1. Operation sequence of drop-out fuse during power outage:
a. When the drop-out fuses are arranged horizontally and there is wind, the power outage operation should be carried out against the wind. First open the leeward side phase fall fuse, then pull the middle phase fall fuse, and finally pull the E phoenix side phase fall fuse. When the drop fuses are arranged horizontally and there is no wind, the power outage operation should first pull the middle phase drop fuse, and then pull the left and right phase drop fuses.
b. When there is wind in the triangular arrangement of the falling fuse, during a power outage, the downwind side phase falling fuse should be opened first, then the upwind side phase falling fuse, and finally the middle phase falling fuse. When there is no wind in the triangular arrangement of the fall fuses, the power outage operation should first open the fall fuses on the left and right sides, and then open the middle phase fall fuse.
2. The power supply operation sequence of drop-out fuses: Whether the drop-out fuses are arranged in a triangle or horizontally, the power supply operation must first close the middle-phase drop-out fuse, and then close the drop-out fuses on both sides.
3. Drop-out fuse stop, branch line and transformer operation sequence:
a. The distribution transformer stops operating. First open the air circuit breaker or low-voltage fuse on the low-voltage side of the transformer to stop the low-voltage load of the distribution transformer, and then open the falling fuse on the high-voltage side of the distribution transformer.
b. The distribution transformer is put into operation. Turn off the falling fuse on the high-voltage side of the distribution transformer first, and then turn off the low-voltage, side air circuit breaker or low-voltage fuse of the transformer.
c. The branch line falling fuse stopped operating. The operator operates according to the order of stopping a single distribution transformer, stopping the branch line, stopping the distribution transformers one by one, and finally opens the falling fuse that controls the branch line and removes the fuse tube.
d. The power supply procedure is reversed.