Description
FZN25-12 Indoor high voltage vacuum load switch & FZRN25-12D fuse combination is three-phase AC 50HZ, 12KV power distribution system control and protection devices. FZRN12-12D Load Break Switch-Fuse Combination is made up of FN12-12D load switch and SDLAJ-12(XRNTD-10) H.V current limiting Fuse.
The switch is used for 12KV,50Hz for breaking and switching load current, no load transformer cable charging current and closing short-circuit current. The load switch with earth switch can switch short-circuit current. They’re widely applied in mining industries, urban buildings and other places. They have a more reliable protection, especially for ring network, dual-radiation power supply unit and box-type substation.
Environment condition
- Ambient temperature: -25℃~+40℃
- Altitude: ≤1000m
- Relative humidity: monthly average ≤90%; daily average: ≤95%
- Wind pressure: ≤700Pa (equals to wind speed 34m/s)
- Air contamination degree: IV degree
- Earthquake intensity: ≤8 degree
- No corrosive or flammable gas
Technical Data
| NO. | ITEM | FZN25-12/T630-20 | FZRN25-12D/T125-31.5 |
| 1 | Rated voltage (kV) | 12 | |
| 2 | Rated frequency (HZ) | 50 | |
| 3 | Rated current (A) | 630 | 1250 |
| 4 | Rated peak withstand current (dynamic stability) (kA) | 50 | - |
| 5 | 4s thermo stability current (kA) | 20 | - |
| 6 | The rating active the breaking current (A) | 630 | - |
| 7 | Rated closed loop breaking current (A) | 630 | - |
| 8 | Rated cable charge breaking current (A) | 10 | - |
| 9 | Rated breaking no load transformer capacity (VA) | 1600 | |
| 10 | Rated shift electric current (A) | - | 2000 |
| 11 | Fuse model | - | SDLAJ-12 SFLAJ-12 |
| 12 | Ram output energy | 2~5 (Middle grade) | |
| 13 | Rated short circuit making electric current (kA) | 50 | |
| 14 | Earthing switch rated dynamic stability current (kA) | 50 | |
| 15 | Earthing switch 2s thermal stability current (kA) | 20 | |
| 16 | Auxiliary loop rated voltage (V) | AC/DC220, 110 | |
| 17 | Mechanical life (Time) | 10000 | |
Outline & Mounting Dimensions
Rural network transformation
User engineering
Aerospace
Railway engineering
Highway engineering
Mine application
Petroleum Engineering Applications
