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Switchgear Protections - Interview Questions and Answers

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96. To limit short-circuit current in a power system are used.
A. earth wires
B. isolators
C. H.R.C. fuses
D. reactors
Explanation:
97. A balanced 3-phase system consists of
A. zero sequence currents only
B. positive sequence currents only
C. negative and zero sequence currents
D. zero, negative and positive sequence currents
Explanation:
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