Which consequence results when the voltage withstand limit of a circuit breaker in a 13.8kV distribution substation is exceeded?

💡 Explanation

Flashover occurs because exceeding the insulator's dielectric strength causes uncontrolled current flow through the insulation; therefore, insulation breaks down and flashover happens, rather than efficient arc quenching, which needs a controlled environment.

• Which outcome complicates trajectory control when a robotic arm's joint encounters a kinematic singularity?
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• Which risk significantly increases when exceeding a helicopter's retreating blade stall airspeed limit during forward flight?
• Which outcome occurs when a three-phase power transformer in a distribution system experiences single-phase isolation?
• Which problem can arise from rapid, repeated hydraulic actuator cycling powered by an accumulator?
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