Pemodelan dan Simulasi Sistem Proteksi Jaringan Distribusi Industri Berdasarkan Standar IEC 60255-151 dan IEEE C37 Series

Abstrak

This paper is based on the analysis of the industrial power distribution protection system using a simulation approach with ETAP software. The main focus is on the performance of the Overcurrent Relay (OCR) in detecting and responding to three-phase overcurrent faults in accordance with IEC 60255-151, IEEE C37series. Simulations were carried out under scenarios of normal system operation and during faults occurring at one of the buses. The results show that the OCR closest to the fault point operates first, while other relays function as backups, following the principles of selectivity and Time grading. The Time-Current Coordination Curve (TCC) indicates that the protection system operates quite selectively, although some relays experience subsequent activations due to thermal effects and residual currents. These findings emphasize the importance of adjusting OCR parameters to optimize the performance of the protection system.