ZW32-12MF outdoor high voltage permanent Magnet Vacuum Circuit Breaker

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：

Main Mechanical parameters of Circuit Breaker: