要切换到压缩机，可以通过电流接触器开关，继电器或者双向可控硅来控制电流盒或者电路板。
Control electric box or circuit board with contactor, relay, or triac that switches to the compressor.
介绍一种用于低压无功补偿装置中的智能型复合开关，它采用双向晶闸管与磁保持继电器并联的工作结构。
A kind of intelligent compound switch using for reactive power compensation of low voltage, using a parallel structure of bidirectional silicon-controlled and magnetic latching relay was introduced.
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