FUSE PROTECTOR

The fuse protector is a kind of circuit protection device, which has advantages of simple structure, convenient use, and low price, and it is widely used in power systems, various electrical equipment and household appliances. When the power grid and electrical equipment are short-circuited, overloaded, and other faults, the conductor in the fuse will melt due to self-heating, and then the circuit will be cut off immediately. Unlike the circuit breaker, the fuse protector is a disposable device. When the internal conductor of the fuse is blown, a new fuse must be replaced immediately. In order to prevent the occurrence of leapfrog fuse and expand the scope of accidents, there should be good coordination between the fuses on different levels of lines, that is the rated current of the upper level (power supply main line) should be 1 to 2 levels larger than that of the lower level (power supply branch line).

There are many types of fuse protectors. According to the rated voltage, fuse protectors can be divided into high-voltage fuse protectors and low-voltage fuse protectors. According to the protection objects, fuse protectors can be used to protection of transformers, transformers, power capacitors, semiconductor components, motors, and household appliances. According to the structure, the fuse protectors can be divided into open type, semi-closed type, tube type and jet fuse type. According to the shape, the fuse protectors can be divided into square type, cylindrical type, bolt type and so on.

The lightning arresters are mainly used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, and to limit the freewheeling time.