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Add: Guanyin Development Zone, Yalujiang North Street, Yuhong District, Shenyang

How to adjust the auxiliary switch of vacuum circuit breaker?

2020-07-15 H:39:07
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The axis of the auxiliary switch is connected with the action axis of the circuit breaker. When the circuit breaker acts, the axis of the auxiliary switch also moves. When the circuit breaker is closed, the axis of the auxiliary switch also turns to the closing position. Some of the auxiliary contacts are opened some are closed. When the circuit breaker is opened, the auxiliary switch is also coaxial rotated to the open position, the original open contact is closed, the original closed contact is opened. Different contacts can be used for control wiring according to the design requirements.

This is a key step, we should pay attention to the following points:

(1) The stroke should be too large, otherwise the contact will be deformed bent, the contact state performance will be damaged.

(2) The contact in series with the closing circuit must be adjusted to be able to be reliably cut off after the circuit breaker is closed.

(3) If it is found that the moving stationary pieces are abnormal deformed, they should be corrected restored immediately.

(4) During commissioning, the closing requirements after voltage reduction shall be met.

The adjustment method of auxiliary switch is as follows:

1. The motor circuit mainly stores energy to provide energy for closing;

2. The closing circuit is used for closing;

3. The opening circuit is used for opening;

4. The anti trip electromagnet circuit is mainly used to prevent the closing switch being disconnected after closing, then closing again after tripping in case of accident, which will cause jumping opening closing cause danger;

5. Auxiliary circuit provides auxiliary contact;

6. Locking circuit is used for interlocking of more than two circuit breakers;

7. Other auxiliary contacts (motor energy storage point) are used to connect the motor energy storage indicator, the microswitch of test position working position provides position signal.

Auxiliary switch


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