电动机继电保护线路的改进方案

The Improving Solution of the Motor Relay Protection Circuit

在进行大功率电动机保护整定中发现,电动机起动时间为15-20s,为躲过起动时间通常要把过流时间整定的比较长,当运行中发生故障时,由于跳闸延时长,可能造成事故的扩大。本人在工作中总结出几种改进,可有效的缩短运行中保护的动作时间,更好的保护设备的安全。

When dragging the ventilation of the motor protection setting we discovered the starting time is 15-20s.We usually set the long overcurrent time to hide from the starting time.When running at fault,the long trip might burn down the motor.So we reviewed several ways to improve the protection circuit.