Can some one help me undertanding this question and how to solve it:
4. An instantaneous trip test was performed on a set of circuit breakers with adjustable thermal-magnetic trip units during a maintenance outage. The time-current curve specifies an expected trip current of 4000A, which of the following results is unacceptable per NETA standards?
Your Answer: A-4240, B-5392, C-5224
Correct Answer: A-3264, B-2775, C-2953
Help: NETA MTS-2019 Table 100.8