@thesis{thesis,
		author={Afrioko  Ronny and Damiri  Dhami Johar},
		title ={ANALISIS DESAIN PENEMPATAN LIGHTNING ARRESTER 
PADA TRANSFORMATOR 3 PHASA DI FEEDER JEPARA 02 
WILAYAH KERJA PT PLN (PERSERO) ULP JEPARA},
		year={2023},
		url={http://156.67.221.169/5749/},
		abstract={One of the most important components in the 20 kV distribution system is the distribution 
substation. The function of the distribution substation is to distribute the network to PLN 
consumers, with one of the most important components being the 3 phase transformer. In its 
installation, a 3-phase transformer is placed in an open area, so that it often experiences 
interference due to lightning strikes. During semester 1 of 2022 the Jepara 02 feeder 
experienced a 3-phase transformer disturbance 5 times as a result of lightning impulses. This 
study discusses how lightning arresters work in protecting equipment with construction before 
and after the arrester changes position, the ideal protection distance for lightning arresters and 
transformers, the performance of lightning arresters after changing positions in new 
construction, and the impact of differences in construction in installing lightning arresters in 
PLN ULP Jepara. This study used field observation methods and then studied and collected 
data by searching for literature in the form of references to relevant books and journals on the 
internet. From the results of data analysis and calculations then simulated with ETAP so that 
the maximum protection distance of the lightning arrester and the transformer is 0.6 meters. 
The distance between lightning arresters and transformers with the old construction in the field 
is 3.75 meters. After using the new construction according to SPLN D5.006. In 2013, the 
distance between lightning arresters and transformers in Jepara 02 became 0.6 meters. This 
distance makes the peak lightning current that can be received from the lightning arrester 
higher, namely 1467.27 kA, and there is an increase in the performance of the lightning arrester 
by 205.19% after changing the position of the lightning arrester.}
		}