1. Description
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 voltage | kV | 12 |
| Rated insulated level | 1min Power frequency withstand voltage (available value) | kV | 42 |
| Lighting impulse withstand voltage(peak value) | kV | 75 |
| Rated frequency | Hz | 50 |
| 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 |
Remark:
﹡--- -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.
4. Standard
---
- IEC62271-200:2003
---- GB3906-2006
---- GB/T11022-1999
---- DL/T 404-2007
