volt drop calcs and 230 v

[7029 dave]

With that kind of voltage it should be no supply, nothing will work just too low!!

 

[Flanders]

With that kind of voltage it should be no supply, nothing will work just too low!!

7just realised Typo should of been 249 volts 251 volts:81:

 

[7029 dave]

yes lol coz I had job last year nothing working but had polarity, measured 155 v on the screws passed over to DNO joint had gone down in street.

 

[Jabbajaws]

yes lol coz I had job last year nothing working but had polarity, measured 155 v on the screws passed over to DNO joint had gone down in street.

Now this makes more sense. Nothing working which l didn't think it would....

 

[Knobhead]

Never mind the IET and EU harmonisation.

The specification for a DNO local transformer is for up to 1000KVA, 11/.433KV 4.5% reactance. 1500KVA the reactance rises to 5%

433V not 400V

 

[cmac70]

You could always do the good old way a taste to see what flavour voltage it is 230 or 400.

 

[Knobhead]

You could always do the good old way a taste to see what flavour voltage it is 230 or 400.

Which planet are you on?

230 = 400/√3, to all intense and purpose the same.

Which flavour of vanilla?

If you really want to be pedantic 230.94 = 400/√3

 

[Silly Sausage]

If you really want to be pedantic 230.94 = 400/√3

If you want to be really pedantic 230*√3 = 398.37

 

[Engineer54]

No idea what you're all arguing about you'll never going to be seeing 230 Volts or 400 volts in the UK or Europe for literally 10's of years, if ever!! lol!! It's all just fantasy world stuff!!

 

[Knobhead]

It could be done using the voltage regulators on the 33KV OLTC’s. The knock on would be disastrous. The LV network can’t cope with the current loading as it is now.

I tried lowering the voltage on an 80MVA system, I soon put it back to where it was.