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Which outcome develops when single-phasing occurs in delta-connected three-phase induction motor under load?

A)Significantly increased winding current
B)Harmonic distortion in supply voltage
C)Rotor speed increasing above synchronous speed
D)Uncontrolled regenerative braking

💡 Explanation

When single-phasing happens in a delta-connected motor, the load current redistributes through the remaining two phases, because one phase is lost, causing increased current density and resistance heating. Therefore significantly increased winding current results, rather than harmonic distortion, overspeeding, or regenerative braking that involve unrelated mechanisms.

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