Which outcome occurs when excessive current creates pathways in transformer insulation?

💡 Explanation

Dielectric breakdown and arcing happens in transformer oil because excessive current leads to partial discharge via the treeing mechanism. Electrical treeing decreases insulation resistance therefore causing arcing, rather than only increasing hysteresis or diminishing magnetostriction effects.

• Which outcome occurs when a marine propeller experiences extensive cavitation near the blade tips?
• Within precision CNC turning of steel components, which increased risk occurs when reducing dimensional tolerances below the machine's inherent capability?
• Which risk increases when a hydraulic actuator controlling a large marine rudder experiences rapid, repeated adjustments?
• Which consequence results when rapid turbine shaft deceleration occurs?
• Which risk increases when a centrifugal pump operating near NPSH?
• Which risk increases when a refrigeration system uses a refrigerant blend with zeolite desiccant?