摘要
利用负序电流法和零序电流法监测三相异步电动机的运行状态,并设计电动机保护电路和PLC的控制梯形图,用FX系列PLC进行故障类型判别和报警处理,设计方案原理简单、工作可靠。
The running state of three-phase asynchronous motor is monitored by negative-sequence current method and zero-sequence current method. Design the protective circuit of a motor and control ladder diagram of PLC and use PLC of series FX to discern fault type and alarm handling. The principle of the design is simple and reliable in work.
出处
《电气开关》
2007年第6期32-33,45,共3页
Electric Switchgear
关键词
负序电流
三相异步电动机
保护
PLC
negative - sequence current three- phase asynchronous motor
protection PLC
