Description
Description
FN7-12DR series AC high voltage load switch is a kind of new gas-type indoor high voltage load switch, applied to AC 50Hz and rated voltage 10KV for three-phase AC power system. It is used as the breaking load current and closing short-circuit current. Following part are some parameters about environment. The max ambient air temperature is 40 ℃. The mix ambient air temperature is 10 ℃for the general area and -25 ℃ for the alpine region. The daily average relative humidity is less than 95% in area of altitude less than 2000m and the month average relative humidity is less than 90%. The ambient air should not be obviously polluted by corrosive or flammable gases and water vapor. No recurrent severe vibration.
| Rated voltage (kV) | 12 | ||
| Rated insulation level voltage | Power frequency 50Hz withstand voltage 1min (kV) | Alternate, Interstate 42 | Isolation fracture 48 |
| 1.2 /5us impulse withstand voltage (kV) | Alternate, Interphase 75 | Isolation fracture 85 | |
| Rated current (A) | 400 | 630 | |
| Rated short-time withstand current (kA, 4S) | 12.5 | 20 | |
| Rated peak withstand current (kA) | 31.5 | 50 | |
| Load switch, grounding switch, closing capacity (kA, peak value) | 31.5 | 50 | |
Installation Dimensions
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