The fuse is actually to tighten the fuse system from the moving contacts at the top of both sides of the melt pipe and the moving contacts below, and after pushing the upper ones into the place where the duck's beak protrudes, the phosphor copper sheets made of these are held by Chutian with the moving contacts, and the old and old ones are stuck in the duck's beak. If the short-circuit current passes through the fuse and breaks the fuse, with the help of the upward and downward moving contact spring of the fuse, the fuse will fall quickly, disconnect the circuit, and remove the obstacle line or obstacle device.
Some of the problems that cut-out fuses are prone to, such as:
1. If the shoveling workmanship is rough and the quality is poor, then the spring of the contact will not be elastic in place, which will make the contact of the contact poor and the spark will overheat
2. If the rotating shaft of the melt pipe is not made fine and flexible, then the angle of the melt pipe cannot meet certain requirements, especially if most of the size of the fused pipe can not meet the requirements, or the duckbill is blocked and cannot be moved, then it will cause the melt to fall immediately after the melt is broken, the arc cutting gate is difficult, the contact contact is not good again, and there is an electric spark
3. The fuse is specified to be cut off, so the energy generated is small, and its small value is smaller than the three-phase short circuit of the protected system
4. The size of some melt pipes is not very compatible with the stable place of the fuse, and it is easy to loosen, if it encounters any external force or vibration during operation, it will fall by itself, which not only reduces the amount of electricity sold, but also makes it difficult to supply reliable green indicators