It mainly includes a lighting distribution box for controlling the lighting system and a power box for controlling the power system. Most of these products have a modular structure that can control 12 circuits. Their shells are mostly made of cast aluminum alloy materials, some are welded with steel plates, and a small portion are made of insulation materials. It mainly consists of circuit breakers, contactors, and thermal relays inside. The components such as conversion switches, signal lights, buttons, etc. can be selected and equipped by the manufacturer according to user needs. The explosion-proof level can reach level II CT6. By the way, explosion-proof automatic switches, explosion-proof knife switches, and fuses are also commonly used in some control situations to control the opening and closing of power or lighting distribution systems, but they become a single piece. Therefore, these products are also classified under this category of products.