Drop out fuse switch refers to an electrical appliance that blows the melt and disconnects the circuit with the heat generated by itself when the current exceeds the specified value. The fuse is based on the current exceeding the specified value for a period of time, with its own generated heat to melt the melt, so that the circuit is disconnected; A current protector is made using this principle. Fuses are widely used in high and low-voltage distribution systems and control systems and electrical equipment, as a protector of short circuits and overcurrent, and are one of the most widely used protection devices.

Types of Drop Out Fuse Cutout Switch

Drop Out Fuse

Drop Out Fuse HPRWG1-12F

Drop Out Fuse HRW3

Drop Out Fuse HRW7

Cutout Switch

Cutout Switch ZW8-12/C

Cutout Switch ZW32-12

HV Disconnector

HV Disconnector GW5

HV Disconnector GW13

How to Select the Right Drop Out Fuse Cutout Switch

Select the type of fuse according to the line requirements and installation conditions. For a circuit with a small capacity, choose a semi-closed or unfilled closed type; for a larger short-circuit current, choose a filled closed type; for semiconductor component protection, choose a fast fuse.

Select the rated current of the fuse according to the load characteristics.

The selection of melts at all levels needs to cooperate with each other. The latter stage is smaller than the previous stage. The current on the main grid and each branch line is different, and the selection of fuses is also different.

Select the rated voltage of the fuse according to the line voltage.

The fuse current for AC asynchronous motor protection cannot be selected too small (2~2.5 times the rated current of the motor is recommended). If the selection is too small, it is easy to cause the fuse of one phase to blow, causing the motor to burn out due to lack of phase. It must be equipped with a thermal relay for overload protection.

Note: The fuse current includes two aspects, one is the rated current of the seat and frame where the fuse is installed, and the other is the rated current of the fuse. The two should not be confused. This is similar to a circuit breaker.