Studi Analisa Koordinasi Relai GFR Incoming Busbar 20 KV dan GFR Saluran untuk Mengamankan Gangguan Satu Phasa ke tanah di Transformator 3 Gardu Induk Kapal
ABSTRACT: Disruption of the
distribution system is generally caused by a short circuit that causes
overcurrent, one single phase short circuit to ground. Single phase to ground
disturbances that occurred at the feeder should be secured by a ground fault
relays in feeders. However, due to an error of coordination, interference with
the feeder perceived also to the incoming side of the transformer so that
ground fault relays on the incoming 20 kV ordered PMT 20 kV at the transformer
side open. Working time ground fault relays in feeders Peguyangan is for 0.25
seconds. While working time ground fault relays in the incoming 20 kV is for
0.5 seconds. This indicates that differences in work time relay by 0.25 seconds
is considered selective. The event of disruption of the ground phase, GFR relay
coordination in securing the area of ??interference must be gradual. Where the
value of working time ground fault relays in the base should be longer than the
time ground fault relays working on a feeder. It aims to work ground fault
relays working order, so that errors can be avoided in the security and do not
lead to the spread of disturbed areas.
Penulis: I Gede Krisnayoga
Kusuma
Kode Jurnal: jptlisetrodd170028
