内装转换开关，用于电流60A以下的电气线路中，作为电源引入开关，并可控制电动机起动变速停止换向等。
Inside installed selector switch, can be used in the circuit below60A as power lead-in switch, and the switch cab control motorstart, change speed, stop, and commutation.
由于电子开关线路的导通次序是与转子转角同步的，因而起到了机械换向器的换向作用。
Because of the electronic switch the order of conduction lines are synchronized with the rotor Angle, which has played a mechanical commutator to the role exchange.
同时对电动机及其有关线路进行保护；并可在停止时进行换向。
Besides, it's suitable for protection of the electromotor and relevant circuit and reversion when it stops working.
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