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ID:38761096
大小:4.20 MB
页数:47页
时间:2019-06-19
《01 low-voltage》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Chapter2(PartB)TechnologyofElectricalControlinFactorySection1Low-voltageelectricapparatusSection2HowtoplotthecircuitdiagramSection3TheelectriccircuitformachineryPARTBTechnologyofElectricalControlinFactoryLow-voltageelectricapparatusSection1§2-1Low-voltageelec
2、tricapparatus1.Fundamentalsandintroduction2.ManualelectricapparatusSwitchFuseMasterelectricapparatus3.Automaticelectricapparatus4.ActuatorofelectriccontrolACcontactorTimerelayThermalrelayIntermediaterelayspeedrelay5.Summary1.Fundamentalsandintroduction1)Thecon
3、ceptofLow-voltageelectricapparatus2)ThetypesofLow-voltageelectricapparatus3)ThestructureofLow-voltageelectricapparatus4)Manualelectricapparatus5)Automaticapparatus1.Fundamentalsandintroduction1)TheconceptofLow-voltageelectricapparatus凡能根据外界控制信号,手动或自动地接通或断开电路,连
4、续或断续的改变电路参数,使被控对象能进行控制、保护、调速的电气元件。ConceptunderstandingThesignal:①manualorautomatic②outsidesystem(parametersandprograminstructions)③electricsignal(voltage,current,power,etc.)Thefunction:thecontrol,protectionandspeedcontrollingfortheapparatus.Byitsoperativechara
5、cteristics:manualapparatus,automaticapparatusByitsuse:controlapparatus,protectionapparatusByitscontactsnumber:apparatuswithcontacts,apparatuswithoutcontactsByitsworkprinciple:electromagneticapparatus,nonelectricalapparatus2)ThetypesofLow-voltageelectricapparat
6、us1.FundamentalsandintroductionA)ContactssystemB)ArccontroldeviceC)ElectromagneticmechanismD)Operatingmechanism3)ThestructureofLow-voltageelectricapparatus1.FundamentalsandintroductionA)Contactssystem3)ThestructureofLow-voltageelectricapparatus1.Fundamentalsan
7、dintroduction②material:Copper(Cu)generally;Argentine(Ag)tolowcapacityapparatus.bridgetypefingerShape①contacttypes③symbol:normallyopencontactnormallyclosedcontactB)Arccontroldevice3)ThestructureofLow-voltageelectricapparatus1.Fundamentalsandintroduction①Whatist
8、heArc?B)Arccontroldevice3)ThestructureofLow-voltageelectricapparatus1.Fundamentalsandintroduction②whatharmdoesthearccanbring?③HowtoavoidtheArc?ContactsdamageOperationmistakesperson
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