
SimradSH90
Motorprotectingswitch(S301)
Topreventthehoistingmotorfromoverload,the3-phase
voltageforthemotorisfusedwiththecurrentadjustableMotor
ProtectingSwitchS301.ThisswitchislocatedinsidetheMotor
ControlUnit.
Themotorprotectingswitchwillautomaticallydisablehoisting
andlowering,if:
•thevessel’sspeedistoohigh
•thetransducershafthasbeenbent
•thelubricationreservoirontheHullUnitisempty
Figure55LocationofS301intheMotorControlUnit
HOIST STOP
REMOTE LOWER
(CD015409-030)
S301
ToresetmotorprotectingswitchS301,opentheMotorControl
Unit,locateS301andmovethehandleuptoON.
Dockingthevessel
Whendockingthevessel,greatcaremustbetakennottodamage
thesonartrunkandprotectingblister.
WARNING
Thesonarmustn e v e r bepoweredupwhenthe
shipisindrydock.Thetransducerwillbedamaged
ifittransmitsinopenair.Topreventinadvertent
useofthesonar,setthemainon/offswitchon
theProcessorUnittoO
f f ,ordisconnectthemains
power,wheneverthevesselisindrydock.
202
323775/B
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