550 kV LT G.C.B Introduction structure diagram Main technical data: 1 Rated Voltage kVrms 550 2 Rated Current Arms 6000 3 Rated frequency Hz 50 4 Rated frequency kArms 40 5 Rated withstand current kApeak 170 6 Rated short time making current kArms 170 7 Rated short time withstand current(3 s) kArms 63 8 Rated power-frequency withstand Voltage kVrms 740/1055 9 Rated Lightning impulse withstand Voltage kVpeak 1675/1675+450 10 Opening time ms < 20 11 Closing time ms < 100 12 Breaker time ms < 40 13 Rated operating sequence - O-0.3 s-CO-180 s-CO 14 Short-line fault breaking current(L75/L90) kArms 47.25/56.7 15 Rated out-of-phase breaking current kArms 15.75 16 Rated line-charging breaking current Arms 500 17 Rated cable-charging breaking current Arms 500 18 Rated gas pressure MPa 0.6/0.5 19 First-pole-to-clear-factor pu 1.3 20 Method operation - Hydraulic 21 Type operation - Single pole 550 kV structure diagram of high voltage cylinder-type BACK ↑TOP
