pt secondary connection pt二次接线
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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