@thesis{thesis, author={Basri Hasan and LODARMASE PHILIPUS AMRY}, title ={EVALUASI PROTEKSI JARINGAN TEGANGAN MENENGAH 20 KV DI KOTA AMBON}, year={2015}, url={http://156.67.221.169/1268/}, abstract={Power system reliability of generation and distribution of highly diperlukanbaik by customers or suppliers of electric power in this case PLN. Disturbance is often experienced by the network installed in the open. This disorder is caused by lightning, animals, and trees are exposed to the electric power network, and may interfere with one phase - land, two phase and three phase, as a result of electrical power is interrupted or experiencing blackouts. As the safety of the interference protection system installed from the distribution system, such as overcurrent relays to secure the phase disorder - phase or three phase. And ground fault relay to secure the land phase disorder. Overcurrent relay (OCR) and relay ground fault (GFR) mounted on the incoming feeder or feeders out, must be in the appropriate setting of fault current calculations that would occur if there is interference in the feeder out the relay on the feeders out only the trip (work)} }