Model Number

ZN28(A)-12Indoor High-voltage

Detailed Product Description

Instruction,

ZN28-12 series vacuum breaker is a kind of indoor high-voltage electric equipment with rated pressure12Kv,triphase AC 50Hz. This breaker agrees with GB1984-1989 standard. Its general structure has two types ,one is installation combining switch body and operation agency together, the other is installation with switch body and operation agency separated. one-piece construction is ZN28-12 basic type, separated construction is ZN28A-12 type that applies to all kinds of fixed type switchgear ,such as  GG-1A(Z),XGN2A10(Z) and so on.

This breaker can be used with CD17CD10A AC electromagnetic operation agency and CT19 spring power storage type of operation agency.

Using conditions,

a.      ambient air temperature , upper limit +40 , lower limit -15

b.      elevation≤1000If there is any need to increase the elevation, the rated insulation level should be increased properly

c.      amplitude, earthquake intensity less than 8

d.      daily average value of relative humidity should be less than 95%, monthly average level should be less than 90%

e.      no fire ,no danger of explosion ,no rusty gas, and no violent exercise