How to maintain the low-voltage explosion-proof circuit breaker after frequent use?

How to maintain the low-voltage explosion-proof circuit breaker after frequent use?
All kinds of electrical appliances have an end of life, which is what we often say, such as the lighting switch we talk about his number of switches, the battery we say it cycles the number of times or the number of discharges, if there is not one in a good product with science The effective maintenance, its service life will also be greatly reduced, which is why there are a lot of users how to respond to how long it has not been on a variety of small problems, the following talk about how to check and maintain:
1 Check for dust and defects on the outside. Dust regularly to keep the circuit breaker clean.
2 Check if the load exceeds the rating of the circuit breaker.
3 Check the contact wires of the contacts for overheating.
4 Check that the fixing bolts are tight.
5 check, check the tripping set value is correct; check whether the thermal element is damaged, the gap is normal.
6 Check whether there are any deformations, rusts, and defects in the connecting rods, pins, and springs of the operating mechanism, and whether the operation is flexible. 7 Check whether the indicators of the minute and closing status are correct.
8 Monitor the automatic switch with or without abnormal sound during operation.
9 Open the casing Check if the position of the arc extinguishing cover moves due to vibration. Whether the arc cover is damp or burned by the arc. The damped arc extinguishing cover should be dried. When there are smoke marks and metal frit on the surface, you can use a knife or Fine repair and scraping; If arc extinction grid burning serious or arc shattered, should be replaced immediately, so as not to cause phase short circuit accidents.
10 Check whether the surface of the electromagnet has oil stains, dust, whether the coil is overheated and scorched, and whether the spring has rust marks.