IS2020LVPSG1A GE 继电器电路

36B605756ABG02 MOV ASM 575V
36B605756ADG01 DC300 POWER SUPPLY K
36B605776AAG02 CONTROL TRANSFORMER
36B605787AAG01 HARNESS DC2000
36B605787AAG02 2PL CABLE “DC DX”
36B605787AAG03 2PL CABLE ASM
36B605787AAG05 2PL CABLE
36B605787AAG06 2PL CABLE
36B605787AAG07 2PL CABLE
36B605787ACG01 2PL W/ ARCNET G
36B605787ACG02 2PL W/ ARCNET ‘D’
36B605787ACG03 2PL W/ ARCNET ‘P’
36B605787ACG04 2PL W/ ARCNET ‘Q’

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描述

使主电路中的3对常开触点闭合,异步电动机M的三相电源被接通,电动机开始运行,控制电路中接触器KM的辅助常开触点同时接通。放开起动按钮后,SBl的常开触点断开,电流经KM的辅助常开触点和SB2、FR的’常闭触点流过KM的线圈,电动机继续运行。KM的辅助常开触点实现的这种功能称为“自锁”或“自保持”,它使继电器电路具有类似于R-S触发器的记忆功能。

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