Schematic diagram of ground potential operation

 

 

地電位作業(yè)是指人體處于地（零）電位 態(tài)下，使用絕緣工具間接接觸帶電設(shè)備，來達(dá)到檢修目的的方法。春晨電機(jī)引接線 電機(jī)引出線 電機(jī)連接線其特點(diǎn)是：人體處于地電位時(shí)，不占據(jù)帶電設(shè)備對(duì)地的空間尺寸。地電位作業(yè)的位置示意圖如圖如下圖所示。

 

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.

 

 

 

地電位作業(yè)原理圖解

 

Schematic diagram of ground potential operation principle

 

地電位作業(yè)原理圖解

 

Schematic diagram of ground potential operation principle

 

 

作業(yè)人員位于地面或桿塔上，人體電位與大地（桿塔）保持同一電位。此時(shí)通過人體的電流有兩條通道：一是帶電體→絕緣操作桿（或其他工具）→人體→大地，構(gòu)成電阻通道；二是帶電體→空氣間隙→人體→大地，構(gòu)成電容電流回路，這兩個(gè)回路電流都經(jīng)過人體流入大地（桿塔）。

 

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.

 

 

 

嚴(yán)格地說，不僅在工作相導(dǎo)線與人體之間存在電容電流，另兩相導(dǎo)線與人體之間也存在電容電流。但電容電流與空氣間隙的大小有關(guān)，距離越遠(yuǎn)，電容電流越小，所以在分析中可以忽略另兩相導(dǎo)線的作用，或者把電容電流作為一個(gè)等效的參數(shù)來考慮

 

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