On Sun, 28 Feb 2010 21:45:13 -0500, "Jon" <(E-Mail Removed)>
wrote:
> service
>
>120vac 120vac signal
> o o o
> | | |
> o o------------*
> \ main \ |
> o o |
> | | |
> | house | |
> | | |
> | | |
> | barn | (COIL)
> --- --- | generator ignition
> -/- N.C. -/- N.C.. | o
> | | | |
> o generator o | ---
> --- --- N.O.
> - |
> gnd |
> ---
> -
> chassis
>
>
>This is my design, it *will* work, I ordered the parts, it meets my needs, I
>ordered the parts and it's what I'm going to do.
>
I agree with Peter Bennett on this, it will not work, there's no way
to seperate your "signal" from your feed line, as soon as the genertor
puts out voltage (assuming, as Peter says, it doesn't get loaded down
by your neighbours) the relay will pull in again shutting your
generator off. By the way, simply energising the igniton doesn't mean
it will start, for that you need a starter contactor, a timer to run
it & a whole bunch of other stuff to handle "won't start" situations.
By the way, are youe *sure8 that fourth wire isn't there as a ground?
or a neutral?
>All I care about is protecting the generator.
a) this is clearly criminaly negligent
&
b) actually this is pretty ggod way to to fry your generator, and all
your appliances- see below.
>The coil has to be energized
>24/7 to do it, but there's no other way.
What happens when the coil burns out?
>
>* if the generator isn't feeding power to the house and barn, it means we
>forgot to turn off the main switch and we are feeding power into the grid.
>To remedy this we can turn off the main switch. The generator will still be
>ok.
With your design leaving the swith on or off is immaterial to powering
the house. thats assuming you arn't trying to power the whole
meighbourhood, see below.
>* if the power goes on it will cut the generator ignition and open the feed
>contacts. If the main switch is off anyway, this won't harm the generator.
>If the power goes on, the main switch is on and the generator is on, there
>will be a time delay for the relay to disconnect, but any problems will
>throw the breaker in the barn for the generator, and the generator will
>still be ok.
The last time I'm aware of a genset feeding a building load at the
same time as mains came in it blew every fuse in the building. Since
it was my boss who did it everyone though it was hilariously funny
except for upper managment who were understandably perturbed that a
cross country (& trans atlantic) telecommunications relay system was
down flat for 2 hours while a suitable number of new fuses were found
& installed.
>
>I'm not digging and running wires, I'm not paying the transfer box sharks,
If you can't afford one of these
http://shop.ebay.ca/?_from=R40&_trks...All-Categories
then you can't afford fuel for your genset anyhow.
>and I'm doing this effectively, simply and easily.
>It's the end of the world and we have to do with what we've got. By the
>time 10 kw reaches any lineman, it will be too diluted to do any harm.
If you beleive that than your understanding of basic eletricity is
sorely lacking. If your genset is isn't so loaded down by the
neighborhood load that it stalls out or the breaker pops (assumiong
the genset has a breaker) then it's putting out lethal voltages into
the primary lines. sure, you say you''ll turn off the main breaker to
isolate yourself from the grid but what happens if you arn't at home?
What iff you arn't at home & the power is down beacuse linemen are
working on the primaries and now your genset is backfeeding them? Are
you really so callous about endangering the lives of the linemen?
>probably won't make it above 1 volt. The current will be sunk into the
>consumer grid abyss.
>
>I'm familiar with the N.E.C. and I've used it before. However my resources
>are limited, everybody is too scared to give me any better ideas or they
>just don't know.
Scared? Nobody in this thread has come across as scared, just
knowledgable are responsible. I'm no big fan of over-regulation & the
resultant inspector burocracy but it's a sad fact that if it wern't
for people doing stupid things (yes, like you're- against *ALL* good
advice thats been given- about to) we wouldn't have most of the rules
we do have.
I've done some truly, remarkably, stupid things in my life, sometimes
against all good advice. Take it from a pro, you're heading down the
wrong road on this.
H.
Linear Mode
