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Which 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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