Products

VBI-12 Indoor High Voltage Vacuum Circuit Breaker

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. VBI-12 Indoor High Voltage Vacuum Circuit Breaker is three-phase AC 50Hz, Rated voltage of 12kV indoor device, for industrial and mining enterprises, power plants and substations as electrical equipment control and protection purposes, and for frequent operation of the place.

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

VBI 12 Indoor High Voltage Vacuum Circuit Breaker (3)