Re: Power Supply Help

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "William Scalione"
<wscalione@n...> wrote:

>
> > I tried searching the archives, but got this message "The archive

for

> > CAD_CAM_EDM_DRO is empty"
> >
> > I was ready to power up my system and start tuning, but alas, the
> > power supply that I got off ebay a few months ago does not work.

It

> > was a condor 24V, 1000W Power supply, but I cannot get it to turn
> > on.
> >
>
> Is this a switching power supply? If it weighs a pound or two it

probably

> is, If there is a big transformer in it, it's not. Anyway, if it

is, it may

> need a load on it before it will turn on. Also if it is a switcher,

look for

> some terminals labeled +S and -S these somtimes need to be jumpered

in order

> for it to turn on.
>
> Bill

Quick safety check here ! +s needs connecting to +ve output and -s
needs connecting to -ve output. "+s and -s need to be jumpered.."
sounds like they need connecting together - DON'T !!!!! the psu will
turn itself fully on as it 'sees' 0v on its feedback and may even
destroy itself.

+s & -s are the 'sense' connections - ie where the psu references its
output so if you are running long leads to a remote load, typically
you will have the sense connections made at the far end by lighter
gauge leads so that the correct votage is maintained at the load
despite voltage drop down the load cables.

Andrew Mawson
Bromley,
Kent,
UK