Payment & Shipping Terms:
|Rated Voltage:||Max. Up To 24kV||Rated Frequency:||50Hz|
metal clad circuit breaker,
vacuum breaker switchgear
KYN28A-12 is the switchgear apply in the single busbar power system and single busbar sectionalized power system with three-phase AC 50Hz,7.2~12kV.It can be used for receiving & distributing electric power of the transmission and distribution control.
2. Working Condition
Indoor ambient temperature:
Max. temperature: +40℃
Daily average temperature: +35℃
Min. temperature: -15℃
Indoor ambient humidity:
Daily average relative humidity: ≤95%
Monthly average relative humidity: ≤90%
Altitude for place of installation : ≤1000m
Earthquake intensity: ≤magnitude 8
Applicable in the places without fire, explosive risk, serious polluted and chemical corrosive.
(Exceeding above working condition is available as customized product)
3. Technical Data
|Rated insulated level||1min Power frequency withstand voltage (available value)||kV||42|
|Lighting impulse withstand voltage(peak value)||kV||75|
|Rated current of main busbar||A||630,1250,1600,2000,2500,3150,4000﹡|
|Rated current of branch busbar||A||630,1250,1600,2000,2500,3150,4000|
|4s Thermal stability current (available value)||kA||16,20,25,31.5,40﹡﹡|
|Rated dynamic stability current(peak value) ﹡﹡﹡||kA||40,50,63,80,100|
﹡--- -it needs to be equipped with ventilation device.
﹡﹡---- At the rate of 40kA is 3 seconds.
﹡﹡﹡---- The short-circuit capacity of instrument transformer needs to be considered separately.
---- DL/T 404-2007
Contact Person: Sabrina Yang
Tel: 86 756 8992445