STUDI ANALISA GANGGUAN HUBUNG SINGKAT 1 FASA KE TANAH PADA SUTT 150 KV UNTUK SETTING RELAY OCR (APLIKASI GI PIP – PAUH LIMO
causing damage any equipment without a proper protection system. This research was study 1-phase shortcircuit to ground at 10% until 100% transmission length disturbance point and calculate Over Current Relay
(OCR) protection setting base on disturbance current occurred. The calculation performed using manual and
Matlab software, case study on GI PIP – Pauh Limo, a 22.7 km transmission length. Base on
calculation result, it was found that if the disturbance getting closer to the source (disturbance point 10% of
transmission length), than disturbance current increased until 147.7758 A. While the disturbance gettingaway from the source (disturbance point 100%), than disturbance current decreased until 147.3853 A. As toprotect the power transmission line from 1-phase short circuit to ground, the 0,65 s OCR setting time should
be used at input and output transmission line
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