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Erection Checklist for Solar Inverters, Solar Transformers & Solar String Combiner Box
6
O.K NOT O.K 1) MECHANICAL INSTALLATION a) Check the Sufficient free space around the unit b) Ensure the Drive cabinets are installed in safe dust free environment and the room should be enough to handle the required air circulation for the drives c) Check the frame, roof / canopy, component mounting plates, cable gland plates and side doors for any damages during transport / erection and should as per GA and IGA drawings d) Check the optional structure requirements such as anti-vibration pad, special hooking arrangements etc. if any e) Ensure the Lifting angles are removed. f) Check that the cabinet parts are clean and dust free. g) Check that each shipping section was erected with correct type of joining arrangements like side plates, channels, connecting bus bar (AC, DC and PE) etc. h) The ambient operating conditions are allowed i) The unit is properly fastened to the floor and wall k) The cooling air is able to flow freely and cooling air volume is sufficient 2) Bus bars a) Check visually that bus bar support insulators are undamaged. b) Check that all bus bar connections / joints are tightened. (Note that all bolts are tightened with correct torque are marked in factory before dispatch. Visual Checking of the mark is sufficient) c) Ensure sufficient clearance between bus bars after erection and ensure no foreign materials on busbars 3) Electrical components a) Check that the quantity, make, type and rating of components are as per BOM. Check visually that the components are not damaged b) Check that all the components are marked with visible labels. If any label missing please arrange the same c) Check that all modules are according to the BOM with correct option codes d) Check that any physical damages in the modules e) Check drive modules are mounted properly / inserted inside plug connectors securely for full contact with plug connector 4) ELECTRICAL INSTALLATION a) The inverter is grounded properly b) The AC line voltage matches the nominal output voltage of the inverter c) The AC transformer is suitable for use with the inverter d) The insulation of the assembly is sufficent e) The AC power system is an IT (ungrounded) system f) The AC power cable connections at L1,L2 and L3 and their tightening torques are OK g) The DC power cable connections at UDC+ and UDC- and their tightening torques are OK h) The power cables are routed away from other cables i) The auxiliary power supply cable connection at Q10 and their tightening torques are Ok CUSTOMER EQUIPMENT DETAILS SITE INVERTER ERECTION CHECK LIST SR NO CHECK POINT STATUS
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Transcript of Erection Checklist for Solar Inverters, Solar Transformers & Solar String Combiner Box
O.K NOT O.K
1) MECHANICALINSTALLATION
a) ChecktheSufficientfreespacearoundtheunit
b)EnsuretheDrivecabinetsareinstalledinsafedustfreeenvironmentandtheroomshouldbeenoughtohandletherequiredaircirculationforthedrives
c)
Check the frame, roof / canopy, component mounting plates, cable gland plates andside doors for any damages during transport / erection and should as per GA and IGAdrawings
d)Check the optional structure requirements such as anti-vibration pad, specialhookingarrangementsetc.ifany
e)EnsuretheLiftinganglesareremoved.
f)Checkthatthecabinetpartsarecleananddustfree.
g)Check that each shipping section was erected with correct type of joiningarrangementslikesideplates,channels,connectingbusbar(AC,DCandPE)etc.
h) Theambientoperatingconditionsareallowed
i) Theunitisproperlyfastenedtothefloorandwall
k) Thecoolingairisabletoflowfreelyandcoolingairvolumeissufficient
2)Busbars
a)Checkvisuallythatbusbarsupportinsulatorsareundamaged.
b)
Checkthatallbusbarconnections/jointsaretightened.(Notethatallboltsaretightenedwithcorrecttorquearemarkedinfactorybeforedispatch.VisualCheckingofthemarkissufficient)
c)Ensuresufficientclearancebetweenbusbarsaftererectionandensurenoforeignmaterialsonbusbars
3)Electricalcomponents
a)Checkthatthequantity,make,typeandratingofcomponentsareasperBOM.Checkvisuallythatthecomponentsarenotdamaged
b)Checkthatallthecomponentsaremarkedwithvisiblelabels.Ifanylabelmissingpleasearrangethesame
c)CheckthatallmodulesareaccordingtotheBOMwithcorrectoptioncodes
d)Checkthatanyphysicaldamagesinthemodules
e)Checkdrivemodulesaremountedproperly/insertedinsideplugconnectorssecurelyforfullcontactwithplugconnector
4)ELECTRICALINSTALLATION
a) Theinverterisgroundedproperly
b) TheAClinevoltagematchesthenominaloutputvoltageoftheinverter
c) TheACtransformerissuitableforusewiththeinverter
d) Theinsulationoftheassemblyissufficent
e) TheACpowersystemisanIT(ungrounded)system
f) TheACpowercableconnectionsatL1,L2andL3andtheirtighteningtorquesareOK
g)TheDCpowercableconnectionsatUDC+andUDC-andtheirtighteningtorquesareOK
h) Thepowercablesareroutedawayfromothercables
i)TheauxiliarypowersupplycableconnectionatQ10andtheirtighteningtorquesareOk
CUSTOMER
EQUIPMENT DETAILS
SITE
INVERTER ERECTION CHECK LIST
SR NOCHECK POINT
STATUS
k)TheexternalcontrolconnectionstotheinverterareOK(includingemergencystop,feildbusetc.)
l)Thecableconnectionsatthejunctionbox(option+K479)andtheirtighteningtorqueareOK
m) TheEMCfilter(option+E216)iscorrectlyinstalled,ifpresent
n)Therearenotools,foreignobjectsordustfromdrillinginsidethemodulesorthecabinet
o) Allshroudsandcoversareinplace
5)Cablingandwiring
a)
CheckthatField(Customerside)analogsignalcableslikePT100arewiredwithshieldedcable.Alsocheckthoseshieldsareproperlyearthedatoneend.EarthLoopshouldbeavoided
b)CheckthatallFieldcablesenoughinlengthandstressfree.ThecablesshouldbewithpropercableglandandtightenedwithGlandplate
c)
Checkthatallfiberopticcablesarenotdamaged,connectorsnottobebroken,notroutedagainstsharpedgesorbarelivepartsandbendingradiusoftheFOcablesisbiggerthan35mm.
d)Check,bygentlepullingthecables,thattheirconnectionstocomponentterminalsaretightenough
e)CheckthatshortlinksonTB’sandloopchainingaredoneaccordingtoscheme
6)EarthingandMechanicalOperatingTests
a)
Checkthatthepanelsaredualearthed.Weldingofearthbarswithpanelisnotrecommended.(PleasenotetheremaybeaseparatePowerandElectronicearthingpracticeinsomeplants)
b)Checkthefunctionalityofallswitchesbyclosingandopeningthem
c)Checkthatfusesareplacedtightlyinthemiddleofthefusesocket/fusebase.
d)Checkthatthedoorsforopenandclosewithoutrubbingornoisewhenopenandclose.
e)Checkthedoordefeatfunction.Whenfuseswitchordisconnectingswitchisclosed,thecabinetdoorcannotbeopened.
7) Start-UpPreparation
a)Makesurethatthepanelissafetoconnectvoltage
b)Keep all switches and breakers of the panel in OFF position and do the necessaryshortlinksifrequired
c)Ensure that nobody is working on the unit or circuits that are associated to the paneltobetestlikeinterpanels,shippingsection,motoretc.
d)Keepallcabinetdoorsinclosebeforepowerup
e)Ensureauxiliaryvoltagesavailableforbackchargingandcontroltesting
f) StatusofGridvoltageavailabilityandreadinessforenergising
g) Statusofpanelearthingandearthpits
h) StatusofDCpowerconnectionsreadiness
ConsultantEngineer
ClientEngineer
Acceptance Date
ContractorEngineer
O.K NOTO.K
1) AVAILABILITYOFDOCUMENTATION
a) ErectiondrawingsincludingOGA
b) Erection/MaintenanceManual
c) Transportpackinglist
2) RECEIPTOFTRANSFORMER
a) Externallyinspecteddamage(ifany)
b) Gaspressureonreceipt(Whereapplicable)
c) Oillevel(incaseofoilfilledtransformer)
d) Unitcorrectlypositioned
3) RECEIPTOFACCESSORIES
a) Allmaterialsstoredcorrectly
b) PackingCasesinspected,damageifany
c) Marshallingboxinspected,damageifany
d) Controlpanels(RTCC)inspecteddamageifany
e) MaterialsreceivedcorrespondedtoAdvisenote
f) Anyshortages/wrongsupply
g) Materialscomplywithshippingspecification
h) Remark(ifany)
4) ERECTION
a) Transportrollersmounted
b) Conservatormounted
c)Buchholzrelayandoilsurgerelaymounted(arrowmarkedshouldbetowardsconservator)
d) Breathermountedanddulycharged
e) HVBushingsmounted
f) LVBushingmounted
Sr.No. CheckPoint Status
TRANSFORMERERECTIONCHECKLIST
Customer:-
EquipmentDetails:-
Site:-
g) TertiaryBushingmounted(ifapplicable)
h) HVneutralBushingmounted
i) LVNeutralBushingmounted
j) Bushinginstalledatcorrectangles
k) Diaphragmchecked
l) MOLGmounted
m) Radiatormounted
n) Fansmounted
o) PressureReliefvalvesmounted
p) Alignmentofallpipework
q) OLTCConservatormounted
r) HeatExchangersassembledwithpipework
s) Toppingupoftransformeroil
t) Leakageobservedafter24hrs.(ifany)
u) RatingDiagramandidentificationplatefitted
v) Controlpanel(RTCC)aligned
w) Controlpanel(OLTC)aligned
4) OILFILLING
a) Allbushingoillevel
b) Tapchangerselectoroillevel
c) Diverterswitchoillevel
d) Auxiliaryunitoillevel
e) Radiator,Headersoilfilled
f) Transformer/OLTCConservatoroiltight
g) Completetransformeroiltight
h) Allairreleaseplugvented
i) Valvesinserviceposition
j) Alldrain/filtervalvesblanked
5) MULTICORECABLE
a) Alltrayworkadequatelysecured
b) Allcablesadequatelytied/clippedbacktotray
c) Cablesglanedcorrectly
6) BREATHERS
a) Transformersilicagelbreathersatisfactory
b) Tapchangersilicagelbreathersatisfactory
c) Drybreathercorrectlyinstalled
7) FANS
a) Fansrotatefreely&quickly
b) Pumpsinstalledforcorrect
c) Flowindicationvisible
8) CONTROLPANELS
a) Cabletermination&Glanning
9) Cleaningandtouchupofpainting
ConsultantEngineer
ClientEngineer
DateAcceptance
ContractorEngineer
O.K NOTO.K
1)SCBAssembly/Installation
a) MountingStructure'sverticality,alignment,GIcoating
b) CastingofmountingstructureandpilecapaboveG.L
c) ClerancebetweenbottomofSMBandG.L.
d) Overallvisualaspect(damages,Scratches)
e) BoxFixationandassembly
d) SCBallocation(IDVsallocation)
f) Cleaningoftheinteriorofthepanelbox
g) Labelling/NumerationofSCBasperdrawing
2)Equipment
a) InputNHIFusestatus(InputFuses)
b) SurgeArrestorFlag
c) DCswitchoperational
3)ElectricalConnections
a) GroundconnectivitytoGIstrip,cableandconnections
b) DCoutput,cableandconnections
c) Stringinput,cableandconnections
d) Glandtighting
e) Protectionagainstdirectcontact
f) Allconnectiontightness
g) CableLabelling(Inputs,Outputs,Auxiliary,communicationcables)
4)Documentation
a) SCB'sSLD&StringLayout
ClientEngineer
Acceptance Date
ContractorEngineer
ConsultantEngineer
Sr.No. CheckPoint Status
SCBERECTIONCHECKLISTCustomer:-
EquipmentDetails:-
Site:-
