transformador pad mounted

8/9/2019 transformador pad mounted

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CA08104001E For more information, visit: www.eaton.com/consultants

September 2011

Contents

Pad-Mounted Transformers17

Sheet 17001

P a

d - M o

u n t e

d

T r a n s f o

r m e r s

Pad-Mounted Transformers

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Industry Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Design Impedances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Application Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-2

Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-3

Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-3

Transformer Cooling Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-4

NEC Requirement Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-5

Seismic Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-5

Primary Protection Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-6

Primary Switching Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-8

Loadbreak Wells and Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-9

Primary Fuse Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-10

Layout Data 75–2500 kVA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-11

Technical Data 75–2500 kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-12

Layout Dimensions 3000–5000 kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-13

Technical Data 3000–5000 kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.0-14

Specifications

See Eaton’s Product Specification Guide

, available on CD or on the Web.

CSI Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1995 2010

Section 16321 Section 26 12 19

Typical Pad-Mounted Transformer


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General Description

002

Three-PhasePad-Mounted Transformers

Typical Pad-Mounted Transformer

Introduction

Eaton’s three-phase pad-mountedtransformer is offered in a varietyof designs and configurations. Thefollowing pages describe the standarddesigns and the common options thatare available.

Some special designs and optionsmay require additional engineering,factory coordination, unusualapplication requirements orspecial manufacturing needs.

Higher impedances limit secondaryfault currents such that coordination

with secondary low voltage molded-case circuit breakers is usuallypossible. (Low impedances are alsoavailable if required for paralleling,and so on.)

Standard color is pad-mounted green[Munsell

®

Green (#7GY3.29/1.5)]. ANSI#24, 61 and 70 are available as options.

Application

Liquid-filled, three-phase, commercialpad-mounted distribution transformersare designed for servicing such under-ground distribution loads as shoppingcenters, schools, institutions and

industrial plants. They are availablein both livefront and deadfrontconstruction, for radial or loop-feedapplications, with or without taps.

Industry Standards

Pad-mounted transformers meetindustry standards: IEEE

®

C57.12.00,IEEE C57.12.34, IEEE C57.12.28, IEEEC57.12.29, IEEE C57.12.70, IEEEC57.12.80, IEEE C57.12.90, IEEE C57.91

and NEMA

®

.

Ratings

■

75–5000 kVA

■

High voltages (primary): 4160 Grd. Y/2400 2400

∆

through through 34,500 Grd. Y/19,920 34,500

∆

■

HV Taps: 2–2-1/2% above and belownormal, or 4–2-1/2% below normal

■

Standard BIL levels:

kV Class BIL (kV)

1.2 30 2.5 45 5.0 60

8.7 7515.0 9525.0 Grd. Y Only 12525.0 15034.5 Grd. Y Only 15034.5 150

■

Low voltages (secondary).All voltages through 5 kV class

■

UL labeling available

■

Factory Mutual labeling available

Design Impedances

Impedances are supplied to meetIEEE C57.12.00 standards. Customer-specified impedances are available.(Subject to IEEE/ANSI ±7.5%

impedance tolerance.)

■

Typical design impedances:

kVA %Z

75 4.00 112-1/2 4.00 150 4.00 225 4.00 300 5.00 500 5.00 750 5.751000 5.751500 5.752000 5.752500 5.753000 5.753750 5.755000 5.75

Note: Subject to NEMA/IEEE ±7.5%impedance tolerance.

Note: Non-standard design impedancemay be obtained by contacting Eaton.

Application Limitations

The transformers described herein aredesigned for the application conditionsnormally encountered on electric powerdistribution systems. As such, they aresuitable for use under the “usual service

conditions” described in IEEE StandardC57.12.00 general requirements forliquid-immersed distribution, powerand regulating transformers.

Consult Eaton for unusual serviceconditions such as:

■

Abnormal environmental conditions

■

Unusual transient voltages presenton the source voltage

■

Frequent or planned through-fault duty

■

Planned overloading unless in strictaccordance with the IEEE loadingguide (C57.91)

■

Motors whose horsepower ratingis greater than half the transformerkVA rating

■

Unusual frequency of impact loadingmay occur when supplying weldingapparatus, electric arc furnaces ormotors with cyclical loads

■

Loads involving abnormal harmonicor DC current that may resultwhere appreciable load currentsare controlled by solid-state orsimilar devices

These lists do not purport to coverall unusual conditions and applicablelimitations. Other “unusual service

conditions” are described in IEEEStandard C57.12.00.

Table 17.0-1. Temperature Guarantees

30°C average ambient temperature ofcooling air not to exceed 40°C maximumover any 24-hour period.

Degree rise is the average windingtemperature rise by resistance.

A dual temperature rating of 55°/65°C adds12% additional continuous capacity to thebase kVA rating of the transformer.

Note: Altitudes not to exceed3300 ft (1006m).

Fluids—Liquid Dielectric

The choice of fluid, mineral oil orless flammable natural esther fluid(BIOTEMP

®

, Envirotemp FR3

®

) ismade based upon site conditionsand proximity to facility walls,windows and flammable structures,and environmentally sensitive areas.

Note: For additional information abouttransformer applications and types ofinsulating fluids, see Tab 14

.

Description Ambient

Rise

StandardOptional

30°C30°C

65°C55°C


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General Description

003

Standard Features

Four lifting hooks

Bolted-on terminal compartmentwith removable front sill

Hinged, lift-off cabinet doors

Interlocked hex-head or penta-headbolt padlock handle operates a camassembly that is part of the three-point door latching mechanism

Hex-head or penta-head boltsmust be removed from the flangeformed on the steel high/lowbarrier before the HV door canbe opened—not shown

Removable neutral ground strap—not shown

Tank ground pads (1 in HV, 1 in LV)

Steel high/low voltagecompartment barrier

Nameplate

Fill plug and self-actuatingpressure relief device

Externally operated no loadtap changer

Drain valve and sampling device

Options

Primary Termination

For livefront construction, exter-nally clamped high voltage porce-lain bushings double eye-bolt orspade for cable (75–225 kVA) or asingle eyebolt or spade for cable(300–1500 kVA). Spade bushingsare also offered

For deadfront construction, exter-nally clamped high voltage epoxybushing wells for 200A loadbreak,or 600A non-loadbreak inserts

Secondary Termination

NEMA spade terminals

Primary and Secondary Compartment Features


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General Description

004

Transformer Cooling Classes

Table 17.0-2. Fluids Advantages and Disadvantages

Table 17.0-3. Fluid Properties Comparison

Advantages Disadvantages

Mineral Oil

■

Low transformer cost

■

Good dielectric performance

■

Low maintenance cost

■

Good heat dissipation

■

Good cold climate performance

■

Preventative maintenance—DGA historical data available

■

Higher installation cost

■

Vaults required for indoor installations per code low fire point—160°C

■


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General Description005

NEC Requirement Guidelinesfor the Installation of ListedLess-Flammable Liquid-FilledTransformers

NEC (NFPA) RecognitionThese guidelines focus on therequirements of Article 450.23 ofthe National Electrical Code® (NEC®)for the installation of less-flammableliquid-insulated transformers. Less-flammable liquids are used intransformers where an extra marginof fire safety is important. Typicalapplications include installationsindoors, on rooftops, near buildings,bush and forest fire prone areas andin pedestrian traffic areas.

Less-flammable liquids, also known ashigh fire point liquids, are transformerdielectric coolants that have a mini-mum fire point of 300°C. Commonlyused fire-resistant fluids includedimethysiloxane and ester-basedfluids. Two Nationally RecognizedTesting Laboratories (NRTL);Underwriters Laboratories (UL)and FM Approvals (FM) currentlylist less-flammable liquids. Theyalso list less-flammable liquid-filledtransformers.

Less-flammable liquid-filledtransformers were formally recognizedby the NEC for indoor installationin 1978. In 1990, the NEC integratedspecific less-flammable transformer

requirements for outdoor installationsfor Article 450.23, in effect recognizingless-flammable transformers asinherently safer than conventionaloil-filled transformers. Less-flammabletransformers, long recognized asan additional safeguard for indoorinstallations, are becoming increas-ingly recognized for outdoorapplications as well.

General NEC Requirements

The requirements and options for thedifferent types of outdoor installationsare outlined in Table 17.0-4. Theseguidelines also summarize the ULClassification and FM Approvals

installation requirements for less-flammable fluids referred to as“listing” requirements in NEC 450.23.

In cases where the transformerinstallation presents a fire hazard, oneor more of the following safeguardswill be applied according to the degreeof hazard involved:

1. Space requirements.

2. Fire-resistant barriers.

3. Automatic fire suppressionsystems.

4. Enclosures that confine the oil

of a ruptured transformer tank.

NEC Article 450.28, Modification ofTransformers, requires that whenmodifications are made to transformers

in existing installations that change thetransformer type, the transformersmust be marked to show the type ofinsulating liquid installed and theinstallations must comply with currentrequirements of the NEC. Examples ofchanges include replacing a completetransformer (retrofitting) or replace-ment of the liquid only (retrofilling).Askarel (PCB) and conventional mineraloil-filled transformers are frequentlyretrofitted or retrofilled using less-flammable liquids. NEC 110.34sets minimum clear work spacedimensions around transformers.

Seismic Qualification

Refer to Tab 1 for information onseismic qualification for this andother Eaton products.

Table 17.0-4. NEC Article 450.23 Requirements

Refer to NFPA 220-1999 for definition of non-combustible Type I and II building construction. Fine Print Note, Article 450.23, (B) (1) states: “Installations adjacent to combustible material, fire

escapes, or door and window openings may require additional safeguards such as those listed inArticle 450.27.”

InstallationType

NECRequirements

Outdoor Installations

Non-combustible building and nocombustible materials stored in area.

Either of the following listing requirements :■ Underwriters Laboratories

■ FM approvals

Combustible building or combustiblematerials stored in area.

In accordance with NEC Article 450.27, oil-insulatedtransformers installed outdoors, i.e., spaceseparation, fire barriers or water spray systems.


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Primary OvercurrentProtection OptionsPrimary protective devices areapplied to distribution transformersin order to:

1. Prevent injury to personnel.

2. Prevent or minimize damageto equipment.

3. Improve the continuity of serviceby selectively controlling outages.

Factors that affect the protectionscheme are:

1. Industry standard.

2. Customer’s specification.

3. Customer’s system configuration(available fault current, systemvoltage, system connection,

and so on.)

4. Availability of equipment.

The first consideration in determiningthe ampere rating of a fuse is to verifythat the fuse in question is capable ofwithstanding typical inrush currentswithout element damage. When atransformer is energized, it is exposedto very large currents for very shortperiods of time. These currents areknown as magnetizing inrush (or fusewithstand) and cold load pickup,and are a result of the transformer’smagnetic circuit, the electrical systemconfiguration and the connected load.

The second consideration for selectingthe fuse ampere rating is the maxi-mum load current the fuse is expectedto carry without damage. Transformerfusing tables available from themanufacturer normally list the rangeof overload provided. If the longtimeminimum melt current for a particularfuse size is known, it can be comparedto the transformer rated current todetermine the exact amount ofoverload permitted. An ambient of25°–40°C is generally assumed forapplication tables. Care should betaken when fuses are applied in higher

ambient conditions, which will reducethe amount of overload permitted. Anexample of a high ambient conditionused frequently in distribution trans-formers is that of current limiting fusesin dry-well canisters. To accommodatethe overload and derating factorsreferred to, the following ratios areused on general-purpose CL fuses.

Nameplate current rating of fuse/ nameplate current rating of transformer= 1.25 for enclosures surrounded byair (EFD, clip mount, arc-strangler)or = 1.35 for enclosures surroundedby oil (canisters).

Derating factors are not applied toexpulsion or backup CL fuses becausehigh temperature has minimal effecton their operation.

Finally, it is necessary to verify that thefuse current rating under consider-ation will, in fact, operate prior to thetransformer sustaining any perma-nent thermal damage (conductor orinsulation burning or melting). This isdone by comparing the total clearingcharacteristics of the fuse in questionwith the IEEE (I2t) damage line.

It is important that the total clearingcharacteristics of the device underconsideration lie to the left of thedamage line for all expected valuesof fault current. Note that most fusecharacteristics will cross the damageline at some point. It is important tomake this occur at the lowest possiblevalue of the current.

The interrupting rating of a device is ameasure of the maximum symmetricalfault current at which the device cansuccessfully clear a fault conditionwithout excessive damage to itself,the equipment it is protecting orthe surrounding environment.

It is extremely critical that theinterrupting rating of a device begreater than the maximum availablesymmetrical fault current. For devicesapplied to the transformer primary,the maximum fault current must besupplied by the utility because thisvalue is dependent on the electricalsystem configuration.

Protective Fuse Link

■ Internal, oil-immersed, expulsion type

■ Sized to operate only in the event ofa winding failure, isolating the trans-former from the primary system

■ Interrupting rating is 3500A at 8.3 kV

Protective Fuse Link

Bay-O-Net-Type Fuse

■ Oil immersed, expulsion type

■ Drawout for fuse replacement

■ Hookstick operable, loadbreak design

■ Available with either overload-sensing or fault sensing

■ 3500 AIC at 8.3 kV, 1800 AICat 15.5 kV

Bay-O-Net fuse assemblies are used toprotect transformers and distributionsystems. They are designed for use inpad-mounted or sub-surface distribu-tion transformers filled with trans-former oil or approved equivalent.The assemblies combine the easeof hotstick operation with the safetyof deadfront construction.

Removal of the fuse holder from theassembly indicates that the apparatusis electrically disconnected. It alsoallows convenient fuse elementinspection and replacement. Whentypical safety practices are followed,the assemblies can be load-breakoperated for working on thetransformer secondary; changingdistribution voltage with dualvoltage switches or tap changers;or disconnecting the apparatus fromthe line.

The optional Flapper™ Bay-O-NetAssembly (available as sidewall-mounted only) includes a flapper valveinside the housing, which closes whenthe fuse holder is removed, thusminimizing oil spillage.

Table 17.0-5. Bay-O-Net Fuse Electrical Ratings

With RTE Bay-O-Net fuse links only. Except high ampere overload links, which

are rated at 2000A symmetrical.

Bay-O-Net-Type Fuse Assembly

kVRating

Specification

Electrical Ratings

150 50

BIL and full wave crest60 Hz, AC, 1-minute withstand

Maximum Single-Phase Interrupting Ratings

8.3 3000A rms asymmetrical—

cover mount3500A rms symmetrical—sidewall mount

15.5 2500A rms asymmetrical—cover mount

2500A rms symmetrical—sidewall mount

23.0 1000A rms asymmetrical—cover mount

1000A rms symmetrical—sidewall mount

Load Break Ratings (Phase-to-Phase at 80% PF)

10.015.526.734.5

160A150A 80A 50A


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Primary Switching OptionsEaton’s oil-immersed switches areavailable for radial or loop-feedsystem switching in three currentratings. The three-phase gang-operated switch has a spring-loaded

mechanism for loadbreak and latchoperation. The switch is mounted nearthe core and coil assembly, for low cablecapacitance; and with simultaneousthree-phase switching, the possibility offerroresonance is reduced. Available inratings through 600A at 15 kV, 300A at25 kV, and 200A at 35 kV.

Figure 17.0-1. Two-Position Switch

Figure 17.0-2. Four-Position Switch(Loop Feed) “T Blade”

Deadfront Elbow Arrester

Surge ArrestersEaton distribution class surge arrest-ers are supplied on transformers whenspecified. Transformers with livefrontconfiguration have mounting nutswelded on the tank wall for arrestermounting.

Metal Oxide Varistor (MOV)Deadfront ArresterSurge protection is available withoutlosing deadfront construction in thecabinet. The Eaton type MOV arresteris completely deadfront. It is compact,and is usable wherever a loadbreakelbow can be used.

The highly nonlinear characteristicsof the varistor elements provide moreprecise and predictable operatingcharacteristics. The MOV arrester iscapable of withstanding temporaryovervoltages, so that ratings can bereduced, providing improved marginsof protection.

Because it is fully shielded and dead-front, it is mountable at any angleand submersible. Its durable rubberconstruction means there are no

fragile porcelain skirts to chip or crack.The MOV arrester is available inratings from 3 kV to 27 kV.

Figure 17.0-3. Four-Position Switch(Loop-Feed) “V Blade”

A

ource oil

A- oi Open

A

Source

B Source

AB-Coil A-Coil

B-Coil Open and Loop through

Coil

A

B Source

AB-Coil A-Coil

B-Coil Open

Coil

Source


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Figure 17.0-4. 200A, 15 kV Class Loadbreak Elbow Connector

Figure 17.0-5. Bushing Well Insert Cutaway Illustrates Uncomplicated Nature of Current Path

1 7 . 7 8

- 2 3. 1 1 M M

LE215

B

1 0 0 -.91 0

I N

INSULATIONHigh-quality peroxide-cured EPDM rubber formulated, mixedand milled in-house for consistent and reliable field performance.

SEMI-CONDUCTIVE INSERTHigh-quality peroxide-cured EPDM rubbercreates a smooth surface around the “currentinterchange” to evenly distribute electricalstress within the insulation.

PULLING EYEStainless steelreinforced forpositive shotgunstick switchingoperations.

TEST POINT (OPTIONAL)Corrosion-resistant, conductiveelectrode provides consistentcapacitive voltage for application of fault indicators and for determiningif the circuit is energized (cap notshown).

LOADBREAK BANDUV-resistant nylon band identifiesthe elbow as three-phase loadbreakrated and is field replaceable.

CONDUCTIVE INSERT ENDSEncapsulated with insulating rubber. Reducescable extrusion and distortion that can becaused by thermocycling. Mitigates the effects of the electrical stresses along the cable to elbowinterface, greatly reducing the possibility ofinterface tracking.

LOADBREAK PROBETin-plated copper probe with arc-ablativetip(arc follower) provides dependable load-break switching characteristics.

COPPERTOP COMPRESSION CONNECTORInertia-welded aluminum barrel and threaded copperlug makes crimping easy and ensures a tight, reliableelectrical connection with loadbreak probe.

GROUNDING TABSMolded into semi-conductive shieldfor the attachment of a ground wireto maintain deadfront safety.

SEMI-CONDUCTIVE SHIELDHigh-quality peroxide-cured EPDM rubber provides protectivedeadfront shield that meets requirements of IEEE Standard 592.

INSULATIONHigh-quality, peroxide-cured EPDMrubber formulated, mixed and moldedin-house for consistent and reliable

field performance.SHIELD HOUSINGStructural member of insertproviding mechanical strengthand uniform electrical shielding.

LATCH INDICATOR RINGMolded-in bright yellow ring eliminates elbow installationguesswork by ensuring a quality connection.

ARC SNUFFER ASSEMBLYArc-ablative plastic produces

arc-extinguishing gasduring loadbreak switchingoperations.

GROUNDING TABSThree tabs molded into a semi-conductiveshield for the attachment of a ground wireto maintain deadfront safety.

HEX BROACH5/16” hex broach

permits consis-tent installationwith torque tool.

THREADED BASE3/8”-16 UNCCopper threadsprovide connectionto bushing wellstud.

CONTACT HOLDERCopper component transfers current frompiston-contact to bushing well stud.

SEMI-CONDUCTIVE SHIELDHigh quality EPDM rubber provides protective deadfrontshield that meets requirements of IEEE Standard 592.

INTEGRAL PISTON-CONTACT

One-piece copper componentprovides a multi-point, knurledcurrent transfer to the contactholder. During a “fault-close”switching operation, the pistonis forced quickly forward toengage the elbow’sloadbreak probe.


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Figure 17.0-6. Bay-O-Net Assembly with Isolation Link

Note: Isolation link is not required if the Bay-O-Net fuse is used in series with a backup energy limiting fuse.

Figure 17.0-7. Insertion of Bay-O-Net Into Cartridge

Figure 17.0-8. Assembly of Cartridge with Fuse Onto Inner Holder

TankWall

Recommended Oil Level

Minimum Oil Level

ElbowConnector

UndergroundCable

IsolationLink

UpperContactBottom

ContactHighVoltageLead

TransformerPrimaryWinding

High VoltageBushing

1.25(29.0)

ContactFlare End

Bay-O-NetFuse Link

Tulip Tip EndCartridge

Flare End of Bay-O-Net Link

Cartridge(a)

Tulip End of Bay-O-Net Link

Inner Holder(b)

End Plug(c)


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Layout Dimensions011

Figure 17.0-9. Pad-Mounted Transformer (75–2500 kVA)—Dimensions in Inches (mm)

Table 17.0-9. Standard Unit, Oil-Immersed 65°C Rise, 75–2500 kVA—Dimensions in Inches (mm)

kVA Transformer Dimensions ApproximateWeight Lbs (kg)

Gallons (Liters) ofOil (Approximate)Width (W) Depth (D) Height (H)

HV: 5–15 kV Radial Feed, Livefront

75

112 150

56.00 (1422.4)

56.00 (1422.4) 56.00 (1422.4)

50.00 (1270.0)

50.00 (1270.0)50.00 (1270.0)

56.00 (1422.4)

56.00 (1422.4)56.00 (1422.4)

2280 (1034.2)

2400 (1088.6) 2700 (1224.7)

115 (435.3)

115 (435.3)125 (473.2)

225 300 500

56.00 (1422.4) 60.00 (1524.0) 66.00 (1676.4)

54.00 (1371.6)58.00 (1473.2)62.00 (1574.8)

58.00 (1473.2)58.00 (1473.2)60.00 (1524.0)

3350 (1519.5) 3650 (1655.6) 5200 (2358.7)

150 (567.8)165 (624.6)200 (757.1)

75010001500

81.00 (2057.4) 84.00 (2133.6) 86.00 (2184.4)

64.00 (1625.6)66.00 (1676.4)72.00 (1828.8)

68.00 (1727.2)68.00 (1727.2)68.00 (1727.2)

7200 (3265.9) 9000 (4082.3)10,250 (4649.3)

360 (1362.7)400 (1514.2)440 (1665.6)

200025003000

92.00 (2336.8) 98.00 (2489.2)102.00 (2590.8)

80.00 (2032.0)82.00 (2082.8)83.00 (2108.2)

72.00 (1828.8)72.00 (1828.8)77.00 (1955.8)

13,400 (6078.1)15,000 (6803.9)16,500 (7484.3)

550 (2082.0)570 (2157.7)625 (2365.9)

HV: 5–15 kV Radial Feed, Deadfront

75 112 150

62.00 (1574.8) 62.00 (1574.8) 62.00 (1574.8)

50.00 (1270.0)50.00 (1270.0)50.00 (1270.0)

56.00 (1422.4)56.00 (1422.4)56.00 (1422.4)

2350 (1065.9) 2450 (1111.3) 2700 (1224.7)

115 (435.3)115 (435.3)125 (473.2)

225 300

500

62.00 (1574.8) 62.00 (1574.8)

66.00 (1676.4)

54.00 (1371.6)58.00 (1473.2)

62.00 (1574.8)

58.00 (1473.2)58.00 (1473.2)

60.00 (1524.0)

3400 (1542.2) 3700 (1678.3)

5400 (2449.4)

150 (567.8)165 (624.6)

200 (757.1) 75010001500

81.00 (2057.4) 84.00 (2133.6) 86.00 (2184.4)

64.00 (1625.6)66.00 (1676.4)72.00 (1828.8)

68.00 (1727.2)68.00 (1727.2)68.00 (1727.2)

7200 (3265.9) 9000 (4082.3)10,250 (4649.3)

360 (1362.7)400 (1514.2)440 (1665.6)

200025003000

92.00 (2336.8) 98.00 (2489.2)102.00 (2590.8)

80.00 (2032.0)82.00 (2082.8)83.00 (2108.2)

72.00 (1828.8)72.00 (1828.8)77.00 (1955.8)

13,400 (6078.1)15,000 (6803.9)16,500 (7484.3)

550 (2082.0)570 (2157.7)625 (2365.9)

HV: 5–15 kV Loop Feed, Livefront

75 112 150

65.00 (1651.0) 65.00 (1651.0) 65.00 (1651.0)

50.00 (1270.0)50.00 (1270.0)50.00 (1270.0)

56.00 (1422.4)56.00 (1422.4)56.00 (1422.4)

2400 (1088.6) 2500 (1134.0) 2800 (1270.1)

115 (435.3)115 (435.3)125 (473.2)

225 300 500

65.00 (1651.0) 66.00 (1676.4) 68.00 (1727.2)

54.00 (1371.6)58.00 (1473.2)62.00 (1574.8)

58.00 (1473.2)58.00 (1473.2)60.00 (1524.0)

3500 (1587.6) 3800 (1723.7) 5600 (2540.1)

150 (567.8)165 (624.6)200 (757.1)

75010001500

82.00 (2082.8) 86.00 (2184.4) 88.00 (2235.2)

64.00 (1625.6)66.00 (1676.4)72.00 (1828.8)

68.00 (1727.2)68.00 (1727.2)68.00 (1727.2)

7200 (3265.9) 9000 (4082.3)10,250 (4649.3)

360 (1362.7)400 (1514.2)440 (1665.6)

200025003000

92.00 (2336.8) 98.00 (2489.2)102.00 (2590.8)

80.00 (2032.0)82.00 (2082.8)83.00 (2108.2)

72.00 (1828.8)72.00 (1828.8)77.00 (1955.8)

13,400 (6078.1)15,000 (6803.9)16,500 (7484.3)

550 (2082.0)570 (2157.7)625 (2365.9)

HVComp

LVComp

H

.50(88.9)Min.

ConductorEntry Area

4.00 (101.6)

Front View Side View Pad

DW

15.50(393.7)

D + 4.00 (101.6)

42.00 (1066.8)

W + 4.00 (101.6)

Dimensional Variations

Height Variations

1. Add 3.00 inches (76.2 mm) to theheight when using bayonet fusingon all kVA ratings.

2. Add 7.00 inches (177.8 mm) to theheight when using dry well canisterfusing on 75–500 kVA ratings.

3. Add 8.00 inches (203.2 mm) to theheight when using dry well canisterfusing on 750 kVA rating only.

Depth Variations

4. Canister fuses require deepertanks on some transformer sizes.

a. Add 4.00 inches (101.6 mm) tothe depth of kVA ratings 75, 150and 225.

b. Add 2.00 inches (50.8 mm) to

the depth of kVA rating 500.

5. Less flammable natural estherfluid requires deeper tanks onsome transformer ratings.

a. Add 2.00 inches (50.8 mm)to the depth of kVA ratings75–1500. Add 8.00 inches(203.2 mm) to the depth of kVA ratings 2000 and 2500.

Dimensions are approximate—not for construction.


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Layout Dimensions/Technical Data012

Table 17.0-9. Standard Unit, Oil-Immersed 65°C Rise, 75–2500 kVA—Dimensions in Inches (mm) (Continued)

Technical Data

Table 17.0-10. Liquid Filled


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Layout Dimensions013

Figure 17.0-10. Pad-Mounted Transformer (3000–5000 kVA)—Dimensions in Inches (mm)

Table 17.0-14. Standard Unit, Oil-Immersed Rated 65°C Rise, 3000–5000 kVA—Dimensions in Inches (mm)

Standard compartment depth is 22.00 inches (558.8 mm) except 200 kV BIL has a depth of 30.00 inches (762.0 mm).Depth may be altered by the addition of switching and fusing.

Extends under base of transformer only. Does not include rear coolers. Standard low voltages are 480Y and 480 delta (through 3750 kVA only).

Low voltage above 3750 kVA must be 2400V or above.

kVA Transformer Pad ApproximateWeight Lbs (kg)

Gallons(Liters) of OilA B C D E F

15 kV Class, Delta Connected HV-HV 95 kV BIL, LV 30 kV BIL

300037505000

76.00 (1930.4) 80.00 (2032.0) 78.00 (1981.2)

119.00 (3022.6) 82.00 (2082.8)137.00 (3479.8)

100.00 (2540.0)111.00 (2819.4)108.00 (2743.2)

74.00 (1879.6) 79.00 (2006.6) 76.00 (1930.4)

72.00 (1828.8)83.00 (2108.2)80.00 (2032.0)

58.00 (1473.2)63.00 (1600.2)60.00 (1524.0)

12,900 (5851)20,000 (9072)21,500 (9752)

385 (1457)540 (2044)565 (2139)

15 kV Class, Wye Connected HV-HV 95 kV BIL, LV 30 kV BIL

300037505000

74.00 (1879.6) 97.00 (2463.8) 91.00 (2311.4)

117.00 (2971.8) 81.00 (2057.4)119.00 (3022.6)

102.00 (2590.8)101.00 (2565.4)108.00 (2743.2)

78.00 (1981.2) 81.00 (2057.4) 84.00 (2133.6)

74.00 (1879.6)77.00 (1955.8)80.00 (2032.0)

62.00 (1574.8)65.00 (1651.0)68.00 (1727.2)

15,000 (6804)21,800 (9888)22,000 (9979)

390 (1476)550 (2082)585 (2214)


300037505000

83.00 (2108.2) 96.00 (2438.4)101.00 (2565.4)

84.00 (2133.6) 84.00 (2133.6)101.00 (2565.4)

101.00 (2565.4) 98.00 (2489.2)107.00 (2717.8)

86.00 (2184.4) 86.00 (2184.4) 84.00 (2133.6)

74.00 (1879.6)78.00 (1981.2)79.00 (2006.6)

70.00 (1778.0)70.00 (1778.0)68.00 (1727.2)

15,400 (6985)20,100 (9117)22,900 (10,387)

515 (1949)650 (2461)670 (2536)


300037505000

84.00 (2133.6) 93.00 (2362.2) 90.00 (2286.0

80.00 (2032.0) 85.00 (2159.0)110.00 (2794.0)

102.00 (2590.8) 99.00 (2514.6)108.00 (2743.2)

80.00 (2032.0) 84.00 (2133.6) 84.00 (2133.6)

74.00 (1879.6)78.00 (1981.2)80.00 (2032.0)

64.00 (1625.6)68.00 (1727.2)68.00 (1727.2)

16,300 (7394)21,200 (9616)23,100 (10,478)

450 (1703)575 (2177)605 (2290)


300037505000

86.00 (2184.4) 86.00 (2184.4)102.00 (2590.8)

86.00 (2184.4) 82.00 (2082.8)122.00 (3098.8)

101.00 (2565.4)102.00 (2590.8)106.00 (2692.4)

78.00 (1981.2) 82.00 (2082.8) 83.00 (2108.2)

73.00 (1854.2)76.00 (1930.4)78.00 (1981.2)

62.00 (1574.8)66.00 (1676.4)67.00 (1701.8)

15,700 (7121)19,800 (8981)22,600 (10,251)

420 (1590)525 (1987)580 (2196)


300037505000

82.00 (2082.8) 91.00 (2311.4) 92.00 (2336.8)

86.00 (2184.4) 82.00 (2082.8)122.00 (3098.8)

101.00 (2565.4)102.00 (2590.8)106.00 (2692.4)

78.00 (1981.2) 82.00 (2082.8) 83.00 (2108.2)

73.00 (1854.2)76.00 (1930.4)78.00 (1981.2)

62.00 (1574.8)66.00 (1676.4)67.00 (1701.8)

15,700 (7121)19,800 (8981)22,600 (10,251)

420 (1590)525 (1987)580 (2196)


300037505000

84.00 (2133.6) 84.00 (2133.6) 92.00 (2336.8)

84.00 (2133.6) 84.00 (2133.6)122.00 (3098.8)

100.00 (2540.0)101.00 (2565.4)106.00 (2692.4)

86.00 (2184.4) 86.00 (2184.4) 81.00 (2057.4)

74.00 (1879.6)77.00 (1955.8)78.00 (1981.2)

70.00 (1778.0)70.00 (1778.0)65.00 (1651.0)

15,400 (6985)19,300 (8754)20,500 (9299)

530 (2006)630 (2385)600 (2271)


300037505000

80.00 (2032.0) 86.00 (2184.4) 95.00 (2413.0)

84.00 (2133.6) 87.00 (2209.8)105.00 (2667.0)

104.00 (2641.6)107.00 (2717.8)107.00 (2717.8)

86.00 (2184.4) 86.00 (2184.4) 85.00 (2159.0)

76.00 (1930.4)79.00 (2006.6)79.00 (2006.6)

70.00 (1778.0)70.00 (1778.0)69.00 (1752.6)

17,100 (7756)20,600 (9344)23,800 (10,795)

500 (1893)560 (2120)625 (2366)


300037505000

88.00 (2235.2) 90.00 (2286.0)101.00 (2565.4)

104.00 (2641.6)104.00 (2641.6)102.00 (2590.8)

99.00 (2514.6)104.00 (2641.6)106.00 (2692.4)

107.00 (2717.8)107.00 (2717.8)107.00 (2717.8)

83.00 (2108.2)90.00 (2286.0)90.00 (2286.0)

91.00 (2311.4)91.00 (2311.4)89.00 (2260.6)

19,800 (8981)24,400 (11,068)28,600 (12,973)

720 (2725)840 (3180)920 (3483)

Dimensions are approximate—not for construction.

B

1 H X 1 X

X3X2X1X0

H1 H2 H3

E

T

15.00(381.0)

8.00203.2)

.(203.2)

Front View Side View

Pad


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Technical Data014

Liquid Filled Technical DataTable 17.0-15. Liquid Filled 15 kV Primary 55°C Temp. Rise

Table 17.0-16. Liquid Filled 5 kV Primary 55°C Temp. Rise







Note: Losses offered are typical only, not guaranteed. Losses basedon aluminum windings. Losses based on LV rating 0.48 kV.

kVA No Loadat 75°CRef. Temp.(Watts)

Load Lossat 100%Load and75°C Ref.

Temp.(Watts)

Total Lossesat 100%Load and85°C

(Watts)

95 kV HV BILTotal Losses at50% Load and55°C LL Ref. Temp.

and 20°C NL Ref.Temp. per DOE(Watts)

300037505000

551765218193

22,49126,34032,255

28,00832,86140,448

11,14013,11016,260


Load Lossat 100%Load and75°C Ref.Temp.(Watts)

Total Lossesat 100%Load and85°C(Watts)

60 kV HV BIL Total Losses at50% load and55°C LL Ref. Temp.and 20°C NL Ref.Temp. per DOE(Watts)

30003750

5000

54616455

8111

22,26926,076

31,932

27,73032,531

40,043

11,03012,230

16,090




150 kV HV BILTotal Losses at50% Load and55°C LL Ref. Temp.and 20°C NL Ref.Temp. per DOE(Watts)

300037505000

557065848273

22,04625,81531,612

27,61632,39939,885

11,08013,04016,180

kVA No Load

at 75°CRef. Temp.(Watts)

Load Loss

at 100%Load and75°C Ref.Temp.(Watts)

Total Losses

at 100% LOADand 85°C(Watts)

200 kV HV BIL

Total Losses at50% Load and55°C LL Ref. Temp.and 20°C NL Ref.Temp. per DOE(Watts)

300037505000

584869138686

21,82525,55631,295

27,67332,46939,981

11,30013,30016,510

kVA No Loadat 85°CRef. Temp(Watts)

Load Lossat 100%Load and85°C Ref.

Temp.(Watts)

Total Lossesat 100%Load and85°C

(Watts)

95 kV HV BILTotal Losses at50% Load and55°C LL Ref. Temp.

and 20°C NL Ref.Temp. per DOE(Watts)

300037505000

598570758889

24,40228,57834,996

30,38735,65343,885

12,09014,22017,640





30003750

5000

59257003

8800

24,16128,292

34,646

30,08635,295

43,446

11,97014,080

17,460





300037505000

604371438976

23,91928,00934,299

29,96235,15243,275

12,02014,15017,550

kVA No Load

at 85°CRef. Temp.(Watts)

Load Loss

at 100%Load and85°C Ref.Temp.(Watts)

Total Losses

at 100%Load and85°C(Watts)

200 kV HV BIL

Total Losses at50% Load and55°C LL Ref. Temp.and 20°C NL Ref.Temp. per DOE(Watts)

300037505000

634575009424

23,68027,72833,955

30,02535,22843,379

12,27014,43017,910

Documents

transformador pad mounted