Tekep Isolator Gardu Untuk Menanggulangi Gangguan Binatang Tupai

: Reliability is the key to minimize SAIDI and SAIFI. The remote power station generated electrical energy, and distributed to customers trought the transmision and distribution system. So many disturbance in the distribution electrical energy process. PT. PLN ULP Kuta was noted 107 animal disturbances in 2018. Ground fault disturbance interrupted the GFR and the impact is distribution systems black out. Tekep Isolator is the trade mark of cover insulator for subdistribution station protection agains animal disturbance, that are made in PT. Adi Putra. This study is quantitative research. This study was to determine the ground fault current, after the substation insulator cover installation and to minimize the ground fault relay (GFR) interuption. The findings of this study are (1) The value of one phase ground fault by to squirrels after the installation of the insulator cover, type YS-FCO-AP on the fuse cut out while dry and wet squirrel body conditions, namely: 46.14206371 micro amperes and 46.14208458 micro amperes. The value of one phase ground fault by to squirrels after the installation insulator cover type: YS-BUS-ARR-AP on the transformer bushing and arrester while squirrels are dry and wet is: 16.83937183 micro amperes and 16.83937461 micro amperes; (2) When one phase ground fault at fuse cut out, transformer bushing and arrester by squirrels did not cause the distribution black out, because the one phase ground fault current did not over than GFR setting, that is 30 amperes.