Especially in the condition that the speed signal device is connected to the power, don't disconnect the connection between PT and the speed signal device.
特别是在转速信号装置接通电源的情况下，勿断开pt与转速信号装置间的连接。
The on-site test results indicate that energy meter's neutral point virtual connection has a great effect on PT secondary voltage drop.
基于对称分量法，对电能表中性点虚接后的电压互感器二次压降进行了分析，得出了正确接线前后的计量误差变化量。
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