Vsually we measure linking groups of three phase transformer in alternating current method.

三相变压器联接组的测定通常采用交流法。

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The controller case includes stepping motor, self-coupling voltage regulator, alternating-current contactor, relay and micro-transformer.

控制柜主要包括步进电机、自耦调压器、交流接触器、继电器以及微型互感器等。

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The modified types will not be equipped with commutation transformer and the three-phase alternating current power supply directly acquires DC voltage through bridge type rectifier.

改进型不配整流变压器，将三相交流电源直接由桥式整流获得直流电压。

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