420 kV LT G.C.B. Introduction structure diagram Main technical data: 1 Rated Voltage kVrms 420 2 Rated Current Arms 4000/5000 3 Rated frequency Hz 50 4 Rated short-circuit breaking current kArms 50 5 Rated withstand current kApeak 135 6 Rated short time making current kArms 135 7 Rated short time withstand current(4 s) kArms 50 8 Rated power-frequency withstand Voltage kVrms 610 9 Rated power-frequency withstand Voltage kVpeak 520 10 Opening time ms < 24 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 37.5/45 15 Rated out-of-phase breaking current kArms 12.5 16 Rated out-of-phase breaking current Arms 400 17 Rated cable-charging breaking current Arms 400 18 Rated gas pressure MPa 0.6/0.5 19 First-pole-to-clear-factor pu 1.3 20 First-pole-to-clear-factor - Spring 21 Type operation - Triple pole 420 kV structure diagram of high voltage cylinder-type BACK ↑TOP
