Product Overview
The FN7-12RL/630A indoor high-voltage load switch, with rated voltage 12 kV and rated current 630 A, is suitable for three-phase AC power systems of 50 Hz, 12 kV, for breaking load current and making short-circuit current. This load switch is widely applied in industrial and mining enterprises as well as urban and rural distribution networks.
Product features: This product is the integrated version of the FN7-12R switch-fuse combination apparatus (the 'L' in the model indicates integrated construction with interlocking). The load switch and fuse are arranged as an integrated unit with reliable mechanical interlocking, meeting the five-prevention requirements, and is suitable for circuits in 12 kV indoor distribution networks requiring combined protection and operating safety. The FN7-12RL/630A load switch has a rated current of 630 A, a 4 s rated short-time withstand current of 20 kA and a rated peak withstand current of 50 kA. The FN7-12RL/630A is the integrated version of the FN7-12R switch-fuse combination apparatus, with an interlock between the load switch and the earthing switch.
Product Images
Type Designation
Type code format: F N 7 12 D - X L / R A - F 630
| F | Load switch |
| N | Indoor |
| 7 | Design serial no. |
| 12 | Rated voltage (kV) |
| D | Earthing switch |
| X | Earthing switch position (incoming end: S; outgoing end: X) |
| L | Interlocking device (with: L; without: blank) |
| R | With fuse |
| A | Striker fuse (with: A; without: blank) |
| F | Electric opening device (with: F; without: blank) |
| 630 | Rated current (400, 630A) |
Normal Service Conditions
- Ambient air temperature: upper limit +40°C, lower limit -10°C for general areas and -25°C for severe cold areas;
- Altitude not exceeding 1000m;
- Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
- The surrounding air shall not be significantly polluted by corrosive or flammable gases and water vapor;
- No frequent severe vibration.
Main Technical Parameters
| Item | Parameter (400A) | Parameter (630A) |
|---|---|---|
| Rated voltage (kV) | 12 | 12 |
| Rated insulation level, 1 min power-frequency withstand at 50 Hz (kV) | 42 phase-to-phase/phase-to-ground; 48 across isolating gap | 42 phase-to-phase/phase-to-ground; 48 across isolating gap |
| 1.2/5 μs impulse withstand voltage (kV) | 75 phase-to-phase/phase-to-ground; 85 across isolating gap | 75 phase-to-phase/phase-to-ground; 85 across isolating gap |
| Rated current (A) | 400 | 630 |
| Rated short-time withstand current (kA, 4 s) | 12.5 | 20 |
| Making capacity of load switch and earthing switch (kA, peak) | 31.5 | 50 |
| Rated peak withstand current (kA) | 31.5 | 50 |
Outline and Mounting Dimensions
Related Products
- FN5-12R/630A indoor high-voltage load switch
- FN5-12/630A indoor high-voltage load switch
- FN5-12RL/630A indoor high-voltage load switch
- FN7-12R/630 indoor high-voltage load switch
- FN7-12/630 indoor high-voltage load switch
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