Install the AC Contactor:

(1) Check whether the technical data of the contactor nameplate and the coil (such as rated voltage, current, operating frequency, etc.) meet the actual use requirements.

(2) Check the appearance of the contactor without mechanical damage; when pushing the movable part of the contactor by hand, the contactor should be flexible and free from jamming; the arc-extinguishing cover should be intact and firmly fixed.

(3) Wipe the anti-rust grease on the pole surface of the iron core or the iron scale stuck on the pole surface with kerosene to avoid the armature being stuck after repeated use, which may not be released after the power is cut off.

(4) Measure the coil resistance and insulation resistance of the contactor, which should meet the requirements.

(5) AC contactors should generally be installed on a vertical plane with an inclination of no more than 5°; if there are vents, the holed side should be placed in a vertical direction to facilitate heat dissipation; Arc space, so as to avoid arcing and burning adjacent appliances.