Insulation Contact Box Temperature Rise

Ventilation design: Since the primary plum blossom moving contact of the circuit breaker is inserted into the static contact inside Insulation Contact Box, it is enclosed in a small space, and air circulation is difficult, and heat is not easy to dissipate. It is often the place with the highest temperature rise in the middle cabinet, especially the B phase of the upper plum blossom contact. The heat is surrounded by the surrounding heat-generating components, and the airflow at the bottom goes up, so the heat accumulates. The solution is ventilation. The contact box needs to have a ventilation design, and ventilation holes are set at the bottom or top to effectively take away the heat. For the IP level between compartments, as long as the opening is less than 12, some people worry that other compartments will be damaged when an internal arc fault occurs. In fact, it does not matter whether the opening is made or not. The internal arc fault will instantly cause all partitions to deform. Whether there are holes in the contact box or not will cause some burning and dust to other compartments, but it will not cause major damage, and will not cause the entire switch cabinet to be scrapped. However, for temperature rise, it is completely different whether there are holes or not. Convection is an effective way to reduce temperature rise.