浅析低压电动机的过电流保护  

Brief Analysis on Overcurrent Protection of Low-Voltage Motors

作　　者：李琳锋 Li Linfeng(Electric Instrument Operation Center,Daqing Refining and Chemical Company,Daqing 163000,China)

机构地区：[1]大庆炼化公司电仪运行中心,黑龙江大庆163000

出　　处：《防爆电机》2024年第3期66-69,共4页Explosion-proof Electric Machine

摘　　要：低压电动机的过电流保护,是以电动机运行电流参数作为整定条件的保护类型。通过设定不同的电流整定值,实现电动机运行电流异常时,发出警告信号或控制电动机直接跳闸的保护功能。通过对过电流保护中两种常见类型过载保护和短路保护的定值整定原则、动作的原因、实现的原理、动作的途径等进行分析,阐述了过电流保护目前存在的短板并提出保护整定方案,为更早发现并控制电动机异常提供了宝贵意见。The overcurrent protection of low-voltage motor is a protection type of taking the current parameter of motor operation as the setting condition.By giving different current setting values,the protection functions of sending warning signal or controlling the direct trip of motor are realized when the motor operation current is abnormal.Through analyzing the setting principle,action reason,realization principle and action way of two common types of overcurrent protection such as overload protection and short circuit protection,this paper describes the existing shortcomings of overcurrent protection and puts forward the protection setting scheme,which provides some valuable suggestions for early detection and control of motor abnormity.

关 键 词：电动机 过电流 过载保护 短路保护 

分 类 号：TM307[电气工程—电机]