Withdrawable or Fixed-Pattern? Here’s what you should know ...* For both sizes height 2400mm includes 100mm high base frame / plinth. * The component mounting compartment has a width

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

2 | www.bchindia.com

* 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

www.bchindia.com | 3

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.


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


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


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.


Telescopic Rails & Racking Screw Offer:• Positiveguidance• Smoothmovementofthemodule• Perfectalignmentofcontacts• Theyeliminatetheneedtoremovethemoduleforroutinechecks/minormodifications.

Allidenticaldrawoutunitsarefullyinterchangeablethusminimisingdowntime.

Command Module or Control Plate:Indicatinglamps,pushbuttons,metersandselectorswitchesaremountedonacontrolplate.Thisplatecanbehingedoutforinspection/maintenanceoftheconnections.Onlythecontrolplateneedstobechangedincaseofchangeinspecifiedcontrolequipment.


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


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.


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.

Documents

Withdrawable or Fixed-Pattern? Here’s what you should know ...* For both sizes height 2400mm includes 100mm high base frame / plinth. * The component mounting compartment has a width