With the much higher operating voltages now in use the projected voltage transients or surges due to switching i. e. the opening and closingofcircuit breakers, have become the major consideration.
Its control circuit with double electromagnetic system can ensure synchronous closing, silent and energy saving operation of two contactors in parallel.
双电磁系统控制电路确保两台并联接触器的同步闭合和无声节电运行。
3
The burn ofcircuit breaker closing coils and contactors is a common problem in the switchyard operates.