Re: Remote Power Supply Connection

Trevor Wilson wrote:
> 
> "flipper" <flipper@[EMAIL PROTECTED]
> wrote in message
> news:oolu249l2p19arj95g2it4fhjag238ajfl@[EMAIL PROTECTED]
> > On Sun, 18 May 2008 07:36:56 +1000, "Trevor Wilson"
> > <trevor@[EMAIL PROTECTED]
> wrote:
> >
> >>
> >>"Ian Thompson-Bell" <ruffrecords@[EMAIL PROTECTED]
> wrote in message
> >>news:g0mu6g$2vgp$1@[EMAIL PROTECTED]
> >>> Trevor Wilson wrote:
> >>>> **Asked and answered. Use AC. Do not use DC.
> >>>>
> >>>
> >>> In practice that is perhaps not such a good idea as it sounds. It
means
> >>> the rectifiers will be at the end of a fairly long piece of cable.
The
> >>> large rate of changes of current caused by rectifiers (especially
the
> >>> semiconductor type) combined with the series inductance of the cable
is
> >>> a
> >>> recipe for noise, interference and possibly stability problems.
> >>
> >>**I fail to see how. In practice rectifiers are already at the end of
very
> >>long cables and are supplied by devices with prodigious inductance. In
any
> >>case, there are measures that can be taken to reduce the problems
> >>associated
> >>with noise from diodes. There are even (easy) measures which can be
taken
> >>to
> >>reduce the inductance of those connecting cables. What I am very
concerned
> >>about is the extreme ignorance displayed about the dangers associated
with
> >>DC arcs and connectors. This, as opposed to your hypothetical, is a
very
> >>real possibility. Read this:
> >>
> >>http://www.arcadvisor.com/faq/dc_direct_current_arc.html
> >>
> >>Trevor Wilson
> >>
> >
> > The connector isn't a switch, relay, or fuse.
> 
> **Indeed. If it is unplugged, whilst 'hot' a disaster could result.
Using AC
> eliminates any possibility of such a disaster. Using DC is just dumb.

The trouble with Trevor Wilson apart from his terrible ignorance about 
technical issues is that he gets a mental block and becomes stubborn as
a mule.

He's never designed or built anything or sold what he's designed 
and built to anyone.

The disasters don't need to happen if you know what your'e doing,
even when someone pulls out a plug with remanent Vdc on the pins
from a turned on PSU.



Patrick Turner.


> 
> Trevor Wilson