Question:-
A three-phase, 33kV oil circuit breaker is rated 1200A, 2000MVA, 3s. The symmetrical breaking current is
Option (A)
1200 A
Option (B)
3600 A
Option(C)
35 kA
Option(D)
104.8 kA
Correct Option:
(C)
Question Solution:
Symmetrical breaning current = {(2000 x 106) / (53 x 33 x 103)} = 35KA
question-answer-faq-2287