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The 66KV tank type SF6 circuit breaker, model LW36-66, is used in 66KV (126KV) power transmission and distribution systems with a rated frequency of 50Hz three-phase AC. It can also be used as a tie breaker and for switching capacitor banks. This SF6 circuit breaker features a compact structure, small footprint, and requires minimal installation work. It also meets the requirements for oil-free switching and has a mechanical life of up to 10,000 operations.
1. Single-phase terminal block (aluminum plated with silver)
2. 66KV outgoing bushing (high-strength aluminum porcelain)
3. Built-in CT (through-type bushing)
4. Arc extinguishing chamber (floor-mounted tank type)
5. Mechanism box (including operating mechanism and secondary panel)
6. Channel steel support (120mm)
7. Grounding block (4 locations)
1. Strong product performance, high rated current carrying capacity, reaching 3150A.
2. Long product life, electrical life of 31.5kA*24 cycles, and mechanical life of up to 10,000 cycles.
3. Reliable sealing, SF6 annual leakage rate <0.5%.
4. 66KV Tank Type SF6 Circuit Breaker is suitable for harsh operating environments, including IV pollution levels and temperatures ranging from -40°C to +40°C.
Circuit Breaker Technical Specifications
|
Rated voltage |
66KV |
|
Power frequency withstand voltage (5 min) of SF6 gas at zero gauge pressure. |
84KV |
|
Rated frequency |
50Hz |
|
Rated current |
3150A |
|
Initial level coefficient |
1.5 |
|
Rated short-circuit making current (peak value) |
80kA |
|
Rated short-circuit withstand current |
31.5kA |
|
Rated peak withstand current |
80kA |
|
Rated short-circuit duration |
4s |
|
Rated out-of-step breaking current |
8kA |
|
Rated line charging and switching current |
10A |
|
Rated sulfur hexafluoride gas pressure (gauge pressure at 20℃) |
0.5Mpa |
|
Annual SF6 gas leakage rate |
<0.5% |
|
Mechanical life |
10,000 times |
|
The weight of SF6 gas filled into each unit. |
10kg |
|
Weight of each circuit breaker |
1800kg |
|
Auxiliary circuit voltage |
DC220V/110V |
|
Opening and closing coil voltage/current |
DC110/4;DC220/2 |
|
Motor energy storage time |
≤15s |
|
Heater and lighting circuit voltage |
AC220V |
|
Auxiliary switch rated voltage |
DC220V/AC220V |
|
Auxiliary switch rated current |
10A |
|
Energy storage motor power |
600W |
Address
Jinlu Industrial Zone, Beibaixiang Town, Yueqing City, Wenzhou City, Zhejiang Province, China
