Simrad ST90 - Connecting the 3-Phase AC Power to the Motor Control Unit

442703/B
265
Connectingthe3-phaseACpowertotheMotorControlUnit
Theelectrichoistingmotoronthehullunitrequires3-phaseACpowerforoperation.
TheACpowerisconnectedtoterminalblockE301insidetheMotorControlUnit.
Prerequisites
•TheST90isturnedoff.
•Thecircuitbreakerforthe3-phase
ACpowerisdisengaged.
•Allcableconnectionsaremade.
Youmustbeequippedwitha
standardsetoftools.Thistoolset
mustcomprisethenormaltoolsfor
electronicandelectromechanical
tasks.Thisincludesdifferent
screwdrivertypes,pliers,spanners,
acablestripper,asolderingiron,etc.
Eachtoolmustbeprovidedinvarious
sizes.Werecommendthatalltools
aredemagnetizedtoprotectyour
equipment.Thefollowingspecic
instrumentisrequiredforthistask:
•Multimeter
Context
TerminalblockE301islocatedatthebottomoftheMotorControlUnit.ThethreeAC
mainspowercables,aswellasground,areconnectedfromtheship’scircuitbreakers
toE301.
WARNING
Highvoltagesareused.Thisequipmentmustbeservicedonlybyqualied
personnelfamiliarwithhigh-voltageequipmentandthepotentialhazards
involved.Failuretoobservethisprecautioncouldresultinbodilyinjury.
Thefollowingrequirementmustbemet:
•The3-phaseACpowercablehasbeencorrectlyconnectedtoterminalblockE301.
•Theappliedvoltageismeasured.
•Thereleasecurrentisadjusted.
Procedure
1LocatetheMotorProtectingSwitch(S301).SettheswitchtopositionOFF.
2LocateHoist/LowerSwitch(S302).CheckthattheswitchisinpositionSTOP.
Settingtowork