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Which risk increases when a substation transformer reaches maximum magnetizing current?

A)Increased dielectric breakdown probability
B)Minimized eddy current losses
C)Enhanced voltage regulation capability
D)Reduced hysteresis loop area

💡 Explanation

Increased magnetizing current leads to core Saturation, creating excessive magnetic flux. This saturation triggers localized electric field enhancements because the **dielectric breakdown** threshold is locally exceeded, therefore resulting in a higher failure risk of insulation, rather than minimizing losses under expected load profiles.

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