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Home/Load Break Switch/24kV Indoor Load Break Switch/FKN12-24D MV LBS 630A Air Load Break Switch With Earthing FKN12-24D MV LBS 630A Air Load Break Switch With Earthing
The FKN12-24D load break switch is a manually operated medium-voltage switchgear component, designed for reliable power distribution and system protection. It is widely applied in 12kV–24kV distribution networks and is suitable for indoor switchgear such as RMUs and KYN series metal-clad cabinets.
Electrical ProductsTechnical Parameters of FKN12-24D Load Break Switch
| No. | Item | Unit | Data |
| 1 | Rated voltage | kV | 24 |
| 2 | Rated power frequency | Hz | 50 |
| 3 | Rated current | A | 630 |
| 4 | Maximum rated current(fuse) | A | 80 |
| 5 | Rated active load open circuit current, rated closed-loop open circuit current | A | 630 |
| 6 | Rated short-time withstand current(2s) | kA | 20 |
| 7 | Rated short circuit making current, rated peak withstand current | kA | 50 |
| 8 | 1min PF withstand voltage(phase to phase, phase to earth, across open contacts) | kV | 65/79 |
| 9 | Lightning impluse withstand voltage(peak)(phase to phase, phase to earth, across open contacts) | kV | 125/145 |
| 10 | Rated cable charging breaking current | A | 16 |
| 11 | Mechanical life | time | 2000 |
| 12 | Rated breaking transfer current | A | 1050 |
| 13 | Rated short circuit breaking current(fuse) | kA | 31.5 |
Key Features
Manual operation type, with operating handle
Phase distance: 300mm
Equipped with grounding switch
Without fuse holder (optional integration available)
Mechanism installed on the right-hand side
Reliable arc extinguishing and long service life
Compact structure, easy maintenance
Operating Conditions
The FKN12-24D load break switch is designed to operate under the following environmental conditions:
1.Ambient air temperature: maximum +40℃, minimum -25℃
2.Altitude: ≤2000m
3.Relative humidity:
Daily average ≤95%
Monthly average ≤90%
4.Atmosphere: free from corrosive or flammable gases, water vapor, or significant pollution
5.Vibration: no frequent severe vibration or shock
Dimensions of FKN12-24D High Voltage Load Break Switch
Applications
The FKN12-24D load break switch is widely used in:
Medium-voltage switchgear (KYN, RMU, GIS cabinets)
Power distribution networks (industrial, commercial, utility)
Substations and transformer stations
Indoor installations requiring compact design and reliable performance
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