The original post mentions that the customer supplied the control for the fans, air switch, etc. That's part of one of the theories of failure. I do not know for sure if the fan was running during operation. Their system may have not indicated no air flow.
And it is an available interlock...
The fan keeps the armature and field windings cool. It's a 600hp motor.
Edison I'm not exactly sure what you're getting at here. I install VFD's for a living, but I am not a motor guru. Let's not veer off the path of the original question. Every shutdown you mentioned are interlocks which...
When the DC drive has all its enables and interlocks its considered ready to run. Your ready light illuminates and you can start the drive.
After further investigation some drives do use a reduced field to stop condensation.
This motor has heaters and may not be able to handle a constant...
Can anyone offer me any insight on why a DC motors field would melt/burn.
The DC drive also had a catastrophic fuse failure requiring the drive to be replaced.
One theory I do have is that the customer did not have the cooling fan on while the motor was stopped. We were told the cooling fan...
