Combination electrical equipment: It is a kind of electrical equipment that integrates several types of electrical equipment in accordance with the main wiring requirements. It has a compact structure, occupies less space, is convenient for maintenance, and can reduce the workload of on-site installation. There are open type and fully enclosed type.

Open type; Open design; Open style

It is composed of a low-oil circuit breaker as the main body, combined with disconnectors (sockets), YH and LH. It is commonly used in 35, 110 and 220KV high-voltage switch stations.

2. Fully Enclosed Type

It is mainly composed of SF6 circuit breaker. The disconnectors, YH, LH, BL, grounding switches, busbars, cable terminals and lead-out bushings are combined together, and transition elements such as elbows, three-way valves and bellows are also used. The high-voltage live parts are sealed in the metal shell of the grounded enclosure, and SF6 gas is filled inside as the insulation, arc-extinguishing and heat-transmission medium.