电机员面试机舱电器基本知识汇总Word格式文档下载.docx
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电机员面试机舱电器基本知识汇总Word格式文档下载.docx
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EMERGENCYSWITCHBOARD
IndentifyallmachineriesfedfromEmergencypowersupplyinMSB:
-No.2steeringgear
-No.3E/Rfan
-No.1radar
-Bosunstorelightingtransformer
-EmergencyA/C110transformer
SINOCREWMARITIMESERVICESPTELTD
SafetyinterlockstorunEmergencygeneratorwhileMSBisalive:
-WhentheMSBisalive,toruntheemergencygeneratorthebustieswitchwillgivea
signalthattheE/Gcouldnotputonload.
-NVR
Power
AIRCIRCUITBREAKER
RoutineCheck,Maintenance&
Interval:
-Avisualexaminationofcircuitbreakersinmain,emergencyandsectionboardswillusuallyprecedeoperationaltests.Thesurveyorwillparticularlychecktheconditionofmainarcingandauxiliarycontactsforsignsthewear,misalignmentandoverheating.Asimilarinspectionoffixedandmovingisolatorcontactsattherearofacircuitbreakerwillbemade.
Arcchutesmustbeclean,freeofarcdebrisandcorrectlyaligned.Allinternalwiringshouldbei
ALTERNATORS
ExplainbrieflythetypeandworkingprincipleoftheDieselGeneratorsonboard
-Thedieselgenerators’speedisaccuratelymanagedbyanelectronicfuelgovernor
whichmaintainsanalmostconstantoutputfrequencyoveritsloadrange
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Explainbrieflythetypeandworkingprincipleoftheshaftgeneratoronboard
-Apropulsion-shaftdrivengeneratorcanbeanefficientmethodforextractingelectricpowerfromtheship’smainengineasthepowerisderivedfromlowercostfuelthanthatusedforanauxiliarydrivengeneratorunit.Theshaftgeneratormaybefitteddirectlyin-linewiththeslowspeedpropulsionshaftor,morecommonly,isgear-drivenuptoahigherspeed.
Also,byusingashaftgeneratorasthemainsourceofelectricpowerduringlongseapassages,thedrivengeneratorunitsoperateforshortperiodsonlywithareducedmaintenancerequirement.
Anapparentdisadvantageofashaftgeneratoristhatithasnodirectfrequencycontrolasthisisdeterminedbythemainenginewhichissetfortheshipsfull-wayspeedrange.Themeansthatthefrequencymustbeseparatelyregulatedatthe
outputoftheshaftgeneratortomaintainaconstant60HZtotheship’selectricpowerconsumers.
MOTORS
Detailedproceduresoncompleteoverhaul,withprecautions:
-Feeduptheelectricalisolationcertificate
Switchoffthepowerandremovethecontrolfuse,tomakesuretheoverhaulmotorpoweriscutoff.Andmakeanoticetomakesurethatoverhaultimenobodyoperatorit.
Disconnecttheconnectionandchecktheinsulation,afterthatremoverotorandcheckthebearingifthebearingnogoodtakeout.Cleanalltheequipmentsandchecktheinsulationofcoilside,andspringthevarnish,andputtheheatlamptodry
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itandchecktheinsulation.Afterdryupputbacktherotorandtowsidecover,checkthemotortomakethemotorisingoodcondition.Thenputbackthemotorintooriginalplaceandputbackthecontrolfuseandswitchonthepowerandtestrun.
INSULATIONMEASUREMENT
NecessityofInsulationcheckonequipments
-Onboardtheshipameasurementoftheinsulationresistancegivesoneofthebestguidestothestateofhealthofelectricalequipment.Theresistanceshouldbemeasuredbetweeninsulatedconductorsandearth,andbetweenconductors.
Values&
EvaluationofReadings:
BestwhenNew
-100MΩ~500MΩ
Acceptableinservice
-1MΩ
Notacceptabletoputinservice
-Lessthan1MΩ
WhathappenifoperatedwithunacceptedlevelofInsulation?
-Itcanbedamagetheinstrumentorelectricalcontrol.
NecessityofInsulationcheckonCablesandlightfittings:
-Tomakesureanycablesshortcircuitorshortedtoearth.
4
WINDLESSANDWINCH
Safetyinterlocksincorporatedinstarterpanel,Providelogicdiagram
-Overloadinterlock
-Oilpressurehigh
-Oiltemperaturehigh
Themoter
Overload
Thewinch
isrunning
trip
systemwill
stop
Oilpressure
The
high
hydralic
pumpwill
Oil
Thehydraulic
temperture
pumpwillstop
STEERINGGEARSYSTEM
Listoutvarioussafetyinterlocksincorporatedinsystem
-Phasefailinterlock
-Overcurrentrelay
-RudderMAX.anglelimitswitch
-HYD.Oillevelswitch.
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PROVISIONCRANE
Checkbeforearrivalport,toensurecorrectoperation:
-Checkallthelimitswitchhanderfreeornot,checkallthelimitswitchisgoodworkingornot.
-Checktheremotecontroller
-Checkthecontrolpanel
-Checkthemotorsinsulation
GANGWAY&
MOTOR
Checkbeforearrivalport,toensurecorrectoperation:
Nameallsafetyinterlocksandtrips:
-Uplimitinterlock-Inlimitinterlock–emergencystop–Twosideschangeover
interlock
-Overloadtrip
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HEELINGANDBALLASTCONTROLPANEL
UnderstandHeelingandBallastControlsystemandassociatedcircuits-
Theheelingandballastcontrolpanelisintheshipoffice.Onthiscontrolpanelwecanoperatetheheelingandballastpumpmotortoincreaseordecreasethewaterintheballastwatertanktokeeptheshipstayinginbalanceduringchargingordischargingcargosinportorsailingatsea,andpumpoutthebilgeofthecargoholdsonboardifthebilgelevelwashigh,orthealarmsactivated.
Circuit:
UPSANDSTORAGEBATTERY
UPSoperationandchargingarrangement
-UPSisuseforsomeimportantsystem.WhenpowerbleakouttheUPSwillautomaticallygivesupplytothesesystem
-Therearethreetypeofcharge
1.normalcharge(normallychargeabove6hours)
2.Floatcharge(cancontinuouslycharge)
3.Tricklecharge(2~3hours)
Careandmaintenanceofstoragebattery
-Checktheliquidleveliflowtopupwithdistilledwater
-Testtheelectrolytebythehydrometershowinggreenthenokifshowingwhiteneedtorechargeifredthenneedcheckthebatterystatus
Nametheequipmentswherestoragebatteryisused-Somealarmsystem
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-GMDSS&
Othernavigationequipment
Safetyprecautionrequirementinbatterystoragespace
-Wellvent.
-Preventexplodelight
-PreservePPE
-Emergencyeyewash
-Nonakedlight
GALLEYEQUIPMENTS
ListallelectricalequipmentsinstalledinGalley
-GalleyEXH.Fan-Disposer-Deepfatfryer
-Elec.Cookrange-Electricgriddle-Electricoven-Ricecooker-Dishwasher
Routinemaintenanceandinterval
-Galleyfanoverhaul
-Cookandcleansysteminsulationcheck
-Controlswitchcheck
-Mainpowerboxcircuitcheck
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WASHINGMACHINEANDDRYERROOM
-Everydaycheckthedrymachinefitter,andcleanit.
-Monthlycheckthewashingmachineanddrymachineinsulation.Checkthemachinesvibrationandtakecareofanyabnormalnoisefromthemachine.
ENGINEROOMEQUIPMENTS
MGPS
ExplainfunctionandoperationofMGPS
-MGPSisdesignedtopreventthemarinegrowthsfromsettlinginthevitalcomponentsofvesselsuchascondenser,pipingorpumpbychlorinecompoundwhichisproducedwhentheseawateriselectrolyzed.
ELEVATOR
Understandvariousinterlocksonelevator
-Escapedooropen:
whenthedoorisopentheelevatorwillautomatictrip.
-Dooropen:
everydeckelevatordoorkeepopen,theelevatorwillstop.Likeweusespecialkeytoopenanydeckdoortheelevatorwillstopatthattime.-Overload:
ifthemotoroverloadthebreakwilltrip.
-Weightoverlimit:
iftoomanypeopleinsidetheelevatororcarrytoomuchthingstheelevatorwillnotwork,keepstop.
-Uplimit:
iftheelevatorgoingupandcannotstopontopofthewellthereisalimitswitchtostopit.
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SINOCREWMARITIMESERVICESPTELTD-Downlimit:
likeuplimit.
-Overspeed:
iftheelevatorworkingandthespeedisoverlimitthentheelevatorwillstopautomatic.
STEERINGGARESYSTEM
PURIFIERS
Workingprincipleandassociatedcircuits
-ThepurifiersisthesystemforpurifythefueloilortheLUB.Oil.Beforeuse.Itseparatethesludgeandwaterfromtheoilbythespecificgravityfromthebowl.Thendischargethesludgeandwaterbytheo
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- 关 键 词:
- 电机 面试 机舱 电器 基本知识 汇总
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