DIYbanter - View Single Post

Tzortzakakis Dimitrios[_2_]

Ï Ýãñáøå óôï ìÞíõìá
...
In alt.engineering.electrical Thomas Tornblom wrote:
| writes:
|
| In alt.engineering.electrical Thomas Tornblom wrote:
| | writes:
| |
| | In alt.engineering.electrical Thomas Tornblom wrote:
| |
| | | Residential power in Norway is normally 230V three phase btw,
instead
| | | of 400V three phase. Their 230V outlets are two phase and ground
| | | instead of one phase, neutral and ground. Their three phase
outlets
| | | therefore are blue instead of red and have four prongs instead of
five.
| |
| | Is this the system where the voltage is 133 volts relative to ground
and 230
| | volts between phases (and formerly 127 volts relative to ground and
220 volts
| | between phases)?
| |
| | Yes.
| |
| |
| | If they still use that system, then I'm interested in buying a UPS
designed
| | for that. But it is my understanding it is phased out in cities and
hard to
| | find anymore in rural locations.
| |
| | It seems they are moving to 400V as well, but I know many Norwegians
| | are paying a hefty premium on their three phase equipment, like
| | heatpumps.
| |
| | My heatpump use an internally star configured 3x400V compressor, and
| | it would have been easy to wire it for 3x230V if they had brought out
| | all the leads.
|
| If all 6 leads of the 3 windings are brought out separate, then it can
be wired
| in star for 400/230 volt systems, and in delta for 230/133 volt
systems. But
| for Europe in general there would be little reason to do that. There
is also
| no reason to do that in North America, as we don't have any 360/208
volt systems
| at all.
|
| It would allow the Norwegians to buy less expensive heatpumps from
Sweden :-)
|
| It seems like a very simple and cheap thing to do.

My guess is that in the cities, they have already changed over to a
400/230
system, or at least a 380/220 system that hasn't been voltage adjusted,
yet.
What I've heard is the 220/127 system was a leftover in some rural areas
of
Norway, and also in Spain. Apparently Suadi Arabia has this system so
they
can make use of both European and American single phase appliances.
Mexico
also has 220/127 but primarily uses the 127 volt connection (and it's 60
Hz).
The really strange thing is Brazil has 220 volts all around the country,
with 60 Hz in some parts and 50 Hz in others, and used to use the American
120 volt 2-blade outlet/plug with 220 volts (you can be in for a surprise
with that).

--
There should be no problem with the frequency, the local US base (In
Gournes-decomissioned after the end of the Cold War) used a regular 15 kV,
50 Hz feed, from the cretan grid, which was stepped down to 4150 volts and
then to 120/240. All with US switchgear and tranformers! (NB for US guys.#10
wire gauge-10 mm2 main feed of residence, #12 -6 mm2 stove,#14-4 mm2
water heaters, #16-2.5 mm2 washing machines, dryers, #18-1.5 mm2
lighting.-approximately). I think that the personnel of the base used
standard US fluorescent light fixtures and other equipment, sone of it was
left as some of the buildings "inherited" by the greek state, were converted
by us to 230/400 volts, with regular Schuko receptacles.

--
Tzortzakakis Dimitrios
major in electrical engineering
mechanized infantry reservist
hordad AT otenet DOT gr
NB:I killfile googlegroups.