Which transformer failure risk greatly increases given sustained substation over-voltage?

💡 Explanation

Core saturation increases dramatically during sustained over-voltage from the power grid due to increased magnetizing current. Hysteresis in the core increases non-linearly leading to severe harmonic distortion of voltage, because the B-H curve becomes non-linear, rather than alternative insulation breakdown or loss mechanism increases.

• Which risk increases when turbocharger bearing oil supply lags during rapid acceleration?
• Which outcome is most likely as a lathe's spindle bearings experience increased temperatures due to inadequate coolant?
• Which distortion arises when a microwave transmission signal encounters atmospheric temperature gradients?
• Which outcome occurs when positional feedback from a robotic arm's optical encoder fails during a programmed task?
• Which signal consequence occurs when adaptive delta modulation exceeds its slope overload limit in mobile telecommunications?
• Which outcome occurs when the evaporator's superheat valve fails open in a refrigeration system?