Q1. The following figure. Current transformers have A RATIO (CTRS)of 400/5 and no error. Relay time characteristics mounted on the switches is S1 to S4: S1, S2, S4 I. T=22.6 I. T=16.5 S3 A three-phase fault occurs at the F of line S1S2. a-which switches is work? b-Specify one of the switches that will be cut and at what time? c-Is local protection provided?

Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Q1. The following figure. Current transformers have A RATIO
(CTRS)of 400/5 and'no error. Relay time characteristics mounted on
the switches is S1 to S4:
s1, S2, S4 I. T=22.6
S3
I. T=16.5
A three-phase fault occurs at the F of line S1S2.
a-which switches is work?
b-Specify one of the switches that will be cut and at what time?
c-Is local protection provided?
(The lines IMPEDANCE IN ohms is shown in the figure
pu
x-16.5%
10 MVA, 11 kV
G
j2
j2
S4 D
j2
j3
Transcribed Image Text:Q1. The following figure. Current transformers have A RATIO (CTRS)of 400/5 and'no error. Relay time characteristics mounted on the switches is S1 to S4: s1, S2, S4 I. T=22.6 S3 I. T=16.5 A three-phase fault occurs at the F of line S1S2. a-which switches is work? b-Specify one of the switches that will be cut and at what time? c-Is local protection provided? (The lines IMPEDANCE IN ohms is shown in the figure pu x-16.5% 10 MVA, 11 kV G j2 j2 S4 D j2 j3
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