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12Kv 24Kv Indoor Side Mounted Vacuum Circuit Breaker High Voltage VCB
Vacuum Circuit Breaker
Product descriptions
The product adopts a new type of circuit breaker operating mechanism,
- The primary part of circuit breakercan use solid-sealed pole poles of international brands, and the vacuum interrupter and main conductive circuit parts can be solid-sealed into a whole
- Protect the interrupter from impact, dust and condensation
- Strong environmental adaptability, greatly reducing operation and maintenance costs
- The operating mechanism is integrated with the circuit breaker body, which has been verified by type tests
- With E2 electrical life, M12 mechanical life
Environmental requirements:
- Ambient temperature: highest temperature + 4O℃, lowest temperature -15℃
- Environmental humidity: daily average relative humidity ≤95%, monthly average relative humidity: ≤90%, daily average vapor pressure ≤22×10-3MPa, monthly average vapor pressure ≤1.8×10-3MPa.
- Altitude: not more than 1000m;
- The earthquake intensity does not exceed 8 degrees;
- The surrounding air is not significantly polluted by dust, smoke, corrosive and/or flammable gas, steam or salt spray.
Note: If it exceeds the requirements of the above normal use environmental conditions, it is necessary to negotiate with the manufacturer.
Products based on standards:
Comply with GB1984-2003 “High Voltage AC Circuit Breaker”, JB3855-1996 “3.6-40.5KV) Indoor AC High Voltage Vacuum Circuit Breaker” DL/T403-2000 “12-40.5KV High Voltage Vacuum Circuit Breaker Ordering Technical Conditions” and IEC62271-100 :2001 related requirements
Technical parameters
| Parameter | Unit | Data | ||
| 1 | Rated voltage | KV | 12 | |
| 2 | Rated current | A | 630-1250 1250 1250 | |
| 3 | Rated short-circuit breaking current | KA | 20 25 31.5 | |
| 4 | Rated short-circuit closing current | KA | 50 63 810 | |
| 5 | Rated peak withstand current | KA | 50 63 80 | |
| 6 | 4s rated short-circuit withstand current | KA | 20 25 31.5 | |
| 7 | Rated insulation level | Operating withstand voltage (before and after rated opening) | KV | 42 (break 48) |
| Impulse withstand pressure (before and after rated breaking) | KV | 75 (break 85) | ||
| 8 | Rated sequence of operation | Minute-0.3s-sync Minute-180s-sync Minute | ||
| 9 | Mechanical life | TIMES | 1000 | |
| 10 | Rated short-circuit breaking current breaking times | TIMES | 50 | |
| 11 | Rated breaking voltage of operating mechanism (DC) | V | 110, 220 | |
| 12 | Rated breaking voltage of operating mechanism (DC) | V | 110, 220 | |
| 13 | contact opening distance | mm | 11±1 | |
| 14 | Overtravel (contact spring compression length) | mm | 3.5±0.5 | |
| 15 | Three-phase switching and closing bounce time | ms | ≤2 | |
| 16 | Contact closure bounce time | ms | ≤2 | |
| 17 | Average gate opening speed | m/s | 1.1±0.2 | |
| 18 | Average closing speed | m/s | 0.6±0.2 | |
| 19 | Switching time | At maximum operating voltage | s | ≤0.05 |
| At minimum operating voltage | s | ≤0.8 | ||
| 20 | Closing time | s | 0.1 | |
| 21 | Allowable cumulative thickness of wear on movable and static contacts |
mm | 3 | |
Drawing
