Re: Electric UFH &

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

  across the power input to deal with some faults, which result in
over-current, some HP instrumention used to use some sort of solid state
device that was triggered to short blow the fuse ... they used to call
it crow-barring ...

Chris



Kenneth Watt wrote:

>I read it. I went away, dealt with some stuff. I came back, read it
again. I
>had a ludicrous amount of wine and then read it again.
>
>Nope, still makes absolutely no sense at all.
>
>K.
>
>
>
>>-----Original Message-----
>>From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
>>Of Chris Hunter
>>Sent: 20 January 2007 19:41
>>To: ukha_d@xxxxxxx
>>Subject: [ukha_d] Electric UFH &
>>
>>Dammit ... 'forgotten what this thread's called ... sorry ...
>>
>>
>>Thanks, interesting ... I guess I was thinking more of something
>>simple,
>>like an electronic crow-bar, that effectively shorts the mains
& blows
>>the fuse if ever the voltage becomes excessive ... such approaches
used
>>to be used in good-quality electronic equipment, maybe they still
are
>>... maybe, too, today, a different technology would be the thing
...
>>such as that used for resettable fuses in consumer units, or RCD
>>shut-off devices ... but something that can pass 100A everyday, for
the
>>heating system & other household equipment ... plus, of course,
the UPS
>>to look-after the essentials !
>>
>>Actually, thinking about it, with all this fancy HA we're all
chasing
>>after, it ought to be possible to program it to tell when things
aren't
>>what they ought to be, and do the necessary ... even if i's just
>>keeping
>>an eye on mains voltage ...
>>
>>OK ... what we need, is for Idratek & C-Bus to include a volts
& amps
>>measuring device in their ranges ...
>>
>>'wonder if the Electrisave could be useful in this, now that Iain's
>>broken the code ?
>>
>>'sorry, 'thinking out-loud !
>>
>>Chris
>>
>>-----
>>
>>Saturday, 20 Jan'07 - 17:53:06 -0000
>>
>>from: Graham Pye   Graham@xxxxxxx
>>
>>To protect your electronic devices (eg: PC, TV, etc) then you just
need
>>a UPS, which also has the benefit of keeping them going for a bit
if
>>you
>>have a power-cut.   I got mine from Andy Whitfield
(www.upsman.co.uk)
>>who sells reconditioned UPSs on EBay, and is a very helpful guy !  
To
>>regulate the voltage for the whole house, you can get constant
voltage
>>transformers, but that would be an expensive solution for all the
>>electrics.   I used to work on things like that in a former life,
but I
>>never really understood how they worked - it was something to do
with
>>the characteristics of the core changing under the influence of
some
>>control voltage, but it was a long time ago now !
>>
>>Graham
>>
>>-----
>>
>>Saturday, 20 Jan'07 - 10:52:59 +0000
>>
>> >peaking at over 300V ...
>>
>>Interesting ... 'wonder if there's a device that could be used to
limit
>>incoming voltages (with the winds we've been having, and the story
from
>>Madrid a few days ago - 'though I know our earth's are better here,
>>thanks to the damp ... ) - 'could save having to dig up the floor
if
>>the
>>worst happens !
>>
>>Also makes me wonder about our thoughts of going for wet UFH with
>>thermal stores & electric boilers, retaining the option of gas
-- if
>>electric cables would be easy & less expensive, maybe we could
keep the
>>option of gas through use of (for example) a Whispergen (sp?).
>>
>>Chris
>>
>>
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