春晨电机引接线 电机引出线 电机连接线

 

Schematic diagram of ground potential operation

 

 

地电位作业是指人体处于地（零）电位 态下，使用绝缘工具间接接触带电设备，来达到检修目的的方法。春晨电机引接线 电机引出线 电机连接线其特点是：人体处于地电位时，不占据带电设备对地的空间尺寸。地电位作业的位置示意图如图如下图所示。

 

Ground potential operation refers to the method that the human body is in the ground (zero) potential state and the insulating tool is used to contact the live equipment indirectly to achieve the maintenance purpose. Its characteristics are: when the human body is at the ground potential, it does not occupy the space size of the charged equipment to the ground. The location diagram of ground potential operation is shown in the figure below.

 

 

 

地电位作业原理图解

 

Schematic diagram of ground potential operation principle

 

地电位作业原理图解

 

Schematic diagram of ground potential operation principle

 

 

作业人员位于地面或杆塔上，人体电位与大地（杆塔）保持同一电位。此时通过人体的电流有两条通道：一是带电体→绝缘操作杆（或其他工具）→人体→大地，构成电阻通道；二是带电体→空气间隙→人体→大地，构成电容电流回路，这两个回路电流都经过人体流入大地（杆塔）。

 

The operator is located on the ground or on the tower, and the potential of human body is the same as that of the earth (tower). At this time, there are two channels for the current passing through the human body: one is the electrified body → insulated operating rod (or other tools) → human body → earth, which forms the resistance channel; the other is the electrified body → air gap → human body → earth, which forms the capacitance current circuit, both of which flow into the earth (tower) through the human body.

 

 

 

严格地说，不仅在工作相导线与人体之间存在电容电流，另两相导线与人体之间也存在电容电流。但电容电流与空气间隙的大小有关，距离越远，电容电流越小，所以在分析中可以忽略另两相导线的作用，或者把电容电流作为一个等效的参数来考虑

 

Strictly speaking, there is not only capacitive current between the working phase conductor and the human body, but also between the two phases conductor and the human body. However, the capacitance current is related to the size of air gap. The farther the distance is, the smaller the capacitance current is. Therefore, the role of other two-phase conductors can be ignored in the analysis, or the capacitance current can be considered as an equivalent parameter