The perils of locked rotor current

[@JayM705]

The guy is a great teacher. It was a pleasure to learn from him at Cambrian. Fantastic learning experience!

[@lancefreeman2789]

I hit that like button as soon as he said “…. Condition how long until it destroys itself….”

[@baluelectric]

Good demonstration. Practical experience. Best wishes

[@30mAkills]

Very useful demo

[@itzmeehaljohn]

reaction maybe a year late but I must say I was a bit worried for a few seconds there during LRC demo because no switch or OCPD was used to energised the motor for demonstration. Good thing the motor is equipped with thermal protection and most importantly, the instructor concluded the demo safe and sound! Stay SAFE . Thanks.

[@jongarrison8826]

I came here to find out what locked rotor current is and I am not disappointed!

[@benjamingerardo7308]

Well explained, keep going ~~

[@freakinccdevilleiv380]

Excellent. I always thought magnet wire insulation was baked ceramic instead of just a polymer.

[@DaveNorthWest]

Hi, ive got a 300v 3phase motor and I'm trying to put an encoder on it. Part of calibrating the encoder is I'm suppose to lock the motor and then set the encoder to zero. How do I know what's a safe voltage and current i can connect to the phase 1 and phase 2 wires without burning the windings up but will rotate and lock the rotor to the zero position? Thanks

[@stevesanders3992]

Can the rotor" squirrel cadge "be damaged by this also? Thanks

[@tanneraerospace7301]

Very good video but it would have been better if you had put a scale on the end of the arm to measure lock torque lb ft.

[@mikeadler434]

👍👍

[@cdrive5757]

You forgot to mention that a locked rotor = 0 air movement due to the immobilized fan blades. Zero air movement then contributes to an accelerated Stator temperature rise. It nearly complies with the definition of "Thermal Runaway" but not quite. ;-)