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- Stock: In Stock
- Model: FLN36-24KV
FLN36‑24 indoor AC high‑voltage SF₆ load break switch is applied in three‑phase AC 50 Hz ring‑main or double‑radial power supply systems with rated voltage 24 kV. It is designed for making and breaking load current and overload current. It can also switch no‑load long‑distance lines, no‑load transformers and capacitor banks.
When combined with current‑limiting fuses, the assembly can substitute circuit breakers. The load break switch takes charge of making and breaking various load currents, while the current‑limiting fuse handles heavy overload current and short‑circuit current breaking.
Operating Conditions ‑ Altitude: Maximum installation altitude ≤ 1000 m ‑ Ambient temperature: Upper limit +40 °C, lower limit ‑15 °C ‑ Ambient humidity: Daily average relative humidity ≤ 95 %; monthly average relative humidity ≤ 90 % ‑ Earthquake resistance: Seismic intensity not exceeding grade 8 ‑ The surrounding air shall be free from obvious pollution of corrosive or flammable gas, water vapour. No frequent severe vibration is allowed.
| Item | Unit | Value |
|---|---|---|
| Rated voltage | kV | 24 |
| Rated frequency | Hz | 50 |
| Rated current | A | 630 |
| Rated peak withstand current | kA | 50 |
| 4s rated short time withstand current | kA | 20 |
| Rated making current | kA | 50 |
| Rated breaking current | Active load breaking current (A) | 630 |
| Breaking current loop (A) | 630 | |
| Cable charging breaking current (A) | 10 | |
| 1 min power frequency withstand voltage (phase‑to‑phase, to earth, across isolating contacts) | kV | 42/48 |
| Lightning impulse withstand voltage (phase‑to‑phase, to earth, across isolating contacts) | kV | 75/85 |
| Relative pressure of SF₆ gas (20 ℃ Gp) | MPa | ≤0.04 |
| Rated operating voltage (electric) | V | AC220, DC220 |
| Rated voltage of shunt release | V | AC220, DC220 |
| Average opening speed | m/s | 3.5±1.5 |
| Average closing speed | m/s | 3.5±1.5 |
| Three‑phase closing synchronism | ms | ≤3 |
| Main circuit resistance | μΩ | ≤120 |
| Manual maximum torque | N·m | ≤160 |
| Pole‑to‑pole centre distance | mm | 210±0.5 |
