The ZN12-12(ZN68-12)series vacuum circuit breaker is an indoorhigh-voltage switching device for a rated voltage of 12kV and athree-phase AC frequency of 50Hz.lt is a product manufacturedusing technologyintroduced from Siemens, Germany. The operatingmechanism of this circuit breaker is a spring-stored energy type. ltcan be operated with AC or DC, and manual operation is alsopossible. lt is suitable for control or protection in power generationplants, substations, and other power distribution systems, especiallyfor breaking important loads and frequent operations.
Ambient condition
Altitude:≤2000m
Ambient air temperature:Upper limit +60’C,lower limit -30°C
Relative humidity: Daily average ≤95%, monthly average ≤90%
Installation location: Should be free from fire hazards, explosion risks, severe pollution, chemical corrosion, and strong vibrations.
