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IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 04, Issue 05 (May. 2014), ||V2|| PP 26-31 International organization of Scientific Research 26 | P a g e Overcurrent Relay Setting Model for Effective Substation Relay Coordination Uma , Akanu Ibiam Federal Polytechnic Unwana Micheal Okpara University Umudike Abstract: - Relay protection Setting of substation plays a very vital role for power system safe operation. But in the recent years power demand has increase substantially while the expansion of the system has been severely limited due to abnormalities of Isolation of faulty areas by the protection system as a result of lack of Effective coordination of the Relay operation. The main objective of this paper is to design a computer based Model using different characteristics equation of Overcurrent Relay (Standard Inverse, Very Inverse and Extremely Inverse) for determination of different Relay parameters.
Overcurrent Relay Setting Model for Effective Substation Relay Coordination International organization of Scientific Research 27 | P a g e associated with temperature rise of the equipment whose permissible limit is based on insulation class and
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