FN7-12DR AC high-voltage load switch is a new type of indoor gas-generating high-voltage load switch. It is suitable for AC 50HZ three-phase AC power system with a rated voltage of 12KV. It is used to interrupt the load current and close the short-circuit current.
Normal use conditions:
* Ambient air temperature
Upper limit: + 40 ° C,
Lower limit: 10 ℃ in general area, -25 ℃ in high cold area.
* Altitude is 1000 and below.
* Relative humidity: daily average is not greater than 95%, monthly average is not greater than 90%;
* The surrounding air should not be obviously polluted by corrosive or flammable gases and water vapor;
* No repetitive severe vibration
） Rated voltage ( KV )
） Rated current ( A )
有效值4s ） Rated thermal stable current ( KA effective value 4s )
有效值） Rated dynamic and stable current ( KA effective value)
峰值） Rated short-circuit closing current ( KA peak)
耐压一分钟（ KV有效值） Power frequency 50HZ withstand voltage for one minute ( KV effective value)
有效值） Lightning impulse withstand voltage ( KV effective value)
Phase to phase, relative 42
Phase to phase, phase to ground 48
Isolation fracture 48
Isolation fracture 85