part d: technical specification of eot crane · 4.01.01 the safe working load (x) for each eot...

Odisha Power Generation Corporation Ltd.

Technical Specification for WorkshopPackage

IB TPS – 2 X 660 MW Units 3 & 4, Jharsuguda, Odisha

MANTRA UDYOG

(TECH SPC FOR EOT-PART -D)

PARTD:TECHNICALSPECIFICATIONOFEOTCRANE1.00.00GENERALINFORMATION

Thissectioncoverstheonenoof10TonnecapacityElectricOverheadTraveling(EOT)Cranes,whichwillberequiredforhandlingvariousworkshopequipmentsinnewworkshopbuildingofOPGC.EOTcraneshouldbeabletomoveinexistingandproposedworkshopcomplex.Hence,thecranebusbarneedstobeextendedtowardstheexistingworkshopsidealso.Sothelengthofthebusbarwillbeapproximately84mtr(48+36)

2.00.00CODESANDSTANDARDS The design, manufacture and testing of the crane shall conform to the latest

editionsofthefollowingcodesandstandards2.01.00 IS:807‐ CodeofPracticeforDesign,Manufacture,Erectionand

Testing(StructuralPortion)ofCranesandHoists.2.02.00IS:3177‐ Code of Practice for Design of Overhead Traveling Cranes and

GantryCranesotherthanSteelWorksCranes.2.03.00 IS:1835‐ RoundSteelWiresforRopes.2.04.00 IS:2266‐ SteelWireRopesforGeneralEngineeringPurposes.2.05.00 IS:3443‐ CraneRailSections.2.06.00 IS:15560‐PointHookwithShankupto160tones‐Specification.2.07.00 IS:5749‐ ForgedRamshornHooks.2.08.00 IS:816‐ CodeofPracticeforUseofMetalArcWeldingforGeneral

ConstructioninMildSteel.2.09.00 IS:1323‐ CodeofPracticeforOxy‐AcetyleneWeldingforStructuralWorkin

MildSteel.2.10.00 IS:9595‐ Recommendations for metal arc welding of carbon &

carbon‐manganesesteel.2.11.00 All electrical installation work shall comply with the provisions of Indian

ElectricityActandIndianElectricityRulesasamendeduptodate.




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2.12.00 ANSI‐830.2.0‐SafetycodesforoverheadandGantryCranes.2.13.00 IS3815:PointhookwithshanksforgeneralEngineeringpurpose. 2.14.00 IS823:Codeofpracticeforuseofmetalarcweldingofmildsteel.2.15.00 IS 1181: Qualifying tests formetal arcwelders (Engaged inwelding structure

otherthanpipe).2.16.00 CMNA‐CranemanufacturesassociationofAmerica. Incaseofanycontradictionbetweentheabove‐mentionedcodesandstandards

(item2.01.00thru'2.16.00above)andthistechnicalspecification,thelaterwillprevail.However,nothinginthisspecificationshallbeconstruedtorelievetheSeller of his responsibility to comply with what is mentioned against item2.11.00above.

3.00.00SCOPEOFWORK3.01.00Scopeofworkincludessupplyofthefollowing:3.01.01Theoneno.of10tonnesE.O.Tcranesashavingdutyandserviceconditionsasspecified

hereinafteralongwithallaccessories.3.01.02Runwayrails forentirerunwaylengthalongwithrailclamps,all inserts, insertplates,

anchorbolts,nuts,buffers&stops,limitswitchesetc.asrequired.3.01.03Runwayconductorsfortheentirerunwaylengthcompletewithallinsulators,supports,

supportbrackets, fixing clamps,bolts,nutsetc. as specified andas required tocomplete the installation. Power supply cabling including isolating switchcompletealongwithelectricalitems,attachmentsandaccessoriesasrequiredtofeedpowertotherunwayconductor.

3.01.04Allprotectivedevices,anti‐collisionlimitswitchesetc.asrequiredforthecrane.3.01.05Allfacilities,accessoriesandattachmentsforoperationofthecranes.3.01.06Bridgeandtrolleycurrentcollectorsandbridgecrossconductorsalongwithallwirings

etc.forthecraneasspecifiedandasrequiredtocompletethescopeofwork.3.01.07Cranecomponentsshallbeprovidedwithliftinglugs,eye‐boltsetc.atsuitablelocations

forhandlingassembling,liftingandplacingintoposition.4.00.00SPECIFICPERFORMANCEREQUIREMENTS




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4.01.00Capacity4.01.01Thesafeworkingload(X)foreachEOTcraneshallbecomputedasX=1.25xawhere a=Singleheaviestequipmentexpectedtobehandledbythecrane.4.02.00HighestPosition4.02.01Thehighestpositionreachedbytheliftinghooksshouldbesuchthatduringoperation,

theminimumverticalcriticalclearancebetweenbottomoftheequipmentbeinghandledandthetopofanypermanentstructureorequipmentintheoperatingareashouldbeatleastonemetre.

4.03.00LowestPosition4.03.01The lifting hooks should reach up to the floor of its operating area or sump pits as

necessary.4.04.00Horizontalclearance4.04.01The lifting hooks in vertical position should reach at least up to 2.5 m from the end

stopper.

4.04.02 Eitherthemainortheauxiliaryhookinverticalpositionshouldreachatleastupto1.0mfromtherunwayrails.

4.05.00IfsafeandreliablehandlingnecessitatesmoreoperatingspacefortheE.O.T.cranes,the

sameshallbeprovided.5.00.00DESIGN&CONSTRUCTION5.01.00General5.01.01In thedesignof componentson thebasisof strength, factorof safetyshallnotbe less

than five (5) based on ultimate strength. Impact, fatigue, wear and stressconcentration factors shall be taken into account, wherever applicable.MechanismclassshallbeasindicatedintheDataSpecificationSheet.

5.01.02The crane shall be rigid in construction and all movements shall be smooth and

non‐jerky.




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5.01.03Drivesshallbedesignedwithadequatemargintogivebestperformanceandefficiency.Safety arrangements shall be incorporated to prevent damage to motors onaccountofmechanicaloverloadandelectrical faultsand togearing, shafts,etc.duetoover‐stressingandotherdetrimentalconditions.

5.01.04All materials shall be of tested quality and shall conform to the specificationrequirements and standardsmentioned and shall be new and first class in allrespects.

5.01.05Castings and forgings shall be of tested quality and shall conform to their respectivematerial specifications and shall be free from flaws and objectionableimperfections,machinedtrueandinaworkmanlikemanner.

5.01.06Nowoodorothercombustiblematerialshallbeusedunlessspecificallyapprovedbythe

Buyer/Consultant.5.01.07Proposals for repair or any similar operations involving plugging, welding, boring or

additionofmetal to theoriginal castingsor forgings shall be submitted to theBuyerandhisapprovalmustbeobtainedbeforeanysuchwork is carriedout.Drawingshowingdetailsand locationofsuchrepairsshallbesubmitted totheBuyer.

5.01.08Allfabricationbyweldingshallbecarriedoutbyqualifiedandcertifiedwelders.5.01.09Designshallprovide foreasymaintenanceofallparts,particularly thewheelbearings

onend‐trucks.5.01.10TemperatureEffects Where any portion of the structure is not free to expand or contract under

variationoftemperature,allowanceshallbekeptforstressresultingfromtheseconditions;theco‐efficientofexpansionforeachdegreecentigradevariationoftemperature above and below normal being taken as 0.000012 formild steel.Themaximum range of variation of temperature shall be as given in the LeadSpecification.Clause3.4ofSection3ofIS:800‐2007CodeofpracticeforuseofstructuralsteelinGeneralBuildingconstruction‐shallalsoapply.

5.01.11Maximumuseshallbemadeofshopfabricatedsub‐assemblies.5.01.12MaterialofConstruction Thematerial of constructionof themajor components of the crane shallbeas

indicatedintheDataSpecificationSheet.Manufacturersarehoweverfreetousealternativematerial,whicharesuperiorfortheintendedservice.ButinallcasestheyarerequiredtoobtainpriorconcurrenceofBuyerafterfurnishingchemicalandphysicalpropertiesof theofferedmaterial andanyother information thatmaybeaskedforbytheBuyer.




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5.01.13LoadIndication The crane bridge shall have permanent inscription in English on each side,

readilylegiblefromoperatingfloor,statingmanufacturer'sname,serialno.,theyearofmanufactureandthesafeworkingload.

5.02.00StructuralDesignConsideration5.02.01Minimumthicknessofmetal Forloadcarryingmembersthecomponentplates,bars,anglesandotherrolled

sectionsshallbeminimum8mmthick. For tubeshavingbothends sealed theminimum thickness shall be4.9mm(6

SWG).Forunsealedtubestheminimumthicknessshallbe8mm.Thechequeredplatesforplatformsshallbeminimum6mmthickoverplain.

5.02.02Accessibilityformaintenance All structural parts shall be designed so that they are accessible for periodic

cleaning, brushing and painting. All rivets/bolts shall also be accessible forperiodicchecking.

5.02.03Rulingdimensionsandratio a) Forcompressionmembers,theslendernessratioshallnotexceed120.In

case of other load carrying members and subsidiary members theslendernessratioshallnotexceed180.

b) Forgirders,thefollowingvaluesofmaximumspantodepthratioshallbe

governing: Plategirders : Span/depth=18 Latticegirders: Span/depth=125.02.04Connections

a) Unlessotherwisespecified,onlyrivettedorweldedjointsshallbeused.

b) Wherewelding isnotpracticable, turnedand fittedbolts shallbeused,

preferablyasperIS‐1364andIS‐1367.




MANTRA UDYOG


c) Minimumnumberofturnedandfittedboltsinaconnectionshallnotbelessthantwo.

d) Black bolts shall not be used inmain structures and high tensile bolts

shallnotbeusedunlessapprovedbytheBuyer.Boltsshallpreferablybenotusedintension.

e) Whereboltspass through sectionshaving tapered flanges, tapered flats

shall be welded to inside of the flanges. Tapered washers shall not beused.

f) Transversefilletweldsonloadcarryingmembersshallbeavoided.Ifsidefilletsareusedinendconnections,thelengthofeachsidefilletshouldnotbelessthantheedgedistancebetweenthefillets.

g) Buttweldsonstructuralmembersundertensilestressshallbechecked

byRadiographicexaminationasandwhendirectedbytheBuyer. h) Splices shall be designed to resist one and half times the forces and

moments to which it is subjected, but in no case it shall be less than2/3rdoftheeffectivestrengthofthematerialsplicedexceptthatsplicesinthewebsoftheplategirdersshallbedesignedforfullstrengthofthewebinshearaswellasbending.

Forsplicingtensionmembers,thenetsectionofthespliceplateshallbe

ten percent more than that of the material spliced. Splices shall beproportioned and arranged, so that the gravity axis of the splices is inlinewiththegravityaxisofthemembertoavoideccentricity.

5.02.05DeflectionsandCamber

a) Thetotalmaximumverticaldeflectionofthegirdersproducedby thedeadload,weightoftrolleyandtheratedloadshallnotexceedlimitof Span/900.

b) The girders shall be cambered by an amount equal to the maximum

deflectionduetodeadloadplusonehalftheliveloadandtrolley.5.03.00BridgeGirderandEndCarriage

5.03.01 Thecraneshallhavedoublegirder10TonnesSWL,andabovethatitshallhavedoublegirder.




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5.03.02 ThebridgegirdershallbeboxsectiontypeorbracedIbeamtypeasperstandarddesignofthemanufacturer.Theexteriorsurfaceshallbesmoothandasfreefromprojectionsetc.aspossibletominimisedustcollectiononit.

5.03.03double girder cranes shall be providedwith suitable truss for supporting the bridge

drivemachineryandmotor.5.03.04 The crane bridge shall be carried on end trucks of suitable design. Each end

truck shall be built up fromsteel plateswelded together to forma closedboxsectionwith opening at each end to receive thewheels.Welded to the trucksshallbesteelsectionstoformbearingsforthewheelaxlesandthedrivingshaft.End trucks shall be providedwith rail sweep and bumper. They shall also beprovidedwithsuitablejackingpadsformaintenanceofthewheelandbearings.The locationofthejackingpadsshallbesuchthat itwillnot interferewiththemaintenanceofthewheelsanditsbearing.

5.03.05 Drivingwheelsshallbeof thedouble flangeand taper tread typeandshallbe

groundtoequaldiameterinpairs.Wheelaxlesmaybeeitherofthestationaryorrotatingtypeasperstandardofthemanufacturer.Ifstationarytype,theyshallbepreventedfromturninginthetruckbymeansofakeyplatefittingintoaslotintheendoftheaxleandifrotatingtype,wheelsshallbekeyedtothem.

5.03.06 Wheremorethantwobridgewheelsareusedperendtruck,theendtruckshallbesplitintotwosections,eachcarryingonebridgeindependentofother.Twosectionsoftheendtruckshallbejoinedbysuitablejoiningdevicethatwillensureuniformwheelloading.Steelpadsshallbeweldedonthetopofendtruckswherethegirderrestsandshallbemachinedtoreceivethegirderends.

5.03.07 Trolleytravelrailendsshallbecurvedupwardstostopthetrolleysmoothlyandpreventitfromleavingtherailsincaseofovertravelatitsmaximumspeed.

5.03.08End trucks shall be equipped with spring/rubber buffers and rail sweep for bridge

travel.Therailsweepshallbesuchthatitcanpushawayanyobjectthatmayfallon the runway. The buffers shall be of substantial design and suitable forengagingthestopsattheendofrunway.

5.03.09Breathingholesshallbeprovidedincompletelyenclosedweldedboxtypegirders.Drain

holesshallbeprovidedinallplaceswherewateroroilislikelytocollect.Wherepracticable,meansofaccessshallbeprovidedforinsideinspectionofcompletelyenclosedboxgirders.




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5.03.10Inbridgegirderstrengthcalculations,thetrolleyrailsandchequeredplatesshallnotbe

consideredasloadcarryingmembers.5.04.00TrolleyFrame5.04.01The trolley frame shall be built up from heavy steel plates, angles and channels

adequatelybracedtoresistvertical,lateralandtorsionalstrains,weldedtoformarigidonepieceframe.Alternatively,itmaybeofcaststeelconstruction.

On bottom of trolley frame, on each side shall be a double spring bumper to

engagestopsateachendofthebridge.

5.04.02 Equalizersheavesshallbemountedonthetrolleyframeinsuchamannerthatdeflectionresultingfromtheforceonthesheavesisnotdirectlytransmittedtothehoistingmechanism.

5.04.03 Sheavesshallbesoarrangedonthetrolleythatrope‐revvingarrangementresultingtherefromwillensurealiftingoftheloadinalmostaverticallinewithminimumofswingorsidemovement.

5.05.00PlatformsandLadders

5.05.01 Safemeansofaccessshallbeprovidedtotheoperator'scabandtoeveryplacewhereanypersonengagedintheexaminationormaintenanceofthecranehastowork.Adequatehandholdsandfootholdsshallbeprovidedasnecessary.

5.05.02 Onemetrehighdoubletierhandrailandsuitabletoe‐boardsshallbeprovidedalongtheentirelengthofplatform(onthebridge),whichshallnotbelessthan750mmwide.

5.05.03Everyplatformsshallbeprovidedwithsteelchequeredplatetopandbesecurelyfenced

withonemetrehighdoubletierhandrailsandtoeboards.Platformsshallbeofsufficientwidthtoenablenormalmaintenanceworktobeundertakensafely.

5.05.04Notused,.5.05.05Access to operator's cabin from bridge girder platform shall be by staircase having

adequatewidthandpropersloping.5.06.00Operation The crane shall be operated or from a pendant control station as specified in

DataSpecificationSheet.




MANTRA UDYOG


5.06.02PendantStation a) The pendant station shall locate the push buttons for controlling the

variousmotionsofthecraneandshallbehungfromthecranetrolleytoaheightofapproximately1metreabovetheoperatingfloor.

b) Withpendantoperation,footoperatedbridgetravelbrakeandthe drumcontrollersneednotbeprovided.

5.07.00RepairCage

5.07.01 Arepaircageshallbeprovidedontheinsideoftheendcarriageforattendingthemaincurrentcollectors.Incase,thetrolleycurrentcollectorsarelocatedbelowtrolleyraillevelontheinsidewebsofthebridgegirders,guardsshallbeprovidedonthetrolleytopreventthehoistingropesfromcomingincontactwithconductorsaswellasarepaircageshallbeprovidedonthetrolleytoattendtheseconductors.5.07.02 Repaircagesshallalsobeprovidedatthecornersofthecrane,ifrequired,tofacilitateremovalandreplacementoflongtravelwheels.

5.07.03Therepaircagesshallbeadequatelysized,guardedforsafetyandcorrectlylocatedfor

theintendedservice.Suitableaccesstothecagesshallbeprovided.5.08.00LiftingHookBlockAssembly The liftinghookblockassembly shall be ramshorn typeor approvedequal for

capacitygreaterthan40Tonnesandpointhookwithshankforcapacitybelow40Tonnesandshall beof steel construction.Eachhookshallbe supportedonballorrollerthrustbearingandshallrotatefreelyonitsbearings.

Thesheavesofthehookblockshallbeencasedinanoiltightcasingpermitting

generous lubricationofwireropesandsheavesandalsopreventingaccidentaltappingofhands.

Allsharpedgesonthehooksshallbeeliminatedtopreventdamagetothesling

ropes.ThehooksshallconformtotherequirementsofIS:3177.5.09.00Gearing5.09.01Gears in the speed reducer unit for bridge drive and also all hoists and trolley drive

gearingshallbeenclosedinsubstantialhousingandshalloperateinoilbath.Theoilshallhaveadditivesofapprovedqualityandshallbeofapprovedviscosityatstandardtemperature(say60ºC).Thehousingshallbeofsufficientdesignnotto




MANTRA UDYOG


permitatemperatureinexcessof90ºCfortheoilbathandshallbeadequatelysupportedandreadilyremovablewithoutdisturbingthegearassembly.

5.09.02Gears shall be of cast or forged steel and pinions shall be forged steel and shall be

machinecut.Gearandpinionteethshallbetreatedforresistancetowear.5.09.03GearsshallhavetoothformandmodulesasrecommendedinIS‐3681andtheyshallbe

adequately designed to stand shock load and vibration and shall not beexcessivelynoisyinoperation.TheratingsofgearsshallbeestablishedasperIS:4460.

5.09.04Spurandhelicalgearsonlyshallbeusedforreductiongearing.5.09.05Mountingofthegearsshallbesuchthataxialthrustonthebearingisminimum.Centre

distanceoftheconnectingshaftsshallbeascloseaspossibletothetheoreticalvalue. Shafts shall be designed to keep their deflections within permissiblelimits.

5.10.00Bearing5.10.01The type of bearings for various parts shall be as per IS‐3177 and standard of

manufacturer.5.10.02Provisionshallbemadeforservice lubricationofallbearings.Bearingenclosuresshall

be designed as far as practicable to exclude dirt and prevent leakage of oil orgrease.ArrangementforcentralizedlubricationofbearingsshallbetriedtothemaximumextentpossibleandadetailedschemeforthesameshallbefurnishedbySeller.

5.10.03Suitable drip pans shall be provided as required to collect oil and grease, whichmaydrop, from operating parts. All drip pans shall be accessible for draining andcleaning.

5.10.04Allbearingsofthegearingshallbeantifrictiontype.Angularcontactballortaperroller

bearings shallbeusedwherevernecessary.Thebearings shall correctly locatetheshaftswhileallowingforthermalexpansionoftheshafts.

Bearings shall be enclosed in suitable housingwith proper holes and plugs to

preventanyingressofdirtandtopermiteasylubricationofthebearings.5.11.00Guarding5.11.01Guardsofanapproveddesign,whichwillpushforwardoroff therail trackanyobject

placedacrossit,suchasperson'sfootorarm,shallbeattachedtoeachendoftheendcarriage.

5.11.02Protectionguardstoliveelectricalwirings/conductorsshallbeprovided.

1




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5.11.03Suitableguardstorevolvingshaftsandcoupling,longtravelcrossshaftsandgears,shall

beprovided.5.11.04The sheaves of the hook block fitted with two sheaves or fewer shall be guarded to

preventtappingofahandbetweenasheaveandtherunningrope.5.11.05Effectivemeansof guiding thewire ropesover the sheaves shallbeprovidedsoas to

preventdismountingof rope from the sheave groovesevenwhena slack ropeconditionisdeveloped.

5.11.06All openings in footwalk flooring, for access to bottom chord platform, if any, and tootherinspectionplatforms,shallbeprovidedwithcovershavingsuitablelockingmeanstoavoidanyaccidentalopening.

5.11.07Allelectricalpanels,resistanceboxesshallhavesuitablerain/dusthoodsoverthemto

prevent water and building construction material falling on them, as it isapprehended that erection and commissioning of the crane might have to betakenupbeforecompletionofthebuildingroof.

5.12.00RunwayRails5.12.01Cranerunwayrailswithboltsandnutsandcompletewithshims,anchorbolts, inserts

andotherfixturesforfixingtherailstocranegirdersshallbeunderthescopeofsupplyofthepresentspecification.

5.12.02Thelengthof therailsuppliedshallbesufficient tocoverthewholeofrunway length.Gap between successive rails shall not exceed 2 mm and end rails shall beprovidedwithstopperstopreventlongitudinalshifting.

5.12.03TherailsectionshallbeasperIS:3443.5.13.00TrolleyRail5.13.01The specification includes the supply of trolley travel rails completewith fixtures for

fixingtherailstothebodyofcrane.5.13.02Thelengthoftherailsuppliedshallbeadequateformaximumpermissibletrolleytravel.

Gap between successive rails shall not exceed 2 mm and end rails shall beprovidedwithstopperstopreventlongitudinalshifting.

5.14.00RailJointsandFixing5.14.01Therailsshallbebuttjointedbyeitherthermitweldingorfusionweldingprocess.The

Sellershallgethisproposalforedge‐preparationofrails,weldingprocedureandsequence,approvedinadvancebytheBuyer/Consultant.




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5.14.02The schemes of securing the rails to the gantry girder/bridge structurewith clamps,bolts and nuts, their alignment etc. shall be subject to the approval of theBuyer/Consultant.

5.15.00Tolerances The limits of tolerance as specified in the Data Specification Sheet shall be

observed.5.16.00RailEndStops Railendstopsofadequatedesignshallbeprovidedonbothendsoftherunway.

Theendstoplocationandarrangementshallbesuchthattheunavailablelengthofrunway(forcraneoperation)onanyendisaminimum.

5.17.00DriveMechanism5.17.01Equaldrivingeffortshallbeappliedateachdrivewheelofbridgeandtrolleytoprevent

oneendfromtravellingfasterthantheother.5.17.02Forbridge,thetorsionaldeflectioninthecrossshaftshallbelimitedtosafevalueasper

applicablecode.5.17.03Forbridgedrive,themotorshallbelocatedatmidpositionofthespan.Iftwinmotors

are used for drive, motors shall be equidistantly located at each wheel end.Suitable interlock shall be provided to prevent single motor operation at anytime.

5.17.04Trolleydriveshallbeachievedbysinglemotorinwhichthemotorshalldriveacommon

outputshaftthroughpropergearboxandtractivepowershallbetransmittedtothe geared wheels by means of pinions mounted on both ends of the outputshaft.

5.17.05All machineries for the drive unit shall be properly aligned. Self‐aligning type gear

couplingsshallbeusedbetweenconnectionshaftstotakecareoftransverseaswellasaxialmovementwherevernecessary.

Wherevercomponentsofconsiderableamountofinertiaisdirectlymountedon

the high‐speed shaft (e.g. brake drum, couplings, etc.) they shall be balancedstaticallytominimisevibration.

5.17.06Motor ratings shall be calculated keepingmargin of at least 25% over themaximum

powerrequirement.Further,thehoistmotorsshallberatedtolift120%ofthedesign load on the hook at the rated speed. For other details the Clause no.5.19.00belowshallbereferredto.




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5.17.07 AlongwiththedrivemechanismsadequatebrakesshallbeprovidedasdetailedinClauseno.5.20.00below.Selectionanddesignofbrakesshallbecompleteresponsibilityofthemanufacturer.Thebrakesshallbeofaccurateratingtostopeachmotionwithinaveryshortdistanceandinasafeandsmoothmanner.

5.18.00CraneElectricals5.18.01Thecrane(s)shallbefurnishedcompletewithallelectricalequipment,accessories(like

drivemotorswithVVVFDrives, conductors, insulators, protective& operatingdevices,cables,currentcollectorsetc.)andcabling/wiringasmaybenecessaryfortheefficientandsafeoperationofthecrane.

5.18.02The crane electricals shall be designed for satisfactory operation from the available

powersupplyasgivenintheDataSpecificationSheet.5.18.03Ifpowersupplyotherthanthatspecifiedisrequired,theSellershallhavetomakehisown

arrangement by furnishing all necessary conversion, rectification andtransformationequipmentandaccessories.

5.18.04 Unlessotherwisespecified,thecraneelectricalsshallbedesignedforambientair

temperatureof50ºCrelativehumidityof100%andsiteelevationlessthan1000metresabovemeansealevel.

5.18.05Allelectricalequipment,accessoriesandwiringshallhavetropicalprotectioninvolving

specialtreatmentofinsulationandmetalagainstfungus,insectsandcorrosion.5.18.06All electrical equipment shall be laid out so that they are readily accessible for

inspectionandmaintenance.5.18.07 Thehoiststructures,motor frames&metalcomesofallelectricalequipmenton

EOTcrane/hoistshallbeeffectivelygroundedasperIndianElectricityRules.5.18.08 Ifthependentcontrolisofmetal,itshallbeearthed.5.18.09 All equipment offered shall have suitable provisions for termination and

connectionofBuyer’spowerandcontrol cable inclusiveof cable endbox,brasscompression glands terminal lugs and terminals. Incoming switch‐fuse shall beprovidedateachpanelforincomingAC/DCpowersupplies.

5.19.00DriveMotors5.19.01Allcranemotorsshallbetotallyenclosed,fancooledtype,havingclass‐Finsulationwith

temperatureriselimitedtoclass‐Boperationinallcases.5.19.02MotorenclosuresshallconformtothedegreeofprotectionIP‐55.




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5.19.03 Motors shall be Squirrel Cage type, designed for crane duty requirement of

frequentstarting.ReversingandpluggingmotorsofsinglegirderEOTcraneshallalsobesquirrelcagetype.AllmotorsshallbesuitableforVVVFoperation.

5.19.04 MotorsshallsuitthedutyclassS4,cyclicdurationfactor(CDF)40%andnumber

ofcyclesperhour150.Motorpullout torqueshallnotbe less than2.75 timesratedtorque.

5.19.05 Themotor shall be capable of operating satisfactorily at full load for 5minutes

withoutinjuriousheatingwith75%ratedvoltageatmotorterminals.Motorshallnotstallduringoperationatvoltagedipof70%for2sec.

5.19.06 Themotorshallbedesignedtowithstand120%ofratedspeed for twominutes

withoutanymechanicaldamage.5.19.07 Startingcurrentshallnotexceed6timesfullloadcurrent.5.19.08 The motor shall be capable of withstanding the stresses imposed if started at

110%ratedvoltage.5.19.09 Motor shall start with rated load and accelerate to full speed with 80% rated

voltageatmotorterminals.5.19.10 Thestartingtorquedevelopedbymotoratminimumpermissiblevoltageatstarti.

e. 80% of rated voltage shall be more than the starting torque requirement ofdrivenequipmentbymarginofat least10%throughouttherangeofstarting inorder toaccount forhigherstarting torquerequiredduringservicedue towearandtear.

5.19.11Motorsshallbesuitableforbothforwardandreverserotation.5.19.12 Motor subject to reverse rotation shall be designed to withstand the stresses

encounteredwhenstartingwithnon‐energisedshaftrotatingat125%ratedspeedinreversedirection.

5.19.13 Themotor shall start smoothly and rapidly andmaintain steadyoperation. The

motorcharacteristicsuchasspeed,startingtorque,accelerationtimeetc.shallbeproperly coordinated with requirement of driven equipment. Maximum torqueshallnotgenerallybebelow200%offullloadtorque.

5.19.14 Breakaway torque andpullout torque shall beproperly coordinatedwith speed

torquecharacteristicofthedrivenequipment.Thetorquespeedcharacteristicofmotor super imposed thereon, driven equipment torque speed characteristic at




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100%, 90%, 80% and 110% of rated voltage shall be furnished to establishcapabilitytostartthemotorsuccessfullywithloadconnected.

5.19.15 Thelockedrotorwithstandtimeunderhotconditionat110%ratedvoltageshall

bemore thanmotor starting time by at least 3.0 seconds formotors up to 20secondsstartingtime.

5.19.16 Starting timementionedabove isatminimumpermissiblevoltageof80%rated

voltage.5.19.17 Hotthermalwithstandcurveshallhaveamarginoratleast10%overthefullload

currentofthemotortopermitrelaysettingutilisingmotorratedcapacity.5.19.18 Eachmotorrated30KWandaboveshallbeprovidedwithspaceheater,sizedto

maintainmotorinternaltemperatureabovedewpointwhenthemotorisidle.5.20.00Brakes Selection and design of brakes shall be such as to meet the following

requirements:5.20.01ServiceBrake a) Double‐shoetypeservicebrakesshallbeprovidedforeachmotionofthe

craneanditshoists.Theservicebrakesshallapplyautomaticallywhenpowersupplytothedrivemotoriscut‐offorfails.

b) Servicebrakesformainhoistmotionshallbeelectro‐hydraulicthrustortype,foralldoublegirdercraneseithercabinorpendantoperatedandelectromagneticdisc.typeforsinglegirdercrane;adequatelysizedtoarrestmotionandholdatrestanyloaduptoandincludingtestloadatanypositionofthelift.

5.21.00MainDisconnectSwitch5.21.01Maindisconnectswitchshallbemetal‐clad,3‐pole, load‐breaktypeinIP‐54enclosure,

completewithcompressionbrassglandsandlugs.5.21.02Theswitchshallbeprovidedwith"PowerOn"redindicationlamp(LEDtype)andshall

besuitablylocatedsothatitcanbemanuallyoperatedfromtheoperatingfloorlevel.

5.21.03Powerleadsshallrunfromthemaindisconnectswitchtotherunwayconductors.5.22.00RunwayConductors(DownShopLeads)




MANTRA UDYOG


5.22.01Therunwayconductorsshallbefour(4)innumberforthreephasesupplyandground.5.22.02TherunwayconductorsshallbeofM.S.anglesections,liberallysizedsoasnottoexceed

current density of 0.42 Amps/sq.mm. Alternatively, shrouded bus bar withcoppertypeDSLmaybeused.

5.22.03Sufficient allowance (minimum 20%) for wear and tear shall be provided over the

calculatedconductorsize.

5.22.04 Therunwayconductorsshallbesupportedonbracketsandinsulatorsfromthecranegirderwithsufficientspacinginbetweentheconductors.

5.22.05Thecollectorsystemperconductorshallbetop‐runningtypehavingspringloadedcast

iron/carbonmetallicshoestomaintainadequatecontactpressure.5.23.00Cross‐ConductorsonBridge5.23.01Crossconductorsonbridgeshallbeflexibletrailingcablesystemmountedonretracting

supports(festoontype).5.23.02Alternatively cross conductors of M.S. angles with shoe collectors, similar to the

arrangementofrunwayconductorsmaybeoffered.5.24.00PowerDistributionEquipment5.24.01From the main collector shoes, wiring shall be extended to two (2) nos., 3‐pole,

load‐break,safetydisconnectswitches‐oneatthebridgenearthecollectorandtheotherinoperator'scabinwithineasyreach.

5.24.02The safety switches shall be capable of cutting‐off the supply to all power driven and

associatedequipmentofthecranebutnottheauxiliaryloadssuchasfans,lightsetc.

5.24.03 From the safety disconnect switches, wiring shall be extended to a protective

panel,containingthefollowingasaminimum: a) Onetriplepoleincomingsupplydisconnectswitch. b) OnetriplepolemainmagneticcontactorwithHRCfusebackup,ON‐OFF

pushbuttonsandRED‐GREENindicationlamps(LEDtype).




MANTRA UDYOG


c) Motorfeeders,eachcomprisingoftriplepolefuseswitchunitwiththermaloverload(handreset)relaysforshortcircuitandoverloadprotectioninallthreephasesofthemotor.

d) Outgoing feederswithdouble‐pole switch fuseunits forauxiliary loads

suchascontrolsupply,lights,fans,etc.withatleastonesparefeeder.5.25.00VoltageDrop5.25.01All conductors and cables/wires shall be so sized that the voltage drop measured

betweenthemaindisconnectswitchandmotorterminalsshallnotexceed3%ofratedvoltage.

5.25.02 Thevoltagedropshallbecomputedusingthetotalrunningcurrentofallcranemotorsthatcanoperatesimultaneouslyandwithratedcraneload.

5.26.00SafetyInterlocks5.26.01DisconnectSwitch a) The operating handle of the main/ safety disconnect switch shall be

mechanically interlockedwith enclosure cover such that the same cannotbeopenedunlesstheswitchisinOFFposition.

b) Main/ safety disconnect switch shall have provision of pad‐locking in

OFFposition.5.26.02MainContactors a) The main contactor shall be electrically interlocked so that it cannot

closeunlessallthemotoroverloadrelaysareRESETandallcontrollersareinOFFposition.

b) Themaincontactorshallbealsoopenedbymeansofemergencypushbuttonsandhoistlimitswitches.

5.27.00EmergencySwitch MushroomtypeemergencySTOPpushbuttonstoopenthemaincontactorshall

befurnished‐atleastoneinoperator'scabinandtwoonbridgeplatformwithineasyreach.

5.28.00CraneControls




MANTRA UDYOG


TheVVVFDrivecontrolshallbeusedforcontrolofeachmotion.TheVVVFdriveshallbeprovidedwithsteplessspeedcontrolfrom0to100%.TheVVVFDriveshallbeequippedatleastwith1024Pulseincard,droopcontrolforsynchronizationandcranesoftware.TheratingofVVVFshallbedecidedconsidering250%offullloadcurrentofrespectivedrivemotor. TheVVVFdriveshallbesuitableforcontinuousoperation.Forlongtravel,motorshallbegroupedintwogroupsandoneVVVFdriveforeachgroupshallbeconsidered.

5.29.00Controllers5.29.01 Mastercontrollersforallmotionsshallbesoarrangedintheoperator's

cabinastoprovidemaximumconvenienceandviewoftheoperator.5.29.02AllcontrollersshallbeprovidedwithspringreturntoOFFpositionfeature.WheninOFF

position,thecontrollershalldisconnectpowersupplytotherespectivemotor.5.29.03 Eachcontrollershallbearsuitablyengravedinscriptionofmotions

controlledinEnglishandofdirectionofmotionsbyarrows.5.30.00 LimitSwitches5.30.01 ThelimitswitchesshallbetotallyenclosedtypeIP‐55withproperly

designedactuatorsandshallbereadilyaccessibleforadjustmentandrepair.

5.30.02Eachhoistshallbefurnishedwithtwo(2)limitswitches:

a) Ascrewtypelimitswitchwithself‐resettingfeatures,whichwillactincaseofover‐hoisting.

b) Agravityoperatedhand‐resettypelimitswitchasaback‐upprotection

againstover‐hoisting.5.30.03Track type limit switchesshallbeprovidedon thebridgeand trolley topreventover‐

travelingineitherdirection.5.31.00Panels




MANTRA UDYOG


5.31.01 ProtectiveandcontrolpanelsshallhaveIP‐54gasketedenclosure,fabricatedfromsheetsteel,minimum2mmthick,suitablyreinforcedtoprovidestructuralrigidity.

5.31.02Thepanelsshallbefrontconnectedtypewithfronthingeddoorforaccesstowiringand

terminals.Engravednameplatesshallbefurnishedforallpanelsandalsofortheequipmentanddevicemountedthereon.

5.31.03Allpanelsshallbefactorywiredandterminatedonsuitableterminalblocksforexternal

cableconnection.Allinternalwiringshallbeidentifiedwithnumberingferrulesat both ends as per relevantwiring diagram. Terminal blocks shall have 20%spareterminals.

5.31.04Control wiring shall be carried out with 1100 Volt grade flexible, heat resistant,

insulated switchboard wires with minimum 2.5 sq.mm stranded copperconductor.

5.31.05 Incomingswitch‐fuseshallbeprovidedateachpanelforincomingAC/DCpower

supplies.5.31.06 EachpanelshallhaveinternalilluminationwithLEDlampandthermostat

controlledspaceheater,suitableforoperationon240V1‐ph50Hzsupply.LampsandheatercircuitsshallhaveindividualON‐OFFswitches.

5.32.00Switch5.32.01 Allswitchesshallbehandoperated,airbreak,heavyduty,quick

make‐quickbreaktype,capableofsafelybreakingthefullloadcurrentofconnectedmotor/feeder.

5.32.02 Incomingsupplydisconnectswitchshallbeinterlockedwithpaneldoor

sothatthesamecannotbeopenedunlesstheswitchisinOFFposition.Devicetodefeatthisinterlockshallalsobeincluded.

5.33.00Fuse5.33.01AllfusesshallbeofHRCcartridgetype,mountedonplug‐infusebaseandprovidedwith

visibleoperationindicator.

5.33.02 Allaccessiblelivepartsshallbeadequatelyshroudedsoastoeliminatethedangerofaccidentalcontactswithlivepartswhilechangingthefuse.

5.34.00Contactors




MANTRA UDYOG


5.34.01 Contactorshallbesuitableforcraneduty,withcurrentratingnotlessthanconnectedmotorfullloadcurrent.Allreversingcontactorsshallbemechanicallyandelectricallyinterlocked.

5.34.02Contactors shallhave facility for easy inspectionand replacementofparts.Arc chutes

shallbeprovidedwherenecessary.5.34.03Each contactor shall be provided with three positive acting, ambient temperature

compensated,thermaloverloadrelayswithadjustablesettingstosuitthemotorcurrent.

5.34.04 Therelaysshallbehandresettype,suitableforresettingwith

compartmentdoorclosed.5.35.00PushButtonandLamp5.35.01 Pushbuttonshallbespringreturntype,with2NO+2NCcontacts,rated

10A240VA.C.5.35.02 IndicatinglampsshallbeLEDtypewithseriesresistor.Lampsandlens

shallbereplaceablefromfront.5.36.00Illumination5.36.01 Cranelightingandspaceheatingsystemsshallbedesignedfor240V1ph

50Hzsupplyandreceptaclesystem24V1ph50Hzsupply.Suitabledrytypetransformersshallbefurnishedforthepurpose,completewithisolationfacilityandprimary/secondaryfuses.

5.36.02Thelightingdistributionboardshallbelocatedintheoperator'scabin.Branchcircuits

forlightingandreceptaclesshallbeindividuallyprotectedbyswitchfuseunits.5.36.0340WLEDfixturesshallbeusedforlightingoperator'scabinandbridgeplatform.Four

(4)250Whigh‐bay sodiumvapour fixtures shall beprovidedbelowbridge forilluminationoftheworkingzones.

5.36.04All lighting fixtures shallbemountedwithanti‐vibrationmountingandshallbeeasily

accessibleformaintenance.5.36.0524V‐5A‐3pinindustrialsocketoutletsshallbeprovided–two(2)inoperator'scabin

andminimumfour(4)onthebridgealongthewalkway.5.36.06One(1)portable40Whandlampwithplugshallbefurnishedwithadequate lengthof

flexiblecableforinspectionofcranecomponents.




MANTRA UDYOG


5.36.07Operator'scabinshallbeprovidedwithone(1)electricfan.

5.36.08 One(1)heavy‐dutytypeindustrialsirenshallbeprovidedwitheachcrane.Thesirenshallbeoperatedfromfoot‐switchintheoperator’scabin.

5.36.09Conduitwiringsystemshallbeusedforlightingcircuits.5.37.00Wiring5.37.01All power, control and auxiliary circuitwiring shall be furnished and installed as per

best installationpractice.Thedesignshallbe suchas tomaximise shopwiringandminimisefieldwiring.

5.37.02Allwiringshallbedonewith1100VgradePVCinsulatedwireinconduitsorby1100V

gradePVCcableswithextrudedinnersheath.5.37.03 Conductorsshallbestrandedaluminiumforpowerandstrandedcopper

forcontrol.Minimumconductorsizeshallbenotlessthan2.5sq.mmcopperorequivalent.Forselectingthecablerating,motorduty,ambienttemperature,grouping,positionofcables,voltagedropetc.shallbeconsidered.

5.37.04Conduits shall be heavy gauge, rigid steel, hot‐dip galvanised, cut square, reamed,

threadedandscrewedtightatall joints.Conduitentrytopullboxorenclosureshall havedouble locknuts and insulatingbushing.No running thread shall beused.

5.37.05Solderlessconnectorsshallbeusedforallconnections.Nosplicesshallbepermittedin

wireorcable.Notapsorconnectionsshallbemadeinfittingsorjunctionboxes.5.37.06Allwiresandcablesshallbeidentifiedwithpermanentmarkersatterminationsasper

approvedwiringdiagram.5.38.00Grounding5.38.01Thecrane rails, structures,motor frames,metalenclosuresofallelectricalequipment,

conduitandtraysystemshallbeeffectivelygroundedinaccordancewithIndianElectricityRules.

5.38.02Bondingofstructuresandcranerailsshallbeprovidedasrequiredtoensureelectrical

continuity.5.38.03Thecranegroundingsystemshallbeconnectedtostationgroundmat.




MANTRA UDYOG


6.00.00INSPECTIONANDTESTING6.01.00 The Seller shall submit his Shop and Field Quality Plan for OPGC review and

approvalasperstipulationsofVolumeIIAofthisspecification.TheQualityPlanshall indicateall the tests tobe carriedout in linewith the relevant codes.Allforgings and castings shall be subjected to ultrasonic examination. DPT/MPIshallbecarriedoutwhere‐evernecessary.

6.02.00Testsatshop6.02.01The cranes shall be subject to no load, full load and overload tests as per IS‐3177.

Otherwise the crane shall be subject to 'no‐load' test after complete assemblyandwiring.

6.02.02ThecraneshallbesubjecttodeflectiontestasperIS:3177.6.02.03If the hoisting drum offered is of welded construction, the seams shall be fully

radiographed.6.02.04Theinspectionandtestingofbuttweldedjointsshallbeperformedinaccordancewith

theprovisionsoftherelevantIndianStandardsorotherequivalents.Butweldedjointssubjecttodirecttensionshallbe100%radiographed.All'T'jointsshallbecoveredwithspotradiography.Shouldanyofthespotsbefounddefectivethenradiographytobeextendedto100%area.

6.02.05Allelectricalequipmentandcomponentsthereofshallbesubjecttoroutinetestsasper

relevantIndianStandards.Typetestcertificateonanyelectricalequipmentshallbe submitted if desired by the Buyer. Otherwise, type tests shall have to beperformedontheequipmenttoprovethedesign.

6.02.06Reports of all shop tests shall be submitted to the Buyer/Consulting Consultant for

review.6.03.00Testsatsite6.03.01 Afterassemblyanderectionatsite,thecraneshallbesubjecttothe

followingtests: a) AlltestsasperIS‐3177,includinginsulationtestandtestsforoperation. b) DeflectiontestsasperIS‐3177 c) Overloadtestsat125%ofworkingloadasperIS‐3177




MANTRA UDYOG


6.03.02 Deadloadsasrequiredforconductingthetestsatsiteshallhavetobe

arrangedbytheSellerathisowncost.

7.00.00DRAWINGS,DATAANDINFORMATION7.01.00 The following drawings and data shall be submitted for review of Buyer/

ConsultantbytheSeller.7.01.01Drawings showing general arrangement, clearance requirement, assembly, cross

sectionaldataandmaterialsofconstructionfor: a) E.O.T.CraneUnit b) BridgeAssemblyandComponents c) BridgeEndTrucksandWheelAssembly d) Trolley e) TrolleyWheelAssembly f) Drive and Transmission Unit for Bridge Travel, Trolley Travel, Main

HoistandAuxiliaryHoist. g) SuspensionUnitforMainHookBlockandAuxiliaryHookBlock. h) MainHookBlock i) AuxiliaryHookBlock7.01.02Drawing showing layout of controllers and protective panels inside the operator’s

cabin/pendantstation.7.01.03 Leafletsonproprietaryitemssuchasmotors,brakes,gearbox,couplingetc.7.01.04Designcalculationofthefollowing: Bridge girder, Rope drum, Machinery shafts, Gear box, Motor rating, Brake

capacity,Bearinglife,Wheelloadingetc.7.01.05Drawings,characteristicscurvesandotherdataforeachdrivemotor.7.01.06Materialtestcertificatesforallitemsincludinghooksandwirerope.




MANTRA UDYOG


7.01.07Reportsonvarioustestsatshopandatsite.7.01.08Controlandprotectionschemealongwithcranewiringdrawingaswellasaschematic

drawing of control wiring indicating ratings and specifications for motors,contactors,resistors,fuses,etc.

7.01.09Asbuiltdrawing/electricalcontrolschematic.7.02.00InstructionManual7.02.01 TheInstructionmanualsshallpresentthefollowingbasiccategoriesof

informationinacomprehensivemannerpreparedforusebyoperatingand/ormaintenancepersonnel:

i) Instructionforerection ii) Instruction for pre‐commissioning check up, operation, abnormal

conditions,maintenance,repairandprotection. iii) Adetailwriteuponthecranecontrolsystemandalsoontheinterlocks

provided. iv) Recommendedinspectionpointsandperiodsofinspection. v) Scheduleofpreventivemaintenance. vi) Replaceablepart'slistwithorderinginformation.

vii) Recommendationfortypeoflubricants,lubricatingpoints,frequencyoflubricationandlubricantchangingschedule.

viii)GA&Cross‐sectionaldrawingwithBOM

viii) Manualforallboughtoutitems




MANTRA UDYOG


DATASPECIFICATIONSHEET

GENERALINFORMATION

Location :AsperAnnexureI.Workingcondition :Indoor

GUARANTEEDPERFORMANCEREQUIRED

Capacity:(Safeworkingload) a) MainHoist(T) :10Tonnes. b) Aux.Hoist(T) :5Tonnes.RatedSpeed : (foranyloadfromzerotoSWL) Mainhoist :3m/min. Aux.hoist :5m/min. Trolleytravel :15m/min. Bridgetravel :25m/min. Creepspeed :0.3m/min Rangeofspeedcontrol formainandauxiliary hoisteachmotions 0to100%of (foranyloadfrom corresponding zerotoSWL) ratedspeed.




MANTRA UDYOG


Note:Safeworkingloadshallbe125%ofweightoftheheaviestequipmenttobelifted.




MANTRA UDYOG


SCOPEOFSUPPLY

Cranestructurescomplete : YesAlldrivemotorsanddrivinggears : YesRunningrailsincludingallclamps,anchors,bolts,nuts,sheams,inserts,endstopsandotherfixtures : YesOperator'sCabin : NoPendantStation: YesPortablefireextinguisher/CO2bottleinoperator'scabin : NotapplicableRunwayconductors(DSL)andpowercollectorscompletewithallsupports,insulators,brackets,fixturesetc. : YesCompleteelectricalworkincludingmaindisconnectswitch,allcontrolsandinterlocks,withnecessarywiring,grounding,protectivepanelsetc. : YesLowerlimitswitchesforhoists : YesIlluminationofcrane . : YesFaninoperator'scabin : NotApplicableLiftinglugs,eyeboltsetc.forhandlingofcraneparts : YesErectionandcommissioningservice : Yes,SupervisionbyCraneManufacturerAllequipment,accessoriesandconsumablesrequiredforerection,testingandcommissioning : Yes

1

1




MANTRA UDYOG


Finalpainting : YesFirstchargeofoil,lubricants,greaseetc. : Yes

DESIGNANDCONSTRUCTION

DutyClass : Mechanismclass ‐ M5asperIS‐3177andIS‐807 ElectricalServiceclass ‐ 4asperIS‐3177Operation : Pendantstationforallcranes No.ofTrolleys : OneSpanbetweenrunwayrailcentres : } }Netrunwaylength : } }Elevationoftopofrunwayrails : }TobedecidedbytheSeller. }Elevationofbottomofbuilding }roofstructures : }Mainhookpositions‐a) Elevation ‐ Highest : } ‐ Lowest : } }b) Minimumapproachfromrunway } railcentrelines : } }c) Minimumendapproachfrom } runwayrailstops : } }Auxiliaryhookpositions‐ }TobedecidedbytheSellerasper }guidelinesofthespecification.a) Elevation ‐ Highest : } ‐ Lowest : } }b) Min.approachfromrunwayrail } centrelines : }




MANTRA UDYOG


}c) Min.approachfromrunway } railstops : } }Clearspacebetweenrunwayrail }centrelineandnearestsideobstruction/wall }Runwayconductors‐a) Material : Asspecifiedearlierb) Maximumallowablecurrentdensity : Sellertoindicate.

DESIGNANDCONSTRUCTION

EndTrucka) I‐Sectionacceptable : Nob) Singleflangedwheelsacceptable : NoPermissibletolerance‐a) Differenceinlevelsofcranerailtop measuredbetweentwoadjacentcolumns : 2.0mmb) Cranerailgauge : +_ 3.0mmc) Relativeshiftofendsofadjacentrailsinplan andelevationafterwelding : 1.0mmd) Deviationofcranerailaxisfromcentreline ofwebofsupportinggirder : +_ 3.0mmScheduleofBrakesHoldingtorqueforcontrolbrakeshallbe150%ofratedtorqueandthatofservicebrakeshallbe150%Thescheduleofbrakesshallbeasunder:




MANTRA UDYOG


Sl.No. Service Type&No.1. MainHoist Two(2)nos.Electrohydraulicthrustertypebrake.2. AuxiliaryHoist Two(2)nos.Electrohydraulicthrustertypebrake.3. CrossTraverse Two(2)nos.Electrohydraulicthrustertypebrake..4. LongTraverse Two(2)nos.Electrohydraulicthrustertypebrake.. Two(2)nos.Hydraulicthruster(footoperated)The aforesaid brake schedule is applicable for double girder either cabin or pendent operatedcrane. Foot operated hydraulic thruster type brake need not be provided for pendant stationoperated cranes. For single girder cranes and single girder under slung cranes, one (1)electromagneticdiscbrakeforeachmotionshallbeprovided.

MATERIALOFCONSTRUCTION

Bridgegirder : IS‐2062Gr.B.Otherstructuralmembers : IS‐2062Gr.B.Liftinghooks : Steel (Main hook as per IS‐5749 and

Aux.hookasperIS‐15560).Sheaves : ForgedSteel.

Drum : Seamless pipe to ASTM A106 or

fabricatedrolledsectiontoIS‐2062.Gr.B

Wireropes : AsperIS‐2266.(UshaMartinMake)Gear : CastorForgedSteel(EN‐9).Pinion : Castalloysteel(EN‐24).




MANTRA UDYOG


FinalInspectionAfterAssemblyatShopandSite

FinalAssembly : Visual,DimensionalandAlignmentCheckPerformanceTest : a)NoLoadTest b)SafeWorkingLoadTest(SWL) c)OverloadTest(125%ofSWL) d)Idleruntestforwheelsforlongtravelmotion e)Specificspeedforallmotion f)DeflectionTest g)ElectricalFailSafeTest h)OthertestsasperIS:3177Identification : Marking&StampingPainting : Surface Preparation, Final Finish andPaintDFT

VerificationofDocuments : AsperapprovedMQP&FQPNote:Contractor shall submitMQP&FQPofCrane forOPGC reviewand

approval.

Listofvendors

Crane : AnupamIndustries,Electromech,Greaves,Century

Crane, REWA, WMI

Motors : Marathon,BBL,CGL,Siemens,VVVFDrive : Siemens, Schneider, ABB, Alstom,

YokogawaWireRopes : UshaMartin




MANTRA UDYOG


GearedBrakeMotor : Siemens (Flender), SEW, Bongfiglioli,

NORDBrakes : SOC, Electromag, Kakku, BCH,Magco

ControlBearing :SKF,FAG,TIMKEN,TATA,NBCContactors/MCCB/MCB/FUSES :Siemens,L&T,Telemechanic,ABB/OverloadRelays/IsolatorsPushButton :Siemens,L&T,Telemechanic,Cable :KEI,Finnolex,Polycab,UniversalLimitSwitch :Siemens,BCH,EPCC(KAKKU)TimeRelay : SiemensNote: Any deviation from the above list shall be subjected to OPGC

approval.