductor employing a spinning process. The paper insulation shall be applied in single or multiple strands such that a minimum of 30% of the paper surfaces are overlapped to provide for a continuous insulating surface. Sufficient tension shall be maintained on the paper strands so as to prevent loose wraps. If clamping rings are utilized in the transformers design, full circumference rings shall be used. Core and coils shall be dried using a vapor phase system prior to oil filling.

Transformer shall utilize conductor and lead insulation of specially treated paper to maintain the required tensile, bending, and bursting strengths; to increase the thermal stability of the insulation;

and to insure normal life expectancy.

The completed winding assembly shall be securely held in place so that there will be no disarrangement or deformation by stresses caused by shipping.

1.8 CORE:

Nuts, bolts, and clamps of the core assembly shall be provided with positive locking devices to prevent loosening by vibration or change of shape or position during transportation or operation. The core shall be securely grounded to the tank. An external core ground, via an external core bushing, shall be provided to allow testing the core ground without exposing the internal parts to possible contamination. The core ground shall be connected to the tank with a detachable connector and the assembly shall be enclosed with a removable cover. The manufacturer shall demagnetize the core just prior to shipping transformer(s).

1.9 OIL PRESERVATION EQUIPMENT:

The oil preservation system provided shall operate under the pressure limitations outlined under paragraph 1.10 (Tank) without loss of inert nitrogen gas or dry air over the entire temperature range specified. The use of auxiliary apparatus to compress or chill the gas will not be permitted.

Suf ficient nitrogen gas, if required, shall be furnished for the initial f lushing, f illing, and operation of the transformer. The Contractor’s erecting engineer shall return these cylinders to the required return location as soon as the nitrogen bottles are empty and no longer needed for installation.

Transformer(s) shall be equipped with the following system of oil preservation as defined in the latest

IEEE C57.12.80:

1. SEALED TANK SYSTEM: Paragraph 3.387.

1.10 TANK:

The shell, cover, and bottom of each tank, including auxiliary tanks, shall be of welded steel plate construction with all seams welded so as to remain oil-tight and gastight. During welding of the transformer cover, an inorganic gasket shall be permanently located between the cover and the tank f lange to prevent weld spatter from entering the tank. Flanged horizontal joints which must be broken to untank the core and coil shall be designed for breaking and remaking in the f ield. The tanks, except auxiliary tanks vented to the atmosphere, shall be capable of withstanding, without leakage or permanent distortion, an internal pressure of 15-pounds-per-square-inch gauge and of withstanding a vacuum which produces a differential pressure of 15 pounds per square inch across the tank wall. Auxiliary tanks shall be capable of withstanding a differential pressure of 15 pounds per square inch. All flanged joints shall be provided with gaskets set in machined grooves to prevent over compression of the gaskets. The gaskets shall be of resilient material which will not deteriorate under the action of hot oil and will remain oil-tight. Unless otherwise approved by the Contracting Of f icer, all piping connections shall be made with f langed joints. Flanges shall be welded to pipe sections and bolted together with suitable gaskets. All valves shall be mounted to the tank with f langed connections.

Stif feners required for the tank shall be selected and arranged in order to minimize the collection of dirt particles, rain, or snow.

Lugs and jacking pads shall be provided for moving and lifting the transformer either by crane or by jacks. Jacking pads shall be suitable for jacking the complete transformer filled with oil. The jacking pad dimensions shall be shown on the transformer outline drawing.

The construction of the main tank, auxiliary tanks, and the oil-preservation apparatus shall be such as to insure an adequate cushion of gas in applicable parts of the apparatus for the following conditions:

1. INTERNAL GAS PRESSURE: The internal gas pressure shall be not less than 0 pounds per square inch nor more than 5 pounds per square inch, with transformer temperature changes attained between de-energized condition and up to 110 percent maximum rated load condition with an ambient air temperature range as required in these specifications, paragraph 2.1.

2. LOSS OF GAS OR OIL: The system shall operate without the loss of oil and without the loss of the seal between the transformer interior and the atmosphere over the entire temperature range specified f rom minus 20 degrees C to plus 55 degrees C and the entire range of operating conditions. The main transformer tank shall be constructed to withstand the range f rom full vacuum to the maximum oil pressure that will be exerted during oil f illing, oil processing, and vacuum processing to remove moisture and to withstand all operating conditions f rom de-energized up to 110 percent of maximum rated load.

1.11 BASE:

The transformer tanks shall be provided with a fabricated structural-steel base. The base shall be provided with pulling eyes to permit pulling the transformer. The base shall be designed and built so as to allow skidding or moving on rollers in either direction. Flat plate bases without internal or external reinforcing structural members are not acceptable.

Transformer bases shall be designed to permit anchoring to the concrete foundation by means of welding to embedded steel members to be furnished by the Government. The Contractor shall show, on an informational outline drawing, the location, size, type, and lengths of anchor plates and weld patterns, including foundation loads for each anchorage assembly and the foundation overturning moment, so that the Government can complete its foundation design in advance of shipment. These information drawings shall be provided per Table A.

1.12 ACCESSORIES/OPTIONS:

The contacts of all relays, gauges, control devices, and thermometers shall be insulated from ground and shall be of a positive, snap-action type. Mercury-type relays and contacts are not acceptable. All relays and contactors shall be provided with covers. Contacts should close for abnormal conditions and shall be wired to terminal blocks for external cabling to control room building. Each of these contacts shall be rated for 125 V dc.

All gauges and meters shall be calibrated in United States Standard designation; i.e., pounds per square inch, etc. All nameplates and designation labels shall be in the English language.

Transformer(s) shall be equipped with the following listed accessories (Items 1 – 13):

1. SUDDEN PRESSURE RELAY: A separate sudden pressure relay complete with seal-in relay shall be provided for each transformer. The relay shall be a Qualitrol type Model 900-010 or equal and shall be mounted to the transformer with a full-flow ball valve. The seal-in relay shall be a Qualitrol Model 909-300-01 or equal. The relays shall be actuated by sudden pressure rise inside the main tank and shall not operate on gradual pressure change within the normal operating range of the transformer.

The sudden pressure relay and auxiliary relay shall be mounted in such a way that mechanical vibration, such as that due to a close-in fault, will not cause false operation of the relay scheme.

A control switch shall provide 4 electrically separate contacts. This switch shall be an Electroswitch 24202B or equal, with oval handle and have two positions labeled “TRIP ENABLED” at 12 o'clock and “TRIP DISABLED” at 1 o'clock. At least two electrically separate Closed contacts in the “TRIP ENABLED” position, one contact wired to supervise tripping of the lockout trip coil f rom the output of the sudden pressure seal-in relay, and one contact wired to terminal blocks. At least one Closed contact in the “TRIP DISABLED” position for alarm indication wired to terminal blocks.

A lockout relay shall be mounted in the transformer control cabinet type Electroswitch 78PB05D or equal with 125vdc trip coil, LED indicator lights, and oval handle. The lockout relay is to be tripped by sudden pressure seal-in relay supervised by Sudden Pressure Cutout Switch (see section for the switch), critical liquid temperature, and critical low oil level. The lockout relay control circuit 125vdc supply is biased positive wetting voltage to the trip contacts of sudden pressure, liquid temp, and low oil, and negative being the common point of the lockout relay trip coil. The positive and negative of the 125vdc lockout relay control circuit is wired to terminal blocks. Trip coil trouble contact is to be wired to terminal blocks.

The lockout relay will have the following electrically isolated contacts wired to terminal blocks:

2 Closed in the "TRIP" position that are cut-out by the Maintenance Test Switch (see Maintenance Test Switch section)

6 Closed in the "TRIP" position

A maintenance test switch shall be mounted below the lockout relay of type Mega Power Systems UTS1 CT 100 or equal with 10 individual knife blades, black handles, and clear cover. The f irst 2 positions of the test switch shall be wired to supervise contacts of Lockout Relay (see Lockout Relay section). The top of the knife blade shall be wired to the Lockout Relay contact, and the bottom of the knife blade shall be wired to the terminal block.

2. PRESSURE-RELIEF DEVICE ON THE MAIN TANK: The device shall be self-resetting, without the use of expendable parts. The device shall have directed oil f low. The device, and all parts thereof , shall have a service life comparable to that of the transformer of which it is a part.

Semaphore and alarm contacts shall be provided on the device to give visual and electrical indication of operation. The pressure relief device shall be in the Messko MPreC series (or equal) and sized for the transformer.

3. OIL INLET VALVE: The oil inlet valve shall be 1 inch minimum size ball valve and shall be mounted parallel to the ground near the top of the tank to facilitate the connecting of the oil line.

4. LIQUID THERMOMETER: The dial-type liquid thermometer gauge/relay (26 Q) shall have adjustable alarm and trip contacts set at 90°C and 95°C, respectively, for 55°C temperature rise, or as recommended by the transformer manufacturer. The liquid thermometer shall provide a 0- 1 mA analog output for use with a SCADA system. The preferred type of device shall include a Qualitrol Series 104-400 device or a Messko TRASY2 device.

5. OIL LEVEL GAUGE: This device shall have one low-level contact for alarm and one additional lower-level (critical level) contact for tripping.

6. OIL DRAIN VALVE: This valve is to be furnished with oil sampling device and shall be a ball type.

7. DIAGRAMMATIC NAMEPLATE: Nameplate information shall be etched, stamped, or engraved into the metal of the nameplate and this nameplate shall be sun and fade resistant. The nameplate should meet the requirements and include all the information as required by IEEE C57.12.5.12, Table 6 as well as the seismic rating.

8. PRESSURE-VACUUM GAUGE

9. GROUNDING PADS AND CABLE: Two grounding pads (per ANSI standards) on and near the base of each transformer tank and terminal connectors suitable for 4/0 AWG through 500 kcmil copper cable for each pad, shall be provided. In addition, one grounding pad and terminal connector shall be mounted on the transformer tank near the base of each set of arresters and the neutral bushing. The Contractor shall provide bare copper cable, neatly supported, from each of the two grounding pads at the base of the transformer tank up to the arresters and neutral bushing pads interconnected at the top of the tank. The minimum size of copper cable to be furnished for the transformers is 4/0 AWG copper cable.

10. VACUUM CONNECTION: The vacuum valve shall be 1 inch minimum size ball valve, be separate f rom the oil fill valve and be mounted on or near the top of the transformer.

11. PRESSURE VACUUM BLEEDER.

12. A MINIMUM OF TWO CIRCULAR, BOLTED MANHOLE (HANDHOLE) COVERS SHALL BE

PROVIDED: They shall be located such that they are accessible without the removal of any other equipment. Manholes (Handholes) shall be constructed with f lush handles to reduce tripping hazard when working on the transformer cover.

13. LIFTING LUGS FOR LIFTING THE COMPLETE OIL FILLED TRANSFORMER

1.14 CONTROL CABINETS AND TERMINAL BOXES:

The Contractor shall furnish and install one control cabinet for the transformer.

Control cabinet shall be provided with a hinged, gasketed cover and a gasketed removable plate in the bottom which can be drilled in the field for conduits. The removable plate shall be arranged such that it can be removed and replaced from the inside of the cabinet so that conduits can be stubbed into the cabinet with the plate removed and then the punched plate can be lowered over the conduits.

External circuits will enter the bottom of the cabinet through exposed, weather-tight rigid conduit.

Cabinet shall be NEMA Type 4.

The height, width, and depth of the cabinet, and the bottom of the cabinet to the base of the transformer dimensions, shall be shown on the outline drawing of the transformer.

1. CONTROL CABINET: Control cabinet shall contain the following unless otherwise noted:

a. Copper grounding bar, 1 inch wide and 1/4 inch thick and long enough to terminate all ground connections, but not less than 12 inches long for control cabinets (also provided with at least 20 drilled and tapped holes equipped with 10-32 screws). The bar shall be located in a convenient position near the terminal blocks for grounding of cable shields and grounded conductors of incoming control and power cables.

b. See paragraph 1.23 which, for informational purposes only, shows the grounding methods of cables to be furnished by others. Shielded cable grounding shall be in accordance with the standard drawings.

c. Terminal blocks to terminate cabling in control cabinets.

d. Terminal blocks for terminating the wiring from transformer accessories.

e. The control cabinet shall have a socketed DC voltage monitor relay of type KRPA-11DN-110 or equal, 110-125vdc coil, AgCdO contacts, with indicator light, and 2 Form-C relay output contacts. The coil of the relay should be wired to pick up 125vdc lockout relay control circuit.

1 Form-C output contact is wired to terminal blocks.

f. An LED light equipped with a safety shield shall be provided to adequately illuminate the interior of control cabinets. An automatic pushbutton light switch actuated by opening the cabinet door shall be provided to control the light. The light shall be connected to a separately fused 120 V ac supply circuit.

g. One (1) or more single-phase heaters shall be mounted in each control cabinet to prevent condensation. The heaters shall not be located in cable wiring areas so as not to damage incoming cables or other equipment and shall be provided with guards for the protection or personnel. The electric power for the heater circuit shall be thermostatically controlled with provisions for disconnecting the ac power source. Heaters shall be rated for single phase, 60 Hz, 240 VAC. Heaters shall NOT to be mounted on the bottom plate.

h. A weatherproof, separately fused, 20-ampere, 120-volt, 2-pole, 3-wire, polarized, duplex, grounded receptacle outlet with a built-in ground-fault circuit interrupter connected to a 120 V ac supply shall be furnished and mounted on the outside of each control cabinet so that it is available for use without opening the control cabinet door. The interrupter shall automatically interrupt the circuit for ground fault currents of 5 milliamperes or greater and shall interrupt dangerous ground fault currents within 1/30 of a second. Each receptacle shall have a test button to check the operation of the interrupter and a reset button that moves to a trip-indicating position upon operation of the interrupter. Receptacles shall have NEMA standard configuration 5-20R, shall f it in a standard single-gang box, and shall be furnished with a cast-metal weatherproof cover plate having a spring-loaded, gasketed lif t cover.

Receptacles shall be Pass and Seymour Catalog No. 2091, or equal.

1.15 TERMINAL BLOCKS:

Terminal blocks for control wiring shall be rated at least 600 V and 25 amps; shall be suitable for use with No. 10 AWG wire; shall be molded-block type to accommodate ring lugs 1/2 inch wide (outer diameter) at the terminal screws; shall be furnished with binding-head or washer-head screws having serrated or grooved contact surfaces or having lock washers; and shall be furnished with molded insulating barriers between terminals. Each terminal block shall have a removable marking strip.

Examples of terminal blocks meeting the above requirements are:

1. Marathon Catalog No. 1512 STD.

2. General Electric Company Type EB25B12.

The arrangement and location of the blocks shall be such that incoming and outgoing cables can be supported. Adjacent rows of terminal blocks shall be separated at least 6 inches, edge-to-edge, and shall be at least 6 inches from sides, top, or bottom of cabinet for all wiring which will be made in the f ield. Wiring which will be done at the factory may be made in a space which is not less than 3 inches instead of the preceding 6 inch space requirement, provided that the factory wiring will not share common space with the field wiring.

1.16 CONTROL WIRING:

Control wiring shall be performed with switchboard-type, No. 14 AWG, Class K stranded, copper conductor, rated for 600 V service, with NEC Type SIS insulation.

Terminations of wire shall be made with pre-insulated, pressure-crimp-type terminal connectors with ring lugs. Terminations at locations not suitable for ring lugs shall be made with pre-insulated, pressure-crimp-type terminal connectors with tin plated copper tube ferrules. Exposed wiring shall be kept to a minimum and, where used, shall be formed into compact groups bound together and f irmly supported and shall be run straight, horizontally, or vertically with short radius right-angle bends. Hinge wiring shall be twisted around the longitudinal axis of the wire, wherever possible, instead of being bent laterally. Each wire shall be protected from abrasion where it leaves a channel or duct. There shall be no splices in the wiring, and all connections shall be made at device studs or terminal blocks. There shall be no more than two wires terminated at each terminal point. No. 8 AWG wiring, or smaller, shall be terminated at terminal blocks. Wiring larger than No. 8 AWG shall be connected into terminals that provide a barrier such as the EPDB512 from AutomationDirect.

1.17 INSULATING OIL:

1. GENERAL: All electrical equipment shall be designed to operate with oil which conforms to the requirements of the latest revision of ASTM D 3487, “Mineral Insulating Oil Used in Electrical Apparatus”, except that for oil-f illed bushings the manufacturer’s standard insulating oil is acceptable. Electrical equipment with insulating liquids containing polychlorinated biphenyls (PCB) is not acceptable. Equipment (including each bushing identified by its serial number) requiring insulating oil shall be permanently marked and certification furnished to certify that there are no PCBs present when the equipment is manufactured. If the oil is shipped separately, the Contractor shall also furnish certification that the oil meets the EPA requirements or the State requirement (whichever is more stringent) for no-PCB when the oil is delivered to Western. The oil truck driver shall have in his possession and furnish this certification to Western upon arrival at the delivery site.

2. SAMPLING AND TESTING: Certif ied results of tests which demonstrate compliance with ASTM D 3487 and these specifications shall be furnished.

Copies of certified report of the tests shall be furnished as required by the (Drawings and Data to Be Furnished by the Contractor) paragraph.

Western will test a sample of the oil directly from the shipping container at Western’s receiving facility to demonstrate that the following requirement is met:

Type of Test ASTM Method Test Limit

Dielectric Strength D 877 30-kV minimum

3. DELIVERY: The oil shall be delivered to the required delivery location in accordance with solicitation requirements.

1.18 FACTORY ASSEMBLY AND TESTS:

The transformer shall be completely assembled at the factory and shall be subjected to the following tests, by and at the expense of the Contractor, in accordance with ANSI/IEEE C57 unless otherwise indicated. Test instrument requirements shall be in accordance with ANSI C39.1 for 0.25-percent accuracy or shall be in accordance with National Bureau of Standards Technical Note 1204. Prior to testing, the transformer oil shall be circulated through the transformer oil pumps and heat exchangers

– if installed.

The Contractor shall furnish, as a part of the report on factory tests, sample calculations and the formulas used in determining the results of the tests. The reports furnished and submitted to the Government as proof of the impulse test withstand shall include hard copies of all test results showing overlay of before and after test waves. The transformer(s) shall not be shipped until all factory tests have been performed to the satisfaction of the Government.

1. IMPULSE TEST: These tests shall be performed in accordance with IEEE C57.12.90, paragraphs 10.2 and 10.3, on each terminal of the transformers, including the neutral, in the presence of the Government inspector if available. Ungrounded terminals not being tested may be protected by a gap providing the gap does not flash over during the test. The Contractor may perform any other impulse tests desired after the initial reduced-wave and prior to the last two chopped-wave and the final full-wave tests.

No impulse testing shall be performed after the test is accepted. Ground current measurements in accordance with paragraph 10.3.4.1 of IEEE C57.12.90 also shall be made and the method used for detection of insulation failure shall be the comparison of waves. Simultaneous oscillograms shall be taken of the impulse voltage applied to the tested terminal and, except for the chopped-wave tests, the voltage f rom a suitable shunt connected to measure neutral or ground current. The records for the reduced wave and f inal full wave shall have identical amplitudes to aid failure detection by superimposing the oscillograms of the test waves. The minimum height of each individual trace (at maximum deflection) shall be 30 mm. The criteria for failure detection shall be in accordance with IEEE C57.12.90, paragraph 10.3.4.

2. INSULATION POWER FACTOR TEST: Insulation power factor shall be measured in accordance with IEEE C57.12.90, paragraph 10.10.

3. DOBLE SURGE ARRESTOR TESTS: All surge arresters shall have Doble tests performed before unit shipment and test results documented and submitted per paragraph 1.22.4.

4. APPLIED POTENTIAL TEST: At either 50 Hz for 72 seconds or 60 Hz for 60 seconds.

5. PHASE-TO-PHASE INSULATION TEST: A phase-to-phase low f requency test in accordance with IEEE C57.12.00, Table 6 is required on 3 phase transformer rated below 115-kV.

6. NO-LOAD LOSS: No-load loss by the average-voltage voltmeter method to be made af ter the impulse test. Accuracies required for measuring losses shall be in accordance with IEEE C57.12.90, paragraph 9.4.

7. EXCITING CURRENT: The Contractor shall also provide a calculated exciting curve of percent voltage versus percent exciting current for a range of 90 to 140 percent of rated voltage. Test values shall be used, when available, for the range from 90 to 110 percent of rated voltage.

8. IMPEDANCE INCLUDING LOAD LOSS: Load loss tests shall be made for the base loading condition as given in these specifications. Tests may be made at 50 Hz. Impedances measured at 50 Hz shall be converted to 60 Hz values.

If the Contractor cannot provide enough power or power factor for the total transformer to be tested, the Contractor shall test high-voltage, low-voltage, and tertiary-voltage windings individually (if present) and simulate loading conditions as closely as possible to the loading condition specified and total the losses from the individual tests to obtain results equivalent to a 3 phase test of the transformer.

The certif ied reports of the tests performed under this paragraph and subparagraph 9 below, shall include the values for the loading condition given under “Failure to Meet Warranted Characteristics”, clause of the solicitation/contract.

9. TOTAL LOSSES: Total loss data shall be furnished for the base loading condition. If tests performed under subparagraph 8 above were made at 50 Hz, the load loss shall be adjusted to 60 Hz by the following formula: adjusted load loss equals 1.05[I2R+(1.44) (stray loss at full load)].

The total losses to be used for actual loss evaluation will be the sum of the 60 Hz load loss (by test or adjusted) and the no-load loss. These tests shall be made with the tap-changing equipment in the neutral position.

10. TEMPERATURE RISE: Certified test results will be acceptable if previously performed on a thermally duplicate transformer. Temperature rise tests shall be made with tap-changing equipment in the nominal voltage tap positions.

11. RESISTANCE MEASUREMENTS: Resistance measurements of all windings on the rated voltage connection and at the tap extremes.

12. RATIO TESTS: Ratio tests on the rated voltage connection and on all tap connections.

13. POLARITY TESTS: Polarity (and phase-relation tests) on the rated voltage connection. Includes phase-relation tests for 3 phase transformers.

14. ZERO SEQUENCE IMPEDANCE TEST: Perform a zero sequence impedance test: or alternatively, provide certification on the test report by the manufacturer, that zero sequence impedances are equal to corresponding positive sequence impedances values.

15. INDUCED POTENTIAL AND INTERNAL IONIZATION TESTS: Internal ionization tests on each high-voltage winding shall be made at the voltages stated below. The method of measurement and calibration shall be according to IEEE C57.12.90, paragraphs 10.7, 10.8, and 10.9. The test voltage may be induced within the transformer under test rather than applied by a separate transformer. Three phase transformers shall be excited from a 3 phase source. Single phase transformers shall be excited f rom a single phase source. The tests required on transformers rated 115-kV and above are as follows:

Induced (phase-to-ground) Test Voltage at the High Voltage Terminal, (Percent of Maximum Operating Voltage)

Maximum Radio Inf luence Voltage at the High-Voltage Terminal, Micro-volts

First Level - 170 percent No measurement required

Second level - 150 percent 100 micro-volts including background*

*Momentary bursts of 150 micro-volts (background peak level) will be permitted provided that the source of the bursts is external to the transformer. Such proof must be provided by utilizing the ultrasonic scheme described in IEEE Transaction Paper No. 31TP65-66, or equivalent method.

The maximum operating voltage is 1.05 times rated voltage. The induced voltage level at 170 percent of maximum operating voltage should be held for a minimum duration of 5 seconds followed by a reduced test level of 150 percent of maximum operating voltage to be held constant without interruption for a period of 1 hour.

16. BUSHING TESTS:

Design Tests: The Contractor shall furnish certification that each type, style, and model bushing furnished has passed the test requirements of IEEE C57.19.00. The Contractor shall supply the acceptable range of Doble Power Factor Test Data particular to each bushing furnished for the Government’s use in the future testing of the bushings.

Production Tests: Each apparatus bushing rated 92-kV and above shall be subjected to the production tests in accordance with IEEE C57.19.00. The tests may be performed prior to installation in the equipment.

17. TANK LEAK TEST: Tank leak test at the maximum operating tank pressure but not less than 5-pounds-per-square-inch gauge.

18. SEISMIC QUALIFICATION: When seismic qualification is required, data and requirements shall be provided in accordance with the latest IEEE 693. The data, required by the standards, to be listed on metal tags attached to equipment may instead be listed on the equipment nameplate.

A seismic report is not required for the low seismic performance level.

1.19 TOOLS AND APPLIANCES:

The Contractor shall furnish, and include in the price offered, all special tools and appliances that are required for satisfactory installation, operation, and maintenance of transformer(s) furnished, including any special wrenches or appliances that are necessary for assembling and disassembling the transformer(s). A lif ting beam and slings are not required to be furnished by the Contractor.

When shipping the transformer(s), the Contractor shall submit a complete list of the tools and appliances that are being furnished.

1.20 PAINTING:

Af ter fabrication, the Contractor shall clean and paint the equipment with the manufacturer’s standard cleaning and painting system. Coated surfaces shall be protected from abrasion or other damage at all times. Surfaces not to be painted shall be protected by appropriate masking during the cleaning and painting of adjacent metalwork. The color shall be ANSI No. 70 light gray.

1.21 SPARE PARTS:

The Contractor shall furnish the following spare parts for each transformer bid item unless otherwise indicated:

1. One bushing of each voltage class, including neutral bushing, as specified for the transformer.

The spare bushings shall have the indicated BIL’s at the elevation specified in solicitation (rating and features).

2. One surge arrester of each voltage class as specified for the transformer.

3. One complete set of gaskets for the transformer.

4. One complete extra relay and contactor of each type and size used for the transformer.

5. One quart (32 f luid ounces) of touch-up paint which matches the color of the equipment, to be used to correct small areas of paint damage. The contractor shall also provide paint chip samples similar to color patches or paint swatches, so that the transformer maintenance crews can match paint without the need to store touch-up paint.

Spare Parts Listings shall be furnished, in accordance with specification requirements.

1.22 ELECTRICAL DRAWINGS AND DATA:

1. GENERAL: Drawings and technical data required to be furnished by the Contractor shall be in English, with dimensions in feet and inches, weight in pounds, and volume in cubic feet or cubic inches.

The drawings and data shall be complete and accurate in their content. Originals and copies shall be legible. Drawings shall be prepared using drafting equipment, shall be drawn to scale, and shall have neat lettering. Freehand sketches will not be accepted. Western will require 30 calendar days to answer correspondence pertaining to each submittal of data or drawings.

Schematic and wiring diagrams shall have graphical symbols and device function numbers conforming to the latest applicable standards of IEEE 315, IEEE 315A, and IEEE C37.2.

Reproducible prints shall be of such quality as to permit clear, sharp, legible prints or other reproductions to be made by direct contact methods. Electronic versions of the drawings shall also be provided on a CD and via email with the drawings available in both AutoCAD (dwg) and Acrobat (pdf) formats. All emails sent in reference to this contract shall include the Western contracting officer as an addressee and the contracting officer shall receive electronic copies of all submittals.

Western shall have the right to require the Contractor to make any changes in the drawings and data that may be necessary to show the equipment furnished conforms to the requirements of the specifications and Western’s equipment standards. The design of electrical equipment shall be the responsibility of the Contractor and Western assumes no responsibility to approve or review drawings and data that are submitted. Western’s review of the Contractor’s drawings shall not relieve the Contractor of meeting specification requirements or for correctness of drawings. Revised drawings shall show revision dates and all changes and revisions circled on the drawings. Drawings shall not exceed 22 inches in height by 36 inches in width. All drawings shall clearly show the substation name and the Western contract number.

Table – A shows the required delivery time, quantity requirements, and locations.

Table A

DRAWINGS AND DATA SCHEDULE FOR POWER TRANSFORMERS

Type of Drawings and Data Paragraph Delivery Time Type of

Material Quantity For Each Item (1.22.7)

Preliminary Informational

Drawings and Data for Foundation Design

1.22.2.a through g, i, j, k, l, and p

Within 90 calendar days after date of contract award

AutoCAD and PDF versions via email

1 location A 1 location B

Informational drawings and data including seismic qualif ication report

1.22.2.a through 2.t

‡ Within 120 calendar days af ter date of contract award

AutoCAD and PDF versions via email

1 location B

Final drawings 1.22.3.a through 3.j

21 days prior to shipment

AutoCAD and PDF versions via email

Parts identification lists or bills of materials 1.22.3.h 21 days prior to shipment

Lists, hard copy and PDF via email

1 location A 4 location B 1 w/transformer

†Manufacturer’s operation and maintenance instructions

1.22.3.i 21 days prior to shipment

Books with f inal drawings and PDF version via email

1 location A

Type of Drawings and Data Paragraph Delivery Time Type of

Material Quantity For Each Item (1.22.7)

Tools and Appliances, and Spare Parts list 1.22.3.j

90 days af ter award and

21 days prior to shipment (as part of

O&M manual)

Lists, hard copy and PDF via email

1 location A

Extra spare parts list 1.22.3.j

90 days af ter award and

21 days prior to shipment (as part of

O&M manual)

Lists, hard copy and PDF via email

1 location A

Test reports 1.22.4. ASAP or 7 days prior to shipment

Certif ied Data, PDF via email

1 location A

Oil No-PCB certif ication 1.22.5. Prior to shipment or delivery of oil Certif ied Data, PDF via email

1 location A

Impact Tests SFRA Part 3.5.

30 days af ter receipt of impact recorder 30 days af ter completion of second SFRA test at site location

Certif ied Data, hard copy and PDF via email

† Furnish one print of each final drawing with each copy of instructions.

‡ Seismic qualification report may be submitted within 150 calendar days after date of contract award, if equipment was not previously qualified per the latest IEEE 693. A seismic report is not required for the low seismic performance level.

2. PRELIMINARY AND INFORMATIONAL DRAWINGS AND DATA: The Contractor shall submit the following drawings and data for the purpose of enabling Western to proceed with the design of the installation. The dimensions and data shall be f irm and not subject to change (typical drawings are not acceptable). The drawings and data shall be suitable for foundation design, and any costs f rom changes impacting design and construction will be passed on to the Contractor. The submittal shall be identified by substation name and contract number. All drawings shall be available as hardcopy prints and on CD both in AutoCAD and pdf formats. The type of drawings and data to be furnished shall be as follows:

Drawings and data required for foundation and equipment platform design are shown as follows:

a. Transformer outlines, dimensions, and weights.

b. Base type, dimensions, and mounting details.

c. Location, types, sizes, and projections of required embedded anchor bolts or anchor plates.

d. Location and size of required openings in the foundation for conduits.

e. Orientation of equipment and a complete anchor bolt or anchor plate setting plan.

f. Size and location of lifting lugs and jacking pads for transformer.

g. Overall equipment cabinet dimensions, including height above equipment base.

h. Seismic qualification report. A seismic report is not required for the low seismic performance level.

i. Equipment outline and layout drawings: The outline drawings shall be accompanied by bills of materials and descriptions giving complete information on each component. The outline drawings shall show the center of gravity for installation of the transformer filled with oil and completely assembled. Also, the center of gravity for shipment of the transformer shall be shown on the outline drawings.

j. Description of oil preservation system.

k. Equipment weights, including total weight with oil, weight of oil, weight of core and coils, weight of case and fittings, and the weight of the heaviest part to be shipped in one piece.

l. Overall dimensions.

m. Control and Power Drawings.

n. Auxiliary power requirements in kVA at 240/120 V for CLIN 0001 single phase, 60 Hz.

o. Schematic drawing of transformer winding connections.

p. Nameplate drawing.

q. Design impedance, HV-LV, and the impedances at all the tap positions.

r. Informational drawings and data for the control and protective devices.

s. Control cabinet physical layout drawing (showing the layout of all components in the cabinet).

t. Catalog literature, drawings, schematic and wiring diagrams for required items and any optional items ordered.

This material shall include schematic and wiring diagrams, instruction leaflets, catalog data, and outline drawings required by Western to prepare final control system designs and installation drawings. The data shall specifically verify compliance with the equipment requirements and be suf ficiently complete to allow preparation of final installation wiring diagrams by others.

3. FINAL DRAWINGS AND DATA: At least 21 days before the date the Contractor begins to ship any of the subject equipment, he shall furnish to the destinations listed in Table-A, final drawings that are rolled or f lat, not folded. Drawings shall be printed on quality bond paper; be full-size;

and be clear, sharp, and legible. The Drawings shall also be furnished as electronic versions on a CD both in AutoCAD (dwg) and Acrobat (pdf) formats. The drawings shall show all changes, and revision dates made up to the time the drawings and data are furnished. Final drawings shall be furnished for the following:

a. Outlines of transformers.

b. Outlines of surge arresters. (Final drawings of these may be omitted provided prints are in the instruction books.)

c. Outlines of the bushings. (Final drawings of these may be omitted provided prints are in the instruction books.)

d. Nameplate drawings.

e. Wiring and schematic diagrams.

f. Control cabinet physical layout drawing (showing the layout of all components in the cabinet).

g. Drawings, schematic and wiring diagrams for optional Items if the Government elects to procure optional items.

h. Sets of parts identification lists or bills of materials for the equipment above. Each part shall be assigned an identifying number which can be used for ordering replacements and a reference number that locates the part on the appropriate outline drawing. Four copies of the identif ication or bills of materials shall accompany each shipment of material to the substation. The identification list or bills of materials shall identify which material is included in each shipment of material to the substation.

i. Sets of manufacturer’s instruction books or pamphlets covering installation, operation, and maintenance repair for the electrical equipment above and for each device appurtenant to the equipment. The instruction books shall include the oil-filling procedures. A print of each f inal drawing as required above shall be included in each instruction book. Also include data, instruction manual, and drawings covering the operation, maintenance, and repair of optional items if the Government elects to procure any optional items.

j. Spare parts listing for the spare parts specified in paragraph 1.21 shall be furnished. The listing shall include part description, part order number, catalog number, part price, and reference to equipment drawings. This list must be included in the O&M manual.

Extra spare parts listing shall be furnished by the Contractor which lists extra spare parts that the manufacturer recommends for each item transformer, in addition to the spare parts required under paragraph 1.21. The listing shall include part description, part order number, catalog number, part price, and reference to equipment drawing. These parts shall be available for Western’s option to purchase and the prices shall be valid for a time period of 1 year af ter delivery of the transformers. This list must be included in the O&M manual.

4. EQUIPMENT TEST REPORTS: Prior to shipment of the equipment and af ter completion of those tests required on the electrical equipment, the Contractor shall furnish certified copies of all test reports, performance curves, data, etc. The copies shall be electronic and hard copy.

Any equipment which does not successfully pass the testing requirements will be rejected. The reports shall be sent to the destinations listed in Table A. The transformer will not be shipped until all factory test results are satisfactory to the factory inspector.

5. INSULATING LIQUID CERTIFICATION: Certif ication shall be furnished showing that insulating liquids used in equipment do not contain polychlorinated biphenyls (Non-PCB oil).

6. RIGHT TO USE CONTRACTOR’S DRAWINGS: Western expressly reserves the right to use, reproduce in whole or in part, to distribute, and to reuse any and all such drawings, whether copyrighted or not, in connection with the following:

a. Installation, maintenance, replacement, and repair of the articles to be furnished under these specifications; and

b. Making any and all such drawings and reproductions thereof available to subsequent bidders and Contractors, where necessary for fabricating and furnishing articles connected with or dependent upon information shown on the drawings and duplicating the drawings to be furnished hereunder.

c. The depositing of all such drawings with Western shall constitute a license to Western to use said drawings in the manner hereinabove stated.

7. DRAWING AND DATA ADDRESS AND CONTACTS:

The Table - A data shall be sent to the following addresses listed below. For each submittal of drawings and data, the Contracting Officer shall be furnished an electronic copy, for tracking purposes and contract compliance.

Address location A (electronic submittals…