Operation and maintenance of low voltage circuit breaker should note the following:

(1) Before using the rust preventive oil to the working surface of the wipe electromagnet, so as not to affect the operation value; Clear

(2) regular maintenance falls automatic switch dust, so as to reduce the insulation;

(3) use of a certain number of times, the contact surfaces of the burrs should be removed, particulate matter, etc., in order to maintain good contact, contact wear over 1/3 of the original thickness, should be replaced;

(4) by the short-circuit current breaking, or after interrupting normal times, remove the metal particles on the inner walls of the arc extinguishing and smoke and grids, in order to maintain good insulation and arc extinguishing properties;

(5), if necessary, to the rotating parts of the operating mechanism lubricating;

(6) periodically check the trip unit and the delay setting value.