FN5-12R(L) Model indoor AC HV load break switch-fuse combination apparatus is developed and designed based on international technology and national power supply requirement, it passes all type tests and trialoperation inspections. The apparatus conforms to IEC62271-105: AC load break switch and fuse combination apparatus. (1990 edition) and GB3804: 3-63kV AC HV load break switch. Compare to international product, it keeps up with technical level with small volume and light weight. It is applicable in ring main unit and prefabricated substations as well as 12kV line and power distribution system. The product realizes three working positions: power making, power breaking and earth. It applies to power system of rated voltage 6~12kV, 50/60Hz breaking load current, overload current and short-circuit current.
1. Altitude: ≤ 1000m;
2. Ambient temperature: -25℃ ~+40℃ ;
3. Relative humidity: daily average ≤ 95％ , monthly average ≤ 90 ％ ;
4. Earthquake intensity: ≤ 8 degree;
5. Applicable occasions should free from inflammables, explosives, corrosives and severe vibration.
Outline dimension for installation