40.5KV High Voltage Circuit Breaker
40.5kv Handcart -type Indoor High Voltage AC Solid-closure Vacuum Circuit Breaker
NINGBO TIANAN (GROUP) CO., LTD.
overview
VT19-40.5EP type indoor HV vacuum circuit breaker is indoor switchgear,used for three-phase 50Hz,35KV electric power system. It is a control and protective unit,applied in electricutility of industrial and mining company ,power station and substation. Because of its special superiority, it is also suitable for the occasions requiring frequent operation rated working voltage or repeatedly break short-circuit current.It has reliable interlock function,and not only serves as handcart unit,but also as fixed unit.
Service condition
1.Ambient temperature:-40°C~+40°C.
2.Hight:≤2000 meters.
3.Earthquake intensity:Below level 8.
4.
|
Humidity condition |
Daily mean relative humidity |
≤95% |
Daily mean vapour pressure |
≤2.2×10-3MPa |
|
Monthly mean relative humidity |
≤90% |
Monthly mean vapour pressure |
≤1.8×10-3MPa |
5. No fire,water drop ,explosion, serious filthy, chemical corrosion and violent vibration of places.
6.Environment humidity: month average relative humidity ≤90%, daily average relative humidity ≤95%.
7.Customers have other special requirements, can be in order to put forward, our company can offer most satisfied.
Technical Parameters
| Rated voltage | 40.5kV | |||
| Rated frequency | 50Hz | |||
| Rated lighting impulse withstand voltage(between phases,phase to earth) /isolated fracture | 185 | |||
| Rated 1min power withstand voltage(between phases,phase to earth) /isolated fracture | 95 | |||
| Rated operation sequence | O-0.3s-CO-180s-CO | |||
| Rated current (A) | 630,1250 | 1250~3150 | 1250~3150 | 3150,4000 |
Mechanical Characteristics Parameters of CB
| Name | Unit | Data | |
| Clearance between Open contacts | mm | 18±1 | |
| Over-travel | 6±1 | ||
| Three-phase opening & closing non-synchronous | ms | ≤2 | |
| Bounce time of closing contact | ms | ≤3 | |
| Contact pressure of Closing Contact | Opening |
N |
20KA,25KA.31.5KA |
| Closing | 2000±200 2700±200 3100±200 | ||
| Average opening speed | m/s | 1.4~1.8 | |
| Average closing speed. | 0.5~0.9 | ||
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