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.

No. Item Unit Date
1 Rated voltage KV 40.5

Rated insulation


1min power frequency

withstand voltage

Dry test KV 95
Wet test 80
Lightning impulse withstand voltage(peak value) 185
3 Rated current A 1600 2000
4 Rated short-circuit breaking current KA 20 25 31.5
5 Rated short-circuit making current(peak) KA 50 63 80
6 Rated operating sequence O-0.3s-CO-180s-CO
7 Rated short-time withstand current KA 20 25 31.5
8 Rated peak withstand current KA 50 63 80
9 Rated short-circuit duration S 4
10 Rated control voltage V AC220,110;DC220,110
11 Rated short-circuit breaking current break times Times 20
12 Full-break time ms ≤80
13 Mechanical life Times 10000

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.