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Section 7

Section 7Standard Power/Vac® Construction Features,

Equipment and Installation Information

Contents

PageINTRODUCTION ........................................................................................ 7-2

STANDARD EQUIPMENT FEATURES...................................................... 7-2General................................................................................................. 7-2Documentation ..................................................................................... 7-2Service Conditions ............................................................................... 7-2

Seismic ............................................................................................ 7-2Construction ......................................................................................... 7-3

Standard Indoor Equipment .............................................................. 7-3Indoor Drip Proof Construction ......................................................... 7-3Standard Outdoor Equipment ........................................................... 7-3Protected-Aisle Construction ............................................................ 7-4Common-Aisle Construction ............................................................. 7-4

Hardware.............................................................................................. 7-4Breaker Compartment .......................................................................... 7-4Auxiliary Compartment .......................................................................... 7-5Transitions ............................................................................................ 7-5Safety Interlocks.................................................................................... 7-5Main Bus .............................................................................................. 7-6Secondary Control ................................................................................ 7-6

Door-mounted Devices .................................................................... 7-6Equipment-Mounted Devices ........................................................... 7-6Wiring .............................................................................................. 7-7

Power Termination Compartment .......................................................... 7-7Ground Bus .......................................................................................... 7-8Space Heaters...................................................................................... 7-8Finish and Paint .................................................................................... 7-8Unit Nameplates ................................................................................... 7-8

INSTALLATION INFORMATION .................................................................. 7-9Shipping Splits...................................................................................... 7-9Foundation Requirements ..................................................................... 7-9Weights and Dimensions ...................................................................... 7-10Standard Dimensional Sideviews ......................................................... 7-11Foundation Requirements and Anchoring Details .................................. 7-13Available Power Conductor Termination Space ..................................... 7-17Bus Extension/Throat to other Equipment .............................................. 7-20Top Hat VT/CPT Drawer ....................................................................... 7-23Typical Equipment Sideviews ............................................................... 7-24

Construction Features, Equipment and Installation Information

INTRODUCTION

This section of the Application Guide providesbasic construction information for Power/Vac vacuummetalclad switchgear; standard equipmentconstruction features, weights and dimensions, floorplan details, and installation details for floor or padinstallations.

Since Power/Vac is a highly structured design,one basic floor plan detail, with three sets ofdimensions, provides complete floor plan information,regardless of rating. Control and power conduitentrances remain in one specified location for all unitsin a lineup. In addition, anchor bolt locations are thesame for each unit. These benefits of product designstructuring simplify layout planning, sitedconstruction, and equipment installation.

STANDARD EQUIPMENT FEATURES

GENERAL

This specification describes standard Power/Vacvacuum metalclad switchgear with ratings listed inSections 1 and 3 of this guide.

DOCUMENTATION

Standard documentation provided consists of thefollowing computer-generated diagrams anddocuments:

• Device summary• Elementary diagram (power and control

circuits showing each contact, coil, wire andterminal point)

• Connection/Interconnection diagram (showsphysical location of devices, terminal blocksand internal wiring)

• Arrangement drawing (includes simple one-line diagram, front view, side views, and floorplan)

Standard documentation does not include specialdrawing formats, special nomenclature for terminalpoints, special location or sequencing of customerterminal points, or preparation of composite drawingsshowing equipment other than the switchgear andessential customer connections.

INDUSTRY STANDARDS

Power/Vac metalclad switchgear is designed, builtand tested in accordance with applicable ANSI, IEEEand NEMA standards as listed in Section 1 of thisguide.

SERVICE CONDITIONS

Power/Vac metalclad switchgear assemblies aresuitable for operation at their standard nameplateratings (See ANSI-C37.20.2):

• Where continuous ambient temperature is notabove 40°C or below -30°C (104°F and -22°F)

• Where the altitude is not above 1000 meters(3300 feet)

• Where the effect of solar radiation is notsignificant

SEISMIC INSTALLATIONS

Power/Vac Medium Voltage Switchgear has beenqualified to the seismic requirements of IBC-2003 andIEEE-693-1997 through shake table testing. Severalsamples representative of the most seismicallyvulnerable product configurations were tested to certifythe entire product line. Equipment remainedstructurally sound and devices functioned properlyduring and after the seismic event.

Power/Vac Medium Voltage Switchgear is certified tothe following IBC-2003 levels:

Ip = 1.5Sds = 1.77 g at z/h = 0Sds = 1.1 at z/h > 0

Power/Vac Medium Voltage Switchgear is certified tothe following IEEE-693-1997 levels:

Moderate with 2.5 amplification factor, and Highwith 1.4 amplification factor

IBC-2003 and IEEE-693-1997 do not use seismicZones to specify performance levels as UBC and CBCdo. IBC-2003 requirements are specified using threekey variables:

Sds - A measure of equipment base acceleration.Sds values range from 0 to 2.0 and are multiplesof g-force.

Ip - An importance factor. Ip levels range from 1.0to 1.5. All GE equipment with IBC-2003certification is qualified to an Ip level of 1.5,indicating the equipment will be fully functionalduring and after a seismic event.

z/h - A measure of the equipment mountinglocation inside or outside a building. Z/h rangesfrom 0 to 1, where h is the total building heightand z is the vertical distance between ground leveland the equipment installation location. Groundand roof mounted equipment, for example, wouldhave z/h levels of 0 and 1, respectively.

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Section 7

Equipment is certified to the IBC-2003 levels listedabove for all Seismic Use Groups, OccupancyImportance Factors, and Seismic DesignCategories.

IEEE-693-1997 uses two performance levels:Moderate and High. Recent IEEE-693-1997certifications also carry an amplification factoranalogous to the z/h value of IBC-2003 to specify theinstallation level within a building. Amplification factorsof 1 and 2.5 correspond to equipment mounting atground and roof levels, respectively.

Further information regarding the POWER/VACMedium Voltage Switchgear seismic certification canbe found in the GE seismic certification brochure, GEdocument DET-464.

CONSTRUCTION

INDOOR EQUIPMENT

Indoor Power/Vac switchgear consists of one ormore vertical sections mounted side by side, andconnected electrically and mechanically to form acomplete lineup of equipment.

Each vertical section is a self-supporting structureincluding a formed steel frame, bolted together (withreinforcing gussets) to which 11 gauge steel frontdoors, top, side and rear covers are assembled. (orequivalent thickness if covers consist of two sheets).A vertical section will accommodate a maximum oftwo circuit breakers or four VT/CPT fuse rollout trays,or certain combinations thereof (see Section 1,Section 6 Figures 6-15 and 6-16).

Breakers are removable from the equipment by meansof a portable lifting device (lift truck). An optional lowercompartment roll-in breaker design is available onIndoor or Outdoor Protected-Aisle construction. As abreaker is removed, grounded metal safety shuttersisolate the primary contacts from the rest of thecompartment and are fronted by a glastic safetybarrier.

Grounded metal barriers isolate the primarycompartments of each circuit. Primary compartmentsinclude the breaker compartment, main buscompartment, power termination compartment, andauxiliary compartment. In addition, each breaker androllout tray is furnished with an 11 gauge steel frontplate that isolates the secondary control from theprimary compartment. Secondary control circuit wireswill be armored where they pass through primarycompartments.

Power termination compartments are located atthe rear of the equipment, accessible through boltedcovers equipped with lifting handles. Hinged rearcovers are an option as well as padlock provisions.Barriers and a cable pass-through box are furnishedto isolate the two separate termination compartmentsin 2-high vertical sections, to maintain ANSI Metalcladstandards.

Two front doors (upper and lower) are mountedon each vertical section utilizing full-length hinges,doorstops, and two hex-knob closing screws. T-handletype door latching as well as padlock provisions areoptional. Each breaker door will typically contain onlythose control, instrumentation and protection devicesassociated with the breaker in that compartment.Fuse blocks, terminal blocks and other surface-mounted accessories will be mounted in locationsdedicated for that purpose within the associatedbreaker compartment.

Required ventilation is provided by air intakethrough slots in the bottom flange of each front doorand louvers in the rear covers. Exhaust is through“basket weave” openings in the top covers (not usedfor power control cable entry). Top cover exhaust ventsare equipped with dust guards to keep dirt fromentering the top of the switchgear.

Indoor Drip Proof Construction

Indoor drip proof construction is used to preventdripping liquids from entering the top of the switchgear,such as from overhead pipes or sprinkler systems. Ithas the same design as the standard indoorconstruction, but with the addition of our standardsloped outdoor roof. Door gasketing can be added,to provide construction similar to that described asNEMA 12 in the NEMA 250 Standard. See Figure 7-2.

OUTDOOR EQUIPMENT

Outdoor construction begins with basic indoorequipment and is weatherproofed by gasketing andsealing the end covers and rear covers, adding filtersto ventilation louvers and adding a sloped weatherproofroof. In addition, weatherproof doors or a maintenanceaisle are added to the front. A three-inch box frame isprovided under each vertical section and the equipmentis painted and undercoated for outdoor service.

Airflow for convection cooling is assisted by theaddition of standard equipment strip heaters withguards. Each heater is rated 300W at 240VAC, butapplied at half voltage for long life which provide 75watts for each heater equipment. Four heaters are

7-3


mounted in each section, for a total of 300 watts pervertical section. These should remain energized atall times (no switch or thermostat is provided unlessspecified) to guard against internal condensation whenwide ambient temperature excursions occur.

Standard Outdoor (non walk-in) Construction -For standard outdoor construction, full-height,gasketed, padlockable doors are provided on the frontof the basic weatherproofed equipment to protect thedevice doors. Grounded 120-volt convenience outletsare provided on each lower device door. In addition, alight socket and switch (120-volt, 100-watt) for anincandescent lamp is mounted on the inside of eachunit. See Figure 7-3.

Protected-Aisle (walk-in) Construction - A 75" deepweatherproof aisle of 11-gauge steel is added to thefront of basic weatherproofed equipment to provide“protected-aisle” convenience. Doors with padlocksand panic latches are located at each end of the aisle.Space (36") is required at the left end of the lineup toallow for device door swing of the left-end units. Thisspace can be either a full 36" wide “blank section”used for a work area, batteries and battery charger,or for equipment storage, or can be an extension ofthe aisle alone. On the right end of the lineup, aminimum 12" aisle extension is typically required forclearance to operate the breaker lift truck. The aisleis shipped “knocked down” for job site assembly.Factory preassembly of aisle sections is an option.See Figure 7-4 and 7-29.

Inlet ventilation openings for the aisle are louvered,equipped with filters, and located on the aisle doors.Exhaust is through screened openings designed intothe roof perimeter overhang. Note that the protectedaisle cannot be furnished with HVAC systems orinsulated; though roof mounted ventilation fans canbe provided. For projects requiring a controlledenvironment for the switchgear installation, due totemperature extremes, corrosive atmospheres or otherharsh conditions, a Power Control Room should beconsidered.

A grounding-type receptacle, rated 250 volts ac,20 amperes, is provided at each end of the aisle forportable comfort heaters. (Comfort heaters to befurnished by Purchaser.) A 120-volt grounding, duplexconvenience outlet and a three-way switch for ceilinglights are also provided at each end of the aisle.Ceiling-mounted light sockets for 120-volt, 100-watt,incandescent bulbs are furnished (one per verticalsection).

Common-Aisle Construction - To provide common-aisle construction, the space between facing lineupsof weatherproofed gear is spanned; by a “common”weatherproof aisle. Space (36") is provided at the leftend of each lineup to allow for device-door swing.Otherwise, all construction details are the same asthose for protected-aisle construction. See Figure 7-5.

HARDWARE

All standard assembly hardware is high tensile-strength steel (SAE grade 5), which is plated to resistcorrosion. On outdoor construction, exposedhardware is stainless steel.

BREAKER COMPARTMENT

Each Power/Vac circuit breaker rolls on horizontalguide rails and has self-coupling primary andsecondary contacts. The breaker is continuouslygrounded while in the compartment, via a breakermounted copper ground bar and a ground shoe locatedin the compartment. A manually operated jackscrewracking mechanism is provided in each breakercompartment to move the breaker between the“connected” and “test/disconnected” positions. Theequipment is of closed-door-drawout design, to allowthe breaker to be racked between positions with thefront door closed for safety. Breaker position indicatoris viewable from the front with the compartment doorclosed and latched. An optional motor driven, remoteracking operator is available for racking the breakerin and out of the cubicle. This device can be used toprovide enhanced operator Arc Flash Safety asdescribed in NFPA 70E-2004.

Grounded-metal safety shutters, mechanicallylinked to the racking mechanism are actuated to coverthe stationary primary disconnects when the breakeris moved from the connected position.

7-4

Remote Racking Device

Section 7

The standard racking mechanism provides twopositions with up to 3 padlocks each (padlocks witha 3/8-inch shackle are recommended). The frontposition keeps the breaker from closing in the “Test”and “Connect” position. This gives the sameinterlocking functions as the optional key lockdescribed below, and but does not block the motionof the racking mechanism. The second position forpadlocks will prevent any motion of the rackingmechanism by blocking access to the hexagonalracking shaft.

The breaker racking mechanism track also has aprovision for an optional key lock. The purpose of thislock is to keep the breaker from closing in the “Test”and “Connect” positions by operating the negativeinterlock and prevents the breaker from closing. Thekey lock does not prevent motion of the rackingmechanism. A special racking mechanism track isavailable, that when used with the keylock, will lockthe mechanism, blocking racking. See Power/VacInstruction Book GEK-39672 for more details.

An optional stationary (breaker cell mounted)auxiliary switch (52STA or MOC = mechanismoperated contact) is available in a 3-stage (3 “a” and3 “b”), a 6-stage (6 “a” and 6 “b”), or a 10-stage (10 “a”and 10 “b”) configuration. This switch changes statewith the breaker opening and closing, and normallywill operate with the breaker in either the “Connect”or “Test/Disconnect” positions. It may also besupplied to operate with the breaker in only the“Connect” or “Test” positions.

An optional breaker cell mounted position switch(52POS or TOC = truck operated contact) is alsoavailable in a 3-stage (3 “a” and 3 “b”), or a 6-stage (6“a” and 6 “b”) configuration. This switch changes stateas the breaker is moved between the “Connected”and “Test/Disconnected” positions. Note switchcontacts are not convertible.

AUXILIARY COMPARTMENT

Rollout trays are provided in primary auxiliarycompartments for mounting voltage transformers(VT’s), control power transformers (CPT’s) or CPTfuses. Two rollout trays can be accommodated inthe bottom primary auxiliary compartment and two inthe top compartment. See Section 1, Figure 1-5 andSection 6, Figure 6-16.

Optional ‘top hats’ or “superstructures” are offeredfor VT’s or CPT’s in areas with restricted space. SeeFigure 7-20. Auxiliary compartments can also beutilized to mount control power distribution or transferpanels, exciter equipment for motor starterapplications, or as a storage compartment for a sparebreaker or ground & test device.

TRANSITIONS

Transition sections between Power/Vac andmotor control equipment, switch and fuse,transformers, or other equipments are to be furnishedby the vendor of the connecting equipment. Power/Vac has standard bus coordination details anddrawings. See Figures 7-17 thru 7-19. The mainswitchgear bus is extended out the side 10 inches,and the side sheet is provided with standard drillingpattern to allow the mating equipment to bolt up tothe Power/Vac switchgear.

The standard transition section furnished by GEMebane, for Limitamp motor control equipment, is 22inches in width. It is full height and full depth, matchingup to the Power/Vac on one side and the Limitampmotor control on the other side. See Figure 7-17.

Transition to a transformer is very similar. Thetransformer vendor provides the transition section, andthe Power/Vac provides a 6" throat welded to theswitchgear end sheet, which then can be bolted tothe transformer transition section. See Figure 7-18and 7-19.

Power/Vac also offers standard transitionsdesigned for connection to existing indoor GEMagneblast Switchgear. Transitions are typically 24"or 36" wide, either “throat type” or full height/depthunits. Contact GE Sales for additional details.

SAFETY INTERLOCKS

Power/Vac switchgear is provided withmechanical interlocks to:

• Inhibit moving the breaker to or from the“Connected” position when the breakercontacts are in the “closed” position;

• Block closing the breaker, unless the primarydisconnects are fully engaged or the breakeris in the “Test/Disconnect” position.

7-5

52 STA, 52POS and Ground Shoe in Breaker Cell

52 POS

Ground Shoe52 STA


• Automatically discharge the closing springswhen the breaker is moved between the“Connected” and “Test” positions or when it isinserted into or withdrawn from thecompartment.

In addition, the breaker racking mechanism isa jackscrew type, which positively holds thebreaker when it is in either the “Connected” or“Test/Disconnected” position. Finally, controlpower transformer primary fuses, whetherlocated on the CPT or on the separate rollouttrays, are not accessible unless the CPTprimary and secondary circuits are open.

Additional safety design features include:

• The rating interference plate, which allows onlya breaker of the correct type and rating to beinserted into any specific breaker compartment.

• Closed-door drawout design, which allowsbreaker racking to and from the “Connected”position with the front door closed.

• Grounded metal shutters which automaticallyclose to cover the stationary primarydisconnects when the breaker is moved fromthe “Connected” position.

• An additional insulated safety barrier is installedin front of the metal shutters.

MAIN BUS

The main bus is completely enclosed by grounded,metal barriers and feeds both the upper and lowercompartment in a vertical section. Main bus materialsare copper ASTM B187 for 1200-ampere rating (3/16-inch by 6-inch bar) and 2000-ampere rating (3/8-inchx 6-inch bar), and ASTM B187 Type ETP copper forthe 3000 ampere rating (2 - 0.38" x 6.0" bars) and3500 and 4000 ampere ratings have (2 - 0.625" x 6.0"bars). All main bus joints are tin plated (silver platingis an option) and utilize at least two ½-inch Grade 5plated steel bolts per joint. The option of othermaterials for bus hardware is not offered. Provisionfor future extension of the main bus is standard.

Bus bars are mounted edgewise and are insulatedwith flame retardant, track-resistant epoxy applied bythe fluid-dip process to a thickness that withstandsthe dielectric tests specified in ANSI-C37.20.2. Thebus bars are supported on track-resistant, molded-polyester-glass supports, which also serve as inter-section bus barriers. Bus supports have strengthsuitable to withstand the forces caused by a 50kARMS symmetrical short-circuit (80kA RMS

asymmetrical, 130kA Peak). Enhanced bus bracingfor 63kA symmetrical short-circuit is also available.All main bus joints are insulated with pre-formed vinylboots secured by nylon hardware as a standardpractice. Some custom bus joints may require taping.

Porcelain insulation to ground is optional. Thisincludes porcelain inserts in the bus-support barriers,porcelain standoff insulators where required, andporcelain sleeves for the stationary primarydisconnects. Note porcelain standoff insulators areused as standard for runback support.

SECONDARY CONTROL

Door-mounted Devices

Protection, instrumentation, and control devices,which provide indication or manual control, aremounted on the enclosure front doors. Typical door-mounted devices include protective and relays, meters,instruments, control switches indicating lights, andtest blocks.

The devices required for a particular breaker aretypically mounted on the compartment doorassociated with that breaker. For cases in which alldevices cannot be accommodated on the breakercompartment door, the additional devices can bemounted on an auxiliary compartment door of anadjacent vertical section.

Equipment-mounted Devices

Secondary control devices, which are not door-mounted, are surface-mounted in suitable locationsinside the compartment. Included in this class arefuse blocks, terminal blocks, most auxiliary relays,and timers. All control circuits are properly protectedusing fuses in dead front, draw-out or tilt-out blocks.

Ring-type current transformers are mounted overthe stationary primary disconnect bushings and areaccessible through the front of the breakercompartment. A maximum of four (4) CTs withstandard accuracy class can be mounted per phase.If CTs are optional high accuracy class, only two (2)can be mounted per phase. Wound primary CT’s(bar type) when required, are mounted in the powertermination compartment. See Section 5, Table 5-2for typical ring type CT ratios.

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Section 7

Voltage transformers, and their associated fuses,are mounted on rollout trays. Standard voltagetransformers are GE/ITI type PTG-3 and PTG-5,mounted three per tray for wye connectiontransformers and two per tray for open-delta connectedtransformers.

Control power transformers are GE/ITI epoxy-cast,dry-type transformers. A rollout tray can accommodateone single-phase control power transformer, up to 15-kVA maximum. Larger control power transformersmust be stationary-mounted in the power terminationcompartment and only the fuses are mounted in therollout tray. A secondary non-automatic MCB isprovided, key interlocked with the primary fuse tray,to prevent withdrawing the fuses under load.Transformer size in the rear termination compartmentis limited to one 75 KVA single-phase transformer ora 75 KVA three-phase bank using three individual 25KVA transformers (see Sections 1 and 6).

Wiring

Secondary control wiring is No. 14 extra flexible,41 strand, tinned-copper control wire, Type SIS(Vulkene), rated 600 volts, except for some specificcircuits for which a larger wire size is required. Crimp-type, uninsulated spade terminals and sleeve typewire markers are furnished on all wire ends, exceptwhere non-insulated ring terminals are used to connectCT circuit connections. Secondary control wires arearmored or enclosed in grounded metal troughs wherethey pass through primary compartments.

POWER TERMINATION COMPARTMENT

Cable termination compartments for incoming andload cables are located at the rear of the equipmentand are accessible through rear covers. Barriers andcable pass-through boxes of 11-gauge steel areprovided to isolate the circuit terminations in the eventthere are two cable termination compartments in thesame vertical section. Each cable termination padcan accommodate up to two 750 KCMIL cables perphase as standard. With the addition of optionaladapters, or a rear depth extension, variouscombinations can be accommodated up to ten1000KCMIL cables per phase maximum.

Standard Power/Vac switchgear includes only NEMA2-hole drilling for terminations. Terminal lugs are notincluded. Connections to roof entrance bushings(REB), pothead terminations, non-seg bus duct orcable bus are also available.

As required, the power-termination compartmentmay be used for mounting stationary CPT’s, wound-primary CT’s, ground-sensor CT’s, GE standard surgesuppressors, surge arrestors, and other auxiliarydevices.

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Typical CTs mounted in Power/Vac® breaker cell

Typical VT Drawout tray

Cable adapter bars for up to 10 cables per phase


Additional options include:• Rear cover mounted infrared sightglasses• Hinged Rear Covers• Padlock Provisions• Grounding studs• Glow tubes for voltage indication

GROUND BUS

The standard ground bus is 0.25-inch by 2-inchbare copper, and has a short-circuit rating of 50 kAsymmetrical for 2 seconds. For 63kA short circuitapplications, the ground bus is 0.40-inch by 2-inchcopper to achieve a 63 kA symmetrical 2 secondrating.

The ground bus extends throughout the lineupwith connections to each breaker grounding contactand each cable compartment ground terminal. Alljoints are made with at least two 3/8-inch, plated steelbolts per joint. Station ground connection points arelocated in each end section.

EQUIPMENT HEATERS

Indoor equipment does not include equipmentheaters and thermostats as a standard offering. Theymay be supplied as an option. Each heater is rated300W at 240VAC, but applied at half voltage for longlife which provide 75 watts for each heater element.Four heaters are mounted in each section, 2 frontand 2 rear, for a total of 300 watts per vertical section.

On outdoor designs, heaters are supplied asstandard to minimize moisture condensation. Heatersare applied at half-voltage for extended life and areprotected by perforated metal guards to preventinadvertent contact with the heater element. Heatersshould be energized at all times to guard againstcondensation caused by wide ambient temperatureexcursions; accordingly, no switch or thermostat istypically provided in the heater circuit.

FINISH AND PAINT

Switchgear enclosure parts are protected afterpretreatment of the metal, with an electrostaticallyapplied, baked on, polyester powdercoat of Light GrayANSI 61.• Dry Film Thickness- Between 2.0-4.0 MILS• Pencil Hardness of 2H, per ASTM D3363• 230 in-lbs reverse impact per STM D2794• 160 in-lbs direct impact resistance

Other exterior colors such as Dark Gray (ANSI24), Sky Gray (ANSI 70) or Berkshire Medium Green(ANSI 45) are optional.

UNIT NAMEPLATES

Provided on each unit door is a 4" X 1" laminatedplastic engraved nameplate. Either black on white orwhite on black will be furnished, as specified (whiteon black if not specified by Purchaser), with thedesignated customer unit name engraved on thenameplate in 3/6-inch letters, two lines and sixteenletters per line, maximum. A blank nameplate will beprovided if unit designations are not specified. Deviceand component nameplates are optional.

ACCESSORIES

Remote Racking Operator – This is an optionalmotor-driven racking tool, which can be used to movethe circuit breaker between disconnect and connectedposition, in lieu of the standard hand operated crank.The device attaches to the front of the closed breakercompartment door, and is controlled by a hand-heldstation on the end of a 30 foot cord. Devices areavailable for either 120VAC or 240VAC supply. Twomodels are offered: Type 0177D8399 offers a quickconnect/disconnect door attachment design, and isused for closed door racking of circuit breakers only;Type 0144D2856 uses door studs and a clampingmechanism which allows use for racking circuitbreakers and Ground & Test Devices with thecompartment door open, and breakers with the doorclosed.

Breaker Test Cabinet – A Test Cabinet is used toelectrically operate the Power/Vac breaker when outof the breaker cell, typically at a test or repair bench.It provides a convenient means to access the breakertrip and close circuits during maintenance andinspection procedures. The Test Cabinet containstrip and close pushbuttons, on-off switch, controlpower fuses and a 10 foot secondary coupler forconnection to the Power/Vac breaker.

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Remote Racking Device

Section 7

Breaker Test Coupler – For operating Power/Vacbreakers removed from the breaker cell, but using thelocal switchgear controls, the Breaker Test Coupleris available. The Test Coupler has a 20 foot cord thatis used to connect the breaker secondary disconnectblock of a breaker removed from the compartment, tothe mating block in the breaker cell. This allows forthe use of the internal switchgear control power andlocal breaker controls to test or operate the breakeroutside of the breaker cell.

Ground and Test Devices – GE offers both manuallyoperated and electrically operated Grounding andTesting Devices for use in Power/Vac switchgear. SeeSection 8 for complete descriptions.

INSTALLATION INFORMATION

Detailed installation and assembly information forPower/Vac switchgear equipment is provided in GEInstruction Book GEK-39672. Typical estimatingweights and dimensions are given in Table 7-1.Figures 7-1 thru 7-5 provide typical equipmentenvelopes for layout and planning. Figures 7- 6 thru7-8 provide floor plan details showing anchor boltlocations.

7-9

Typical equipment anchoring details are provided inFigures 7-9 thru 7-13. Power conductor and secondaryconduit entrance locations are found in Figures 7-14thru 7-16.

SHIPPING SPLITS

Most metalclad switchgear lineups require manyvertical sections, or stacks. These multi-sectionlineups are broken down into shipping splits of fourstacks or less after the lineup is assembled and testedat the factory. For confined spaces at jobsite,individual stack shipping sections are available, butmust be specified prior to engineering. Each shippingsection is bolted to wooden skids, which can bemoved with a fork truck. A four stack shipping sectionwill be approximately 14 feet long, 8 feet high and 9feet deep, weighing 16,000 pounds. These shippingsections must be reassembled, in the correct order,when received at the job site.

POWER/VAC® SWITCHGEAR INDOORFOUNDATION PREPARATION

For optimum performance of Power/Vacswitchgear equipment, the foundation requirementsexpressed in the Installation and Maintenance Manual,GEK 39672, and in the installation drawing furnishedwith the equipment should be strictly followed.

Power/Vac switchgear can be mounted directly on aflat level floor, however imbedded steel floor channelsare recommended for supporting the equipment. Theuse of steel floor channels is at the option of thePurchaser, and must be furnished by the Purchaser.The channel sills should be installed in accordancewith the Installation and Maintenance Manual, GEK39672, and in the installation drawings furnished withthe equipment. Switchgear is anchored to the flooror channels with a minimum of 1/2 inch Grade 5 boltsat the specified locations. Plug welding can also beutilized at the same locations if desired. See Figure7-9.

The foundation must be strong enough to preventsagging due to the weight of the switchgear structureand to withstand the shock stress caused by theopening of the breakers under fault conditions. Theshock loading is approximately 1-1/2 times the staticload. The finished floor must extend 78 inches beyondthe front of the equipment, to provide operatingclearance for the breaker lift truck. If a housekeepingpad is utilized, the pad must extend no more than 3inches beyond the front of the switchgear, and be nomore than 7 inches tall to allow the use of the breakerlift truck. The finished floor beyond the pad must bethe same as noted above.

Breaker Test Cabinet

Power/Vac® Test Coupler


Current Rating (Amps)

Breaker Weights

(lbs)

Height (in)

Depth (in) (1)

Width (in)Weight

(lbs)Width (in)

Weight (lbs)

Height (in)

Depth (in) Width (in)Weight

(lbs)Width (in)

Weight (lbs)

Depth (in)Weight

(lbs)

Roll-out Weight (W/VT-CPT)

Front Aisle (min)

Rear aisle (min)

1200 550 3050 2950 3550 34502000 650 3100 3000 3600 35003000 780 3180 3080 3680 35803500 850 3280 3180 3780 36804000 860 3300 3200 3800 3700

Auxiliary Vertical Section

For Protected Aisle, Add to Each Vertical

Section (2)

Outdoor EquipmentEquipment Rating

4.76KV, 8.25KV & 15KV

Indoor Equipment

2-High Breaker Vertical Section (less breakers)

Auxiliary Vertical Section

Indoor & Outdoor

Front & Rear Clearances

95 (6) 36 36 75 500 78 (3) 26 (5)

2-High Breaker Vertical Section (less breakers)

106

94110036 36

111 O/D 112 P/A or C/A

109 O/D 181 P/A 272 C/A

Table 7-1 Power/Vac® Estimating Weights and Dimensions

(1) An optional 82" depth may be available for some indoor applications. Consult Factory.(2) For Common Aisle (C/A) construction, add 1500 lbs to weight of 2 indoor vertical sections.(3) Reduced minimum front aisle space of 58" is available on indoor construction or outdoor aisle type construction,

with the use of bottom roll-in breakers only (1-high).(4) Weights listed are for estimating purposes only, and should not be used for foundation construction.(5) If hinged rear covers are supplied, rear aisle space must be 35" minimum. Consult NFPA 70 (NEC) for necessary

safety clearances which may be greater.(6) Height over cooling fans on 4000A breaker units is 106".

7-10

For Seismic installations, steel floor channels arerequired (furnished by the Purchaser), and theanchoring options as detailed in the furnished SeismicInstallation Drawings must be followed.

The foundation must be flat and level in all planes,perpendicular on both axes to within 0.25 in. in 10 ft.span. We must be concerned with how much thepad is out of level and to what degree this varies overthe installation. A foundation pad that is not flat andlevel can result in problems with breaker alignmentand the racking mechanism operation as well asplacing unusual stresses on insulators and supportingstructures. Minor adjustments can be corrected with

shims. When used, shims should be placed beneathall vertical frame posts (located 33 or 36 inches fromthe front of the equipment, and runback support posts.The acceptance of the pad and the use of shims isthe customer’s responsibility

FLAT—Surface of pad must lie between two parallel,level planes spaced 1/8 in. apart.

LEVEL—Planes must be perpendicular to plumb line

Section 7

PVBreaker

PVBreaker

97" 3"

6"

97"

111"

PVBreaker

PVBreaker

94"

6"

95"

108"

Figure 7-1Indoor

Construction

Figure 7-2Indoor Drip Proof

Construction

Figure 7-3Outdoor Non-Walkin

Construction

7-11

PVBreaker

PVBreaker

94"

95"


PVBreaker

PVBreaker

3"

6"

97"112"

181"

75"Aisle

94"

PVBreaker

PVBreaker

3"

6"

97"112"

272"

75"Aisle 94"

PVBreaker

PVBreaker

94"

Figure 7-5 Outdoor Common Aisle Construction

7-12

Figure 7-4 Outdoor Protected Aisle Construction

Section 7

Fro

nt

of

Eq

uip

men

t

Sta

nd

ard

Ind

oo

r A

nch

ori

ng

C L

10.0

10.0

2.12

10.0

10.0

2.12

Typ

ical

of (

4) .7

5 di

a ho

les

for

.50

anch

or

bolts

Min

imum

R

ight

Han

d S

ide

Ais

leS

pace

is

18.0

Min

imum

Le

ft H

and

Sid

e A

isle

Spa

ce is

36

.0

Min

imum

R

ear

Ais

leS

pace

is 3

5.0

Min

imum

F

ront

Ais

leS

pace

is 7

8.0

Fro

nt

of

Eq

uip

men

t

Ro

ll-in

Bre

aker

Ind

oo

r A

nch

ori

ng

C L

10.0

10.0

2.12

10.0

10.0

5.0

Typ

ical

of (

4) .7

5 di

a ho

les

for

.50

anch

or b

olts

Min

imum

R

ight

Han

d S

ide

Ais

leS

pace

is

18.0

Min

imum

Le

ft H

and

Sid

e A

isle

Spa

ce is

36

.0

Min

imum

R

ear

Ais

leS

pace

is 3

5.0

Min

imum

F

ront

Ais

leS

pace

is 4

8.0*

*

** A

uxili

ary

com

part

men

ts

cont

aini

ng d

raw

out P

T/C

PT

tray

s m

ay r

equi

re u

se o

f lift

truc

k fo

r co

mpl

ete

rem

oval

from

equ

ipm

ent.

Lift

truc

k re

quire

s 78

.0"

fron

t ais

le.

Fro

nt

of

Eq

uip

men

tW

eath

erp

roo

f D

oo

r

Sta

nd

ard

Ou

tdo

or

An

cho

rin

g

C L

18.0

0.38

Typ

ical

of (

2) .7

5 di

a ho

les

for

.50

anch

or b

olts

18.0

0.38

Min

imum

R

ight

Han

d S

ide

Ais

leS

pace

is

18.0

Min

imum

Le

ft H

and

Sid

e A

isle

Spa

ce is

36

.0

Min

imum

R

ear

Ais

leS

pace

is 3

5.0

Min

imum

F

ront

Ais

leS

pace

is 7

8.0

Mou

ntin

g A

ngle

F

urni

shed

On

Equ

ipm

entFig

ure

7-8

Fig

ure

7-7

Fig

ure

7-6

7-13

An

cho

rin

g D

etai

ls


Figure 7-9 Typical Anchoring Methods

7-14

Section 7

OUTDOOR CHANNEL BASE

STANDARD INDOOR FRAME

OUTERWEATHERPROOF

DOOR

CONCRETEFOUNDATION

EMBEDDEDCHANNEL

SYSTEM TO BEDETERMINEDBY INSTALLERCLEARANCE

SPACE1/2-13 WELDNUT

0.38

ANCHOR CLIPFURNISHED WITH

SWITCHGEAR

1/2 -13 x 1.38 GRADE 5BOLT, FLAT WASH ER,LOCK WASHER & NUT

Figure 7-10 Typical Outdoor Anchoring Method—Flat Pad

7-15



OUTERWEATHERPROOF

DOOR

CONCRETEFOUNDATION

EMBEDDEDCHANNEL

SYSTEM TO BEDETERMINEDBY INSTALLERCLEARANCE

SPACE1/2-13 WELD

NUT

0.38


SWITCHGEAR


CONCRETE HOUSEKEEPINGPAD

MAX HEIGHT 7.0",MAX PROJECTION FROM

FACE OF INDOOR FRAME 3.0"

Figure 7-12 Alternate Outdoor Anchoring Method—Housekeeping Pad



OUTERWEATHERPROOF

DOOR

CONCRETEFOUNDATION EMBEDDED

CHANNELSYSTEM TO BEDETERMINEDBY INSTALLER

CONCRETE ANCHOR SYSTEM(SHOULD EQUAL OR EXCEED

ULTIMATE STRENGTH OFGRADE 5 BOLT)

0.38


SWITCHGEAR


2.75CL CL

Figure 7-11 Alternate Outdoor Anchoring Method—Flat Pad


Power/Vac® Outdoor Protected AisleRequired Channel SupportFor Elevated Installations

Sec

tion

1S

ectio

n 2

Sec

tion

3S

ectio

n 4

Sec

tion

5

Mai

nten

ance

Ais

le

1. F

ront

edg

e of

Ais

le2.

Tw

o C

hann

els

supp

ortin

g th

e ai

sle

floor

.3.

Cha

nnel

at f

ront

edg

e of

sw

itchg

ear.

4. C

hann

el 4

9" b

ack

from

fron

t of

switc

hgea

r.5.

Cha

nnel

at r

ear

edge

of s

witc

hgea

r.

(Rec

omm

ende

d ch

anne

l min

imum

of

4" x

5.4

lbs/

ft.)

Fig

ure

7-1

3

7-16

Par

tial

Pla

n V

iew

Section 7

Front of Equipment Front of Equipment Front of Equipment

Front of Equipment Front of Equipment

Front of Equipment

X"

4.12

Available space for primary cables. X = 29" above X = 32" below

24.0 6.06.0

18.0

4.12

Available space for primary cables

below

24.0 6.06.0

Standard 1- High Cable Space3000A Breaker Cables Below

18.0

10.0

Available space for primary cables,

above

24.0 6.06.0

Standard 1- High Cable Space3000A Breaker Cables Above

32.0

4.12

Available space for primary cables above or below

24.0 6.06.0

Standard 1- High Cable Space3500/4000A Breakers, 106" depth,

Cables Above or Below

Standard 1-High Cable Space1200A or 2000A Breakers

Above or Below

20.0

4.12

Available space for primary cables, top Breaker above or bottom Breaker below

24.0 6.06.0

8.75

16.010.0Available space for

primary cables, top Breaker below or

bottom Breaker above

Standard 2-High Cable Space1200A or 2000A Breakers

Above or Below

2.0

10.0

4.12

Available space for primary cables

24.0 6.06.0

Standard 1- High Cable Space1200A or 2000A Breaker,

Cables Passing Behind Rear Auxiliary Tie Bus

Figure 7-14 Primary Cable Entrance Floor Plan Details

7-17


Fro

nt

of

Eq

uip

men

tF

ron

t o

f E

qu

ipm

ent

Fro

nt

of

Eq

uip

men

t

Rec

om

men

ded

Lo

cati

on

Fo

r S

eco

nd

ary

Co

ntr

ol W

ire

En

tran

ceR

eco

mm

end

ed L

oca

tio

n F

or

Sec

on

dar

y C

on

tro

l Wir

e E

ntr

ance

R

eco

mm

end

ed L

oca

tio

n F

or

Sec

on

dar

y C

on

tro

l Wir

e E

ntr

ance

Into

P

T/C

PT

Ro

llou

t C

om

pt

Sta

nd

ard

Bre

aker

Co

mp

artm

ent

-

En

try

Ab

ove

or

Bel

ow

Ro

ll-in

Bre

aker

Co

mp

artm

ent

-

En

try

Ab

ove

Ro

ll-in

Bre

aker

Co

mp

artm

ent

-

En

try

Bel

ow

6.5

1.7

1.5

11.5

6.5

(indo

or)

9.5

(out

door

std

)

2.5

2.5

11.5

2.5

2.5

4.5

Spa

ce fo

r co

ntro

l le

ads/

cond

uit

Spa

ce fo

r co

ntro

l le

ads/

cond

uit

Spa

ce fo

r co

ntro

l le

ads/

cond

uit

Sec

onda

ry C

ondu

it E

ntra

nce

Flo

or P

lan

Det

ails

All

Dim

ensi

ons

In In

ches

6.5

(indo

or)

9.5

(out

door

std

)

NO

TE

S:

Max

imum

con

duit

proj

ectio

n ab

ove

pad,

1.0

".

9.5

" di

men

sion

for

Out

door

Sta

ndar

d is

from

face

of w

eath

erpr

oof o

uter

doo

r.

Fig

ure

7-1

5

7-18

Sec

on

dar

y C

on

du

it E

ntr

ance

Flo

or

Pla

n D

etai

lsA

ll D

imen

sio

ns

In In

ches

Section 7

BUS DUCTFLANGE

OPENING

CL

03/02/01/

CL CL CL

28.00

12.75 8.00 8.00

68.50TO

FRONTOF UNIT

94.00

REAR

PARTIAL TOP VIEW1200A & 2000A - ABOVE

GRD BUSCONNECTION

(WHEN REQ"D)

BUS DUCTFLANGE

OPENING

CL

03/02/01/

CL CL CL

33.00

12.75

10.00 10.00

X

67.50 TO FRONT OF UNIT IF"A" COMPARTMENT BLANK

74.00 TO FRONT OF UNIT IFR/O IN "A" COMPARTMENT

X =

94.00

REAR

PARTIAL TOP VIEW3000A - ABOVE

CL OF UNIT

CL OF UNIT

BUS DUCTFLANGE

OPENING

CL

03/02/01/

CL CL CL

33.00

16.0010.00 10.00

88.11 TOFRONT OF

UNIT

106.00

REAR

PARTIAL TOP VIEW3500A & 4000A - ABOVE

CL OF UNIT

NOTES:1. BOOTS FOR SWGR TO BUS DUCT JOINT FURNISIHED BY BUS DUCT VENDOR, OR TAPE JOINTS PER INSTRUCTION BOOK GEK-39672.2. FOR BOTTOM ENTRY OR OUTDOOR CONSTRUCTION, CONSULT GE SALES.3. DIMENSIONS SHOWN ARE FOR ESTIAMTING PURPOSES ONLY.4. GROUND OR NEUTRAL BUS CONNECTION FURNISHED WHEN REQUIRED, CAN BE LOCATED ON LEFT OR RIGHT SIDE.

Figure 7-16 Standard Power/Vac® Indoor Non-Seg Bus Duct Interface

7-19


CL

03/

02/

01/CL

CL

CL

03/

02/

01/CL

CL

CL

03/

02/

01/CL

CL

82.75

71.75

60.75

35.94

24.94

13.94

64.88

53.88

42.88

72.38FACE OF

BAR

71.62FACE OF

BAR

57.62FACE OF

BAR

0FRONT OF UNIT

0FLOOR LINE

STANDARD MAINBUS CONNECTION

ALTERNATE TIEBUS CONNECTION

2.00

.25

7.38

GROUND BUS52.38

B

B

C

C

A

A

A

A

A

A

PH 1 CL

PH 2 CL

PH 3 CL

INSULATION

4.50

3.50

6.00

1.50

.125

2.62

.75

.66 DIA HOLESFOR .50 BOLTS

10.00

SECTION "A - A"STANDARD ARRANGEMENT

PORCELAINSLEEVE (IF USED)

NOTE:TWO (2) BARS ARE REQUIREDFOR 3000A, 3500A and 4000A BUS

AMPS "X" THK1200 .19

2000 .383000 .75 .383500 1.00 .624000 1.00 .62

SECTION "B - B" SECTION "C - C"GROUND BUS

.75

.44 X 1.002 SLOTS

1.00.50

1.36

SIDEVIEW

NOTES:

1. ALL DIMENSIONS SHOWN ARE THE SAME FOR STA NDARD ARRANGEMEMNT(MATCHING EQP'T ON THE RIGHT) AND REVERSE ARRANGEMENT (MATCHINGEQUIPMENT ON LEFT) IN RELATION TO FLOOR LINE AND FRONT OF UNIT.

2. TRANSITION SECTIONS (IF REQUIRED) ARE TO BE FURNISHED BY MATCHINGEQUIPMENT MANUFACTURER.

3. SEE SPECIFIC COORDINATION DRAWING, 0144D2303, FOR AD DITIONAL DETAILS.

1.44

4.00

4.50

9.00CL

"X"57.62 MAIN BUS

71.62 LOWER BUS72.38 UPPER BUS

FACE OF BAR

FR

ON

T O

F U

NIT

7-20

Figure 7-17 Standard Indoor Power/Vac® Bus ExtensionFor Connection to GE Limitamp (MV Motor Control)

and GE Breakmaster (MV Load Interrupter Switches)

Section 7

CL

03/

02/

01/CL

CL

82.75

71.75

60.75

0

0FLOOR LINE

1.12 DIA HOLEFOR .75

CONDUIT

12.00

B

B

CC

A

A

PH 1 CL

PH 2 CL

PH 3 CL

INSULATION

4.50

3.50

6.00

1.50

6.00

2.62

.75


10.00


PORCELAINSLEEVE (IF USED)1.44

4.00

4.50

9.00CL

"X"72.38 UPPER BUSFACE OF BAR


AMPS "X" THK1200 .192000 .383000 .75 .38

3500 1.00 .624000 1.00 .62

SECTION "B - B"

SECTION "C - C"GROUND BUS

.75

.50 DIAHOLES FOR.38 BOLTS

2.00

.50

SIDEVIEW

STANDARD INDOOR POWER/VAC TRANSFORMERTHROAT CONNECTION

CL OF THROAT

41.00OVERALL

25.00 OVERALL

OFTHROAT

CL

95.00

73.0

0

.50 DIACLEARANCEHOLES FOR.38 BOLTS

GROUNDBUS

.25 X 2.0

72.9

4

FR

ON

T O

F U

NIT

0

94.00

GROUNDBUS

.25 X 2.0

4.00

4.00

1. ALL HARDWARE FOR TRANSFORMER FLANGE TO POWER/VACEQUIPMENT FLANGE & SWITCHGEAR FLEX -CONNECTIONSFURNISHED BY GE.2. ALL FLEX CONNECTORS AND INSULATION MATERIAL FORATTACHMENT TO POWER/VAC PHASE OR GROUND BUS IS TO BEFURNISHED BY TRANSFORMER SUPPLIER.3. SEE DRAWING 0144D2301 FOR ADDITIONAL DETAILS.ALTERNATE CENTER MAIN BUS AND LOWER AUXILIARY BUSPOSITIONS ARE AVAILABLE.

4. THE TRANSFORMER MANUFACTURER TO PROVIDE FLANTO MATCHING POWER/VAC THROAT WHICH AL LOWS 18.0"MINIMUM WORK SPACE BETWEEN E QUIPMENT.5. ALIGNMENT OF TRANSFORMER TO SWITCHGEAR, (CENTELINE, FRONT OR REAR ALIGNMENT) TO BE PER TRANSFORMMANUFACTURER'S STANDARD UNLESS SPECIFIED OTHERWBY PURCHASE ORDER.6. ALL DIMENSIONS SHOWN ARE THE SAME FOR STANDARDARRANGEMEMNT (MATCHING EQP'T ON THE RIGHT) ANDREVERSE ARRANGEMENT (MATCHING EQUIPMENT ON LEFT)RELATION TO FLOOR LINE AND FRONT OF UNIT.

6.00

PARTIAL REAR VIEW

18.00 MIN.

TRANSFORMER

SEE NOTE 4

Figure 7-18

7-21

STANDARD INDOOR Power/Vac®

TRANSFORMER THROAT CONNECTION


Figure 7-19

STANDARD OUTDOOR Power/Vac®

TRANSFORMER THROAT CONNECTION

7-22

CL

03/

02/

01/CL

CL

85.75

74.75

63.75

0

FLOOR LINE 0

1.12 DIA HOLEFOR .75

CONDUIT

15.00

A

A


PORCELAINSLEEVE (IF USED)1.44

4.00

4.50

9.00CL

"X"72.38 UPPER BUSFACE OF BAR


AMPS "X" THK1200 .192000 .383000 .75 .38

3500 1.00 .624000 1.00 .62

SECTION "B - B" SECTION "C - C"GROUND BUS

.75

.50 DIAHOLES FOR.38 BOLTS

2.00

.50

SIDE VIEW

CL OF THROAT

41.00OVERALL

25.00 OVERALL

OFTHROAT

CL

98.00

73.0

0

.50 DIACLEARANCEHOLES FOR.38 BOLTS

GROUNDBUS

.25 X 2.0

72.9

4

FR

ON

T O

F U

NIT

0

94.00

OVERHANG3.50

1. ALL HARDWARE FOR TRANSFORMER FLANGE TO POWER/VACEQUIPMENT FLANGE & SWITCHGEAR FLEX -CONNECTIONSFURNISHED BY GE.2. ALL FLEX CONNECTORS, GASKETS AND INSULATIONMATERIAL FOR ATTACHMENT TO POWER/VAC PHASE ORGROUND BUS IS TO BE FURNISHED BY TRANSFORMER SUPPLIER.3. SEE DRAWING 0144D2302 FOR ADDITIONAL DETAILS.ALTERNATE CENTER MAIN BUS AND LOWER AUXILIARY BUSPOSITIONS ARE AVAILABLE.

4. THE TRANSFORMER MANUFACTURER TO PROVIDE FLANGETO MATCHING POWER/VAC THROAT WHICH AL LOWS 18.0"MINIMUM WORK SPACE BETWEEN E QUIPMENT.5. ALIGNMENT OF TRANSFORMER TO SWITCHGEAR, (CENTER-LINE, FRONT OR REAR ALIGNMENT) TO BE PER TRANSFORMERMANUFACTURER'S STANDARD UNLESS SPECIFIED OTHERWISEBY PURCHASE ORDER.6. ALL DIMENSIONS SHOWN ARE THE SAME FOR STANDARDARRANGEMEMNT (MATCHING EQP'T ON THE RIGHT) ANDREVERSE ARRANGEMENT (MATCHING EQUIPMENT ON LEFT) INRELATION TO FLOOR LINE AND FRONT OF UNIT.

B

B

CC

PH 1 CL

PH 2 CL

PH 3 CL

INSULATION

4.50

3.50

6.00

1.50

6.00

2.62

.75


10.00

GROUNDBUS

.25 X 2.0

4.00

3.00

WEATHERPROOFDOOR

PARTIAL REAR VIEW

18.00 MIN.

TRANSFORMER

SEE NOTE 4

Section 7

Figure 7-20OPTIONAL SUPERSTRUCTURE

"A"

"B"

TYPE OF ROLLOUT "A" "B" VT 131.00 36. 00 CPT 137.00 42 .00

63.00

7-23

Figure 7-202-high feedrer breaker with VT “Top Hat”connected to “A” compartment breakercable connection.

NOTES:ROLLOUT TRAY MAY BE SAME AS ANY OF OURSTANDARD CONFIGURATIONS. ROLLOUT MUST BE “LINE”CONNECTED TO “A’ COMPARTMENT BREAKER ONLY

TOP HAT SUPERSTRUCTURE ONLY AVAILABLE ONINDOOR CONSTRUCTION.

SPECIAL LIFT TRUCK REQUIRED TO REMOVE TRAY FROMSTRUCTURE ON TOP OF UNIT (0144D2911G005)

SUPERSTRUCTURE IS REMOVED FOR SHIPMENT


Figure 7-22Main breaker with line connected VTs (2 sets),arrestors and provisions for 6 cables per phaseabove.

Figure 7-21Standard 2-high breakers with cablesexiting above.

1200A or 2000ABREAKER

S/A

VT

VT

CTCT

CTCT

GSCT

GSCT

S/S

S/S

CTCT

CTCT

CTCT

CTCT

BREAKER

BREAKER

Figure 7-21

Figure 7-22

7-24

Section 7

Figure 7-23"A" compartment breaker with cables above."B" compartment bus connected VTs andfused rollout. Large CPT mounted in rearcompartment

37.5KVACPT

MCB&

KEY LOCK

BREAKER

VT

Figure 7-243500A Main Breaker, with line connectionbus to auxiliaries in adjacent section.Incoming cables from above, maximum 10cables per phase with optional adaptorsshown.

Figure 7-23

Figure 7-24

7-25


Figure 7-253000A Tie Breaker, with Bus connectedVTs in upper compartment.

Figure 7-263000A Auxiliary Tie Bus with blank auxcompartment. 1200A Feeder Breakerupper compartment, cables below pastauxiliary tie bus.

Figure 7-25

Figure 7-26

7-26

Section 7

Figure 7-271200A Bus Entrance in uppercompartment, with Line connected VTsand CPT in lower compartment.

Figure 7-284000A Main Breaker, Bus Duct connectionabove.

88.12

FAN

Figure 7-27

Figure 7-28

7-27


36"

Ais

le E

xten

sion

78"

75"

12"

38" Door Width

AIS

LE

36"

94"

Sw

itchg

ear S

ectio

ns36

"W x

94"

D

Switchgear Front

Figure 7-29 Typical Protected Aisle Plan View

7-28

powervac switchgear application guide - pub...

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