summary:
FN7-12 indoor high-voltage load switch and fuse combination is a gas-generating indoor high-voltage load switch, which is applicable to three-phase AC power system with AC 50Hz and rated voltage of 12kV, and is used for breaking load current and making short-circuit current.
Normal use conditions:
◇ Ambient air temperature: upper limit:+40 ℃; Lower limit: - 10 ℃ in general areas and - 25 ℃ in high and cold areas;
◇ Altitude: the altitude is 1000m and below;
◇ Relative humidity, daily average not more than 95%, monthly average not more than 90%;
◇ The surrounding air shall not be obviously polluted by corrosive or combustible gases and water vapor;
◇ No frequent severe vibration.
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