1285. A thermal-magnetic molded case circuit breaker for a 300 kW alternator is rated at 500 amperes at full continuous load. Which of the following conditions will MOST likely trip the breaker?

A thermal-magnetic circuit breaker rated at 500 amperes will most likely trip with an instantaneous current draw of 10,000 amperes for 0.03 seconds due to the breaker's instantaneous magnetic trip element responding to extreme fault currents.