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A generator station having 4 identical generators which are connected to a common bus. The Impedance of each generator is 0.2 pu. A symmetrical fault takes place at the bus bar of the generator.
The sub transient current of the fault is ______ (in pu).
  • a)
    20
  • b)
    25
  • c)
    30
  • d)
    32
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A generator station having 4 identical generators which are connected ...
Given,
Z = 0.2 pu
4 parallel identical generators are connected to a common bus and a symmetrical fault occurred at the end of the line.
ER1 = 2.0pu

As ER1 not given assuming ER1 = 1pu
Xeq =Z/4, as 4 identical generators are connected to a common bus L-L-L fault is occurring at the line end as the fault is a symmetrical fault.
So, the fault current is:
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A generator station having 4 identical generators which are connected to a common bus. The Impedance of each generator is 0.2 pu. A symmetrical fault takes place at the bus bar of the generator.The sub transient current of the fault is ______ (in pu).a)20b)25c)30d)32Correct answer is option 'A'. Can you explain this answer?
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