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Unit Substation Transformers5 and 15 KV Class

Bulletin7750-00

ISOISO9002

Registered

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Federal Pacific Transformer CompanyFederal Pacific Transformer HistoryDuring 1987, the Electro-Mechanical Corporation acquired the dry-type transformer division of Federal Pacific Electric in DesPlaines, Illinois. It was moved to Bristol, Virginia and the name was changed to Federal Pacific Transformer Company (FPT). Anew 100,000 square foot facility was constructed where time-proven designs and modern technology are combined and em-ployed by the new management. Expansion in early 1993 provided an additional 36,000 square feet of manufacturing space.

FPT TodayFederal Pacific Transformer Company is a major manufacturer of dry-type transformers which serve the industrial, construction,commercial, mining, OEM and utility markets. The product scope is 50 VA through 10,000 KVA and120 through 34,500 volts.The 600 volt class offering includes industrial control transformers, encapsulated/compound-filled general purpose and buck-boost transformers, ventilated designs for general purpose applications, electrostatically shielded transformers and a completeline of motor drive isolation transformers. The high voltage offering includes core and coil transformers, general purpose de-signs, padmount transformers, unit substation transformers, vacuum pressure impregnated transformers (VPI), and VPI/epoxyshielded transformers. K-Factor rated transformers are offered for the entire product scope.

DistributionA 35,000 square foot National Distribution Center was added in 1992. Additionally, regional warehouse stocks have beenimplemented in 19 strategic locations across the United States.

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Table of Contents

Federal Pacific Transformer Company . . . . . . 2

Full Load Current Tables . . . . . . . . . . . . . . . . 3

General Information . . . . . . . . . . . . . . . . . . . . 4

Transformer Features . . . . . . . . . . . . . . . . . . . 5

Core and Core Assembly . . . . . . . . . . . . . . . 6-7

Rating Information . . . . . . . . . . . . . . . . . . . . . 8

Forced Air Cooled System . . . . . . . . . . . . . . . 9

Indoor Construction . . . . . . . . . . . . . . . . . . . 10

Outdoor Construction . . . . . . . . . . . . . . . . . . 10

Unit Substation Arrangements . . . . . . . . . . . 11

Primary Switch Ratings . . . . . . . . . . . . . . . . 12

Dimensions and Weights . . . . . . . . . . . . . 13-14

Specification Guide . . . . . . . . . . . . . . . . . . . 15

Page Page

Full Load Current RatingsThree Phase Self-Cooled Transformers

2400V 4160V 4800V 7200V 12000V 12470V 13200V 13800V 14400V112-1/2 27.1 15.6 13.5 9.0 5.4 5.2 4.9 4.7 4.5

150 36.1 20.8 18.1 12.0 7.2 7.0 6.6 6.3 6.0225 54.2 31.3 27.1 18.1 10.8 10.4 9.9 9.4 9.0300 72.3 41.7 36.1 24.1 14.5 13.9 13.1 12.6 12.0500 120.0 69.5 60.2 40.1 24.1 23.2 21.9 20.9 20.1750 181.0 104.0 90.3 60.2 36.1 34.8 32.8 31.4 30.1

1000 241.0 139.0 120.0 80.3 48.2 46.4 43.8 41.9 40.11500 361.0 208.0 180.0 120.0 72.3 69.6 65.7 62.8 60.22000 482.0 278.0 241.0 161.0 96.3 92.7 87.6 83.8 80.22500 602.0 347.0 301.0 201.0 120.0 116.0 109.0 105.0 100.03000 723.0 417.0 361.0 241.0 145.0 131.0 131.0 126.0 120.0

KVA RatingPrimary Full Load Current (Amperes)

208V 240V 480V 600V112-1/2 312 270 135 108

150 416 360 180 144225 625 540 270 216300 833 722 361 289500 1389 1204 602 481750 2084 1806 903 722

1000 2779 2408 1204 9631500 4169 3612 1806 14452000 5558 4817 2408 19272500 6948 6021 3011 24083000 8337 7225 3613 2890

KVA Rating

Secondary Full Load Current (Amperes)

1000Three-Phase KVA =

Volts x Load Amperes x 1.73

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General Information

DescriptionFederal Pacific unit substation trans-formers are available in a wide varietyof types and ratings to provide reliableand versatile electrical distribution.

The changing needs and variable loaddensities of industrial and commercialpower systems create the need to lo-cate transformers close to the electri-cal center of the load — providingflexibility for change and economicaldistribution of power.

Federal Pacific dry-type transformersare ideally suited for these applica-tions. The ventilated air-cooled con-struction eliminates the concern forcontamination and toxicity of coolingliquids. They do not require the ex-pensive vaults, fluid leakage contain-ment provisions, or fire protectionsystems needed for liquid filled unitsto satisfy National Electric Code re-quirements.

Lower installed costs and minimummaintenance requirements make Fed-eral Pacific Dry-Type SubstationTransformers an ideal choice for newor existing installations.

Transformers are available in threephase ratings form 112-1/2 KVA to3000 KVA. All standard primary andsecondary voltage ratings are providedto match load requirements to the dis-tribution system.

Units can be arranged for standard di-rect connection to high voltage andlow voltage distribution protectiveequipment or provided as individualtransformers.

Industry StandardsFederal Pacific Unit Substation Trans-formers are designed and tested in ac-cordance with the following stan-dards:

• ANSI C57.12 General Requirements forDistribution, Power and RegulatingTransformers.

• NEMA 210 Secondary Unit Substa-tions.

• NEMA ST-20 Dry-Type Transformersfor General Applications.

• NEMA TR-27 Commercial, Institu-tional and Industrial Dry-Type Trans-formers.

Tested PerformanceA high level of transformer reliabilityfor trouble-free installation and opera-tion, all transformers manufactured byFederal Pacific are tested in accor-dance with NEMA and ANSI Stan-dards:

Ratio Test is performed on rated volt-age connection and tap connections toassure proper turns ratio on all con-nections.

Polarity Test and phase relation testsare made to ensure proper polarity andmarking because of their importancein paralleling or banking two or moretransformers.

No-load (excitation) Loss Test deter-mines the losses of a transformerwhich is excited at rated voltage andfrequency, but which is not supplyinga load. Transformer excitation lossconsists mainly of the iron loss in thetransformer core.

Load Loss Test determines theamount of losses in the transformerwhen carrying full rated load. Theselosses consist primarily of I2R lossesin the primary and secondary windingand ensure that specifications of thetransformer design are met.

Excitation Current Test determinesthe current necessary to maintaintransformer excitation.

Resistance Test is performed on thetransformer windings and is used todetermine I2R loss.

Impedance Test is made to insurethat transformer design standards areattained.

Dielectric Test (applied and inducedpotential) checks the insulation andworkmanship to demonstrate that thetransformer has been designed andmanufactured to meet the insulationtests required by the standards.

Applied Potential Tests are made byimpressing between windings and be-tween each winding and ground, a lowfrequency voltage in accordance withthe following:

Induced Potential Tests call for over-exciting the transformer by applyingbetween the terminals on one windinga voltage of twice the normal voltagedeveloped in the winding for a periodof 7200 cycles.

Rated Voltage of Winding, Volts

Test Potential, RMS kV

250 4.0600 4.02500 4.05000 10.08700 19.0

15000 31.015000 (95kv BIL) 34.0

Complete Testing and Detailed Inspection

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Transformer Features

Features of Typical 15 KVSubstation Transformer

� Round cylindrical coils assureproper ventilation and provide me-chanical strength for fault stresses.The units are either barrel wound ordisc wound (depending on voltage)using aluminum conductor with in-sulated coil supports.

≠ Core structures are fabricated in a"stepped" configuration from spe-cial high-grade, cold rolled, grain-oriented silicone steel. The steellaminations are clamped at the topand bottom to absorb verticalstresses on the core.

➂ 220°C insulation systems usingNomex® paper and resin glass lami-nates provides long operating lifeand quiet operation. The completecore and coil assembly is impreg-nated with polyester varnish andoven cured to make the assemblyhighly resistant to moisture.

√ High dielectric interphase barriersassure positive phase to phase insu-lating characteristics.

➄ High voltage tap connections areeasily accessible by removal offront panels. The centrally locatedtaps are changed by moving jump-ers between connection pointswhen the transformer is de-ener-gized.

≈ Rugged enclosure base with provi-sions for lifting, jacking, towing,skidding or rolling for installation.

∆ Rigidly braced low voltage bus barsarranged for proper electrical con-nections to the transformer. Thelow voltage bus is equipped withflexible connectors to the core andcoil assembly to reduce transmis-sion of vibration to the connectedequipment.

➇ Diagrammatic nameplate providescomplete rating and connection in-formation.

� Vibration isolation pads isolatecore and coil assembly from thebase structure to reduce sound lev-els.

µ Optional fan cooling equipment toprovide an additional 33-1/3%KVA capacity for units with self-cooled ratings of 300 KVA andabove. (Provisions for future forcedair cooling are provided as standard— including sufficient current-car-rying capacity on internal bus bars.)Fans and controls can be installedat the factory or can be shipped forinstallation at the jobsite.

Winding Temperature Indication

As an optional feature, transformers rated300 KVA and above can be supplied withdial-type winding temperature indicator tosupply the operator an indication of loadconditions. The dial has a red drag pointerthat is positioned by a white temperatureindicator. The red pointer indicates maxi-mum winding temperature obtained whilethe white pointer registers the actual tem-perature of the windings.

Winding Temperature Indicator

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Coil ConstructionCoils are precision wound in a circularconfiguration using aluminum conduc-tor material as standard. Copper con-ductors can also be provided as an op-tion.

Where possible, sheet-wound second-ary windings are used separated by in-sulation layers and spacers. The sheetwindings offer the advantage of virtu-ally eliminating axial short circuitstresses.

The insulated wire-wound primarywindings are placed directly over thesecondary windings with a suitable in-sulating barrier between the coils con-sisting of spacers and sheet insulationapplied to the proper thickness. Pri-mary windings may be random-woundor disc-wound depending upon the de-sign requirements and all coils are ad-equately braced for full short circuitcapability.

Core and Coil Assembly

Core ConstructionThe transformer cores are made ofhigh grade non-aging, grain oriented,cold-rolled silicon steel laminationswith high magnetic permeability. Pre-cision steel cutting machines are usedto cut the steel laminations with pre-cise squareness and to be free of burrs.

Laminations are hand stacked to com-puter generated specifications to as-sure correct positioning for close fit-ting joints to minimize noise and coreloss. Each lamination has an insulatingcoating bonded to both sides to mini-mize eddy-current losses.

The core legs are arranged in a"stepped" configuration to accommo-date the coils and to provide maximumcooling and strength. The completedthree-leg core assembly is rigidlyclamped with steel members to pre-vent movement and to provide supportfor the coils.

AssemblyThe completed coil units are placed onthe core legs and top core yokes areput into place and securely clamped.Electrical connections are made usingwelded aluminum or brazed copper,wherever possible, to ensure reliableservice.

After installation of the mountinghardware, the complete core and coilassembly is submersed and impreg-nated with an insulating varnish. Theassembly is completely coated to pro-vide moisture and dirt resistance aswell as high dielectric strength. Afterdipping, the varnish is fully cured in adrying oven.

Completed core and coil assembliesreceive a final inspection and testingprior to installation in the enclosure.When installed, vibration isolationpads are provided to isolate the coreand coil assembly from the base struc-ture. All structural parts are groundedto prevent induced voltage buildup.

Round Coil and Stepped Core Construction Precision Wound Coils

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Core and Coil Assembly

ConstructionFPT transformers utilize a 220° Cinsulation system that combinesinorganic materials and resins toprovide a fire resistant, high dielectriccapability. All materials have beenthoroughly tested and proven withrespect to their stability at requiredoperating temperatures.

The major components of the 220° Csystem include Nomex® paper forconductor insulation plus resin-glasslaminates, silicon rubber and polyestervarnish. The combination of materialsis specifically chosen to assure longoperating life and quiet operations®Registered Trademark Dupont Co.

TapsPrimary windings are furnished withfull capacity tap connections toprovide adjustment to accommodatevariations in the incoming highvoltage. All units include, as standard,two (2) 2-1/2% taps full capacityabove normal (FCAN) and two (2) 2-1/2% taps full capacity below normal(FCBN).

The tap connections are located in avertical arrangement on the side ofeach coil. Accessible behindremovable covers, the taps can easilybe changed by moving jumpersbetween connection points when thetransformer is de-energized.

220° C Insulation System Complete Core and Coil Assembly

HV Tap Connections

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Rating Information

BIL (Basic Insulation LevelDesigns can be furnished to meet in-dividual system requirements. FederalPacific construction incorporates highshort-circuit capabilities with the fol-lowing BIL ratings:

The standard rating for 15 KV classdry-type transformers is 60 KV BIL.

Federal Pacific designed anddeveloped the Hi-Pulse VentilatedDry-Type Transformer which has abasic insulation level of 95 KV BIL.The application of a Hi-PulseTransformer in a 15 KV installationeliminates the potential weak-link andprovides 58% additional surgeprotection over the conventional 60KV BIL dry-type transformer. The 95KV BIL ventilated dry-typetransformer provides a fully rated, airinsulated 15 KV installation

(Delta) 60Hz

+5% +2-1/2% -2-1/2% -5%

2400 2520 2460 2340 2280

4160 4360 4260 4055 3950

4800 5040 4920 4680 4560

6900 7245 7070 6730 6555

7200 7560 7380 7020 6840

12000 12600 12300 11700 11400

12470 13095 12780 12160 11845

13200 13860 13530 1870 12540

13800 14400 14100 13500 13200

High Voltage Ratings

High Voltage Taps (Volts at Rated KVA)

Self Cooled (AA)

Forced Air Cooled (FA)

Self Cooled (AA)

Forced Air Cooled (FA)

112-1/2 — 112-1/2 —150 — 150 —2.25 — 225 —300 300/400 300 300/400500 500'667 500 500/667750 750/1000 750 750/1000

1000 1000/1333 1000 1000/13331500 1500/20002000 2000/26672500 2500/33333000 3000/4000

Low Voltage Ratings 60 Hz

208Y/120 240

480Y/277 480\ 600\

KVA Ratings

Three Phase Transformer Standard Ratings

Transformer Nominal Impedance and Sound Levels

Primary Voltage

Class

NEMA Standard

BIL

FP Standard

BIL

FP Hi-Pulse

BIL

2.5 KV 20 KV 25 KV —

5.0 KV 30 KV 30 KV —

7.2 KV 35 KV 35 KV 95

15.00 KV 60 KV 60 KV 95

Temperature RiseThe rated KVA of a transformer is theoutput based on average winding tem-perature rise above 40° C maximumambient. Standard transformers are de-signed to operate with a 150° C tem-perature rise.

Designs are optionally available witheither 80° C or 115° C rise that canprovide long life performance with

5 KV Class (30 kV BIL)

15KV Class (60kV BIL)

Self Cooled (AA) Average

Forced Air Cooled (FA) Average

112-1/2 55 —

150 58 —

2.25 58 —

300 5.00 5.00 58 67

500 5.75 5.75 60 67

750 5.75 5.75 64 67

1000 5.75 5.75 64 67

1500 5.75 5.75 65 68

2000 5.75 5.75 66 69

2500 5.75 5.75 68 71

3000 5.75 5.75 68 71

KVA

Percent Impedance — 3 Phase

Audible Sound Levels (db)

Consult Factory

Consult Factory

lower losses and minimize operatingcosts on systems with a continuoushigh loading operation.

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Forced Air Cooled System

Forced-Air Cooled SystemOperationUnit substation transformers with self-cooled ratings of 300 KVA and abovecan be supplied with fans and controlsto obtain additional KVA capacity.Forced circulation of air correctlyapplied permits the self-cooled KVArating of the transformer to beincreased by an additional 33-1/3%.(Class FA rating)

The winding temperature control panelis equipped with necessary controlsfor the operation of the fans:1. Winding temperature indicator2. Fan position test switch3. Temperature sensing device4. Fuses5. Green light (auxiliary power "On")6. Amber light (fan operation)7. Red light (excessive temperature)

The winding temperature indicator isfurnished with three (3) sets ofnormally open contacts. Each contactcloses as the average windingtemperature reaches factory presettemperature values.

Sequence of operation is as follows:

1. When the winding indicator reaches190° C (based on 150° C averagewinding temperature in a maximum40° C ambient) contact #1 closes.The fan relay is energized whichcloses the fan-relay contact. Thefans operate resulting in 33-1/3%additional KVA capacity.

2. Should the temperature keepincreasing and the white indicatorreaches 200° C, contact #2 closes.The red light and remote alarm (ifconnected) operate.

3. A further increase in windingtemperature causes contact #3 toclose when the indicator reaches210° C. Contact #3 can be used totrip the primary or secondary mainbreaker.

Typical Fan Alarm and Trip Control Schematic Diagram

Standard Winding Temperature Control Panel

Optional Solid State Control Panel (Three-coiltemperature sensing)

Core and Coil Assembly 15 KV Class, Fan Cooled

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Indoor/Outdoor Construction

Indoor ConstructionIndoor transformers are provided withheavy gauge steel ventilatedenclosures finished with light graypaint. Units are sized to assure properair circulation for cooling and arearranged for direct connection to highand low voltage protective equipmentor terminal compartments as required.

Removable front and rear coversprovide access for inspection ormaintenance and for de-energized tapchanging. The transformer baseincludes provisions for lifting, jacking,skidding or rolling the unit forinstallation.

Outdoor ConstructionFPT dry-type transformers are alsoavailable in outdoor weather resistantconstruction with the same ratings,features and flexibility of indoor units.The weather resistant enclosureincorporates special baffled louvers.Covers and doors are gasketed andspace heaters are included. Core andcoil assemblies utilized in outdoorunits are given an additional varnishdip for added protection. Temper-resistant construction can be provided,as an option, so that only authorizedpersonnel with proper tools haveaccess to the interior.

Indoor Transformer

Outdoor Transformer with Primary Switch

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ArrangementsFPT Unit Substation Transformersmeet a wide variety of application re-quirements with the highest degree ofservice reliability. A standard FPTSubstation is an assembly of an in-coming power section, a transformersection, and a low voltage outgoingpower section. FPT substations are co-ordinated, engineered electrical cen-ters designed to safely step down dis-tribution voltage to utilization voltage.It usually supplies electrical utilizationvoltages ranging from 208Y/120 to600 volts from a primary voltage of2400 to 13,800 volts. They typicallysupply power in industrial plants, of-fice buildings, commercial buildings,public buildings, hospitals andschools. The form, rating, and charac-teristics of unit substations and theirtransformers are determined by the de-sign of the electrical distribution sys-tem and the requirements of the par-ticular loads and installation condi-tions.

Incoming Line AirInterrupter SwitchThe Type LI air interrupter switch,two position (open-close), three polewith manually operated, stored-energymechanism provides quick-make,quick-break operation for disconnect-

Unit Substation Arrangementsing the transformer incoming line. Uti-lized with power or current limitingfuses, the switch provides safe, fast,and reliable protection for high volt-age circuits. The LI switch is rated600 amp continuous, 600 amp load-break with a high fault closing capac-ity of 40,000 amp asymmetrical.

The switch compartment is bolted di-rectly to the high voltage side of thetransformer section. The switch com-partment is provided with removablerear panels for access to terminal con-nections. Cable entrance can be at topor bottom for either single or loopfeed. Fuses, when specified, are lo-cated in a compartment under the in-terrupter switch. A hinged door allowsaccess to fuses and is provided with amechanical interlock to prevent thedoor opening unless the switch is inthe "open" position. Standard fuses,when supplied, are the current limit-ing, non-disconnect type. Lightningarresters and key interlocks are option-ally available.

Incoming Line TerminalCompartmentWhen a disconnect or overcurrent de-vice is not required as an integral partof the lineup, an air-filled terminalcompartment is bolted directly to thehigh voltage end of the transformer

section. The metal-enclosed terminalcompartment matches the height anddepth of the transformer section and isprovided with bolt-on end panels foraccessibility to terminal connections.The compartment can be arranged forsingle or loop feed with potheads orclamp-type terminals for either top orbottom cable entrance. Lightning ar-resters can be supplied when requiredfor protection against voltage surges.

Low Voltage DistributionSectionsA complete selection of distributionand protective equipment is availableto meet application requirements. Unitsubstation transformers are arrangedfor direct connection to a variety ofFPT equipment including low voltagedrawout switchgear, distributionswitchboards, group mounted powerpanelboards and motor control centers.

For those applications where second-ary distribution equipment is not re-quired, an outgoing air-filled terminalcompartment can be provided for topor bottom cable entrance. The com-partment bolts directly to the trans-former and has removable end panelsfor accessibility. Provisions can alsobe made to accommodate busway.

Load Interrupter Switch

Air-Filled TerminalCompartment with Clamp-

Type Terminals andLightning Arresters

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Primary Switch Ratings

60 Hz KV

BIL KV

40,000 40,000 25,00061,000 61,000 38,00040,000 40,000 25,00061,000 61,000 38,000

6005.0 19 60 600

Momentary Asym. Amps

3-Second Short-Time Sym. Amps

Voltage Ratings Current Ratings

WithstandMaximum

Design KV

Continuous Amps

Interrupting Amps

Fault Closing Asym. Amps

15.0 36 95 600600

Type LI Load Interrupter Switch Ratings

Suggested Minimum Current Limiting Fuse Ratings for Three Phase Self-Cooled Dry-Type Transformers*

G.E. West. G.E. West. G.E. West. G.E. West. G.E. West.112-1/2 40E 25E 30E 15E 20E 8E 20E 8E 20E 8E

150 40E 30E 40E 18E 20E 10E 20E 10E 20E 10E225 65E 45E 50E 25E 30E 15E 30E 15E 30E 15E300 80E 60E 65E 35E 40E 25E 40E 20E 40E 18E500 125E 100E 100E 60E 65E 40E 65E 30E 65E 30E750 150E 150E 125E 100E 80E 60E 80E 45E 80E 45E

1000 200E 200E 150E 125E 100E 75E 100E 65E 100E 60E1500 300E 300E 200E 200E 125E 100E 125E 100E 125E 100E2000 375 400X — 250E 150E 150E 150E 150E 125E 125X2500 400 600E — — 175E 175E 175E 175E 150E 175E

12470 V 13200 V 13800VKVA

4160 V 7200 V

LIghtning Arrester Application (Distribution Type)

Grounded System KV Ungrounded System KV

3 4.16 2.46 7.2 4.89 12.5 9.012 15.0 12.015 18.0 15.0

Maximum Phase to Phase VoltageArrester KV Rating

*Fuse selections are based on recommendations of the listed fuse manufacturers and are minimum sizes suggested to allow for transformermagnetizing current inrush. Ratings are shown for the following types:

General Electric Co. — Type EJ-1 and EJO-1Westinghouse Electric Co. — Type CLE

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Dimensions and Weights

Typical Dimensions and Weights

90" 106-1/2"Clamp-type 12 215 —Clamp-type with Lightning Arresters 12 310 —Pothead (3/1/C or 3/C) 12 300 —Clamp-type 19 275 340Clamp-type with Lightning Arresters 19 330 395Pothead (3/1/C or 3/C) 19 375 440

Voltage Class

5 KV

15 KV

Compartment HeightApprox. Weights (lbs.)

Width (Inches)Cable Termination

Air-Filled Terminal CompartmentThe depth and height of the air-filled terminal compartment will match the transformer.

The LI Interrupter Switch CompartmentThe depth of the switch compartment will match the transformer.

Voltage Class

Cable Termination Width (Inches) Approx. Weights (lbs.)

Two position switch and fuse 32 1000Two position switch and arresters 32 900Two position switch, fuses and arresters 32 1035Two position switch and fuse 38 1200Two position switch and arresters 38 1080Two position switch, fuses and arresters 38 1255

5 KV

15 KV

Incoming Line Section

L.V. Outgoing Line Section

90" 106-1/2"600V Clamp-Type 14 350 440

Voltage Class

Compartment HeightApprox. Weights (lbs.)

Width (Inches)Cable Termination

Air-Filled Terminal CompartmentThe depth and height of the air-filled cable terminal compartment will match the corresponding ventilateddry-type transformer dimensions.

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Dimensions and Weights

Typical Transformer Dimensions and Weights*

H" W" D"Approx.

Wt. (lbs.)

H" W" D"Approx.

Wt. (lbs.)

112-1/2 90 53 50 2385 90 64 50 2950

150 90 53 50 2385 90 64 50 2950225 90 53 50 2385 90 64 50 2950300 90 64 50 2385 90 64 50 2950500 90 64 50 3065 90 72 50 3700750 90 64 50 3810 90 72 50 48001000 90 64 50 4635 90 78 50 57001500 90 72 50 6220 90 86 60 75002000 90 78 50 7830 90 86 60 92002500 90 78 60 9340 106-1/2 86 60 105503000 90 86 60 10630 106-1/2 86 60 11820

5 KV Class 15 KV Class

KVA

150° C Rise

H" W" D"Approx.

Wt. (lbs.)

H" W" D"Approx.

Wt. (lbs.)

112-1/2 90 53 50 2600 90 64 50 3200

150 90 53 50 2600 90 64 50 3200225 90 53 50 2600 90 64 50 3200300 90 64 50 2600 90 64 50 3200500 90 64 50 3325 90 72 50 4010750 90 64 50 4180 90 72 50 52601000 90 64 50 5080 90 78 50 61851500 90 72 50 6725 90 86 60 81002000 90 78 50 8420 106-1/2 86 60 101202500 90 86 60 10230 106-1/2 86 60 115403000 90 86 60 11645 106-1/2 94 60 12850

5 KV Class 15 KV Class

KVAH" W" D"

Approx. Wt.

(lbs.)H" W" D"

Approx. Wt.

(lbs.)112-1/2 90 53 50 2775 90 64 50 3450

150 90 53 50 2775 90 64 50 3450225 90 53 50 2775 90 64 50 3450300 90 64 50 2775 90 72 50 3450500 90 64 50 3575 90 72 50 4290750 90 64 50 4450 90 78 50 55451000 90 72 50 5575 90 86 60 66801500 90 78' 50 7305 90 86 60 87102000 90 78 50 9160 106-1/2 94 60 110002500 90 86 60 11540 106-1/2 94 60 122753000 90 86 60 12400 106-1/2 94 60 13570

5 KV Class 15 KV Class

KVA

115° C Rise 80° C Rise

*Data based on standard aluminum wound indoor transformer.

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Specification Guide

The transformer shall be ventilated,dry-type construction cooled by thecirculation of air through the wind-ings.

The unit shall be mounted in an indoor(outdoor) enclosure finished in themanufacturer's standard light graypaint with provisions for direct con-nection to the primary and secondaryequipment specified.

The transformer shall be designed,manufactured, and tested in accor-dance with the applicable NEMA,ANSI, and IEEE standards

RatingThe transformer shall be rated as fol-lows:

KVA ________ self-cooled, AA

_______ future, forced-air, FFA(forced-air, FA)

Phase: 3

Hertz: 60

High Voltage __________ delta

Low Voltage __________ wye (delta)

HV taps: Full capacity with 2-2-1/2%above and below rated high voltage.

BIL: ________________ KV

Maximum Temperature Rise: 150°C(115° C) (80° C)

Conductor MaterialThe conductors shall be an electricalgrade aluminum (copper).

Insulation MaterialsAll insulation materials for the pri-mary and secondary coil assemblyshall be rated for continuous 220° Ctotal temperature (Class H).

Core and Coil AssemblyThe core shall be constructed of non-aging, cold-rolled, grain oriented, highpermeability silicon steel. All corelaminations shall be free of burrs andstacked without gaps. The core fram-ing structure shall be of rigid construc-tion to provide full clamping pressureupon the core and provide the supportpoints for the coils.

The HV and LV coils shall be cylin-drically wound as an assembly withthe HV coil wound directly over theLV coil. Coils shall be adequatelybraced for full short circuit capability.

The complete core and coil assemblyshall be varnish impregnated and ovencured.

Vibration dampening pads shall beprovided to isolate the core/coil as-sembly from the base structure.

High Voltage TapsTap leads shall be terminated at thecoils and equipped with provisions forchanging taps under de-energized con-ditions.

EnclosureThe enclosure shall be constructed ofheavy gauge sheet steel equipped withremovable parts for access to the coreand coils on the front and rear. Venti-lated openings shall be furnished tomeet NEMA standards. The enclosureshall include provisions for rolling,skidding, lifting, and jacking for in-stallation.

Sound LevelThe transformer shall be designed tomeet the sound level standards for dry-type transformers as defined in ANSIC89.2.

Forced-Air Cooling (optional)A complete forced-air cooling systemshall be provided for automatically in-creasing the self-cooled rating by 33-1/3%. The system shall contain 120VAC single phase fans and a controlpanel with indicating lights, tempera-ture indicator, fan position test switch,and alarm mode selector switch.

AccessoriesAccessories shall include, but not belimited to:

• HV flange

• LV flange

• Provisions for lifting, jacking, androlling

• Termination arrangements

• Provisions for grounding

• Siagrammatic nameplate

TestsThe following tests shall be performedon each unit in accordance with ANSIC57.12.91:

• Resistance measuremetns

• Ratio tests

• Polarity and phase-relation tests

• No-load loss and excitation current

• Impedance and load-loss

• Applied potential tests

• Induced potential tests

The dry-type transformer shall be asmanufactured by Federal PacificTransformers Company.

16 FPTS-515-1200

Old Airport Road Industrial ParkP. O. Box 8200 • Bristol, Virginia 24203-8200

540-669-4084 • FAX 540-669-1869http://www.federalpacific.com

600 Volt and Below Dry-Type Transformers•Encapsulated/compound filled transformers•Industrial Control Transformers•Buck-Boost Transformers•General purpose, lighting and control power transformers•Open core and coil transformers•Electrostatically shielded transformers•Motor drive isolation transformers•Energy saving 115° C and 80° C designs•K-Factor transformers•Wall mounting, dripshield and terminal lug accessories

High Voltage Dry-Type Transformers•Core and coil transformers•General purpose transformers•Outdoor designs•Unit substation transformers•Motor drive isolation transformers•K-Factor transformers•Padmounted transformers•Vacuum pressure impregnation (VPI) transformers•VPI/epoxy shielded transformers•UL® listed high voltage transformers

Cast Coil Transformers

Specialty Transformers•FPT will custom engineer your specialty transformer requirements.

EPA Energy Star Compliant Transformers•Commercial and industrial low voltage transformers compliant withEPA Energy Star Efficiency Guidelines.

Other Products Available

Printed in the U.S.A.

© 2000 Federal Pacific

Every effort is made to ensure that customers receive up-to-date literature;however, from time to time, modifications to our products may without noticemake the information contained herein subject to alteration.