POWER-ZONE Load Center Unit Substationsstevenengineering.com/Tech_Support/PDFs/45PNBPZL.pdf · PZ III Low V oltage Drawout Switchgear . . . . . . . . . . . . . . . . . . 8 ... voltage

POWER-ZONE®

Load Center Unit Substations

Class 6020

I

General Layout Information . . . . . . . . . . . . . . . . . . . . . . . . . .1

General InformationGeneral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Standard Product Information . . . . . . . . . . . . . . . . . . . . . . . . . .4

Major Component General InformationHVL Metal-Enclosed Load Interrupter Switchgear . . . . . . . . .5VISI-VAC Metal-Enclosed Circuit Interrupter Switchgear . . .6Metal-Clad Switchgear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7PZ III Low Voltage Drawout Switchgear . . . . . . . . . . . . . . . . . .8POWER-STYLE QED Switchboard Incoming Primary

Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9POWER-STYLE QED Switchboard Secondary Main

Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9POWER-STYLE QED Switchboard Distribution Sections . .10POWER-DRY VPI Dry-Type Transformer . . . . . . . . . . . . . . . .12POWER-CAST Cast-Coil Transformer . . . . . . . . . . . . . . . . . .13UNI-CAST (Cast-Coil Primary/VPI Secondary)

Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Liquid-Filled Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15MODEL 5/6 Motor Control Center . . . . . . . . . . . . . . . . . . . . .16Busway Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Special Applications and ProductsPOWER-ZONE Type 36 Compact Section

Unit Substation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18Model III POWER-ZONE Package Unit Substation . . . . . . .19

Typical Key Interlock Schemes . . . . . . . . . . . . . . . . . . . . . .20

5 and 15 kV Primary Switchgear Layout InformationHVL/VISI-VAC – POWER-DRY Transformer . . . . . . . . . . . . .29HVL/VISI-VAC – POWER-CAST and

UNI-CAST Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . .30HVL/VISI-VAC – Liquid-Filled Transformers . . . . . . . . . . . . .31Metal-Clad Switchgear – POWER-DRY, POWER-CAST,

and UNI-CAST Transformers . . . . . . . . . . . . . . . . . . . . . . . .32Metal-Clad Switchgear – Liquid-Filled Transformers . . . . . .33

25 kV Primary Switchgear Layout InformationHVL– POWER-DRY and POWER-CAST Transformers . . . .34HVL – Liquid-Filled Transformers . . . . . . . . . . . . . . . . . . . . . .35

34 kV Primary Switchgear Layout InformationHVL – POWER-CAST Transformer . . . . . . . . . . . . . . . . . . . . .36HVL – Liquid-Filled Transformer . . . . . . . . . . . . . . . . . . . . . . .37

600 V Primary Switchboard Layout InformationQED Switchboard – POWER-DRY Transformer . . . . . . . . . .38

Transformer Layout InformationPOWER-DRY Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . .39UNI-CAST Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43POWER-CAST Transformer . . . . . . . . . . . . . . . . . . . . . . . . . .45Liquid-Filled Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

5 kV Secondary Switchgear Layout InformationPOWER-DRY Transformer – HVL/VISI-VAC . . . . . . . . . . . . .52POWER-CAST Transformer – HVL/VISI-VAC . . . . . . . . . . . .53Liquid-Filled Transformer – HVL/VISI-VAC . . . . . . . . . . . . . .54POWER-DRY and POWER-CAST Transformers –

Metal-Clad Switchgear . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55Liquid-Filled Transformer – Metal-Clad Switchgear . . . . . . .56

600 V Secondary Switchboard Layout InformationPOWER-DRY, POWER-CAST and UNI-CAST Transformers –

QED Switchboard to 4000 A . . . . . . . . . . . . . . . . . . . . . . . . .57POWER-DRY, POWER-CAST and UNI-CAST Transformers –

QED Switchboard 4001 – 5000 A . . . . . . . . . . . . . . . . . . . .58Liquid-Filled Transformers – QED Switchboard to

4000 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59Liquid-Filled Transformers – QED Switchboard

4001 – 5000 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

600 V Secondary Draw-Out Switchgear LayoutInformation

POWER-DRY, POWER-CAST and UNI-CAST Transformers – PZ III Switchgear . . . . . . . . . . . . . . . . . . . . .61

Liquid-Filled Transformers – PZ III Switchgear . . . . . . . . . . .62

Table of Contents

1

General Layout Information

Please read this page before attempting to use the inter-face drawings in this catalog! As with any engineeredproduct, substation standards do change from time to time.The substation layout standards shown on the following pagesare the latest that have been produced by the Square DCompany, and are current as of the date of publication. Whenin doubt about any standard shown, please contact your localfield sales office. Please note that the dimensions shown hereare not for construction.

The interface drawings begin on Page 29.

All interfaces are shown with the primary or secondary equip-ment covered by that particular layout in solid lines, and thetransformer is shown in dotted lines. Please note dimensionsnoted as “min” or “minimum”, which denote the minimum pos-sible dimension of a piece of equipment and requires furtherclarification on a case-by-case basis either from the trans-former tables in this catalog or individual equipment dimen-sional information in another catalog. Also, reference pointsmarked as “CL” (short for “centerline”), can either represent thecenterline of the actual electrical connection between thetransformer and the piece of equipment under consideration(as is often the case in indoor units) or can represent the center-line of the hole pattern for the bolts which will hold the twopieces of equipment together (as is often the case withoutdoor units). In either case, for the purposes of this catalogthese serve only as convenient points of reference. Primaryinterfaces are drawn with the primary equipment on the left,and secondary interfaces are drawn with the secondary equip-ment on the right.

The layout standards in this catalog are covered in this order:primary interfaces are shown first, transformer dimensionalinformation is shown next, and secondary interfaces are shownlast. It is therefore recommended that the following procedurebe used for a layout:

1. Knowing the primary equipment type, its voltage class(either 600 V, 5 kV, 15 kV, 24 kV or 34 kV) and the transformertype, find the appropriate primary equipment-to-trans-former interface, noting the overlap, if any, between the frontof the primary equipment and the front of the transformer.Please read all of the footnotes! They provide valuableinformation and are necessary because in manyinstances a substantial amount of information is incor-porated into one interface drawing.

2. Find the transformer dimensional information for the trans-former in question. Please be sure that the dimensionsshown can be applied. The footnotes give a substantialamount of information about situations in which the dimen-sions shown do not apply. When in doubt, please contactyour local field sales office about transformer dimensions.

3. The offset, if any, between the rear of the transformer andthe rear of the primary equipment can now be determined.

4. Knowing the secondary equipment type and its voltageclass (5 kV or 600 V), find the transformer-to-secondaryinterface for the secondary equipment in question. For QEDswitchboards and POWER-ZONE III Low-Voltageswitchgear, please note whether the secondary full-loadcurrent is above or below 4000 A. The overlap, if any,between the transformer front and the secondary equip-ment front can now be determined, as well as any rearoverlap. Please note that because of the complex nature ofQED switchboards and POWER-ZONE III low-voltageswitchgear, these types of equipment should be laid outusing the appropriate layout manual or Quote-to-Cashproduct selector prior to substation layout. Please contactyour local field sales office for details on this process.

5. The substation layout is now complete. Facing the front ofthe substation, the primary equipment is on the left, and thesecondary equipment is on the right. If the opposite orien-tation is desired, the layout may be mirror-imaged with noloss of accuracy.

2

General Information

Secondary Unit Substation

• kVA ratings: 225-5000 kVA (higher ratings available)• Receives power up to 34,500 volts• Transforms to secondary voltages of 1000 volts and below• Distributes lower voltages to load areas• Indoor or outdoor construction

Primary Unit Substation

• kVA ratings: 225-5000 kVA (higher ratings available)• Receives power up to 34,500 volts• Transforms to secondary voltages from 2400 volts to 5000

volts• Indoor or outdoor construction

3

General Information

GeneralThe unit substation is a vital piece of equipment to be consid-ered when planning industrial, commercial, and institutionalelectrical system demands. Square D Company can provide aunit substation to receive up to 34,500 volts, transform this toa lower utilization voltage, and control its distribution to nearbyload areas. Square D Company is a single source supplier ofboth primary and secondary unit substations.

Square D considers the unit substation as a single product thatis designed, coordinated, assembled, and tested at differentmanufacturing locations as multiple self-enclosed pieces ofequipment intended for connection at the jobsite. Various com-binations of incoming sections, transformer sections, and dis-tribution sections make possible a variety of designs (See unitsubstation selection table on this page).

Both Square D Company’s primary unit substations and sec-ondary unit substations are designed, manufactured, andtested in accordance with ANSI C37.121-1989 and otherapplicable ANSI standards, and the applicable standards ofNEMA, UL, and IEEE.

When designing a unit substation, refer to the typical arrange-ments shown in Section 10 of ANSI C37.121-1989. It is alsoimportant to consider the environmental conditions, systemconditions, installation conditions, and load requirements asoutlined in ANSI C37.121-1989.

A unit substation offers the following operational and econom-ical advantages:

SavingsMedium voltage power is purchased at a lower rate than lowvoltage power can be purchased. Transformation to the utiliza-tion voltage at the load center replaces long, high current lowvoltage feeder circuits with less expensive primary cable in thedistribution system.

Better System PerformancePrimary voltage distribution systems feeding load center trans-formers will minimize system voltage drop and improve voltageregulation. Unit substations also divide the electrical systeminto independent load areas, which isolates each area from therest of the system.

SafetyLive parts of all electrical devices are completely enclosed in agrounded steel enclosure. For separate accessibility, internalsteel barriers isolate the incoming line, transformer, and lowvoltage distribution sections from each other. All equipment isdesigned and built in accordance with the latest NEMA andANSI standards. Some components of the unit substation areUL Listed.

Ease of InstallationThe equipment is divided into factory-coordinated shippingsections for ease of handling at the jobsite. Hardware is pro-vided for the connections. Incoming and outgoing connectionsare accessible for ease of installation.

Ease of ExpansionNew unit substations are easily added to primary voltage dis-tribution systems with little effect on the existing equipment.Additional incoming line or low voltage distribution sectionscan be added to an existing unit substation.

MaintenanceThe equipment consists of components designed for minimummaintenance. Refer to operation and maintenance manuals foreach section.

Seismic CalculationsSeismic calculations are available for most Square D substa-tion equipment to show that when anchored as recommended,they will remain anchored during a seismic event. All seismiccalculations are made per the Uniform Building Code. For QEDSwitchboards, seismic calculations are not available, but QEDSwitchboards have been tested and are seismically qualifiedup to seismic zone 4 when anchored as recommended (seeQED switchboard catalog, class 2742 for details).

Manufacturer’s ResponsibilitiesUnit substations are engineered and manufactured by Square DCompany. A single warranty covers the entire unit substation.Square D Company also has a field services division which isavailable for start-up service along with other services.

Unit Substation Selection Tables

Equipment type SPECRight Catalog ClassaSection

Primary Section

Metal-clad switchgear 16350-1 6055

HVL Metal enclosed load interrupter switch 16361-1 6040

VISI/VAC Metal enclosed vacuum load interrupter switchgear 16361-2 6046

Air terminal chamber 16322-1 See Transformer

QED2 Switchboards 16426-1 2742

Transformer Section

VPI conventional power-dry 16322-1 7420

Power-cast cast resin(Primary and secondary coils) 16322-1 7310

Uni-cast cast resin primary withVPI secondary coils 16322-1 7320

Liquid filled –Oil – Silicon – R-Temp® 16322-1 7240

Busway

I-Line/I-Line II 16466-1 5600

Power-Zone Metal-Enclosed 16466-2 6090

a See specific catalog class for individual equipment accessories.

4

General Information

Unit Substation Selection Tables (continued)Secondary Section

Equipment type SPECRight Catalog ClassaSection

Metal-clad switchgear 16350-1 6055

HVL Metal enclosed load interrupter switchgear 16361-1 6040

VISI/VAC Metal enclosed vacuum loadinterrupter switchgear 16361-2 6046

Air terminal chamber 16322-1 SeeTransformer

QED2, 3, 4 low voltage switchboards 16426-1 2742, 2743,2744

PZIII LVDO switchgear 16350-2 6035

Model 6 motor control center 16482-1 8998

Medium voltage motor control center (8198) 16352-1 8198

a See specific catalog class for individual equipment accessories.

SpecificationsSquare D Company offers specifications for a major portion ofits products on computer disks in a program called SPECRight.Contact your local Square D Company sales office to inquireabout this information. The column titled SPECRight Sectionfound in the table identified as the Unit Substation SelectionTable references the section in SPECRight to pull the specifi-cations for each major component in a unit substation.

Standard Product InformationPaint: ANSI 49

Enclosure Type: Indoor - NEMA Type 1Outdoor , non-walk-in - NEMA Type 3RPower Zone Center (Walk-in House)

Connections: High Voltage Windings - DeltaLow Voltage Windings - Delta or Wye

Common 34.5 kV, 24.9 kV, 13.8 kV, 13.2 kV, 12.47 kV, Primary Voltages: 7.2 kV, 4.8 kV, 4.16 kV, 2.4 kV, 480 V

Common 4.8 kV, 4.16 kV, 4.16Y/2.4 kV, 2.4 kV, Secondary Voltages: 600 V, 480 V, 480Y/277 V, 208Y/120 V

Frequency Rating: 60 Hz

Note: For additional ratings and application data, refer to thecatalog sections referenced in the Unit Substation SelectionTable on Page 1.

Power-Flow Nameplate

Power-Flow Nameplates are available showing electrical flowthrough a one line diagram.

An 11x17 (max. size) power-flow nameplate is a replacementfor mimic bus on which users usually require the use of paint,tape, or plastic strips. The nameplate consists of a white back-ground with a black core for the lettering and one line. If the cus-tomer does require mimic bus, the options are paint or plasticstrips.

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5

Major Components General Information

Metal-Enclosed, Type HVL, Medium VoltageLoad Interrupter Switchgear

General Description• Primary and secondary equipment• UL Listed (if required; restrictions apply)• 2.4 to 38 kV• 600 and 1200 amperes continuous current• Unfused/fused• Current limiting/boric acid fuses• FUSELOGIC blown fuse indication

(can also coordinate with shunt trip option for auto-matic shunt trip)

• Shunt trip

• Indoor and outdoor weatherproof enclosures• Single switch bay incoming section• Duplex arrangement available• Line selector arrangement available• Utility/customer metering bay available• Multiple switch bays for distribution sections• Secondary designed for future additions

For further information, see Square D Catalog Class 6040.

Fusible Interrupter Switch 5 and 15 kV Single Bay Section

NEMA Type 115 kV Indoor Unit

NEMA Type 3R15 kV Outdoor Unit with outer door opened

6


General Description• Primary and secondary equipment• No external arcing — current interruption within vacuum

interrupters• Automatic visible circuit isolation• Long life —2500 full-load interruptions• Shunt-trip mechanism• Shunt-close mechanism• Motor operator standard for remote operation

• Protective relaying capability (phase overcurrent, groundfault, phase fault, phase failure, undervoltage, etc.)

• Requires no more floor space than conventional metal-enclosed air switches

• Retrofit opportunities with existing load interrupterswitchgear

• Secondary designed for future addition• Indoor and outdoor enclosures

See Class 6046 for further information.

Metal-Enclosed VISI/VAC®, Medium Voltage Circuit Interrupter Switchgear

(Shown here with door open) (Door closed)

7


General Description• Primary and secondary equipment• VR Circuit Breakers• 5 and 15 kV • 1200-3000 amperes• 250-1000 MVA interrupting capacity• 60 and 95 kV BIL• Indoor and outdoor enclosures• Removable circuit breaker• Fully compartmentalized construction

• Grounded metal barriers• Automatic shutters• Insulated bus• Mechanical interlocks• Disconnect type voltage transformers-CPT and VTs• Low voltage instrument/ control compartment isolated

from primary voltage area• Protective relaying and metering

See brochure 6055BR9402 for further information.

MASTERCLAD™ Metal-Clad Switchgear

Typical NEMA Type 1 Switchgear Assembly

8


POWER-ZONE® III Low Voltage DrawoutSwitchgear

General Description• Low Voltage ANSI rated switchgear meets ANSI

C37.20.1, ANSI 37.51, NEMA SG-5.• Individually mounted, ANSI rated, low voltage, power DS

(not fusible) and DSL (fusible) circuit breakers. Breakersmeet ANSI C37.13, ANSI C37.16, ANSI C37.50, NEMASG-3.

Available breakers:DS, DSL-206, DS-206H, DS-206E 800 A FrameDS, DSL-416, DS-416H 1600 A FrameDS-420 2000 A FrameDS, DSL-632 3200 A FrameDS, DSL-840 4000 A FrameDS-850 (forced-air cooled) 5000 A Frame

• Microprocessor trip device enables the user to attainoptimum system selectivity and coordination. Digitrip510 standard, POWERLOGIC Digitrip 810D available.

• Breakers are 100% rated, two-step stored energy circuitbreakers

• Use as main or feeder devices• Copper bus systems up to 5000 A• Integral ground fault protection• Key interlocking• Compartmentalized construction per ANSI C37.20.1• Optional circuit breaker lifting device mounted on the

switchgear• Indoor or outdoor construction. Outdoor construction

uses POWER-ZONE center enclosure.• Front and rear accessibility• Rear access required for loadside cable connections• UL Labeled (optional). UL 1558 for structure, UL 1066 for

DS circuit breakers

Optional BreakerLifting Device

QED POWER-STYLE® Switchboards

Incoming Primary Section

General Description• Used as incoming section of 600 volt secondary unit

substation (POWER-DRY transformer only)• Available up to 5000 amperes• Fixed or Drawout construction• Main devices:

Molded case circuit breakers-M, N, and P frames(2500 A max.)Fusible switch - BOLT-LOC (4000 A max.)Stored Energy Electronic trip circuit breakers-SE (4000 Amax.)Masterpact (5000 A max.)

• Ground fault protection and metering available• Indoor or outdoor construction• Front and rear accessibility• Incoming cable terminations available• UL Labeled

QED Secondary Mains

General Description• Used as the secondary main device or six subdivision

mains up to 4000 A • Available up to 5000 amperes• Fixed or Drawout construction• Main devices:

Molded case circuit breakers-M, N, and P frames(2500 A max.)Fusible switch-BOLT-LOC (4000 A max.)Electronic trip circuit breakers-SE (4000 A max.)Masterpact (5000 A max.)

• Ground fault protection and metering available• Indoor or outdoor construction• Top or bottom feed• Front and rear accessibility• UL Labeled

9


10


QED Distribution Section

General Description• Used as distribution sections in conjunction with QED

main devices• Available in:

I-LINE distribution section-group mounted I-LINE circuitbreakersQMB distribution section-group mounted QMB/QMJswitches

• 3000 A maximum vertical bus• 5000 A maximum main bus

• 80% or 100% rated circuit breakers available• Integral Zone Selective Interlocking• Ground Fault protection and metering available• Single or Double row construction• Indoor or outdoor construction for I-LINE panels• Copper or aluminum bus available• Front and rear accessibility• UL Labeled

QMB Distribution Section

I-LINE Distribution Section• 63" panel height for 2000 A vertical bus• 72" panel height for 3000 A vertical bus• 54" maximum single-row breaker mounting space• 117" maximum double-row circuit breaker mounting

space for 2000 A vertical bus• 112.5" maximum double-row circuit breaker mounting

height for 3000 A vertical bus• See QED catalog (class 2742) for circuit breaker mount-

ing restrictions and panel widths

QMB/QMJ Distribution Section• 3000 A maximum vertical bus rating• 72" maximum QMB/QMJ switch mounting space• Switches up to 400 A mount in 36" wide section• Switches 400 A-1200 A mount in 42" wide section

I-LINE Distribution Section

POWER-STYLE Switchboards

QED-3 Distribution Sections

QED-3 Distribution Sections with QED Main

General Description• For use with QED Main Section• Individually mounted feeders to 1200 A• 3000 A maximum vertical bus ratings• 5000 A maximum main bus• 80% or 100% rated circuit breakers• Key interlocking available• Integral zone selective interlocking available• Ground fault protection and metering available• Compartmentalized construction• Each 24" (610 mm) section has four 18" (457 mm) com-

partments for mounting circuit breakers• Indoor or outdoor construction• Copper or aluminum bus available• Rear access required for loadside cable connections• UL Labeled• See QED-3 catalog (class 2743) for circuit breaker

mounting restrictions.

QED-4 Distribution Sections

General Description• For use with QED main section• Individually mounted feeders to 2500 A (SE,NE, and NX

drawout circuit breakers)• 4000 A maximum vertical bus ratings• 5000 A maximum main bus• 100% rated circuit breakers• Integral zone selective interlocking available• Ground fault protection and metering available• Key interlocking available• Compartmentalized construction:

Barriers between the circuit breaker compartment andthe through-busBarriers between the through-bus compartment andthe lug compartment

• Each 24" wide (610 mm) section has four 18" high com-partments for mounting circuit breakers

• Optional circuit breaker lifting device mounted on theswitchboard

• Indoor or outdoor construction• Copper or aluminum bus available• Rear access required for loadside cable connections• UL Labeled• See QED-4 catalog (class 2744)

11


Distribution with Drawout SE Circuit Breakers

12


Dry Type Transformers

General Description

Ratings

Item Standard Optional

kVA Sizes 225-5000 —

Primary Voltage Classes 480 V to 26.4 kV —

Secondary Voltages 208Y/120, 240 Delta 480Y/277, 600Y/347480 Delta, 600 Delta, 2400Y, 2400 Delta 240Y/1394160Y, 4160 Delta

(Note: For specific combinations of kVA sizes with primary and secondary voltages, refer to the Medium Voltage Transformer Specification Guide.)

Basic Impulse Levels 2.4 kV-20 kV BIL —5.0 kV-30 kV BIL 60 kV BIL

15.0 kV-60 kV BIL 95 kV BIL25.0 kV-125 kV BIL —

Winding Temperature Rise 150°C 115°C, 80°C

Impedance 5.75% for 500 kVA and Above Available upon request

Insulation System 220°C —

Sound Level Per NEMA ST20 Standard Lower levels

Conductor Material Aluminum Copper

Forced Air Rating Increases kVA by 33 1/3% —

Taps (2) 2 1/2% above and below —Primary Voltage (2400 V and above)

Accessories• Lightning Arresters (intermediate or station class require

air terminal chamber or must be mounted in switchgearsection)

• Provisions for future forced air (FFA)• Forced air cooling (FA)• Electronic temperature indicators• Air terminal chambers (ATC) on primary or secondary• Strip heaters• Key interlock• Indoor or outdoor enclosure• TENV enclosures• UL Listing

Special Applications• UL Listed K-rated units for non-linear loads• Special ambients or altitudes• Low sound levels• 50 Hz requirements• Electrostatic shielding

Unusual Service Conditions - need to identify and advisefield sales or manufacturing plant

• Damaging fumes or vapors, excessive abrasive or metal-lic dust, steam, salt spray, moisture or dripping water,corrosive atmosphere, or any other special conditions

• Abnormal vibration or shock• Unusual transportation or storage conditions• Unusual space limitations• Unusual operating duty, frequency of operation, poor

wave form, unbalanced voltage, or special insulationrequirements

• Seismic requirements

For additional information see Square D catalog section Class7420/7425.

POWER CAST Transformers – Vacuum CastResin Coils

General DescriptionRatings


kVA Sizes 225-10000 —

Primary Voltage Classes 2.4 kV to 34.5 kV —

Secondary Voltages 208Y/120, 480Y/277,480 Delta, 2.4 Delta —4.16Y, 4.16 Delta4.8 kV Delta

(Note: For specific combinations of kVA sizes with primary and secondary volt-ages, refer to the Medium Voltage Transformer Specification Guide.)

Basic Impulse Levels 2.4 kV-45 kV BIL 60 kV BIL5.0 kV-60 kV BIL 75 kV BIL

15.0 kV-95 kV BIL 110 kV BIL25.0 kV-125 kV BIL 150 kV BIL34.5 kV-150 kV BIL 200 kV BIL

Winding Temperature Rise 80°C 115°C

Impedance 5.75% ± 7.5% depending Available uponon HV, BIL, LV ratings request

Insulation System 150°C 185°C


Conductor Material Copper —

Forced Air Rating:500 - 750 kVA Increases kVA by 33 1/3% —

1000 - 5000 kVA Increases kVA by 50% —

Taps (2) 2 1/2% above and —below Primary Voltage

Optional Accessories• Lightning arresters (available with air terminal chamber

only–otherwise these must be mounted in switchgearsection)

• Provisions for future forced air (FFA)• Forced air cooling (FA)• Electronic temperature indicators (Three Phase)• Air terminal chambers (ATC) on primary or secondary• Key interlocks• Indoor or outdoor enclosure

Special Applications• Special ambients or altitudes• Low sound levels• 50 Hz requirements• Electrostatic shielding






For additional information see Square D catalog section Class7310.

13


UNI-CAST™ Transformers – Primary Coil –Vacuum Cast Resin; Secondary Coil – VPI



kVA Sizes 500-10,000 —

Primary Voltage Classes 2.4 kV to 15 kV —

Secondary Voltages 208Y/120, 480Y/277,480 Delta, 240 Delta —

(Note: For specific combinations of kVA sizes with primary and secondary voltages, refer to the Medium Voltage Transformer Specification Guide.)

Basic Impulse Levels 2.4 kV-45 kV BIL5.0 kV-60 kV BIL Consult Factory

15.0 kV-95 kV BIL

Winding Temperature Rise 100°C 80°C

Impedance 5.75% ±7.5% depending upon Available uponKVA, HV BIL and LV rating request

Insulation System 185°C —


Conductor Material Aluminum Copper

Forced Air Rating Increases kVA by 33 1/3% —

Taps (2) 2 1/2% above and below —Primary Voltage

Optional Accessories• Lightning arresters (available with air terminal chamber

only–otherwise these must be mounted in theswitchgear section)

• Provisions for future forced air (FFA)• Forced air cooling (FA)• Electronic temperature indicators (Single Phase or Three

Phase)• Air terminal chambers (ATC) on primary or secondary• Key interlocks• Indoor or outdoor enclosure

Special Applications• Special ambients or altitudes• Low sound levels• 50 Hz requirements• Electrostatic shielding


• Damaging fumes or vapors, excessive abrasive or metal-lic dust, steam salt spray, moisture or dripping water, cor-rosive atmosphere, or any other special conditions




14


15


Liquid-filled Transformers



kVA Sizes 225-10000 —

Primary Voltage Classes 2.5 kV, 5 kV —15 kV, 25 kV, 34.5 kV —

208Y/120 500-1500 kVA —Secondary Voltages 480Y/277, 480 Delta 500-3750 kVA —

2.4 kV, 4.16 kV, 4.8 kV 225-10000 kVA —

(Note: For specific combinations of kVA sizes with primary and secondary volt-ages, refer to the Medium Voltage Transformer Specification Guide.)

2.5 kV- 45 kV BIL 60 kV BIL5.0 kV- 60 kV BIL 75 kV BILBasic Impulse 15.0 kV- 95 kV BIL 110 kV BILLevels 25.0 kV-125 kV BIL 150 kV BIL

34.5 kV-150 kV BIL 200 kV BIL

Winding Temperature Rise 65°C 55/65°C

Coolant Mineral oil Silicone,RTEmp

Impedance 4.0%-8.0% depending —on kVA and LV ratings

Sound Level Per NEMA TR-1 Standard Lower levels

Conductor Material Aluminum/Copper (Sq D Option) Copper

Forced Air Rating: Increases kVA by 15% 225-2000 kVA —Increases kVA by 25% 2500-10000 kVA —

2-2 1/2% above and below 4-2 1/2% full Taps primary voltage capacity

primary voltage

Standard Features• Deenergized tap changer, padlockable• One inch upper filling plug and filter press connection• One inch drain valve with sampler• Dial type thermometer without alarm contacts• Liquid level gauge without alarm contacts• Pressure/vacuum gauge, with bleeder connection,

without alarm contacts• Provisions for jacking and lifting• Pressure relief valve

Optional Accessories• Alarm contacts for accessory gauges• Sudden pressure relay (with or without seal-in relay)• Key interlock on tap changers• Provisions for mounting grounding resistors• Instrument transformers (low voltage air terminal

chamber required)• Surge arresters (high voltage air terminal chamber

required-otherwise these must be mounted inswitchgear section)

• Provisions for future forced air (FFA)• Forced air cooling (FA)• Air terminal chambers on primary or secondary

Special Applications• Special ambients or altitudes• 50 Hz requirements



• Abnormal vibration or shock• Unusual transportation or storage conditions• Unusual space limitations

For additional information, see Square D catalog section Class7420.

16


Model 5/6 Motor Control Centers

• Can be utilized on substation secondary with QEDswitchboard main section

• For system voltages to 600 V• Horizontal main bus and vertical distribution bus and

wireways standard• 600 A, 800 A, 1200 A, 1600 A, or 2000 A main bus rating• NEMA Type 1, 1 Gasketed• Main lugs 600 A - 2000 A• Main Circuit Breaker 110 A - 2000 A (high interrupting

circuit breakers standard)• Main Fusible Switch 200 A - 2000 A (Class R or L fuses

standard• NEMA wiring Classes 1 and 2, Types A, B, and C

available• Full-Voltage Non-Reversing, Full Voltage Reversing, Two

Speed and Reduced-Voltage Autotransformer combina-tion starter units

• Branch Feeder Circuit Breakers 15 A-1200 A (FA, KA, LA,MA, PA frames)

• Fusible Switch feeder units 30 A -1200 A (class H, R orL fuse clips depending upon current rating)

• Empty mounting units, equipped spaces, distributiontransformers and NQOD and NEHB panelboards available

Model 5 Standard Features• Al Power Bus• Steel Vertical Ground Bus• Any of the structural features from the Model 6 Standard

Features List may be purchased A la Carte

Model 6 Standard Features• Cu Power Bus• Cu Vertical Ground Bus• Vertical Wireway Barrier• Bus Barrier Closing Shutters• White Unit Interiors• MCC Buckets have easy-removal feature

17

Major Components Information

Busway Systems

I-LINE/I-LINE II Busway• I-LINE plug-in available from 225 A-600 A with aluminum

or copper conductors• I-LINE II plug-in and feeder styles available 800 A-4000 A

with aluminum conductors, to 5000 A with copper con-ductors

• Available up to 600 V• 3 and 4-pole full neutral configuration• Sandwich construction to provide superior voltage drop

characteristics• Totally enclosed housing• Compact size• Durable electro-deposition epoxy paint finish• Bus bars insulated using class B rated (130°C vendor

certified) materials• Plated Bus bars• Dielectric testing 7000 Vdc standard• One bolt joints with VISI-TITE® torque-indicating bolts

(clamping force of over 4000 lbs.) for ratings less than2000 A. For ratings higher than 2000 A, two or three boltsare used.

• EZ JOINT PACK® removable single bolt joint packageavailable (with VISI-TITE® torque-indicating bolts)

• I-LINE II uses one set of universal tie channels, speedinginstallation

• I-LINE II includes internal fire barriers• Ratings of 200,000 RMS Symmetrical available for

4000 A and 5000 A feeder busway• Outdoor busway available• Universal fittings for maximum layout flexibility• I-LINE II Busway includes integral (50%) ground bus

100 A Plug-In Busway• Totally enclosed plug-in busway• 100 A full load rating

• 3 phase, 4W 480 V or 3 phase, 3W 600 V• Round, electrical grade aluminum or copper conductors• Optional 50% ground bus• Molded phenolic insulators between bus bars• Short-circuit ratings up to 14,000 A symmetrical• High-pressure spring-type connectors at each joint• Wrap-around type hangers (UL Listed in edgewise

mounting position with 10' hanger spacing) or “C” clamp(UL Listed in flatwise mounting position with buswayhung on 5' centers) hangers available

POWER-ZONE® Metal-Enclosed Busway• Available for indoor or outdoor use• Custom designed and manufactured• Available in the following configurations

Voltage Class Continuous Current Momentary KA ASYM

600 V 1200-4000 A 75, 100, 125

5 and 15 kv 1200-5000 A 40

• Designed according to ANSI C37.23• Can be supplied with full round edge plated copper or

plated aluminum bus bars• Insulation for the 5 kV-38 kV bus is fluidized bed epoxy

rated at 130°C. 600 V bus bars are not jacketed• 5 and 15 kV shipping split bus joints are insulated with

removable boots• Bus Supports for 600 V systems are fiberglass. 5 and

15 kV supports are molded using a UL Listed glass rein-forced polyester. 38 kV supports are porcelain.

• Aluminum housing is standard• Painted or stainles steel available as optional• Strip heaters are provided on outdoor construction• Structural supports are available

18

Special Applications and Products

Type 36 Compact Sectional Unit Substation

General DescriptionCompact sectional load center unit substations permit easyhandling through existing doors and hallways. They can beinstalled in locations where physical space limitations will notpermit the installation of a conventional load center unit sub-station. Besides having less depth, the compact designrequires front access only. The transformer’s rectangular barrelwound core and coil and enclosure design requires no ventila-tion from the rear (ventilated rear panels are provided).

• Depth of unit substation 36" (Max.)• Indoor enclosure ONLY• ANSI 49 paint• Requires front access only

Incoming Primary Load Interrupter Switchgear - HVL• UL Listed (If Required)• 600 A Switch• Blown Fuse Indication• Cable connection to transformer• Keylock optional• Unfused or Current-Limiting Fuses Only• Shunt Trip• Two cables per phase maximum• Distribution class surge arresters (optional)• No instrument transformers or metering• 12" top pullbox required (top or bottom entry)

VPI Power-Dry Transformer RatingsItem Standard Optional

kVA Sizes 225-750 —

Primary Voltage Classes 600 V to 15.0 kV —

Secondary Voltages 208Y/120, 480Y/277, 480 Delta, 600 V Delta -10 kV BIL

Basic Impulse Levels 5.0 kV-30 kV BIL —15.0 kV-60 kV BIL —

Winding Temperature Rise 150°C 115°C (to 750 kVA)80°C (to 500 kVA)

UL Listed — 225 kVA-750 kVA(750 kVA at 150°C rise only)

Secondary Main and Distribution Sections - QED-2POWER-STYLE Switchboard

Main Section• Fixed mounted main device available up to 2500

amperes • Main devices:

Molded case circuit breakers - M, N, and P framesFusible switch - BOLT-LOCStored-energy electronic trip circuit breakers - SE

• Ground fault protection and metering available• Top or bottom feed• UL Labeled• Keylock optional

Distribution Section• Available in:

I-LINE distribution section - group mounted I-LINEcircuit breakersQMB distribution section - group mounted QMB/QMJswitches

• 80% or 100% rated circuit breakers• Single or double row construction for I-LINE circuit

breakers• Copper or aluminum bus• UL Labeled• Provisions for future extension

19

Special Applications and Products

Model III POWER-ZONE®

Package Unit Substation

General Application DataModel III POWER-ZONE package unit substations incorpo-rate—into one pre-assembled, unitized module—an HVLswitch, dry-type transformer and molded-case circuit breakerdistribution section. All components are manufactured bySquare D. The complete package unit substation is engineeredand tested as one integral unit by Square D.

The Model III is only 36" (914 mm) deep and 85" (2159 mm)high, so it will pass through most existing doorways withoutstructural renovation to the building in which it is installed. Totalweight is less than 8,000 pounds (3629 kg) and the footprintoccupies less than 22 square feet (2.04 m2) of floorspace, for afloor-loading of less than 365 lb./sq. ft. (1782 kg/m2).

The air intake is located at the front bottom; the exhaust is ontop of the transformer section, so the unit can be installedagainst a wall or in a corner without alteration or derating.

Model III POWER-ZONE package unit substations are ideal fornew installations in existing buildings as well as for spot zonedistribution in new construction.

Substations are normally shipped as two units, split betweenthe incoming line section and the transformer/low voltage dis-tribution sections. Upon request, they can be provided in onesection on a common base.

Model III POWER-ZONE package unit substations are avail-able in sizes from 75 kVA through 500 kVA with three phaseprimary voltages of 2400 volts through 13,800 volts. Whenequipped with fan cooling, ratings as high as 667 kVA are avail-able, AA/FA. Secondary voltages of 600 V delta, 480 V delta,480Y/227, 208Y/120 and 240 V delta are available. The trans-

former is built with 220°C insulation. 150°C rise is availablethrough 500 kVA. 115°C and 80°C rise are available up to300 kVA. ANSI 49 or ANSI 61 paint is available.

The secondary circuit breaker distribution section is equippedwith an I-LINE®‚ distribution panelboard which accepts thetime-tested and widely acclaimed plug-on I-LINE family ofmolded case circuit breakers. Branch circuit breakers as smallas 15 A single pole FY or FA frame with 1.5" (38 mm) mountingheight, to as large as 1200 A NA frame 3-pole breakers with 15inches (381 mm) mounting height may be installed. ME/NEframe electronic trip breakers and I-LIMITER®‚ high interruptingcapacity current limiting circuit breakers may also be used. Thissection provides 81" (2057 mm) of circuit breaker mountingheight.

Model III substations allow faster and easier installations. Theircompact design allows a greater choice of installation loca-tions. Package substations provide lower cost systemsthrough:

• Service Continuity — Substations located at each loadarea isolate outages and allow faster trouble-shooting.

• Expansion — Substations divide a system into isolatedsections which are unaffected by the addition of newload areas.

• Efficient Performance — Shorter secondary feederslower power loss and provide better voltage regulation.

• Lower Power Cost — Power is purchased at lowerprimary rates.

• Lower Equipment Costs — High voltage cable is lessexpensive than high-current, low voltage feeder circuits.Smaller, less expensive molded case breakers offset theextra transformer cost.

For additional information including layouts, see Bulletin D1-NClass 6010/02, or contact Square D/Sorgel in Milwaukee.

20

Typical Key Interlock Schemes

IntroductionKey interlocks are an integral part of many unit substations.Square D Company offers completely coordinated key inter-lock systems. For convenience, 14 commonly used key inter-lock schemes are described in the following pages. If one ormore of the key interlock schemes shown is to be included witha Square D unit substation, please mention the method numberwhen the order is placed. Other key interlock schemes areavailable – please contact your local Square D field sales office.

Method 1.Function: To prevent the operation of disconnect switch Awhen breaker B is closed.

To prevent the opening of the fuse compartment door when thedisconnect switch A is closed.

The breaker, fuse compartment door and disconnect switchare shown in closed positions. Key A-1 is held in breaker inter-lock and key A-2 is held in disconnect interlock.

To service the breaker:

1. Open the breaker.2. Turn key A-1 in L-O interlock on breaker to lock breaker

open. Key A-1 is now free.3. Insert key A-1 in L-O-C interlock on disconnecting switch

and turn to unlock. Key A-1 is now held.4. Open disconnect.5. Turn key A-1 in L-O-C interlock on disconnect switch to

lock open. Key A-1 is now free.6. Return key A-1 to breaker interlock and unlock for oper-

ation of the breaker during servicing.

Reverse the sequence to restore service.

To open the fuse compartment door:

1. Proceed from operations 1 through 4 above.2. Turn key A-2 in L-O interlock on the disconnect switch to

lock open. The key A-2 is now free.3. Insert the key A-2 in L-C interlock on the fuse compart-

ment door and turn to unlock. The key A-2 is now held.4. Open the fuse compartment door.


Method 2.

Function: To prevent the operation of disconnect switch Awhen breakers B, C, D and E are closed. (Breakers may beopened in any sequence.)

Disconnect A and breakers B, C, D and E are shown in theclosed position. The key A-1 is held in Transfer interlock. KeysA-2, A-3, A-4, and A-5 are held in the interlocks on Breaker B,C, D, and E.

1. Open breakers B, C, D and E.2. Turn the key in L-O interlock on each Breaker B, C, D and

E to lock the breakers open. The keys A-2, A-3, A-4, A-5are now free.

3. Insert keys A-2, A-3, A-4 and A-5 in the transfer interlock.4. Turn key A-1 in the Transfer interlock. Key A-1 is now free.

(Keys A-2, A-3, A-4 and A-5 are now held.)5. Insert key A-1 in L-O-C interlock on disconnect A and turn

to unlock. Key A-1 is now held.6. Open disconnect A.7. Turn key A-1 in L-O-C interlock on disconnect A to lock

open. Key A-1 is now free.8. Insert key A-1 in Transfer interlock and turn. Key A-1 is

now held. Keys A-2, A-3, A-4 and A-5 are now free.9. Return keys A-2, A-3, A-4 and A-5, as desired, to breaker

interlocks and unlock for operation during servicing.


L-O

A-2

L-C

L-O

A-1

LOC

E

A

E

E

EA 2

A 1

A 2

L-O

A

B

A 1

A 3

L-O

CA 4

L-O

DA 5

L-O

E

A-1

A-5

LOC

W

A-4W

A-3W

A-2W

E

T

21

Method 3.

Function: To prevent the operation of disconnect switch Awhen breakers B, C, D and E are closed.

Note: Breakers must be opened in prearranged sequence.

(Electrical circuit is equivalent of Method 2.)

Disconnect A and Breakers B, C, D and E are shown in theclosed positions. Key A-1 is held in the breaker B interlock. KeyA-2 is held in the breaker C interlock, key A-3 is held in thebreaker D interlock and key A-4 is held in the breaker E inter-lock. Key A-5 is held free in the breaker E interlock or is retainedby the supervisor.

1. Obtain key A-5 from supervisor.2. Open breaker E.3. Insert key A-5 in the L-O interlock on breaker E and turn

Key A-5 to lock open. Key A-5 is now held. Key A-4 isnow free.

4. Open breaker D.5. Insert key A-4 in L-O interlock on breaker D and turn key

A-3 to lock the breaker open. Key A-4 is now held. KeyA-3 is now free.

6. Open breaker C.7. Insert key A-3 in L-O interlock on breaker C and turn key


8. Open breaker B.9. Insert key A-2 in L-O interlock on breaker B and turn key


10. Insert key A-1 in L-O-C interlock on disconnect A andturn to unlock. Key A-1 is now held.

11. Open the disconnect.12. Turn the key A-1 in L-O-C interlock on disconnect A to

lock it open. Key A-1 is now free.13. Insert key A-1 in L-O interlock on breaker B and turn it

to unlock. Key A-1 is now held and key A-2 is free.

14. Breaker A may now be operated for servicing.15. Insert key A-2 in L-O interlock on breaker C and turn it

to unlock. Key A-2 is now held, and key A-3 is free.16. Breaker C may now be operated for servicing.17. Insert key A-3 in L-O interlock on breaker D and turn it

to unlock. Key A-3 is now held and key A-4 is free.18. Breaker D may now be operated for servicing.19. Insert key A-4 in L-O interlock on breaker E and turn it to

unlock. Key A-4 is now held and the supervisor’s key A-5 is free.

20. Breaker E may now be operated for servicing.Reverse the sequence to restore service.

Method 4.Function: To prevent the paralleling of lines A and B.

Single load, fed from either source.

To prevent the operation of disconnect switches A and B whenthe breaker C is closed.

Breaker C and the disconnect A are shown in the closed posi-tion. Disconnect B is shown in the open position. The key A-1is held in the breaker C interlock. The key A-2 is held in the dis-connect A, L-O interlock.

To service the breaker:1. Open breaker C.2. Turn key A-1 in the L-O interlock on the breaker to lock it

open. Key A-1 is now free.3. Insert key A-1 in the L-O-C interlock on disconnect A and

turn it to unlock. Key A-1 is now held.4. Open disconnect switch A.5. Turn key A-1 in the L-O-C interlock on disconnect A to

lock it open. Key A-1 is now free.6. Return key A-1 to the breaker interlock and unlock it for

operation of the breaker during servicing.

To transfer the load from line A to line B:1. Open breaker C.2. Turn key A-1 in the L-O interlock on the breaker to lock

it open. Key A-1 is now free.3. Insert key A-1 in the L-O-C interlock on disconnect A

and turn it to unlock. Key A-1 is now held.4. Open disconnect switch A.


A 2

L-O

A 1

L-O

A-1

LOC

A-1

LOC

A-2

L-O

C

A

A

B

B

A-2

L-O

A

BA-3

L-O

CA-4

L-O

DA-5

L-O

E

A 1 A 2 A 3 A 4

A 5

A-1

LOC

E

W

E

W

E

W

E

W

SupervisoryKey

22


5. Turn key A-1 in the L-O-C interlock and key A-2 in L-Ointerlock on disconnect A to lock open. Keys A-1 and A-2 are now free.

6. Insert key A-1 in the L-O-C interlock on disconnect Band turn it to unlock. Key A-1 is now held.

7. Insert key A-2 in the L-O interlock on disconnect B andturn it to unlock. Key A-2 is now held.

8. Close disconnect switch B.9. Turn key A-1 in the L-O-C interlock on disconnect B to

lock it closed. Key A-1 is now free.10. Insert key A-1 in the breaker interlock and turn it to

unlock. The key A-1 is now held.11. Close the breaker.

Reverse the sequence to restore service through line A.

Method 5.Function: To prevent the paralleling of lines A and B.

Two loads, fed from either source (one tie-breaker).

To prevent the operation of disconnect switch D when breakerA is closed.

To prevent the operation of disconnect switch E when breakerB is closed.

The disconnect switches D and E and breakers A and B areclosed. Breaker A is closed to supply the load M. Breaker B isclosed to supply the load N. Tie-Breaker C is open. Keys A-1and A-2 are held in the interlock on breaker A. Keys A-1 and A-3 are held in the interlock on breaker B. The Tie-Breaker Ccannot be closed until either breaker A or B is locked open.

To transfer load N to breaker A, proceed as follows:1. Open breaker B.2. Turn key A-1 in L-O interlock on breaker B to lock it open.

Keys A-1 and A-3 are now free.3. Insert key A-1 in L-O interlock on tie-breaker C and turn

it to unlock. Key A-1 is now held.4. Close tie-breaker C.

Reverse the sequence to restore service through breaker B.Load M can be supplied through breaker B in a similar manner.

To service Breaker B, proceed as follows:1. Open breaker B.2. Turn key A-1 in the L-O interlock on breaker B to lock it

open. Keys A-1 and A-3 are now free.3. Insert key A-3 in the L-O-C interlock on disconnect E and

turn it to unlock. Key A-3 is now held.4. Open disconnect E.5. Turn key A-3 in the L-O-C interlock on disconnect E to

lock it open. Key A-3 is now free.6. Return key A-3 to the L-O interlock on breaker B and

unlock it for operation of the breaker during servicing.Reverse the sequence to restore service.Breaker A can be serviced in a similar manner.

Method 6.Function: To prevent paralleling of lines A and B.

Two loads, fed from either source (one tie-breaker).

To prevent the operation of disconnect switch D when breakerA is closed.

To prevent the operation of disconnect switch E when breakerB is closed.

To prevent the opening of the fuse compartment door when theassociated disconnects D or E and breakers A and B areclosed.

Disconnect switch D and breaker A are closed to supply loadM. Disconnect switch E and breaker B are closed to supplyload N. Tie-breaker C is open. Keys A-1 and A-2 are held in theinterlock on breaker A. Key A-3 is held in the L-O interlock ondisconnect D. Keys A-1 and A-4 are held in the interlock on thebreaker B. Key A-5 is held in the L-O interlock on the discon-nect E. The tie-breaker C cannot be closed until either breakerA or B is locked open.

A-2 A-4

LOC

A-3

A-2

L-O

A

D

A

A-1

L-O

C

L-O

A 1

A 2

A 3

L-O LOC

A 5

E

E

L-O

A 1

A 4

E

E

L-C

A-5

A-4

L-C

E

E

E

E

M

B

E

B

N

A-2

LOC

A-1

L-O

A-3

LOC

C

A B

A

D

B

E

L-O

A 1

A 2

L-O

A 1

A 3

E

E

E

E

M N

23

To transfer load N to breaker A, proceed as follows:1. Open breaker B.2. Turn key A-1 in L-O interlock on breaker B to lock it open.

Keys A-1 and A-4 are now free.3. Insert key A-1 in L-O interlock on tie-breaker C and turn

it to unlock. Key A-1 is now held.4. Close tie-breaker C.

Reverse the sequence to restore service through breaker B.Load M can be supplied through breaker B in a similar manner.

To service breaker B, proceed as follows:1. Open breaker B.2. Turn key A-1 in L-O interlock on breaker B to lock it open.

Keys A-1 and A-4 are now free.3. Insert key A-4 in the L-O-C interlock on disconnect E and

turn it to unlock. Key A-4 is now held.4. Open disconnect E.5. Turn key A-4 in L-O-C interlock on disconnect E to lock it

open. Key A-4 is now free.6. Return key A-4 to L-O interlock on breaker B and unlock

it for operation of breaker during servicing.Reverse the sequence to restore service. Breaker A can be ser-viced in a similar manner.

To enter the fuse compartment on line B, proceed as follows:1. Open breaker B.2. Turn key A-1 in L-O interlock on breaker B to lock it open.

Keys A-1 and A-4 are now free.3. Insert key A-4 in L-O-C interlock on disconnect E and turn

to unlock. Key A-4 is now held.4. Open disconnect E.5. Turn key A-4 in L-O-C interlock on disconnect E to lock it

open. Key A-4 is now free.6. Turn key A-5 in L-O interlock on disconnect E to lock it

open. Key A-5 is now free.7. Insert keys A-4 and A-5 in L-C interlock on the fuse com-

partment door and turn it to unlock. Keys A-4 and A-5 arenow held.

8. Open the fuse compartment door.Reverse the sequence to restore service.The fuse compartment on line A can be entered in a similarmanner.

Method 7.Function: To prevent the paralleling of three power sourcesthrough a common tie bus not normally in service.

To permit the feeding of any load bus from a second powersource through the tie bus.

Breakers A, B, and C are normally closed. Breakers D, E, and Fare normally open. Under normal conditions, key A-1 and A-5are held in breaker A interlock, keys A-2 and A-5 are held inbreaker B interlock and keys A-3 and A-5 are held in breaker Cinterlock.To transfer the load from line No. 1 to line No. 2 or lineNo. 3 through tie bus, proceed as follows:

1. Open breaker A.

2. Turn key A-1 in L-O interlock on breaker A to lock thebreaker open. Keys A-1 and A-5 are now free.

3. Insert key A-1 in L-O interlock on breaker D and turn tounlock. Key A-1 is now held.

4. Close breaker D.5. Insert key A-5 in L-O interlock on either breaker E or F and

turn to unlock. Key A-5 is now held.6. Close breaker E or F (whichever is selected).

Reverse the sequence to restore load to line No. 1.

To transfer the load from lines No. 1 and No. 2 to line No. 3through tie bus, proceed as follows:

1. Close breaker D as per steps 1 to 4 above.2. Open breaker B.3. Turn key A-2 in L-O interlock on breaker B to lock the

breaker open. Keys A-2 and A-5 are now free.4. Insert key A-2 in L-O interlock on breaker E and turn to

unlock. Key A-2 is now held.5. Close breaker E.6. Insert one of the A-5 keys from either breaker A or B in

L-O interlock on breaker F and turn to unlock. Key A-5 isnow held.

7. Close breaker F.Reverse the sequence to restore load to lines No. 1 and No. 2.

Method 8.Function: To prevent the paralleling of three power sourcesthrough a common tie bus not normally in service.

To permit the feeding of any load bus from a second powersource through the tie bus only when authorized by supervisor.

To permit only one power source to supply all three load busesthrough the tie bus only when authorized by supervisor.


L-O

A 1

A 5

L-O

A-5

A-1

AE

E

D

Line 1

Load Bus

Tie Bus

L-O

A 2

A 5

L-O

A-5

A-2

BE

E

E

Line 2

L-O

A 3

A 5

L-O

A-5

A-3

CE

E

F

Line 3

24


Breakers A, B, and C are normally closed. Breakers D, E and Fare normally open. Under normal conditions Key A-1 is held inbreaker A interlock, Key A-2 is held in breaker B interlock, andKey A-3 is held in breaker C interlock. Key A-5 is retained bythe supervisor.To transfer the load from line No. 1 to line No. 2 or lines No. 3through tie bus, proceed as follows:

1. Open breaker A.2. Turn key A-1 in L-O interlock on breaker A to lock the

breaker open. Key A-1 is now free.3. Insert key A-1 in L-O interlock on breaker D and turn to

unlock. Key A-1 is now held.4. Close breaker D.5. Insert supervisor’s key A-5 (only one A-5 is available) in

L-O interlock on either breaker E or F and turn to unlock.Key A-5 is now held.

6. Close breaker E or F (whichever is selected).Reverse sequence to restore the load to line No. 1.

To transfer the load from lines No. 1 and No. 2 to line No. 3through tie bus, proceed as follows:

1. Close breaker D as per steps 1 to 4 above.2. Open breaker B.3. Turn key A-2 in L-O interlock on breaker B to lock the

breaker open. Key A-2 is now free.4. Insert key A-2 in L-O interlock on breaker E and turn to

unlock. Key A-2 is now held.5. Close breaker E.6. Insert supervisor’s key A-5 in L-O interlock on breaker F

and turn key to unlock. Key A-5 is now held.7. Close breaker F.

Reverse the sequence to restore the load to lines No. 1 and No. 2.

Method 9.

Function: To prevent the paralleling of incoming primarysources, lines 1 and 2, through primary tie bus disconnect.

To prevent the operation (open or closed) of disconnects underload.

It permits one power source to supply both loads through tie bus.

Under normal conditions, breakers A and B are closed, discon-nects C and D are locked closed, and tie bus disconnect T islocked open. Keys A-1 are held in L-O interlock on breaker A andL-C interlock on tie bus disconnect T. Keys A-2 are held in L-Ointerlock on disconnects C and D. Keys A-3 are held in L-O inter-lock on breaker B and L-C interlock on tie bus disconnect T. KeysA-4 (free keys) are shown removably held in the L-C interlocks ondisconnects C and D.

To transfer load No. 1 from line 1 to line 2 through bus tie dis-connect T, proceed as follows:

1. Open breaker A.2. Turn key A-1 in L-O interlock on breaker A to lock open.

Key A-1 is now free.3. Insert key A-1 in L-C interlock on disconnect C and turn

to unlock. Keys A-1 and A-4 are now held.4. Open disconnect C.5. Turn key A-2 in L-O interlock on disconnect C to lock

open. Key A-2 is now free.6. Insert keys A-2 and free key A-4 (from L-C interlock on

disconnect D) in L-O interlock on bus tie disconnect Tand turn to unlock. Keys A-2 and A-4 are now held.

7. Close bus tie disconnect T.8. Turn key A-3 in L-C interlock on disconnect T to lock

closed. Keys A-1 and A-3 are now free.9. Insert key A-1 in L-O interlock on breaker A and turn to

unlock. Key A-1 is now held.10. Close breaker A.

L-O

A-5

A-1

A

D

Line 1

Load Bus

Tie Bus

L-O

A-5

A-2

B

E

Line 2

L-O

A-5

A-3

C

F

Line 3

L-O

A 1

L-O

A 2

A 5

L-O

A 3

SupervisoryKey

L-C

A-1

A 4

L-C

A-3

A 4

L-C

A 1

A 3

A 2 E

E

E

E

L-O

A-2

A-4E

E

E

E

Line 1

Load 1

L-O

A 2

L-O

A 1

L-O

A 3

L-O

C D

A

Line 2

Load 2

B

T

25


Reverse the sequence to restore load No. 1 to line 1.To transfer load No. 2 from line 2 to line 1 through the bus tiedisconnect T, proceed in a similar manner.

Method 10.Function: To prevent the paralleling of incoming primarysources, lines 1 and 2, through the primary tie bus disconnector the secondary tie bus breaker.

To prevent the operation (open or closed) of the disconnectsunder load.

It permits one power source to supply both loads through eitherthe primary or secondary tie bus.

Under normal conditions, breakers A and B are closed, breaker Cis locked open, disconnects D and E are locked closed, and tie dis-connect T is locked open. Keys A-1 are held in the L-O interlockon breaker A and the L-C interlock on primary tie bus disconnectT. Keys A-2 are held in the L-O interlocks on disconnects D and E.Keys A-3 are held in the L-O interlock on breaker B, and L-C inter-lock on primary tie bus disconnect T. Keys A-4 (free keys) areshown removably held in the L-C interlocks on disconnects D andE. Keys A-5 are held in the L-O interlocks on breakers A and B.

To transfer load No. 1 from line 1 to line 2 through primary bustie disconnect T:

1. Open breaker A.2. Turn key A-1 in the L-O interlock on breaker A to lock

open. Keys A-1 and A-5 are now free.3. Insert key A-1 and “free key A-4” in the L-O interlock on

disconnect D and turn to unlock. Keys A-1 and A-4 arenow held.

4. Open disconnect D.5. Turn key A-2 in L-O interlock on disconnect D to lock

open. Key A-2 is now free.

6. Insert key A-2 and free key A-4 (from the L-C interlockon disconnect E) in the L-O interlock on primary bus tiedisconnect T and turn to unlock. Keys A-2 and A-4 arenow held.

7. Close bus tie disconnect T.8. Turn key A-3 in the L-C interlock on bus tie disconnect T

to lock closed. Keys A-1 and A-3 are now removable.9. Insert Key A-1 in the L-O interlock on breaker A and turn

to unlock. Key A-1 is now held.10. Close breaker A.

Reverse this procedure to restore service to line 1.

Load No. 2 can be supplied from No. 1 through the primary bustie in a similar manner.

To transfer load No. 1 from line 1 to line 2 through secondary tiebreaker C:

1. Open breaker A.2. Turn key A-1 in the L-O interlock on breaker A to lock

open. Keys A-1 and A-5 are now removable.3. Insert key A-5 in the L-O interlock on tie breaker C and

turn to unlock. Key A-5 is now held.4. Cost tie breaker C.

Reverse this procedure to restore service on line 1.

Load No. 2 can be supplied from line No. 1 through the sec-ondary tie breaker C in a similar manner.

Method 11.

L-O

A

C

A 1

B 1

E

E

E

A 2

L-C

A-3

L-C

B-3B 2

L-O

L-O

A 2

LOC

A-4

L O

T-1

B 2

L-O

B-4

LOC

Line 1

F

T

K

Load 1

B

D

G

Line 2

H

L

Load 2

L C

T 1

A 3

A 1

A 4

E

EL-O

A-1

A-2

E

EL-C

B-1

B-2

T 1

B 3

E

EL-C

E

EL-O

E

EL-O

B 1

B 4

E

EL-O

A-5

L-O

L-O

L-C

A C B

L-O

L-C L-O

A 1

A 5

L-O

A 3

A 5

E

E

E

E

Load 1 Load 2

A 1

A 3 A-2

A-4E

E

E

E

A 4A 2

L-O

A 2

A-1

L-C

A 4

A-3

E

E

E

E

Line 1

ED

Line 2

T

26


Function: To prevent the paralleling of incoming primarysources, lines 1 and 2.

To prevent the operation (open or closed) of the disconnectsunder load. (Permits transformer primary disconnects (K & L) toopen and close the transformer magnetizing current.*)

Permits isolating breakers for servicing.

Permits one power source to supply both loads through tie bus.

Under normal conditions, breakers A, B, C, and D are closed, dis-connects E, F, G, H, K, and L are locked closed, and bus tie dis-connect T is locked open. Keys A-1 are held in the L-O interlockon breaker C, and the L-C interlock on bus tie disconnect T. KeysA-2 are held in the L-O interlocks on breaker A and disconnectE. Key A-3 is held in the L-O interlock on disconnect F. Key A-4is held in the L-O interlock on breaker C. Keys B-1 are held in theL-O interlock on breaker D, and the L-C interlock on bus tie dis-connect T. Keys B-2 are held in the L-O interlocks on breaker Band disconnect G. Key B-3 is held in the L-O interlock on dis-connect H. Key B-4 is held in the L-O interlock on breaker D. KeysT-1 are held in the L-O interlocks on disconnects F and H.

To transfer load No. 1 from line 1 to line 2 through bus tie dis-connect T:

1. Open breaker A.2. Turn key A-2 in the L-O interlock on breaker A to lock the

breaker open. Key A-2 is now free.3. Open breaker C.4. Turn key A-4 in the L-O interlock breaker C to lock the

breaker open. Keys A-1 and A-4 are now free.5. Insert key A-2 from the L-O interlock on breaker A and key

A-1 from the L-O interlock on breaker C, in the L-C inter-lock on disconnect F and turn to unlock. Keys A-1 and A-2 are now held.

6. Open disconnect F.

7. Turn key A-3 in the L-O interlock on disconnect F to lockopen. Keys A-3 and T-1 are now free.

8. Insert key T-1 in the L-O interlock on bus tie disconnectT and turn to unlock. Key T-1 is now held.

9. Close bus tie disconnect T.

10. Turn key B-1 in the L-C interlock on bus tie disconnectT to lock closed. Keys A-1 and B-1 are now free.

11. Insert key A-1 in the L-O interlock on breaker C and turnto unlock. Keys A-1 and A-4 are now held.

12. Close breaker C.Reverse the sequence to restore load No. 1 to line 1.

To transfer load No. 2 from line 2 to line 1, proceed in a similarmanner.

To isolate breaker A for servicing:1. Proceed from normal position with operations as in 1

through 7 above.

2. Insert key A-3 in the L-C interlock on disconnect E andturn to unlock. Key A-3 is now held.

3. Open disconnect E.4. Turn key A-2 in the L-O interlock on disconnect E to lock

open. Key A-3 is now free.5. Return key A-2 to breaker A and unlock for operation

during servicing.Reverse the sequence to restore service.

To isolate breaker B for servicing, proceed in a similar manner.

To isolate breaker C for servicing, proceed as follows:1. Open breaker C.2. Turn key A-4 in the L-O interlock on breaker C to lock

breaker open. Keys A-1 and A-4 are now free.3. Insert key A-4 in the L-O-C interlock on disconnect K and

turn to unlock. Key A-4 is now held.4. Open disconnect K.5. Turn key A-4 in the L-O-C interlock on disconnect K to

lock disconnect open. Key A-4 is now free.6. Return key A-4 to breaker C and unlock for operation

during servicing.Reverse the sequence to restore service.

To isolate breaker D for servicing, proceed in a similar manner.

*To prevent primary disconnects (K & L) from opening magne-tizing current only, additional interlocks should be provided fordisconnects K & L.

Method 12.Function: To prevent paralleling lines A and B — requires drop-ping load when shifting from one source to another.

To prevent closing both interrupter switch A and B at the sametime — (permits both interrupter switches to be opened at thesame time).

To prevent operation (open or closed) of either interrupterswitch when breaker is closed.

Permits the breaker to be serviced and operated while bothinterrupter switches are locked open.

A-1EE

A 2

LOC

A-1EE

A-2

LOCL-O

A 1

L-O

L-OA B

27


The Breaker and Interrupter A are shown in closed position.Interrupter B is shown in the open position. Key A-1 is held inbreaker interlock. Key A-2 is held in interrupter A interlock.

To service the breaker:

1. Open the breaker.2. Turn key A-1 in the L-O interlock on breaker to lock

breaker open. Key A-1 is now free.3. Insert key A-1 in the L-O-C interlock on interrupter A and

turn to unlock. Key A-1 is now held.4. Open interrupter A.5. Turn key A-1 in L-O-C interlock on interrupter A to lock

open. Key A-1 is now free.6. Return key A-1 to breaker interlock and unlock for oper-

ation of breaker during servicing.Reverse the sequence to restore service.

To transfer load from interrupter A to interrupter B.1. Proceed from normal positions with operations as in 1

through 4 above.2. Turn key A-1 in L-O-C interlock and key A-2 in L-O interlock

on interrupter A to lock open. Keys A-1 and A-2 are nowfree.

3. Insert key A-1 in L-O-C interlock and key A-2 in L-O inter-lock on interrupter B and turn to unlock. Keys A-1 and A-2 are now held.

4. Close interrupter B.5. Turn key A-1 in L-O-C interlock on interrupter B to lock

closed. Key A-1 is free and key A-2 is held.6. Insert key A-1 in L-O interlock on breaker and turn to

unlock. Key A-1 is now held.7. Close breaker.

Reverse the sequence to restore service through interrupter A.

Method 13.

Function: To prevent operation (closed, open or closed) of inter-rupter switch when breaker is closed.

Permits the breaker to be serviced and operated while the inter-rupter switch is locked open.

The Breaker and Interrupter are shown in closed position,connected to line B. Key A-1 is held in breaker interlock.

To service breaker:1. Open breaker.2. Turn key A-1 in L-O interlock on breaker to lock breaker

open. Key A-1 is now free.3. Insert key A-1 in L-C-O-C interlock on interrupter and turn

to unlock. Key A-1 is now held.4. Open interrupter.5. Turn key A-1 in L-C-O-C interlock on interrupter lock

open. Key A-1 is now free.6. Return key A-1 to breaker interlock and unlock for oper-

ation of breaker during servicing.Reverse the sequence to restore service through either line Aor line B.

To transfer interrupter from line B to line A:1. Proceed from normal position with operations as in steps

1, 2, and 3 above.2. Open interrupter switch from line B and connect to line A.3. Turn key A-1 in L-C-O-C interlock on interrupter to lock

closed. Key A-1 is now free.4. Insert key A-1 in L-O interlock on breaker and turn to


Reverse the sequence to restore service through either line Aor line B.

EA 1

L-O

EA-1

LCOC

A B

Method 14.

Function: To prevent operation (closed, open or closed) of theinterrupter switch when breaker is closed.

To prevent opening the fuse compartment door when the inter-rupter switch A is closed.

To prevent closing the interrupter switch until fuse compart-ment door is locked closed.

Permits the breaker to be serviced and operated while the inter-rupter switch is locked open.

The breaker, fuse compartment door, and interrupter are shownin closed position, connected to line B. Key A-1 is held inbreaker interlock and key A-2 is held in interrupter interlock.

To service breaker:1. Open breaker.2. Turn key A-1 in L-O interlock on breaker to lock breaker

open. Key A-1 is now free.3. Insert key A-1 in L-C-O-C interlock on interrupter and turn

to unlock. Key A-1 is now held.4. Open interrupter.5. Turn key A-1 in L-C-O-C interlock on interrupter to open.

Key A-1 is now free.6. Return key A-1 to breaker interlock and unlock for oper-

ation of breaker during servicing.

Reverse the sequence to restore service through either line Aor line B.To open fuse compartment door:

1. Proceed from normal position with operations as in steps1 through 4 above.

2. Turn key A-2 in L-O interlock on interrupter to lock open.Key A-2 is now free.

3. Insert key A-2 in L-C interlock on fuse compartment doorand turn to unlock. Key A-2 is now held.

4. Open fuse compartment door.


To transfer interrupter from line B to line A:

1. Proceed from normal position with operations as in steps1, 2, and 3 above.

2. Open interrupter switch from line B and connect to line A.3. Turn key A-1 in L-C-O-C interlock on interrupter to lock

closed. Key A-1 is now free.4. Insert key A-1 in L-O interlock on breaker and turn to


Reverse the sequence to restore service through line B.

28


EA 1

L-O

EA 2

L-O

EA-1

LCOC

A B

A-2

L-C

E

29

Layout Information – Primary Section

HVL/VISI-VAC Switchgear - Power Dry Transformer Primary Connection

5 and 15 kV

Approx. Weights: 1200lbs./545kg indoor 1400lbs./636kg outdoor

Notes :1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. See TRANSFORMER section for complete table of transformer dimensions.

2. Extra 1.5" in height (91.5" vs 90") if 1.5" base channel is included in HVL or VISI-VAC.

3. Units are front-aligned (.5" difference in indoor units). Units are rear-aligned if transformer depth is 54" for indoor units, 60" for outdoor units.

34.00864

2.0051

2.0051

2.0051

Top View

Front View

6.00152

6.00152 6.00

152

1.7544

94.002388Min.

(See Note 1)

38.00965

19.00483

97.502477

64.001626

63.501613Min.

(See Note 1)

28.00711

27.75705

OutdoorIndoor

CL

34.00864

2.0051

Floor Plan

4.00102

6.00152 6.00

15260.001524

60.001524Min.

(See Note 1)

26.00660

26.00660

CL

Front View

94.002388Min.

(See Note 1)

38.00965

90.002286

or91.502324

(See Note 2)

34.00864

2.0051

Floor Plan

4.00102

6.00152 6.00

15254.501384

54.001372Min.

(See Note 1)

10.63270

10.13660

CL

34.00864

2.0051

Top View

4.00102

6.00152 6.00

152 2.00 x 4.00 51 102Control Conduit Area

2.00 x 4.00 51 102Control Conduit Area



54.501384

54.001372Min.

(See Note 1)

10.63270

10.13660

CL

DANGERHIGH

VOLTAGE

(See Note 3)

(See Note 3)

(See Note 3)(See Note 3)

30


HVL/VISI-VAC® Switchgear — POWER-CAST® and UNI-CAST™ TransformersPrimary Connection

5 and 15 kV


Notes :1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. See TRANSFORMER section for a table of transformer dimensions. If connection is required to be a hard-

bus connection, the minimum depths shown here will increase, and the factory must be consulted for the transformer dimensions.

2. Extra 1.5" in height (91.5" vs 90") if 1.5" base channel is included in HVL or VISI-VAC.

3. Indoor units are front-aligned (.5 difference at front), outdoor units are not front-aligned.

54.001372Min.

(See Note 1)

34.00864

2.0051

2.0051

2.0051

Top View

Front View

6.00152

6.00152 6.00

152

38.00965

19.00483

97.502477

64.001626

54.001372Min.

(See Note 1)

28.00711

19.75502

OutdoorIndoor

CL

34.00864

2.0051

Floor Plan

4.00102

6.00152 6.00

152

60.001524

26.00660

19.75502

6.25159

CL

Front View

38.00965

90.002286

or91.502324

(See Note 2)

34.00864

2.0051

Floor Plan

4.00102

6.00152 6.00

15254.501384

10.63270

10.13660

CL

34.00864

2.0051

Top View

4.00102

6.00152 6.00

15254.501384

54.001372Min.

(See Note 1)

10.63270

10.13660

CL

DANGERHIGH

VOLTAGE

94.002388Min.

(See Note 1)

94.002388Min.

(See Note 1)

(See Note 3)





(See Note 3)

(See Note 3)

54.001372Min.

(See Note 1)

(See Note 3)

31

HVL/VISI-VAC® Switchgear — Liquid-filled Transformer Primary Connection to 3750 kVA (see note 5)

5 and 15 kV


Notes :1. Liquid-filled transformer standard enclosure dimensions are given in the TRANSFORMER section. They are applicable only for mineral-oil units under certain conditions (see TRANSFORMER

section for details).

2. Extra 1.5" in height (91.5" vs 90") if 1.5" base channel is included in HVL or VISI/VAC.

3. Units are not necessarily front or rear aligned.

4. Transition section height is 65" if transformer is up to 2500 kVA, 85" if transformer is over 2500 kVA.

5. If transformer is over 3750 kVA, variations to the dimensions shown here will be necessary.


H(See Note 1)

19.00483

65.00 or 85.00 1651 2159Transition Section Height(See Note 4)

38.00965

D1D1

D2D2

38.00965

Indoor

Front View

38.00965

90.002286

or91.502324

(See Note 2)

34.00864

2.0051

Floor Plan

4.00102

6.00152 6.00

15254.501384

CL

34.00864

2.0051

Top View

4.00102

6.00152 6.00

15254.501384

20.50521

20.50521

CL

DANGERHIGH

VOLTAGE

34.00864

2.0051

2.0051

2.0051

Top View

Front View

6.00152

6.00152 6.00

152

H(See Note 1)

38.00965

19.00483

97.502477

64.001626

28.00711

38.00965

Outdoor

CL

34.00864

2.0051

Floor Plan

4.00102

6.00152 6.00

15260.001524

26.00660

CL


38.00965


D1




(See Notes 1, 3, 5)(See Notes 1, 3, 5)

(See Notes 1, 3, 5)

D1

(See Notes 1, 3, 5)

32


Metal-Clad Switchgear — POWER-DRY™, POWER-CAST® and UNI-CAST™ Transformers PrimaryConnection

Approx. Weights (less breakers): 2200lbs./999kg indoor 2700lbs./1226kg outdoor1200 A breaker: 360lbs./163kg 2000 A breaker: 410lbs./186kg 3000 A breaker: 480lbs./218kg

Notes :1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. See TRANSFORMER section for a complete table of transformer dimensions.

2. Units will be rear-aligned when transformers have the depths shown. For transformers with larger depths, transformer will protrude in rear.

20.005088.00

203

Floor Plan

20.00508

96.932462

51.301303

1.7043

.103

8.00203

5.90150

6.30160

54.001372

(Power-Cast, Uni-Cast)or

60.001524Min.

(Power-Dry)(See Note 1)

41.181046

(Fixed)(Power-Cast, Uni-Cast)

or35.18

894(Fixed)

(Power-Dry)

CL

ControlConduitArea

109.102771

51.301303

54.001372


60.001524Min.


49.181249

(Fixed)(Power-Cast, Uni-Cast)

or43.18

1097(Fixed)

(Power-Dry)

CL

Top View

Front View

36.00914

22.00559

3.0076

108.502756

Outdoor

94.002388Min.

(See Note 1)

Indoor

18.00457

9.00229

Top View

Front View

3.5089

9.00229

9.00229

1.0025

8.00203

92.002337

(With Door)

95.002413

36.00914

22.00559

3.0076

54.001372Min.

(See Note 1)

37.00940

(Fixed)

94.002388Min.

(See Note 1)

2.0051

1.7551

8.00203

10.12257

CL

ControlConduitArea

18.00457

9.00229

Floor Plan

3.5089

9.00229

9.00229

1.0025

91.002311

54.001372Min.

(See Note 1)

47.1211972.00

51

.205

8.00203

2.5064

3.5089

1.0025

37.00940

(Fixed)

CL

ControlConduitArea

(See Note 2)

(See Note 2) (See Note 2)

(See Note 2)

Roof Overhang

5 kV and 15 kV

33


Metal-Clad Switchgear — Liquid-Filled Transformer Primary Connection to 3750 kVA (see note 3)

Approx. Weights (less breakers): 2200lbs./999kg indoor 2700lbs./1226kg outdoor1200 A breaker: 360lbs./163kg 2000 A breaker: 410lbs./186kg 3000 A breaker: 480lbs./218kgNotes:

1. Liquid-filled transformer standard enclosure dimensions are given in the TRANSFORMER section. They are applicable only for mineral-oil units under certain conditions (see TRANSFORMERsection for details).

2. Flange height is 65" if transformer is up to 2500 kVA, 85" if transformer is over 2500 kVA.3. If transformer is over 3750 kVA, variations to the dimensions shown here will be necessary.4. Units are not necessarily front or rear aligned. Transformer radiators may extend behind switchgear.

20.005088.00

203

Floor Plan

6.30160

20.00508

96.932462

49.181249

45.001143

1.7043

.103

8.00203

5.90150

CL

109.102771

49.181249

8.00203

CL

Top View

Front View

36.00914

22.00559

108.502756

Outdoor

H(See Note 1)

22.00559

3.0076

D1

D2

D1(See Note 1)

D1(See Note 1)

38.00965

38.00965

38.00965

38.00965

Front View

36.00914

95.002413

Indoor

18.00457

9.00229

Top View

3.5089

9.00229

9.00229

1.0025

92.002337

(With Door)

45.0011432.00

51

1.7544

8.00203

1.0025

3.5089

CL

18.00457

9.00229

Floor Plan

3.5089

9.00229

9.00229

1.0025

91.002311

2.0051

.205

8.00203

2.5064

CL

D1

D2

65.00 or 85.00 1651 2159 Flange Height (See Note 2)

H(See Note 1)

3.0076

65.00 or 85.00 1651 2159 Flange Height (See Note 2)

(See Note 1)

(See Note 1)

Radiators MayExtend Behind

Switchgear.(See Note 4)

Radiators MayExtend Behind

Switchgear.(See Note 4)

Roof Overhang

5 kV and 15 kV

34


HVL Switchgear — POWER-DRY™ and POWER-CAST® Transformers Primary Connection


Notes :1. Please consult the manufacturing location for 25 kV transformer enclosure dimensions.

2. Units are neither front nor rear aligned.

40.001016

5.00127

Top View

Front View

6.00152

6.00152 6.00

152

94.002388Min.

(See Note 1)

48.001219

24.00610

127.003226

90.002286

66.001676Min.

(See Note 1)32.75

832

8.00203

40.751035

Outdoor

CL

40.001016

4.00102

Floor Plan

4.00102

6.00152 6.00

15286.002184

38.75984

32.75832

CL

Indoor

Front View

94.002388Min.

(See Note 1)

48.001219

24.00610

120.003048

44.001118

2.0051

Floor Plan

4.00102

6.00152 6.00

15280.502045

66.001676Min.

(See Note 1)

66.001676Min.

(See Note 1)32.75

83233.25

845

CL

44.001118

2.0051

Top View

4.00102

6.00152 6.00

152 2.00 x 4.00 51 102Control Conduit Area



2.00 x 4.00 51 102Control Conduit Area80.50

2048

66.001676Min.

(See Note 1)

33.25845

32.75832

CL

DANGERHIGH

VOLTAGE

(See Note 2)

(See Note 2)

(See Note 2)

6.00152

(See Note 2)

25 kV

35


HVL Switchgear — Liquid-filled Transformer Primary Connection to 3750 kVA (see note 4)

Approx. Weights: 2200lbs./908kg indoor 2700lbs./1135kg outdoorNotes :1. Liquid-filled transformer standard enclosure dimensions are given in the TRANSFORMER section. They are applicable only for mineral-oil units under certain conditions (see TRANSFORMER


2. Transition section height is 65" for transformers up to 2500 kVA, 85" for transformers over 2500 kVA.

3. Units are not necessarily front or rear-aligned.

4. If transformer is over 3750 kVA, slight variations to the dimensions shown here will be necessary.

40.001016

(See Note 2)

44.001118

44.001118

(See Note 2)

40.001016

(See Note 2)

2.0051

5.00127

2.0051

Top View

Front View

6.00152

6.00152 6.00

152

H(See Note 1)

127.003226

90.002286

42.001067

Outdoor

CL

Floor Plan

4.00102

4.00102

6.00152 6.00

15286.002184

39.501033

CL

59.001499

H(See Note 1)



59.001499

D1 D1

Indoor

Front View

48.001219

24.00610

48.001219

24.00610

120.003048

2.0051

Floor Plan

4.00102

6.00152 6.00

152

34.00864

CL

2.0051

Top View(See Note 3)

4.00102

6.00152 6.00

15280.502045

80.502045

34.00864

59.001499

CL

DANGERHIGH

VOLTAGE

D1

D2

(See Notes 1, 3, 4)

D1

D2

(See Notes 1, 3, 4)





(See Notes 1, 3, 4) (See Notes 1, 3, 4)

25 kV

36


HVL Switchgear — POWER-CAST® Transformer Primary Connection

34 kV


Notes :1. Please contact the manufacturing location for 34 kV POWER-CAST transformer enclosure dimensions.

2. CT = cabinet depth ÷ 2. Units are not necessarily front or rear-aligned.

Indoor

56.001422

2.0051

Top View

4.00102

6.00152 6.00

152

80.502045

38.75984

CL CL

Front View

60.001524

24.00610

120.003048

2.0051

56.001422

2.0051

Floor Plan

4.00102

6.00152 6.00

152

80.502045

39.501003

CL

DANGERHIGH

VOLTAGE

DANGERHIGH

VOLTAGE

24.00610

CL

52.001321

5.00127

Top View

6.00152

6.00152 6.00

152

90.002286

44.751137

Outdoor

60.001524

127.003226

52.001321

4.00102

Floor Plan

4.00102

6.00152 6.00

152

86.002184

45.001143

CT(See Note 2)

CT(See Note 2)

62.001575Min.

(See Note 1)

112.00 2845Min.

(See Note 1)

62.001575Min.

(See Note 1)

CT(See Note 2)

2.0051

112.002845Min.

(See Note 1)

62.001575Min.

(See Note 1)

CT(See Note 2)

62.001575Min.

(See Note 1)

Front View





37


HVL Switchgear — Liquid-Filled Transformer Primary Connection to 3750 kVA (see note 4)


Notes:1. Liquid-filled transformer standard enclosure dimensions are given in the TRANSFORMER section. They are applicable only for mineral-oil units under certain conditions (see TRANSFORMER


2. Transition section height is 65" if transformer is up to 2500 kVA, 85" if transformer is over 2500 kVA.



Indoor

56.001422

2.0051

Top View

4.00102

6.00152 6.00

152

80.502045

(See Notes 1, 3, 4)


(See Notes 1, 3, 4)

37.50953

D1

D2

D1

D2

CL CL

Front View Front View

H(See Note 1)

60.001524

24.00610

120.003048

56.001422

59.001499

2.0051

Floor Plan

4.00102

6.00152 6.00

152

59.001499

59.001499

80.502045

D1

39.501003

CL

DANGERHIGH

VOLTAGE

DANGERHIGH

VOLTAGE

H(See Note 1)

24.00610

D1

59.001499

CL

52.001321

5.00127

Top View

6.00152

6.00152 6.00

152

90.002286

49.501257

Outdoor

60.001524

127.003226

52.001321

4.00102

Floor Plan

4.00102

6.00152 6.00

152

86.002184

41.501054





65.00 or 85.00 1651 2159Transition Section Height (See Note 2)

65.00 or 85.00 1651 2159Transition Section Height (See Note 2)

34 kV

38


QED Switchboard — POWER-DRY™ Transformer Primary Connection

600 V

Weight will vary according to switchboard components.

Notes :1. Transformer dimensions vary depending upon voltage class, kVA size and BIL rating. See TRANSFORMER section for a complete table of transformer dimensions.

2. Please consult QED layout manual for conduit area dimensions and section width.

Indoor

Front View

94.002388Min.

(See Note 1)

91.502324

Floor Plan

54.001372

54.001372Min.

(See Note 1)

30.00762

30.00762

CL

Top View

54.001372

30.00762

30.00762

54.001372Min.

(See Note 1)CL

W(See Note 2)

39

Layout Information – Transformer Section

5 kV Class - 30 kV BIL

80°C Temperature Rise 115°C/150°C Temperature Rise

kVA Height Width Weight Height Width Weight (lbs.)(H) (W) (lbs.) (H) (W) (115°C/150°C)

225 94.0 56.0 2300 94.0 56.0 2300/2100

300 94.0 56.0 3300 94.0 56.0 2500/2300

500 94.0 56.0 4200 94.0 56.0 3500/3300

750 94.0 72.0 5500 94.0 56.0 4400/4200

1000 94.0 84.0 6400 94.0 72.0 5800/5500

1500 94.0 84.0 8300 94.0 84.0 6700/6400

2000 94.0 84.0 10500 94.0 84.0 8600/8300

2500 102.0 108.0 13000 94.0 96.0 10800/10500

3000 112.0 108.0 18000 102.0 108.0 13500/13000

3750 112.0 108.0 22000 112.0 108.0 18500/18000

15 kV Class - 45 and 60 kV BIL



225 94.0 56.0 3400 94.0 56.0 3400/3200

300 94.0 56.0 3900 94.0 56.0 3600/3400

500 94.0 72.0 5100 94.0 56.0 4100/3900

750 94.0 72.0 5800 94.0 72.0 5400/5200

1000 94.0 84.0 7300 94.0 72.0 6100/5800

1500 94.0 84.0 9000 94.0 84.0 7600/7300

2000 94.0 96.0 10800 94.0 84.0 9300/9000

2500 102.0 108.0 13500 94.0 96.0 11300/10800

3000 112.0 108.0 18500 102.0 108.0 14000/13500

3750 112.0 108.0 22500 112.0 108.0 19000/18500



kVA Height) Width Weight Height Width Weight (lbs.)(H) (W) (lbs.) (H) (W) (115°C/150°C)

225 94.0 56.0 3800 94.0 56.0 3700/3500

300 94.0 56.0 4600 94.0 56.0 4000/3800

500 94.0 72.0 6000 94.0 72.0 5000/4800

750 94.0 84.0 7400 94.0 84.0 6400/6200

1000 94.0 84.0 8400 94.0 84.0 7700/7400

1500 94.0 96.0 10600 94.0 96.0 9100/8800

2000 102.0 108.0 13100 94.0 96.0 10900/10600

2500 102.0 108.0 14600 102.0 108.0 13600/13100

3000 120.0 120.0 22100 102.0 108.0 15000/14600

3750 120.0 120.0 27100 120.0 120.0 22600/22100

Notes:

These dimensions are for cable-connected primaries only. For primaries above 530A, theprimary must be bus-connected. Please contact the factory for these cases.

For units in the 5 kV class with 45 or 60 kV BIL, use dimensions shown in the 15 kV class.

Units are 54" deep except for units over 108" wide x 102" high, which will be 66" deep.

It is recommended that ventilation openings have 12" min. clearance from any obstacle tosatisfy NEC 450-9.

All weights are approximate; for copper windings add 15% to weight.

Units close-coupled to 4001-5000 A switchgear are 60" deep minimum. Contact the factoryfor dimensions of units close-coupled to secondary metal-clad switchgear or when ULListing is required.

Indoor POWER-DRY™ Transformers

600 V, 5 kV and 15 kV (contact factory for 25 kV units)

H

W

600 V Class – 10-30 kV BIL



225 94.0 56.0 2300 94.0 56.0 2300/2100

300 94.0 56.0 3300 94.0 56.0 2500/2300

500 94.0 56.0 4200 94.0 56.0 3500/3300

750 94.0 72.0 5500 94.0 56.0 4400/4200

1000 94.0 84.0 6400 94.0 72.0 5800/5500

1500 94.0 84.0 8300 94.0 84.0 6700/6400

2000 94.0 84.0 10500 94.0 84.0 8600/8300

2500 102.0 108.0 13000 94.0 96.0 10800/10500

3000 102.0 108.0 17100 102.0 108.0 13500/13000

3750 112.0 108.0 22000 102.0 108.0 17600/17100

40


5 kV Class - 30kV BIL



225 94.0 56.0 3000 94.0 56.0 3000/2800

300 94.0 56.0 4000 94.0 56.0 3200/3000

500 94.0 72.0 5000 94.0 56.0 4200/4000

750 94.0 84.0 6300 94.0 72.0 5200/5000

1000 94.0 96.0 7300 94.0 84.0 6600/6300

1500 102.0 108.0 9500 94.0 96.0 7600/7300

2000 108.0 116.0 11900 102.0 108.0 9800/9500

2500 108.0 116.0 13000 108.0 116.0 12300/11800

3000 108.0 116.0 16000 108.0 116.0 14000/13500

15 kV Class - 45 and 60 kV BIL



225 94.0 56.0 4100 94.0 56.0 4100/3900

300 94.0 56.0 4600 94.0 56.0 4300/4100

500 94.0 72.0 5800 94.0 56.0 4800/4600

750 94.0 84.0 6600 94.0 72.0 6100/5900

1000 94.0 96.0 8200 94.0 84.0 6800/6600

1500 102.0 108.0 10200 94.0 96.0 8500/8200

2000 108.0 116.0 12100 102.0 108.0 10500/10200

2500 108.0 116.0 14500 108.0 116.0 12600/12100

3000 108.0 116.0 17000 108.0 116.0 15000/14500



kVA Height) Width Weight Height Width Weight (lbs.)(H) (W) (lbs.) (H) (W) (115°C/150°C)

225 94.0 56.0 4500 94.0 56.0 4400/4200

300 94.0 56.0 5300 94.0 56.0 4700/4500

500 94.0 72.0 6700 94.0 72.0 5600/5400

750 94.0 84.0 8100 94.0 72.0 7000/6800

1000 94.0 96.0 9300 94.0 84.0 8400/8100

1500 102.0 108.0 11700 94.0 96.0 9900/9600

2000 108.0 116.0 14000 102.0 108.0 12000/11700

2500 108.0 116.0 15500 108.0 116.0 14500/14000

3000 108.0 116.0 18000 108.0 116.0 16000/15500

Notes:

These dimensions are for cable-connected primaries only. For primaries above 530A, theprimary must be bus-connected. Please contact the factory for these cases.

For units in the 5 kV class with 45 or 60 kV BIL, use dimensions shown in the 15 kV class.

Units are 60" deep except for units over 108" wide x 102" high, which will be 66" deep.


All weights are approximate. Add 15% to weight for copper windings. Contact the factory forunits close-coupled to HVL or metal-clad secondary swtichgear for when UL Listing isrequired.

Outdoor POWER-DRY Transformers

5 and 15 kV (for 25 kV units consult factory)

W

H

41


POWER-DRY™ TransformerFront and Rear Access Air Terminal Chamber


Note:1. Transformer dimensions vary depending upon voltage class, kVA size and BIL rating. See TRANSFORMER section for complete table of transformer dimensions.


30.00762

94.002388

30.00762

24.00610

3.0076

6.00152

94.00 2388

(See Note 1)

94.00 2288Min.

(See Note 1)

60.001524Min.

(See Note 1)

60.001524Min.

(See Note 1)

94.002388

54.001372Min.

(See Note 1)

60.00 1524

60.001542

48.00 1219

6.00152

6.00152

Indoor

Outdoor

Top View

54.001372Min.

(See Note 1)

Floor Plan

Top View

42.001067

6.00152

54.001372

24.00610

3.0076

6.00152

Floor Plan

42.001067

6.00152

54.001372

42


POWER-DRY™ TransformerEnd Access Air Terminal Chamber


Note:1. Transformer dimensions vary depending upon voltage class, kVA size and BIL rating. See TRANSFORMER section for a complete table of transformer dimensions.

Front View

Floor Plan

20.00508

94.002388

Front View

20.00508

16.00406

2.0051

42.001067

6.00152

54.001372

94.00 2388Min.

(See Note 1)

94.002288Min.

(See Note 1)

60.001524Min.

(See Note 1)

94.002388

16.00406

2.0051

42.001067

6.00152

54.001372

6.00152

14.00356

3.0076

54.001372Min.

(See Note 1)

54.001372Min.

(See Note 1)

60.001524

60.001542Min.

(See Note 1)

60.001542

48.00 1219

6.00152

Indoor

Outdoor

Top View

Top View

Floor Plan

Indoor UNI-CAST™ Transformers5 and 15 kV primary (Cable-Connected only)600 V secondary

kVA Height (H) Width (W) Depth (D) Weight

500 94.00 72.00 54.00 4000

750 94.00 78.00 54.00 5500

1000 94.00 84.00 54.00 6000

1500 94.00 90.00 54.00 8000

2000 94.00 96.00 54.00 10000

2500 94.00 102.00 54.00 12000

3000 100.00 108.00 60.00 14000

Please consult the factory for dimensions of transformersdeviating from the following characteristics:

3 Phase, 60 Hz

High Voltage: 4160, 12470, 13200 and 13800 V, 95 kV BIL max.

Low Voltage: 480Y/277, 480 Delta, 208Y/120, 10 kV BIL max.208Y/120 not available above 1000 kVADelta-Delta, Wye-Delta and Delta-Wye connections only

Taps: ±2 at 2.5% above and below normal

Temp. Rise: 100°C over 30°C ambient

Impedance: 5.75%

Non-Loss Evaluated Designs

Noise Levels: Per NEMA TR1

Aluminum Windings and Terminations

All terminations tin-plated

Overload capacity: 33%Notes:

Primaries rated above 530 A must be bus-connected; please contact the factory for thesecases.

All weights are approximate.


Coordinated with HVL, VISI-VAC and METAL-CLAD primary and QED and PZ III secondary

43


H

W

D

44


Outdoor UNI-CAST™ Transformers5 and 15 kV primary (Cable-Connected only)600 V secondary


500 94.00 72.00 54.00 4350

750 94.00 78.00 54.00 5850

1000 94.00 84.00 54.00 6350

1500 94.00 90.00 54.00 8350

2000 94.00 96.00 54.00 10350

2500 94.00 108.00 54.00 12500

3000 100.00 114.00 60.00 14500


3 Phase, 60 Hz

High Voltage: 4160, 12470, 13200 and 13800 V, 95 kV BIL max.




Impedance: 5.75%



Aluminum Windings and Terminations


Overload capacity: 33%Notes:




Coordinated with HVL, VISI-VAC and Metal-Clad primary and QED and PZ III secondary

H

W

D

45


Indoor POWER-CAST® Transformers5 and 15 kV primary (Cable-Connected only)600 V secondary


500 94.00 84.00 54.00 5600

750 94.00 84.00 54.00 6300

1000 94.00 90.00 54.00 8350

1500 100.00 96.00 54.00 11600

2000 100.00 108.00 60.00 13500

2500 100.00 108.00 60.00 15950

3000 112.00 124.00 62.00 18750

3750 112.00 124.00 62.00 23500


3 Phase, 60 Hz

High Voltage: 2.4 kV - 13.8 kV, 110 kV BIL max.




Impedance: 5.75%



Copper Windings and Terminations


Overload capacity: 33% or 50% (50% not available for trans-formers 500 - 750 kVA or above 5000 kVA)Notes:


Consult the factory for Metal-Clad and HVL secondaries.



Coordinated with HVL, VISI-VAC and Metal-Clad primary and QED and PZ III secondary

H

W

D

46


Outdoor POWER-CAST® Transformers5 and 15 kV primary (Cable-Connected only)600 V secondary


500 94.00 84.00 54.00 5950

750 94.00 84.00 54.00 6650

1000 94.00 90.00 54.00 8700

1500 100.00 96.00 54.00 11950

2000 100.00 108.00 60.00 13850

2500 100.00 108.00 60.00 16300

3000 112.00 124.00 62.00 19100

3750 112.00 124.00 62.00 23850


3 Phase, 60 Hz

High Voltage: 2.4 kV - 13.8 kV, 110 kV BIL max.




Impedance: 5.75%



Copper Windings and Terminations


Overload capacity: 33% or 50% (50% not available for trans-formers 500 - 750 kVA or above 5000 kVANotes:


Consult the factory for Metal-Clad and HVL secondaries.



Coordinated with HVL, VISI-VAC, and Metal-Clad primary and QED and PZ III secondary

H

W

D

47


POWER-CAST® and UNI-CAST™ TransformerAir-Terminal Chambers

Front View

36.00914

13.00330

Indoor/Outdoor

Top View

Variable

Variable

1.5038

1.5038

1.5038

1.5038

Floor Plan

Variable

Variable

Variable

Variable

RemovableTop Plate

Notes:1. Standard ATC is end access only. Front and rear access ATC is available but will increase the width of the ATC.

2. Suitable for indoor or outdoor use.

3. Removable top-plate is provided on top-feed applications.

4. Dimensions marked as variable will vary with voltage class, lightning arresters and accessories.

48

OA Cooling, 208Y/120 V or 480 V Delta Secondary – 30 kv BIL Max.

Width (W) Width (W) Height Approx.kVA Figure 1 Figure 2 (H) D1 D2 Weight

500 52 61 70 20 30 5500

750 59 68 70 21 33 7000

1000 61 70 70 20 38 7500

1500 64 73 70 22 51 9500

OA Cooling, 480Y/277 V Secondary – 30 kV BIL Max.


500 52 61 70 20 30 5500

750 59 68 70 21 33 6500

1000 61 70 70 21 41 7500

1500 64 73 70 22 49 9000

2000 73 82 70 23 45 11500

2500 74 83 85 24 48 14500

3000 75 84 96 26 52 15500

3750 76 85 96 27 67 19500

OA/FFA or OA/FA Cooling, 208Y/120 V or 480 V Delta Secondary – 30 kV BIL Max.


500 52 61 77 26 39 5500

750 59 68 77 27 38 7000

1000 61 70 77 26 38 7500

1500 64 73 77 28 51 9500

OA/FFA or OA/FA Cooling, 480Y/277 V Secondary – 30 kV BIL Max.


500 52 61 77 26 39 5500

750 59 68 77 27 38 6500

1000 61 70 77 27 41 7500

1500 64 73 77 28 49 9000

2000 73 82 77 29 45 11500

2500 74 83 92 30 48 14500

3000 75 84 98 31 52 15500

3750 76 85 98 32 67 19500


Aluminum windings, 3 Phase, 60 Hz, Taps: ± 2.5% 2 aboveand 2 below normal, 65 degree rise over 30 degree ambient,4.5% Impedance at 500 kVA, 5.75% Impedance 750 kVA andabove.

Standard accessories: Padlockable tap changer (de-energizedoperation), 1" upper filter plug through 2500 kVA, 1" upper filtervalve above 2500 kVA, 1" drain valve with 3⁄8" sampler through2500 kVA, 2" drain valve with 3⁄8" sampler above 2500 kVA,pressure relief valve for all kVA sizes, pressure relief devicewithout alarm contacts on transformer cover above 2500 kVA,magnetic liquid-level gauge without alarm contacts, dial-typethermometer without alarm contacts, pressure/vacuum gaugewith bleeder connection, without alarm contacts.

Figures 1 and 2 include 3" flange on primary (included in width

given in tables), for connection to HVL, VISI/VAC or Metal-CladSwitchgear; for Primary ATC subtract 3" from width given intable and add width of appropriate ATC on page 51.

Figure 1 includes 3" flange on secondary (included in widthgiven in tables), for connection to Indoor PZ III Switchgear. ForSecondary ATC subtract 3" from width given in table and addwidth of appropriate ATC on page 51.

Figure 2 includes 12" throat on secondary (included in widthgiven in tables), for connection to QED switchboard or outdoorPZ III Switchgear. For Secondary ATC subtract 12" from widthgiven in table and add width of appropriate ATC on page 51.


Indoor and Outdoor Liquid-Filled Transformers (Mineral Oil Only)

12470 V Delta, 13200 V Delta, 13800 V Delta Primary – 95 kv BIL max.

D2

D1

W

H

Figure 1

W

H

Figure 2

49




500 62 71 70 20 28 5500

750 67 76 70 21 32 7000

1000 74 83 70 22 32 8000

1500 75 84 70 22 49 10000

2000 81 90 70 23 45 12000

2500 82 91 85 24 52 13500

3000 83 92 96 27 55 16500

3750 84 93 96 27 65 20500



500 62 71 77 26 37 5500

750 67 76 77 27 37 7000

1000 74 83 77 28 37 8000

1500 75 84 77 28 49 10000

2000 81 90 77 29 45 12000

2500 82 91 92 30 52 13500

3000 83 92 98 32 55 16500

3750 84 93 98 32 65 20500



Standard Accessories: Padlockable tap changer (de-energizedoperation), 1" upper filter plug through 2500 kVA, 1" upper filtervalve above 2500 kVA, 1" drain valve with 3⁄8" sampler through2500 kVA, 2" drain valve with 3⁄8" sampler above 2500 kVA, pres-sure relief valve for all kVA sizes, pressure relief device withoutalarm contacts on transformer cover above 2500 kVA, magneticliquid-level gauge without alarm contacts, dial-type thermome-ter without alarm contacts, pressure/vacuum gauge withbleeder connection, without alarm contacts.

Figures 1 and 2 include 10" flange on primary (included in widthgiven in tables), for connection to HVL Switchgear ; for PrimaryATC subtract 10" from width given in table and add width ofappropriate ATC on page 51.




24940 V Delta Primary – 125 kV BIL max.

D2

D1

W

H

Figure 1

W

H

Figure 2

29.50749

59.001499

59 Inch Dimension isover Primary Flange

50




500 64 73 70 22 29 6000

750 68 77 70 22 32 7500

1000 68 77 70 22 38 8000

1500 74 83 70 22 42 9500

2000 75 84 70 23 58 11500

2500 85 94 69 25 52 14000

3000 84 93 96 27 57 17000

3750 84 93 96 27 69 20500



500 64 73 77 28 38 6000

750 68 77 77 28 37 7500

1000 68 77 77 28 38 8000

1500 74 83 77 28 42 9500

2000 75 84 77 29 58 11500

2500 85 94 76 31 52 14000

3000 84 93 98 32 57 17000

3750 84 93 98 32 69 20500



Standard Accessories: Padlockable tap changer (de-ener-gized operation), 1" upper filter plug through 2500 kVA, 1"upper filter valve above 2500 kVA, 1" drain valve with 3⁄8"sampler through 2500 kVA, 2" drain valve with 3⁄8" samplerabove 2500 kVA, pressure relief valve for all kVA sizes, pressurerelief device without alarm contacts on transformer coverabove 2500 kVA, magnetic liquid-level gauge without alarmcontacts, dial-type thermometer without alarm contacts, pres-sure/vacuum gauge with bleeder connection, without alarmcontacts.

Figures 1 and 2 include 10" flange on primary (included in widthgiven in tables), for connection to HVL Switchgear ; for PrimaryATC subtract 3" from width given in table and add width ofappropriate ATC on page 51.




34500 V Delta Primary – 150 kV BIL max.

D2

D1

W

H

Figure 1

W

H

Figure 2

29.50749

59.001499

59 Inch Dimension isover Primary Flange

Liquid-Filled TransformerAir-Terminal Chambers/Boxes

Primary and Secondary Air Terminal Box

110 BIL and Below (15 kV class)

kVA A B C D

225-2500 18 38 29 373000-5000 24 38 36 44

125 BIL (25 kV class)

kVA A B C D

225-2500 24 38 36 443000-5000 24 38 36 44

Primary and Secondary Full Length Air TerminalChamber

110 BIL and Below (15 kV class)

kVA A B C D E

225-2500 18 38 55 10 673000-5000 24 44 75 10 87

125 BIL (25 kV class)

kVA A B C D E

225-2500 24 38 55 10 673000-5000 24 44 75 10 87

Note: For primary or secondary intermediate or station class arresters use 125 BIL cabinetfor 125 BIL and below.

51


D

OutsideTankWall

CBushingHeight

Removable Sill

RemovableCover Panel

EATC

Height

BATC Width A

ATC Depth

CLBushing

E - 2.00 51 Inside

B - 4.00 102 Inside

OutsideTank Wall

AATB Depth

BATB Width

DATB

Height

3.0076

C

Removable Plate

CLBushing

B - 6.00 152

A - 10.00 254

A - 3.00 76

D - 4.00 102 Inside

B - 4.00 102 Inside

52

Layout Information – Secondary Section

POWER-DRY™ Transformer – HVL/VISI-VAC® SwitchgearSecondary Connection (3 wire secondary only – see note 3)

Approx Weights: 1200lbs./545kg indoor 1400lbs./636kg Outdoor

Notes:1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. See TRANSFORMER section for a complete table of indoor POWER-DRY transformer dimensions.

Contact the manufacturing location for outdoor POWER-DRY dimensions.

2. Indoor and outdoor units are front-aligned (.5" difference in indoor units).

3. Please contact the manufacturing location for 4-wire secondaries.

34.00864

2.0051

Floor Plan

4.00102

6.001526.00

152 60.001524

60.001524Min.

(See Note 1)

45.001143

45.001143

CL

2.00 x 4.00 51 102 Control Conduit Area

(See Note 2)

34.00864

2.0051

Top View

Front View

6.00152

6.001526.00

152

1.75 (Typ.) 44

1.75 (Typ.) 44

94.002388Min.

(See Note 1)

38.00965

22.00559

97.502477

64.001626

63.501613Min.

(See Note 1)

47.00119446.75

1187

Outdoor

CL

3.0076

(Flange)

3.0076

(Flange)

(See Note 2)

Indoor

Front View

94.002388Min.

(See Note 1)

90.00 2286

38.00965

22.00559

34.00864

2.0051

Floor Plan

4.00102

6.001526.00

15254.501384

54.001372Min.

(See Note 1)

39.501003

39.00991

CL

34.00864

2.0051

Top View

4.00102

6.001526.00

152




54.501384

54.001372Min.

(See Note 1) 39.501003

39.00991

DANGERHIGH

VOLTAGE

DANGERHIGH

VOLTAGE

CL

(See Note 2)

(See Note 2)

5 kV

53


POWER-CAST® Transformer – HVL/VISI-VAC® SwitchgearSecondary Connection (3 wire secondary only-See note 3)

5 kV


Notes:1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. Please contact the manufacturing location for transformer dimensions. Standard transformer dimensions

are not available for POWER-CAST transformers with 5 kV class secondaries.

2. Indoor units are front-aligned (.5" difference), outdoor units have a 6" difference in alignment.


34.00864

2.0051

Floor Plan

4.00102

6.001526.00

152

6.00152

60.001524

45.001143

CL


(See Note 2)

34.00864

2.0051

Top View

Front View

6.00152

6.001526.00



38.00965

22.00559

97.502477

64.001626

54.001372Min.

(See Note 1) 47.001194

39.00991

Outdoor

CL

3.0076

(Flange)

(See Note 2)

94.002388Min.

(See Note 1)

54.001372Min.

(See Note 1)

39.00991

54.001372Min.

(See Note 1)

39.00991

Indoor

Front View

94.002388Min.

(See Note 1)

90.00 2286

38.00965

22.00559

3.0076

Flange

34.00864

2.0051

Floor Plan

4.00102

6.001526.00

15254.501384

39.501003

CL

34.00864

2.0051

Top View

4.00102

6.001526.00

152


54.501384

54.001372Min.

(See Note 1) 39.501003

39.00991

DANGERHIGH

VOLTAGE

DANGERHIGH

VOLTAGE

CL

(See Note 2)

(See Note 2)

54


Liquid-filled Transformer – HVL/VISI-VAC® SwitchgearSecondary Connection (3-wire secondary only-see note 5) To 3750 kVA (see note 4)

5 kV


Notes:1. Please contact the factory for transformer dimensions. Standard liquid-filled transformer dimensions are not available for units with 5 kV class secondaries.

2. Extra 1.5" in height if base channel is included in HVL/VISI-VAC.




34.00864

2.0051

4.00102

6.001526.00

152 60.001524


34.00864

2.0051

Top View

Front View

6.00152

6.001526.00

152

38.00965

22.00559

97.502477

64.001626

28.00711

Outdoor

3.00 (Flange on HVL) 76

3.00 (Flange on HVL) 76

Indoor

Front View

90.00 2286

or91.502324

(See Note 2)

38.00965

22.00559

34.00864

2.0051

Floor Plan

4.00102

6.001526.00

15254.501384

20.50521

CL

34.00864

2.0051

Top View

4.00102

6.001526.00

152




54.501384

20.50508

DANGERHIGH

VOLTAGE

DANGERHIGH

VOLTAGE

(See Notes 1, 3, 4)


(See Notes 1, 3, 4)

D1

D2

D1

Floor Plan

D1

D1

D2

H(See Note 1)

H(See Note 1)

26.00660

CL

55


POWER-DRY™ and POWER-CAST® TransformersMetal-Clad Switchgear Secondary Connection (3 wire secondary only-see note 2)

5 kV

Approx. Weights (less breakers): 2200lbs./999kg indoor 2700lbs./1226kg outdoor 1200 A breaker: 360lbs./163kg 2000 A breaker: 410lbs./186kg 3000 A breaker: 480lbs./218kg

Notes :1. Please contact the manufacturing location for transformer dimensions. Standard dimensions are not available for transformers with 5 kV class secondaries.


3. Units will be rear-aligned when units have the depths shown. For transformers with larger depths, transformers will protrude in rear.

54.001372

(Power-Cast)or

60.001524Min.


109.102771

39.00991

(Fixed)(Power-Cast)

or45.001143

(Fixed)(Power-Dry)

54.001372

(Power-Cast)or

60.001524Min.


CL

Top View

Front View

36.00914

3.0076

(Flange)

108.502756

3.0076

(Flange)

Outdoor

94.002388Min.

(See Note 1)

20.00508

20.00508

8.00203

Floor Plan

6.30160

96.932462

1.7043

.10 3

8.00203

CL

5.90150

39.00991

(Power-Cast)or

45.001143

(Power-Dry)

36.93938

(Fixed)(Power-Dry)

or42.931090

(Fixed)(Power-Cast)

Indoor

18.00457

9.00229

Front View

3.5089

9.00229

9.00229

8.00203

1.0025

92.002337

(With Door)

95.002413

36.00914

54.001372Min.

(See Note 1)

94.002388Min.

(See Note 1)

39.00991

2.0051

1.7544

8.00203

1.0025

CL

18.00457

9.00229

Floor Plan

3.5089

9.00229

9.00229

1.0025

91.002311

54.001372Min.

(See Note 1) 39.00991

2.0051

.205

8.00203

2.5064

3.5089

CL

Top View

38.00965

(Fixed)

37.00940

(Fixed)

(See Note 3)

(See Note 3) (See Note 3)

(See Note 3)

Roof Overhang

56


Liquid-Filled Transformer – Metal-Clad Switchgear Secondary Connection (3 wire secondary only-see note 2) To 3750 kVA (see note 3)

Approx. Weights (less breakers): 2200lbs./999kg indoor 2700lbs./1226kg outdoor1200 A breaker: 360lbs./163kg 2000 A breaker: 410lbs./186kg 3000 A breaker: 480lbs./218kg

Notes :1. Please contact the manufacturing location for transformer dimensions. Standard dimensions are not available for transformers with 5 kV secondaries.2. If transformer is over 3750 kVA, variations to the dimensions shown here will be necessary.3. Please contact the manufacturing location for 4-wire secondaries.4. Units are not necessarily front or rear aligned. Transformer radiators may extend behind switchgear.

109.102771

49.181249

CL

Top View

Front View

36.00914

22.00559

108.502756

OutdoorIndoor

18.00457 9.00

229

Top View

Front View

3.5089

9.00229

9.00229

1.0025

92.002337

(With Door)

95.002413

36.00914

22.00559

3.00 (Flange - on Metal-Clad) 76

46.0011682.00

51

2.5064

2.5063

5.90150

1.7544

8.00203

8.00203

CL

18.00457

9.00229

Floor Plan

3.5089

9.00229

9.00229

1.0025

91.002311

2.0051

45.001143

.205

8.00203

CL

H(See Note 1)

(See Note 1)

D1

D2

(See Note 1)

D1

(See Note 1)

D1

(See Note 1)

D1

D2

49.181249

3.0076

(Flange-on Metal-Clad)

H(See Note 1)

20.005088.00

203

Floor Plan

6.30160

96.932462

20.00508

1.7043

.10 3

8.00203

CL

1.0025

Radiators May ExtendBehind Switchgear.

(See Note 4)Radiators May Extend

Behind Switchgear.(See Note 4)

5 kV

57


POWER-DRY™, POWER-CAST®, UNI-CAST™ Transformers – QED Switchboard to 4000 ASecondary Connection

600 V

54.00 1372Min.

(See Note 1) 36.00914

54.001372Min.

(See Note 3)

36.00914

94.002388Min.

(See Note 1)

91.502324

W(See Note 3)

54.00 1372

(See Note 1)

54.001372Min.

(See Note 3)

36.00914

36.00914

(See Note 2)

(See Note 2)

69.031753Min.

(See Note 3)

42.031068

54.001372


60.001524Min.


54.001372


60.001524Min.


CL

CL

CT

94.002388Min.

(See Note 1)

91.502324

W(See Note 3)

3.0076

65.501664Min.

(See Note 3)

41.001041

CL

CL

CT

OutdoorIndoor

Front View

Front View

Floor Plan

Floor Plan

Top View

Top View

(See Note 2)

(See Note 2)

Weight varies according to switchboard componentsand enclosure construction.

Notes:1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. See

TRANSFORMER section for a complete table of transformer dimensions.

2. Indoor units are front-aligned, outdoor units are not necessarily front or rear-aligned.Please see table for the value of distance CT on outdoor units.

3. Please consult QED layout manual or Q2C product selector for conduit area dimensionsand cabinet width. Outdoor enclosures are shown with rear covers; add 1.5" to theoutdoor floor-plan depth and 2" to the outdoor top view depth for rear doors. Units withQED-3 or a QED-4 secondaries may require a transition section – please contact themanufacturing location for details.

Distance CT

POWER-DRY Transformer POWER-CAST/UNI-CAST Transformer

CT = 39" Cabinet DepthCT = +9"2

58


POWER-DRY™, POWER-CAST®, UNI-CAST™ Transformers – QED Switchboard 4001-5000 ASecondary Connection

600 V

60.001524Min.

(See Note 1)37.50

952

60.001524Min.

(See Note 3)

37.50952

100.002540Min.

(See Note 1)

91.50 2324

W(See Note 3)

60.001524Min.

(See Note 1)

60.001524Min.

(See Note 3)

37.50953

37.50953

(See Note 2)

75.031906Min.

(See Note 3)

42.031068

60.001524Min.

(See Note 2)

60.001524Min.

(See Note 1)

CLCL

CL

100.002540Min.

(See Note 1)

91.502324

3.0076

71.501816Min.

(See Note 3)

41.001041

CL

(See Note 2)

(See Note 2)

(See Note 2)

OutdoorIndoor


Floor Plan Floor Plan

Top ViewTop View

W(See Note 3)

CT

CT

Weight varies according to switchboard components and enclosure construction.

Notes:1. Transformer dimensions vary depending upon kVA, BIL and temperature rise ratings. See

the TRANSFORMER section for a complete table of transformer dimensions (minimumdepth is 60").

2. Indoor units are front-aligned, indoor units are not necessarily front or rear-aligned.Please see table above for the value of distance CT on outdoor units.

3. Please consult QED layout manual or Q2C product selector for conduit area dimensionsand cabinet width. Outdoor enclosures are shown with rear covers; add 1.5" to theoutdoor floor-plan depth and 2" to the outdoor top view depth for rear doors. Units withQED3 or QED-4 distribution sections may require a transition section – please contactmanufacturing location for details.

Distance CT

POWER-DRY Transformer POWER-CAST/UNI-CAST Transformer

CT = 39" Cabinet DepthCT = +10.5"2

59


Liquid Filled Transformer to 3750 kVA (see note 4) – QED Switchboard to 4000 ASecondary Connection

600 V




2. Units are not necessarily front- or rear-aligned.

3. Please consult QED layout manual or Q2C product selector for conduit area dimensions and cabinet width. Outdoor enclosures are shown with rear covers; add 1.5" to the outdoor floor-plandepth and 2" to the outdoor top view depth for rear doors. For units with QED-3 or QED-4 distribution sections, a transition section may be necessary – please contact the manufacturing loca-tion for details.

4. If transformer is over 3750 kVA, variations to the dimensions shown here may be necessary.

69.031753Min.

(See Note 3)

H(See Note 1)

Outdoor

Front View

Floor Plan

Top View

CL

CL

43.031093

65.501664Min.

(See Note 3)

42.001067

91.502324

W

(See Note 3)

Front View

(See Note 3)

54.001372Min.

(See Note 3)

H(See Note 1)

D1

D2

D1

D2

Indoor

Floor Plan

Top View

CL


D1

CL

31.00787

54.001372Min.

(See Note 3)

D131.00787

91.502324

W

12.00305

Throat Includedin Transformer

Dimensions

12.00305


Dimensions


60


Liquid-Filled Transformer to 3750 kVA (see note 4) – QED Switchboard 4001 A-5000 ASecondary Connection

600 V




2. Units are not necessarily front- or rear-aligned.

3. Please consult QED layout manual or Q2C product selector for conduit area dimensions and cabinet width. Outdoor enclosures are shown with rear covers; add 1.5" to the outdoor floor-plandepth and 2" to outdoor top view depth for rear doors. A transition section may be necessary – please contact the manufacturing location for details.

4. If transformer is over 3750 kVA, slight variations to the dimensions shown here may be necessary.

75.031906Min.

(See Note 3)

H(See Note 1)

Outdoor

Front View

Floor Plan

Top View

CL

CL

43.031093

71.501816Min.

(See Note 3)

42.001067

91.502324

W

(See Note 3)(See Note 3)

60.001524Min.

(See Note 3)

H(See Note 1)


D1

D1

D1

D1

Indoor

Front View

Floor Plan

Top View

CL

D1

CL

31.00787

60.001524Min.

(See Note 3)

31.00787

91.502324

W


D1

12.00305


Dimensions

12.00305


Dimensions

61


POWER-DRY™, POWER-CAST®, UNI-CAST™ Transformers – PZ III Drawout SwitchgearSecondary Connection

Weight varies according to switchboard components and enclosure construction.Notes:1. Outdoor units must be coordinated with POWER-ZONE® NEMA Type 3R walk-in or non-walk-in enclosures on a case-by-case basis. Please consult the Power-Zone Center group in Smyrna,

TN for details.

2. Transformer dimensions may vary depending upon kVA, BIL and temperature rise ratings. See TRANSFORMER section for a complete table of transformer dimensions. Transformers close-coupling to 4001 A-5000 A PZ III gear are 60" deep minimum. Power-Cast/Uni-Cast transformers close-coupling to 4001-5000 A PZ III gear will be a minimum of 100" in height.

3. Please consult the PZ III layout guide or Q2C product selector for conduit area dimensions and cabinet width and depth.

4. Larger offset values are for switchgear with DS-840 or DSL switchgear.

54.001372

or60.001524Min.

(See Note 2)

.5614or

8.56217

(See Note 4)

.5614or

8.56217

(See Note 4)

91.502324

W(See Note 3)

Indoor

Front View

Top View

54.001372

or60.001524Min.

(See Note 2)

Top View

94.002388Min.

(See Note 2)

6 Depths Available3 for DS Switchgear3 for DSL Switchgear

(See Note 3)

6 Depths Available3 for DS Switchgear3 for DSL Switchgear

(See Note 3)

Outdoor(See Note 1)

Front View

Top View

Floor Plan

CL

CL

600 V

62


Liquid Filled Transformer to 3750 kVA (see Note 5) – PZ III Drawout SwitchgearSecondary Connection

Weight varies according to switchgear components and enclosure construction.Notes:1. Outdoor units must be coordinated with POWER-ZONE® NEMA Type 3R walk-in or non-walk-in enclosures on a case-by-case basis. Please consult the Power-Zone Center group in Smyrna,

TN for details.

2. Liquid-filled transformer standard enclosure dimensions are given in the TRANSFORMER section. They are applicable only for mineral-oil units under certain conditions (see TRANSFORMERsection for details).

3. Please consult the PZ III layout guide or Q2C product selector for conduit area dimensions and cabinet width and depth.

4. Larger values shown are for switchgear with DS-840 or DSL switchgear.

5. For transformers over 3750 kVA, slight changes to the dimensions shown here may be necessary.

35.25895or

43.251099Min.

(See Note 4)

35.25895or

43.251099Min.

(See Note 4)

CL

(See Notes 2, 4, 5)

91.502324

12.50318 W

(See Note 3)

CL

Indoor

Front View

Floor Plan

Top View

D1

D2

D1

6 Depths Available3 for DS Switchgear

3 for DSL Switchgear(See Note 3)

(See Notes 2, 4, 5)

6 Depths Available3 for DS Switchgear

3 for DSL Switchgear(See Note 3)

CL

CL

Outdoor

Front View

Floor Plan

Top View

600 V

Order No. 6020CT9401 July 97 Printed in U.S.A. ©1997 Square D All Rights Reserved

POWER-CAST, POWER-STYLE, POWER-ZONE, VISI-VAC, SQUARE D ands are Registered Trademarks of Square D Company.POWER-DRY and UNI-CAST are Trademarks of Square D Company.

Documents

POWER-ZONE Load Center Unit Substationsstevenengineering.com/Tech_Support/PDFs/45PNBPZL.pdf · PZ III Low V oltage Drawout Switchgear . . . . . . . . . . . . . . . . . . 8 ... voltage