Subject:
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Re: Proof of a Hoax? (was: New 9V Digital Trains for Germany this Autumn)
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 31 Mar 2000 23:08:13 GMT
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Highlighted:
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In lugnet.trains, Huw Millington writes:
>
> Andreas Stabno <stabno@megsinet.net> wrote in message
> news:FsAv72.EDJ@lugnet.com...
> > There's something that has been bothering me with those pictures of • automated
> > points and I finally realized what it is.
> >
> > The power connectors to drive the switching motor are connected to both • parts
> > of the point. One is attached to the straight part and the other to the
> > curved piece. My electric knowledge isn't all that great, but I was under • the
> > impression that part of the point is isolated as the current is switched • from
> > one part to the other. Wouldn't this cause havoc with the motor
> connections?
>
> The outside rails are always live (while there's power being applied to the
> track) - the inner rails are switched on or off when the point changes, so
> as it is wired, I believe it is correct.
>
> Huw
Traditional model railways with DCC control have required the 'self-isolating'
points to be hard-wired so that there is power to both rails on both tracks at
all times. This is of course to allow not only movement of trains independant
of the track status but also accessories taking their power from the track
which may be situated at the end of an otherwise 'dead' siding.
Like the power connection to the point motor, there is no reason why this
should be externally wired. It's not like TLC to produce a messy set up like
this.
(Nice pictures, hoax or not.)
Jon
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