Evaluation of Grounding System Values with Grid Type on 150 Kv in Batu Besar Substation, Batam

Abstract

Generally, electrical fault occurs in substations, such as phase-to-ground short circuit. The fault currents flowing in Grounding System with Grid-Type can cause voltage gradient different on ground points around substation. The purpose of this study is to evaluate the Grounding System Values with Grid-Type whether meets standard, and protect somebody who is walking around substation or touching equipment stung of 150Kv electric in Batu-Besar Substation, Batam. Grounding System with Grid-Type needs to be evaluated every certain period to get Touch Voltage and Step Voltage that meet safety and security standard of IEEE Std 80-2013. The research method is to collect parameters ρ,ρs,hs,A,LT,h, which calculated using formula of Resistance Value, Touch Voltage, Step Voltage of Grounding System with Grid-Type. Then, analyzing and comparing of these data are performed based on results of calculation using the IEEE Std 80-2013. From results of this research, Resistance Value is 0.62Ω, 737.65V and 2,458.43V are Touch Voltage and Step Voltage of Grounding System Values with Grid-Type respectively, based on 0.5second interruption duration with somebody's body weight of 50kg. The Evaluation results show that Grounding System Values with Grid-Type, meet the standard of IEEE Std 80-2013 for somebody who has weight 50kg in Batu-Besar Substation, Batam.