Regarding the load operation method of the drop-out fuse, how to operate the 10kV distribution line of the rural power grid and the distribution transformer with a rated capacity less than 200kVA, what are the steps, including the precautions for opening and closing.

In rural power grid 10kV distribution line branch lines and distribution transformers with rated capacity less than 200kVA, they should be operated with load according to the following requirements:

1. The drop-out fuse is operated by two persons (one person for supervision, one person for operation), but it is necessary to wear insulated gloves that have passed the test, wear insulated boots, goggles, and use qualified insulated rods with matching voltage levels. , It is forbidden to operate in the weather of thunder and lightning or heavy rain.

2. When pulling the gate, the usual rule is to pull off the center phase first, then pull the side phase of the leeward wind, and finally pull the side phase of the top wind.

This is because the distribution transformer is changed from three-phase operation to two-phase operation, and the arc spark that occurs when the center phase is broken is the smallest, which will not cause a short circuit between phases. The second is to pull off the leeward side phase. Since the center phase has been opened, the distance between the leeward side phase and the top wind side phase has doubled. Even if an overvoltage occurs, the possibility of a short circuit between the phases is very small. When the top wind edge phase is finally broken, there is only capacitive current to the ground, and the electric spark that occurs is already very slight.

3. When closing, the operating sequence is reversed when opening the switch, first close the top wind side phase, then close the leeward side phase, and finally close the center phase.

4. The operation of the fusion tube is a frequent item. Not paying attention to it will cause contact burns and poor touch, overheating of the contacts, annealing of the tension springs, and promotion of bad touch of the contacts, forming a vicious circle.

Therefore, you must use moderate force when pulling and joining the fusion tube. After closing, carefully check that the duckbill tongue can tightly clasp the tongue for more than two-thirds of the length of the tongue. You can hook the upper duckbill with the pull lever and press it down several times. Try to pull it again quietly to see if it fits well. Failure to be in place or not securely closed when closing, lack of static contact pressure on the fuse, it is easy to cause contact burns or the melting tube to fall by itself.

Disconnect: Use the tip of the operating rod to push it on the falling spring plate (on the upper contact of the fuse), and the fuse tube will fall off. Closing: Insert the upper hook of the fuse tube with the horizontal hook of the handle bar and push it upwards (to be satisfied, and to make a reverse hook pull to verify whether the contacts are fastened), the fuse tube will be closed.