1．General

HVD85(ZN85)  40.5KV indoor vacuum circuit breaker VCB is suitable for three-phase AC power system of 50Hz and 36kV, used to make and break the load current, overload current and fault current in industrial and mining enterprises, power plants and transformer substations, meanwhile, it is suitable for the occasion where the frequent operation is required.

2. Service conditions

2.1The ambient air temperature should be -15℃~40℃, the daily average temperature should not exceed 35℃.

2.2 Daily mean relative humidity should not exceed 95%, and the daily mean vapor pressure should not exceed 2.2kPa; the monthly mean relative humidity should not be higher than 90%, and the monthly mean vapor pressure should not exceed 1.8kPa.

2.3 Altitude: Not exceed 1,000m.

2.4 The ambient air should be free from the dust, smoke, corrosive and flammable gas, steam, salt fog, et… 

Main specifications and technical parameters

Rated voltage: 40.5KV

Power frequency withstand voltage: 95 kv

Lighting impulse withstand voltage: 185 kv

Rated current: 1000A, 1250A, 1600A, 2000A

Rated short-time withstand current: 25KA, 31.5KA

Rated peak value withstand current: 63KA, 80KA

Rated short-circuit duration: 4 s

Rated short-circuit breaking current: 25KA, 31.5KA

Rated short-circuit making current: 63KA, 80KA

Rated operation sequence: O-0.3s-CO-180s-CO

Breaking time: <80 ms

Rated short-circuit current breaking times: 20 times

Single capacitor bank breaking current: 630A

Back-to-Back capacitor bank breaking current: 400A

Rated control voltage v: AC110、220；DC110、220

Mechanical life: 10,000 times

 Overall and installation dimensions

1. Opening spring  

2.Main shaft  

3.Regulating lever of intermediate phase  

4.Driving rod

5. Driving board 2   

6.Contac spring  

7.Driving board 3  

8.Driving board 4  

9.Driving board 1  

10. Regulating lever of side phase  

11.Rod end bearing