On 24/04/14 04:06, Uncle Peter wrote:
On Wed, 23 Apr 2014 13:20:40 +0100, Daniel
wrote:

On 23/04/14 07:01, Uncle Peter wrote:
On Tue, 22 Apr 2014 11:00:36 +0100, Daniel
wrote:

On 22/04/14 04:26, Uncle Peter wrote:
On Mon, 21 Apr 2014 12:22:39 +0100, Daniel
wrote:

On 21/04/14 05:03, Uncle Peter wrote:








But *I* didn't, which is why I asked "What's "PFC" when it's at
home??"

When you immediately answered yourself, with two shriek marks, I
assumed
you were telling me.

What part of the world are you from?? In some parts of the world, the
first thing people might think when they hear "PFC" would be "Private
First Class"!!

Only if they're military.



I'm guessing just one, very big, capacitor which can handle the
filtering task for all loads up to the Power Supply's rating.

But surely if it's not adjusted, then it's overcompensating when the
supply is not fully loaded.

No, in a Switched Mode Power Supply, as the load varies, it is
*Switched
On* for more of less of the Alternating Cycle. If the supply's output
(Current/Voltage) is falling below the required (Current/Voltage), the
Switching element/transistor is switched on for more of the input
cycle,
not the input voltage!!

I see. So this is seperate from the yellow one connected across the
mains input?

Yes, the "yellow one connected across the mains input" is a bridge
rectifier, which converts the AC Sinewave input into single polarity
pulses at twice the mains supply frequency.

No it isn't, I mean these ones:
http://www.o-digital.com/uploads/217...tor_X2_358.jpg

Sorry, my mistake.

10 x 850 watt power supplies, total 8.5kW, from a 240V supply takes
about 35Amps, .... and lets double that to allow for transformer and
other circuitry loses = 70Amps!! Whoopee!! from your regional Power
Company, which probably supplies THOUSANDS of Amps!!

Snip

Yes, I was just pointing out I have a ridiculous freezer.

Wacko!!

It hasn't got food in it.

So what's it doing "On", apart from wasting energy??

Keeping water cool.

How much water, and for what purpose??

Daniel