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1前言东风。型机车空气压缩机由ZZ-82型电机带动，而ZZ-82型电机自身未带降压系统绕组，为配合它的起动特增设了空压机降压接触器（ThC）、空压机起动电阻（l-ZRY）和第二时间继电器（ZSJ）三个元件。由于空压机电机起动频繁，起动电流又较大，一旦降压接触器虚接或不吸合时，?
1 foreword Dongfeng. The locomotive air compressor is driven by the ZZ-82 motor, while the ZZ-82 motor does not have the buck system windings. In order to cooperate with its start-up, an air compressor step-down contactor (ThC) Resistance (l-ZRY) and the second time relay (ZSJ) three components. As the compressor motor start frequently, the starting current is larger, once the vacuum contactor virtual connection or not, when?