中间电位作业法是指人体处于接地体和带电体之间的电位状态，使用绝缘工具间接接触带电设备来达到其检修目的的方法。其特点是人体处于中间电位下，占据了带电体与接地体之间一定空间距离，既要对接地体保持一定的安全距离，又要对带电体保持一定的安全距离。在配电线路带电作业中，可以是既对接地体保持一定的绝缘强度，又要对带电体保持一定的绝缘强度，就可以进行作业。这是由于配电线路电压等级较低，可以通过绝缘材料包裹形成一定绝缘强度代替一定的空间距离，来达到安全作业。而输变电带电作业中，电压等级较高，没有绝缘材料能包裹形成一定绝缘强度，所以必须需要一定的安全距离来保证带电作业安全。中间电位工作原理中间电位作业位置示意图如下图所示所示。
当作业人员站在绝缘梯上或绝缘平台上，用绝缘杆进行的作业即属中间电位作业，此时人体电位是低于导电体电位高于地电位的菜—悬浮的中间电位。
采用中间电位法作业时，人体与导线之间构成一个电容Q1，人体与地(杆塔）之间构成另一个电容C2，绝缘杆的电阻为R1，绝缘平台的绝缘电阻为R2。
4301-MBP-DFCM
Intermediate potential operation method refers to the method that the human body is in the potential state between the grounded body and the charged body, and the insulating tool is used to indirectly contact the charged equipment to achieve the purpose of maintenance. It is characterized by the human body under intermediate potential, which occupies a certain space distance between the charged body and the earth body. It is necessary to maintain a certain safe distance between the ground body and the charged body. When a distribution line works live, it is necessary to maintain a certain insulation strength for both the ground body and the live body. This is because the voltage level of the distribution line is low. Insulation materials can be wrapped to form a certain insulation strength instead of a certain space distance to achieve safe operation. However, in live operation of power transmission and transformation, the voltage level is high, and no insulating material can wrap to form a certain insulation strength, so a certain safety distance must be required to ensure the safety of live operation. Operating principle of intermediate potential The operating position diagram of intermediate potential is shown in the figure below.
When the operator stands on the insulation ladder or the insulation platform, the operation carried out by the insulation rod is the intermediate potential operation. At this time, the potential of the human body is lower than that of the conductive body and higher than that of the ground potential.
When the intermediate potential method is used, a capacitor Q1 is formed between the human body and the wire, and another capacitor C2 is formed between the human body and the ground (tower). The resistance of the insulation rod is R1, and the insulation resistance of the insulation platform is R2.
