The VSV series indoor high voltage AC vacuum circuit-breakers are suitable for three-phase AC 50Hz, rated voltage7.2...40.5kV power system, widely used in power distribution of transformer substations, power plants, industrial and mining enterprises, buildings, for control and protection. The VSV series of vacuum circuit-breakers have the capability of fast reclosing and frequent operation.
The VSV series of vacuum circuit-breakers conform to the specifications of the following standards: IEC 62271-1, IEC 62271-100, IEC 60694, GB 1984-2003, JB/T 3885-2008, DL/T 403-2000.
Totally enclosed poles with excellent electrical performance
The main circuit of the VSV series vacuum circuit-breaker adopts totally enclosed structure with either insulated tubular canister or embedded poles.
a) Insulated tubular structure
The main circuit parts are attached vertically in a tubular insulated canister. The insulating cylinder is made from epoxy resin through advanced AGP casting technology. Thus it has good anti-arc, anti-aging, and high strength properties. With such structural design, it prevent the external effects to vacuum arc extinguish chamber including external shocks, polluted ambient effectively, improved the capacity of bearing rated short-time withstanding current (peak).
b) Embedded poles structure
Small-sized vacuum arc-extinguisher and other parts of main circuit are directly embedded in epoxy resin through advanced AGP technology. Not only the poles assembly process is simplified, but also the reliability of the vacuum arc-extinguisher loop is improved., and the surface of vacuum arc-extinguisher is free from the effects of external mechanical force and ambient.
Circuit-breakers mechanism has excellent corrosion prevention performance and advanced design
Structural member adopts super strong corrosion resistance and salt mist Zn-Co alloy surface treatment; driving member adopts high hardness, high wear resistance, corrosion resistant Ni-P alloy surface treatment. Drive bearing adopts international brand INA oil-free graphite bearing with high strength and good abrasive resistance.
The VSV series are circuit-breaker Class C2
During cut-off of capacitive current, circuit breaker has extremely low heavy breakdown probability, meeting the requirement of circuit-breakers Class C2.
The VSV series are circuit-breakers Class E2
The circuit-breakers passed all tests in Testing Center of Senyang High Voltage Appartus Research Institute and Testing Center of Xi'an High Voltage Appartus Research Institute, meeting the requirement of Class E2, cut-off full-capacity short circuit current of small current circuit breaker reaches 30 times, and cut-off full-capacity short circuit current of big current circuit breaker reaches 20 times.
The VSV series are circuit-breaker Class M2
Mature integrated operating mechanism has stable and reliable performance, and long service life,which can be used in places with frequent operation. The circuit breaker can meet the requirement of Standard Grade M2, mechanical service life is as high as 30,000 times.
Adopt buffers with excellent buffer performance
Specially designed buffer can reduce overshoot of brake separating and rebound of brake reversing of circuit breaker, thus enhancing the mechanical life of circuit-breakers.
Adopt insulating tension pole made of nylon material
Insulating tension pole adopts nylon 66 plus glass fiber material, ensuring intensity and toughness, as well as electrical performance.
| Item | Unit | Date | ||||
| Rated voltage | KV | 12 | ||||
| Rated insulation level | power frequency withstand voltage (1 min)： Phase to phase, phase to earth and break | 42 /48 | ||||
| Lightning impulse withstand voltage (peak)：Phase to phase, phase to earth and break | 75/85 | |||||
| Rated frequency | HZ | 50 | ||||
| Rated normal current | A | 630， 1250， 1600， 2000， 2500， 3150， 4000 | ||||
| Rated short circuit breaking current | kV | 25 | 31.5 | 40 | 50 | |
| Rated short circuit making current (peak) | 63 | 80 | 100 | 125 | ||
| Rated peak withstand current (peak) | 63 | 80 | 100 | 125 | ||
| Rated short time withstand current (effective) | 25 | 31.5 | 40 | 50 | ||
| Rated different phase short circuit breaking current | 21.8 | 27.4 | 34.8 | 43.5 | ||
| Rated out-of-phase breaking current | 6.25 | 7.875 | 10 | 12.5 | ||
| Rated short-circuit breaking current breaking times | Times | 30 | 20 | |||
| Rated cables breaking current | A | 25 | ||||
| Rated short time withstand current duration | s | 4 | ||||
| Operating sequence | O-0.3s-CO-180s-CO | |||||
| Rated breaking current for single / back to back capacitor bank | A | 630 丨 400 | ||||
| Mechanical life | Times | 20000 | ||||
