Which outcome occurs when a distribution transformer fails during peak load due to winding insulation breakdown?

💡 Explanation

When transformer winding insulation fails at peak load, a short circuit occurs, causing a massive current surge that the transformer's protection system should interrupt, but often results in cascading overcurrent tripping in upstream feeders because impedance limits modern protection system timings; Therefore, feeder overcurrent results, not harmonic distortion, voltage sags or VAR increases.

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