Help! Max Demand KvA

[wmb1973]

Hi,

I am in the process of having a new connection installed, At the moment ours is a shared supply. I have calculated the load to be @ 300a overall. I would like to know what size supply I should be asking the DNO for. 3 phase or single phase, the latter would mean extra work though.

Your help would be appreciated.

Cheers

 

[Guest123]

We need a bit more info TBH such as type of premesis how you arrived at your calc etc etc.

As a side note, 100A is the largest single phase supply available.

 

[wmb1973]

Its a commercial premises (training centre).

Arrived at load by taking max load per item of equipment installed, but I have not applied any diversity.

Currently its on a 3 phase supply.

I originally asked for 100 KvA supply but the DNO are saying this is a large demand.

Perhaps a 75 KvA 3 phase supply is more like it?

 

[Engineer54]

Get yourself a qualified electrician in, to access your load and and correctly apply diversity. I think your going to be very surprised at the final figure, which will also probably save you a heap of cash as far as the DNO supplying those horrendous demand loads of yours.

What is the present supply rating, or the service head fuse ratings?? Even if they are 60A, you already have an available supply of 180A, which i wouldn't mind wagering, will in all probability cover your needs, and if not increasing to 80A, would!! lol!!!

 

[ackbarthestar]

I would would imagine that a small commercial unit is likely to have a 3-phase 100A supply which will give you a maximum of 75kVA. as stated

It does sounds as though your tutor has set you your Xmas homework ..... for you to complete !

 

[UKMeterman]

Hi,
If the supply is already exisiting then you could measure the exisiting load using an energy analyzer..