Thanks for the response guys.
To answer your questions:
Scotty - No dust or fine spray seized the drive fan bearings. We inspected for it and saw no evidence to support that idea. We also replaced the fans only from a new drive and the fans still didn't work.
We haven't tested the earth...
Hi fellas,
My company has had some problems with a spray booth we installed in a body shop awhile ago (7.5kW motors for intake/extraction fans(x2) supplied by VSDs, gas burner, PLCs, small 3-phase motor for an air compressor, a couple spot welders, pressure washer and normal shop tools, lights...