One for the DNO folks

[ColJack]

since I don't deal with the DNO side of things and therefore don't know much about them, I didn't want to offer an opinion when I didn't know what I was talking about... unlike some people ..

and which one was I again?
and why?

 

[geraint]

since I don't deal with the DNO side of things and therefore don't know much about them, I didn't want to offer an opinion when I didn't know what I was talking about... unlike some people ..

and which one was I again?
and why?

now who are you quoting this time.....

 

[ban-all-sheds]

Ah - geraint - you're back.

Any chance you could deal with this: http://www.diynot.com/forums/viewtopic.php?p=1582686#1582686 ?

 

[Stoday]

Eastern Electricity's policy used to be to preferably supply up to 1500 kVA at LV. Of course, that was subject to technical constraints. For example, if the consumer had an extensive LV network, such as an airfield, an LV supply would be unhelpful. He'd get an 11kV supply. I don't know if that policy continued after I left in 1996 and Eastern was taken over by EDF.

The policy varied according to the DNO. So East Midlands had, I think, a 500kVA threshold and were happy to supply at 11kV for 100kVA consumers if they wanted HV.

The larger capacity supplies need a substation on site; if the supply is at LV, it belongs to the DNO; if at HV the DNO owns the HV switchgear and the consumer the transformer & LV gear.

Nowadays DNOs no longer subsidise substations on consumers' premises so where there is a local substation, the consumer should normally opt for an HV supply and take advantage of the lower tariff.