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Phase Sequence or Phase Present

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neelam29

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Hi friends,

I'm trying to design a Phase SEQUENCE detector circuit (RYB). I tried searchig on this forum for the same and i found this link "https://www.electro-tech-online.com/threads/3-phase-sequence-detector.15166/#post82233" Can someone please tell me whether the circuit shown in 3phase.gif is a Phase SEQUENCE detctor or normally a ALL 3 Phases Detector.

Thanks.
 
I tried this circuit, The led glows under RYB,YBR,BRY and dosent glows under conditions RBY,YRB,BYR i think it's working right cause the conditins under which it's glowing are cyclic. Am i right?
 
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That makes sense to me.
 
Ø seq. indicator

I personally prefer the little motorised ones.

Very reliable and no confusion with the indication.

Like Kyoritsu 8031 or densokki P1-11B.

It can be very expensive if the phasesequence is reversed, after a mains upgrade, because of a malfunctioning phasesequence meter.
 
Also for saftey's sake make sure the insulation between all parts of that circuit and the user is good enough for at least 2kV for a couple of cycles.
 
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