Vacuum Circuit Breaker

HVD7-40.5 outdoor HV AC vacuum circuit breaker has many visual advantages like reasonable design, fashionable appearance, high safety and reliability, simple maintenance, long electric life. It is the ideal upgraded products of 35KV outdoor oil circuit breakers.
HVD7-40.5 vacuum circuit breaker is applicable for three-phase power system of AC 50HZ.It is used to make and break the load current ,overload current and short-circuit current.

1Rated voltageKV40.5

Rated insulation


1min power frequency

withstand voltage

Dry testKV95
Wet test80
Lightning impulse withstand voltage(peak value)185
3Rated currentA16002000
4Rated short-circuit breaking currentKA202531.5
5Rated short-circuit making current(peak)KA506380
6Rated operating sequenceO-0.3s-CO-180s-CO
7Rated short-time withstand currentKA202531.5
8Rated peak withstand currentKA506380
9Rated short-circuit durationS4
10Rated control voltageVAC220,110;DC220,110
11Rated short-circuit breaking current break timesTimes20
12Full-break timems≤80
13Mechanical lifeTimes10000

3.1The ambient temperature should be -30℃~ +40℃(-40℃ in the frosty area);
3.2Altitude should not exceed 2000m(over 2000m is plateau type);
3.3The wind pressure should not exceed 700Pa(equal to wind speed 34m/s);
3.4Air pollution degree: Ⅲ,that of antifouling type:Ⅵ;
3.5The installation site should be free from the fire, explosion, chemical corrosion and serious vibration.