Indoor High Voltage Fused Load Break Switch 12KV 50 HZ FN5-12 Series
FN5-12 series 12KV indoor high voltage load break switch with fuse
It performances meet IEC420 AC H.V. Load Switch with Fuse(1990 Edition) and GB3804 3-63kV AC H.V. Load Switch after strict test and long - time operating. Compared to the product of the kind in the foreign country, its technical parameter has reached the international level with the features of small volume and light weight. It can be used in package substation and ring network cabin. It is used widely in 12kV distribution network to protect the equipment against working without phase.
Service condition
1. The altitude does not exceed 1000m.
2. The ambient air temperature:Max.:+40 .Min.:-10 .
3. The relatire humidity of air diaily average ≤ 90%, monthly average ≤ 95% (temperature: 25 ).
4. The ambient air should not be obviously polluted by corrosivity and the flammability gas. etc.
5. The working sisuation without frequent violent.
Technical parameter
| Name | Unit | Parameter |
| Rated voltage | kV | 12 |
| Max. working voltage | kV | 12.7 |
| Rated frequency | Hz | 50 |
| Rated current | A | 400 630 |
| Rated short-time withstand current | kA/s | 12.5/4 20/2 |
| Rated peak withstand current | kA | 31.5 50 |
| Rated short-circuit switch-off current | A | 400 630 |
| Rated power load switch -off current | A | 400 630 |
| 5% rated power load switch-off current | A | 20 31.5 |
| Rated capacity switch-off current | A | 10 |
| Rated inductance switch-off current | A | 40 |
| Rated transfer current | kA | 1.3 |
| 1min power frequency withstand voltage to groundinterphase/isolation break | kV | 12/48 |
| Lighting impulse resisting voltage (peak) to groundinterphase/isolation break | kV | 75/85 |
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