Which failure mode increases when continuously overloading transformers?

💡 Explanation

Excessive current through the transformer windings generates heat beyond design limits allowing thermal runaway, because dielectric breakdown will occur within the insulation. Therefore the insulation fails, rather than improved eddy currents, reverse diode, or capacitive effects which don't cause failure here.

• Which outcome occurs when regenerative braking overcharges an electric vehicle's power control system?
• Which outcome occurs when thermal strain exceeds valve clearance?
• Which outcome occurs when a proportional control valve in a hydraulic actuator system experiences excessive spool valve overlap?
• Which outcome occurs when a refrigerant leak causes significantly reduced mass flow in a two-stage vapor-compression system?
• Which outcome occurs when a three-phase power system experiences ground fault impedance imbalance protection?
• Which risk increases when thermal expansion mismatches between different crankshaft sections?