Analisis Kemampuan Arrester untuk Keamanan Transformator pada PT. PLN (Persero) Gardu Induk 150 kV Selayang

Abstract

The electrical energy distribution system at the Selayang 150 kV substation has problems with increasing Lightning Arrester leakage current. The increase in Lightning Arrester leakage current was discovered after measuring and calculating the percentage of leakage current using Leakage Current Measurement and measuring and calculating temperature using thermovisi. This is caused by internal and external factors. Internal factors, such as the equipment used, are not functioning properly. So it can cause failure of the equipment while external factors include human error and can also include natural disturbances such as lightning, earthquakes, floods, wind ,and others. This final assignment discusses determining the feasibility of the Lightning Arrester leakage current at the Selayang 150 KV substation by analyzing measurements and calculating leakage currents on the Lightning Arrester based on PLN secondary data using the LCM (Leakage Current Measurement) test tool and using the thermovision test tool to obtain calculation results and Lightning Arrester leakage current measurements. The results of measurements and calculations in each conducting Bay, according to the limit determined by PLN, namely 150 μA, this indicates that the condition of the Lightning Arrester is in good condition and there are 30 connections in good condition and do not exceed the predetermined temperature limit, namely 10 oC.