Maintenance and Replacement of VS1 Vacuum Circuit Breaker Contact Arm

To better maintain and replace the contact arm of the vacuum circuit breaker, let's first understand the role of the contact arm. The function of the contact arm is to connect the vacuum interrupter and the plum blossom contact. Another role is to participate in the adjustment of the depth of the center cabinet. For example, if the depth of the center cabinet needs to be deepened, lengthen the contact arm proportionally. If the depth of the center cabinet does not need to be so deep, then reduce the contact arm size proportionally. Moreover, the depth of the center cabinet is different in each area, so it needs to be adjusted by the contact arm.

To better maintain and replace the contact arm of the vacuum circuit breaker, let's first understand the role of the contact arm. The function of the contact arm is to connect the vacuum interrupter and the plum blossom contact. Another role is to participate in the adjustment of the depth of the center cabinet. For example, if the depth of the center cabinet needs to be deepened, lengthen the contact arm proportionally. If the depth of the center cabinet does not need to be so deep, then reduce the contact arm size proportionally. Moreover, the depth of the center cabinet is different in each area, so it needs to be adjusted by the contact arm.

The material of the contact arm has a great influence on the current, and the material of the contact arm is generally copper or aluminum. Generally, aluminum contact arms below 1600A are uniformly used, unless there are special requirements, copper contact arms must be used, or copper contact arms are generally used for more important positions. But above 1600A, copper contact arms are used, and there are certain requirements for the silver plating layer. It is difficult to achieve this current with aluminum for large currents.

After understanding these, we have a certain understanding of the maintenance and replacement of the contact arm. If it is time for maintenance, we must clean the contact arm in time, and observe whether the mounting screws are loose, and if there is any looseness, they must be tightened. Otherwise, it will cause a virtual connection, which will cause the contact arm to burn out, and the vacuum circuit breaker may be burned out in serious cases. If possible, you can install a temperature sensor on the contact arm to measure the temperature of the vacuum circuit breaker from time to time to better protect the circuit breaker. Especially high-current vacuum circuit breakers.

For the replacement of the contact arm, generally the contact arm must be replaced if it has been used for a long time, or if it is hot or burnt, please replace it in time. The replacement can be replaced according to the original size. Note that the surface of the contact arm needs to be plated layer silver.

The above is the whole process of maintenance and replacement of the contact arm.