The withdrawable vacuum circuit breaker is a high-voltage circuit breaker with a trolley structure, including a fully enclosed pole with integrated main circuit, a trolley frame assembly with a three-phase main shaft, an independently installed spring operating mechanism and a trolley swing-in device. It is mainly used to realize circuit breaking and protection in power systems. Its core features are as follows:
Structural composition
Solid-sealed pole: Contains an insulating shell and a vacuum arc extinguishing chamber, and the moving and static contacts are connected by an insulating pull rod to support fast opening and closing operations.
Trolley frame: Contains a three-phase main shaft, which is connected to the propulsion device by bolts to realize the extraction and pushing of the circuit breaker.
Actuating mechanism: Independently installed, including a spring operating mechanism (such as an electromagnet, a motor, etc.), supports fast opening and closing actions.
Technical advantages
Easy maintenance: The insulating shell is detachable, which is convenient for repairing and replacing the arc extinguishing chamber or contacts.
Reliable operation: Suitable for frequent operation scenarios to meet the needs of short-circuit current breaking.
Lightweight: Compared with the traditional open structure, it is smaller and lighter.
Application scenarios
Mainly used in 12kV and below distribution networks, such as central cabinets, switch cabinets, etc. Common models include ZN63-12/630-20 (12kV, rated current 630A), etc.
Technical improvement direction
Modern products reduce contact resistance and improve heat dissipation performance by optimizing the connection method between the sealed pole and the vacuum interrupter (such as bolt transition connection). The trolley can be easily shaken in and out.
Shaanxi West Power Tongzhong Electrical Co., Ltd.
Our address
Nanpo Village, Chencang Avenue Jintai District Baoji City, Shaanxi Province, China.
Phone Number
+86 18091767067(WhatsApp/Wechat)
