martim1
Member
- Location
- Hopkinton, MA
situation: turn around pm on multiple motors
problem: when taking a meg ohm test on one of my 3 phase 480v 150hp motors at 1000v the megger drops voltage down to around 230v and i'm getting a low ohm reading. i have disconnected all three feeders and the ground. checking against the enclosure and still a low ohm reading. i'm wondering if the grease from the bearings has leaked onto the windings and if this would give me the bad quality reading.
anyone run into this problem?
problem: when taking a meg ohm test on one of my 3 phase 480v 150hp motors at 1000v the megger drops voltage down to around 230v and i'm getting a low ohm reading. i have disconnected all three feeders and the ground. checking against the enclosure and still a low ohm reading. i'm wondering if the grease from the bearings has leaked onto the windings and if this would give me the bad quality reading.
anyone run into this problem?