Medium-voltage switch disconnector FLa 15/97-6400

3-poleoutdoor

The motor-actuated 3-pole outdoor switch-disconnector FLa 15/97-6400 is able to monitor the feeder with in the isolators built-in sensors for voltage and current for faults. Fault case 1:Occurs in the lower-level supply network (stub) a permanent fault current (e.g. short circuit or earth fault) and then takes the shutdown by the upstream primary protection, the GRID-INSPECTOR IKI-50 (mounted in the motor drive UM90) is excited and dropped the switching command to the switch-disconnector. Then, the FLa 15/97-6400 automatic all disconnects the faulty feeder (dead) from the healthy power supply. A short time later, a reclosing of healthy power supply to take place and the faulty feeder of a review are subjected Fault case 2:Occurs in the lower-level supply network (stub) a short-time fault current (e.g. lightning strike) available is automatically shut down (short circuit interruption) by the upstream primary protection. Since this is not a permanent fault current, the IKI-50 in the motor drive UM90, is only excited, but it was canceled and no switching command to the FLa 15/97-6400. The outdoor switch-disconnector stays ON.