Which consequence results when SF6 circuit breakers fail to quench?

💡 Explanation

When SF6 breakers fail, the arc continues due to insufficient dielectric recovery; resulting in an Arc Flash: because sustained ionization heats air, intensifying conduction, elevating risk. Therefore, B is correct, rather than alternatives, which might occur under different equipment failure conditions.

• Which protection outcome results when a three-phase induction motor experiences a single-phase power loss during operation?
• Which risk increases when an engine crankshaft vibrates excessively at high RPM?
• Which effect increases when a crane's hydraulic actuator operates beyond its design frequency?
• Which risk increases when significant yielding occurs in a steel beam during construction before concrete curing?
• Which risk increases when exceeding the PIV rating in rectifier circuits using multiple diodes?
• Which malfunction typically results when PLC watchdog timers are improperly configured in automated robotic assembly lines?