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ZW32-12MF Permanent Magnet Vacuum Circuit Breaker
When a fault occurs in the T-connected branch line of a 12kV overhead distribution line or in the end user, the protection action time limit of the incoming switch cannot be reasonably adjusted with the protection time limit of the substation outgoing switch, which will cause the substation outgoing switch to trip. If the fault is permanent and the substation reclosing will fail, a local fault in the medium-voltage user boundary will cause the entire 12kV distribution line to be shut down.
If an outdoor boundary circuit breaker is installed at the T-connection or user end (responsibility boundary point), after confirming that a fault (overcurrent, short circuit, single-phase grounding, etc.) has occurred in the user boundary, the fault is automatically isolated, which can ensure normal power supply to users in non-fault areas.
The application of ZW32-12M outdoor high-voltage permanent magnetic vacuum circuit breaker on 12kV feeder overhead lines can avoid the joint fault power outage of fault-free lines, reduce the scope of fault power outage, shorten the power outage time of users, and protect the safe operation of the main network. It also has fault detection, protection control and communication functions, and can automatically cut off single-phase grounding faults and automatically isolate interphase short-circuit faults. The installation point is used at the responsibility demarcation point of the 12kV distribution line user incoming line, and can also be used at the branch line connection that meets the requirements.
Outline and installation size (mm):
Working Conditions:
- Ambient temperature: not higher than +40℃, not lower than -40℃;
- Relative humidity: daily average value not greater than 95%, monthly average value not greater than 90%;
- Altitude not exceeding 2000 meters;
- Wind pressure not exceeding 700Pa (equivalent to wind speed 34m/s);
- Earthquake intensity not exceeding 8 levels;
- No fire, explosion, serious pollution, chemical corrosion or severe vibration.
Main Technical Parameters of Circuit Breaker：
| Project | Parameter | ||
| Rated voltage | 12kv | ||
| Rated current | 630A, 1250A | ||
| Rated frequency | 50Hz | ||
| Power frequency withstand voltage (1min) | Dry type (phase to phase, to ground/break) | 42kv / 48kv | |
| Wet test (to ground, external insulation) | 34kv | ||
| Lightning impulse withstand current (peak value) (phase to phase, to ground/break) | 75kA / 85kA | ||
| Rated short-circuit breaking current | 20kA | 25kA | |
| Rated short-circuit making current (peak value) | 50kA | 63kA | |
Main Mechanical parameters of Circuit Breaker:
| Project | Parameter | |
| Rated peak withstand current | 50kA | 63kA |
| 4S short-time withstand current | 20kA | 25kA |
| Rated operating cycle | Open -0.3s- Close Open -180s- Close Open | |
| Rated short-circuit current breaking times | 30 Times | |
| Mechanical life | 30000 Times | |
| Secondary circuit 1min power frequency withstand voltage | 2kv | |
| Contact opening distance | 9±1 mm | |
| Contact overtravel | 2.5 ±1 mm | |
| Opening speed | 1.1 ±0.3 m/s | |
| Closing speed | 0.6 ±0.2 m/s | |
| Contact closing bounce time | ≤ 2 ms | |
| Phase center distance | 340 ±2 mm | |
| Three-phase opening and closing out of phase | ≤ 2 ms | |
| Conductive circuit resistance of each phase | ≤ 80(with isolation ≤ 150) | |
| Weight | about 70kg | |
Keywords
ZW32-12MF outdoor high voltage permanent Magnet Vacuum Circuit Breaker
隐藏域元素占位
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- 产品描述
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- Commodity name: ZW32-12MF outdoor high voltage permanent Magnet Vacuum Circuit Breaker
When a fault occurs in the T-connected branch line of a 12kV overhead distribution line or in the end user, the protection action time limit of the incoming switch cannot be reasonably adjusted with the protection time limit of the substation outgoing switch
ZW32-12MF Permanent Magnet Vacuum Circuit Breaker
When a fault occurs in the T-connected branch line of a 12kV overhead distribution line or in the end user, the protection action time limit of the incoming switch cannot be reasonably adjusted with the protection time limit of the substation outgoing switch, which will cause the substation outgoing switch to trip. If the fault is permanent and the substation reclosing will fail, a local fault in the medium-voltage user boundary will cause the entire 12kV distribution line to be shut down.
If an outdoor boundary circuit breaker is installed at the T-connection or user end (responsibility boundary point), after confirming that a fault (overcurrent, short circuit, single-phase grounding, etc.) has occurred in the user boundary, the fault is automatically isolated, which can ensure normal power supply to users in non-fault areas.
The application of ZW32-12M outdoor high-voltage permanent magnetic vacuum circuit breaker on 12kV feeder overhead lines can avoid the joint fault power outage of fault-free lines, reduce the scope of fault power outage, shorten the power outage time of users, and protect the safe operation of the main network. It also has fault detection, protection control and communication functions, and can automatically cut off single-phase grounding faults and automatically isolate interphase short-circuit faults. The installation point is used at the responsibility demarcation point of the 12kV distribution line user incoming line, and can also be used at the branch line connection that meets the requirements.
Outline and installation size (mm):
Working Conditions:
- Ambient temperature: not higher than +40℃, not lower than -40℃;
- Relative humidity: daily average value not greater than 95%, monthly average value not greater than 90%;
- Altitude not exceeding 2000 meters;
- Wind pressure not exceeding 700Pa (equivalent to wind speed 34m/s);
- Earthquake intensity not exceeding 8 levels;
- No fire, explosion, serious pollution, chemical corrosion or severe vibration.
Main Technical Parameters of Circuit Breaker：
Project Parameter Rated voltage 12kv Rated current 630A, 1250A Rated frequency 50Hz Power frequency withstand voltage (1min) Dry type (phase to phase, to ground/break) 42kv / 48kv Wet test (to ground, external insulation) 34kv Lightning impulse withstand current (peak value) (phase to phase, to ground/break) 75kA / 85kA Rated short-circuit breaking current 20kA 25kA Rated short-circuit making current (peak value) 50kA 63kA Main Mechanical parameters of Circuit Breaker:
Project Parameter Rated peak withstand current 50kA 63kA 4S short-time withstand current 20kA 25kA Rated operating cycle Open -0.3s- Close Open -180s- Close Open Rated short-circuit current breaking times 30 Times Mechanical life 30000 Times Secondary circuit 1min power frequency withstand voltage 2kv Contact opening distance 9±1 mm Contact overtravel 2.5 ±1 mm Opening speed 1.1 ±0.3 m/s Closing speed 0.6 ±0.2 m/s Contact closing bounce time ≤ 2 ms Phase center distance 340 ±2 mm Three-phase opening and closing out of phase ≤ 2 ms Conductive circuit resistance of each phase ≤ 80(with isolation ≤ 150) Weight about 70kg
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