Re: [CAD_CAM_EDM_DRO] backward transformer

In a message dated 6/16/2004 5:29:04 PM Central Standard Time,
capper@... writes:
37.5 from center to either side and 72 end to end. however when I hook up a
25 amp 250 volt bridge rectifier it reads 33.5 volts center to end and 67.5
volts end to end. I thought the rectifier would increase the voltage by 1.44.
why is it going backwards?<<

Capper: Do you ALSO have a capacitor connected across the "DC-out"???
Are you CERTAIN all the "four diodes" in the BR are not shorted! Or, if you DO
have a cap. connected and just didn't mention it, do you have its POLARITY
correct? Connecting an electrolytic filter-cap "backwards" presents a DC-load
for a few moments, until the capacitor EXPLODES, spraying yellow
who-knows-what-is gunk all over your fine white desk, face, camera, and tools, and whatever
expensive book you have opened to the page in question!

If you BR is "all good" and all the connections are correct, it WILL read
about 1.4 or so times the "nominal" AC voltage. Usually more, until a load is
also attached.


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