Re: Failover generators

[Chris Hunter <cjhunter@xxxxxxxxxxxx>]

 >Gennys like to run at 80 - 90% load. A Genny at no load uses 50%
of=20
the fuel used at 100% load. A light load will lead to carbon build up.

'wonder if adapting a modern small car engine would be a viable route=20
... driving a big-car alternator, say ... their more sosphisticated=20
control systems might be helpful ... ???

Chris



Nigel Giddings wrote:

> Paul,
>
> Using generators can open a whole can of worms...
>
> I have a 'medium' size generator which I have incorporated in my
self=20
> build. It is rated at 11KVA and should allow the house to function=20
> normally if I lose the grid connection. We use Gas for Heating and
Hot=20
> Water.
>
> Things to consider:
>
> Noise - I have a full acoustic canopy
>
> Fuel - Petrol (Highly flammable loses it punch after 6 - 12
months),=20
> Gas (easy to handle bottles or connect to local mains supply)
diesel=20
> (red diesel cheaper, less volatile, doesn't go off with age)
>
> Fuel Storage - (How long before refuelling, I have 400 Litres, fuel=20
> delivered in 205 litre drums. Genny can run for 2=BD to 3 days)
>
> Location - Mine is 30 Metres from the house in the garden which
helps=20
> deal with Fuel, Storage and noise.
>
> KVA - You may need to run things as well as computers (monitors,=20
> routers etc. Lighting, cooling?) Gennys like to run at 80 - 90%
load.=20
> A Genny at no load uses 50% of the fuel used at 100% load. A light=20
> load will lead to carbon build up.
>
> RPM - 3000 is typical for smaller sizes, mine included. 1500 for
large=20
> units this gives less wear.
>
> Stability - Small gennys can be noisey on the o/p and this upsets
some=20
> UPSs. I have heard it said no more than 50% of load should be UPSs
due=20
> to harmonics created by SMPS and effects on frequency stability=20
> circuits of Genny. I have 6KVA of UPS with no issues.
>
> Self Start - Definitely the way to go. By using a small genny you
will=20
> need to split the wiring between protected load and un-protected
load=20
> at a cost.
>
> Maintenance - Annual Oil and filter change or after a number of
hours=20
> of use. Air cooled reduces fluids to monitor.
>
> My install was second hand from E-Bay (less than 100 hours) and
cost=20
> =A33K fitted (by me).
>
> HYPERLINK "http://photos.corbenic.co.uk/photos/photo213.html=20
> <http://photos.corbenic.co.uk/photos/photo213.html>"http://photos.corbeni=
c.co.uk/photos/photo213.html=20
> <http://photos.corbenic.co.uk/photos/photo213.html>
>
> Depending on load and duration a UPS may be a cleaner, quieter,
more=20
> easily maintained solution....
>
> HTH
>
> Nigel
>
> _____
>
> From: Paul Gale [mailto:groups@xxxxxxx=20
> <mailto:groups%40siliconpixel.com>]
> Sent: 24 June 2006 09:10
> To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
> Subject: [ukha_d] Failover generators
>
> Anyone have a small generator with automatic failover start? Does
it=20
> cost much to put something in place for say enough power to run a=20
> small amount of computer kit?
>
> Paul.
>
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>
>=20=20




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