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Directional Overcurrent Relaying (67) Concepts
59th Annual Conference for Protective Relay Engineers, 2006., 2006Directional overcurrent relaying (67) refers to relaying that can use the phase relationship of voltage and current to determine direction to a fault. There are a variety of concepts by which this task is done. This paper will review the mainstream methods by which 67 type directional decisions are made by protective relays.
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How to Select Overcurrent Relay Characteristics
IEEE Transactions on Applications and Industry, 1963One table herein lists induction overcurrent relays, available from the various manufacturers, along with equivalent time versus current characteristics. Another table gives relay types and current ranges suitable for phase and ground protection of 12 of the most commonly encountered industrial plant distribution and motor circuits.
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Automated testing for electromechanical overcurrent relays
7th International Conference on Developments in Power Systems Protection (DPSP 2001), 2001Despite the advance of numerical technology, electromechanical relays will still be around for a long time. So testing of these relays will remain an issue in the future. There are, however, some special problems when testing electromechanical relays with electronic test sets, commonly summarized under the term power demand.
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Non-conventional Overcurrent Relays Coordination
2019The Invasive Weed Optimization (IWO) algorithm has been adapted for the high dimension coordination problem. Many utilities follow the criterion of increase use of differential protection in transmission lines which has absolute selectivity with no backup function offered.
Erik Cuevas +2 more
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An overcurrent protection relay based on local measurements
2013 IEEE Industry Applications Society Annual Meeting, 2013Abouzar Rahmati, Reza Adhami
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Overcurrent Relay Using Voltage Control
2021 International Conference on Computational Performance Evaluation (ComPE), 2021Jitendra Nath Rai +2 more
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