电力系统对电压的测量主要采用电磁式电压互感器，需进行二次变压，才能将电网上的信号变为电子测量装置可用的信号。
The voltage transformer used in power system usually adopts electromagnetic configuration whose output signal can't be directly used by electronic apparatus without further transformation.
电力系统对电压的测量主要采用电磁式电压互感器，需进行二次变压，才能将电网上的信号变为电子测量装置可用的信号。
The voltage transformer used in power system usually adopts electromagnetic configuration whose output signal can't be directly used by electronic apparatus without further transformation.
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