Question: Would this mistake have blown a motor?
I was given a 230/460 motor that was used – but supposedly good. To test it, I temporarily wired it to my lathe VFD today. Access and visibility inside the panel was limited and I stupidly had gotten two of the motor feed wire under the same connector. So the L1 motor lead was connected to the L1 terminal, The L2 terminal was empty and L2 and L3 leads were attached to theVFD’s L3 terminal. I also ran a ground from the motor frame to the panel .
I started the VFD with the Potentiometer at zero and slowly increased. The motor bucked a few times and a small arcing occurred at the ground. I then rechecked the wiring and corrected my mistake.
Trying again I set the pot to zero, flipped the run switch and the motor would ramp up about one fourth of the way then it would trip out the VFD. I reset the VFD and got the same results on the second try. I do not remember the error code.
I am not knowledgeable on electrical and just don’t have a feel for it. Do you think my wiring mistake would have damaged the motor… or was the motor probably bad to start?
The VFD runs fine reconnected with my lathe.
The VFD is 2HP, the motor is 1.5 HP.
There is no smell on the motor as though it had burnt.
I do not have a feel for electrical and would like the opinion of someone with electrical knowledge of three phase motors.
Thanks
Jim
I was given a 230/460 motor that was used – but supposedly good. To test it, I temporarily wired it to my lathe VFD today. Access and visibility inside the panel was limited and I stupidly had gotten two of the motor feed wire under the same connector. So the L1 motor lead was connected to the L1 terminal, The L2 terminal was empty and L2 and L3 leads were attached to theVFD’s L3 terminal. I also ran a ground from the motor frame to the panel .
I started the VFD with the Potentiometer at zero and slowly increased. The motor bucked a few times and a small arcing occurred at the ground. I then rechecked the wiring and corrected my mistake.
Trying again I set the pot to zero, flipped the run switch and the motor would ramp up about one fourth of the way then it would trip out the VFD. I reset the VFD and got the same results on the second try. I do not remember the error code.
I am not knowledgeable on electrical and just don’t have a feel for it. Do you think my wiring mistake would have damaged the motor… or was the motor probably bad to start?
The VFD runs fine reconnected with my lathe.
The VFD is 2HP, the motor is 1.5 HP.
There is no smell on the motor as though it had burnt.
I do not have a feel for electrical and would like the opinion of someone with electrical knowledge of three phase motors.
Thanks
Jim