Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

On 7 Jan 2006 06:08:04 -0800, wrote:

| Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
| army diesel 3 KV one. I spose I could get a new alternator but seems
| expensive.

Did you really mean 3 Kilo *volt*?
--
Dave Fawthrop dave hyphenologist co uk
17,000 free e-books at Project Gutenberg! http://www.gutenberg.net
For Yorkshire Dialect go to www.hyphenologist.co.uk/songs/

Sorry 3KVA.

wrote:
Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.

You can get US-UK 110V-240V wallwarts from Maplins et al for about a
fiver IIRC - would that work?

David

Lobster wrote:

You can get US-UK 110V-240V wallwarts from Maplins et al for about a
fiver IIRC - would that work?

Not for a 3kW load, no.


--
Grunff

formulated the question :
Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

Assuming you meant 3 KVA then you might be able to use a 240v to 110v
building site transformer working backwards, 110 to 240. The frequency
from the generator might or might not be a problem, as the generator
will be designed for 60Hz and the transformer and UK equipment for
50Hz.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

On Sat, 07 Jan 2006 15:03:11 GMT, "Harry Bloomfield"
wrote:

| formulated the question :
| Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
| army diesel 3 KV one. I spose I could get a new alternator but seems
| expensive.
| Ta
| capn
|
| Assuming you meant 3 KVA then you might be able to use a 240v to 110v
| building site transformer working backwards, 110 to 240. The frequency
| from the generator might or might not be a problem, as the generator
| will be designed for 60Hz and the transformer and UK equipment for
| 50Hz.

Agreed
No problem running a *transformer* on a *higher* frequency.


--
Dave Fawthrop dave hyphenologist co uk
17,000 free e-books at Project Gutenberg! http://www.gutenberg.net
For Yorkshire Dialect go to www.hyphenologist.co.uk/songs/

Harry Bloomfield wrote:

Assuming you meant 3 KVA then you might be able to use a 240v to 110v
building site transformer working backwards, 110 to 240.

Beware - those transformers tend not to be continuously rated.

Also, isolation isn't needed here so an auto-transformer would be a more
efficient solution. You could use a 115 : 115 V isolating transformer
with its windings wired in series (series-aiding). The input from the
genny is connected across one winding and the output is taken across the
two windings in series. A 1 kVA rated transformer gives you almost 2
kVA of output.

The frequency from the generator might or might not be a problem, as
the generator will be designed for 60Hz and the transformer and UK
equipment for 50Hz.

A 50 Hz transformer will be OK on 60 Hz; it's working the other way
round that causes problems. (The load of course might be another
matter.) Anyway he didn't say is was American, I think you've just
assumed that 110 V implies 60 Hz, which may well not be the case.

--
Andy

Andy Wade wrote:

two windings in series. A 1 kVA rated transformer gives you almost 2
kVA of output.

not for long

NT

wrote:

Andy Wade wrote:
two windings in series. A 1 kVA rated transformer gives you almost 2
kVA of output.

not for long

No, continuously. That's the advantage of a auto-transformer - think
about it.

--
Andy

On Mon, 09 Jan 2006 12:59:25 +0000, Andy Wade
wrote:

| wrote:
|
| Andy Wade wrote:
| two windings in series. A 1 kVA rated transformer gives you almost2
| kVA of output.
|
| not for long
|
| No, continuously. That's the advantage of a auto-transformer - think
| about it.

No! autotransformers are more efficient than double wound
transformers, and so can be made smaller and cheaper. *But* they are
rated on temperature rise so if it is rated at 1KVA that is all you
should take out of it. Take 2 KVA out of it and it will eventually
produce a nasty smell of burning insulation.
--
Dave Fawthrop dave hyphenologist co uk
17,000 free e-books at Project Gutenberg! http://www.gutenberg.net
For Yorkshire Dialect go to www.hyphenologist.co.uk/songs/

wrote in message
oups.com...
Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn


Try http://www.justgenerators.co.uk/pages/transformers.htm

3.3 Kva Step Up Transformer E203030
a.. For use with 240V Power Tools
b.. 3300VA Rating
c.. 1650 VA Continuous
d.. 2 x 16amp 240 Volt outlets
e.. Tough GRP Case
f.. 2m of cable
g.. Fitted 16A 110 Volt Plug
All this for a little less than £80 - delivered! Looks like you would have
to use special plugs on the output side but I suppose you could make up a
couple of fly leads with standard 3 pin sockets on the end and keep them
with the transformer - saves rewiring all you tools/appliances etc......and
no, I'm nothing to do with the company, just googled for it.

Grumble

On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

Go down maplins, get a US/UK voltage convertor.

Rick

"Rick" wrote in message
...
On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

Go down maplins, get a US/UK voltage convertor.

Rick

What? a 3kW convertor? "Convertor" is a term reserved for gismos changing DC
into AC power.
Surely a large 1:2 step-up tranny, but it would weigh a lot and cost a tiny
fortune, but whoa, the genny probably gives out 60Hz, almost useless in UK!
#Sell it and re-invest in a 230V alternator.

"Jim Gregory" wrote in message
...
"Rick" wrote in message
...
On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?. Its
a ex
army diesel 3 KV one. I spose I could get a new alternator but
seems
expensive.
Ta
capn

Go down maplins, get a US/UK voltage convertor.

Rick

What? a 3kW convertor? "Convertor" is a term reserved for gismos
changing DC
into AC power.
Surely a large 1:2 step-up tranny, but it would weigh a lot and cost
a tiny
fortune, but whoa, the genny probably gives out 60Hz, almost useless
in UK!
#Sell it and re-invest in a 230V alternator.



Use one of those yellow site transformers which are 230 - 110. Beware
that some are only rated for 'tool duty' ie intermittant use. These
are graded in 'hernias' and for 3KW you probably want a two man hernia
version G

AWEM

On Sat, 7 Jan 2006 21:31:30 UTC, "Andrew Mawson"
wrote:

"Jim Gregory" wrote in message
...
"Rick" wrote in message
...
On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?. Its
a ex
army diesel 3 KV one. I spose I could get a new alternator but
seems
expensive.

Go down maplins, get a US/UK voltage convertor.

Use one of those yellow site transformers which are 230 - 110. Beware
that some are only rated for 'tool duty' ie intermittant use. These
are graded in 'hernias' and for 3KW you probably want a two man hernia
version G

What, and put it in reverse? Or step up to 470v or so?

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
Avenue Supplies, http://avenuesupplies.co.uk

"Bob Eager" wrote in message
...
On Sat, 7 Jan 2006 21:31:30 UTC, "Andrew Mawson"
wrote:

"Jim Gregory" wrote in message
...
"Rick" wrote in message
...
On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?.
Its
a ex
army diesel 3 KV one. I spose I could get a new alternator but
seems
expensive.

Go down maplins, get a US/UK voltage convertor.

Use one of those yellow site transformers which are 230 - 110.
Beware
that some are only rated for 'tool duty' ie intermittant use.
These
are graded in 'hernias' and for 3KW you probably want a two man
hernia
version G

What, and put it in reverse? Or step up to 470v or so?


Well Bob I would have thought it obvious that I'm proposing putting
the 110 into the 110 and getting 230 out of the 230. Transformers are
not unidirectional devices you know so there is no such thing as
putting it in reverse!!!!

AWEM

On Sat, 07 Jan 2006 21:17:43 GMT, "Jim Gregory"
wrote:

"Rick" wrote in message
.. .
On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

Go down maplins, get a US/UK voltage convertor.

Rick

What? a 3kW convertor? "Convertor" is a term reserved for gismos changing DC
into AC power.

ITYM "Inverter"

--
Frank Erskine

"Frank Erskine" wrote in message
...
On Sat, 07 Jan 2006 21:17:43 GMT, "Jim Gregory"
wrote:

"Rick" wrote in message
. ..
On 7 Jan 2006 06:08:04 -0800, wrote:

Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

Go down maplins, get a US/UK voltage convertor.

Rick

What? a 3kW convertor? "Convertor" is a term reserved for gismos changing
DC
into AC power.

ITYM "Inverter"

--
Frank Erskine

Oops, Freudian slip, I was only nearly right! Yup, inverter, as made by
Valradio OUAT
Jim

On Sat, 7 Jan 2006 21:17:43 UTC, "Jim Gregory"
wrote:

What? a 3kW convertor? "Convertor" is a term reserved for gismos changing DC
into AC power.
Surely a large 1:2 step-up tranny, but it would weigh a lot and cost a tiny
fortune, but whoa, the genny probably gives out 60Hz, almost useless in UK!
#Sell it and re-invest in a 230V alternator.

I agree with you, but I might take issue about the use of 'converter'.
When I was a child, the 'converter' was the
one-spindle-motor-and-generator in a small box that converted DC mains
to 12V for my train set!

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
Avenue Supplies, http://avenuesupplies.co.uk

In article ,
Jim Gregory wrote:
Surely a large 1:2 step-up tranny, but it would weigh a lot and cost a
tiny fortune, but whoa, the genny probably gives out 60Hz, almost
useless in UK!

What would you use with a 3kW genny that would be worried by 60Hz?

--
*Why can't women put on mascara with their mouth closed?

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article ,
Jim Gregory wrote:
Surely a large 1:2 step-up tranny, but it would weigh a lot and cost a
tiny fortune, but whoa, the genny probably gives out 60Hz, almost
useless in UK!

What would you use with a 3kW genny that would be worried by 60Hz?

--
*Why can't women put on mascara with their mouth closed?

Dave Plowman London SW
To e-mail, change noise into sound.

At 60Hz...
Not suitable, of course, for items using 50Hz synchronous motors &/or
mains-based timers /clocks, yet OK for heating, filament lighting; all
internal 50Hz transformers would cope with the 20% higher freq.
But seek advice on running fluorescent-tube ballasts and brush motors.
But just see if the genny config -can- be modified to European... to double
the existing voltage... at half the present current handling.
Jim

On Sun, 08 Jan 2006 20:05:12 GMT, "Jim Gregory"
wrote:

Not suitable, of course, for items using 50Hz synchronous motors

How many things are there that would be happy with a 50Hz generator yet
would object to a 60Hz generator ? There are very few that would
complain abotu the other way round, and even fewer this way.

If you're running your clock from a generator supply, then you have an
obvious problem anyway.

In article ,
Jim Gregory wrote:
"Dave Plowman (News)" wrote in message
...
In article ,
Jim Gregory wrote:
Surely a large 1:2 step-up tranny, but it would weigh a lot and cost a
tiny fortune, but whoa, the genny probably gives out 60Hz, almost
useless in UK!

What would you use with a 3kW genny that would be worried by 60Hz?

At 60Hz... Not suitable, of course, for items using 50Hz synchronous
motors &/or mains-based timers /clocks, yet OK for heating, filament
lighting; all internal 50Hz transformers would cope with the 20% higher
freq. But seek advice on running fluorescent-tube ballasts and brush
motors. But just see if the genny config -can- be modified to
European... to double the existing voltage... at half the present
current handling. Jim

Not many would be worried about clock or timer stability when running off
a 3kW generator. Otherwise they wouldn't bother - the frequency is very
approximate.

But in any case the chances are it's 50 Hz anyway. 110 volt generators are
common for site use.

--
*There are two kinds of pedestrians... the quick and the dead.

Dave Plowman London SW
To e-mail, change noise into sound.

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember saying
something like:

Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.

Chances are the output windings are in the form of two sets of 110V
tails which you then series up. At the moment they'll be paralleled up
for 110V.

Simple, easy, cheap and the way it's done normally for 220V on most
small gensets.
--

Dave

wrote:
Whats the best way to get 240 volts from 110 volt generator ?. Its a ex
army diesel 3 KV one. I spose I could get a new alternator but seems
expensive.
Ta
capn

Use a building site 240:110 backwards is the cheapest option, assuming
your tools etc wont run on 110. But it wont give you 240v. I'm not sure
what the regulation of those things is, but
- if its 10%, you'll get apx 240v - 20% = 192v full load, 216v no load
- if its 5%, you'll get apx 240v - 10% = 216v full load, 226v no load.


NT