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VACUUM CIRCUIT BREAKERS
VACUUM CIRCUIT BREAKER The ВВK 1(2)-10-20/630 (1000) У3 vacuum circuit breakers are three-phase electric devices with electromagnetic drive and mechanical gate ensuring reliable fixation of the device while it is operational. Such vacuum circuit breakers are designated for commutation of electric circuits under normal as well as emergency operation modes in three-phase alternating current networks of 50 Hz frequency and 10 kV voltage. They are supposed for installation within dispatching control units and monitoring/signaling units, including the possibility of replacing the oil circuit breakers. The devices are equipped with the vacuum arc chutes of our ow manufacture. The control circuit of the electromagnetic drive of these vacuum circuit breakers is located within the housing of the device and is easy to use. The design of the lithium caps made of a firm material of Lexan-type ensures reliable protection of the vacuum chambers against the environmental impacts. Technical Properties Nominal voltage, kV | 10 | Maximum operating voltage, kV | 12 | Nominal current, A | 630 (1000) | Electrical (transient) resistance of each terminal of the main circuit, micro Ohm, not exceeding | 75 (60) | Nominal breaking current, kА | 20 | Normalized parameters of making current, kА: - initial actual value of periodic component - maximum peak | 20 52 | Normalized parameters of the short-circuit steady leakage current, kА: - maximum peak (electrodynamics endurance current) - mean-square value of the current over the time of its flowing (thermal endurance current for a period of three 3 seconds) - initial actual value of periodic component | 52 20 20 | Normalized abundance of unidirectional component, %, not exceeding | 40 | Intrinsic turn-on time, sec, not exceeding | 0,075 | Intrinsic disconnection time, sec, not exceeding | 0,050 | Total disconnection time, sec, not exceeding | 0,075 | Supply voltage of control circuit (direct or alternating), V | 220 | Current consumption: -operational chain (impulses not longer than 250 ms), A, not more than -switch-on chain during switch-on operation, A, not more than -switch-off chain during switch-off operation, A, not more than | 15 0,5 3,2 | Commutation resource (number of cycles): - under nominal current - under nominal breaking current | 75000 100 | Range of ambient temperatures, C | – 40C … +55C | Dimensions, mm | 550 х 216 х 688 | Weight of device, kg | 72 (74) |
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