Sometimes its not Power Quality

Evansville IN – an interference problem in a Cath Lab….

Checked the touch voltages, the leakage currents, tried some isolation / floating things – some issues discovered but nothing easily resolved. Fortunately, it turns out that 12 cables between high frequency motor drives and the applicable motors (lots of high frequency!) were installed with the braided shields floating.

I watched the OEM and the local service engineer reterminate things so that the shields got grounded. And the problem went away.

It’s less satisfying when its not the power, but its great that the issue has been resolved….