Hello,
I am attempting to repair my first frequency drive and found it has a bad output transistor module. This particular drive has 3 IGBT modules, one for each phase. I replaced the bad module and every thing tested fine until I hooked up a motor and blew another module. Motor was brand new never used and several amps below the rated current of the drive.
Anyway, my question is wheter or not it is normal practice to change all 3 modules if one is bad.
Thanks, James
I am attempting to repair my first frequency drive and found it has a bad output transistor module. This particular drive has 3 IGBT modules, one for each phase. I replaced the bad module and every thing tested fine until I hooked up a motor and blew another module. Motor was brand new never used and several amps below the rated current of the drive.
Anyway, my question is wheter or not it is normal practice to change all 3 modules if one is bad.
Thanks, James