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7/27/2019 MV Busduct Catalogue
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7/27/2019 MV Busduct Catalogue
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7/27/2019 MV Busduct Catalogue
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MediumVoltageBusductSystem Overview
Introduction
PowerbarManufacturesandprovidewiderangeofMediumvoltagebusductanditsaccessories.
ProductRange
Isolatedphasebusduct.(11kVto33kVupto25000AAircooled). Segregatedphasebusduct.(3.3kVto33kVupto5000A). NonSegregatedphasebusduct.(0.415kVto3.3kVupto5000A). DCBusductSystem. LAVTCubicles. NeutralGroundingCubicles. Lineandneutralsideterminalboxes. PressurizationSystemforIPBD. HotAirblowingsystem.
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IsolatedPhaseBusduct
APPLICATION
UsedinPowerGeneratingStationsconnections,interconnectionbetweengenerator
anditsassociatedgeneratortransformer,unit
transformerandassociatedauxiliaryequipment.
Eachphaseconductorismountedinseparate
enclosure&iscapableofcarryingmuchhigher
currentforagivenpermissibletemperatureasthe
availableareaofheatdissipationismuch
comparedtoSPB(SegregatedPhaseBusduct&
NSPB(NonSegregatedPhaseBusduct)
RATINGS
11kVto33kV,Upto25000A&50/60Hz.
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Crosssectionview
SalientFeatures
IndependentPhase:Nearlynilmutualinduction. VoltageriseinEnclosure:VeryLow Excellentshieldingundershortcircuitconditions:Neareliminationofforces. Negligibleinductionwithneighboringequipment:Noheatandlosseffect. IndependentEnclosures:PhasetoPhasefaultimpossible. Continuouslyweldedenclosures:
Nowateranddustingress.
Betterinsulationresistance.
Enhancedefficiencyofboltedcontacts.
Freemovementofconductorduringexpansion:Nocantileverforcesoninsulators. Enclosuresinsulatedfromsupportstructures:
Avoidsundesirableinducedcirculatingcurrentbeyondregularpath.
Noundesirablecurrentloopsandhencenoheatinginsupportingbeams.
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Ty
icalLay
Isolate
individ
Thebu
ut
PhaseB
almetal
maybes
sduct(IP
ousings
elfcooled
)isonei
paratedf
bymean
whichea
omadjac
ofcircul
chphase
entcondu
tingairin
onductor
ctorhousi
sidethep
isenclos
ngbyan
haseencl
dbyan
irspace.
sure.
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Accessories
1.Enclosure
2.Conductor
3.Conductor(Insulator)
4.ConductorRigid&ExpansionJoint
5.RubberBellow
6.Termination
at
Equipment
End
(Copper
flexible)
7.Wallframeassemblywithsealofbushing
8.SupportingStructure
9.Hotairblowersystem
10.CurrentTransformer
11.LAVTCubicles/Panels
12.NGCubicles/Panels
13.Airdryerwithcompressorandairpressurization
system
14.FilterDrainPlug
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StandardApplicable
IEEEC37.23/BS159/IS:8084
Test
TypeTest
Shorttimecurrentwithstandtest Impulsevoltagewithstandtest Temperaturerisetest
RoutineTest
DryPowerfrequencyvoltagewithstandTest Insulationresistancetest Paintcoatingthicknessmeasurement WeldingXRaytesting Dyepenetrationtest
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SegregatedPhaseBusduct
APPLICATION
SegregatedPhaseBusductisdesignedwithconductorsenclosedinacommonenclosure
andwithmetallicbarriersbetweeneachofthreephases.
Theirdesignandconstructionprovidesthestrengthrequiredforheavydutyserviceand
extremeshortcircuitconditions.Operatableinawidevariationofclimaticconditions;
especiallyincaseswhereitisnotpossibletoutilizeapplicationofIsolatedPhaseBusduct
forspaceorbudgetrestrictions.
RATINGS
3.3kVto33kV,Upto5000A&50/60Hz.
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Crosssectionview
SalientFeatures
3PhBusducthousedincommonmetallicenclosure.Phasessegregatedbynonmagnetic/insulatingbarrier.
Excellentshieldingeffectonbusbarsduringshortcircuitconditions. ReducetheeffectofProximitybetweenphases. DesignedforIP55classofprotection.
Avoidsundesirableinducedcirculatingcurrentbeyondregularpath.
Noundesirablecurrentloopsandhencenoheatinginsupportingbeams.
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TypicalLayout
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Accessories
1. Enclosure2. Conductor3. Conductorsupport(Insulator)4. PhaseBarrier5. ConductorRigid&ExpansionJoints6. Grounding Conductor7. InspectionCover/Opening8. RubberBellow9. TerminationatEquipmentEnd10.Wallframeassemblywithseal ofbushing11.SpaceHeater&Marshaling Box12.FilterDrainPlug13.SupportingStructure
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StandardApplicable
IEEEC37.23/BS159/IS:8084
Test
TypeTest
Shorttimecurrentwithstandtest Impulsevoltagewithstandtest Temperaturerisetest
RoutineTest
Drypowerfrequencyvoltagewithstandtest Insulationresistancetest Continuityofauxiliarywiring Paintcoatingthicknessmeasurement WeldingXRaytest Dyepenetrationtest
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NonSegregatedPhaseBusduct
APPLICATION
Nonsegregatedphasebusductsaredesignedforuseoncircuitswhoseimportancerequires
greaterreliabilitythanpowercablesprovide.Typicalofsuchapplicationsarethe
connectionsfromtransformerstoswitchgearassembliesinunitsubstations,connections
fromswitchgearassembliestorotatingapparatus,andtieconnectionsbetweenswitchgear
assemblies.
Nonsegregatedphasebusductisanassemblyofbusconductorswithassociated
connections,jointsandinsulatingsupportsconfinedwithinametalenclosurewithout
interphasebarriers.
The
conductors
are
adequately
separated
and
insulated
from
each
other
and
grounded
byinsulatingbussupports.
RATINGS
0.415kVto3.3kV,Upto5000A&50/60Hz.
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Crosssectionview
TherearebasictwotypeofNSPB
ConventionalType(Outdoor/Indoor)Inconventionaltypeconductorsoragroupofconductorsforeach phaseareadjacentto
theotherphase.ConfigurationofconductorisR,Y,BorR,Y,B,N.
ConventionalType
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InterleavedType(Outdoor/Indoor)Interleavedarrangementofconductorsreducedthenonuniformityofcurrentdistribution
duetoskineffectandproximityeffectwhichdependonthedistancebetweenconductors.
Interleavedofferslower&balancedimpedancewhichbecomeimportantforlongbusduct
wherevoltagedropiscritical.
InterleavedType
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SalientFeatures
3Ph3wireor3Ph4wirelowvoltageBusduct. Commonmetallicenclosurewithnophasesegregation. ConductorsupportedwithFRP/Epoxy/SMC/Polyamideinsulators. MostlyFlatAl/Cuconductorareused. DesignedforIP55classofprotection ForOutdoorcanopytypeenclosure.
TypicalLayout
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Accessories
1. Enclosure2. Conductor3. Conductorsupport(Insulator)4. ConductorRigid&ExpansionJoints5. GroundingConductor6. InspectionCover/Opening7. RubberBellow8. TerminationatEquipmentEnd9. WallframeassemblywithsealofPlate/bushing10.SpaceHeater&Marshaling Box11.FilterDrainPlug12.SupportingStructure
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StandardApplicable
IEC604391andIEC604392/IS:8623
Test
TypeTest
Shorttimecurrentwithstandtest Temperaturerisetest
RoutineTest
Drypowerfrequencyvoltagewithstandtest Insulationresistancetest Continuityofauxiliarywiring Paintcoatingthicknessmeasurement WeldingXRaytest Dyepenetrationtest
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