Re: C-Bus and Wire-wound transformers - HELP

[Bruno Prior <bruno@xxxxxxx>]

This would have been easy to do around 9 months ago when we were doing
the fabric of the building. Unfortunately, at that time, the lighting
supplier's advice was that 6-metre runs and 300VA transformers should be
fine. Re-wiring now to bring extra feeds to the middle of the 6-metre
runs would be a royal pain. We've done our best to conceal the wiring to
preserve the barn as close as possible to its original state, and
there's no way we could run concealed wiring now. And trying to tuck
away any sort of wiring more than 5 metres off the floor, halfway up the
ceiling would not be easy, especially as the carpenters are now in the
middle of installing the oak floors below.

Anyway, I have now tried 3 different wire-wound transformers, including
one resin-coated, and they all have the same problem to different
degrees. As far as I can see, the solution is to use electronic
transformers, and thanks to this list, I now have several options to try
on that front. Unfortunately, the lighting supplier is moving like
treacle in following up the leads I have given them. Thanks to all for
your suggestions, anyway.

Cheers,

Bruno


Jon Payne wrote:
> Good idea - you could break (isolate) the wires in the centre and then
feed
> from each side. If the output of the electroinic transformers is
> isolated/floating (I presume they are) then you'd only need to break
one
> wire in the centre.
>
> jon
> ----- Original Message -----
> From: "Kevin Hawkins" <lists@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Thursday, July 31, 2003 12:18 PM
> Subject: RE: [ukha_d] C-Bus and Wire-wound transformers - HELP
>
>
>
>>One other possibility is breaking the runs into shorter lengths -
dividing
>>the loads such that they stay within the economically priced /
readily
>>available switching transformers - although this may not work
cosmetically
>>for you.
>>
>>            Kevin
>>
>>
>>From: Bruno Prior [mailto:bruno@xxxxxxx]
>>Sent: 30 July 2003 20:12
>>
>>
>>In my barn conversion, I've gone for Hi-wire lighting (i.e. the
type
>>with parallel tensioned wires bridged by the individual light
fittings),
>>running parallel with the purlins, as we have no ceiling for
hanging
>>conventional lights and we wanted to make the lighting as
unobtrusive as
>>possible. Some of the runs are quite long (6 metres) and pretty
high up
>>(over 5 metres from the floor), so I wanted to get more than 4 x
50W or
>>6 x 35W bulbs per run. That pushes me to a transformer over 200VA.
The
>>next step up seems to be 300VA, which is plenty. But unfortunately,
it
>>only seems to be possible to get wire-wound transformers of this
size,
>>not electronic.
>>
>
>
>
>
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