Re: Electric UFH &

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

Phil , Ken -

sorry ... I think I've just realised that when I lost the thread, I
accidentally changed forums ... from SelfBuild to uk_ha ... hence the
confusion !!!

apologies ...

Chris



Chris Hunter wrote:

>yes, but ... the original point was to protect electric UFH &
electric
>boilers feeding thermal stores from over-voltages that might burn them
>out & expensive replacement activities ...
>
>Chris
>
>
>
>Phil Harris wrote:
>
>
>
>>Maybe I'm missing the point here but if you have kit that is in
some way
>>sensitive to incoming mains fluctuations then why not simply run it
from a
>>double conversion UPS instead of trying to disconnect yourself from
the
>>national grid? I would assume you're not talking of kit that is
particularly
>>power hungry...
>>
>>Phil
>>
>>
>>
>>
>>
>>>-----Original Message-----
>>>From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx]
>>>On Behalf Of Chris Hunter
>>>Sent: 21 January 2007 10:07
>>>To: ukha_d@xxxxxxx
>>>Subject: Re: [ukha_d] Electric UFH &
>>>
>>> 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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>>>
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