UK, part of which is England, is nominally 400/230V. As is the Eurozone in the name of harmonisation....Does 220V single phase in countries like England, Australia, & China use a hot (220v) and grounded neutral (0v)?
I am looking for a 380 to 220 step down transformer for use in China. Does anyone have a manufacturer & p/n that has been used in a similar application?
Despite what the IET (Institute of Engineering & Technology) and the EU (European Union) harmonisation committee may say the distribution voltage in the UK is near 433/250V.
A standard DNO (utility) transformer will be 11/.433KV ?Y (Dyn11).
To change all the transformers just to satisfy a whim of the EU isn?t financially viable. Added to the cost there is the practicality of not being able to parallel various transformers in a district, during switching procedures. Another little problem is vast areas of the system are falling apart at the seams. Any current rise is going to cause major problems.
Before I retired I worked in the iron industry. Our accountant had read somewhere of the cost savings to be had from reducing the supply voltage. I got roped in to his madcap idea despite all my protests.
Over a period of a few weeks I used the four 20MVA 33/11KV transformer OLTC?s to lower the voltage to the mythical 400V from 433V. As the voltage got lower the problems grew. Motors tripping on O/L, lighting failing to strike, etc.
The upshot was the accountant had his backside kicked, I put the voltage back to normal.
Yes - but the Dyn11 makes it clear what you meant.Just noticed, in place of the delta symbol in my post there's a ?
I'm just going to try something to see what works and what doesn't.
? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ^ ? ? ? ? ? ? ? ? ? ~ ?
Not a lot.
Finally, someone that speaks my langue.??????? to you too!
Sorry to resurrect this topic again. I found these photographs lurking around on my PC.
They should blow the myth of 230V out of the water.
I was under the impression that the EU harmonization was to take the countries that used 380/220V & the ones that were 415/240V like the UK & France & harmonize them all to 400/230V with no real change in the supply voltages, they were all within the allowable range then please correct me if wrong.
Related to than and the txfr pics here are a couple of waveforms that verify what you said.Sorry to resurrect this topic again. I found these photographs lurking around on my PC.
They should blow the myth of 230V out of the water.