The LN2-40.5 indoor SF6 circuit breaker is an indoor device designed for use in 50 Hz three-phase AC systems. It is suitable for industrial enterprises, power plants, and substations for protection and control purposes and can be used in locations requiring frequent operations. It can also be used as a link circuit breaker and for switching capacitor banks.
The LN2-40.5 model is equipped with the CT10-A spring operating mechanism but can also be paired with the CD101G electromagnetic operating mechanism.
No. Parameter Name Unit Parameter Value 1 Rated voltage kV 40.5 2 Maximum working voltage kV 40.5 3 Rated insulation level kV 185 (lightning impulse, full wave) /
95 (power frequency, 1 min)4 Rated frequency Hz 50 5 Rated current A 1250 6 Rated short-circuit breaking current kA 25 7 Rated operating sequence – O—0.35s—CO—180s—CO* 8 Rated short-circuit making current (peak) kA 63 9 Rated dynamic stability current (peak) kA 63 10 Rated thermal stability current kA 25 11 Rated thermal stability duration s 4 12 Switching current for a single capacitor bank A 400 13 Rated out-of-step breaking current kA 6.3 14 Accumulated breaking times (rated current) Times 2000 15 Accumulated breaking times (rated short-circuit) Times 16 16 Mechanical life – With CT10-A spring mechanism Times 6000 – With CD10IIG electromagnetic mechanism Times 5000 17 Closing time – Spring mechanism s ≤0.15 – Electromagnetic mechanism s ≤0.2 18 Inherent opening time (rated voltage) – Minimum operating voltage s ≤0.10 – Maximum operating voltage s ≤0.07 19 SF6 gas rated pressure (20℃ gauge) MPa 0.65 20 SF6 gas alarm pressure (20℃ gauge) MPa 0.42 21 SF6 gas lock pressure (20℃ gauge) MPa 0.4 22 SF6 gas annual leakage rate %/Year ≤1 23 SF6 gas moisture content ppm (V/V) ≤150 24 Rated operating voltage (CT10-A spring mechanism) – Closing coil V (DC) 48, 110, 220 – Opening coil V (DC) 48, 110, 220 – Motor V (DC) 110, 220 25 Rated operating voltage (CD10IIG electromagnetic mechanism) – Closing coil V (DC) 110, 220 – Opening coil V (DC) 48, 110, 220 26 Weight – Circuit breaker body kg 135 – SF6 gas kg 1.5
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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