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Topic Title: Energy Demand.
Topic Summary: Supermarkets
Created On: 06 October 2012 10:04 PM
Status: Read Only
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 06 October 2012 10:04 PM
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nm234

Posts: 35
Joined: 19 March 2008

I'm trying to setup an examination paper with a question related to power consumption by a typical Tesco's Extra, a Large Sainsbury's or even an Asda. What kind of power consumption does a typical large supermarket pull at maximum demand?

I'm guessing 3MVA @ 0.80pf? thus 2.4MW Active and 1.8 Reactive

Then what i am trying to do is resolve a typical value for the aggregate Inductance/Capacitance/Resistance x 3 (as there are 3 lines), balanced.

3MVA/3 = 1MVA per line.

I am guessing to find my impedance Z per line (230^2)/1MVA = 52.9milliOhms.?
 07 October 2012 04:38 PM
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ukmaharaja

Posts: 11
Joined: 26 May 2005

Hope you have assumed supply voltage 3 phase 0f 400 v ie 230 v per phase.
regards,
 16 October 2012 12:10 AM
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nm234

Posts: 35
Joined: 19 March 2008

Yep
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