The Causes Of Excessive Temperature Rise in Molded Case Circuit Breakers

In the daily operation of plastic case circuit breakers, it is often found that the temperature rise of the circuit breaker is too high. The manufacturer of plastic case circuit breakers, Shanghai Great Wall, will provide a detailed explanation of the reasons for the high temperature rise of the circuit breaker and the corresponding treatment methods.

The reasons for the phenomenon of high temperature rise in molded case circuit breakers are generally as follows:
1. The contact surface of the molded case circuit breaker is severely worn or has poor contact;
2. The screws connecting the two conductive parts of the main circuit are loose;
3. The contact pressure of the molded case circuit breaker is too small, which affects the temperature changes inside the circuit breaker.
The main methods to solve the high temperature rise of molded case circuit breakers are as follows:
1. Check if the contact of the molded case circuit breaker is too small. If the above situation is found, adjust the contact spring pressure in a timely manner. If serious damage is found, replace the contact.
2. Check if there is any looseness in the connecting screws. If found, maintenance personnel should tighten them in a timely manner to ensure the normal operation of the molded case circuit breaker.
3. Check whether the contact surface of the molded case circuit breaker is severely worn or has poor contact. Corresponding measures can be taken according to the corresponding situation. If the wear is severe, the damaged contact can be replaced.
Regular maintenance work should be carried out on plastic case circuit breakers. Through the maintenance process, potential hazards of plastic case circuit breakers can be identified and eliminated early, which can improve the stability of daily operation of plastic case circuit breakers and effectively extend their service life.