VBI type vacuum circuit breaker conforms to national standard GB1984-2003 HV Vacuum Circuit Breaker, JB3855-1996<3.6-40.5kV indoor AC high voltage vacuum circuit breaker>, DL/T403-2000<12kv-40.5kv HV vacuum circuit breaker ordering technical conditions>, and IEC62271-100:2001 high voltage AC circuit breaker relevant regulations.
The VBI-12 indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz device rated at 12kV, featuring key 12kV vacuum circuit breaker components like vacuum interrupters and spring operating mechanisms for superior arc extinction. It protects and controls electrical equipment by interrupting load currents, overloads, and short-circuits in industrial/mining enterprises, power plants, substations, and frequent-operation sites, compatible with KYN28A handcart or XGN fixed switchgear.
As leading manufacturers and suppliers, KamPA Electric offers this withdrawable/fixed unit with high breaking capacity, long mechanical life, compact design, low maintenance, compliance to IEC 62271-100/GB1984 standards, and B2B options like OEM/ODM, private label, customization for electrical contractors, distributors seeking wholesale from China factories at competitive prices
Applying Ambient Conditions
1. Ambient temperature is not greater than +40 ℃, not less than -10 ℃ (allow storage at -30 ℃);
2. Altitude below 1000m;
3. Daily average daily relative humidity of not more than 95%, the monthly average of not more than 90%; saturated vapor pressure daily average of not more than 2.2 * 10-3MPa, the monthly average of not less than 1.8 * 10-2MPa, When the temperature drops sharply, it may condense;
4. Earthquake intensity does not exceed 8;
5. No fire, explosion, serious pollution, chemical corrosion and severe vibration of the place.
PS: Products with special requirements, specifications and dimensions that need to be improved can be designed and manufactured according to user requirements.
Product Paramenters
| Name | Unit | Data | |
| Rated voltage | KV | 12 | |
| Rated insulation level | 1min Power frequency withstand voltage | KV | 42 |
| Rated lightning impulse withstand voltage | KV | 75 | |
| Rated current | A | 630 1250 2000 3150 | |
| Rated short circuit breaking current | KA | 20 25 31.5 40 | |
| Rated short-circuit opening and closing current (peak) | KA | 50 63 80 100 | |
| Rated dynamic current (peak) | KA | 50 63 80 100 | |
| Rated thermal stability current (rms) | KA | 20 25 31.5 40 | |
| Rated short circuit current breaking times | time | 50 20 | |
| Rated thermal stability time | s | 4 | |
| Rated operating sequence | / | O-0.3S-CO-180S-CO | |
| Mechanical life | time | 10000 | |
| Rated single capacitor bank breaking current | A | 630 | |
| Rated back to back capacitor bank breaking current | A | 400 | |
