76nemo
Senior Member
- Location
- Ogdensburg, NY
Gar, ELA, maybe you can help me out with this. I have no idea how these testers work. Would anyone like to take a jab at it or attempt a schematic drawing???
A simple frequency divider would work... Anything to slow the 60 cycle down to say 3 cycle. I am sure there are numerous way you could do it.
This is what I have here:
Pretty small and simple, but it works:wink:
I think it's a shame that anyone thinks 76nemo does not know what a phase rotation meter is or why it's used.
I believe he is asking how this simple and inexpensive electronic box can determine phase rotation. :smile:
interesting that you mention that, I had no idea that was the cause of the accident. Whenever possible, I try to buy inductive tools- my cheapo phase rotation meter has the clamp on cts, and I always wonder when the day will come when a meter of mine or a test cord set will cause an unwanted problem (or worse). I don't lay awake at night worrying about it, but I do think that its definitely something that should stay in the back of your mind and you should be reasonably cautios about. (I use one of these, but the clamps are big enough for 600s http://www.globaltestsupply.com/test_equipment/Hioki__3129-10_Non-Contact_Phase_Detector.cfm, and fwiw, the thing sounds like it might actually have a little motor spinning around in it)
Great link man, and now you just dipped into my wallet. Not a bad price at all. Thank you nakulak!!!
Here is a very simple crude frequency divider. If you take the source voltage and reduce it, you could use 3 of the following circuits to run 3 LED's. Then you could visually see the the three pase sequence.