Vacuum Circuit Breaker 12 KV VCB Indoor Switchgear Component

Description

Product Introduction The internal high-voltage vacuum circuit breakers of the VSV series are suitable for three-phase alternating current 50Hz, rated voltage 7.2...40.5kV, are widely used in power distribution of transformer substations, power plants, industrial and mining enterprises, buildings, for control and protection. Vacuum circuit breakers of the VSV series have the possibility of quick re-activation and frequent operation. Vacuum circuit breakers of the VSV series comply with the requirements of the following standards: IEC 62271-1, IEC 62271-100, IEC 60694, GB 1984-2003, JB/T 3885-2008, DL/T 403-2000. Product Features Fully enclosed poles with excellent electrical characteristics The main circuit of the VSV series vacuum circuit breaker has a fully enclosed structure with insulated tubular or integrated poles. 1. Insulated tubular structure The parts of the main chain are fixed vertically in a tubular insulated container. The insulating cylinder is made of epoxy resin using advanced AGP casting technology. Thus, it has good anti-arc, anti-aging and high-strength properties. This structural design makes it possible to prevent external influences on the vacuum arc extinguishing chamber, including external shocks, polluted environment, and effectively improve the ability to withstand rated short-term current (peak). 2. The structure of the built-in poles Small-sized vacuum arc extinguishing devices and other parts of the main circuit are directly embedded in the epoxy resin using advanced AGP technology. Not only the pole assembly process is simplified, but also the reliability of the vacuum arc extinguisher circuit is increased, and the surface of the vacuum arc extinguisher is free from external mechanical forces and the environment. The circuit breaker mechanism has excellent anti-corrosion characteristics and advanced design The structural part adopts super strong corrosion resistance and surface treatment with Zn-Co alloy from salt mist; the drive part adopts high hardness, high wear resistance, corrosion resistant surface treatment with Ni-P alloy. An oil-free graphite bearing of the international brand INA is used as a drive bearing, which has high strength and good abrasion resistance. The VSV series are Class C2 circuit breakers. During the shutdown of the capacitive current, the circuit breaker has an extremely low probability of severe breakdown, which meets the requirements for Class C2 circuit breakers. The circuit breakers of the VSV series belong to class E2. The circuit breakers have passed all the tests at the Senyang High Voltage Appartus Research Institute Test center and Xi'an High Voltage Appartus Research Institute Test Center, meeting the requirements of Class E2, the cut-off of the full short circuit current of the small current switch reaches 30 times, and the cut-off of the full short circuit current of the large current switch reaches 20 times. The VSV series is a class M2 circuit breaker. The mature integrated working mechanism has stable and reliable operation, as well as a long service life, which can be used in places with frequent operation. The circuit breaker can meet the requirements of the M2 class standard, the mechanical service life reaches 30,000 times. Buffers with excellent buffer characteristics are used A specially designed buffer can reduce the overshoot of the separation brake and the rebound of the circuit breaker reverse brake, thereby increasing the mechanical service life of circuit breakers. Insulating tension pole made of nylon material The insulating tension pole is made of nylon 66 plus fiberglass, which provides intensity and strength, as well as electrical characteristics. Technical parameters: Rated voltage: 12KV Rated insulation level Withstood supply frequency voltage (1 min)：Phase to phase, phase to ground and break 42/48 Voltage sustained by a lightning pulse (peak)：Phase to phase, phase to ground and breakage 75/85 Rated frequency: 50HZ Rated normal current(A): 630， 1250， 1600， 2000， 2500， 3150， 4000 Rated short circuit current (kV): 25 31.5 40 50 Rated short circuit current (peak): 63 80 100 125 Rated peak withstand current (peak): 63 80 100 125 Rated short-term sustained current (effective): 25 31.5 40 50 Rated short-circuit current in different phases: 21.8 27.4 34.8 43.5 Rated out-of-phase shutdown current: 6.25 7.875 10 12.5 Rated Short circuit current Shutdown time (Times): 30 20 Rated cable disconnection current (A): 25 Rated short-circuit current duration: 4s Operation sequence: O-0.3s-CO-180s-CO Rated breaking current for single/reverse capacitor bank (A): 630 丨 400 Mechanical Service Life (Times): 20000