FN12-12D / 630-20 indoor AC high-voltage load switch (hereinafter referred to as FN12-12D load switch) is a three-phase high-voltage switchgear with a rated voltage of 12KV and a rated frequency of 50HZ. It is used to open and close the load current and closed-loop current. No-load transformer and cable charging current, close short-circuit current. Load switch equipped with grounding switch can withstand short-circuit current.
FN12-12R.D / 100-31.5 type indoor AC high voltage load switch-fuse combination electrical appliance (hereinafter referred to as FN12-12R.D combination electrical appliance) is FN12-12D load switch disconnection and S port LAJ-12 (XRNT port- 12) Indoor high-voltage switchgear combined with high-voltage current - limiting fuses . It can reliably break any current up to the short-circuit current: the load switch breaks the working current, the fuse opens the short-circuit current, and any overcurrent between the open-circuit current and the full short-circuit current is combined. The load switch is open.
Normal working environment
* Ambient air temperature
Upper limit: + 40 ° C, lower limit: -25 ° C.
* Altitude is 1000m and below.
* Relative humidity: monthly average is not greater than 90%, daily average is not greater than 95%.
* Ambient air should not be significantly polluted by corrosive or flammable gases and water vapor.
* No frequent strenuous exercise.
* Pollution resistance level: Class II.
If the conditions of use exceed the above requirements, it shall be determined by the user and the manufacturer through consultation.
FN12-12D / 630-20
FN12-12R.D / 125-31.5
Lightning impulse withstand voltage
、隔离断85 To ground and phase 75 , isolation 85
工频耐受电压 1min power frequency withstand voltage