Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Afrioko, Ronny
Damiri, Dhami Johar
Subject
Teknik Elektro
Datestamp
2023-06-16 07:10:36
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.