The FN12-12 series indoor high-voltage load break switch-fuse combination apparatus are suitable for distribution systems with 12kV and below, operating at 50Hz AC. They are used for the control and protection of power equipment such as transformers, cables, overhead lines, etc. This equipment is particularly suitable for terminal substations in urban and rural networks, as well as prefabricated substations used for ring networks and double radiation power supply units, providing convenient and reliable protection compared to circuit breakers and other electrical devices.
Ambient condition
Altitude: Up to 1000m
Ambient air temperature: Upper limit +40°C, lower limit -25°C
Relative humidity: Monthly average ≤90%, daily average ≤95%
The surrounding air should not be significantly polluted by corrosive or combustible gases and water vapor.
No frequent severe vibrations
Pollution resistance level: Level II
