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I have uploaded the picture here, seperated into two folders representing both failures. https://ryaner15.imgur.com/

Good Morning All, Let me get myself together and I will upload all of my charts to where they can be viewed more clearly. To answer a few questions: -Yes, the contactor feedback is a Digital Input (Interlock) on our computer control software. In the 3rd to last chart posted, it shows that DI...

In regards to the chart above showing the time delay between the computer ESTOP/DRV_EN and the actual drive contactor, I found out that somebody modified the contactor by removing one of the 2 springs installed. Is it possible the delay was a result of the contactor NOT being able to open...

Here is the last run performed which is when the flashover inside the motor was experienced. This first picture is zoomed in to show the ESTOP detail. See next image for complete profile. Complete Profile - Zoomed out. Now what I find interesting in this final chart is the fact that...

Later that day, after changing the contactor, 3 profiles were successfully run (in a row). First: Second: Third: The next run caused the large flashover inside the motor (see next post, I have to get the data together) :D

So I have gathered logs from our Fault Log Manager as well as some information from the drive itself. Here is the 1st run where the drive contactor opened during de-acceleration:(This picture is zoomed/cropped to show detail) Same run, just zoomed out for a glance at the complete profile...

More pictures of the motor commutator:

Hi Nic, Thanks for your reply. The motor (custom) is rated for "300% torque (316% Current) Peaks @ 3 second durations, frequently repeated." The motor is connected to a right angle Flenders gearbox, which spins a large, long, centrifuge arm. We only spin in ONE direction, never reverse. As...

Another picture attached of the commutator and brush bar with flashover markings. Again, this marking was not present during the first failure yesterday, but after the second failure...

Hi Everyone, This is my first post here in regards to some motor/drive issues that we experienced yesterday. The motor is a GE #5CD695WA802C800, 1500 HP, 600/942 RPM, 630V ARMATURE, 1865 AMPS, SHUNT WOUND. -The first failure we experienced was in the GE drive cabinet, where the drive faulted...