Analysis of Delay Timing and Pick-Up Current Determination on Overcurrent Relay Based on MATLAB Simulation

Authors

  • Jerry Sihite Universitas Pembangunan Panca Budi
  • Siti Anisah Universitas Pembangunan Panca Budi
  • Pristisal Wibowo Universitas Pembangunan Panca Budi

Keywords:

Overcurrent Relay, Pick-Up Current, Time Delay, MATLAB, Protection Coordination, Feeder SN.03

Abstract

Overcurrent relay (OCR) is one of the important protection systems in the electricity distribution network, which functions to detect excess current and cut off the electricity flow to prevent equipment damage and reduce the area of disturbance. Determining the parameters of pick-up current and delay time is very crucial so that the protection coordination between the circuit breaker and the recloser can work selectively. In this study, an analysis of determining the OCR setting on the SN.03 ULP Medan Denai Feeder was carried out using MATLAB simulation. The data used includes the peak load of the feeder of 215 A at night, as well as the initial settings of the Micom P142 and Schneider relays with CT ratios of 800/5 and 1000/1, respectively. Simulations were carried out to re-evaluate the pick-up current and delay time settings based on the characteristics of the load and optimal protection coordination. The simulation results show that resetting the pick-up current and delay time provides more responsive and selective protection performance in dealing with overcurrent disturbances.

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Published

2025-10-27

Issue

2025: Proceedings of International Conference on Islamic Community Studies

Section

Articles

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Copyright (c) 2025 Jerry Sihite, Siti Anisah; Pristisal Wibowo

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