BK/GMC-4A

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Fuses are widely used devices with electric arc, current limitation, overcurrent protection, short circuit protection and other functions. As an important component device for industrial equipment and power system, fuses are widely used in power transmission and distribution, motor protection, power load protection and other fields. In this article, we will introduce the application field and working principle of BK/GMC-4A fuse.

Application field of BK/GMC-4A

The BK/GMC-4A fuse is a kind of electromechanical fuse with high reliability and reliability. It has some features such as: low operating current, fast response, long service life, no need for electromagnetic auxiliary length. It is suitable for AC system of 400V and below. It is widely used in power supply system of machinery and power equipment, DC power system of anti-thyristor feedback rectifier, electric heat and other electric equipments and short circuit protection.

Working principle of BK/GMC-4A

The BK/GMC-4A fuse has two working modes: thermal action and electric action. When the current passes through the BK/GMC-4A fuse, the current passes through the two electrodes in parallel. The heat generated by the current and the heat generated by the contact resistance between the two electrodes will produce a certain internal pressure in the fuse tube. Once the inside pressure is too large, the fuse tube will break.

When electric action works, a permanent magnet is set inside the fuse head core, which produces a magnetic field between the two electrodes of the fuse. When the current goes beyond the current-carrying capacity of the fuse, the current will suddenly increase, resulting in a repulsive force between the two electrodes, making the fuse element break.

Conclusion

The BK/GMC-4A fuse has the features of high safety performance, fast reaction speed and long service life, which can be widely used in power system, motor protection, power load protection and other fields. It has the characteristics of thermal action and electric action, which can ensure the safe use of the fuse.

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