132kV / 145kV Outdoor HV AC Selbstlösch SF6

Product overview Outdoor HV AC Self Extinguishing SF6 Circuit Breaker is used in the electrical system of 3 phase AC 50Hz,132kV /145kV 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 GB 1984-2003 HV 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. Technical parameter Serial no Item Unit Data 1 Rated voltage KV 132/145 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 245 Between fractures kV 315 11 Rated lightning pulse withstand voltage Over earth,between phses kV 650 Between fractures kV 750 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 µΩ 40 16 Mechanical life times 10000 17 Rated pressure of SF6 (Guage at 20) Mpa 0.6 18 Alarming purssure of SF6 (Guage at 20) Mpa 0.55 19 Locking purssure of SF6 (Guage at 20) Mpa 0.5 20 Creepage distance mm 3625 21 Rated operation squence 0-0.3s-CO-180s-CO 22 Radio interference level µ V 500 23 Yearly leakage rate of SF6 % 1% 24 Water content of SF6 Ppm 150 25 Mass of SF6 for each circuit breaker Kg 10 26 Mass of each circuit breaker Kg 2000 27 Break-break force (downward) N 25000 28 Close-brake force (upward) N 15000