Main Breaker: This is the switch that controls the flow of electricity from the main panel to the sub panel. Primary distribution systems consist of feeders that deliver power from distribution substations to distribution transformers. At this. A distribution board (also known as panelboard, circuit breaker panel, breaker panel, circuit breaker, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit. Power distribution hierarchy in building. detailed explanation of DB, SDB, MDB, RMU, and Switchgear along with any commonly related equipment you might have missed, including their purpose, application, and hierarchy in an electrical distribution system. 4kV), power is distributed to a main distribution panel (primary distribution box). Secondary Distribution Box: Serves each floor or building as needed.
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