bridge rectifier

[vitalstates]

the following is from the data sheet for the rectifier I am trying to use. Can anybody tell me which is 'in + and -' and which is 'out + and -'. I'm sure its obvious to one and all, but I'm struggling here.

Regards

Ed

[vitalstates]

sorry......here is the pic

[Andrew]

Looks to me like the connection labelled AC1 and AC2 are the inputs.

Then + will be your HT etc.

This is quite important so I would seek a second opinion.

cheers,

-- Andrew

[prince of darkness]

I may be misunderstanding the data sheet drawing, but it appears to me that it shows -ve as top left, +ve bottom right for the output. As the input is A.C., AC1 and AC2 can be connected to the input either way round.
If I've got this wrong, I'm sure someone will point this out soon.

[cjnuk]

I would second that but a quick check on the diodes with a multimeter to confirm that they follow the expected polarity would help to put your mind at rest.

[A Stuart]

I agree with the above. The diagram shows small ~ symbols in the very corners at the AC inputs, and a small + bottom Right, and - top Left, indicating the DC outputs. This would appear to be the view from below the device.

No current should flow either direction between the AC terminals. Electrons should flow into the + terminal to all others,: electrons should come out of the - terminal from all others.
(Look at the instructions on your meter to be certain which lead is which if using resistance setting on your multimeter.)

Alastair

[vitalstates]

Thanks chaps....

it wasn't my imagination then......I would have thought that the data sheet would be/ should be straightforward. Its a standard 200v 35a job from RS part number 395-4332.

If anybody else has the definitive answer I'm all ears...

Regards

Ed

[Richard]

Hi Ed

Usually the + DC is marked on a bridge by a long wire, cut package corner or directly with a +. Maybe you haven't recd the part yet and it will be clear when you get it.

I'd expect the terminal that is the other way round to the rest in your drawing to be the + DC, similar to this pic which has all 3 methods used to mark +,



Ah, just seen your post with the RS number and the pic of it on the site has a cut corner by that terminal.

[vitalstates]

Hi Alastair

now that you point it out it makes perfect sense, although I have to say it doesnt appear obvious to me...many thanks

Hi Richard

the boss is away in France at the mo with the camera but I just did this with the scanner......I don't seem to have the benefit of your labelling..

rect1.jpg

Regards

Ed

[cjnuk]

Another way of doing it would be to connect a 9v battery (not an alkaline or rechargeable one) to the AC terminals both ways round, with your meter connected to what you think are the DC out terminals and look for DC of the correct polarity.

If you just briefly touch the battery onto the terminals at first and look for any sparks you can whip it straight off. The low voltage of the battery shouldn't get you into any trouble!