Which risk increases when substantial VAR compensation fails following transformer energization?

💡 Explanation

Resonant overvoltage during transformer energization arises due to under-compensated reactive power. The energization causes a surge interacting with the system inductance creating oscillations, and without adequate VAR compensation, parallel resonance exacerbates the initial surge, therefore overvoltage results, rather than self-correcting eddy currents.

• Which positional error arises when resolver sensors in robotic arm joints experience thermal drift?
• Which risk increases when a turbocharged engine runs at sustained high RPMs under lean fuel conditions?
• What type of corrosion occurs when chloride ions compromise the passivation layer on rebar?
• Which consequence results when sensor inaccuracy causes undetected position drift in an industrial robot?
• Which uncontrolled motion results when cylinder pressure lags command signals controlling a hydraulic actuator?
• Which outcome occurs when a three-phase induction motor operates with a single open phase winding?