When power generation and power consumption system with same voltage class is built within the bound of ground grid with zero ground potential, operators safety in the ground grid can be ensured.

在零地电位接地网的范围内建设同级电压的发电-用电系统，可保证在该接地网内工作人员的人身安全。

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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。

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