EFEKTIVITAS PENGGUNAAN MULTI CHAMBER ARRESTER (MCA) PADA PENYULANG SALEWANGAN ULP MAROS

Abstract

n the care of PT PLN (Persero) ULP Maros, one of the repositories that often trips due to lightning is the Salewangan Feeder. It was recorded that in 2021 and 2022, lightning-induced disturbances occurred 12 times and 8 times, respectively, with 65% of the disturbances occurring in the Recloser Pemuda Section. Even though they already have lightning protection such as lightning arresters that channel fault currents to the ground, in reality, component damage due to lightning disturbances in the distribution system still often occurs, so PT PLN (Persero) ULP Maros installs more protection equipment in the section, namely the Multi Chamber Arrester (MCA) which uses new innovations by throwing fault currents into the air. The effectiveness of using MCA is simulated in Matlab Simulink 2016 using a metal oxide type arrester with consideration of the same characteristics in both types of protection equipment. The results of the simulation show that the effectiveness of the MCA in protecting the distribution system is influenced by 2 things, which are: the distance between the fault point and the location of the installed MCA and the impulse size of the lightning strike that strikes the network. The MCA on the Salewangan Feeder is only effective in protecting the same section as the location of the installed MCA with a percentage of the fault current discharged into the air of 88% of the MCA capability which is around 4090 A - 4439 A with a maximum lightning strike impulse of 40 kV.