12kV vacuum circuit breaker Each poles embedded in expoxy resin Rated current from 630A to 4000A Withdrawable or fixed type
12kV vacuum circuit breaker
CHFE 12kV series of indoor MV vacuum circuit breakers are used in the indoor switchgear rated 12 kV, 50(60)Hz. They are suitable for making different types of loads and frequent operation, to protect and control the electric equipments in industrial & mining enterprises, power plants and substations.
Main features:
· small size,
· water-condensation proof,
· high insulation,
· pollution-proof,
· low resistance,
· free maintenance.
Normal Service Condition
· Ambient temperature: -15 +40
· Altitude: no more 1000m
· Relative humidity: daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 90%
· Free from fire, explosion, heavy pollution, chemical corrosion and severe vibration.
· Earthquake intensity ≤ 8 degree
If the service condition differs from the above , the user should consult it with manufacturer.
Specification
No. | Item | Unit | Parameter | |||
1 | Rated voltage | kV | 12 | |||
2 | Rated frequency | Hz | 50/60 | |||
3 | Rated short-time power frequency withstand voltage(1 min) | kV | 42 | |||
4 | Rated lightning impulse withstand voltage | kV | 75 | |||
5 | Rated current | A | 630 1250 | 630 1250 | 1250 1600 2000 | 12501600 20002500 3150 |
6 | Rated short-time withstand current | kA | 20 | 25 | 31.5 | 40 |
7 | Rated peak withstand current | kA | 50 | 63 | 80 | 100 |
8 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 |
9 | Rated short-circuit making current | kA | 50 | 63 | 80 | 100 |
10 | Rated operating sequence | / | O-0.3s-CO-180s-CO O-180s-CO-180s-CO40kA | |||
11 | Short-circuit current breaking times | times | 274 | |||
12 | Rated capacitor bank breaking current | A | 630/400 | |||
13 | Mechanical endurance | times | 10000 | |||
VJ12 High Voltage Indoor Vacuum Circuit Breaker 12/24kV VCB
