The primary distribution box refers to the main distribution box, typically located in the distribution room. The complete set of products can form a complete three-level protection system for construction electricity, achieving the goal of one machine, one switch, and one protection, which is very suitable for various standard engineering applications. Many feeders leave substation in a concrete ducts and are routed to a nearby pole. At this. After stepping down the voltage through the transformer's low-voltage side (0.
