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← TechnologyWhich risk increases significantly when protective CT saturation occurs within high-voltage power transformer differential protection systems?
A)False tripping during external faults✓
B)Overheating of winding insulation
C)Decreased transformer efficiency rating
D)Increased harmonic distortion levels
💡 Explanation
CT saturation introduces inaccuracies in measured currents; the differential relay misinterprets inrush or fault current as an internal fault because of the magnetic core's *nonlinear magnetizing inductance*. False tripping is therefore highly probable, rather than accurate fault isolation or voltage imbalance.
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