FN7-12DR model AC HV indoor load break switch applies to thre e-phase power supply system of rated voltage 12kV and AC 50/60Hz. It used to switch on and off load-breaking 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 grade;
5. Applicable occasions should free from inflammables, explosives, corrosives and severe vibration.