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Whole house "battery" wiring/power...

Discussion in 'Electrical Engineering' started by Bill, Sep 28, 2009.

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  1. Funny Little Nose Fart, it's the sound you make when you
    laugh with your mouth closed. Then there is FLNFWSp, which
    is Funny Little Nose Fart With Spray. It happens when you
    see an intellectual post from krw and you have a mouthful
    of your preferred beverage.

  2. Oh man are you ever out in left field. You can't even spell
    your insults. Besides, Republicans disgust me but Democrats
    are special, they horrify me. Perhaps I should call you Dr.
    Sung who's nickname was "Often Wrong". FLNF

  3. Did you have any RFI problems with your power supplies? Oh yea,
    don't let krw know about your pot core transformers, he/she/it
    will try to steal them and smoke them. FLNF

  4. James Sweet

    James Sweet Guest

    Are you guys done with your little pissing match yet?
  5. I hope so, it's getting boring and very predictable.
    The guy is very much like another creep who pollutes
    alt.2600 calling himself Hatter. At least the jerk
    doesn't have a two page long pretentious sig.

  6. James Sweet

    James Sweet Guest

    Add them to a blocked sender list (killfile) and call it good. Such is
    the nature of usenet. My filter list for the EE group is bigger than
    I've ever had anywhere else.
  7. I don't have many in my killfile. If the guy was posting
    page after page of junk I would killfile him and never
    see another post of his unless someone responded to his
    nonsense. It can be entertaining in a sophomoric kind of
    way until it gets boring.


  8. Don't be so sure. gmail is looking for a face lift, and getting rid of
    abusers like you is on their to-do list.

    Essentially, your days are numbered as an abuser of this group.
  9. Jules

    Jules Guest

    For sure - it just stirred some braincells, that's all. The particular
    radio I remembered was an early (ish) transistor design - I think it may
    have been a Grundig, but I can't be certain now. The 12VDC ability was
    just to allow it to be run from a car battery whilst camping - I seem to
    recall my folks having a (black&white) TV that could run from a car
    battery, too, but I don't recall if it had a manual voltage switch like
    the radio did.

    Just struck me as interesting that it was (in theory) so easy to plug in
    to AC (via the same connector) with the voltage on the wrong setting and
    presumably cook the thing!
    Well, I grew up in the UK, and it's been 240VAC as standard over there in
    just about forever (well, near enough, Google tells me 1916) - although I
    think some DC via private generation in big, isolated houses survived into
    the 1920's. The historical picture in the US is a lot more diverse, it
    seems (and more interesting because of it :)


  10. James Sweet

    James Sweet Guest

    The differences, both historical and current are fascinating from either
    perspective. I've had some extensive discussions with an EE friend over
    in Manchester and we're both learning something new all the time.

    I don't think I've ever asked if there were ever DC rural systems over
    there. These were off-grid and typically had a bank of lead-acid cells
    which were charged by gasoline or steam driven generators or windmills.
    There were 32V versions of virtually every small appliance of the day.
    Radios, fans, food mixers, etc. They made sense when farmhouses were
    often miles from the next house and more miles to the nearest town.
  11. Don Kelly

    Don Kelly Guest

    And most farmers were quite happy to tie to the grid when it became
    possible - helping to build lines as well-- lots of rural electrification
    co-operatives came into being in the late 40's. My father was involved
    (from the utility side) with the the first one in Alberta, Canada, and the
    farmers were more than welcoming. The old windcharger/battery systems worked
    reasonably well for supplying lighting and small appliances but weren't
    capable of handling the heavier loads around the farms.
  12. Mouthy, immature little fucktards like you are the dopes attempting to
    foist stupidity as 'prowess'.
    Yet another retarded insult, veiled as assistance.
    Yes, but your opinion means very little. Less than that even.
    Yes... wussified little fucking punks like you are just that.
  13. Jules

    Jules Guest

    Interesting stuff. I never knew they had any real off-grid networks; I'd
    only ever heard of local generation supplying single dwellings. Shame
    there doesn't seem to be much about all of this on the 'net.
    Take out the 'old' and that probably still stands ;)


  14. Don Kelly

    Don Kelly Guest

    Edison went to great political lengths to discourage AC, even publicly
    electrocuting animals to show how AC causes heart failure where the
    equivalent DC voltage would not.

    As you know the very nature of DC required multiple grids and an
    endless supply of local generating plants, all of which Edison wanted
    to provide.

    My relatives have a farm in central IL with a generating windmill,
    this farm only got on the grid after WW2. In the 1930's windmill
    manufacturers in the US were producing about 100,000 windmills a year
    for farms that had no access to electrical grids. It used storage
    batteries. Funny how the wind circle is now being repeated.

    These farmers weren't on any off- grid network. Some had windchargers and
    some may have had generators but many were still without electricity of any
    sort. Windmills to pump water, kerosene lamps. and wood or coal for heating.
    The co-operative effort was to get connected to the grid at a time when
    there were few, if any, farms remote from towns that did have grid
    connections. This meant building a local distribution system and the utility
    providing the tie to the grid and operation of the system.
    The first case was in a tightly connected Mennonite "colony" and later ones
    were more general groups of farmers after the success of this one. In
    general rural (and urban) population densities were (and still are) lower
    than those in IL(about 1/10 the population in 5 times the area-admittedly
    mostly concentrated in the lower half (prairie/parkland)of the province ).
  15. Don Kelly

    Don Kelly Guest

    The sensitivity of humans and other mammals, with regard to frequency
    happens to peak in the 50-60Hz range. Edison took advantage of this and
    Tesla countered with high frequency, high voltage discharges, saying, in
    effect, "this is AC, perfectly safe" Both lied (whether they knew it or
    not and the not was shown much later) with profit as a motive. Other
    hazards such as arcing at switches or poor contacts, worse with DC, were

  16. But he was wrong, and DC kills as well. Including the onset of
    ventricular fibrillation.
  17. Not within your skull.
    Yes, you are very much, a waste.
    You are retarded.
  18. Jules

    Jules Guest

    I recall the breakers at one site I was working at fed compressed air
    through the breaker upon opening, just to extinguish any arc that may have
    formed (that was a 400V DC setup) - I think that's typical on higher power
    DC stuff. The breakers were about the size of a lunchbox.


  19. daestrom

    daestrom Guest

    Hi voltage AC breakers still do use compressed air in some. The 'blast'
    is aimed between the arcing contacts to literally blow out the arc.

    Lower voltage DC (up to 350VDC) that we used on submarines just used
    blow-out coils to create a magnetic field that 'pushed' the
    arc-conducting gases up into chutes lined with alternating metal and
    insulating plates that would cool and stretch the arc.

    But I've seen enough stuff that I know I haven't seen everything :)

  20. Jules

    Jules Guest

    Interesting - not seen those before. 'ours' were WWII-vintage, and there
    was compressed air in the same room as part of the air-start system for
    the generators, so I suppose it was no big deal to route it to the
    electrical switchboard too.
    :) I'm sure there were all sorts of ways and means of extinguishing
    arcs, though - some of which may have worked better than others!

    It'd be interesting to know what larger power stations etc. did, too. Had
    some friends in NZ with a smaller plant (2,500 kVA) but I've not talked to
    them in quite a while, and I don't recall anything obviously resembling
    breakers on the site, although I assume they were there somewhere!


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