1. FN7 Type 10kv 11kv 12kv indoor air load break switch fuse unit pole mounted lbs
FN7-12 series indoor AC HV load switch is a gas-production HV load switch and fuse combination unit with arc quenching principle.It is applied in three-phase AC 50Hz power system with rated voltage 12kV for breaking the load current and making the short-circuit current.The fuse combination unit can break the short-circuit current and has the function of single-phase fuse three-phase tripping and breaking.It is the ideal selection for protecting the line, equipment and transformer. Its performance meets the requirements of national standards GB 3804-2004 High-voltage alternating-current switches for rated voltage above 3.6kV and less than 40.5kV and GB 16926-2009
2. Product parameter
| Serial No. | Item | Unit | YFN7-12 HV Load Switch |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | HZ | 50 |
| 3 | Rated current | A | 630 |
| 4 | Rated short-circuit breaking current of fuse | kA | --- |
| 5 | Rated breaking transfer current | A | --- |
| 6 | Main loop resistance | μΩ | ≤80 |
| 7 | Rated active load breaking current | A | 630 |
| 8 | Rated short-time withstand current(thermal stability current)/duration | kA/s | 20/4 |
| 9 | Rated short-time withstand current(thermal stability current)/duration of earthing switch | kA/s | 16/2 |
| 10 | Rated peak withstand current(dynamic current) | kA | 50 |
| 11 | 1 min power-frequency withstand voltage(effective value)to earth,phase-to-phase/isolating fracture | kV/kV | 42/48 |
| 12 | Full-wave lightning impluse withstand voltage(peak) to earth,phase-to-phase/isolating fracture | kV/kV | 75/85 |
| 13 | Mechanical life | Time | 2000 |
| 14 | Rated opening operation voltage | V | --- |
| 15 | Time of switch opening triggered by breaking of fuse | ms | --- |
3. Product Characteristics
small size
light weight
simple & reasonable structure
small operating force
reliable performance & convenient maintenance
4. Service Conditions
(1).Altitude≤1000m;
(2).Ambient temperature-25ºC-+ 40ºC;
(3).The daily average of relative humidity shall not be larger than 95% and the monthly average shall not be larger than 90%:
(4).The ambient air shall not be subject to the obvious pollution such as corrosive or combustible gas and steam;
(5).The site without fire hazards and explosion hazards;
(6).The site that the seismic intensity does not exceed degree 8; the gradient shall not exceed 5°
5. Technical detail
6. Factory
7. Delivery
8. FAQ
1. Send the technical data, better for all useful information; we will make a good recommendation.
If possible please attach one reference picture to avoid any misunderstanding or any links from our website for we get a better understanding.
2. The lead time depend on quantity of order. Some standard type is on stock. Otherwise, it will take 3-15 days.
3. Usually shipped by sea, small order or urgent order we can send you by air.
4. All our activities are accredited to ISO 14001:2015 and IEC standard.
5. Technology ensure the quality satisfy international request.
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