The current rating of a relay is 5A, PSM= 1.5, TMS=0.4, CT ratio = 400/5, fault current is 600A. Determine operating time of the relay. At TMS = 1, the following operating time at various PSM are given below: PSM a) 2 b) 4 c) 5 d) 8 e) 10 f) 20 Operating Time g) 10 h) 5 i) 4 j) 3 k) 2.8 I) 2.4

The current rating of a relay is 5A, PSM= 1.5, TMS=0.4, CT ratio = 400/5, fault current is 600A. Determine operating time of the relay. At TMS = 1, the following operating time at various PSM are given below: PSM a) 2 b) 4 c) 5 d) 8 e) 10 f) 20 Operating Time g) 10 h) 5 i) 4 j) 3 k) 2.8 I) 2.4

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

Chapter7: Symmetrical Faults

Section: Chapter Questions

Problem 7.1P

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DC Generator

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Question

please solve step by step subject: power system Protection

The current rating of a relay is 5A, PSM= 1.5, TMS=0.4, CT ratio = 400/5, fault current is 600A.
Determine operating time of the relay. At TMS = 1, the following operating time at various PSM
are given below:
PSM
a) 2
b) 4
c) 5
d) 8
e) 10
f) 20
Operating
Time
g) 10
h) 5
i) 4
j) 3
k) 2.8
I) 2.4

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