Answered: Ex.1: Determine the PSM (plug setting…

Ex.1: Determine the PSM (plug setting multiplier) of a 5A, 2.2 sec over current relay having a plug setting Ps=200%. The supply CT is rated 400:5A and the fault current is 12000A.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter10: System Protection

Section: Chapter Questions

Problem 10.29P

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Ex. 1: Determine the PSM (plug setting multiplier) of a 5A, 2.2
sec over current relay having a plug setting Ps=200%. The
supply CT is rated 400:5A and the fault current is 12000A.

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