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The protection characteristics of the fuse should be compatible with the overload characteristics of the protected object. Considering the possible short-circuit current, select...

​The fuse in the low-voltage power distribution system is an electrical appliance that plays a role in safety protection. The fuse is widely used in the protection of the power ...

​In order to prevent the occurrence of leapfrog fusing and expand the scope of the accident, the fuses of the upper and lower (ie power supply trunk and branch lines) lines shou...

​The rated current of the melt is not equal to the rated current of the fuse. The rated current of the melt is selected according to the load current of the protected equipment.

Plug-in fuse: It is often used at the end of the line with a voltage level of 380V and below as a short-circuit protection for distribution branch lines or electrical equipment.

​It is an electrical appliance that uses metal conductors as melts in series in a circuit. When an overload or short-circuit current passes through the melt, it will fuse due to...

​In daily operation, the contamination of the surface of the porcelain sleeve of the arrester should be checked, because when the surface of the porcelain sleeve is seriously po...

The metal oxide arrester (MOA) is connected in parallel with the distribution transformer during normal operation, the upper end is connected to the line, and the lower end is g...

​Due to various reasons such as single-phase grounding, long-line capacitance effect and load shedding in the power system, the power frequency voltage will rise or the transien...

​The reliability of long-term operation depends on the quality of the product and whether the selection of the product is reasonable.

​The gapless zinc oxide arrester has high contamination resistance. At present, the creepage distance level stipulated by the national standard is: Class II medium pollution are...

Earthquake force to bear. The maximum wind pressure acting on the arrester. The top of the arrester bears the maximum allowable pulling force of the wire.