Shorted turns tester

[andrew b]

I remeber seeing a diagram published for a no/go shorted turns tester for transformers. As I remember it used a low frquency oscilator (about 50Hz) and was able to detect a shorted turns in an iron cored winding and give a clear output via a light/meter/beeper if a winding has a shorted turn.
This was from the mid-transistor era mid 70's :eek: I dont want to make one with bells and whistle ie. with a upc or pics, I just want a super simple turns tester using old fangled transistors, caps and stuff. Thanks

Andrew

[Levent Suberk]

You can find a continuity tester here:
http://www.talkingelectronics.com/html/ContinuityTester.html

[andrew b]

Thanks for the reply Levent, but that shows a continuity tester. The device I am on about puts a low frquecy AC signal through the winding and can detect a shorted turn, say in a mains transformer or a choke etc. The theory being that a good winding doesn' draw as much AC current as a winding with a shorted turn in it, the shorted turn acting as small shorted "secondary" affects the "Q" of the entire winding drastically.

[mcross]

Are you thinking of a growler? Or something different?
http://en.wikipedia.org/wiki/Growler%28electrical_device%29

[Lakc]

It sounds a bit more like a dip meter with a go/no go indication

[Chippie]

A growler will detects shorts in motors...As used in industry.... ;)

[Phil Cole]

A little bit of googling...

http://www.voltech.com/Downloads/ATAppNotes/104-029-0-5A.pdf#search=%22shorted%20turns%20tester%22

http://www.repairfaq.org/REPAIR/F_flytest.html

http://www.mainelectronics.com/pdf/k7205inst.pdf

[andrew b]

Not so much a growler as a ringer, the tool is to test alternator stators on motorcycles, usually there are six windings on the stator, 3 parallel set of 2 series windings. sometimes a winding will go short to the stator frame, but most times they develop a shorted turn and I wanted to make a tool to find which winding(s) had gone bad so I could definatley blame the winding before I tore it apart or scrapped it..

Heres a Photobucket image of the stator http://i61.photobucket.com/albums/h51/andrewinpopayan/25_2.jpg