The LW36-40.5 SF6 circuit breaker has an outdoor porcelain post-type structure, equipped with the CT35 spring operating mechanism. The mechanism is arranged in a “T” configuration with the body, making the entire unit compact, lightweight, simple in structure, with low operating power, and easy installation and commissioning. The mechanical life is 10,000 operations, making it suitable for frequent operations. It adopts a compressed air arc-extinguishing chamber with excellent breaking performance, and its electrical life reaches 20,000 operations.
The sealing performance is reliable, with static seals using “O”-shaped sealing rings and dynamic seals using “V”-shaped sealing rings with spring pressure compensation structures. The secondary wiring board for the current transformers is produced using pressure injection molding, providing strong anti-aging performance and ensuring an annual leakage rate of <0.5%.
The installation frame and support are made from rolled steel plates, using high-strength standard components, ensuring high mechanical reliability. The internal or external current transformers use microcrystalline alloy materials with high magnetic conductivity, and the accuracy class can reach 0.2 or 0.2S. The product can be equipped with 2 to 4 current transformers per phase.
No. Parameter Name Unit Parameter Value 1 Rated voltage kV 40.5 2 Rated current A 1600 / 2000 3 Rated insulation level kV 95 (Grounded) / 185 (Contact gap) 4 Rated short-circuit breaking current kA 25 / 31.5 5 Rated out-of-step breaking current kA 7.9 / 10 6 Different-phase ground fault breaking current kA 27.4 / 34.8 7 Rated breaking current of single capacitor bank A 400 8 Rated operating sequence – O—0.3s—CO—180s—CO* 9 SF6 gas rated pressure (20℃ gauge pressure) MPa 0.45 10 Opening time (rated voltage) ms 30 ≤ t ≤ 40 11 Closing time (rated voltage) ms 60 ≤ t ≤ 80 12 Rated short-circuit making current (peak) kA 63 / 80 13 Rated short circuit duration s 4 14 Rated short-time withstand current kA 25 / 31.5 15 Rated peak withstand current kA 63 / 80 16 Mechanical life test Times 10,000 17 Accumulated breaking times (31.5kA/40kA short-circuit) Times 20 18 Rated current cumulative breaking times Times 2000 19 SF6 gas annual leakage rate % ≤0.5 20 SF6 gas trace moisture content ppm (V/V) ≤150×10⁻⁶ 21 External insulation leakage specific distance mm/kV ≥25 / ≥31** 22 Circuit breaker weight kg 1000
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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