Attachment 2 Sheet G-103 Am-0006.pdf
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- Solicitation number
- W9128F25RA053
About this file
This document is a Requirements Summary Sheet for Fort Peck Dam 230 kV Generator Step-Up (GSU) Transformers, prepared by the U.S. Army Corps of Engineers Hydroelectric Design Center for the Omaha District. The specification details a high-voltage power transformer with a 42,000/56,000 kVA rating, three-phase configuration, and specific technical requirements including a 230,000V (H) to 13,800 Delta (X) voltage rating, ONAN/ONAF cooling class, and 65°C temperature rise. Key technical specifications include porcelain bushings with specific BIL levels, surge arresters rated at 140 kV MCOV, and a constant oil pressure system (COPS) tank with a maximum oil volume of 7,000 gallons and total weight of 230,000 lbs.
The document outlines extensive factory acceptance test requirements, including sweep frequency response analysis, lightning impulse tests, temperature rise tests, and audible sound level tests. Detailed provisions cover transformer construction, accessories, nameplates, control and power cabinets, and spare parts. Unique features include a portable fall arrest system anchor post, on-line dissolved gas and moisture content monitoring, and specific wiring and cabinet specifications. The transformer is designed for use at Fort Peck Dam in Missouri River Switchyard #2, with the solicitation number W9128F25R0002 and an anticipated completion date in January 2025.
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NAMEPLATE DATA:
TANK AND CONSTRUCTION:
ACCESSORIES:
BUSHINGS:
SURGE ARRESTERS:
INSULATING OIL:
SEPARATE CONTROL AND POWER CABINETS:
SPARE PARTS:
FACTORY ASSEMBLY AND PAINT:
FACTORY ACCEPTANCE TESTS (F.A.T.):
REQUIREMENTS SUMMARY SHEET
FORT PECK DAM 230 KV GSU TRANSFORMERS
(REFERENCE SPECIFICATION SECTION 48 19 23.04 26)
NAPTHENIC BASE - ASTM D 3487 TYPE II; 0.3% BY MASS OF OXIDATION INHIBITOR∙ TYPE:
(4) COMPLETELY ASSEMBLED AND WITNESSING OF FACTORY ACCEPTANCE TESTS
(3) COMPLETED CORE/COIL ASSEMBLY, BUT PRIOR TO TANKING
(2) AFTER COMPLETION OF WINDINGS BUT PRIOR TO LANDING ON CORE
(1) DESIGN REVIEW MEETING
GOVERNMENT INSPECTIONS PERFORMED DURING∙ INSPECTIONS:
FOR ONE WEEK PRIOR TO OIL FILLING.
PRIMER COAT, OIL-RESISTANT FINISH COAT - WHITE. ALLOW TO CURE∙ INTERIOR PAINT:
CABINETS, SHALL REMAIN UNPAINTED. COVER TO RECEIVE A NON-SLIP COATING.
5BG 7/0.4 HIGH-GLOSS. CORROSION RESISTANT SURFACES, AND STAINLESS STEEL
PRIMER COAT, EPOXY BASE COAT, POLYURETHANE TOP COAT - MUNSELL∙ EXTERIOR PAINT:
MATCH-MARKED FOR EASE OF REASSEMBLY.
TRANSFORMER TO BE FULLY ASSEMBLED, WITH REMOVABLE COMPONENTS∙ ASSEMBLY:
7,000 GAL∙ MAXIMUM TOTAL OIL VOLUME:
230,000 LB∙ MAXIMUM TOTAL WEIGHT:
70 DB∙ MAXIMUM SOUND LEVEL (ONAF):
CONSTANT OIL PRESSURE SYSTEM (COPS) TANK∙ OIL PRESERVATION SYSTEM:
65 ºC∙ TEMPERATURE RISE:
5 TAPS; 2 @ +2.5%, 2 @ -2.5% OF NOMINAL 230 KV TAP∙ SECONDARY WINDING (H) DETC:
11.0% @ 42,000 KVA (H-X)∙ IMPEDANCE:
60 HZ∙ FREQUENCY:
THREE-PHASE∙ PHASING:
900 (H) / 110 (X) / 150 (H0)∙ BIL LEVELS, KV:
230,000 GRDY (H) - 13,800 DELTA (X)∙ VOLTAGE RATINGS:
42,000 / 56,000∙ KVA RATING:
ONAN/ONAF∙ COOLING CLASS:
CLASS II GSU POWER TRANSFORMER∙ TYPE:
TO A GROUND PAD AT TRANSFORMER BASE.
#4/0 AWG INSULATED GROUNDING CONDUCTOR FROM EACH ARRESTER TO∙ GROUNDING:
REMOVABLE BRACKETS ON TOP OF TRANSFORMER.∙ MOUNTING:
MINIMUM ENERGY CLASSIFICATION - D
140 KV MCOV; 172 KV DUTY CYCLE; 10 KA IMPULSE CLASSIFYING CURRENT;∙ RATINGS:
PORCELAIN WITH METAL GRADING RING ASSEMBLY ∙ CONSTRUCTION:
ANALOG TEMPERATURE GAUGE FUNCTIONAL VERIFICATION∙
BUSHING CURRENT TRANSFORMER ROUTINE TESTS∙
AND POWER FACTOR TESTS DURING TRANSFORMER F.A.T.
EACH HIGH-VOLTAGE AND HIGH-VOLTAGE NEUTRAL BUSHING ARE TO UNDERGO CAPACITANCE∙
ALL ELECTRICAL AND ELECTO-MECHANICAL DEVICES ARE TO BE FUNCTIONALLY TESTED∙
DE-ENERGIZED TAP CHANGER MECHANICAL OPERATIONAL TEST (5 COMPLETE CYCLES)∙
SHIPPING CONFIGURATION
- ONE SFRA TEST TO BE PERFORMED WITH THE TRANSFORMER IN THE
OIL FILLED
- ONE SFRA TEST TO BE PERFORMED WITH THE TRANSFORMER FULLY ASSEMBLED AND
- CABLE INTEGRITY TEST REQUIRED
SWEEP FREQUENCY RESPONSE ANALYSIS (WITH ELECTRONIC DATA FILES)∙
LEAKAGE REACTANCE (WITH ELECTRONIC DATA FILES)∙
ONE HOUR LEVEL: 300 PC
INDUCED VOLTAGE TEST ACCEPTANCE CRITERIA: 7,200 CYCLE ENHANCEMENT LEVEL: 500 PC;∙
MANUFACTURED
AUDIBLE SOUND LEVEL TESTS ARE TO BE PERFORMED ON ONE TRANSFORMER∙
LIGHTNING IMPULSE TESTS∙
TRANSFORMER
TEMPERATURE RISE TESTS ARE TO BE PERFORMED AT EACH COOLING STAGE ON ONE∙
ALL 'ROUTINE' TESTS (IEEE C57.12.00, TABLE 17)∙
HORIZONTAL-DRAFT (EXAMPLE: KRENZ-VENT F26)∙ COOLING FANS:
HOT-DIP GALVANIZED.∙ RADIATORS:
STEEL. MAXIMUM DESIGN FLUX DENSITY OF 1.75 TESLA. STEP-LAP CONSTRUCTION.
LAMINATIONS MAXIMUM THICKNESS OF 0.270MM, COLD-ROLLED, GRAIN-ORIENTED∙ CORE:
SEISMIC CALCULATIONS REQUIRED FOR MAIN TANK AND ALL MAJOR COMPONENTS.∙ SEISMIC:
DESIGN LOADS FOR EACH EYE SHALL BE TWO TIMES THE ACTUAL LOAD.∙ LIFTING EYES:
DESIGNED FOR PAD MOUNTING WITH SEISMIC WELDING TO STEEL PLATES.∙ BASE:
8517412)
DESIGNED FOR USE WITH THE FALL ARREST ANCHOR POST. (EXAMPLE MODEL DBI-SALA
UNI-ANCHOR PLATE AND LUG,∙ PORTABLE FALL ARREST ANCHOR POST MOUNTING PLATE:
GROUND PAD AT BASE OF TANK.
#4/0 INSULATED COPPER CONDUCTOR FROM NEUTRAL BUSHING TO TANK∙ GROUNDING:
STAINLESS STEEL BALL-TYPE (RADIATORS MAY USE BUTTERFLY-TYPE)∙ VALVES:
TO BE USED FOR GASKET GROOVES OF RECTANGULAR CROSS-SECTION.
THAT THE LOW-VOLTAGE BUSHING GASKETS WILL BE VITON. O-RING GASKETS ARE NOT
NITRILE NBR (BUNA-N), DURO 50-70, 25% COMPRESSION, WITH THE EXCEPTION∙ GASKETS:
DE-ENERGIZED TAP CHANGER SWITCH MECHANISM.
REMOVABLE COVER IN THE TANK SIDEWALL FOR ACCESS TO THE∙ DETC ACCESS COVER:
24-INCH DIAMETER (QTY: 3)∙ MANHOLE:
(QTY 1): VALVE OF EACH SIZE AND TYPE∙
(QTY 1): FUSE OF EACH TYPE AND RATING∙
PLATE TO THE FIBER-OPTIC WINDING TEMPERATURE MONITOR
(QTY 10): FIBER OPTIC EXTENSION CABLE THAT CONNECTS THE FEED-THROUGH WALL∙
(QTY 3): COOLING FAN COMPLETE WITH MOTOR∙
(QTY 1): BUCHHOLZ RELAY∙
(QTY 1): OIL TEMPERATURE INDICATOR∙
(QTY 1): WINDING TEMPERATURE INDICATOR∙
(QTY 1): LIQUID LEVEL INDICATOR∙
ON THE TRANSFORMERS
(QTY 1): TRANSFORMER MONITOR CONFIGURED THE SAME AS THAT PROVIDED∙
(QTY 1): RAPID PRESSURE RISE SEAL-IN RELAY∙
(QTY 1): RAPID PRESSURE RISE RELAY∙
(QTY 1): PRESSURE RELIEF DEVICE∙
(QTY 1): RELAY AND CONTACTOR OF EACH TYPE AND RATING∙
(QTY 1): ANNUNCIATOR∙
(QTY 1): BUSHING CURRENT TRANSFORMER OF EACH TYPE AND RATING∙
(QTY 2): SET OF GASKETS FOR TRANSFORMER ON-SITE REASSEMBLY AFTER DELIVERY∙
(QTY 1): COMPLETE GASKET SET∙
(QTY 1): 25 KV LOW-VOLTAGE WINDING BUSHING∙
(QTY 1): 25 KV HIGH-VOLTAGE NEUTRAL BUSHING∙
(QTY 1): 230 KV HIGH-VOLTAGE WINDING BUSHING∙
ANODIZED ALUMINUM OR STAINLESS STEEL WITH ENGRAVED BLACK LETTERING.
- DEVICE NAMEPLATES WITHIN THE CONTROL AND POWER CABINETS MADE OF
BUSHINGS MADE OF STAINLESS STEEL WITH BLACK LETTERING.
- EQUIPMENT NAMEPLATES FOR THE HIGH-VOLTAGE BUSHINGS AND LOW-VOLTAGE
LIFT POSITIONS
- AN ADDITIONAL LIFTING DIAGRAM NAMEPLATE INDICATING SLING LOCATIONS AND
CALCULATED X/R RATIO∙
PRESSURE AND VACUUM THE TANK WILL WITHSTAND∙
GOVERNMENT CONTRACT NUMBER∙
PLANT LOCATION∙
MANUFACTURING DATE∙
TABLE 7, INCLUDING THE FOLLOWING:
- CAST BRONZE OR STAINLESS STEEL WITH INFORMATION LISTED IN IEEE C57.12.00,
∙ NAMEPLATES:
- FOLD-DOWN MAINTENANCE TRAY ON INSIDE OF CONTROL CABINET DOOR.
GRADE HUMIDISTAT / THERMOSTAT CONTROL.
- PTC RESISTOR DESIGN ENCLOSURE HEATERS WITH INTEGRAL FANS, AND INDUSTRIAL
CABINET.
- 120 V AC, 20 A HOSPITAL GRADE GFCI RECEPTACLE MOUNTED INSIDE THE CONTROL
- 120 V AC, 1,000 LUMEN LED TYPE A19 LAMPS WITH DOOR-ACTUATED SWITCH.
IN POWER CABINET.
- ALL CIRCUITS, WIRING AND EQUIPMENT RATED GREATER THAN 120 V AC TO BE MOUNTED
PROVIDED IN CABINET DOOR FOR VIEWING.
MOUNTED ON SWING PANEL WITHIN CONTROL CABINET, WITH WEATHERPROOF WINDOW
- FIBER-OPTIC WINDING TEMPERATURE MONITOR (EXAMPLE: NEOPTIX T/GUARD, MODEL 408)
DOOR FOR VIEWING.
PANEL WITHIN CONTROL CABINET, WITH WEATHERPROOF WINDOW PROVIDED IN CABINET
- TRANSFORMER MONITOR WITH COOLING CONTROL (SEL MODEL 2414) MOUNTED ON SWING
CABINET, WITH WEATHERPROOF WINDOW PROVIDED IN CABINET DOOR FOR VIEWING.
- ONE 10 PT. ANNUNCIATOR (SEL MODEL 2533) MOUNTED ON SWING PANEL WITHIN CONTROL
SERIES 24)
- LOCKOUT RELAY WITH TRIP COIL MONITORING AND INDICATORS (EXAMPLE: ELECTROSWITCH
∙ SPECIAL FEATURES:
- 125 AND 250 V DC CIRCUITS - RATED 125/250 OR 250 V DC, AND 10,000 A INTERRUPTING
- 120 V AC CIRCUITS - RATED 250 V DC AND 120/240 OR 240 V AC, AND 10,000 A INTERRUPTING
- 480 V AC CIRCUITS - RATED 600 V AC AND 35,000 A INTERRUPTING AT 480 VAC
∙ MOLDED-CASE CIRCUIT BREAKERS:
120 V AC CIRCUITS - 10 A
- SINGLE-BREAK INDUCTIVE LOAD INTERRUPTING RATING: 125 V DC CIRCUITS - 1.5 A;
- RATED FOR 600 V AC OR 250 V DC
∙ SWITCHES:
120 V AC CIRCUITS - 6.0 A
- SINGLE-CONTACT INDUCTIVE LOAD INTERRUPTING CAPACITY: 125 V DC CIRCUITS - 1.0 A;
- RATED FOR 125 V DC OR 120 V AC; MEETS REQUIREMENTS OF NEMA ICS5; 10 A CONTACTS
∙ AUXILIARY RELAYS:
600 V, 30 A MINIMUM, 90 ºC RATED TERMINATIONS.∙ TERMINAL BLOCKS:
RESISTANT MALLEABLE IRON WITH CAST COVERS AND LIQUID-TIGHT HUBS.
JOINT COMPOUND APPLIED. OUTLET AND JUNCTION BOXES ARE TO BE CORROSION
CHANNELS NOT ALLOWED. ALL CONDUIT THREADED JOINTS ARE TO HAVE A CONDUCTIVE
ALL WIRING TO BE RUN IN CONDUIT. WIRE RUNS THROUGH TANK REINFORCING∙ CONDUIT:
GROUND - GREEN/YELLOW
PHASE B - ORANGE; PHASE C - YELLOW; GROUNDED NEUTRAL - WHITE; INSULATED
XLPE; 3-PHASE POWER CONDUCTORS COLOR CODED: PHASE A - BROWN;∙ WIRING:
POWER - 125 V DC; COOLING FANS - 480 V AC, 3-WIRE, 3-PHASE, 60 HZ
CONTROL POWER - 125 V DC; ANNUNCIATION∙ GOVERNMENT-FURNISHED POWER:
IN CONTROL CABINET. SOLAR SHIELDING ON TOP, FRONT AND SIDE PANELS OF ENCLOSURES.
PROVISIONS. WINDOWS FOR VIEWING THE TEMPERATURE MONITOR AND ANNUNCIATOR
WEATHER-PROOF TYPE 304 STAINLESS STEEL WITH LOCKING∙ CABINET MATERIAL:
(EXAMPLE: DBI-SALA, MODEL 8516691)
PORTABLE FALL ARREST SYSTEM ANCHOR POST WITH DAVIT ARM∙
MAINTENANCE-FREE DEHYDRATING BREATHER (MESSKO, MODEL DB200G GAMMA)∙
RAPID PRESSURE RISE RELAY (EXAMPLE: QUALITROL, MODEL 900-FLA)∙
SCHAFFER CALISTO R9)
ON-LINE DISSOLVED GAS AND MOISTURE CONTENT MONITOR (EXAMPLE: MORGAN∙
(EXAMPLE: QUALITROL, MODEL XPRD)
DIRECTED-FLOW PRESSURE RELIEF DEVICE WITH METAL DISCHARGE PIPING∙
BUCHHOLZ RELAY (EXAMPLE: EMB, TYPE 09)∙
OIL LEVEL INDICATOR ON CONSERVATOR TANK (EXAMPLE: QUALITROL, MODEL 042)∙
WTI AND OTI GAUGES WITH RTDS (EXAMPLE: AKM)∙
2.5 KV CLASS, 45 KV BIL, 100 AMP∙ SFRA TEST SHIPPING BUSHING:
2.5 KV CLASS, 45 KV BIL, 100 AMP∙ CORE GROUNDS:
METERING ACCURACY, C400 MINIMUM RELAYING ACCURACY)
IMPREGNATED SYNTHETIC (RIS) CONDENSER CORE DESIGN (TWO 800:5 CT, 0.3B-1.8
25 KV CLASS, 200 KV BIL, 400 AMP, COMPOSITE EXTERIOR WITH RESIN-∙ NEUTRAL (H0):
INDICATING EQUIPMENT OR TRANSFORMER TEMPERATURE MONITOR SYSTEM)
(BUSHING CURRENT TRANSFORMERS AS REQUIRED FOR THE WINDING TEMPERATURE
BULK-TYPE, LOW-CORONA, LIGHT CONTAMINATION, 125 ºC TEMPERATURE RISE RATING
25 KV CLASS, 150 KV BIL, 3,000 AMP, PORCELAIN CONSTRUCTION,∙ PRIMARY WINDING (X):
0.6B-1.8 OR 0.3B-1.8 METERING ACCURACY, C400 RELAYING ACCURACY)
RESIN-IMPREGNATED SYNTHETIC (RIS) CONDENSER CORE DESIGN (THREE 600:5 MRCT,
230 KV CLASS, 900 KV BIL, 400 AMP, COMPOSITE EXTERIOR WITH∙ SECONDARY WINDING (H):
UNUSUAL SERVICE CONDITIONS:
CELSIUS (SEE SHEET G-102)
33.3 DEGREES∙ MAXIMUM AVERAGE AMBIENT AIR TEMPERATURE (24-HOUR PERIOD):
43.3 DEGREES CELSIUS (SEE SHEET G-102)∙ MAXIMUM AMBIENT AIR TEMPERATURE:
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