VBM8/VBM9-40.5 indoor high voltage vacuum circuit breaker
1.vacuum circuit breaker with IEC standard
2.high voltage vcb
3.OEMservice
4.ceramic metarial
VBM8/VBM9-40.5 indoor high voltage vacuum circuit breaker is a domestic leading product new product research and developed by our company. The main characteristic of dominant electric circuit is fixed in enclosed three-poles isolate cylinder. The brand new kind of operation mechanism is in front of the circuit, structure is simple and reliable. This kind of VCB is widely applied to electric factory, power grid, metallurgy, petrify, city infrastructure project such as air port, underground. It can protect and control cable, overhead line, transform and electromotor, generator and capacitor bank.
It has perfect mechanical and electric interlock device, extremely reliability and service life, ensure the safety of operator and the instrument. Each mechanical data are all sticks to GB1984, GB/T11022 and electric industrial standard DL403.IEC62271-100, IEC56 and other formulation of main industrial countries.
Ambient condition
1 Ambient temperature: max +40°C min -15°C(conveyance under -30°C is allowed)
2 Altitude: ≤1000m
3 Relative humidity: daily average relative humidity: ≤95%; monthly average relative humidity≤90%; daily average saturated vapor pressure ≤2.2*10-3 MPa; monthly average value ≤1.8*10-3 MPa
4 Earthquake intensity: ≤8 degree
5 The installation should be free from fire, explosion, severe vibration, chemical corrosion and serious pollution
Order instruction
Complete model and order quantity of the product
Rated current, rated voltage, rated short circuit breaking current
Rated voltage of operation mechanism open and close release, rated voltage of energy saving motor
Required accessory and quantity
Other requirement please contact with us directly
| Main Technical Data | ||||
| Rated voltage | kv | 40.5 | ||
| Rated lighting impulse withstand voltage(peak) | kv | 185 | ||
| Rated short-time power frequency withstand voltage(1min) | kv | 95 | ||
| Rated short-circuit breaking current | kA | 20 | 25 | 31.5 |
| Rated current | A | 630/1250 | 630/1250 | 1250/1600/ 2000/2500 |
| Rated peak withstand current | kA | 50 | 63 | 80 |
| Rated operations of short-circuit breaking current interruption | times | 20 | ||
| Rated duration of short circuit | s | 4 | ||
| Rated operating sequence | 0-0.3-CO-180s -CO | |||
| Circuit power voltage of opening and closing device | V | AC,DC220 AC,DC110 | ||
| Closing time | ms | 30~80 | ||
| Opening time | ms | 20~45 | ||
| Rated capacitor bank closing flow current | kA | 12.5(power frequence ≤1000Hz ) | ||
| Rated single/back to back capacitor bank breaking current | A | 630/400 | ||
| Mechanical life | times | 10000 | ||
Mechanical characteristics adjustment data
Rated contact stroke mm 20±2
Contact overtravel mm 6±1
Average opening speed m/s 1.7±0.2
Average closing speed m/s 0.95±0.35
Contact bouncing duration at closing operation ms ≤3
Three-pole simultaneity ms ≤2
Condactive circuit resistance of each phases μΩ <60
Note:Average opening means the average speed after moving and fixed contact separate 12mm
Average opening means the average speed before moving and fixed contact close in the distance of 12mm
Rated characteristics can be given on requirment
