Secondary Switchgear, Series KYN28A-12
Series KYN28A-12 secondary switchgears are 3-phase AC, 50Hz main and branch busbars segmented power distribution devices. They are primarily used for acceptance and distribution of 3 to 10kV of electricity, as well as control, protect, and test the circuit. Vacuum circuit breakers are equipped inside, with observation windows on the exterior to allow users to observe inner component working conditions at any time. The switchgear bodies feature an IP4X protect class, and when the cart doors are open, the protection class is IP2X. These switchgears are also designed to be condensation resistant and dirt resistant, thus ensuring employee safety. These secondary switchgears are widely used for industrial and mining enterprises, power plants, and substations. We also offer switchgear customization according to customer requirements.
| Project | Unit | Data |
| Rated voltage | KV | 12 |
| 1min power frequency withstand voltage (rated insulation level) | KV | 42 (Phase-ground and phase-phase) 48 (Insulating break) |
| Lightning impulse withstand voltage (rated insulation level) | KV | 75 (Phase-ground and phase-phase) 85 (Insulating break) |
| Rated frequency | HZ | 50 |
| Rated current, main busbar | A | 630 1250 1600 2000 2500 3150 4000 |
| Rated current, branch busbar | A | 630 1250 1600 2000 2500 3150 4000 |
| 4S thermal stability current | KA | 16 20 25 31.5 40 |
| Rated dynamic stability current | KA | 40 50 63 80 100 |
| Protection class | | Shell: IP4X Trolley door open: IP2X |
- Ambient temperature: -15℃— 40℃
- Ambient humidity:
Daily average relative humidity ≤95%, daily average vapor pressure of water≤2.2kPa;
Monthly average relative humidity ≤90%, monthly average vapor pressure of water≤1.8kPa - Altitude: ≤1000m;
- Seismic intensity: ≤ magnitude 8
- Ambient air: without obvious pollution by corrosive or flammable gas and steam
- Places without regular strenuous vibration
- In use beyond normal conditions in GB3906, users should consult us.
