Which risk increases when a three-phase circuit breaker trips due to single-phasing in an induction motor load?

💡 Explanation

When a breaker trips causing single-phasing in an induction motor, the motor attempts to draw excessive current through the remaining phases and may develop a DC component, causing transformer cores to go into saturation due to the increased magnetic flux density. Therefore transformer saturation results, rather than resonance, arc flash, or cable heating each from alternate failure mechanisms.

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