Principles And Methods For Selecting Drop-out Fuse Manufacturers

drop out fuse price Principles and methods of manufacturer selection

drop out fuse set is mainly composed of three parts: fuse, shell and support, among which the fuse is the key component to control the fusing characteristics. The material, size and shape of the fuse determine the fusing characteristics. Fuse materials are divided into two categories: low melting point and high melting point.
Function of drop out fuse unit:

It mainly plays the role of protecting the safe operation of the circuit. drop out type fuse refers to an electrical appliance that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value.
When a circuit fails or is abnormal, the current continues to rise, and the increased current may damage some important or valuable components in the circuit, and may also burn the circuit or even cause a fire. If dropout fuse of transformer is correctly placed in the circuit, then expulsion drop out fuse will fuse and cut off the current when the current abnormally rises to a certain height and a certain time, thereby protecting the safe operation of the circuit.
Principles of fuse drop out:

1. Select the model of ht drop out fuse according to the line requirements and installation conditions. For circuits with small capacity, choose semi-enclosed or unfilled enclosed type; for circuits with large short-circuit current, choose filled enclosed type; for semiconductor component protection, choose fast fuse.

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

3. The selection of each level of fuse must be coordinated with each other. The latter level should be smaller than the previous level. The current on the main switch and each branch line is different, and the selection of fuse is also different.

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

5. The fuse current for AC asynchronous motor protection cannot be too small (2~2.5 times the rated current of the motor is recommended). If it is too small, it is easy to cause one phase fuse to melt, causing the motor to burn out due to phase loss. A matching thermal relay is required for overload protection.