The FL(R)N36‑12D Indoor High‑Voltage SF₆ Load Break Switch is indoor‑type switchgear rated at 12 kV. It adopts sulfur hexafluoride (SF₆) gas as the arc‑extinguishing and insulating medium, with three operational positions: closing, opening and earthing. It features a compact footprint, convenient installation and operation, and strong adaptability to various service environments. When assembled with other electrical components, the FL(R)N36‑12D can achieve integrated control and protection functions. It serves as control‑and‑protection equipment for industrial‑mining enterprises, civil power supply systems and secondary substations. Among its variants, the load‑break‑switch‑fuse combination apparatus is well‑matched with transformer protection characteristics, making it particularly suitable for ring‑main‑unit (RMU) power supply units. Model FLN36‑12D/630‑20 Indoor High‑Voltage SF₆ Load Break Switch and Model FL(R)N36‑12D/100‑50 Combination Apparatus conform to Chinese National Standard GB 3804, *3 kV‑63 kV AC High‑Voltage Load Break Switches* (equivalent to IEC 60265‑1), and GB 16926, *AC High‑Voltage Load‑Break Switch‑Fuse Combination Apparatus* (equivalent to IEC 60420). Should you require further details, please feel free to contact us. Our technical team is ready to work out tailored solutions for you.
Altitude: Maximum installation altitude shall not exceed 1 000 m;
Ambient air temperature: Upper limit +40 °C, lower limit −15 °C;
Ambient humidity: Daily average relative humidity ≤ 95 %, monthly average relative humidity ≤ 90 %;
Seismic intensity: Up to Grade 8;
The surrounding air at the installation site shall be free from obvious contaminants, including corrosive gases, flammable gases and water vapor. No frequent severe vibration shall be present on‑site.
| Item | Unit | parameters | ||
| FLN36‑12D/T630‑20 Load Break Switch | FLN36‑12D/100‑50 Load Break Switch‑Fuse Combination Apparatus | |||
| Mechanical Endurance | Load Break Switch | OPS | 3000 | |
| Earthing Switch | OPS | 2000 | ||
| Air Insulation Distance between Live Parts and to Earth | mm | >125 | ||
| SF₆ Gas Pressure (gauge pressure at 20℃) | Mpa | 0.05 | ||
| Annual Leakage Rate | <1% | |||
| Closing & Opening Time Deviation | ms | <3 | ||
| Circuit Resistance | μΩ | <60 | ||
| Maximum Manual Operating Torque | N·m | 85 | ||
| Rated Operating Voltage | V | AC110, DC48, AC220 | ||
