The maintenance cycle of fuses mainly depends on their use environment and type. Generally speaking, the maintenance cycle of fuses can be divided into daily maintenance, regular maintenance and special maintenance.
Daily maintenance
Daily maintenance is the basis for ensuring the normal operation of fuses, and is usually performed at least once a month. The specific contents include:
Check the contact of the grounding wires of each capacitor housing to ensure good contact.
Check whether the cable connectors are hot and discolored, and whether the grounding wires are rusted.
Cleaning and dust removal work to keep the equipment clean.
Check the capacitor housing in the capacitor cabinet to ensure that it is intact and leak-free.
Regular maintenance
Regular maintenance is to extend the service life of the fuse and ensure its long-term stable operation. It is usually performed at least once every six months:
Check the busbar and its down conductor connection to ensure that the connection is firm and reliable.
Check the secondary circuit wiring to ensure that the fuse is intact, and perform a shaking test of the insulation resistance.
Inspection of capacitor cabinet, including action test of capacitor controller when disconnecting air switch without capacitor, adjustment of overvoltage protection, undercurrent protection, switching threshold, etc. Check each indicator light to ensure normal operation, and check and adjust circuit breaker, leakage circuit breaker, thermal relay, time relay, etc. Special maintenance Special maintenance is usually carried out when the fuse fails or needs overhaul, and the cycle depends on the specific situation: Replace fuse : If the fuse is rusted, damaged or cracked, it should be replaced in time . Check the fuse spring to ensure it is intact . Clean the insulating porcelain parts, check whether the porcelain parts are damaged, and tighten the terminal bolts . Adjust the contact steel sheet to ensure appropriate contact pressure .