Drawing G-003.pdf

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OLD HICKORY DAM 69 KV GSU TRANSFORMERS

REQUIREMENTS SUMMARY SHEET

NAMEPLATE DATA:

• TYPE: CLASS II GSU POWER TRANSFORMER

• COOLING CLASS: ONAN/ONAF

• KVA RATING: 75,000 / 100,000

• VOLTAGE RATINGS: 161,000 Yx69,000 Y (H) - 13,200 DELTA (X)

• BIL LEVELS, KV: 650 ( H) / 110 ( X) / 150 ( HO)

• PHASING: THREE-PHASE

• IMPEDANCE: 7.5 % ( H-X, 69kV) 7.5 - 12% ( H-X, 161 kV)

• SECONDARY WINDING ( H) DETC ( S) :

DETC 1:

DETC 2:

NOMINAL TAP SELECTOR 161 OR 69 KV

5 TAPS; 2@ +2.5%, 2@ -2.5% OF 69 KV NOMINAL

• TEMPERATURE RISE: 65 °C

• OIL PRESERVATION SYSTEM: NITROGEN GAS BLANKETED

• MAXIMUM SOUND LEVEL ( ONAF) AT 161 KV: 68 DB

• MAXIMUM NO-LOAD LOSSES AT 161 KV: 180 KW

• MAXIMUM LOAD LOSSES AT 161 KV: 90 KW

• FREQUENCY: 60 HZ

TANK AND CONSTRUCTION:

• MAN-HOLE: 24-INCH DIAMETER ( MINUMUM ONE)

• GASKETS: NITRILE NBR ( BUNA-N) , DURO 50-70, 25% COMPRESSION, WITH THE

EXCEPTION THAT THE LOW-VOLTAGE BUSHINGS GASKETS WILL BE VITON.

O-RING GASKETS SHALL NOT BE USED FOR GASKET GROOVES OF RECTANGULAR

CROSS-SECTION.

• VALVES: STAINLESS STEEL BALL-TYPE

• PORTABLE FALL ARREST ANCHOR POST MOUNTING PLATE: QTY 2 UNI-ANCHOR PLATE AND

LUG, DBI-SALA MODEL 8517412, DESIGNED FOR USE WITH THE DBI-SALA FALL ARREST

ANCHOR POST.

• ACCESS LADDER: FIXED STEEL LADDER WITH WALK-THRU HANDRAIL ACCESS, SAFETY

CAGE AND LOCKABLE LADDER GUARD, POWDERCOATED YELLOW.

• BASE: DESIGNED FOR PAD MOUNTING WITH SEISMIC WELDING TO STEEL PLATES.

• LIFTING EYES: DESIGN LOADS FOR EACH EYE SHALL BE TWO TIMES THE ACTUAL LOAD.

• SEISMIC: SEISMIC CALCULATIONS REQUIRED FOR MAIN TANK AND ALL MAJOR

COMPONENTS.

• CORE: LAMINATIONS MAXIMUM THICKNESS OF 0.270MM, COLD-ROLLED, GRAIN

ORIENTED STEEL. MAXIMUM DESIGN FLUX DENSITY OF 1.75 TESLA. STEP-LAP

CONSTRUCTION.

• RADIATORS: HOT-DIP GALVANIZED.

• COOLING FANS: VERTICAL-DRAFT.

ACCESSORIES:

• WTI AND OTI GAUGES

• OIL LEVEL INDICATOR

• DUAL-TANK NITROGEN REGULATOR CABINET WITH ELECTRICAL PACKAGE

• DIRECTED-FLOW PRESSURE RELIEF DEVICE WITH DISCHARGE PIPING ( QUALITROL XPRD)

• ON-LINE DISSOLVED GAS AND MOISTURE CONTENT MONITOR ( SERVERON TM8)

• TRANSFORMER TEMPERATURE MONITOR WITH COOLING CONTROLS AND FIBER-OPTIC

WINDING TEMPERATURE MEASUREMENT ( QUALITROL QTMS)

• ELECTRONIC PRESSURE MONITOR, WITH THREE SENSORS ON MAIN TANK ( QUALITROL 930)

• PORTABLE FALL ARREST SYSTEM ANCHOR POST WITH DAVIT ARM ( DBI-SALA, MODEL 8516691)

• SURGE ARRESTER DISCHARGE COUNTERS ( BOWTHORPE SC13)

SURGE ARRESTERS:

• RATINGS: 48 KV MCOV; 60 KV DUTY-CYCLE

• MOUNTING: REMOVABLE BRACKETS ON TOP OF TRANSFORMER

• GROUNDING: #4/0 AWG INSULATED GROUNDING CONDUCTORS FROM ARRESTERS

TO DISCHARGE COUNTERS, AND FROM THE DISCHARGE COUNTERS TO A

GROUND PAD.

( REFERENCE SPECIFICATION SECTION 48 19 23.04 26)

BUSHINGS:

• SECONDARY WINDING ( H) : 230KV CLASS, 900 KV BIL, 1,200 AMP, COMPOSITE EXTERIOR WITH

RESIN-IMPREGNATED SYNTHETIC ( RIS) CONDENSER CORE DESIGN

( PROVISIONS FOR FUTURE INSTALLATION OF TWO MRCl)

• PRIMARY WINDING ( X) : 25 KV CLASS, 150 KV BIL, 5,000 AMP, PORCELAIN CONSTRUCTION, LOW CORONA BULK-TYPE, LIGHT CONTAMINATION, 125 °C TEMPERATURE RISE RATING ( BUSHING CURRENT TRANSFORMERS AS REQUIRED

FOR THE TRANSFORMER TEMPERATURE MONITOR SYSTEM)

• NEUTRAL ( HO) : 25 KV CLASS, 150KV BIL, 200 AMP, COMPOSITE EXTERIOR WITH RIS) CONDENSER CORE DESIGN

(TWO 200:5 CT, C400 RELAYING ACCURACY)

• CORE GROUNDS: 2.5 KV CLASS, 45 KV BIL, 100 AMP

• SFRA TEST SHIPPING BUSHING: 2.5 KV CLASS, 45 KV BIL, 100 AMP

INSULATING OIL:

• NAPTHENIC BASE - ASTM D 3487 TYPE II; 0.3% BY MASS OF OXIDATION INHIBITOR

SEPARATE CONTROL AND POWER CABINETS:

• CABINET MATERIAL: WEATHER-PROOF TYPE 304 STAINLESS STEEL WITH LOCKING PROVISIONS. WINDOWS FOR

VIEWING QUALITROL QTMS AND ANNUNCIATOR IN CONTROL CABINET. SOLAR SHIELDING ON TOP, FRONT AND

SIDE PANELS OF ENCLOSURES.

• GOVERNMENT-FURNISHED POWER: CONTROL POWER - 125 V DC; ANNUNCIATION POWER - 125 V DC;

COOLING FANS - 480 V AC, 3-WIRE, 3-PHASE, 60 HZ

• WIRING: XLPE; 3-PHASE POWER CONDUCTORS COLOR CODED: PHASE A - BROWN; PHASE B - ORANGE;

PHASE C - YELLOW; GROUNDED NEUTRAL - WHITE; INSULATED GROUND - GREEN/YELLOW

• CONDUIT: ALL WIRING TO BE RUN IN CONDUIT. WIRE RUNS THROUGH TANK REINFORCING CHANNELS NOT ALLOWED.

ALL CONDUIT THREADED JOINTS SHALL HAVE A CONDUCTIVE JOINT COMPOUND APPLIED. OUTLET AND JUNCTION

BOXES SHALL BE CAST ALUMINUM WITH CAST COVERS AND LIQUID-TIGHT HUBS.

• TERMINAL BLOCKS: 600 V, 30 A MINIMUM, 90 °C RATED TERMINATIONS.

• AUXILIARY RELAYS:

- RATED FOR 125 V DC OR 120 V AC; MEETS REQUIREMENTS OF NEMA ICS5; 10 A CONTACTS

- SINGLE-CONTACT INDUCTIVE LOAD INTERRUPTING CAPACITY: 125 V DC CIRCUITS - 1.0 A;

120 V AC CIRCUITS - 6.0 A

• SWITCHES:

- RATED FOR 600 V AC OR 250 V DC

- SINGLE-BREAK INDUCTIVE LOAD INTERRUPTING RATING: 125 V DC CIRCUITS - 1.5 A;

120 V AC CIRCUITS - 10 A

• MOLDED-CASE CIRCUIT BREAKERS:

- 480 V AC CIRCUITS - RATED 600 V AC AND 35,000 A INTERRUPTING AT 480 V AC

- 120 V AC CIRCUITS - RATED 250 V DC AND 120/240 OR 240 V AC, AND 10,000 A INTERRUPTING

- 125 AND 250 V DC CIRCUITS - RATED 125/250 OR 250 V DC, AND 10,000 A INTERRUPTING

• SPECIAL FEATURES:

- TWO 10 PT. ANNUNCIATORS ( SEL MODEL 2533) MOUNTED ON SWING PANEL WITHIN CONTROL CABINET, WITH

WEATHERPROOF WINDOW PROVIDED IN CABINET DOOR FOR VIEWING.

- TRANSFORMER TEMPERATURE MONITOR ( QUALITROL QTMS) , WITH HMI MODULE MOUNTED ON SWING

PANEL WITHIN CONTROL CABINET, WITH WEATHERPROOF WINDOW PROVIDED IN CABINET DOOR FOR

VIEWING.

- ALL CIRCUITS, WIRING AND EQUIPMENT RATED GREATER THAN 120 V AC TO BE MOUNTED IN POWER CABINET.

- 120 V AC, 1,000 LUMEN LED TYPE A19 LAMPS WITH DOOR-ACTUATED SWITCH.

- 120 V AC, 20 A HOSPITAL GRADE GFCI RECEPTACLE MOUNTED INSIDE THE CONTROL CABINET.

- PTC RESISTOR DESIGN ENCLOSURE HEATERS WITH INTEGRAL FANS, AND INDUSTRIAL GRADE

HUMIDISTAT / THERMOSTAT CONTROL.

- FOLD-DOWN MAINTENANCE TRAY ON INSIDE OF CONTROL CABINET DOOR.

• NAMEPLATES: CAST BRONZE OR STAINLESS STEEL; IEEE C57.12.00, TABLE 7, INCLUDING MANUFACTURING DATE, PLANT LOCATION, GOVERNMENT CONTRACT NUMBER, PRESSURE AND VACUUM THE TANK WILL WITHSTAND, AND CALCULATED X/R RATIO. AN ADDITIONAL DIAGRAM NAMEPLATE FOR SLING LOCATIONS AND LIFT POSITIONS SHALL ALSO BE PROVIDED. EQUIPMENT NAMEPLATES SHALL BE PROVIDED FOR THE HIGH-VOLTAGE BUSHINGS AND LOW-VOLTAGE BUSHINGS MADE OF STAINLESS STEEL WITH BLACK LETTERING. DEVICE NAMEPLATES WITHIN THE CONTROL AND POWER CABINETS SHALL BE ANODIZED ALUMINUM OR STAINLESS STEEL WITH ENGRAVED BLACK

LETTERING.

FACTORY ASSEMBLY AND PAINT:

• ASSEMBLY: TRANSFORMER TO BE FULLY ASSEMBLED, WITH REMOVABLE COMPONENTS

MATCH-MARKED FOR EASE OF REASSEMBLY.

• EXTERIOR PAINT: PRIMER COAT, EPOXY BASE COAT, POLYURETHANE TOP COAT

( MUNSELL 5BG 7/0.4 HIGH-GLOSS) . CORROSION RESISTANT SURFACES, AND

STAINLESS STEEL CABINETS, SHALL REMAIN UNPAINTED. COVER TO RECEIVE A NON

SLIP COATING.

• INTERIOR PAINT: PRIMER COAT, OIL-RESISTANT FINISH COAT - WHITE. ALLOW TO CURE

FOR ONE WEEK PRIOR TO OIL FILLING.

• INSPECTIONS: GOVERNMENT INSPECTIONS PERFORMED DURING

( 1) DESIGN REVIEW MEETING

( 2) AFTER COMPLETION OF WINDINGS BUT PRIOR TO LANDING ON CORE

( 3) COMPLETED CORE/COIL ASSEMBLY, BUT PRIOR TO TANKING

( 4) COMPLETELY ASSEMBLED AND WITNESSING OF FACTORY ACCEPTANCE TESTS

FACTORY ACCEPTANCE TESTS ( F.A.T.)

• ALL 'ROUTINE' TESTS ( IEEE C57.12.00, TABLE 17)

• TEMPERATURE RISE TESTS SHALL BE PERFORMED AT EACH COOLING STAGE FOR BOTH HIGH'

RATINGS ON ONE TRANSFORMER

• LIGHTNING IMPULSE TESTS

• AUDIBLE SOUND LEVEL TESTS SHALL BE PERFORMED ON ONE TRANSFORMER

• INDUCED VOLTAGE TEST ACCEPTANCE CRITERIA: 7,200 CYCLE ENHANCEMENT LEVEL:

500 PC; ONE HOUR LEVEL: 300 PC

• LEAKAGE REACTANCE (WITH ELECTRONIC DATA FILES)

• SWEEP FREQUENCY RESPONSE ANALYSIS ( WITH ELECTRONIC DATA FILES)

- CABLE INTEGRITY TEST REQUIRED

- ONE SFRA TEST TO BE PERFORMED WITH THE TRANSFORMER FULLY ASSEMBLED

AND OIL FILLED

- ONE SFRA TEST TO BE PERFORMED WITH THE TRANSFORMER IN THE SHIPPING

CONFIGURATION

• DE-ENERGIZED TAP CHANGERS MECHANICAL OPERATIONAL TEST ( 5 COMPLETE CYCLES)

• ALL ELECTRICAL AND ELECTO-MECHANICAL DEVICES SHALL BE FUNCTIONALLY TESTED

• EACH HIGH-VOLTAGE AND HIGH-VOLTAGE NEUTRAL BUSHING SHALL UNDERGO

CAPACITANCE AND POWER FACTOR TESTS DURING TRANSFORMER F.A.T.

• BUSHING CURRENT TRANSFORMER ROUTINE TESTS

• ANALOG TEMPERATURE GAUGE FUNCTIONAL VERIFICATION

SPARE PARTS:

• ( QTY 1) : 230 KV HIGH-VOLTAGE WINDING BUSHING

• ( QTY 1) : 25 KV HIGH-VOLTAGE NEUTRAL BUSHING

• ( QTY 1) : 25 KV LOW-VOLTAGE WINDING BUSHING

• ( QTY 3) : STORAGE STANDS FOR ALL SPARE BUSHINGS

• ( QTY 1) : COMPLETE GASKET SET

• ( QTY 2) : SET OF GASKETS FOR TRANSFORMER REASSEMBLY

• ( QTY 1) : COMPLETE SPARE ANNUNCIATOR DEVICE

• ( QTY 1) : RELAY AND CONTACTOR OF EACH TYPE AND RATING

• ( QTY 1) : PRESSURE RELIEF DEVICE

• ( QTY 1) : PRESSURE RELIEF DEVICE SEAL KIT AND RECOMMENDED SPARE PARTS KIT

• ( QTY 1) : ELECTRONIC PRESSURE MONITOR AND ONE PRESSURE TRANSDUCER

• ( QTY 1) : TRANSFORMER TEMPERATURE MONITOR MODULE OF EACH TYPE

• ( QTY 1) : LIQUID LEVEL INDICATOR

• (QTY 1) : WINDING TEMPERATURE INDICATOR

• (QTY 1) : OIL TEMPERATURE INDICATOR

• ( QTY 1) : BUSHING CURRENT TRANSFORMER OF EACH TYPE AND RATING

• ( QTY 2) : COOLING FAN COMPLETE WITH MOTOR

• ( QTY 1) : CRATED RADIATOR COMPLETE WITH INLET AND OUTLET ISOLATING VALVES

• ( QTY 3) : FIBER OPTIC EXTENSION CABLE

• ( QTY 1) : FUSE OF EACH TYPE AND RATING

• ( QTY 1) : PRESSURE REGULATOR FOR NITROGEN EQUIPMENT

• ( QTY 1) : VALVE OF EACH TYPE

US Army Corps of Engineers®

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