transformador pad mounted
TRANSCRIPT
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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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CA08104001E
September 2011
Pad-Mounted Transformers
Sheet 17
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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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September 2011
Pad-Mounted Transformers
Sheet 17
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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CA08104001E
September 2011
Pad-Mounted Transformers
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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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Pad-Mounted Transformers
Sheet 17
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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Pad-Mounted Transformers
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General Description006
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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September 2011
Pad-Mounted Transformers
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General Description008
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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Pad-Mounted Transformers
Sheet 17
General Description009
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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Pad-Mounted Transformers
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General Description010
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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17.0September 2011
Pad-Mounted Transformers
Sheet 17
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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8/9/2019 transformador pad mounted
12/14
7.0-12
For more information, visit: www.eaton.com/consultants CA08104001E
September 2011
Pad-Mounted Transformers
Sheet 17
i
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
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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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13/14
CA08104001E For more information, visit: www.eaton.com/consultants
17.0September 2011
Pad-Mounted Transformers
Sheet 17
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)
25 kV Class, Delta Connected HV-HV 150 kV BIL, LV 30 kV BIL
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)
25 kV Class, Wye Connected HV-HV 125 kV BIL, LV 30 kV BIL
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)
35 kV Class, Delta Connected HV-HV 200 kV BIL, LV 30 kV BIL
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)
35 kV Class, Wye Connected HV-HV 125 kV BIL, LV 30 kV BIL
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)
35 kV Class, Delta Connected HV-HV 150 kV BIL, LV 30 kV BIL
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)
35 kV Class, Wye Connected HV-HV 150 kV BIL, LV 30 kV BIL
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)
35 kV Class, Wye Connected HV-HV 200 kV BIL, LV 30 kV BIL
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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8/9/2019 transformador pad mounted
14/14
7.0-14
For more information, visit: www.eaton.com/consultants CA08104001E
September 2011
Pad-Mounted Transformers
Sheet 17
i
2
3
4
5
6
7
8
9
0
1
2
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4
5
6
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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
Table 17.0-17. Liquid Filled 25 kV Primary 55°C Temp. Rise
Table 17.0-18. Liquid Filled 35 kV Primary 55°C Temp. Rise
Table 17.0-19. Liquid Filled 15 kV Primary 65°C Temp. Rise
Table 17.0-20. Liquid Filled 5 kV Primary 65°C Temp. Rise
Table 17.0-21. Liquid Filled 25 kV Primary 65°C Temp. Rise
Table 17.0-22. Liquid Filled 35 kV Primary 65°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
kVA No Loadat 75°CRef. Temp.(Watts)
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
kVA No Loadat 75°CRef. Temp.(Watts)
Load Lossat 100%Load and75°C Ref.Temp.(Watts)
Total Lossesat 100%Load and85°C(Watts)
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
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)
30003750
5000
59257003
8800
24,16128,292
34,646
30,08635,295
43,446
11,97014,080
17,460
kVA No Loadat 85°CRef. Temp.(Watts)
Load Lossat 100%Load and85°C Ref.Temp.(Watts)
Total Lossesat 100%Load and85°C(Watts)
150 kV HV BILTotal Losses at50% Load and55°C LL Ref. Temp.and 20°C NL Ref.Temp. per DOE(Watts)
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