In earlier blogs we talked about Voltage and FLA’s (Full Load Amps) and how this information could be used in better operating an electric motor.

This entry is about Locked Rotor Amps.

Locked Rotor Amps are the amount of power that this motor will draw when it’s starting or when it’s attempting to start but cannot.

It might not start because the bearings have seized, for example.

An electric motor is considered “locked” any time the rotor isn’t rotating. If a start is attempted but the motor cannot for a mechanical reason rotate, the motor will be in locked rotor amp.

Therefore, the LRA (locked rotor amperage) of an electric motor is the maximum amount this motor will draw when it’s attempting to start, regardless of the condition of that motor.