该系统以可控硅三相桥式全控整流电路构成系统的主电路，采用同步信号为锯齿波的触发电路。
The thyristor triphase-bridge full controllable rectification circuit is taken as main circuit of the system and the trigger circuit with saw-tooth synchronism signal is adopted.
KA5为跳闸报警继电器。当设备产生偏励磁、可控硅故障、过电流等故障时，KA5吸合，断路器分励线圈得电跳闸，切断主电源。
When there are bias excitation, controllable silicon failure, over current and other failures, KA5 gets absorbed and breaker loop trips by powered on so as for switching off main power supply.
电气主回路采用二极管可控硅无触点开关，电路开关时间迅速，准确。
The main electrical circuit adopts the diode thyristor (SCR) contactless switch, to make sure the circuit switch time rapidly, accurately.
本文分析了目前纺织厂通风机可控硅串级调速四种主电路方案的特点、效率和谐波等情况。
This paper analyses the characteristics, efficiency and harmonic of four kinds of power circuits for SCR-cascade control used in textile mill ventilators.
主回路采用可控硅单相桥式整流电路。
The main loop adoption can control the silicon list mutually the bridge type to commutate electro circuit.
主回路采用可控硅单相桥式整流电路。
The main loop adoption can control the silicon list mutually the bridge type to commutate electro circuit.
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