Re: Electric UFH &

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

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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