Withdrawable or Fixed-Pattern? Here’s what you should know ...* For both sizes height 2400mm...
Transcript of Withdrawable or Fixed-Pattern? Here’s what you should know ...* For both sizes height 2400mm...
Here’s what you should know about BCH Drawout MCC
• BCHmakeDrawoutMotorControlCentreisafree-standingandfloormountingtypeswitchboardavailablebothinsinglefrontanddoublefrontversions,suitableforindoorinstallation.
• Eachverticalpanelisdividedintodistinctzonesforpowerbusbars,controlbusbars,feeders,powerterminalandauxiliarycontactwiring.
• Horizontalbusbars(HBB)arelocatedatthetopofthepanels.ThephasesequenceisR-Y-B-N.Wherethenumberofbarsperphaseexceedsone, theHBB is split into two / threepacketsperphase. ThephasesequenceisR1-Y1-B1-R2-Y2-B2-Nfortwopackets.
• Thedroppersarelocatedbehindtheunitfeedercompartmentandisolatedfromtheunitfeedercompartmentwithaninsulatingbarrier.Thephasesequence,asseenfromfrontlefttoright,isR-Y-B-N.
• The incomingpower contacts are locatedon the Left hand side,while theoutgoingpower contacts arelocatedontherighthandside.
• Thestarterunitinthefullydrawoutversionhasthefollowingpositions:• Service(connected)position.• Testposition.• Isolated(disconnected)position.
• TheService(connected)/Test/Isolated(disconnected)positionsareindicatedbySTIlocatorpin,mountedonthetrolleyandtheidentificationstickerpastedonthebottomseparationplate.
• Selfdisconnecting,pull-apart,plugandsocket type10waycontrol contacts, i.e. theSecondary IsolatingContacts(SICs)aremountedinbackofthetrolleyunit.
• Tofacilitatetransportation,theMCCissplitintomultiplesections.EachsectioniswrappedinanHDPEcoverandpackedinawoodencase.
GENERAL ARRANGEMENT AND DIFFERENT DESIGN FEATURES
Withdrawable or Fixed-Pattern?Comparedtofixed-patternassemblies,withdrawable/DrawoutMCCprovide:
• Greaterstackingdensities• Easierupgradeswhenincorporatingnewequipment.• Compartmentsthatcanbeinterchangedsafelyandquickly,reducingbreakdowntimeinprocessindustries.• Clear,visibleindicationfordisconnectedcompartments,givingincreasedsafetyforoperators.
Standard module dimension is :Single Front: 900(w)x2400(h)x600(d)mm
Double Front: 900(w)x2400(h)x1200(d)mm
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* For both sizes height 2400mm includes 100mm high base frame / plinth.
* The component mounting compartment has a width of 600mm and the outgoing cable alley width is 300mm, thus making the single vertical panel width of 900mm.
Boththeabovedesignsincorporatethesamedesignofwithdrawablemodules,busbarsystemandprincipleof100%modularconstruction.
Removable liftinganglesareprovidedon the top. IP-54 ingressprotection is retainedwithangles removed.The foundation channels and lifting angles run full length of the transportable unit.Maximumwidth of thetransportableunitislimitedto1800mm.
Sheetthicknessis2mmforallloadbearingmembers.AllDoorsandCoversareprovidedwithspecialaluminumextrudedhingeandcompressivejointlessPUFoamgasket.
Metal Treatment :RigorousmetaltreatmentandsurfacecoatingisprovidedtothesheetmetalcomponentsusedinconstructionofMCC.ThismakestheMCCsuitableforoperationinhighambienttemperature,humidityandtropicalatmosphericconditions.
Afullyautomatictentanksprayingprocessisusedformetaltreatment.Thistreatmentfollowedbyelectrostaticcoatingofepoxybasedpowderpaintwhichiscuredinacontinuousconveryorisedoven.Thepowdercoatedfilmthusensuresanon-poroussurfaceandprovidesuperiorresistanceagainstscratchingcorrosionandweathering.
BCHstandardpaintshadeforMCCisRAL-7035structurefinish.
DrawoutTrolleycomponentsarezincelectroplated.
The automated powder coating process flow chart:
Material from shop Loading of components Knockoff Degreasing
Activation Water Rinsing 1 and 2 Degreasing
Zinc Phosphating Water Rinsing 3 and 4 DM Water Rinsing
Powder Coating Material Dry off Oven Fresh DM Water Rinsing
Powder Baking Oven Unloading and up keeping
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Busbar System:Superiorityofmaterial,designandconstructioncombinetoprovideanexceptionallystrongandfault-immune-busbarsystemintheMCC.
Busbarsarefabricatedfromaluminum(E91EasperIS5082)orelectrolyticgradecopperconformingtoIS1897,aspercustomerpreference.
Busbarsupportsaremouldedfromthermosettingfiberglassreinforcedpolyestermaterialhavinghighimpactand tensile strength, high tracking index, properties of high temperaturewithstand and fire retardant, highinsulationbreakdownvoltage.
Foreachphase(standardcross-section:40x10mmaluminum)doubleverticalbusbarareprovided.
Horizontalbusbarstrengthisensuredbyedgewisemountingofbusbarsinfingersupports.
Cabling Space:Bothtypes(single/doublefront)ofMCCenclosuresaredesignedforgreatercablingconvenience.
Bottomentry isavailableasstandardinbothmodelswith liberalopeningsforcables.Topentrycanalsobeprovided,asanoption.
Horizontalbusbarsarealwayslocatedatthetopirrespectiveofcableentrydirection.
Terminalsforexternalpower/controlconnectionsareaccessiblewithmoduletrolleyinposition.
Thewidecablealleymakesbendingandterminationofcableseasy.
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Module Space:Theheightavailable forcompartments ineachvertical is1800mmor18spaceunits (SU)of100mmeach.Compartmentheight isextensibleinmultiplesof100mm.Minimumcompartmentheightstartsfrom200mm(2SU)tomaximumupto800mm(8SU).
Drawout Units:Eachdrawoutmodule is an independent unitwith incomingandoutgoingpower stab-on contacts and selfdisconnectingcontrolslidingcontacts.
Thedrawoutunitismountedonprecisiontelescopicslidestoensuringalignmentandeasemovement.
Fullydrawoutmodulehasthreedistinctfunctionalpositions:
Service:Power&Controlcontactsengaged.
Test:Controlcircuitscanbetested.Powercontactsdisconnected.
Isolated:BothPowerandControlcontactsdisengaged.
Service Test Isolated OutforMaintenance
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Contacts:Allpowerandcontrolcontactsaresilverplated.Theyofferhighresistancetoabrasion,lowermVdrop,leadingtolowerwearandtearandlongerlifeofthecontacts.Thepowercontactsareadequatelyinsulated.
Moduleincomingpowercontactshavearatingof100,150&300Ampsandengagedirectlywithriserbarswhichareoftinplatedcopper.
Controlcontactsareselfdisconnecting,pull-apart,plugandsockettypewiththermalratingof25Amps.Thecontactsarefingertouchproof.Inisolatedpositionofmodule,thefixedsocketportionofcontrolcontactscansafelyremainlive.
Alloutgoingcontactmountingsarefloatingtypewithuniqueselfaligningandpositivematingfeatures.
Contactshousingsaremadeoffiberglassreinforcedthermosettingmaterialforadequatethermalandmechanicalstrength.
PowerOutgoingContact ControlContact PowerIn-comingContact
Short-Circuit Strength:Busbartestedforshortcircuitwithstandcapacity50KAfor1sec.–notonlyforthephasesbutforneutraltoo.Designensuresthatbusbarinsulationremainshealthyaftersustainingeachfaultofthismagnitudeoccurringatpeakloadoperatingcondition.
BusbarsanddroppersareprovidedwithheatshrunkPVCsleeving.Theheatcuringprocessensuresnovoidsorpinholes.Exceptatthetap-offsandstab-incontactplates,thebusbarsarecompletelycoveredwithinsulatingmaterial. Sleeving also protects busbars against accidental contacts with hardware, tools and vermin. Jointshroudsareprovidedtocovertap-offsandfish-platejoints.Thusshortcircuitsbetweenphaseandneutralorearthisvirtuallyeliminatedinthebuszone.TheheatshrunkPVCsleevingisprovidedinadditiontothelargeclearancesinthebusbarzone.
Busbar Supports:Thebusbarsupportsaremoulded fromfiberglass reinforced thermosettingplastic.Thismaterialhashighermechanical strength compared to conventional support material. Ribbed construction of moulded supportspreventstrackingcausedbydustaccumulation.
FRPsupportforBusbarDropper FingerSupportForHor.Busbar
SAFETY AND MAINTENANCE FEATURES
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Fixed Safety Barrier:FixedtypehighqualityFR4FRPgradebarrierbetweenverticalbusbarandtrolleyfeederwillprovide100%protectionagainstdirectcontactwithlivebusbars.
Earthing of Trolleys:Earthing of withdrawable modules in Service an and Testpositionsisensuredbyaspringloadedscrapingearthcontactonthemodulebarrier.
Silverplatedscrapingearthcontactoneachdrawoutmoduleis‘Make-first’and‘Break-last’type.
This arrangement ensures that not only adequately ratedearthing system is available under load conditions but alsoearth continuity ismaintainedwhen themodule isunder test(controlcircuitenergized)
Alldoorsareindividuallyearthed.
Mechanical Interlock System & STI Locator:Thecircuitbreakersareprovidedwithmechanicaldoorinterlockstopreventopeningofdoorwhentheunitisinenergizedcondition.
TheService(connected)/Test/Isolate(disconnected)positionsareindicatedbySTIlocatorpin,mountedbottomplateofthecompartmentandtheidentificationstickerpastedonthewithdrawableunit.
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Telescopic Rails & Racking Screw Offer:• Positiveguidance• Smoothmovementofthemodule• Perfectalignmentofcontacts• Theyeliminatetheneedtoremovethemoduleforroutinechecks/minormodifications.
Allidenticaldrawoutunitsarefullyinterchangeablethusminimisingdowntime.
Command Module or Control Plate:Indicatinglamps,pushbuttons,metersandselectorswitchesaremountedonacontrolplate.Thisplatecanbehingedoutforinspection/maintenanceoftheconnections.Onlythecontrolplateneedstobechangedincaseofchangeinspecifiedcontrolequipment.
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TECHNICAL DATAInsulation 660volts,40-60Hz.
PowerCircuit Upto550voltsAC,3ph.50HZwithorwithoutNeutral.
ControlCircuit 110Volts,230Volts,oranyVoltageupto440VoltsACor220VoltsDC.
RatedCurrentAluminiumgradeE91EasperIS:5082&ElectrolyticgradeCopperBusbarsforcurrentratingupto6300amps.
ShortCircuitBusbarsystemdesignedfor50KArms/1sec,andStrength105KApeakfaultwithstandasperIS:8623andIEC:61439(TestedfromCPRI–Bhopal)
TemperatureRise Paneltestedfor800Ato4000AfromCPRIBhopalasperIS:8623andIEC:61439.
AmbientTemperature Standard450degreesCentigrade.
DegreeofProtection IP54asperIS13947-1andIEC:60529upto1600AandIP43beyond1600A.
BusbarSystem TP-EorTPN-E.
PanelHeight 2400mm,(including100mmHighplinth)
Panelwidth 900mm
Paneldepth 600mm,1200mm
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HIGHLIGHTS & SALIENT FEATURES oFBCH TECHNo-MoDULE DRAwoUT MCC
• Eachdrawoutmodulehasinterchangeabilitywithsamesizeoffeeder.
• ExtrastronghorizontalbusbarsystemusingrobustFRPsupports.
• CPRItestedforshortcircuitupto50KArms/1sec.
• Highwithstandsagainsteffectsofinternalarcingfaultswithoutendangeringoperatingpersonnel.
• FrontCablingversion,with300mmwidecablealley.
• 100%boltedfabricatedenclosurewithinternalhingesatalldoors,removableliftingangles.
• Modularconstructionallowingeasyextensibilityandsitemodification.Compactandvariedsizesofmodules.
• Precisiontelescopicslidesensuringhighdegreeofalignment.
• SafetyfeatureslikefixedFRPbarrier,scrapingearth,andfullycompartmentalizeddesign.
• Thesimilardrawoutunitsarefullyinterchangeable.
• Allpowerandcontrolcontacthousingsdesignedwithadequateshroudingandinterpolebarrierstoensurehighcreepagevalues.
• 22.5mmdiapushbuttonsandlightsenhancetheaestheticlook.
• Metaltreatmentwithfullyautomatictentankprocessfollowedbyelectrostaticcoatingofepoxybasedpowderpaint.
• Selfconnecting&disconnectingpowerandauxiliarycontacts.
• Drawoutmodulesarewithdrawablewiththreedistinctpositions–Service,Test,Isolate.
• Absolutelyflexible–progressive&lastminutedesignchangescanbeaccommodatedeasilywithlittleornocostimpact.
• Reliableearthingofwithdrawableunitsconsistentwithfeederrating.
• FlexibilitytopartitionthepanelusingseparationplatesinternalsegregationuptoForm4B
• Self-disconnecting,pull-apart,plugandsocket type10waycontrol contacts, i.e. theSecondary IsolatingContacts(SICs)aremountedinbackofthetrolleyunit.
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BCH Electric Limited, an ISO 14001:2015 and ISO 9001:2015 company, is
today one of the leading manufacturer of wide range of Industrial Enclosures.
It is wholly owned Indian company with a wide network of global connections.
BCH Electric, as always, remains committed to customer satisfaction & loyalty,
and will continue to broaden its portfolio with more services and products to
further strengthen its partnership with customers.
Our diversified enclosure product portfolio consists of IP-55, IP-66 welded
boxes both in mild steel as well as stainless steel, techno-modular enclosures,
compartmentalized enclosures up-to form-4B, 19 inch rack, telecom enclosures,
control desks, and in addition we can provide a customized enclosure solution
for almost every need to protect your system.
Our enclosures and panel solutions are brought to market by a sales and
service network spanning across the entire nation with over 50 branch offices
and resident engineer locations as well as over 500 active channel partners.