Welcome to the ECN family Freqdrive [Linked Image] As the others have stated, we're always more than willing to share knowledge & "tricks of the trade" here..
As variable speed drives & such are a popular cause for other electrical system ailments I've come across.. (3rd wave harmonics for one..) I'm sure we'll find your input here an asset [Linked Image] As we hope to reciprocate when you need... Not to mention the vast resources in ECN's techical boards which are a great reference point for general electrical information.

Feel free to join into the evening chats in here by clicking the yellow "ECN chat" oval on the left of your screen.. Subjects from PPE, business methods & advice, to just open subject "free for all" [Linked Image]

-Randy