A 12 MVA, 132/6.6 kV, transformer having a reactance of 0.15 pu is fed from an infinite bus. The transformer feeds two motor each 6 MVA, 6.6 kV. Each motors has a transient reactance of 0.14 pu and a subtransient reactance of 0.30 pu based on its own rating. A three phase balanced fault oCcurs at the terminals of one motor as shown in the figure below. Find the subtransient fault current and subtransient current in breaker. 132/6.6 KV CB CB Infinite Bus Fault Type your answer here:

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 3.54P: An infinite bus, which is a constant voltage source, is connected to the primary of the...
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158 min 45 secs
A 12 MVA, 132/6.6 kV, transformer having a reactance of 0.15 pu is fed from an infinite bus. The
transformer feeds two motor each 6 MVA, 6.6 kV. Each motors has a transient reactance of 0.14
pu and a subtransient reactance of 0.30 pu based on its own rating. A three phase balanced fault
OCcurs at the terminals of one motor as shown in the figure below. Find the subtransient fault
current and subtransient current in breaker.
M1
132/6.6 KV
CB
Infinite
Bus
Fault
Type your answer here
Transcribed Image Text:158 min 45 secs A 12 MVA, 132/6.6 kV, transformer having a reactance of 0.15 pu is fed from an infinite bus. The transformer feeds two motor each 6 MVA, 6.6 kV. Each motors has a transient reactance of 0.14 pu and a subtransient reactance of 0.30 pu based on its own rating. A three phase balanced fault OCcurs at the terminals of one motor as shown in the figure below. Find the subtransient fault current and subtransient current in breaker. M1 132/6.6 KV CB Infinite Bus Fault Type your answer here
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