YIFA indoor solid-sealed high voltage vacuum circuit breaker VCB VS1-12 series
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Indoor high voltage switchgear with three-phase AC 50 Hz and rated voltage of 7.2-12 kV, and reliable interlocking function.
Product Description
VS1-12 indoor solid-encapsulated HV vacuum circuit breaker (hereinafter referred to as circuit breaker)is an indoor three-phase AC high-voltage switchgear of 50Hz and rated voltage 7. 2-12KV. This circuit breaker accords with our national standards like GB/T1984 Alternating Current High-voltage Circuit Breaker,JB3855 3.6-40.5kV Indoor Alternating Current High-voltage Vacuum Circuit Breaker as well as relevant IEC standards, it has the reliable interlocking function. Designed into fore and rear separate structure, it is used as the unit for fixed installation, in addition, it can be assembled with the chassis, as the individual handcart.
Function features
1. Employing the mature APG technique and advanced epoxy-resin solid encapsulation technology, the vacuum arc-extinguishing chamber, main conductive circuit, insulating support, etc. are combined organically to form a integrated solid-encapsulated pole, the surface of vacuum arc-extinguishing chamber is not affected with the environment, so as to really realize the maintenance free.
2. Ultra-low-resistance type vacuum interruption meets the requirements of temperature rise of large current type, and lowers the energy loss.
3. Owning to the modular spring operating mechanism, it presents the simple structure and stable performance.
4. Miniature design, the phase-to-phase distance is shorten by 30-60mm.
| Item | Unit | Parameter | |
| Rated voltage | kV | 12 | |
| Rated frequency | Hz | 50 | |
| Rated lighting impulse withstand voltage (peak) | kV | 75 | |
| Rated (1 min) line frequency withstand voltage (effective value) | kV | 42 | |
| Rated operating sequence | A | O-0.3s- CO-180s-CO | |
| Rated current | kA | 630 | 1250 |
| Rated short circuit dropout current | kA | 20 25 | 25 31.5 |
| Rated shot circuit close current (peak) | s | 50 63 | 63 80 |
| Rated short circuit duration | 4 | ||
| Open circuit times of rated short circuit dropout current | times | 30 | |
| Mechanical life | times | 10000 | |
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