Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Hidayat, Wildan
Suyanto, Hery
Subject
Teknik Elektro
Datestamp
2023-06-19 07:11:10
Abstract :
Lightning Arrester is a channel guard against lightning strikes so that the Lightning
Arrester isolation and grounding must be in good condition in order to protect the
generation equipment. The PLTM Lambur transformer is a vital piece of equipment
where safety must be maintained. On this basis, lightning arresters must comply with
standards by testing insulation resistance and earthing resistance. In the insulation
resistance test at the bottom-ground points the values were 0.2 M?, 0.07 M? and 0.4
M?, at that point they did not meet the minimum value standard (> 1 M? / 1 kV) because
the mount on the lightning arrester was cracked and needed replacement. After replacing
the lightning arrester holder, the results of testing the insulation resistance at the bottom?ground point at the R phase of 76.8 M?, the S phase is 141 M?, and the T phase is 96.4
M?, it can be seen that the insulation resistance at the bottom-ground point is already in
good condition. well and above the minimum standard value. The results of the grounding
resistance test, namely the phases R 7 ?, S 7 ?, and T 6 ? based on the value of the
insulation resistance, do not meet the standard where the value is > 5 Ohm, and grounding
roads must be added so that the value meets the standard, so that after adding grounding
rods the value in phase R 1?, S1 ?, and T 1? based on the insulation resistance value
meets the standard where the value is < 5 Ohm.