A 3_phase, 10 MVA/11KV Y connected, alterneter is protected by merz_ price circulating current system. The star point is earthed throug at risistance of 5 ohm. If CTs have rations of 1000/5 and The Realy is set to operate when their is overload with 30%. Determine 1) Determine The Percentage of each phase of stator winding which is protected if the reactance of the stator winding is 10% Per phase 2) Determine the minimum value of earthing risistine to Protect 85% of the winding negleet of The reactance of the stator winding in this case
A 3_phase, 10 MVA/11KV Y connected, alterneter is protected by merz_ price circulating current system. The star point is earthed throug at risistance of 5 ohm. If CTs have rations of 1000/5 and The Realy is set to operate when their is overload with 30%. Determine 1) Determine The Percentage of each phase of stator winding which is protected if the reactance of the stator winding is 10% Per phase 2) Determine the minimum value of earthing risistine to Protect 85% of the winding negleet of The reactance of the stator winding in this case
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
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.30MCQ
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![A 3_phase, 10 MVA/11KV
Y connected, alterneter is protected
by merz_ price circulating current
system. The star point is earthed
throug at risistance of 5 ohm. If
CTs have rations of 1000/5 and The
Realy is set to operate when their is
overload with 30%. Determine
1) Determine The Percentage of
each phase of stator winding which
is protected if the reactance of the
stator winding is 10% Per phase
2) Determine The minimum value of
earthing risistine to Protect 85% of
the winding negleet of The reactance
of the stator winding in this case](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe9dcfd57-c2fd-4c21-ba6a-0e19ac8b0924%2Fef886953-5473-4020-bdf5-8a5a35eef1e9%2F97gfywb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A 3_phase, 10 MVA/11KV
Y connected, alterneter is protected
by merz_ price circulating current
system. The star point is earthed
throug at risistance of 5 ohm. If
CTs have rations of 1000/5 and The
Realy is set to operate when their is
overload with 30%. Determine
1) Determine The Percentage of
each phase of stator winding which
is protected if the reactance of the
stator winding is 10% Per phase
2) Determine The minimum value of
earthing risistine to Protect 85% of
the winding negleet of The reactance
of the stator winding in this case
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