126KV Outdoor HV AC Self Extinguishing SF6 Circuit Breaker

LW49-126 Outdoor HV AC Self Extinguishing SF6 Circuit Breaker is used in the electrical system of 3-phase AC 50Hz, 110 KV, as its control and protective equipment, and also a connecting circuit breaker for switching loading current, cutting-off fault current and switching over power circuit through various wiring ways in the power plant and substation.

Product standard: This circuit breaker is compliant with GB1984-2003 HV AC Circuit Breaker and IEC 56 HV AC Circuit Breaker. It is insulated and arc-extinguished by SF6, complying with self-extinguishing principle. Working with the spring actuator, it has the following features: Powerful breaking capability, long electric life of 20 times, lower active power, and high reliability.

Strong ability of breaking, CB uses self-extinguishing principle, with high breaking and closing ability. Whole annul leak rating<0.02%( O ring uses Sino-America joint company PAK company, the mould and material made in America)

Micro moisture of arc extinguishing chamber <100ppmV/V

Micro moisture of other chambers <150ppm V/V Serial no Item Unit Data
1 Rated voltage KV 126
2 Rated frequency Hz 50
3 Rated current A 3150
4 Rated short-circuit breaking current kA 40
5 Rated short-circuit makeup current (peak) kA 100
6 Rated peak withstand current kA 100
7 Rated short-time withstand current kA 40
8 Rated short-circuit duration s 4
9 Electrical life times 20

10 Rated power frequency withstand voltage Over earth, between phases kV 230 Between fractures kV 265
11 Rated lightning pulse withstand voltage Over, between phses kV 550 Between fractures kV 630
12 Rated out-of-step breaking current kA 10
13 Rated circuit charging breaking current A 31.5
14 Near-field fault breaking current kA 36.30
15 Main loop resistance
16 Mechanical life times 10000
17 Rated pressure of SF6 (Guage at 20C) Mpa 0.6
18 Alarming purssure of SF6 (Guage at 20C) Mpa 0.55
19 Locking purssure of SF6 (Guage at 20C) Mpa 0.5

20 Creepage distance mm 3150, 3906
21 Rated operation squence 0-0.3s-CO-180s-CO
22 Radio interference level
23 Yearly leakage rate of SF6 %
24 Water content of SF6 Ppm
25 Mass of SF6 for each circuit breaker Kg 10
26 Mass of each circuit breaker Kg 1800
27 Break-break force (downward) N 25000
28 Close-brake force (upward) N 15000