345 kV 4000/6000 A 63 kA G.C.B Introduction 345kV GCB Layout 345kV GCB structure diagram Type: OFPTB-300-63L Main technical data: 1 Rated Voltage kVrms 345 2 Rated maximum Voltage kVrms 362 3 Rated frequency Hz 60 4 Rated frequency Arms 4000/6000 5 Rated short-circuit breaking current kArms 63 6 Rated short time withstand current(3s) kArms 63 7 Rated power-frequency withstand Voltage kVrms 555 8 Rated Lightning impulse withstand Voltage kVpeak 1300 9 Rated Switching impulse withstand Voltage kVpeak 950 10 Rated Switching impulse withstand Voltage cycle 2 11 Rated delay trip time second 1 12 Standard duty cycle for breaker - CO-15sec-CO 13 Operation duty cycle for breaker - 0-0.3sCO-180S-CO 14 Rated SF6 pressure(20 ℃) kgf/cm.G 5.5 15 SF6 leakage rate % / year 0.5 16 Control Voltage DC(V) 125 17 Operation mechanism for breaker - Pneumatic 345kV GCB Layout 345kV GCB structure diagram BACK ↑TOP
