ZN28-12 type indoor high voltage vacuum circuit breaker is high indoor switch equipment of three-phase AC 50Hz, rated voltage 12kV. The product conforms to the GB1984-89 standard, the product structure has two forms: the switch body and the actuator is mounted together or switch body and actuator installed separately. Integrated structure is ZN28-12 basic model; split structure is ZN28A-12 type, suitable for various kinds of fixed type switch cabinet, such as GG-1A (Z), XGNZ-10 (Z) etc.. It can be equipped with CD17 type DC electromagnetic actuator and CT17, CT19 spring type operating mechanism.
The use of environmental conditions
The environment temperature: upper limit +40℃, lower limit -15℃;
Relative humidity: daily average value is not greater than 95%, monthly average is not greater than 90%;
Earthquake intensity: less than 8 degrees;
No fire, explosion, pollution, chemical corrosion and severe vibration place.