Product Description
The ZN28(A)-12 series amounts to rating voltage 12kV, three-phase AC 50Hz high voltage indoors switching gear. This product mark GB1984-89 standard. This product overall structure with switch noumenon and operating mechanism which separate and install. The integration structure is the ZN28-12 ground form, The fission type structure is ZN28A-12. Is suitable in each kind of stationary switch cabinet, like GG-1A(Z), XGN2A10(Z) and so on.

This product may use for parts CD17, the CD10A cocurrent electromagnetism operating mechanism and CT17, the CT19 spring stored energy type operating mechanism.

Use environmental condition:
Surrounding air temperature: Upper limit +40º C, lower limit -30º C
The altitude above see level doesn't surpass 1000 meters(If needs to advance the elevation, then fixed insulation level corresponding enhancement).
The earthquake intensity does not surpass 8 degrees
Relative humidity: The date mean value not bigger than 95C, The monthly mean valune not bigger than90C.

Does not have the fire, the explosion hazard, the serious contamination, chemistry corrosion and the fierce vibration place.