工作特点：
L1、L2、L3三相接线正确，监视器黄灯亮，继电器吸合；如果相序接错，监视器黄灯灭。
L1、L2、L3三相或任何一相丢失（相对丢失的临界值100V），监视器黄灯灭。
Work characteristics:
If three phases L1, L2 and L3 are in a correct connection, the yellow indicator lamp is on and the relay picks up; If the phase sequence is connected incorrectly, the yellow indicator lamp goes out;
If three phases L1, L2 and L3, or any phase is opened (the critical value of phase failure is 100V), the yellow indicator lamp goes out.
技术参数：
环境温度：-25℃―- +55℃
相对温度：< 90%
外型尺寸：68mm×30mm×72mm
Technical Parameters：
Environment temperature: -25℃ ―- +55℃
Relative humidity :< 90%
Dimension:68mm×30mm×72mm
898995850
