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← TechnologyWhich disruptive effect appears when cascading circuit breakers open in a three-phase power distribution system?
A)Harmonic resonance amplifies voltage distortion
B)Ferranti effect elevates receiving-end voltage✓
C)Skin effect increases conductor impedance
D)Proximity effect augments current crowding
💡 Explanation
When cascading breakers open, a sudden light load or open-circuit condition can initiate the Ferranti effect because line capacitance becomes dominant, causing a voltage rise at the receiving end. Therefore voltage elevation results, rather than harmonic amplification, impedance increase or current crowding, which require separate network conditions.
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