With cross-tie disconnector “DT”, the power of line A can be switched to branch A1, bypassing the busbar. The busbars are then accessible for maintenance. Each branch requires only one circuit-breaker, and yet each breaker can be isolated without interrupting the power . Among them, the small busbar at the top of the high-voltage cabinet, although small in size, plays a crucial role. They are also used to connect high voltage equipment at. A busbar electrical system consists of a conductive metallic bar or a group of bars (typically made of copper or aluminium) designed to carry and distribute electrical current within a system. Account is taken of the need to isolate parts of the installations for purposes of cleaning and maintenance, and also of. In the power distribution, except for the line, we use the most is the switchgear, the structure of the switchgear is generally similar, mainly divided into busbar room, circuit breaker room, secondary control room (instrument room), feeder room, and there is generally steel plate isolation between. The common models for 10KV high voltage switchgear include the KYN28-12 medium-voltage switchgear and the XGN2-12 fixed high-voltage switchgear. In the KYN28 model, the circuit breaker is.