Main breaker tripping, dead CIM

[Mr V]

Damage to the CIM could certainly increase its power draw either through increased drag or due to an internal short.

The breaker is rated to trip in 20 sec with an aprox 200% over current situation. The breaker is thermal so short bursts of much higher current will cause the temp to rise and it to trip eventually. If enough heat is building up in the breaker to cause it to trip the wire will certainly be heating up as well. Extended use at near trip conditions will eventually cause fatigue of the internal materials and eventually lead to an early trip situation.

At peak power, ~2600 rpm a CIM draws 68 amps and as it speed decreases that current increases to 133 amps at stall assuming a full constant 12v is applied.