The use of plastic case circuit breakers is now becoming more and more widespread and it is fair to say that everyone knows about them. Those who are interested should be aware that some customers have no guarantee of longevity after purchasing this product, and after a while they fail and have problems with maintenance and replacement.

Causes of damage to the molded case circuit breaker can be said to be only two kinds of reasons:

1. the quality of the product purchased is not qualified, probably to save money and purchase unqualified products

2. Do not understand the use of the environment and maintenance methods of the molded case circuit breaker, the machine life will be greatly shortened

Next we come to understand some environmental requirements and precautions for molded case circuit breakers: 1.

1. We should all know. Plastic case circuit breakers require temperature and humidity data for all surrounding living environments, and the temperature of the surrounding air is controlled to within 40. The minimum operating temperature information cannot be significantly lower than minus 5 degrees, and the average temperature control cannot exceed 35. otherwise, the use of the molded case circuit breaker may be affected. For the requirements of our atmosphere, the relative humidity cannot exceed 50% at 40. The humidity can be increased for low temperature levels, but the monthly average humidity for students cannot exceed 90%.

2. The contact of the moulded case circuit breaker is mainly operated by hand, but if manual operation is too complicated, try to close the electrical. The free tripping mechanism locks the parent contact in place when the parent contact is closed. After the coils of the trip have been connected to the hot tripping element and the main circuit, the machine starts to work. Operation and maintenance can only be carried out if the working principle is fully understood.

3. In normal use of the plastic case circuit breaker, if a short circuit or severe overload is detected, an overcharge release will pull the armature, thus activating the free release mechanism and cutting off the main circuit. If the circuit is overloaded, the thermal element will bend and the main circuit will be interrupted. In case of insufficient circuit voltage, the body voltage will be released.

The procedure for using a moulded case circuit breaker is now very simple. Buy a quality assured product and don't worry at all about subsequent operation. Don't worry about problems in use either. We can first try to repair the work by following the instructions. If you really can't repair it yourself, you can simply call an expert to do so. The user is not required to take the risk anyway, so it is particularly important to find a company with an after-sales guarantee.