Which risk increases when cascading circuit breakers in an industrial power distribution system experience a fault condition beyond the instantaneous trip threshold?

💡 Explanation

Because cascading breakers are intended to trip closest to the fault, coordination failure occurs when downstream breakers cannot clear the fault before the upstream breakers trip due to the fault exceeding instantaneous trip, therefore causing a larger outage rather than a localized one.

• Which consequence results when an aircraft's wing stall strips are damaged during pre-flight?
• Which failure mode worsens because heat increases in a power transformer circuit?
• Which effect occurs in a turbocharged diesel engine when exhaust gas recirculation valve sticks open?
• Which risk increases when a subsonic aircraft's angle of attack exceeds the critical angle?
• Which consequence results when sustained high-frequency vibration excites a steel I-beam near a resonant frequency?
• Which risk increases most rapidly when a residential heat pump's refrigerant charge drops below specified levels during peak summer?