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35kV~800kV Dead Tank Circuit Breaker

Main Page >> Circuit Breaker / 35kV~800kV Dead Tank Circuit Breaker / 35kV~550kV Live Tank Circuit Breaker / 35kV Vacuum Circuit Breaker

LW8-35

LW30-72.5

LW30-126T

LW30-252T

LW30-550T

LW30-800T

Product Characteristics
Dead tank circuit breaker, the interrupters are housed in porcelain insulators filled with SF6. 35kV to 145kV circuit breakers are equipped with spring operating mechanism. 252kV circuit breakers are equipped with spring and hydraulic spring operating mechanism. 550kV and 800kV circuit breakers are equipped with hydraulic spring operating mechanism. They all adopt self-energized arc extinguishing principle of "thermo-blast and auto-puffer". The circuit breaker can be used to control and protect and also can be used as contact circuit breakers to switch the capacitor bank.
Product Parameters
Rated voltage (kV) 40.5 72.5 126 252 550 800
Rated current (A) 1600/
2000 		3150 3150 4000 5000 6300
Rated short circuit breaking current (kA) 25/31.5 40 40 50 63 63
Rated short time withstand current/duration (kA/s) 25/4
31.5/4 		40/4 40/4 50/3 63/3 63/3
Rated peak withstand current (kA) 63/80 100 100 125 160 171
Rated power frequency withstand voltage (kV) To earth 95 350 230 460 740 960
Between open contacts 118 410 230+
70 		460+
145 		740+
315 		960+
462
Rated lightning impulse withstand voltage (kV) To earth 185 160 550 1050 1675 2100
Between open contacts 215 200 550+
100 		1050+
200 		1675+
450 		2100+
650
Rated switching impulse withstand voltage (kV) To earth 1300 1550
Between open contacts 1175+
450 		1425+
650
Mechanical life (times) 10000 10000 10000 10000 10000