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Manual Live-FrontPad-Mounted Switchgear

9

TYPE PSI/IILIVE-FRONT PAD-MOUNTED SWITCHGEAR

15kV • 25kV

The PSI/II Pad-Mounted Switchgear is Federal Pacific's line of live-front pad-mounted switchgear built to IEEE C37.74 requirements and features the fully tested and field proven Auto-jet® load-interrupter switch for switching three-phase circuits and the integral load-interrupter for single-phase load-break operation with fuses.

General• 15kVand25kVClass• ProvenAuto-jet®switching• Ratingsnormallyfoundonlyinmetal-enclosedswitchgear• TestedinaccordancewithANSIC37.72forClass2switchgear

•MeetsIEEEC37.73andC37.74requirementsincluding3-timefault-closingonswitchesandfusemountings

• RemovablebarriersusingNEMAClassGPO-3non-hygroscopicfiberglassreinforcedpolyesterbarriers

• 100%X-rayedcycloaliphaticepoxyinsulators• 11-gaugepickled-and-oiledsteel,allweldedconstruction• MeetsANSIC57.12.28cabinetsecurityandenclosurefinishrequirements

• Stainless-steeldoor-handlecoversandswitchoperatingpockets

• Stainless-steelhingesandhingepins• Overlappingactive-passivedoorsystemwith3-pointauto-latchdoormechanism,padlockabledoorhandleandstandardpenta-headoroptionalhex-headsecuritybolts

• Ventilationlouversnotrequired,sufficientventilationbeingattainedthroughnon-gasketeddoorsandroof

• Anti-condensationroofundercoating• PositiveLatchIndicatoronfuseinterruptersverifiesfullylatchedcondition

PSI/IIPad-MountedSwitchgearisdesignedtomeettheswitchingandisolatingrequirementsofelectricaldistributionsystemswith15pre-engineeredswitchingconfigurations.Therearestandardunitstocoveralmosteverysituation—radialfeed,loopfeedandmanualprimary-selector switching.Special configurationsanddesignsareavailableupon request. The three-time fault-closeratings,with the laboratoryandfield-provenAuto-jet® system,cansolvebothyour"nearsubstation"highfault-currentandmid-pointloopswitchingapplicationsaswellas"distantend-point"standardfault-currentrequirements.

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ApplicationsPSI/IIPad-MountedSwitchgearlendsitselftomeetdistributionsystem requirements, whether it is a simple radial feed or acomplexloopsystem.With3-pole,group-operatedload-interrupterswitches,3-phasesetsofsingle-polefusesandsolidbustaps—applicationsarealmostunlimited.

Loop Feed

PSI/IIPad-MountedSwitchgearprovidessectionalizinginaloopfeed distribution system. This system, with loop cable beingattachedtothesourceattwopointsanda"normallyopen"switchneartheloadmid-point,providesexcellentmanualsectionalizing.TheAuto-jet®IIswitchesareopenedandclosedasrequiredtoisolateacableproblemorfaultedcircuitconditionandtoprovidecompleteservicerestoration.

PSI/II Pad-Mounted Switchgear provides isolation and fuseprotection in radial systems. Radial systems are usedwhereservice reliability and load typedonotwarrant the increasedinvestmentofthemoreflexibleloopsystem.Theradialsystemisusedwheretherearemanylateralcables,eachtoserveasmallnumberofdispersedloads.

PSI/II Pad-Mounted Switchgear units are applied as primaryselector switches to serve critical loads. This allows manualrestorationofserviceuponthelossofthepreferredsource.

Primary Selector Switch

SIMPLE OPEN LOOP

⇒

⇒

⇒

N.O.

ZZ

Radial Feed


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FeaturesThebasicswitchgearenclosurehasbeendesignedtopresentthe smallest possibleprofile commensuratewith thegenerallyacceptedelectricalclearances,operatingprocedures,componentrequirements and variousmethodsof training and terminatingUDcable.

Standard features include: heavy11-gaugehot-rolledpickled-and-oiledsteel,allweldedconstruction,stainless-steelhingesandswitchoperatingpockets,active/passivecompartmentaccessdoorswith3-pointauto-latchdoormechanisms,padlockabledoorhandlesandpenta-headsecuritybolts.Thesestandardfeatures,alongwitharuggedtamper-resistantdesign,provideaunitthatmeetsthestringentsecurityrequirementsofANSIC57.12.28.

ElectricalintegrityhasbeenenhancedbytheAuto-jet®IIswitchingsystem,NEMAClassGPO-3barriers,100%x-rayedcycloaliphaticepoxyinsulatorsandawidechoiceofbothpowerandcurrent-limiting fuses.Highquality steel, corrosion-resistanthardware,chemicalcleaningandphosphatizing,corrosionresistantepoxy-powder primer and a baked powder top-coat make the anti-corrosioncoatingsystemaleaderintheindustry.Thestandardfinishcolorispad-mountgreen,Munsell7GY3.29/1.5.

Standardoptionsletyouselectunitsthatbestserveyourneedsandoperatingpractices.Optionsinclude:frontbarrierstomeeteitherNESCorRUSspecifications;basespacerstoprovideforincreasedcableterminatingheight;groundstirrupsforconvenientcablegrounding;keyinterlockingforanti-parallelingandaccesscontrol;andsurgearresters.Theseare justa fewof themanyoptionslistedonpages18and19.

BarriersDesigningequipmenttoaminimumsizeconsistentwithelectricalclearancerequirementsaddsto theaestheticqualitiesofpad-mountedswitchgear.Theuseofinterphase,phase-to-groundanddual-purposefrontbarriersenhanceoperationbyfieldpersonnel.Theoptionaldual-purposebarriers,intheirnormalhangingposition,helppreventinadvertentcontactwithliveparts.Inaddition,thesebarrierscanbetemporarilyinsertedintotheopengapwhentheswitchor fuse isopen,butshouldnot remain in thisalternatepositionformorethanoneweek.Afixed,clearwindowpanelabovetheswitchdual-purposebarriersallowsvisualverificationoftheswitchbladepositionwiththebarriersintheirnormalhangingposition.Afixedmetalpanelismountedabovethedual-purposebarriersinthefusecompartments.

Somebarriersystemswhilehighlydesirable,restrictthespaceavailableforinstallingandterminatinghigh-voltagecablesenteringtheswitchandfusecompartments.Toeliminatethisrestriction,FederalPacific'sstandardbarriersystem,inPSI/IIswitchandfusecompartments,incorporatesunique"removable"barrierswhichallowremovalofinterphasebarriersduringcableinstallation...withoutremovalofanyhardware.Withtheswitchgearcompletelyde-energized, removal of these barriers from a compartmentfacilitatescable installation, terminationand repair. Inorder togetthissamefreedomduringinstallation,otherbarriersystemsrequiretimeconsumingdisassemblyandreassembly.

Fuse-compartment interphase barriers are removable without loosening hardware — no tools required. Interphase barriers are NOT to be removed when switchgear is energized.

Switch-side removable interphase barriers facilitate cable installation and termination. Interphase barriers are not to be removed when switchgear is energized.

Fuse-compartment dual-purpose barriers in normal hanging position.

Switch compartments (above) with dual-purpose barrier shown in normal hanging position on compartment at right and in alternate slide-in position on compartment at left. Barrier should not be left in alternate position for more than one week. Hinged-B4 barrier shown on switch compartment at left.

Fuse compartments (at right) shown with dual-purpose barriers in temporary storage position on door, in alternate slide-in position on center phase of left compartment (barriers should not be left in alternate position for more than one week) and in normal hanging position on right compartment.

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Auto-Jet® II SwitchThe unique feature of the Federal Pacific PSI/II Pad-MountedSwitchgearistheAuto-jet®II3-polegroup-operatedswitch.TheAuto-jet®IIswitchprovides600amperescontinuousandloadbreakat 15kV and 25kV, 40,000 amperes RMS/ASYM momentaryand3-timefault-closecapability.Switchesrated1200amperescontinuousand interruptingarealsoavailable.TheAuto-jet® IIswitchprovidesauniquemethodofloadinterruption,producinga laminated jet of air which extinguishes the arc. Auto-jet® IIswitchesaredesignedtoprovideasafeandconvenientmeansfor 3-pole switching of distribution transformers, cable loopsand laterals,and toprovidemanualselectionofpreferredandalternatesources.

AllAuto-jet®IIswitcheshaveaheavy-gaugesteelframewhichassurespropercontactalignmentandeliminatesanyproblemofswitch-to-enclosurealignment.Aquick-make,quick-breakstoredenergymechanismwithheavy-duty,long-lifediesprings,provideshighspeedopeningandclosing independentof theoperatinghandlespeed.Thishighspeedmechanismassuressafe3-timefault-closingcapabilityand load interruptionwith theAuto-jet®II interrupter.Theswitchbladesaremadeofhighconductivitycopper.Currenttransferfromtheswitchbladethroughthehingeterminal is accomplished by a unique current transfermeans,consistingofasilver-platedberylliumcopper louveredcontactband encircling a silver-plated copper heavy walled precisionbushingatthehingepoint.Duetohigherthannormalcurrentflow,magneticforcestendtorotatethelouversonthecontactbandtowardaverticalposition,providingahighercontactpressureforfault-currentduty.

Illustration of Auto-jet® II Switch Interrupter

Switch closed with opening spring relaxed. Latch engaged to hold switch in position.

Switch closed with opening spring charged by manual operating handle.

Main contacts parted, puffer and arcing springs charged.

Switch open with latch engaged to hold switch in position.

Auto-Jet® II Switch Ratings

①These are nominal switch ratings. Rating of integrated pad-mounted unit is determined by lowest rated component and may be limited by fuse ratings. Use fuse rating charts on pages 13 and 15 to select proper short circuit values.

② Barriers installed.

③The 3-time fault-close duty-cycle rating means that the device can be closed three times into rated fault-current and remain operable and able to carry and interrupt its rated load-current.

*1-time duty-cycle fault-closing rating is 61ka rms asymmetrical.

15-kV Auto-jet® II Switch

kV Amperes, RMS ①

Nom. Max.Des.

BIL ②

Max.Cont.

Interrupting Mom. & Fault-Close (ASYM

KA)

Fault-Close Duty-Cycle

③

1-sec.(SYM KA)

Max.Load Cap. Mag.

14.4 17 95 600 600 100 21 40 3 2514.4 17 95 1200 1200 100 21 40‡ 3* 2525 29 125 600 600 100 21 40 3 2525 29 125 1200 1200 100 21 40 3 25


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Auto-jet® II Loadbreak Fuse Mountings

Illustration of Auto-jet® EZ-Latch Fuse Interrupter

TheAuto-jet®fusemountinghasadirectdrive,integralloadbreakinterrupterthatpermitssingle-poleliveswitchinginsingle-phaseor three-phasecircuitsby theuseofanordinaryhotstick.TheAuto-jetinterrupterhasa3-timefault-closeduty-cyclewhenthefuse isclosedbrisklywithouthesitation.Theoverallunitratingmaybelimitedbythefuserating.

Thesameuniquelaminatedairjetinterrupterusedinthethree-polegroup-operatedswitchesisappliedintheAuto-jet®loadbreakfusemountings.

Closed: Hookstick ready to open, latch properly engaged. See Positive Latch Indictor in photos at top of page.

Main contacts parted, puffer spring charged, latch disengaged.

Interrupter parted (internal). Holder parted, Auto-jet® reset for next operation.

Auto-jet® for SM-4 Refill UnitShownwithSML-4ZFuseholders

Auto-jet® for DBU or SMU-20 Fuse UnitShownwithDBUFuseAssemblies

ShownhereareonlytwoofthemanyfuseswhichcanbeusedwiththeAuto-jet® fusemountings.Seepages11and13foramorecomplete listingof fusescompatiblewithAuto-jet® fusemountings.

The wide selection of fuse models available in PSI/II Pad-MountedSwitchgearprovidesmaximumflexibilityinthedesignandprotectionofundergrounddistributionsystems.Loadbreak

Auto-jet® fusemountingsaccommodateS&CTypesSM-4andSMU-20,Cutler-HammerTypeDBU,andCooperTypeNXandX-Limiterfusesin15kVand25kVclassPSI/IIunits.

ThePositive-LatchIndicator(PLI)onFPloadbreakfusemountingsis a reliable innovative semiphor target that showswhen fuseassembliesarefullyclosedandlatched,readyforasubsequentloadbreakopeningoperation.

Positive Latch Indicator (fuse latched)

Fuse Open Fuse Closed and Latched

Fuse Open Fuse Closed and Latched

Positive Latch Indicator (fuse latched)

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PSI/II-13 PSI/II-131 PSI/II-14 PSI/II PSI/II-15 67" W x 58-1/2" D 67" W x 58-1/2" D 67" W x 58-1/2" D 67" W x 58-1/2" D

Cat. No. 44300 Cat. No. 43300 Cat. No. 4421* Cat. No. 4403*

PSI/II-3 PSI/II-4 PSI/II-5 35-1/2" W x 44-1/2" D 35-1/2" W x 44-1/2" D 35-1/2" W x 58-1/2" D

Cat. No. 42100 Cat. No. 4201* Cat. No. 4211*

15kV Basic Units-Three-Phase14.4kVNominal•17kVMaximumDesign•95kVBILCircuitDiagramswithCompartmentNumbersPSI/IIPad-mountedSwitchgearisdesignedforuseonlybyqualifiedpersonneltrainedtooperatemediumvoltage(2.4kV-34.5kV)switchgear.Usersotherthanelectricutilitiesareurgedtousekeyinterlockingdevicesasapplicable.Shouldnon-utilityuserselectnottousekeyinterlocks,theymustsubmitwrittencertificationthatonlyqualifiedandtrainedpersonnelwilloperatetheequipment,andthatkeyinterlocksystemsarenotrequired.

ModelsPSI/II-4andPSI/II-15areonlyavailabletoelectricutilities.

All units are 51" high without base spacers. Do not use any dimensions forconstructionpurposes.

TodeterminecompletecatalognumberforPSI/IImodelswithfusecompartmentssubstitutefor"*"shownaslastfigureinthecatalognumber listedbeloweachdiagramonthispagethenumbershowninthefollowingtable:

PSI/II-6 PSI/II-61 PSI/II-7 PSI/II-8 67" W x 58-1/2" D 67" W x 72" D 67" W x 58-1/2" D 67" W x 58-1/2" D

Cat. No. 4321* Cat. No. 4431* Cat. No. 4312* Cat. No. 4412*

PSI/II-9 PSI/II-10 PSI/II-11 PSI/II-12 67" W x 58-1/2" D 67" W x 58-1/2" D 67" W x 58-1/2" D 67" W x 58-1/2" D

Cat. No. 4422* Cat. No. 44400 Cat. No. 4431* Cat. No. 4413*

1 S&C Type SM-4 5 Cutler-Hammer DBU

2 S&C Type SMU-20 6 Cooper (M-E) Type NX

3 Not applicable † 7 Cooper (CT) X-Limiter

† Refer to factory


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Current Ratings - 15kV Basic Units

② SM-4 fused units require three S&CCat. No. 92352 SML-4Z fuseholders and three S&C SM-4 fuse refills per fusecompartment.

SMU-20fusedunitsrequirethreeS&CCat.No.3097SML-20fuseendfittingsandthreeS&CSMU-20fuseunitsperfusecompartment.

DBU fused units require threeCHCat.No.DBU-EFID endfittings and three Cutler-Hammer DBU fuse units per fusecompartment.

NX fusedunits require threesetsofAuto-jet® IIendfittings(seetablebelow)andthreeappropriatelyratedfusesperfusecompartment.

①Three-time fault-close rating: The Auto-jet® II switch can be closed into a fault of the magnitude specified three times and remain operable and able to carry and interrupt the rated current. Exceeds C37.74 rating requirements.

*For units with 1200-ampere switches consult factory.

NOTE:NXClipStylenon-loadbreakfusemountingsareavailableandwillaccommodateupto200ampereNXfuses.

① For fuse application and ordering information, refer to the applicable fuse manufacturer literature.

⑥ Three-time fault-close rating: The Auto-jet® II fuse mounting can withstand a fuseholder or fuse with end fitting being closed into a fault of the magnitude specified three times when closed briskly without hesitation and remain operable and able to carry and interrupt the rated continuous current. Exceeds C37.74 rating requirements. The fuse must be replaced following a fault-closing. Refer to S&C instruction manual for SML-4Z holder and SML-20 end fitting maintenance required after each fault-close or fault interruption.

X-LimiterfusedunitsrequirethreesetsofAuto-jet®IIendfittings(seetablebelow)andthreeappropriatelyratedfusesperfusecompartment.X-LimiterendfittingssuitableforinstallationofcompletefuseassembliesinSML-20PowerFuseMountingsarealsoavailable.Consultfactoryforavailability.

Switch Only Units: PSI/II -3, -10, -13, -131

Auto-jet® II Switch Ratings - Amperes RMS

Continuous Loadbreak Momentary ASYM 3-Time Fault-Close ASYM①600 600 40,000 40,000

1200* 1200* 40,000 40,000

Fuse Only & Switch/Fuse Units: PSI/II -4, -5, -6, -61, -7, -8, -9, -11, -12, -14, -15

Fuse Manufacturer and

Type ①②

Unit Overall RatingsAmperes RMS

Short Circuit ③

Fuse Ratings Amperes RMS

Momentary ASYM

MVA 3-Phaseat 14.4 kV

SYMMax. Loadbreak ④ Interrupting

SYM ⑤

3-Time Fault-Close⑥

ASYMS&C SM-4 20,000 310 200 200 12,500 20,000S&C SMU-20 22,400 350 200 200 14,000 22,400S&C SM-5 ⑦ CONTACT FACTORYCutler-Hammer DBU 22,400 350 200 200 14,000 22,400Cooper (M-E) NX 40,000 620 ① ④ 50,000 40,000Cooper (CT) X-Limiter 40,000 620 ① ④ 50,000 40,000

FusekV

FuseAmperes

Mtg.Code

End Fittings Catalog No.

8.3 1.5 - 40 4 0021-2-03058#8.3 50 - 100 5 0021-2-0305615.5 1.5 - 40 5 0021-2-03056

# Includes a code 5 to code 4 adapter

③ Unit overall ratings are limited to the lowest componentrating.

④ Loadbreak rating same as maximum continuous currentrating.

⑤ RatingsexpressedinRMSamperesasymmetricalare1.6timesthesymmetricalvalueslisted.

⑦ ContactthefactoryforSM-5applications.

FusekV

FuseAmperes

Mtg.Code


8.3 6 - 40 4 0021-2-03058#8.3 50 - 140 5 0021-2-03056

15.5 6 - 40 5 0021-2-03056# Includes a code 5 to code 4 adapter

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Cat. No. 54300 Cat. No. 53300 Cat. No. 5421* Cat. No. 2763*

PSI/II-3 PSI/II-4 PSI/II-5 43" W x 54-1/2" D 43" W x 54-1/2" D 43" W x 74-1/2" D

Cat. No. 52100 Cat. No. 5201* Cat. No. 5211*

25kV Basic Units-Three-Phase25kVNominal•29kVMaximumDesign•125kVBILCircuitDiagramswithCompartmentNumbers

PSI/IIPad-mountedSwitchgearisdesignedforuseonlybyqualifiedpersonneltrainedtooperatemediumvoltage(2.4kV-34.5kV)switchgear.Usersother thanelectricutilitiesareurgedtousekeyinterlockingdevicesasapplicable.Shouldnon-utilityuserselectnottousekeyinterlocks,theymustsubmitwrittencertificationthatonlyqualifiedandtrainedpersonnelwilloperatetheequipment,andthatkeyinterlocksystemsarenotrequired.

ModelsPSI/II-4andPSI/II-15areonlyavailabletoelectricutilities.

All units are 61" high without base spacers. Do not use any dimensions forconstructionpurposes.

TodeterminecompletecatalognumberforPSI/IImodelswithfusecompartmentssubstitutefor"*"shownaslastfigureincatalognumberlistedbeloweachdiagramonthispagethenumbershowninthefollowingtable:

PSI/II-6 PSI/II-61 PSI/II-7 PSI/II-8 82" W x 74-1/2" D 82" W x 90" D 82" W x 74-1/2" D 82" W x 74-1/2" D

Cat. No. 5321* Cat. No. 5431* Cat. No. 5312* Cat. No. 5412*


Cat. No. 5422* Cat. No. 54400 Cat. No. 5431* Cat. No. 5413*

1 S&C Type SM-4 5 Cutler-Hammer DBU

2 S&C Type SMU-20 6 Cooper (M-E) Type NX

3 Not applicable † 7 Cooper (CT) X-Limiter

† Refer to factory


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Current Ratings - 25kV Basic Units

①Three-time fault-close rating: The Auto-jet® II switch can be closed into a fault of the magnitude specified three times and remain operable and able to carry and interrupt the rated current.

② SM-4 fused units require three S&CCat. No. 92353 SML-4Z fuseholders and three S&C SM-4 fuse refills per fusecompartment.

SMU-20fusedunitsrequirethreeS&CCat.No.3097SML-20fuseendfittingsandthreeS&CSMU-20fuseunitsperfusecompartment.†

DBU fused units require threeCHCat.No.DBU-EFID endfittings and three Cutler-Hammer DBU fuse units per fusecompartment.

NXfusedunitsrequirethreesetsofAuto-jet®IIendfittings(seetablebelow)andthreeappropriatelyratedfusesperfusecompartment.

X-LimiterfusedunitsrequirethreesetsofAuto-jet®IIendfittings(seetablebelow)andthreeappropriatelyratedfusesperfusecompartment.X-LimiterendfittingssuitableforinstallationofcompletefuseassembliesinSML-20PowerFuseMountingsarealsoavailable.Consultfactoryforavailability.

③ Unitoverallratingsarelimitedtothelowestcomponentrating.

④ Loadbreak rating same as maximum continuous currentrating.

⑤ RatingsexpressedinRMSamperesasymmetricalare1.6timesthesymmetricalvalueslisted.

⑦ ContactthefactoryforSM-5applications.

† Applicable to solidly-grounded-neutral systems only with fuses connected by single-conductor, concentric-neutral type cable to a transformer or transformers. Rating is 9,400 amperes RMS symmetrical, 15,040 amperes RMS asymmetrical (405 MVA) for all other applications.

① For fuse application and ordering information, refer to the applicable fuse manufacturer literature.

⑥ Three-time fault-close rating: The Auto-jet® II fuse mounting can withstand a fuseholder or fuse with end fitting being closed into a fault of the magnitude specified three times when closed briskly without hesitation and remain operable and able to carry and interrupt the rated continuous current. The fuse must be replaced following a fault-close. Refer to S&C instruction manual for SML-4Z holder and SML-20 end fitting maintenance required after each fault-close or fault interruption.

Switch Only Units: PSI/II -3, -10, -13, -131Auto-jet® II Switch Ratings - Amperes RMS

Continuous Loadbreak Momentary ASYM 3-Time Fault-Close ASYM ①600 600 40,000 40,000

Fuse Only & Switch/Fuse Units: PSI/II -4, -5, -6, -61, -7, -8, -9, -11, -12, -14, -15

Fuse Manufacturer and

Type ① ②

Unit Overall RatingsAmperes RMS

Short Circuit ③

Fuse Ratings Amperes RMS

Momentary ASYM

MVA 3-Phaseat 14.4 kV

SYMMax. Loadbreak Interrupting

SYM ⑤

3-Time Fault-Close⑥

ASYMS&C SM-4† 20,000 540 200 200 12,500 20,000S&C SMU-20 20,000 540 200 200 14,000 20,000S&C SM-5 ⑦ CONTACT FACTORYCutler-Hammer DBU 20,000 540 200 200 14,000 20,000Cooper (M-E) NX 40,000 1,080 ① ④ 50,000 40,000Cooper (CT) X-Limiter 40,000 1,080 ① ④ 50,000 40,000

FusekV

FuseAmperes

Mtg.Code


8.3 50 - 100 5 0021-2-03059#15.5 1.5 - 40 5 0021-2-03059#15.5 50 - 80 6 0021-2-0305513.5 100 6 0021-2-0305523 6 - 40 6 0021-2-03055

# Includes a code 6 to code 5 adapter.

FusekV

FuseAmperes

Mtg.Code


8.3 50 - 140 5 0021-2-03059#15.5 6 - 140 5 0021-2-03059#15.5 50 - 125 6 0021-2-0305523 6 - 40 6 0021-2-03055

# Includes a code 6 to code 5 adapter.

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Optional Features

A7............................... 12"toincreasecableterminatingheightA8............................... 18"toincreasecableterminatingheightA9............................... 24"toincreasecableterminatingheight

BASE SPACER — STAINLESS STEEL

Non-compartmented(Applicabletoallmodels)AS2 ............................. 6"toincreasecableterminatingheightAS3............................. 12"toincreasecableterminatingheightAS4............................. 18"toincreasecableterminatingheightAS5............................. 24"toincreasecableterminatingheight

Compartmented(Applicabletoallmodels)AS6.............................. 6"toincreasecableterminatingheightAS7............................. 12"toincreasecableterminatingheightAS8............................. 18"toincreasecableterminatingheightAS9............................. 24"toincreasecableterminatingheight

BARRIERS

Dual-Purpose Barriers

Thesebarriersarestandardonallunits. Inthenormalhangingpositiontheyhelppreventinadvertentcontactwithliveparts.Theycanbeinsertedintotheopengapwhenswitchorfuseisopen.

B1 Switchbarriers,oneforeachswitch.ApplicabletoallmodelsexceptPSI/II-4&PSI/II-15.

B2 Fusebarriers,one foreach fuse.Applicable toallmodelsexceptPSI/II-3,-10,-13,&-131.

Inner Barrier*

B4 Hingedinsulatingbarrier,oneforeachdooropeningsecuredwith recessed penta-head bolt. Meets RUS "dead-front"requirements.Applicabletoallmodels.

B5 Hingedinsulatingbarrier,samebarrierasB4,excepthex-headsecuritybolt.(NotRUSapproved).

* Meets the requirements of Section 381.G of the National Electrical Safety Code and ANSI standard C2.

FUSE STORAGE HOOKS

Hooks to hang three* spare fuseholders or fuse units with end fittings on fuse compartment door.

E1 Compartment3.ApplicabletoPSI/II-61,-7,-8,-9,-12&-15.

E2 Compartment4.ApplicabletoPSI/II-61-7,-8,-9,-12&-15.

E3 Compartments3&4.ApplicabletoPSI/II-7,-8,-9,-12,&-15.

E4 Compartment1.ApplicabletoPSI/II-4,-12,-15.

E5 Compartment2.ApplicabletoPSI/II-5.

*Only two AJ-NX fuseholders can be accommodated on each fuse door. Not available with SM-5S power fuses.

FINISH COLOR & SPECIAL CABINET MATERIAL

(Applicabletoallmodels)

F2 ANSI61lightgray

F3 ANSI70skygray

F4 ExteriorOnlyofType304StainlessSteelcabinet

F5 CoalTarcoatingonlowerthreeinchesofenclosureoroptionalbasespacer

F6 All Type 304 Stainless Steel Cabinet and (or non-ferrous)hardware, except switch frame and all current-carryingparts

GROUND STUDS

Thesegroundstudsarestandardineachunit.Oneisprovidedoneachterminal,plusonepercompartmenttoprovideaconvenientmeansofgroundingwithjumpers.

G1 Inall fusecompartments.Applicable toallmodelsexceptPSI/II-3,-10,-13,&-131.

G2 Inallswitchcompartments.ApplicabletoallmodelsexceptPSI/II-4,&-15.

G3 Inallbusterminationcompartments.ApplicabletoPSI/II-3,-4,-8,-13,-14&-15.

KEY INTERLOCKS AND SECURITY BOLTS

Nameofultimateuser,installationnumberandlocationofpad-mountedswitchgearrequiredwithorder.

K1 Anti-parallelingkeyinterlockstopreventparallelingswitchesinCompartments1&2.ApplicabletoPSI/II-6,-61**,-9,-10,-11,-13,-131&-14.

K2 Provisionstopadlockswitchinopenorclosedposition.AllmodelsexceptPSI/II-4&-15.

K3 Keyinterlocktopreventopeningfuseaccessdooruntilallswitchesarelockedopen.ApplicabletoPSI/II-5,-6,-61†,-7,-8,-9,-11,-12&-14.

K4 Anti-paralleling and fuse access key interlock to preventparallelingofswitchesinCompartments1&2andtopreventopeningfuseaccessdooruntilallswitchesarelockedopen.ApplicabletoPSI/II-6,-61††,-9,-11&-14.

H Hex-headsecurityboltsinlieuofstandardpenta-headsecurityboltsonallaccessdoors.Applicabletoallmodels.

** Between switches in Compartments 2 & 3 on PSI/II-61.† Between tap switch (Compartment 1) and fuse access door

(Compartment 4) on PSI/II-61.†† On PSI/II-61, anti-paralleling is between switches in compartments

2 & 3, and fuse access door (Compartment 4) is key interlocked with tap switch in Compartment 1.

BASE SPACER — MILD STEEL

Non-compartmented(Applicabletoallmodels)A2 ............................... 6"toincreasecableterminatingheightA3............................... 12"toincreasecableterminatingheightA4............................... 18"toincreasecableterminatingheightA5............................... 24"toincreasecableterminatingheight

Compartmented(Applicabletoallmodels)A6...............................6"toincreasecableterminatingheight


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Optional FeaturesCABLE AND TERMINATION ACCESSORIES

Cable Supports(Includes cable brackets) ①

T3 Oneforeachswitchterminalandbusterminalaccommodating#2through1000kcmilconductor.Applicabletoallmodels.

T4 Oneforeachfuseterminalaccommodating#2through4/0conductor.ApplicabletoallmodelsexceptPSI/II-3,-10,-13,and-131.

Terminal Adapters

T5 Terminal adapter to accommodate two NEMA 1-hole or2-hole connectors per terminal at each switch and busterminal.Formaximumcablesizeof750kcmil.Applicabletoallmodels.

Fault Indicator ProvisionsT6 Mountingprovisionsonly.Toaccommodateonethree-phase

faultindicatorineachswitchcompartment(incompartments2 & 3 only on PSI/II-61). Applicable to allmodels exceptPSI/II-4andPSI/II-15.ForLED-Typefaultindicators,consultfactory.

T7 Mounting provisions only with viewing window. Toaccommodateonethree-phasefaultindicatorineachswitchcompartment(incompartments2&3onlyonPSI/II-61)withfaultindicatorviewingwindowonassociateddoor.ApplicabletoallmodelsexceptPSI/II-4andPSI/II-15.ForLED-Typefaultindicators,consultfactory.

Heavy-duty, polymer-housed surge arresters (without isolator) or equal, for 0-12,000 ft. elevation.

① Application of specified rating may be permissible for ungrounded or resistance grounded systems where a single-phase ground may be tolerated for a period of time not to exceed the arrester's power frequency overvoltage capability.

MISCELLANEOUS

C CopperBus(mainandallterminationpoints)

① Maximum Continuous Operating Voltage

** These devices may extend below the base of the unit. Provide a cable pit or specify a base spacer.

① Cable supports extend below base of unit. Requires the use of a cable pit or specify a minimum of 12" base spacer.

DISTRIBUTION SURGE ARRESTERS

Arrester Location PSI/II Model

Compartment 1 3, 5, 7, 8

Compartment 2 4, 12, 15

Compartments 1 & 2 6, 9, 10, 11, 13, 131, 14

Compartments 2 & 3 61

RatedVoltage

MCOV①Applicable

Models

S1 3kV 2.55kV 15kV only




S5 ** 12kV 10.2kV 15 & 25kV only

S6 ** 15kV 12.7kV 15 & 25kV only




S10 ** 27kV 22.0kV 25kV only

S13Provision only for surge arresters.(Arresters not included.) Applicable to all models.

APPLICATION GUIDENominal System Suggested Arrester Rating

Line-to-LineVoltage

4 WireMutli-GroundedNeutral System

① Delta Ungrounded& Resistance orResonance Wye

Systems Grounded

4,160 3 6

7,200 6 9

7.620 6 9

8.320 6 9, 10

12,000 9 15

12,470 9 15

13,200 9, 10 15

13,800 10, 12 15

20,780 15, 18 21

22,860 18 27

24,940 18 27

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A. General 1. Product

The pad-mounted switchgear shall be PSI/II design asmanufacturedbyFederalPacificandshallconformto thefollowingspecification.

2. Assembly

Thepad-mountedswitchgearshallconsistofasingleself-supportingenclosure,containinginterrupterswitchesandpower fuses with the necessary accessory components,including sensing, controls, and control power supply, allcompletelyfactory-assembledandoperationallychecked.

3. Ratings

a) Ratings for the integrated pad-mounted switchgearassemblyshallbeasdesignatedbelow:(Select15kVor25kVsetsofratingsfromthetablesbelow.

* These are nominal switch ratings. Integrated pad-mounted unit may be limited by fuse ratings. Use fuse rating chart in next column to select proper short circuit ratings.

** The three-time duty-cycle fault-closing rating means that the switch can be closed three times into rated fault amperes and remain operable and able to carry and interrupt its rated load current.

b)Themomentaryandthree-timeduty-cyclefault-closingratingsofswitches,momentaryratingofbus,interruptingratingsoffuseswithintegralload-interruptersshallequalorexceedtheshort-circuitratingsof thepad-mountedswitchgear.

4. Certification of Ratings:

Themanufacturershallbecompletelyandsolelyresponsiblefortheperformanceofthebasicswitchandload-interruptioncomponentsaswellasthecompleteintegratedassemblyasrated.

STANDARD SPECIFICATION FOR LIVE-FRONT 15KV AND 25KV PSI/II PAD-MoUNTED SWITCHGEAR

* When assembled with appropriate end fittings.

** 100 amp @ 13.5 kV max or 80 amp @ 15 kV.

† Applicable to solidly-grounded-neutral systems only with fuses connected by a single conductor concentric neutral type cable to a transformer or transformers. Rating is 9,400 amperes RMS symmetrical, 15,000 amperes RMS asymmetrical (405 MVA symmetrical) for all other applications.

‡ Please contact factory for SM-5 applications.

Themanufacturershallfurnish,uponrequest,certificationofratingsofthebasicswitchcomponentsand/ortheintegratedpad-mountedswitchgearassemblyconsistingoftheswitchandfusecomponentsincombinationwiththeenclosure.

5. Compliance with Standards and Codes

The pad-mounted switchgear shall conform to or exceedtheapplicablerequirementsofthefollowingstandardsandcodes:

a) All portions of ANSI C57.12.28, covering enclosureintegrityforpad-mountedequipment.

b)Article 490.21(E) "Load Interrupters" in theNationalElectrical Code,which specifies that the interrupterswitches in combination with power fuses shallsafelywithstandtheeffectsofclosing,carrying,andinterruptingallpossiblecurrentsup to theassignedmaximumshort-circuitrating.

c)AllportionsofIEEEC37.74,andallportionsofANSIC37.72coveringswitchtesting.

d) All portions of ANSI, IEEE, and NEMA standardsapplicabletothebasicswitchandfusecomponents.

Fuse Ratings

Fuse Manufacturer

Fuse Type

Three-Phase MVA Sym

Amps RMS Asym

3-Time Fault- Close

Asym *

Cont. Amps

Load-* Break Amps

14.4 kV Nominal Voltage

S&C SM-4 310 20000 20000 200 200

S&C SMU-20 350 22400 22400 200 200

S&C SM-5‡ — — — — —

Cutler-Hammer DBU 350 22400 22400 200 200

Cooper (M-E) NX 620 40000 40000 100** 100

Cooper (CT) X-Limiter 620 40000 40000 140 140

25 kV Nominal Voltage

S&C SM-4† 540 20000 20000 200 200

S&C SMU-20 540 20000 20000 200 200

S&C SM-5‡ — — — — —

Cutler-Hammer DBU 540 20000 20000 200 200

Cooper (M-E) NX 1,080 40000 40000 40 40

Cooper (CT) X-Limiter 1,080 40000 40000 140 140

System Voltage Class

15kV 25kV

kV, Nominal 14.4 25

kV, Maximum Design 17 27

kV, BIL 95 125

Main Bus Continuous, Amps 600 600

Switch Load-Interrupting, Amps 600 600

Switch Fuse Load-Interrupting, Amps 200 200

Switch Short-Circuit Ratings*

Amps, RMS Symmetrical 25,000 25,000

MVA, 3-Phase Symmetrical atRated Nominal Voltage

620 1,080

Fault-Closing Amps, RMS,Asym., 3-Time Duty-Cycle**

40,000 40,000

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remove any aluminum-oxide film. Immediately afterthisoperation,theelectricalcontactsurfacesshallbecoatedwithauniformcoatingofanoxideinhibitorandsealant.

3. Ground-Connection Pads

a) Aground-connectionpadshallbeprovided ineachcompartmentofthepad-mountedgear.

b)Theground-connectionpadshallbeconstructedof1/4"thickgalvanizedorstainlesssteel,whichshallbeweldedtotheenclosure,andshallhaveashort-circuitratingequaltothatofthepad-mountedgear.

c) Topreventmoistureingress,theroofshallbeone-piececonstructionandshallnotincludeanygasketedbuttjointsexposedtotheexterior.

C. Construction - Enclosure and Finish 1. Enclosure

a) Thepad-mountedgearenclosureshallbeofunitizedmonocoque (not structural-frame-and-bolted-sheet)construction tomaximizestrength,minimizeweight,andinhibitcorrosion.

b)Thebasicmaterialfortheenclosure,roofanddoorsshallbe11-gaugehot-rolled,pickled-and-oiledsteelsheet.

c) Allstructuraljointsandbuttjointsshallbewelded,andtheexternalseamsshallbegroundflushandsmooth.Boltedstructuraljointsarenotpermitted.

d)To guard against unauthorized or inadvertent entry,enclosureconstructionshallnotutilizeanyexternallyaccessiblehardware.

e) Thebaseshallconsistofcontinuous90-degreeflanges,turnedinwardandweldedatthecorners,forboltingtotheconcretepad.

f) Thedooropeningsshallhave90-degreeflanges,facingoutward,thatshallprovidestrengthandrigidityaswellasdeepoverlappingbetweendoorsanddooropeningstoguardagainstwaterentry.

g) Threeresilientmaterialcushionsshallbeplacedondoor-openingedgestopreventmetal-to-metalcontactthat would damage finish and lead to prematurecorrosion.

h) Enclosure top side edges shall overlap with roofside edges and form an internalmaze to create aninterfacewhichshallallowventilationofhigh-voltagecompartmentstohelpkeeptheenclosureinteriordrywhilediscouraging tamperingor insertionof foreignobjects.

i) Aheavycoatofinsulating"no-drip"compoundshallbeappliedtotheinsidesurfaceoftherooftominimizecondensationofmoisturethereon.

j) InsulatinginterphaseandendbarriersofNEMAGP0-3gradefiberglass-reinforcedpolyestershallbeprovidedforeachinterrupterswitchandeachsetoffuseswhererequiredtoachieveBILratings.

k) Full-lengthsteelbarriersshall separateside-by-sidecompartments and barriers of the same materialshallseparate the frontcompartments fromtherearcompartments.

6. Enclosure Design

a)Toensureacompletelycoordinateddesign,thepad-mountedswitchgearshallbeconstructedinaccordancewith theminimumconstructionspecificationsof thefuseand/orswitchmanufacturertoprovideadequateelectrical clearances and adequate space for fusehandling.

b)Inestablishingtherequirementsfortheenclosuredesign,considerationshallbegiventoallrelevantfactorssuchascontrolledaccess,tamperresistance,ventilationandcorrosionresistance.

B. Construction - Assembly 1. Insulators

The interrupter-switch and fuse-mounting insulatorsshall be of a cycloaliphatic epoxy resin system withcharacteristicsandrestrictionsasfollows:

a)Operatingexperienceofatleast15yearsundersimilarconditions.

b)Ablativeactiontoensurenon-trackingproperties.

c)AdequateleakagedistanceestablishedbytestperIECStandard60507.

d)Adequatestrengthforshort-circuitstressestablishedbytest.

e)Conformance with applicable ANSI and IEEEstandards.

f)Homogeneity of the cycloaliphatic epoxy resinthroughout each insulator to provide maximumresistance to power arcs. Ablation due to hightemperatures from power arcs shall continuouslyexposemorematerialof thesamecompositionandpropertiessothatnochangeinmechanicalorelectricalcharacteristics takes place because of arc-inducedablation.Furthermore,anysurfacedamagetoinsulatorsduringinstallationormaintenanceofthepad-mountedgearshallexposematerialof thesamecompositionandpropertiesso that insulatorswithminorsurfacedamageneednotbereplaced.

g)Each insulator shall be x-rayed toassure it is voidfree.Analternatetestingmethodmaybeusedonlybyapprovaloftheengineer.

2. High-Voltage Bus

a)Busandinterconnectionsshallconsistofbarealuminumbarwithanoxide-inhibitingagentatallbusjoints.

b)Busandinterconnectionsshallwithstandthestressesassociatedwithshort-circuitcurrentsupthroughthemaximumratingofthepad-mountedgear.

c)Boltedaluminum-to-aluminumconnectionsshallbemadewithasuitablenumberof1/2"-13boltsandwithtwoBellevillespringwashersperbolt,oneundertheboltheadandoneunderthenutorwithawide,flange-headcarriageboltandoneBellevillespringwasherperbolt. As an alternate, bolted aluminum-to-aluminumconnectionsshallbemadewithasuitableequivalentsurfacearea,i.e.1-boltandspringwasher.Boltsshallbetightenedtoanappropriatefoot-poundstorque.

d) Before installation of the bus, all electrical contactsurfaces shall first be prepared by abrading to


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l) Liftingtabsshallberemovableandsocketsforthelifting-tabboltsshallbeblind-tapped.Aresilientmaterialshallbeplacedbetweentheliftingtabsandtheenclosuretohelppreventcorrosionbyprotectingthefinishagainstscratchingbythetabs.Tofurtherprecludecorrosion,thismaterialshallbeanopenmeshtopreventmoisturefrombeingabsorbedandheldbetweenthetabsandthe enclosure in the event that lifting tabs are notremoved.

m)Aclosed-cellgasketingmaterialshallbeplacedonthebottomflangeasaprotective interfacebetweenthesteelenclosureandthemountingpad.

n) Interrupterswitchesshallbeprovidedwithdual-purposefrontbarriers.Thesebarriers,intheirnormalhangingpositions,shallguardagainstinadvertentcontactwithliveparts.Itshallalsobepossibletoliftthesebarriersoutandinsertthem(butonlyforatemporarytimeintervalnottoexceedoneweek)intotheopengapwhentheswitchisopen.Awindowpanelshallbeprovidedtoallowviewingoftheswitchpositionwithoutremovingthebarriers.ThesebarriersshallmeettherequirementsofSection381GoftheNationalElectricalSafetyCode(ANSIStandardC2).

o) Eachfuseshallbeprovidedwithadual-purposefrontbarrier.Thesebarriers,intheirnormalhangingpositions,shallguardagainstinadvertentcontactwithliveparts.Itshallalsobepossibletoliftthesebarriersoutandinsertthem(butonlyforatemporarytimeintervalnotto exceed oneweek) into the open gapswhen thefuses are in thedisconnectposition. Thesebarriersshallmeet the requirementsofSection381Gof theNationalElectricalSafetyCode(ANSIStandardC2).

2. Doors

a) Doors shall be constructed of 11-gauge hot-rolled,pickled-and-oiledsteelsheet.

b)Doors providing access to high voltage shall havedoor-edgeflangesthatshalloverlapwithdoor-openingflanges and shall be formed to create an interfacethatshallguardagainstwaterentryanddiscouragetamperingorinsertionofforeignobjects,butshallallowventilationtohelpkeeptheenclosureinteriordry.

c) Doors providing access to high voltage shall haveaminimumof threehinges.Doorhingesshallbeofstainlesssteelwithstainlesssteelhingepinstoprovidestrength,security,andcorrosionresistance.Mountinghardwareshallbestainlesssteelorzinc-nickel-platedsteel,andshallnotbeexternallyaccessibletoguardagainsttampering.

d) In consideration of controlled access and tamperresistance,eachsetofdoubledoorsprovidingaccesstohighvoltageshallbeequippedwithanautomaticthree-pointlatchingmechanism.

1) The latchingmechanismshallbespring loaded,and shall latch automatically when the door isclosed.Alllatchpointsshalllatchatthesametimetoprecludepartiallatching.

2) Apenta-headsocketwrenchortoolshallberequiredtoactuatethemechanismtounlatchthedoorand,inthesamemotion,rechargethespringforthenextclosingoperation.

3) Thelatchingmechanismshallhaveprovisionsforpadlockingthatincorporateameanstoprotectthepadlockshacklefromtamperingandthatshallbecoordinatedwiththelatches.

i) Itshallnotbepossibletoaccessthepenta-headactuatoruntilthepadlockisremoved.

ii) Itshallnotbepossibletounlatchthemechanismuntilthepadlockisremoved.

iii)Itshallnotbepossibletoinsertthepadlockuntilthemechanismiscompletelylatchedclosed.

f) Doorsprovidingaccesstosolid-materialpowerfusesshallhaveprovisionstostoresparefuseunitsorrefillunits.

g) Each door shall be provided with a door holder ofstainlessorplatedsteellocatedabovethedooropening.Theholdershallbehiddenfromviewwhenthedoorisclosed,anditshallnotbepossiblefortheholdertoswinginsidetheenclosure.

3. Finish

a) Fullcoverageatjointsandblindareasshallbeachievedbyprocessingenclosuresindependentlyofcomponentssuch as doors and roofs before assembly into theunitizedstructures.

b)Allexteriorseamsshallbesandedorgroundsmoothforneatappearance.

c) All surfaces shall undergo a chemical cleaning,phosphatizingandsealingprocessbeforeanyprotectivecoatingsareappliedinordertoremoveoilsanddirt,formachemicallyandanodicallyneutralconversioncoating,improvethefinish-to-metalbond,andretardunderfilmpropogationofcorrosion.

d)Thefinishingsystemshallbeappliedwithoutsagsorrunsforapleasingappearance.

e) Aftertheenclosureiscompletelyassembledandthecomponents(switches,bus,etc.)areinstalled,thefinishshallbeinspectedforscuffsandscratches.

f) Blemishesshallbecarefully touchedupbyhand torestoretheprotectiveintegrityofthefinish.

g)Unlessotherwisespecified,thecolorshallbeMunsellNo.7GY3.29/1.5,darkgreen.

h) Toassurethatthefinishingsystemiscapableofresistingcorrosion,themanufacturershallprovideonrequest,certificationthatrepresentativetestpanels,protectedbythemanufacturer'sfinishsystem,havepassedthecoatingsystemperformancecriteriainsection5.4ofANSIC57.12.28.

D. Basic Components 1. Interrupter Switches

a) Interrupterswitchesshallhaveathree-timeduty-cyclefault-closing ratingequal toorexceeding theshort-circuitratingofthepad-mountedgear.Theseratingsdefinetheabilitytoclosetheinterrupterswitchthreetimesagainsta three-phase faultwithasymmetricalcurrentinatleastonephaseequaltotheratedvalue,withtheswitchremainingoperableandabletocarryandinterruptratedcurrent.Testssubstantiatingtheseratingsshallbeperformedatmaximumvoltagewithcurrent applied for at least 10 cycles.Certified testabstractsestablishingsuchratingsshallbefurnisheduponrequest.

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b) Interrupter switches shall be operated by meansof stored-energy operators installed by the switchmanufacturer.

c) Eachinterrupterswitchshallbecompletelyassembledandadjustedbytheswitchmanufactureronasinglerigidmountingframe.Theframeshallbeofweldedsteelconstructionsuchthattheframeinterceptstheleakage path which parallels the open gap of theinterrupterswitchtopositivelyisolatetheloadcircuitwhentheinterrupterswitchisintheopenposition.

d) Interrupterswitchesshallbeprovidedwithasingle-armbladeconstructionwithparallelcurrentpathsforeachphaseforcircuitclosingincludingfault-closing,continuouscurrentcarrying,andcircuit interrupting.Spring-loadedauxiliarybladesthatcanbecomeoutofsequencewithamainbladeshallnotbepermitted.

e) Interrupterswitchbladesupportsshallbepermanentlyfixed in place in a unified hinge contact assemblyutilizingalouveredcontactconfigurationthatprovidesexpansionand, therefore, increasedpressureat thecontact transfer point for a stable interface duringmomentarycurrents.

f) Switch-bladehingecontactsthathavewipingcontactsdirectly connected to switch terminals and can bepulledapartbycableconnectedtotheswitchterminalsarespecificallyprohibited,suchdesignscanpresentpotentialarcingfaultsifcablesarepulled.

g)Circuitinterruptionshallbeaccomplishedbyuseofaninterrupterwhichispositivelyandinherentlysequencedwiththebladeposition.Itshallnotbepossibleforthebladeandinterruptertogetoutofsequence.Circuitinterruption shall take place completely within theinterrupter,withessentiallynoexternalarcorflame.

h) Toincreasecontactseparationspeed,interrupterswitchcontactsonbothsidesofthearcingareashallbespringassistedtoreducearcingtime.

i) Tofurtherinsurearcextinction,airshallbecompressedandsimultaneouslyinjectedintothearcingareatocoolthearcandtherebynotrelysolelyonbladetraveltoinsurearcextinction.

j) Arc extinction shall not rely on gases generated byablative actionof thearcplayingonany interrupterswitchcomponentsormaterialswhichwillcarbonize,deplete or otherwise erode such components andmaterials.

l) Groundstudsshallbeprovidedatallswitchterminals.Groundstudsshallalsobeprovidedonthegroundpadineachinterrupterswitchcompartment.Themomentaryratingofthegroundstudsshallequalorexceedtheshort-circuitratingsofthepad-mountedgear.

The following optional features may be specified:

l) Bracket-mounted distribution-class surge arresters,metal-oxidetype(specifyrating),shallbeprovidedatallsourceswitchterminals.

m)Switch terminals shallbeprovidedwithadapters toaccommodatetwocablesperphase.

n)Mountingprovisionsshallbeprovidedtoaccommodateonethree-phasefaultindicatorwiththreesingle-phasesensorsineachinterrupterswitchcompartmentand(withorwithout,selectone)aviewingwindowinthedoor.

o) MountingprovisionstoaccommodateLED-Typefaultindicators. Holes for such fault indicators shall bepluggedwithatamper-resistantarrangement.

2. Fuses

a) Fuses shall be solid-material power fuses orcurrent-limiting fuses as specified by the equipmentpurchaser.

b) Fuse-mountingjawcontactsshallincorporateanintegralload-interrupterthatshallcomplywithallthepreferredandoptionaltestrequirementsinIEEEC37.74topermitliveswitchingoffuseswithahookstickandshallhavea3-timeduty-cyclefault-closingcapabilityattheinterruptingratingof22,400amperessymmetrical.

1) Theintegralload-interrupterhousingshallbeofthesamecycloaliphaticepoxyresinastheinsulators.

2) Theintegralload-interruptershallbeinthecurrentpathcontinuouslyduringcircuitinterruption.Auxiliarybladesorlinkagesshallnotbeused.

3) Live switching shall be accomplished by a firm,steady opening pull on the fuse pull ring with ahookstick.Noseparateload-interruptingtoolshallberequired.

4) Theintegralload-interruptershallrequireahardpulltounlatchthefusetoreducethepossibilityofanincompleteopeningoperation.

5) Internal moving contacts of the integral load-interruptershallbeself-resettingaftereachopeningoperationtopermitanysubsequentclosingoperationtobeperformedimmediately.

6) Circuit interruption shall take place completelywithintheintegralload-interrupterwithessentiallynoexternalarcorflame.

7) Theintegralload-interrupterandthefuseshallbeprovidedwithseparatefault-closingcontactsandcurrent-carryingcontacts.Thefusehingeshallbeself-guiding and, together with the fault-closingcontacts,shallguidethefuseintothecurrent-carryingcontactsduringclosingoperations.Circuit-closinginrushcurrentsandfaultcurrentsshallbepickedupbythefault-closingcontacts,notbythecurrent-carryingcontactsorinterruptingcontacts.

8) Integral load-interrupters for fuses shall havea three-time duty-cycle fault-closing capabilityequal to the interrupting ratingof the fuseat theapplicablevoltage(14.4kVor25kV).Theduty-cyclefault-closingcapabilitydefinesthelevelofavailablefault-currentintowhichthefusecanbeclosedthethree-timeswithoutaquick-makemechanismandwhen operated vigorously through its full travelwithout hesitation at any point, with the integralload-interrupter remaining operable and able tocarryand interruptcurrentsupto theemergencypeak-loadcapabilitiesofthefuse.

9) Toincreasecontactseparationspeed,integralload-interruptercontactsonthesourcesideofthearcingareashallbespringassistedtoretractand,thereby,reducearcingtime.

10)To further insure arc extinction, air shall becompressedandsimultaneously injected into thearcingareatocoolthearcandtherebynotrelysolelyonbladetraveltoinsurearcextinction.


25

11)Arcextinctionshallnotrelyongasesgeneratedbyablativeactionofthearcplayingonanyinterrupterswitchcomponentsormaterialswhichwillcarbonize,depleteorotherwiseerodesuchcomponentsandmaterials.

c) Fuseterminalpadsshallbeprovidedwithatwo-positionadapter,makingitpossibletoaccommodateavarietyofcable-terminatingdevices.

d)Groundstudsshallbeprovidedatallfuseterminals.Onegroundstudshallalsobeprovidedonthegroundpadineachfusecompartment.Themomentaryratingofthegroundstudsshallequalorexceedtheshort-circuitratingsofthepad-mountedgear.

e) Fuse-mounting interruperhousingshallbeprovidedwithatargetthatprotrudesandbecomesvisibleonlyafterthefusehasbecomefullylatched,secured,closedandreadyforopening.

E. Labeling 1. Hazard-Alerting Sign & Labels

a) Allexternaldoorsprovidingaccesstohighvoltageshallbeprovidedwithsuitablehazard-alertingsigns.

b)Theinsideofeachdoorprovidingaccesstohighvoltageshallbeprovidedwitha"Danger—HighVoltage—KeepOut—QualifiedPersonsOnly"sign.

c) Eachbarrierprovidingaccesstoaninterrupterswitchshallbeprovidedwithasignindicatingthat"SwitchBladesMayBeEnergized in AnyPosition" on bothsides.

d)Bothsidesofeachbarrierprovidingaccesstoafuseshallbeprovidedwitha sign indicating that "FusesMayBeEnergizedinAnyPosition".

e) Anybarriersusedtopreventaccesstoenergizedlivepartsshallbeprovidedwitha"Danger"signonbothsides.

f) Dual-purposebarriersshallbeprovidedwitha labelindicatingthatsuchbarriersshallnotbeleftinsertedintotheopengapformorethanoneweek.

g)Doors to fuse compartments shall include a labelillustratingthecorrectlatchedconditionfortheintegralloadinterrupter.

h) Doors to fuse compartments shall include a labelillustratingcorrectopening/closingswitchingoperationforfuseswithintegralloadinterrupters.

2. Nameplate, Ratings Labels, & Connection Diagrams

a)The outside of both the front and back shall beprovidedwithnameplatesindicatingthemanufacturer'sname, catalog number, model number, and date ofmanufacture.

b)Theinsideofeachdoorshallbeprovidedwitharatingslabel indicating the following: voltage ratings; mainbuscontinuous rating;short-circuit ratings (amperes,RMSsymmetricalandMVA three-phasesymmetricalat rated nominal voltage); the type of fuse and itsratingsincludingduty-cyclefault-closingcapability;andinterrupter switch ratings, including duty-cycle fault-closingcapabilityandamperes,short-time,(momentary,

amperesrmsasymmetricalandone-second,amperesrmssymmetrical).

c)A three-line connection diagram showing interrupterswitches,fusesandbusalongwiththemanufacturer'smodelnumbershallbeprovidedontheinsideofboththefrontandreardoors,andontheinsideofeachswitchoperatinghubaccesscover.

F. Accessories 1. Furnish fuse components of the type specified by

thepurchaser.Nofuseunitsshallbesuppliedunlessactuallynotedbythepurchaserinthespecificationsavailabletotheswitchgearmanufactureratthetimeofquotation.

2.A fuse handling tool as recommended by the fusemanufacturershallbefurnishedifnotedbythepurchaserinthespecifications.

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Features:•Live-front600-AmpereSwitchCompartments

•Live-front200-AmpereFuseCompartments

• Manual,AutomaticSourceTransfer,andSCADA-Controlled

•Anexceptionalcombinationofswitch(upto5)andfuse(upto5)compartments,includingbus-tieconfigurations

• MeetsIEEEC37.74requirements,including3-timefault-closingofswitches.

•MeetsenclosuresecurityrequirementsinANSIC57.12.28

TYPE PSI/II LIVE-FRONT 6-COMPARTMENT PAD-MOUNTED SWITCHGEAR

15kV

The FP 6-Compartment Live-Front PSI/II Pad-mounted Switchgear expands the load segmentation possibilities for underground distribution systems by allowing larger concentrated loads to be served from a single enclosure, requiring less space and less expense.

Federal Pacific 6-Compartment, Live-front Pad-mountedSwitchgearprovidestheconvenienceofinstallingasingleenclosurewithtwo600-ampereswitchesanduptofourthree-phasesetsoffuses.Installationswithconcentratedloadscannowbeservedfromasingleswitchgearassembly.Thesix-compartmentconfigurationsrequirelesslandspacethantwofour-compartmentunits,whichwastheonlychoiceinthepast.Inaddition,the6-compartmentunitsaremoreeconomicalthantwofour-compartmentunitsbothin initial and installed costs. There is no sacrifice in operatingflexibilityand,asaresult,anoutageonthemainfeedercablecanbereadilyisolatedandsectionalized.

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Live-front switches utilize conventional, skirted terminators and eliminate the need for costly, difficult to handle 600-ampere elbow connectors.

Groundstudsupfrontforclearaccess

Switchterminalsreadilyaccessibleforconnectionofskirtedterminators

Dual-purposebarriersprovideasecondbarrieragainstinadvertentcontactwithenergizedpartsofswitches.Barrierscanberemovedandslidebetweenswitchbladeanduppercontacts,isolatinglowersectionfromenergizedbusattop.Barriersarenottobeinstalledintheslide-inpositionformorethanoneweek.

Compartmentgroundwithtwo-holeNEMApadforconnectionofconcentricneutralcableandgroundingclamps

SurgeArresters(optional,notvisible)mountbelowandtotherearofswitchterminals,outofthewaywheninstallingterminatorsorpullingofcable.

Switchinterphasebarriersareremovabletofacilitatepullingandterminatingcableswhentheunitisde-energized.Interphasebarriersarenottoberemovedunlessswitchgeariscompletelyde-energized,testedforvoltageandgrounded.

Enclosure integrity and security is assured with FP Type PSI/II Pad-mounted Switchgear.

Cross-kinkedroofletswaterflowoffenclosure.

Powderepoxyfinishiselectrostaticallydepositedandbakedontoprovideatough,durable,high-glossfinishwithcharacteristicsprovenbyANSIC57.12.28standardtestingtoprotectthemetalthroughouttheservicelifeofthepad-mountedswitchgear.

Allcompartmentsventilatedatroof-lineandatdoorflanges.

11-gaugesteelenclosure,roofanddoors

Bottomflangeofenclosureisgasketedtoprotectfinish.

Setofthreestainlesssteelhingesandhingepinsoneachdoor

Self-latchingdoorsecuritysystemcontrolsaccesstointerior.Latchingsystemincludeshingedpadlockablecoverwithoverhangtoshieldpadlockshackle.Penta-headboltisnotexposedwhencoverispadlocked;canberotatedclockwiseorcounterclockwisetoopendoor.Interiorlatchesdonothaveanyfastmovingparts.


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Fuse compartment (at center) includes dual-purpose barriers, shown with barrier removed on center phase and normal hanging position on other two phases. Barriers are not to be left in the slide-in position for more than one week. Interphase barriers are not to be removed when the unit is energized. Temporary storage position for switch dual-purpose barrier is illustrated on door at left and for fuse dual-purpose barrier is illustrated on door at center.

Compartmentgroundwithtwo-holeNEMApadforconnectionofconcentricneutralcableandgroundingclamps.

Groundstudsupfrontforclearaccess

Fuseterminalsreadilyaccessibleforconnectionofskirtedterminators

Dual-purposebarriersprovideasecondbarrieragainstinadvertentcontactwithenergizedfuseliveparts.Barrierscanberemovedandslidebetweenopenfuseanduppercontacts,isolatinglowersectionfromenergizedbusattopasillustratedonthecenterphaseofthecompartment.Barriersarenottobeleftintheslide-inpositionformorethanoneweek.

Fuseinterphasebarriersareremovabletofacilitatepullingandterminatingcableswhenunitisde-energized.

Newpositivelatchindicatorextendstoshowthatfuseisfullyseated,latchedandreadyfornextopeningoperation.

Temporarystoragepositionforfusedual-purposebarrier.

Manua

l Live-

Front

Pad-M

ounted

Switch

gear

30

Typical configurations for models of FP Live-Front 6-Compartment Pad-mounted Switchgear. Consult factory for other available circuit configurations. Dimensions will vary depending on circuit configuration, however, a typical dimensions for 15kV units is 59" H x 110.3" W x 58.5" D. Do not use dimension for construction purposes.

Drawing Number 37-0146-001 — Two incoming switches and four fused feeders

Drawing Number 37-0146-002 — Three incoming switches and three fused feeders

Drawing Number 37-0146-004 — One incoming switch, four fused feeders and one blank

15kV Live-Front Circuit Configurations

Drawing Number 37-0146-005 — One incoming switch and five fused feeders

Drawing Number 37-0146-006E — Four incoming switches with surge arresters and two fused feeders

Drawing Number 37-0146-003 — Four incoming switches and two fused feeders

Drawing Number 37-0146-012 — Three independent switched circuits each with one incoming switch and one outgoing bus-only termination

Drawing Number 37-0146-019E — Three incoming switches and three fused feeders

Drawing Number 37-0146-032E — Two incoming switches, two fused feeders and two bus-only feeders

Drawing Number 37-0146-022E — Three incoming switches and two fused feeders

Drawing Number 37-0146-023 — Bus-Tie Configuration with two outgoing bus-only tap circuits

Drawing Number 37-0146-033 — Bus-Tie Configuration with two switched feeders

COMPARTMENT 4 COMPARTMENT 5 COMPARTMENT 6




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