ZN28-12 indoor vacuum circuit breaker 12KV（fixed）

ZN28-12 Indoor vacuum circuit breaker is a three-phase AC 50Hz high-voltage indoor switchgear. The product conforms to,. The integrated structure is the basic ZN28-12T; Split structure ZN28-12T series vacuum circuit breaker rated voltage 12kV, three-phase AC 50Hz high voltage indoor switchgear.

ZN28-12 series vacuum circuit breaker main function is used for line infrequent conversion and motor infrequent start, especially suitable for power plants, substations and other transmission and distribution system control or protection switch, especially suitable for breaking important loads and frequent operation places. ‌

The circuit breaker is suitable for three-phase AC 50Hz, rated voltage 12kV indoor high voltage environment, can effectively protect the electrical facilities and control the operation of the electrical equipment.‌

Environmental conditions:

1. Altitude: the altitude does not exceed 2000m;
2. Ambient temperature: no higher than +40℃, not lower than -25℃;
3. Relative humidity: the daily average does not exceed 95%, and the monthly average does not exceed 90%;
4. Earthquake intensity: no more than 8 degrees;
5. Locations without fire, explosion hazard, serious contamination, chemical corrosion and severe vibration.

Technical parameters