ABB

Prevention of incorrect opening/closing of circuit breakers: Mechanical interlock: The operating handle must be inserted into a specific position and operated in sequence, directly restricting incorrect opening/closing. Electrical interlock: The closing circuit of the circuit breaker is connected in series with the auxiliary contact of the disconnector. Closing is prohibited if the disconnector is not fully closed.Prevention of load-breaking operation of disconnectors: Mechanical interlock: The

The role of busbars in switchgear：Busbars are conductors in switchgear that collect, distribute, and transmit electrical energy. They connect the power source (such as the output terminal of a transformer) to various branches (such as the incoming terminals of circuit breakers), acting as a transfer station for electrical energy. This enables electrical energy to be distributed to different electrical equipment or circuits as required.Methods for selecting appropriate busbars：Current - carrying

Insulation Performance： Air - insulated Circuit Breakers: They use air as the insulating medium. The insulation performance of air is relatively limited. In harsh environments such as high humidity and high pollution, the insulation performance is easily affected. They are suitable for medium - and low - voltage applications. Gas - insulated Circuit Breakers: Commonly, gases such as sulfur hexafluoride (SF6) are used. They have excellent insulation performance and can withstand higher voltages,