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#23914 - 03/30/03 02:13 PM three phase power  
hisham  Offline
Junior Member
Joined: Mar 2003
Posts: 1
Can any one help me find a circuit design that will allow me to :

1) detect phase sequence in a three phase AC circuit
2) use led to indecate the phase sequence.

Thank you


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#23915 - 03/30/03 05:04 PM Re: three phase power  
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
Go to a search engine like www.yahoo.com and type in "phase rotation meter", and stand back for the huge # of hits.


Ron

#23916 - 03/30/03 08:03 PM Re: three phase power  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Here is one using incandescent lamps, including details on operating-mode impedances and phasors. You may be able to adapt it to LEDs. {Of course, LEDs are inherently DC devices and incandescent lamps don't care.} It is presumed that you are familiar with safe electrical practices in construction and use of the device. http://www.geocities.com/lemagicien_2000/elecpage/3phase/3phase.html

Keep in mind the design is very rudimentary, and unless powered from three healthy phases may give false readings.



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