The high voltage fuse is a simple device to protect the electricity. Its role is to protect electrical equipment from overload and short-circuit current damage. The working principle of the high voltage fuse is that when the current exceeds the specified value, the heat generated by itself will make the melt fuse and disconnect the circuit. Therefore, it is very important to choose the rated current of the high voltage fuse.
1, for the protection of lighting or heating equipment of the high-voltage fuse, because the load current is more stable, so the rated current is equal to or slightly greater than the rated current of the load.
2, for the protection of a single long-term working motor, to consider the motor starting, light load starting current, etc., do not avoid fusing, select a bit more rated current.
3, to protect the motor that starts frequently, it is necessary to consider that the heat will not fuse the fuse when starting.
4, if the protection of multiple motors, to ensure that peak current, will not fuse the high-voltage fuse.
5, the voltage of the selected high-voltage fuse should be greater than or equal to the rated voltage of the current.
