FZW28-12F /T630-20 user boundary outdoor load switch (short for FKK) used in outdoor column installed occasions, has manual and electric operation function. The switch is a maintenance-free load switch. Vacuum interrupter and SF6 gas is applied as insulating medium. This product conforms to standards of GB3804.1:AC high voltage load switch，and GBT 11022:Common specifications for high-voltage
switchgear and controlgear standards .
FZW28-12F/T630-20 vacuum load switch (FZW28-12 switch and FDR-01 controller) with fault detection function, protection and control functions and communication functions, installed in the 10KV overhead lines, can realize the automatic removal of single-phase grounding fault and automatic isolation of interphase short-circuit fault. Mounting in the 10KV distribution line user responsibility demarcation point, can also be applied in the connection point of some specified branch lines. It could not be used in series.
Function of load switch
Automatically Isolate the interphase short circuit fault
When the interphase short circuit fault happens in the user branch line, the boundary switch
immediately opens and insolates after the secondary reclose of the substation circuit breaker
or recloser .The trouble circuit is isolated automatically, and resume power supplying rapidly for
other users.
Fast positioning the trouble spot
After the boundary switch protection, only the responsibility users have power failure. The
boundary switch will submit the accident information automatically. The power supply company
will send person to the spot,who will find out the causes by using Palmtop or communication
module.
Automatically eliminate single-phase earthing fault
If the single-phase earthing fault happens in the user branch line, the boundary switch will
automatically open. The other users in the substation and feeder won’t be affected by the fault.
Madel Pescription
Conditions of use
1. Altitude: ≤ 2000m
2. environment temperature :-40℃ ~+70℃
3. Relative humidity: ≤ 90%（25℃）
4. The maximum daily temperature difference:25℃
5. maximum wind speed：≤ 25m/s
