Owner's manual

- 7-

MCCB1:Moldcastcircuitbreaker
Mainpowerswitch

MCCB2:Moldcastcircuitbreaker
Maintenancebypassswitch.
PleaserememberthatMCCB2isusedonlyforservicetechnician.
Non‐maintenancepersonnelmustnotopenittouse,otherwise,AVRcouldbebreakdownbecauseof
improperoperating.

Onpushswitch(redbutton):
Controllingtheoutput(On)action.

Offpushswitch(greenbutton):
Controllingtheoutput(Off)action.

Off(0):AVRnoaction,sotheoutputhasnovoltagestabilityfunction.
On(1):AVRaction,sotheoutputvoltageissteady.

Voltageandcurrentindicator:(Thereisnovoltage&currentmeterindicationbelow50KVA).
Voltagemeter(V)indicatestheoutputvoltage.
Voltageselectorindicatesperphase(UVW)withNtheoutputvoltage.


6‐PreliminarywarningstousetheAVR

AutomaticVoltageRegulator(AVR)areusedtoprotectthesensitiveloadsfromtheunstablemainsand
toprovideproperoperatingoftheload.
Relatedpointsforhumanhealtharementionedin“SafetyWarnings”partofthismanual.
Inthispart,thesepointswillrepeatedtogiveinformationabouttheconnectionsofAVRandtheload.

•WheninstallingtheAVRtousecablewithimproperdiametercanbedangerousforuser
healthandsafetyoftheunit.

•Earthcableshouldbechosenconcerningthecurrentcapacity,whichiswrittenonthelabelon
thefrontpaneloftheAVR.Allunitsearthconnections,whichareconnectedtoAVR,should
bedonewiththisearthcable.Withoutearth,connectionorunprovedearthconnectedunits
aredangerousforuserhealthandhavehighriskofelectroniccircuitboardfaults.


Theoperationenvironmentandcableconnectionplaysveryimportantroletothe
functionofAVR.ItwillcauseverydirectandcriticaleffecttotheAVR’sMTBF.Therefore