[HECnet] Alpha Server 1200 p/s schematics

[Hans Vlems]

Thanks Dave


Van: Dave McGuire
Verzonden: zaterdag 28 september 2013 21:23
Aan: hecnet at Update.UU.SE
Beantwoorden: hecnet at Update.UU.SE
Onderwerp: Re: [HECnet] Alpha Server 1200 p/s schematics



It's a capacitor that is rated to be placed across (hence 'X') the AC
line. They are usually applied in just that situation, and are
basically for filtration. However, their secondary purpose is as a
"sacrificial" component to protect the rest of the power supply in the
event of a large differential glitch between the two AC lines.

One must never place a "regular" (i.e., non-X-rated) capacitor in
place of one, though. Capacitors designed for such duty are usually
physically marked with an 'X'.

-Dave

On 09/28/2013 02:49 PM, Hans Vlems wrote:
> I'm just a chemist so help me: what is an X capacitor???
> 
> *Van: *Dave McGuire
> *Verzonden: *zaterdag 28 september 2013 14:56
> *Aan: *hecnet at Update.UU.SE
> *Beantwoorden: *hecnet at Update.UU.SE
> *Onderwerp: *Re: [HECnet] Alpha Server 1200 p/s schematics
> 
> 
> On 09/28/2013 08:24 AM, Rok Vidmar wrote:
>>> I' m thinking of repairing the damaged unit but need schematics for that.
>>
>> In fact, you don't. Open it up, replace the electrolytes. Near them you
>> may find a blown small element which is not needed really.
> 
> The 'X' capacitor? Actually I'd not want to run a big power supply without
> that. They're usually not difficult to find, or to replace.
> 
> -Dave
> 
> -- 
> Dave McGuire, AK4HZ
> New Kensington, PA


-- 
Dave McGuire, AK4HZ
New Kensington, PA