New Development connection help

L

LeoMc

Hi

I was wondering if anyone could help with the following question, as it's been a long time since I have dealt with electrical design theory.

A local developer has submitted an application for connections to a proposed 200 plot housing development (each house requiring a maximum load of 200A). The nearest sub station is 400m away and has a 500kVA transformer with a demand of 350kVA. There is an existing 11kV overhead line crossing the far corner of the site, and several 11kV circuits laid in the footpath that fronts the site together with a single low voltage cable supplying street lights.
………………………………………….
When I have calculating the total load of the housing development do I add each individual houses load requirements, which would make a total load of 40kA?

If that as the case I would require a new substation with a transformer of around 30mVA with a demand of around 27.7mVA, taken from one of the 11kV circuits taken from the footpath that sfronts the site.

I am aware I am likely to be way off the ball here with my workings out, but thought it was better to show where I was in my line of thought. Any help is welcomed.
 
I've just seen a sentance in the onsite guide that show how electricity utilities factor in diversity for residential properties. It states that they allow for an average of an 2KW load per customer.

Over here the utilities allow a loading of 20A per household!! ...But then you have to factor in the obligatory AC loadings that will be a part of each household load...
 

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