Electronics > Projects, Designs, and Technical Stuff
Single phase to three phase sinewave converter
<< < (9/16) > >>
Yansi:
Do you have problems reading a text or what? I have written a CENTRAL EU.

The countries above mentioned (DE, AU, CZ, PL, SK) are pretty much what CENTRAL EU is about. And I am pretty sure I am correct with what I have stated.


--- Quote from: Yansi on January 14, 2019, 12:04:39 am ---But I am not sure, how these are really made in the US, as we do not have to deal with this garbage in central EU. (3ph present in almost if not every household).
--- End quote ---


And no bro, your interpretation of written text is again incorrect. All distribution is done in 3ph. No single phase transformer for distribution are being used.  Any point you can connect a house to, has a 3ph power available.   Having installed only a single phase meter is just cost optimization for low power demands, where 3ph would not justify.

But the cable into the house from the power company is always 3ph power, without an exception.  The meter is the last thing the power company owns, the rest is a problem of the house owner.

Please specify where exactly have you stayed, I will gladly check whether three phase distribution is available at the panel.

//EDIT: Maybe you just do not understand the difference: In the US and most Anglophonic countries, distribution is done in SINGLE phase ONLY, and there is NO way to get wired a three phase power in, even if you would like to. Unless you are willing to pay the power company to build those 5 miles of wiring to your house.

Changing a single ph to 3ph for a household in central EU means just having the power meter replaced!
CatalinaWOW:
Difference in detail.  Single phase distribution exists for local areas (like where I live currently), but unless you are really rural the distance to a 3 phase source is much less than 5 miles.  In my case it is about a half mile (one kilometer) to 3 phase power.  It still is not economical to bring that in.  Hence the market for VFD and other converter technologies.

I am sure that it is hard to generalize about this to entire regions or countries.  Lucky for you that you live where 3 phase is available.  Who knows whether the money spent on that has held back your economy in other ways?
IanB:

--- Quote from: soldar on January 14, 2019, 07:15:41 pm ---The notion that anywhere in Europe, indeed anywhere in the world, there is "3 phase supply in almost every household" is ludicrous.  Saying it is "available in every household" means it is already wired and installed. That is nowhere true.  If by available you mean you can pay to have it wired and delivered then that is just as true in America as it is in Europe. I do not know what idea you have of America but I assure you they have 3 phase over there too. At least they did in the parts where I lived.

I travel in Europe regularly for business and pleasure and I know what domestic "household" installations are like in most European countries. In fact I was in Prague just some months ago (lovely city BTW) and stayed at an RB&B and exchanged some conversation with the apartment owner about some wiring problem he was having in the bathroom where he had installed a clothes washer in a less than perfect way.

Again, maybe posters here from other countries can confirm or deny.

--- End quote ---

In the UK, domestic low voltage power distribution is almost universally produced by utility transformers as three phase, 240 V / 415 V wye (three phases plus neutral). The normal arrangement is that each dwelling gets one phase plus the neutral at 240 V with typically 100 A or maybe 200 A service. Farms, commercial premises and small businesses may have all three phases inside the building, though still usually distributed and used as single phase supplies. Therefore the typical domestic household does not have access to a three phase supply, however light industrial users can have such access for heavy machinery.

In many parts of continental Europe I understand that domestic dwellings may have three phase service as standard, with perhaps 60 A per phase. Normal outlets get just one phase at the nominal 230 V, but power hungry devices such as water heaters, central heating or ovens may use all three phases. Since every country in Europe has different supply standards this may vary depending on which country is being considered.
soldar:
Again, "3 phase supply in almost every household" is just not true anywhere. Installing it means paying for wiring, meter, etc. To cite that as a solution to someone who is asking about needing 3 phase, 100 mA supply is just ludicrous.

In Spain, new detached, single family homes, usually get 230volt and around 60 Amp service which is almost 14 KW and should be plenty enough for most homes. I suppose you could get more amps if you needed but that means a much more expensive installation and most homes simply do not need it. Now, I am sure that if you have special needs you can get three phase service but it is far from being "every household".

I participate in a Spanish forum for machinery and machinists and only people who have business shops with machinery would have three phase supply. The rest who have small shops in the homes or garages all use variable frequency drives for their three phase motors because getting three phases delivered is just too expensive and out of the question.

I am willing to be corrected if someone comes here and posts "I live in city X, country Y, and here all residential households have 3 phase supply as a matter of course". I would like to see that because it would be very, very, unusual.
IanB:

--- Quote from: soldar on January 14, 2019, 08:03:02 pm ---Again, "3 phase supply in almost every household" is just not true anywhere.
...
I am willing to be corrected if someone comes here and posts "I live in city X, country Y, and here all residential households have 3 phase supply as a matter of course". I would like to see that because it would be very, very, unusual.

--- End quote ---

Someone will come along and tell you that it is true where they live. It may not be true in Spain, or Britain, or France, but I have been told it is true in central and eastern parts of Europe. In such places every home has three phases at the switchboard and big appliances like heaters use a three phase supply as standard. You may not believe it, but that does not mean it is not true.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod