BK/S505-12-R

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Fuses are widely used as protective devices in the circuit, to protect the circuit and equipment from overload and short-circuit. With the advancement of technology, fuse products have also developed so that customers can choose their ideal products with different purposes. One of the commonly used fuse products is BK/S505-12-R. This article will discuss its application field and working principle.

Application Field of BK/S505-12-R

BK/S505-12-R is a kind of high breaking fuse. It is suitable for line and end protection of medium voltage assembling cabinet. It can be used in civilian air defense system, highway system, oil and gas system, and other medium voltage power system. It can protect circuit from overload and short-circuit effectively, avoiding damage to personnel and property.

Due to its stability and reliable breaking performance, it is widely used in a variety of installation occasions. It is suitable for air circuit, air switch or vacuum circuit in the outdoors military communication system; it can play the role of overvoltage protection in railway line equipment; it can also be used as the overcurrent protection for medium voltage distribution transformer.

Working Principle of BK/S505-12-R

BK/S505-12-R has a unique design, the inner has a fuse element, when the fault occurs, the fuse element will absorb the heat energy, then become a cold plasma, and the molten fuse element will turn into powder and separate from the fuse element, thus interrupting the circuit.

When the working current is increased, its internal fuse element can quickly issue heat. The heat can be transmitted to the surrounding areas and absorbed by components of surrounding area. When the temperature exceeds the melting point of the electrode, the fuse element will melt and break down. And when the temperature reaches a certain degree (operation voltage), the spring of the fuses will be compressed and the contacts will be opened, thus cutting off the circuit.

The main advantages of this design are rapid response and reliable breaking. In the process of breaking, the contact of fuse element has low contact pressure, so that the electric arc is quickly extinguished and the electrical system is not damaged. It also has high repeat cycle breaking ability. When the current rises again, if it still exceed the operation current, it can achieve the second-time breaking. For the system safety, it is very important.

Conclusion

In conclusion, BK/S505-12-R is a kind of high breaking fuse, suitable for line and end protection of medium voltage assembling cabinet. Its working principle is based on heat energy conversion, when the fault occurs, the fuse element quickly overheats and melts, thus interrupting the circuit. It has rapid response and reliable breaking, so it can provide excellent protection for the circuit and equipment.

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