CT14-35KV Spring Operating Mechanism, 35KV SF6 Operating Mechanism, Spring Mechanism for High-Voltage Circuit Breakers
Contact Info
- Xiangyang Industrial Zone, Liushi Town, Yueqing City,
- 李经理
- 15167417505
- 864640886@qq.com
The CT14 operating mechanism is a spring operating mechanism used for 35kV high-voltage circuit breakers (such as the LW8-35 type SF6 circuit breaker), and is widely applied in the control and protection of power transmission and distribution systems. According to public data (as of March 2026), its core information is as follows:
Specifically designed for operating the LW8-35 type outdoor high-voltage SF6 circuit breaker.
Suitable for 35kV power transmission and distribution systems, meeting the requirements of GB1984 "AC High-Voltage Circuit Breakers" and IEC standards.
Energy storage method: Electric + manual (two options available).
Energy storage motor:
AC/DC dual-purpose motor;
Rated voltage: -220V, ~220V (common);
Rated current: Approximately 4–7A;
Operating voltage range: 85%–110% of the rated voltage;
Energy storage time: ≤15 seconds (under rated voltage).
Manual energy storage:
Uses a Φ20×700mm handle;
Operating force <375N (approximately 38kgf).
Output characteristics:
Working angle of the output shaft: 57°–60°;
Closing energy: 1000J.
Auxiliary switch: Model F10-II/W2, with 8 normally open + 8 normally closed contacts, long-term current carrying capacity ≥10A.
Service life: 6000 operations.
Weight: Approximately 140–141kg.
Dimensions: 525×707×425 mm (width × height × depth).
Clamp-type structure, floor-mounted installation.
Energy storage system: Adopts a ratchet-drive plate-eccentric wheel mechanism, matched with a closing spring.
Closing holding and tripping: Uses a roller-cylindrical surface latch + half-shaft mechanism.
Closing transmission: Cam-four-bar linkage mechanism.
Mechanical interlock: Cannot close again when in the closing position, preventing misoperation.
Automatic reclosure: Supports one-shot automatic reclosure of "open – 0.3s – close".
Altitude: ≤2000m (some sources state ≤2500m or 4000m for plateau-type);
Ambient temperature: -30℃ to +40℃;
Wind speed: ≤35m/s;
Free of explosion, corrosion, severe vibration, and severe pollution (pollution grade is generally Grade III).
Common faults and maintenance key points Typical faults:
Energy storage motor does not start or insufficient energy storage;
Closing/opening coil burned or stuck;
Auxiliary switch poor contact;
Mechanical sticking (such as abnormal engagement of the half-shaft).
Maintenance suggestions:
Regularly check lubrication (transmission parts every six months);
Conduct electrical and mechanical characteristic tests annually in combination with pre-tests;
Check whether the heater, limit switch, and interlock device are normal
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