The problem of choice of zero point of electric potential is analyzed. concentrating on how to choose and the limited conditions.
对电势零点的选取问题进行了分析，重点论述了电势零点如何选取及所限定的条件。
There is voltage to ground between ground part of electric equipment and point of zero electric potential of earth.
电气设备的接地部分与大地零电位点之间存在对地电压。
Eventually, it debates how to superpose the electric potential when the zero point is different.
最后讨论零点不同的电势如何进行叠加。
Eventually, it debates how to superpose the electric potential when the zero point is different.
最后讨论零点不同的电势如何进行叠加。
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