MGVCL Exam Paper (30-07-2021 Shift 2)
A generating station having 'n' section busbars each rated at Q kVA with ×% reactance is connected on the tie-bars systems through busbar reactances of b%. Determine the short circuit kVA if a 3-phase fault takes place on one section.

Q[(1/x) + (n-1)/(bn+x)]
Q[(1/x) - (n+1)/(bn-x)]
Q[(1/x) + (n+1)/(bn+x)]
Q[(1/x) + (n+1)/(bn-x)]

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MGVCL Exam Paper (30-07-2021 Shift 2)
____are long-term (hours-long) voltage sags caused by system overload.

Voltage surges
Brownouts
Voltage dips
Black outs

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