Three phase rotation meter

Someone was looking for a cheap rotation meter a while back. I just saw
this on Ebay for$20.00. 60 to 600V and 20 to 400 Hz.
Reply to
Michael A. Terrell
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If functional - sounds like someone is junking out a company - and all electricians would have one.
Useful on stuff that can't run backwards and is on 3 phase.
e.g. can making or automated machines.
Martin
Reply to
Martin Eastburn
I have a device that hooks up to a motor and determines which way to wire it correctly.
i
Reply to
Ignoramus16731
They are new, electronic rotation meters. They are cheap enough for guys converting old machines to have one in their toolbox.
Reply to
Michael A. Terrell
I had a student who was a journey man with his Dad - a Master Electrician. The student was working in a can company and they just got a new machine in. It was a 'twisted' three phase and would physically harm itself if phasing of the AC was wrong.
This was 40 years ago and I was able to find a unit for him. His Dad's company didn't have one nor knew where to find one.
Twisted - there were phasing windings - two each attached to each leg of the three phase. (Star or Wye formation.).
When drawing them one puts in the phasing of each based from the previous winding. Twisted fits.
Martin
Reply to
Martin Eastburn

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