Phase Sequence or Phase Present

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neelam29

New Member

• May 19, 2007

• #1

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.

 

O

on1aag

New Member

• May 19, 2007

• #2

To phase or not to phase.

Hi Neelam29,

It's a phase sequence detector.

on1aag.

 

N

neelam29

New Member

• May 19, 2007

• #3

Thanks on1aag for your reply

 

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neelam29

New Member

• May 20, 2007

• #4

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?

 

Last edited: May 20, 2007

Hero999

Banned

• May 20, 2007

• #5

That makes sense to me.

 

RODALCO

Well-Known Member

• May 20, 2007

• #6

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.

 

Hero999

Banned

• May 21, 2007

• #7

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.

 

RODALCO

Well-Known Member

• May 23, 2007

• #8

https://i123.photobucket.com/albums/o298/RODALCO/DSC02877.jpg Kyoritsu Ø seq.

https://i123.photobucket.com/albums/o298/RODALCO/DSC02876.jpg Densokki Ø seq.

Attached are two links of common phase sequence meters used in our local POCO in New Zealand.