Contactor common fault

Reasons for the contact of the contactor of the contactor is not reliable and the treatment method

If the contact is not securely contacted, the contact resistance between the moving and static contacts will increase, causing the contact surface temperature to be too high, causing the surface contact to become point contact, or even non-conduction. The reasons for this failure are:

1. There are oil, hair and foreign objects on the contacts;

2, long-term use, contact surface oxidation;

3. Arc ablation causes defects, burrs or formation of metal scrap particles;

4. There is a jamming phenomenon in the moving part.

The treatment methods are:

1. For oil stains, bristles or foreign objects on the contacts, you can use cotton cloth, alcohol or gasoline to scrub.

2. If it is a silver or silver-based alloy contact,

When the contactor forms an oxide layer on the contact surface or forms a slight burn and black under the action of the arc, it generally does not affect the work, and can be scrubbed with alcohol and gasoline or carbon tetrachloride solution. Even if the surface of the contact is burnt and uneven, you can only use the fine sputum to remove the splashing beads or burrs. Do not overdo it, so as not to affect the life of the contact.

For copper contacts, if the degree of burn is light, just use a fine boring to repair the unevenness of the unevenness, but it is not allowed to use a fine abrasive cloth to prevent the quartz sand from remaining between the contacts, but can not maintain good contact; If the burn is severe and the contact surface is low, the new contact must be replaced.

3, the movement part has jamming phenomenon, can be opened for maintenance.

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