01 low-voltage

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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