ISOLATING SWITCH

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Isolation switch is a switching device mainly used for isolating power sources, switching operations, and connecting and disconnecting small current circuits. It does not have arc extinguishing function and can only open and close circuits without load current. When the isolation switch is in the separate position, there should be insulation distance and obvious disconnection signs between the contacts that meet the specified requirements; When in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions within the specified time. Isolation switches are mainly used in high-voltage circuits as a means of safe operation to ensure safe isolation during equipment maintenance.

FUSE

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A fuse is an electrical device used to protect circuit safety. When the current exceeds the specified value, the fuse will use the heat generated by itself to melt the fuse, thereby disconnecting the circuit. The working principle of a fuse is based on the fact that after the current exceeds the specified value for a period of time, the melt melts due to heat, causing the circuit to disconnect and providing protection

LIGHTNING ARRESTER

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A lightning arrester is an electrical device used to protect electrical equipment from high transient overvoltage hazards, by releasing overvoltage energy to limit the freewheeling time and magnitude. Lightning arresters are usually connected between power grid conductors and ground wires, and sometimes also near electrical windings or between conductors, to prevent damage to equipment and lines caused by lightning or other overvoltage. The main function of lightning arrester includes protecting communication cables and equipment from high voltage impact, limiting voltage amplitude, and quickly restoring the original state after overvoltage disappears, so that communication lines can work normally. The types of lightning arresters include protective gaps, valve type lightning arresters, and zinc oxide lightning arresters