T.R | Title | User | Personal Name | Date | Lines |
---|
484.1 | Its not too hard if you're careful | SOFCAD::KNIGHT | Dave Knight | Tue Oct 07 1986 12:12 | 16 |
| You need a transfer switch. There are manual ones and automatic
ones. Manual ones are expensive ($275 for 100 amp switches), automatic
ones are much worse.
They are placed after your meter and before your main breaker.
They are also FOOLPROOF so you are not allowed to electrocute
your friendly power company lineman as he works on the power line.
If you homebrew one, make damn sure that it is absolutely impossible
to feed your power backwards into your normal drop. Not only will
you be trying to light up the world with your little generator;
you will indeed get the lineman who is trying to fix the problem
that caused the outage.
If you want more details, look at the NEC or give me a call or send
me mail.
|
484.2 | For less than $50... | BEING::WEISS | Forty-Two | Tue Oct 07 1986 13:59 | 12 |
| I would think that the simplest method would be to put in a 30amp 220V circuit
in your circuit box somewhere and run the wire out to the garage or wherever
you would be setting up the generator. Just put a normal wall outlet there.
Then make yourself a cord with a plug on each end, plug one end into the
generator and the other into the wall. To disconnect from the main power line,
just trip the main breaker.
The one thing that would make this not work is if circuit breakers only allow
current to flow through in one direction. Does anyone know if this is a
problem, or of any other problems with this idea?
Paul
|
484.3 | How can I test it under load? | COLORS::BOWKER | | Tue Oct 07 1986 14:24 | 10 |
| One additional item:
Is there any way I can set up a good dummy load that will test the
generator's capacity? I'd like to give it a good test load to simulate
what would happen when the surge from the well pump kicks in, without
actually killing the well pump.
Three toasters and a skill saw under load?
thanx Roger B.
|
484.4 | Them imaginary voltages will getcha | BELKER::BLESSLEY | Life's too short for boring food | Tue Oct 07 1986 14:36 | 8 |
| You have two things to deal with - the resistive load, and the inductive load.
Motorized/compressor-ized things (pumps, freezers) represent a fairly inductive
load, especially when starting up. Toasters on the other hand, make convenient,
compact loads, but are primarily resistive. Got a three horse motor with a (
physical) load to put on it?
-Scott
|
484.5 | Generator hookup and testing | LATOUR::TREMBLAY | | Wed Oct 08 1986 14:12 | 17 |
| re:.2
Circuit breakers will work in either direction. This seems
to be a common hookup method (i.e. mounting a breaker that matches
the generators output (amp-wise) in your electric distribution box
so it feeds the boxes' buss bars, therefore distributing power
throughout ther house). Ofcourse as mentioned earlier,always
shut off the main breaker so you don't feed the external power lines.
RE:.3
Why a dummy load? Why not just simulate the actual power outage.
That is, shutoff the main feed, crank up your generator, and turn
on everything you plan on running off the generator. Then you'll
know for sure if it can handle it and how certain appliance will
react to the any surging.
/Glenn
|
484.6 | Not my line, please! | RENKO::BLESSLEY | Life's too short for boring food | Thu Oct 09 1986 14:49 | 9 |
|
Do this on YOUR appliances if you like. If you generator is putting out 85
volts under load, I don't want my freezer running on it! I'd use a load that
was less sensitive to damage from low voltage use than compressors are.
-Scott
|
484.7 | Still need a dummy load.. | RAINBO::BOWKER | | Thu Oct 09 1986 15:39 | 4 |
| The question is still outstanding, what can I use for a dummy load?
Having an odd 3 horse motor around the house doesn't make it.
/roger
|
484.8 | try RED receptacles... | ARNOLD::FISHER | Al Fisher | Fri Oct 10 1986 11:36 | 17 |
| Before simply sticking a breaker into your existing panel that matches
the generators output you'd better check the NEC CODE. You would
be liable for any injuries caused by an illegal installation. The
only proper way to hook this up is to use a TRANSFER switch that
breaks one connection before it makes another. That way it's impossible
to send your own electricity down the power companies lines.
What I've done is to install several receptacles in strategic locations
and painted them RED. The RED receptacles are on their own wiring
and run to the generator in the garage. When needed the
generator is fired up and the RED receptacles become active. I need
to physically plug something into a RED receptacle to run in during
a power outage. I know it appears that I went to a lot of trouble,
but I didn't have to buy a transfer switch this way.
al
|
484.9 | Ouch! | SOFCAD::KNIGHT | Dave Knight | Fri Oct 10 1986 13:29 | 18 |
| re .2. Addendum to .1.
>I can't assume that I'll be the one firing up the system however.
Using a common breaker to connect to the generator and expecting
the main breaker to always be disconnected first is not exactly
safe unless you are exceptionally careful all the time. You'll
be doing the switchover in the dark most likely, etc. etc.
You don't even want a chance of frying the lineman who will be trying
to fix the problem. Remember that pole pigs work both ways. Several
thousand volts in gives 220 out. 220 in backwards gives several
thousand the other way. The only salvation is that you'll probably
be trying to light up the whole block if you get it wrong, and thus
hopefully kill the generator or pop your main breaker.
The reason the NEC demands a transfer switch is that it is the only
really safe way to do it.
|
484.10 | Load that dummy | FURILO::KENT | Peter | Fri Oct 10 1986 14:47 | 24 |
| Heating elements (toasters, etc.) make good dummy loads. You can
load the system to its horsepower rating without too much trouble
and not do any damage (toasters don't care about volts). As far
as inductive loads go, you can monitor the voltage and current and
try the well pump, for example. If the system is maintaining volts
with about 50% resistive load (for its horsepower rating), you should
be able to throw on the pump motor and watch the volts. You're
not going to damage the pump motor if the volts don't come up within
5 sec. Just shut the pump off if the volts sag. It's a good idea
to have a resistive load on the system to start with. It's hard
for the voltage regulator/governor system to maintain constant volts
from no load to intermittent inductive loads.
Whatever you do with switching systems, make sure it is a break
before make. I have seen breakers explode when someone tried
connecting two power sources together that were out of phase. You
never know when the power is coming back on. The expense of having
an automatic switchover system is probably beyond the means of many
homeowners. If you arrange it such that it is mechanically impossible
to connect the two systems together, you're on the right track.
I like the suggestion of having separate outlets for the E-system.
From there you can design in your power factor improvement circuit
;^)
|
484.78 | Generators | WORDS::DUKE | | Mon Aug 03 1987 14:22 | 38 |
| There was some talk of backup generators in 1309 and the need for
a transfer switch.
I didn't find what looked like an appropriate keyword to go looking
under so I am opening a new note.
If anyone is thinking of backup power for their house or whatever
a transfer switch is an absolute necessity. Simply shutting off
the main is not good enough. The generator must connected through
a transfer switch to guarentee that the line to the house cannot
be back fed from the generator. The result of back feeding the
line are obvious and fatal to the power company crews. It could
very easily end up costing you everything in court.
To save figuring which breakers to shut off and save the cost of
a huge transfer switch, a friend and I recently did the following.
Determine what circuits must have backup power. Figure the load
requirements of these circuits and buy an appropriate size generator.
Move these circuits to a new subpanel and run just that panel through
the transfer switch. A 30 Amp. transfer switch will run as much
as $100.00 so you probably don't want to even think about 100 or
200 Amp. depending upon the size of your main and try to transfer
the entire house.
There is also a neat transfer switch on the market. I believe the
brand is GENTRAN. Has individual transfers for one 240v circuit
and four (?) 120v circuits. Retails for $200.00+. I have seen
then on sale for $180ish. Semans in Manchester and Ralph Pill in
Nashua both carry it.
FYI, re: 1309 your electric meter reads watts (Kwh). You pay for
true power, the reactive power is 'free' to residential customers.
Peter Duke
MKO1-1/D28
WORDS::DUKE
|
484.79 | El Cheapo productions | VIDEO::GOODRICH | Gerry Goodrich | Mon Aug 03 1987 14:55 | 12 |
| I looked at my entrance and if I feed backup power in at
the breaker panel position near my main, a simple sheet metal
template would insure that both the main and emergency breakers
could never be on at the same time. My main is at right
angles to the individual circuit breakers. The template
would move up and down with the main and be notched such
that the emergency feeder could only be on when the main
is off and the main...
$1 worth of sheet metal might save $$$.
- gerry
|
484.80 | see note 452 | ZEN::WINSTON | Jeff Winston (Hudson, MA) | Sun Sep 13 1987 16:18 | 0 |
484.11 | generator that plugs in | MORMPS::WINSTON | Jeff Winston (Hudson, MA) | Mon Sep 14 1987 13:59 | 7 |
| I'm told there are generators that come with a plug....
You turn off your mains, and plug the generator into an outlet, and
that half of your box is energized (good idea to shut off the branches
you don't need)
Sounds too easy, is it?
|
484.12 | | AUTHOR::WELLCOME | Steve Wellcome (Maynard) | Mon Sep 14 1987 14:24 | 15 |
| re: .11
Yes and no. IF you turn off the main breaker, so you don't try
powering the entire neighborhood with your personal generator,
it will work fine. HOWEVER, doing it that way is rather frowned
upon because of the great danger that you (or somebody else)
won't turn off the main breaker first and will fry some poor lineman
up on a pole two streets over working on what he thinks is a dead
circuit.
There is a special switch you're supposed to get (a transfer switch?)
that you can wire into the line coming in from the street, so your
house either takes power from the street or from your generator,
but the two can't be connected. It's not cheap (I've heard in the
$250 range, and you'd probably need to have an electrician put it
in), but it's the approved way of doing it.
|
484.13 | oh yeah? | TOOK::CAHILL | Jim Cahill | Tue Sep 15 1987 10:47 | 7 |
| re: .11
I'd be surprised if what you say is true, only because such a
configuration would make the male end of a plug electrically
energized. Could lead to interesting results....
Jim
|
484.14 | looking for a good generator | MORMPS::WINSTON | Jeff Winston (Hudson, MA) | Mon Oct 19 1987 11:53 | 16 |
| I went generator shopping this weekend, - they all look pretty much
alike to me. For the 2-2.5KW range within which I am looking, they
range from $500 (TECUMSEH, via C.O.M.B.,) to $900 (HONDA). In-between
are SEARS, ONAN, and WINCO.
I need 2-2.5KW to support starting current for furnace fan and refrigerator.
Running current should be < 7A. I want a Large enough gas tank and/or efficient
enough engine for unattended overnight operation. And, of course, since I'm no
engine mechanic, I need hi-reliability and low maintenance.
HONDA seems to have a quality edge over the others - is this real, or
just good marketing?
Any recommendations, pro/con, or related-experiences would be most appreciated.
Thanx/j
|
484.15 | Old topic - new help ? | PFLOYD::WROTHBERG | WB1HBB | Tue Oct 20 1987 12:07 | 40 |
| I, too, could use some help in this area. All of
the previous replies seem to deal with
transfer/swithcing systems. Can somebody help me
with the basics:
1. How big a generator would I need to run the
well pump, kitchen (electric stove), and furnace.
2. Would additional capabilities (a couple of
lights and maybe the TV) add a greater load; if
so, how much.
3. Do electricians come to your home, survey
your needs and make recommendations.
4. Does the wattage rating really mean anything
when you are talking amperage ratings.
5. Gas, propane or other type of fuel.
6. How do you know when the power comes back on.
7. Warranties and repair facilities.
8. Do I need to build an outside shed to protect
the unit from snow, ice, etc.
9. Recommended brands.
As you can tell, I am completely ignorant about
what I really need and don't want to make the
fatal mistake of over or underbuying for my
needs.
(Don't really care about elec start. I can pull
the cord.)
Thanks for your experiences.
Warren
|
484.16 | | BEING::WEISS | Trade freedom for security-lose both | Tue Oct 20 1987 12:26 | 12 |
| To run a well pump, a few lights and appliances and the furnace blower you'd
probably be fine with about a 3000 watt generator, 4000 or 5000 if you didn't
want to worry about the well, the furnace, and the fridge coming on at the same
time while you were watching TV with some lights on.
I wouldn't want to try to power the electric stove, though. A resistive load
like that sucks down a LOT of power. Consider that the average hand-help hair
dryer uses over 1000 watts. A single stove burner probably uses at least 2000-
3000 watts, and just forget about the oven. You'd be better off spending $30
on a coleman stove to use on those infrequent occaisons when the power's out.
Paul
|
484.17 | not enough power? | ZEN::WINSTON | Jeff Winston (Hudson, MA) | Tue Oct 20 1987 23:15 | 7 |
| I don't have a well, and I have gas stove and furnace. I want to
power merely the 5A, 1/4HP fridge, and the 600W furnace fan. A few
lights (we have lots of flourescents) and a TV would also be nice.
Am I UNDERPOWERING with only 2KW? (2.2KW peak)?
|
484.18 | | BEING::WEISS | Trade freedom for security-lose both | Wed Oct 21 1987 09:31 | 8 |
|
>Am I UNDERPOWERING with only 2KW? (2.2KW peak)?
Probably not. The fridge and the furnace together are about 1100 watts, and
flourescent lights draw very little power. Anybody know how much power a TV
draws? It can't be more than a couple hundred watts.
Paul
|
484.19 | Starting current is the issue, not steady state. | TALLIS::KOCH | Kevin Koch LTN1-2/B17 DTN226-6274 | Wed Oct 21 1987 09:52 | 11 |
| >>Am I UNDERPOWERING with only 2KW? (2.2KW peak)?
>
>Probably not. The fridge and the furnace together are about 1100 watts, and
>flourescent lights draw very little power. Anybody know how much power a TV
>draws? It can't be more than a couple hundred watts.
The generator salesman I talked to said that the starting current
was several times the steady-state current, especially for a
refrigerator, which starts with a full load and takes longer to start.
So the real question seems to be about starting currents. Maybe
you'd get a better answer in the ELECTRO_HOBBY notesfile.
|
484.20 | the end result | ZEN::WINSTON | Jeff Winston (Hudson, MA) | Thu Nov 12 1987 00:18 | 92 |
|
My thanks to all you kind folk out there who replied (to ELECTRO_HOBBY,
HOME_WORK, and CONSUMER). This was a good example of notes files at
their best, as myself (and at least one other person I know) benefited
greatly from all the advice. (As an aside - misc.consumers yielded
almost no useful info). Anyway - this is what I did:
After confirming the actual need with a number of neighbors (annual
outages seem assured), I bought a Honda EB2200X for $800 from Fleet
Electric in Worcester. The EB2200X is the industrial-line equivalent
of the EM2200X which is sold @ most commercial Honda Dealers for
$875-$900.
Specs: 5HP Overhead Valve
144cc Displacement
AC Output: 120V 2200W max (manual says don't run @ peak for
(18.3A) more than 30 min)
120V 2000W continuous
(16.7A)
Recoil Start
2.9 gallon tank
approx 9hrs per tank under full load
dry weight: 95lbs 20" x 17" x 17"
(note, the EM2200X also has 12V output, voltmeter, voltage adjustment,
and fuel meter - none of which I though were particularly useful for
my purposes)
I chose this model because my priorities were
1) able to do the job
2) Maximal reliability
3) minimal service
4) minimal cost
5) convenience
1) I am fortunate in that my motor-starting requirements (which, take
note, really determine how much power you need, all your lights, TVs,
etc aren't in the same order of magnitude) were limited to 2 1/3HP
motors (furnace and refrigerator). With one motor running, and all
the lights, etc, on, I can't quite start the other motor (voltage
drops to 80V) - but I decided that was ok - in emergency use, I could
load balance by hand, i.e., not run the fridge continually, or turn
off some lights). Basically, once I get everything started - it
supports my running load with plenty to spare.
2,3) In ALL the feedback I got, both in notesfiles and elsewhere, NO ONE
had anything bad to say about Honda generators. This satisfied the
reliability requirement. Also - unlike some others I saw, they seem
not to be designed with the assumption that the owner is a small
engine mechanic. The Honda seems virtually foolproof - shuts off before
it can be damaged (low oil sensor, etc). BTW: when you're testing
out what it (or any generator) can do - I suggest you plug a good
Voltmeter into the generator. The Honda was happy to start my fridge
after it had about 1.2KW running load, and dropping to 80V didn't
bother the Honda, but I'm sure my fridge wasn't pleased. In fact,
working it out - the Honda seems conservatively spec'ed.
4,5) I decided not to go up to the next increment (3500W for $1100)
because, in my case, I was willing to do a little load-balancing, and
the 3500W was a 200lb 'monster' that didn't run quite as long on 50%
more gas - the long running time on the honda was a real win from my
point of view. Many industrial generators run only 1-2 hours.
Also - i think it will be a plus that the generator can be carried
around (can even store it in my basement for security). THe other
piece of convenience is that it needs minimal servicing - an oil
change every 50hrs, and a start once per month. Finally, this one is
fairly quiet, I put it behind my house, couldn't hear it in front
of the house, or in the house for that matter.
Bottom line: This model seemed like it was designed to meet my purpose
more than any other. The only trade-off I am making is the
load-balancing, which is saving me several hundred $. However, if you
have more bucks, do look seriously at the Honda 4500 and 5000W EX
models. They have electric start, and can be wired in with a transfer
switch. Then, when power goes out, you just go down stairs, throw a
switch, press a button, and you're back in business...(Ah, to be
rich). But, as for me....
!!!Bring on the storms!!!! /j
--------------------------------------
PS: Let me put in a plug for John Perry @ Fleet Electric. Although he
is a bit more of a salesman than he'd like to admit to, he was really
quite helpful in taking the time to explain things to me, and seemed
the most knowledgable of all the places I talked to (all he sells are
generators). Also - netting shipping against sales tax, he was within
$30 of the best mail order price I could get. ($810 for the EM2200X)
|
484.21 | Sounds like an option to pass up! | WELFAR::PGRANSEWICZ | Auhhhhh, I've been slimed! | Thu Nov 12 1987 10:56 | 10 |
|
RE: .20
> They have electric start, and can be wired in with a transfer
> switch.
But if you had electricity you wouldn't have to start the
generator! ;-)
|
484.22 | | MORMPS::WINSTON | Jeff Winston (Hudson, MA) | Thu Nov 12 1987 13:15 | 8 |
| >> They have electric start, and can be wired in with a transfer
>> switch.
>
>
> But if you had electricity you wouldn't have to start the
> generator! ;-)
It uses a car battery
|
484.23 | Getting clearer | WELFAR::PGRANSEWICZ | Auhhhhh, I've been slimed! | Thu Nov 12 1987 15:55 | 6 |
| Ohhhhhhhhhhhhhh.
Is that the reason to start it up every month? To keep the battery
charged? I've never even seen a generator (except in a catalog)
so sorry for the dumb questions...
|
484.24 | | MORMPS::WINSTON | Jeff Winston (Hudson, MA) | Thu Nov 12 1987 18:09 | 9 |
| > Ohhhhhhhhhhhhhh.
>
> Is that the reason to start it up every month? To keep the battery
> charged? I've never even seen a generator (except in a catalog)
> so sorry for the dumb questions...
starting ANY gasoline engine (even your car) once a month is a good
idea. - just helps maintain 'hi reliability'
|
484.25 | | Q::ROSENBAUM | Rich Rosenbaum;mail->Boehm::Rosenbaum | Sat Nov 14 1987 14:13 | 4 |
| Has anyone actually had a manual transfer switch installed for a
generator?
__Rich
|
484.26 | | GORDON::GORDON | | Mon Nov 16 1987 11:18 | 9 |
| re .25
<Has anyone actually had a manual transfer switch installed for a
generator?>
Yes, part of the current discussion on PRICE OF A 4-WAY SWITCH
speaks of such a switch. DPDT, I think.
Bill G.
|
484.27 | more on generator hookups | NSSG::FEINSMITH | | Fri Dec 11 1987 10:37 | 22 |
| Most discussions seem to center around a transfer switch between
the meter and the panel, requiring a 100 amp to 200 amp transfer
switch. This also requires panel breakers to be shut off, so that
the generator is not overloaded. A better way (although its more
difficult to install), is to move critical circuits (i.e. furnace,
refrigerator/freezer, pump, important lighting, ect.) onto a subpanel
and connect the transfer switch between the main panel and subpanel.
This way, when the transfer switch is in the generator position,
only those circuits that the generator can handle are attached to
the backup system. When power comes back on, the remaining circuits
will still be attached to the power line, so you will know when
power is restored. This method requires a lot more work, but I feel
its worth it.
Re: Outlet to connect generator:
This creates a safety hazard because the cable coming out of the
generator will be a male and it can be ***HOT***. If the generator
is to wired in, a cable should come out of the box and the male
connector attached to the generator outlet.
Eric
|
484.28 | | TALLIS::KOCH | Kevin Koch LTN1-2/B17 DTN226-6274 | Mon Dec 14 1987 10:22 | 7 |
| It is possible to never expose yourself to the hot male connector by
removing the plug fuses, connecting up the generator via an extension cord
and the male-male connector, starting the generator, and then throwing the
switch on the generator. I realize this is not the best way to do things.
A related question: If I put GFCI outlets in my basement, is it
possible to backfeed through the GFCI from the generator to the house?
|
484.29 | Money well spent | CSSE::BAIRD_2 | Eyes of Taxes are Upon You | Thu Jan 28 1988 16:54 | 13 |
|
Additional conversation on generators can be found in CONSUMER.
I put in a 10kw WINCO, LP powered, with auto transfer switch, auto
timer (for cycling), and electric start (yeh, 2 @ 6 volt car
batteries). I got a real deal on the unit (probably not to be
repeated) from Fleet Elect. in Worcester, MA. I'm in the boonies,
on a mountain and get hit at the darndest times with outages. So,
for me it was worth it. I did pick up some good info along the
way and am willing to discuss sizing, hook-ups, etc. off-line if
you're interested.
J.T.B.
|
484.30 | Another generator found | AIMHI::WAGNER | | Fri Jan 29 1988 12:36 | 44 |
| Saw this generator entry and thought I would insert my note from
the Tools note file.
<<< DELNI::WORK$01:[NOTES$LIBRARY]TOOLS.NOTE;1 >>>
-< Tools and Handy Gadgets >-
================================================================================
Note 55.15 Generators 15 of 15
AIMHI::WAGNER 24 lines 20-JAN-1988 12:45
-< I found a generator !!!! >-
--------------------------------------------------------------------------------
Well Folks, I finally found my generator. I didn't realize it was
so long ago that I first put in the note.
A 12KW single phase 220 unit with a Wisconson 4 banger (air cooled). It
LOOKED in really ratty condition but for $300 I couldn't pass it up.
I took it to the shop and cleaned it up, new muffler, ignition,
oil, battery and it looks brand new (about $120 in parts)
This thing has never been run for any period of time. The commutator
was absolutely clean and not a scratch.
It is now running great..(but it is really loud. I have to put on
a larger muffler).
Now to build my slab and find a transfer switch..
Any ideas on where to find a switch which is priced reasonably ??
Current estimates are approximately $500 to $700. There must be
used ones floating around somewhere.
===========================
I am really looking for info on where to find a REASONABLY priced
transfer switch. Now that the generator is functional I have to
finish "the rest of the story".
Merle
Merle
|
484.31 | | 28713::GORTMAKER | the Gort | Sat Jan 30 1988 00:15 | 9 |
| Square-D and Allen & Bradley make transfer switches both are fairly
expensive but top quality. The major expense seems to be the silver
contacts used in the switches some with 3-5 oz of silver....
You might be able to buy the switch yourself at an electrical wholesaler
I've bought at one here in the springs several times just by wearing
my badge and placing it on a cash ticket. Never been questioned.
-j
|
484.32 | generator care rules | BINKLY::WINSTON | Jeff Winston (Hudson, MA) | Thu Apr 21 1988 16:22 | 17 |
| I had planned to build an enclosure with a large open door attached to
the back of my house for my generator, so that I could store it there,
and then just open the door and run it (thinking of a cube about 4'
square). But, I just got this 'data' from John Perry at Fleet
Electric:
1) DO NOT OPERATE your generator in any enclosure. Operate it only
OUTSIDE, otherwise it may overheat from bad ventilation. This means
DO NOT run it in your garage, DO not run it in any 5-sided enclosure,
etc. If its raining, and you can't get a non-sided roof over it, run
it in the rain, the heat will dissipate the moisture.
2) Storing it outside (under a roof) is OK. Addition rust from
humidity, etc (compared to garage or inside storage) will maybe make
it last only 25 years as opposed to 30.
anyone care to comment?
|
484.33 | Exploding enclosure? | ULTRA::BUTCHART | | Thu Apr 21 1988 22:19 | 7 |
| re .-1:
Maybe build your enclosure with swing-out side panels and a hinged roof
panel so that when you need to run it you can open it up for good
ventilation?
/Dave
|
484.34 | transfer sw. and generator experience | NACAD::ARRIGHI | | Fri Oct 20 1989 16:06 | 35 |
| *** I originally posted the following note in the Electro_hobby ***
*** conference and thought that it might be useful here. ***
I installed the Gentran transfer switch myself and it was relatively
easy. It installs on the load side of the individual circuit breakers
for which you want back-up power. That means that if you throw
the main house breaker AND keep your hands away from the cables
coming in from the electric meter, you should be safe enough if
you want to install it yourself. The 5000 watt model with twin
watt meters and 240v capability cost me a little under $200 dollars
about 2 years ago. Many electrical supply houses carry it - I got
mine in Lowell, MA. I figure that if you can afford a generator,
you can afford to do things the safe way and install (or have
installed) a transfer switch. Incidently, this switch has its own
circuit breakers, but they are NOT GFI's. If you want GFI protection
when running under back-up power you will have to add it in another
box or install outlets with built in GFI's.
I use a relatively inexpensive and bare-bones Agtronic (now Coleman)
4000w recoil start generator. It's good enough for my use.
This basic unit comes with several different engines. I'd suggest
getting one with a cast iron sleeve for longevity. It does not
have low oil shutdown or a control panel, and it can not be called
quiet - I may decide to install an oversized muffler. It does,
however, seem to be worth the money, since I can replace it and
not spend more in total than some other units sell for. One more
negative though, the gas tank is only 1 1/2 gallons, so under full
load it will probably not last more than 2 hours before requiring
a refill. You could add a larger tank (I would definitely go with
the cast iron sleeve for extended operation), but you would have
to decide if the work is worth it. AND DON'T FORGET TO INSTALL A
GROUND FOR THE GENERATOR.
|
484.35 | what size type line cord? | TRITON::FERREIRA | | Mon Oct 23 1989 11:01 | 19 |
| re: .34
>>> the gas tank is only 1 1/2 gallons, not last more than 2 hours before
requiring not last more than 2 hours before requiring a refill.
You may want to consider buying or making your own auxillary
gas tank/can for longer operating.
What did you use for a line cord from your generator to the
Gentran? Is it something you made/fab. yourself?
Wire Size/type? Connectors and source?
I agree that there should be a ground for the generator.....
Did you use the standard grounding rod driven into the ground?
Naturally, your operating the generator outdoors. Did you find
a clean method, (thru a wall) of running your aux. line cord or
are you using the easy, thru an open window system since it's a
"hope, I never need it" operation?
thanks Frank
|
484.36 | | TEKVAX::KOPEC | I'm not. | Mon Oct 23 1989 12:02 | 8 |
| I think Gentran makes a remote plug housing that you can put on
the outside of the house and hardwire to the transfer switch inside.
Also, the twist-lock plugs are generally available at marine supply
places. I picked up some 30A parts for my generator hookup at Boat/US,
prices were better than at maynard electric..
...tom
|
484.37 | more on the transfer switch... | NACAD::ARRIGHI | | Tue Oct 24 1989 19:13 | 93 |
| This is to answer the questions and add some more details
concerning my transfer switch and generator experience in
-.34.
The Gentran switch mounts right next to the service entrance
and connects via a spare knockout on the main breaker box
through 18 inches of armored cable that is supplied already
connected to the Gentran. The connector into the Gentran
from the generator is a four lug twist-lock rated at 20 amps.
Mine is made by Arrow-Hart, and I like its construction and
strain relief. It is not supplied with the Gentran and costs
(if I remember correctly) about $15.00 at most any electrical
supply house. It does seem overpriced, but I guess it's
considered an industrial item. From this connector I used
10/3 w/ground, NM-B plastic cable. You can use 12 guage for
20 amp service, but my run to the permanent (future) location
of the generator is going to be about 140 feet. I started
stapling the cable about 18 inches from the connector --
leaving that much for a loop to the Gentran which allows me
to dress the cable from a direction that does not try to
untwist the connector. This cable is fairly stiff. You can
get this size cable with stranded conductors for flexibility,
but it's alot more expensive and not readily available. I
get all of my wire and cable from Spag's in Shrewsbury, Mass.
The four lugs are for the two phases of the 240v, the neutral
and the ground, all from the generator.
Before going further a few words are in order about the
Gentran. It comes in two flavors: The model 15114 rated at
1875 watts, with four 120v circuits and with a simpler, three
conductor generator connnector; the model 20216 rated at 5000
watts, with six 120v circuits, two of which can be ganged
together with a metal bar (supplied) to form a 240v circuit
for a well pump, etc. The latter model (which I installed)
has two watt meters to aid in load balancing. Both models
have an accessory 120v socket on them permanently wired to
the generator connection. I have a small light plugged in
here (mounted upside down to clear the toggle switches) so
that when I start the generator, I have some light to see
what I'm switching. Of course, with the latter model you can
only get 240v service if your generator has this output
available.
The 240v line from the generator is split in the larger
Gentran into two 120v legs powering half the switches each.
Each switch (down for line, middle off, up for generator) has
an associated circuit breaker (15 amp) of the button pop-out
kind. These breakers are only in the circuit when the
associated switch is in the generator position. In the line
position the breakers in the main box operate normally. I
used the 240v circuit for my well pump, which left four 120v
circuits (two on each phase) for other loads. One of these
goes to the refrigerator line and the others are used mostly
for lighting. I avoid using the microwave at the same time
as the frige. The starting surge to the frige is over 2500
watts and lasts for 2 to 3 seconds, although its running
power is only a few hundred watts. The well pump (1/2 hp)
needs about 1000 watts (500 per phase) running, but its
starting surge is short enough to be undetectable on the watt
meters. I wired an outdoor spotlight with switch into a room
lighting circuit that runs through the Gentran. This helps a
lot at night. Since I have electric heat, I count on a large
wood stove for heating during an outage.
Going back to the generator wiring, the 10/3 NM-B from the
Gentran connector goes to a box where it is spliced with wire
nuts to a 10/3 w/ground type UF cable for outdoors. This
leaves the box, goes through the wall via a PVC type LB
connector, and then into buried PVC conduit. With the
conduit you don't really need type UF cable, but I like to be
safe. Eventually, this will go to a utility shed with the
generator mounted outside but protected. For now I have the
generator on a heavy pallet next to the house with some
covering for the weather. Also temporarily, the 10/3 cable
is spliced to 12/3 to fit a regular 240v plug for connection
to the generator. I intend to find a way to eliminate the
12/3 cable.
The generator ground lug goes to an 8 foot U/L approved
ground rod (about $10.00 at Spags). The small ground rods
from Radio Shack will not do. They also rot away in a few
years. I intend to connect this ground to the service
entrance ground with #6 copper.
I leave the light switch on in a room without back up power
to let me know when normal power is restored.
That's most of the story. You are invited to shoot holes
in anything you disagree with.
|
484.38 | Transfer/Gentran alternatives? | AKOFIN::GLEASON | EFT_R_ME | Fri Dec 14 1990 16:12 | 12 |
| I want to install a 5 KW generator. I need the flexibility to power any
circuit in the house (read: total electric house with multi-day
outages). My electrician said that a 200 amp transfer switch would
cost $500 (GAG). Gentran doesn't give me the flexibility I want.
I have heard that there is a two box-1 key setup that offers the
same functionality as a transfer switch but at less cost. It may
be called something like "Kirt-Key System". Has anybody heard of
this and can you forward a pointer to specs/cost?
thanks
Bob G.
|
484.39 | How about Motorhome stuff? | SALEM::LAYTON | | Mon Dec 17 1990 09:58 | 8 |
| As I recall, my motorhome had a rather nifty setup using standard
breakers, except there was a metal linkage/bracket widget that blocked
the handles on the breakers. You had to shut one breaker off before
the bracket thing would allow the other to be turned on. U-Haul, which
does a lot of RV stuff, may have these listed in their catalog. There
are other RV catalog sources that may have these.
Carl
|
484.40 | | SSBN1::YANKES | | Wed Jan 16 1991 11:55 | 14 |
|
I'm intrigued by the notion of hooking a backup generator to the
breaker box by cutting off the main breaker and just plugging in the generator.
(With all the multitudes of caveats expressed previously in these replies and
the notion that this is temporary until a transfer switch gets installed...)
I understand that only the side of the breaker box plugged into will be powered.
What if the generator has two 110v outlets? Is it possible (safe?) to plug
each of these into outlets that are on separate sides of the box to power the
whole thing?
I suspect the answer is "sorry, this is taking an already unsafe
situation and making it worse", but if not, it would be nice. Thanks!
-craig
|
484.41 | Smaller == BETTER? | ORIENT::HUTZLEY | huMP Day | Wed Jan 16 1991 12:42 | 32 |
| re: -1
>
> I suspect the answer is "sorry, this is taking an already unsafe
>situation and making it worse", but if not, it would be nice. Thanks!
>
I think you might be asking for trouble, unless you have a HUGE
generator capable of delivering 220v/30+Amps.
I was thinking of a similar thing, only with a small generator.
Hooking in to the mains, with the breaker off, and only powering the
absolutly needed things like the fridge, and boiler...How bad do you
need a TV in a power outage, use a portable radio. HOw bad do you need
all lights in the house...use candles and flashlights.. How bad do you
need to run your range?...cook on the grill!
My purpose of having the generator would be not to maintain my
CURRENT standard of living, but rather keep my family from beeing froze
out and making sure they had food to eat.
IMHO, I think a smaller generator with limited capability would
teach a few of us about the value of electricity and maybe teach us
that we dont have to waste it, we can all get by on a little less. I'm
always chasing my daughters around turning the lights off after them. I
wonder if they'd be a little more concious of the lights if they had to
do without them for a while, like during a blizzard :-)....
Now......what breaker was that for the second floor lights? :-)
Steve
|
484.42 | Sheeze, ask a simple question... | SSBN1::YANKES | | Wed Jan 16 1991 13:00 | 13 |
|
Re: .41
Thank you for the morals lesson. You read entirely too much into my
question and made too many assumptions on what I'm trying to do. No, I am not
trying to maintain a "life as normal" situation, but rather I'm trying to avoid
rearraigning my breaker box so that all the key items (furnance fan,
refrigerator and a few lights) are on the only "emergency powered" side before
getting the transfer switch put in.
Now, back to the question...
-craig
|
484.43 | | VMSDEV::PAULKM::WEISS | Trade freedom for security-lose both | Wed Jan 16 1991 13:28 | 18 |
| If you have a generator with a 220V output, you can just plug that into a 220V
outlet, and both sides of your circuit box are powered.
Plugging into a 110V circuit, even only on one side, is much more dangerous.
In a 220V circuit, both leads are charged relative to ground. In a 110V
circuit, one of the leads IS ground. If you plug the generator into the house
wiring backwards, you'll be charging the chassis of every item plugged into
that side of the circuit box. Sounds like a prime way to electrocute people
all throughout the house simultaneously.
Assuming you survive...
I suppose you could plug into both sides. If there is only one AC wave from
the generator, then the 220V circuits would not be charged - both leads would
be connected to alternating waves that moved in unison, with a constant
differential of 0V.
Paul
|
484.44 | What do you mean by "side"? | EVETPU::IMPINK::mccarthy | Well Norm, lets go take a look. | Wed Jan 16 1991 13:30 | 7 |
| The "side" that you speak of, do you mean "the right side vs the left
side" of the panel. Every panel that I have seen destribute the power
from one leg of the 220V feed at every-other breaker on a side. Why?
So that 220V breakers can work! You may not have to do too much
re-arranging to get the important breakers on one feed.
Brian
|
484.45 | | SSBN1::YANKES | | Wed Jan 16 1991 13:37 | 20 |
|
Re: .44
Thanks for pointing that out. I did use "side" in the meaning of
"which side of the split 220", not "right" vrs "left" when physically looking
at the box.
Re: .43
Good idea about the 220. Sad to say, my only 220 breaker was removed
to make room for the track light breaker. (The 220 breaker fed the line for
the electric dryer -- and ours is gas...) Perhaps I'll put it back in. (Hmmm,
now which breaker do I add the track lights to? Maybe I'll have the electrician
put in a bigger box while he's at it. Might as well upgrade to 200A at the
same time. Oh, I can see a big electrician bill coming up...)
Thanks for all the comments!
-craig
|
484.46 | Can't connect a generator "backwards" | CADSE::ENGELHARDT | Reality is just a simulation on God's computer. | Thu Jan 17 1991 09:20 | 25 |
| RE:.43
>... If you plug the generator into the house
>wiring backwards, you'll be charging the chassis of every item plugged into
>that side of the circuit box. ...
Not true. The generator itself does not have a "ground" side - it just has two
leads, with voltage between them. "Ground" is determined in the panel, by the
connection to a copper rod driven into the ground. The chasses (sp?) are
connected to this ground by the house wiring and the generator hookup will not
change that.
If the generator did have it's own (copper-rod) ground, connecting it backwards
would cause a direct short, with generator fuses being blown, or melt-down
occurring:
___________ ___________
| | | PANEL |
| GEN | __________|___o_____|______ "hot"
| ______|____ / | |
| 110v | \/ | ___|_______ "neutral"
| --+---|----/\ | / |
|_____|___| \__________|___o/----|------ chassis "ground"
| |___|_____|
GND |
GND
|
484.47 | Its not that big a deal. | TALLIS::KOCH | DTN226-6274 ... If you don't look good, DEC doesn't look good. | Thu Jan 17 1991 11:46 | 20 |
| I've driven my house from my 110V 2200W single phase generator
without any problem. You just need to make a 20A male-to-male adapter to
connect the extension cord between the outlet and the generator. I'm sure
some people will be appalled by this, but as long as you use a little
intelligence and care, you can do things like this without killing anybody
or burning anything down.
I happen to have two 20A outlets next to each other in the basement
and they are on opposite sides/legs of the 220 coming from the street. A
second 20A male to male adapter jumpers the two outlets together so both
sides/legs in the house are energized. Its true that the dryer doesn't
work, but when I'm forced to use the generator, I don't care. When
reasonable care is exercised, its possible to hook everything up without
ever having an energized plug exposed.
I considered and rejected a transfer switch, not because I was
unwilling to spend the money, but because it would only allow six circuits
to be run from the generator. By energizing the entire house, I can run
whatever lights, etc. are necessary without having to rearrange the breaker
box.
|
484.48 | wind generators and selling energy to the electric company | ENABLE::GLANTZ | Mike 227-4299 DECtp TAY Littleton MA | Thu Jan 17 1991 11:59 | 13 |
| I've hunted around and haven't found exactly the right topic, but this
one looks like it might fit. My question is:
Does anyone have information or experience with selling electricity
back to the power company? I know that they must now buy electricity
from you (at some sort of modest rate) if you produce it correctly. My
sister-in-law lives on a windy bluff on the R.I. coast, and is
considering installing a wind generator. She's been looking around,
though, and can't find any suppliers or anyone knowledgeable in her
area. Any good sources of info or experience on this? What's involved?
What's it cost? Who supplies or installs?
Thanks in advance.
|
484.49 | | DICKNS::WELLCOME | Steve Wellcome (Maynard) | Thu Jan 17 1991 12:45 | 8 |
| Can't help you on wind power, but William K. Fay (508) 869-2118
can tell you about selling electricity to the power company.
His expertise is small-scale hydro; that's his business. I
don't know if he can help with the wind power or not; he might
be able to, at least with the beraucracy and parework involved.
(It *is* his business though, so I assume he'd charge for his services.)
A very friendly guy.
|
484.50 | Run your meter backwards. | XK120::SHURSKY | Jaguar enthusiast. | Thu Jan 17 1991 13:18 | 6 |
| I thought I heard (or read) that the (newer) electric meters just run backwards.
So if you set up your circuitry right, it is automatic. In that case you would
just need an electrician who knew his stuff (and the correct meter). Anyone
care to confirm or deny?
Stan
|
484.51 | I believe most meters will run backwards | SNDPIT::SMITH | Smoking -> global warming! :+) | Thu Jan 17 1991 13:50 | 12 |
| re: .50
If you are officially (legally) selling power back to the power
company, you must put two meters in with rachets and sell power back to
them at a lower rate than you buy it from them at (the wholesale rate).
If you dump power in without an agreement, most meters will run
backwards, and they will be buying power back at the 'retail' rate.
However, someday they will figure it out (maybe the month your meter
reads less than the month before) and you will be in big trouble, and
have to pay them the difference....
Willie
|
484.52 | | ENABLE::GLANTZ | Mike 227-4299 DECtp TAY Littleton MA | Thu Jan 17 1991 14:25 | 10 |
| Actually, I had heard both, but believe that the dual-meter
arrangement is what's required in MA, for the reason given.
"Hooking it up right" is obviously not a trivial affair, as your
generator has to match the phase of the utility's current precisely if
you want to sell energy rather than purchase a large amount for the
purpose of turning the local wiring into a big fuse.
Thanks for the recommendation. That's helpful info. I'll pass it
along.
|
484.53 | | SSBN1::YANKES | | Thu Jan 17 1991 15:32 | 10 |
|
I've looked into the notion of selling excess power back (no, it has
nothing to do with my backup generator question a few replies back!) and while
I forget the numbers, you have to be able to sell a pretty good amount of
electricity back or it really isn't worth it. The second meter is a very small
portion of the expense -- the worst cost is involved in the whizmo that
synchronizes your output's phase with that of the grid. It isn't cheap and
can really throw off the ROI numbers.
-craig
|
484.54 | | NOTIME::SACKS | Gerald Sacks ZKO2-3/N30 DTN:381-2085 | Thu Jan 17 1991 15:43 | 8 |
| re .53:
> the worst cost is involved in the whizmo that
>synchronizes your output's phase with that of the grid.
Wouldn't you need it anyway if you were using the grid to backup your
windmill?
|
484.55 | | ENABLE::GLANTZ | Mike 227-4299 DECtp TAY Littleton MA | Thu Jan 17 1991 16:03 | 19 |
| There are a couple of different ways you can set it up. One thing you
can do is set up an energy storage facility (usually based on
something like a large number of lead-acid batteries). The AC output
produced by it is easily and cheaply sync'ed to the grid's phase, and
you don't need to match the phase of your generator to the grid,
because there's no direct AC connection between them. But you also
can't sell energy back, and you need a large, well-maintained and
well-ventilated storage facility. It's also not as efficient because
of all the AC/DC conversions.
It's my understanding that this has a longer payback period than the
sellback approach, and, in some installations, may never pay back. The
sellback approach will almost always pay back over a long enough
period, mainly because of higher efficiency and lower maintenance
costs. It's also potentially dangerous (accumulation of hydrogen gas).
I'll be checking on the cost of the equipment which handles the phase
matching. I was under the impression it could be bought as a part of
the generator, but don't know.
|
484.56 | | SSBN1::YANKES | | Thu Jan 17 1991 16:28 | 44 |
|
Re: .54
>Wouldn't you need it anyway if you were using the grid to backup your
>windmill?
Not really if you use the battery concept mentioned in .55, but for a
different goal. Imagine the following:
Windmill Grid
| AC out | AC
V V
AC to DC AC to DC
converter converter
\ /
\ /
\ "smart box"
\ /
batteries
|
V
DC to AC
converter
|
V
breaker box
In this layout, energy from the two separate sources never meet as AC, so no
synchronizer is needed. (The "smart box" is used to only charge the batteries
from the grid when the batteries power levels fall to critical levels.) This
does have all the AC->DC->AC conversion efficiency losses, so it presumes that
you have enough excess production capacity to not really care about the amount
that is lost.
This is still a pain, however, due to the headaches of the batteries.
If I was getting into this ("when", hopefully :-), I'd probably just get the
synchronizer and sell the power back to the grid. In effect, I'd be paying
the $.0X per kwh (the differential between the retail and wholesale prices) as
the cost for the grid to act as my battery, but I'd also not be placing an
artificial limit on the amount of production capacity that is useful to me.
(ie. In the diagram above, any excess production capacity is wasted.)
-craig
|
484.57 | You could be permanently disconnected from service | CSC32::C_HOE | Daddy, what's transition work? | Mon Jan 21 1991 16:29 | 29 |
| <<< Note 452.47 by TALLIS::KOCH "DTN226-6274 ... If you don't look good, DEC doesn't look good." >>>
>>>>....as long as you use a little
intelligence and care, you can do things like this without killing anybody
or burning anything down.
That's exactly the problem. Not all folks think to turn off the
main breaker before attaching a backup generator. If the power
company is working on the lines; there is a potential of making
crispy critters of the line men. Most utility companies are
extremely safety conscious and grounds all lines that they are
working on. However, on some ocassions, subcontractors or rural
electric areas are contracted to less experienced contractors.
>>>...a transfer switch, not because I was
unwilling to spend the money, but because it would only allow six circuits
to be run from the generator.
Circuits that are critical to emergency power should be on
separate circuits for two reasons. The critical power would
automatically switch to the generator without your intervention
and switch back to your mains when power is restored.
If you contact your power company, they will tell you that
without the approved switching mechanism to connect in the
emergency power, they do have the right to REFUSE you service and
disconnect you from their line service.
calvin
|
484.58 | automatically, speaking | TOOK::ROSENBAUM | Rich Rosenbaum, TaN/OSF, 226-5922 | Sat Feb 02 1991 23:39 | 9 |
| .47: ... The critical power would
automatically switch to the generator without your intervention
and switch back to your mains when power is restored.
That's if you are using an automatic transfer switch (serious bucks).
Most of us I think would use a manual switch.
Rich
|
484.59 | Generator muffler? | RANGER::PESENTI | Only messages can be dragged | Wed Aug 07 1991 08:59 | 14 |
| I've got a 5KW Generac generator with a Briggs & Stratton engine. It's got
an 8 hour tank on it, that shelters the engine and generator. The overall
shape is a box. What I'm interested in finding out is if there is a noise
reducing muffler that can be attached to the engine in place of the existing
muffler. I'm not too worried about bulk, as long as I can still roll the unit
out the basement door.
It was nice, the last hot and humid night when power went out. I was able to
shower and run our bedroom AC. But with our windows closed, it was still loud,
and all I could think about was our neighbors who had just come home from a
bicycle trip to no water, not even a fan, and a bedroom window pointing towards
our generator!
-JP
|
484.60 | | FLOWER::HILDEBRANT | I'm the NRA | Wed Aug 07 1991 09:37 | 6 |
| Most of those generators have a "cheapo" muffler. You can remove the
standard muffler and attach threaded steel pipe. From the pipe,you can
attach many different shapes/sizes of mufflers....however...if you
want a portable setup,I would leave the existing muffler on .
Marc H.
|
484.61 | More questions on muffling a generator | RANGER::PESENTI | Only messages can be dragged | Thu Aug 08 1991 08:54 | 18 |
| The unit is about 2.5' wide x 3' high x 4' long approximately. It sits on a
dolly in the basement, and rolls out the walkout door. So, for portability, all
I would want is to be able to fit the muffled unit out the door. I might even
be able to live with attaching the muffler once it's through the door.
Questions: I assume the existing muffler is not threaded? How are they usually
attached? (Looks like a standard lawn mower muffler, but I never looked at the
attachment method.) Does it sound reasnable that I could fit the existing
muffler onto threads so it could be attached in place of the noise reduction one
if need be?
I guess what I'd be looking for is the most noise reduction I could get with
the smallest size. Where would I look for that kind of muffler? I assume not
a Midas shop. Would a motorcycle place do? Or is this something that would be
available at a hardware store or lawnmower/tractor distributor?
Thanks
-JP
|
484.62 | | FLOWER::HILDEBRANT | I'm the NRA | Thu Aug 08 1991 09:56 | 11 |
| Every muffler that I have seen,is threaded into the head. I think that
its 1 inch pipe thread. Could be 3/4 inch.
I would first look for mufflers at a engine parts store....like a
Briggs & Stratton type small engine store. Next,I would try a
store that sells gas engine generators and see if a muffler for
a large unit....say a 8 or 10 KW model would fit. That should
help. You should be able to use standard pipe fittings to hook the
whole thing up.
Marc H.
|
484.63 | Generator Recommendations?? | AKOCOA::SELIG | | Mon Aug 26 1991 16:38 | 11 |
| Does anybody have any experience or comments on 4-5 KW generators by:
Chicago Electric (Harbor Freight Salvage w/ 8 hp B&S eng)
Coleman (Tecumseh 8 hp eng)
Homelite (B&S 8 hp eng)
Thanks,
Jonathan
|
484.64 | | FLOWER::HILDEBRANT | I'm the NRA | Tue Sep 03 1991 15:57 | 5 |
| I had a 8 Hp Tecumseh generator......worked O.K. Started most times
on the first pull. Machine ran at 3600 RPM....very noisly. Also,
ran hot,but,I suspect that most in that style would be the same.
Marc H.
|
484.65 | Good generators mean $$$$$ | HPSRAD::HOWARTH | | Tue Sep 10 1991 10:34 | 24 |
| I have 4 KW Windco generator and a 900 W Generac generator. The
Windco was bought for use at home in case of power failures and
the Generac to recharge batteries on my boat.
The Windco has a 16 HP Briggs-Straton engine and operates at 1800
RPM rather than 3600 RPM as most inexpensive generators do. I
paid extra for this feature specifically for sound control. In
fact, I even purchased what was supposed to be a "quite" muffler
for an additional $75. The so called "quite" muffler was noisier
than the standard that came with the engine.
I ran the generator for about 5-6 hours after Bob along with half
of the neighborhood running theirs. I found that about 200 feet
away from my generator, the operating noise was masked by my
neighbor's unit that was over 500 feet away. After the first hour
of operation, I put up several sheets of plywood around the unit
to try to further contain the sound. The inexpensive sound barrier
did improve the situation.
The message is, you get what you pay for.
I wouldn't want to run my unit through the night during the
summer but I would run it during the winter when people don't
have their windows open. As to the Generac, I wouldn't run it at
night, on the boat or at home.
|
484.66 | Generator wanted | CSDNET::DICASTRO | jet ski jockey | Wed May 27 1992 15:28 | 7 |
| I am looking for a generator in the 4kw range, to back up a sump pump
The sump requires 2.4kw (so sayz the book), and a bit of spare wattage
for lights etc.....I am looking for gas powered, and portable. I would
have to carry it out of ther cellar to use it. Any recomendations for
manufacturers or types ?
Thanx/-bd-
|
484.67 | | MOUTNS::J_LAWSON | Aren't you glad we 'SAVE[d] WALDO CANYON'? | Fri May 29 1992 20:41 | 16 |
| I just bought a Honda 5000 Watt unit with electric start and 220V/110V/12V
outputs for $1800.
Cost per Watt was the major selling point, but the fact that it was recommended
for reliability and that 20 different dealers and hardware stores in town
regularly stock parts was a plus.
My unit has four wheels, but it appears to be available in a "wheel barrow"
arrancgement (which I *wish* I had gotten instead of the 4 wheels, because it's
only 2� feet tall, so pushing it around means either shoving it with your foot,
or bending over and pushing). Fortunately, I won't be bringing it up/down any
stairs!
Look for the reason I bought it in note 4600.
Mage
|
484.68 | Something to think about | VICKI::DODIER | Food for thought makes me hungry | Thu Jul 29 1993 11:33 | 27 |
| In a previous note, someone had mentioned a small Honda generator
that could produce 2KW continuous and run for approx. 9 hrs. on 3 gal.
of gas. This comes out to 3 hrs. of operation per gallon of gas. For
3 hrs. at 2KW, this is 6KW hrs. If you take 6KWH x $.13/KWH, it comes
out to $.98. This also happens to be the exact price of regular
unleaded per gallon at a station near me.
This of course is not taking into account purchase and maintanence
of the generating equipment. I have heard that large diesel generators are
much more efficient than the smaller home models regarding cost per
KWH.
This, to me, was very surprising. Assuming the above calculations
are correct, you can generate electricity for approximately the same
price as what PSNH sells it for (after the first 250KWHs). I've always
been told that you can't compete in this area because it's economy of
scale that wins out, but if PSNH (and others) continue to raise their
prices to pay for Seabrook, they are now approaching the break even
point.
Also, along the lines of some of the discussion in earlier notes, I
heard that the electric company was obligated to pay you for excess
electricity you generate "at the same rate they charge you", not the rate
that they purchase it it. Not sure if this is true or not, but if it
is, it makes this even more feasible.
Ray
|
484.69 | | JUPITR::HILDEBRANT | I'm the NRA | Thu Jul 29 1993 11:38 | 9 |
| RE: .68
In Massachusetts, the utility buys the electricity from you at the
wholesale price.
When I have run my WW2 Generator, the price per Kilowatt is around 13
cents.
Marc H.
|
484.70 | Source for Military Surplus? | BANKS3::DUKE | | Fri Jul 30 1993 08:58 | 6 |
| The previous note refered to WW2 a generator. Military surplus seemed
like a good idea to me. Is there a source in southern NH?
Peter Duke
|
484.71 | Ooops | VICKI::DODIER | Food for thought makes me hungry | Mon Aug 02 1993 10:39 | 13 |
| After thinking about my previous note, I realized there was a flaw
in my calculations. I based it on 6KWH / gal. of gas, but it takes 3
gal. to generate 6KWH with this generator. This means you have to
multiply the figure I came up with by 3, so it's really ~$.50 per KWH,
assuming you can get gas for $1/gal. There was also a much easier way
the calculate this, i.e. $1/gal. for 2KWH = $.50 /KWH.
That sounds a little closer to reality. As a previous noter
mentioned though, they have a WW2 generator that works out to about
$.13 /KWH. Not quite cheaper than PSNH, but if they keep raising the
price of electricity, it soon may be.
Ray
|
484.72 | true fuel cost may be lowered | SNELL::ROBERTS | mighty Mi$$i$$ippi | Mon Aug 02 1993 10:47 | 3 |
|
isn't gasoline consumed for non-vehicle use exempt from road tax?
You have to keep the records for the IRS.
|
484.73 | | JUPITR::HILDEBRANT | I'm the NRA | Mon Aug 02 1993 11:01 | 7 |
| If you really want to make your own power.....diesel is the only way.
Get a 10KW or larger used machine from "COMB" or "Northern Hydraulics".
If you can use the waste heat for hot water/heating...i.e. cogeneration
then you will save money.
Marc H.
|
484.74 | Automatic turn-on ... | ASDG::WATSON | Discover America | Tue Dec 20 1994 07:33 | 9 |
|
I want to be able to have a generator that will turn on when power
is lost without manual intervention. What will that take?
Does the electric start feature provide for this capability?
I would suppose it would also take some special wiring. Will any
commercial generator with idle control and electric start work for
this purpose? I'm looking at Coleman Vantage 7000s.
|
484.75 | special unit required | HNDYMN::MCCARTHY | He's here, but I'm still not ready | Tue Dec 20 1994 11:11 | 15 |
| >> I would suppose it would also take some special wiring. Will any
>> commercial generator with idle control and electric start work for
>> this purpose? I'm looking at Coleman Vantage 7000s.
Yes. Special wiring in of a cut-over device at least. I would think that the
generator would have to have the ability to start itself (ie battery to kick it
over).
Last I recall one of these cut over devices could be had for about 300.00 or so
(a small version!). I think I saw it in a Northern Hydrolics" catalog.
I have never installed one of these so I don't know how compilicated it can
get...
bjm
|
484.76 | Help with generator questions... | POWDML::MINEZZI | | Fri Oct 13 1995 15:17 | 23 |
|
How do you get a hold of COMB or Northern Hydraulics?
I need to look into generator expenses...I'm currently looking at a
place that uses generator power completely...It's too far off the
grid to be hooked up without a 18k dollar charge....
I was wondering if it was possible to design a system that was
decent, durable, and cost effective (for generated power anyway)...
Right now the house has a 7K primary and 5K backup, and doesn't store
power at all...
I've also heard that it's probably a good idea to look into 'gas'
powered appliances like a gas fridge, and gas dryer (minimal electric).
How would anyone else go about determaining the costs of running it
now, and improving it ??? Wind power ??? Should I hook up a bike
to a power generator, and get in shape at the same time ??? :-).
Thanks ! !! !
Ron.
|
484.77 | Neat project | FOUNDR::DODIER | Single Income, Clan'o Kids | Fri Oct 13 1995 15:49 | 23 |
| Sounds like you are on the right track with trying to minimize the
amount of appliances using electricity by going with gas. You may also
want to consider some storage via battery for DC powered lights, TV,
radio, etc..
If you were going to use this generator long term, I'd probably
look into an army surplus diesal unit. I used to have a source but
don't think I have it any more. Supposedly, diesal engines will run on
#2 fuel oil. If this were the case, you could probably pick up a 275
gal. oil tank and use it for the generator.
There's also a furnace that will burn either wood or oil. If you
already have the oil, it may make sense to go this route.
One of the things I've read that makes the generator efficiency go
up substantially is if you go with a water cooled engine, using the
coolant systems excess heat to heat your house. That way you're getting
both heat and electricty from the same source at little to no extra
cost over just producing/using the electricity alone.
Sounds like a neat project. Good luck and I hope this helps.
Ray
|
484.81 | Surprised at lack of activity | FOUNDR::DODIER | Double Income, Clan'o Kids | Tue Dec 10 1996 11:17 | 19 |
484.82 | backfeed easy for me | TARKIN::BEAVEN | Ban assisted spermicide | Tue Dec 10 1996 11:26 | 8 |
484.83 | How to backfeed | STAR::SCHEN | | Tue Dec 10 1996 13:18 | 12 |
484.84 | One way | FOUNDR::DODIER | Double Income, Clan'o Kids | Tue Dec 10 1996 14:22 | 23 |
484.85 | extremely scary stuff, folks.. | TEKVAX::KOPEC | When cubicles fly.. | Wed Dec 11 1996 14:35 | 12 |
484.86 | protect the family, yes | TARKIN::BEAVEN | Ban assisted spermicide | Wed Dec 11 1996 14:54 | 23 |
484.87 | | SKYLAB::FISHER | Gravity: Not just a good idea. It's the law! | Wed Dec 11 1996 15:03 | 12 |
484.88 | A few small nits | FOUNDR::DODIER | Double Income, Clan'o Kids | Wed Dec 11 1996 16:28 | 23 |
484.89 | | NOTIME::SACKS | Gerald Sacks ZKO2-3/N30 DTN:381-2085 | Thu Dec 12 1996 10:45 | 3 |
484.90 | ['host leads' should read 'hot leads'] | VAXCPU::michaud | Jeff Michaud - ObjectBroker | Thu Dec 12 1996 11:10 | 9 |
484.91 | throw that main! | HNDYMN::MCCARTHY | A Quinn Martin Production | Thu Dec 12 1996 11:25 | 15 |
484.92 | | SKYLAB::FISHER | Gravity: Not just a good idea. It's the law! | Thu Dec 12 1996 12:07 | 10 |
484.93 | word of caution on 110 to both legs of 220V | HNDYMN::MCCARTHY | A Quinn Martin Production | Thu Dec 12 1996 12:14 | 11 |
484.94 | | VAXCPU::michaud | Jeff Michaud - ObjectBroker | Thu Dec 12 1996 14:06 | 7 |
484.95 | You shouldn't ever have to.... | FOUNDR::DODIER | Double Income, Clan'o Kids | Thu Dec 12 1996 14:41 | 44 |
484.96 | 110v alteration to 220v? | MSBCS::BROCK | Son of a Beech | Thu Dec 12 1996 15:59 | 7 |
484.97 | | VAXCPU::michaud | Jeff Michaud - ObjectBroker | Thu Dec 12 1996 17:40 | 8 |
484.98 | use a transformer | CPEEDY::BRADLEY | Chuck Bradley | Thu Dec 12 1996 18:00 | 3 |
484.99 | Zap | VAXCPU::michaud | Jeff Michaud - ObjectBroker | Thu Dec 12 1996 22:08 | 13 |
484.100 | | STAR::DZIEDZIC | Tony Dziedzic - DTN 381-2438 | Fri Dec 13 1996 07:55 | 17 |
484.101 | | CPEEDY::BRADLEY | Chuck Bradley | Fri Dec 13 1996 09:14 | 5 |
484.102 | | REGENT::POWERS | | Fri Dec 13 1996 09:18 | 17 |
484.103 | | WLDBIL::KILGORE | How serious is this? | Fri Dec 13 1996 09:19 | 9 |
484.104 | Gentran specs and questions | EPS::SLATER | Marc, DTN 381-2445 | Wed Dec 18 1996 00:21 | 56 |
484.105 | How *do* the pros do it? | EPS::SLATER | Marc, DTN 381-2445 | Wed Dec 18 1996 00:27 | 8 |
484.106 | extention cords I would think | HNDYMN::MCCARTHY | A Quinn Martin Production | Wed Dec 18 1996 06:13 | 13 |
484.107 | | HELIX::WELLCOME | Steve Wellcome SHR3-1/C22 Pole A22 | Wed Dec 18 1996 08:34 | 15 |
484.108 | How Gentran switch works, I think | FOUNDR::DODIER | Double Income, Clan'o Kids | Wed Dec 18 1996 10:35 | 32 |
484.109 | Our FD drops off the generator and you plug in your appliance | TLE::TALCOTT | | Wed Dec 18 1996 10:38 | 8 |
484.110 | | HELIX::WELLCOME | Steve Wellcome SHR3-1/C22 Pole A22 | Wed Dec 18 1996 11:12 | 7 |
484.111 | More info on GENTRAN | CONSLT::WOLF | Cherokee N15802 | Wed Dec 18 1996 15:34 | 14 |
484.112 | ??? | FOUNDR::DODIER | Double Income, Clan'o Kids | Thu Dec 19 1996 14:19 | 6 |
484.113 | GENTRAN wiring | CONSLT::WOLF | Cherokee N15802 | Fri Dec 20 1996 08:45 | 20 |
484.114 | Fuel line adapters? | CONSLT::WOLF | Cherokee N15802 | Fri Dec 20 1996 08:59 | 10 |
484.115 | | MSBCS::BROCK | Son of a Beech | Fri Dec 20 1996 09:02 | 6 |
484.116 | A couple places to check | FOUNDR::DODIER | Double Income, Clan'o Kids | Fri Dec 20 1996 09:04 | 6 |
484.117 | 12kw GenPro generator experience | NUBOAT::HEBERT | Captain Bligh | Mon Jan 13 1997 08:25 | 82 |
484.118 | | BGSDEV::POEGEL | | Mon Jan 13 1997 08:53 | 7 |
484.119 | What's the price of comfort? | NUBOAT::HEBERT | Captain Bligh | Mon Jan 13 1997 10:41 | 24 |
484.120 | WARNING | NUBOAT::HEBERT | Captain Bligh | Mon Jan 13 1997 10:56 | 31 |
484.121 | Hondas are big $$$ | FOUNDR::DODIER | Double Income, Clan'o Kids | Mon Jan 13 1997 11:45 | 14 |
484.122 | Home Depot in Nashua has 4kw Generac's on sale - $100 off | TLE::TALCOTT | | Tue Feb 11 1997 14:55 | 5 |
| There are about 10 sitting out by the cash registers. One had a somewhat rusty
muffler. Maybe they rented some of them out during the power outage? Anyway,
they're regularly $698 and are being sold at $593.
Trace
|
484.123 | abuse of the return policy | HNDYMN::MCCARTHY | A Quinn Martin Production | Tue Feb 11 1997 20:35 | 4 |
| Those 10 are most likly returns from people who said "it didn't work" after
getting their power back.
bjm
|
484.124 | Homelite generators | HELIX::WELLCOME | Steve Wellcome SHR3-1/C22 Pole A22 | Thu Apr 10 1997 16:48 | 18 |
| After considerable looking around I finally got a Homelite
LRIE5500 generator at Logan Equipment in Shrewsbury, MA.
The Homelite seemed to offer the best price/performance
of anything I could find. For under $1200 I got 5,000
watts, electric start, four GFI-protected 120V outlets
(two dual sockets, one pair 15A, one pair 20A), a twist-lock
120V 30A outlet, and a twist-lock 120/240 40A/20A outlet,
5 gallon gas tank, and what seems to be a pretty good engine
(an 11hp Briggs & Stratton "Industrial Plus") with low oil
shutdown and automatic idle.
Homelite also has a recoil-start-only LRI5500 model available
as well as less fancy, lower wattage models and a couple
of heavy-duty contractor/industrial models.
Your mileage may vary, of course, but if you're looking for a
generator I think the Homelite line is worth consideration.
I was also very impressed by Logan Equipment as a dealer. Nice
people.
|
484.125 | 5000 continuous watts ? | FOUNDR::DODIER | Double Income, Clan'o Kids | Fri Apr 11 1997 10:33 | 15 |
| re:-1
With an 11 hp motor, is this 5000 "continuous" watts with a surge
rating of 6250 watts ? Just curious as most of the 11 hp units I've
seen are rated that way.
It's too bad they didn't have an automatic choke option. They sell
transfer switches that will automatically fire up an electric start
generator in the event of a power outage. It doesn't do you much good
though if you physically have to be there to work the choke.
Congrats on your purchase. You do know that now that you've bought
one it will be at least 2 years till you need it ;-)
Ray
|
484.126 | | HELIX::WELLCOME | Steve Wellcome SHR3-1/C22 Pole A22 | Fri Apr 11 1997 12:03 | 6 |
| Yes, it's 5000 watts continuous.
After all the tree damage we had in December and again a couple
of weeks ago, I don't expect to lose power again for the next
10 years!
|