Overview
FZN25-12 load switch and combination device are used in three-phase AC 12kV, 50Hz distribution systems. They have the advantages of compact structure, small size, light weight, long service life, strong closing and breaking ability, safety and reliability. When used in conjunction with fuses, they can replace expensive circuit breakers, and their operation and maintenance are simple and convenient.
Operating Conditions
1. Altitude: ≤ 1000 meters
2. The environment temperature: upper limit +40℃, lower limit -15℃
3. Relative humidity: daily average value is not greater than 95%, monthly average is not greater than 90%;
4. There is no fire, explosion hazard, serious pollution, Places subject to chemical corrosion and severe vibration.
Model and meaning
Technical Data
| Item | Unit | Parameter |
| Technical parameters of vacuum load switch | ||
| Rated voltage | kV | 12 |
| Rated frequency | Hz | 50 |
| Rated current | A | 630 |
| The lightning impulse withstand voltage | kV | 75/85 |
| 1min power frequency withstand voltage | 42/48 | |
| 4s rated short-time withstand current | kA | 20 |
| Rated peak withstand current | 50 | |
| Rated short-circuit closing current | 50 | |
| Interrupting no load transformer capacity | kVA | 2000 |
| Rated cable charging breaking current | A | 10 |
| Mechanical life | Times | 10000 |
| Technical parameter of combinations | ||
| Rated voltage | kV | 12 |
| Rated frequency | Hz | 50 |
| Rated current | A | 200 |
| The lightning impulse withstand voltage | kV | 75/85 |
| 1min power frequency withstand voltage | 42/48 | |
| Rated short-circuit breaking current | kA | 31.5 |
| Mechanical life | Times | 10000 |
Overall and mounting dimensions(mm)
