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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Electrical Questions >> help needed with max demands https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1248718259 Message started by supra59 on Jul 27^th, 2009, 7:10pm

Title: help needed with max demands
Post by supra59 on Jul 27^th, 2009, 7:10pm

hi lads can you guide me with the best and most simple way to work out the demand in a old mill, basically ive been asked to see if the landlord of the mill can reduce the agreed supply of is mill, as the rate of the electricity he is being charged is high and if he can show the max demand he now needs is lower than when the mill was built the unit costs will come down i would say most of the mill is not occupied at the moment there is aprox 7 units let all with a 60amp three phase supplys and out of them units only 3 will be using near that demand the other 4 are only using lighting and and power no machinery there is also 13 other units which only 5 is rentable which i need to take into consideration which as far as im aware 4 have 3 phase 60 amp supplies and one as a single phase supply 60 amp so in simple terms we have

12 x 60 amp 3 phase supplies
1 x 60 amp single phase
3 of them using machines etc

if you need anything else please ask thanks for taking the time to read and for any help you can offer

Title: Re: help needed with max demands
Post by Lectrician on Jul 27^th, 2009, 8:24pm

If he is being charged an agreed capacity, the supply sounds to be a sizeable one as opposed to a standard service. This would then indicate that a programmable meter has been fitted.

These meters log the maximum demand.

You can find the maximum demand on the meter by scrolling through the functions by pressing the button on the front.

Either that, or hire a logger and fit that for a week - typically costs around £100.

The supplier may well fit one for free.

With the limited info you have given there is no way to determine any kind of maximum demand, other than adding the loads together! There is really just not enough info.

Title: Re: help needed with max demands
Post by supra59 on Jul 27^th, 2009, 9:06pm

thanks for your quick reply i know the info is a little thin on the ground here for a easy solution but thats all i have at this time ive not been in the sub as the key as not been available so will get in to see if theres a meter i can look at, if not whats these loggers like to fit and where would i go to hire one sounds a good idea if all fails what other info can i get to help on coming up with an idea of demand thanks again lec for your quick responce

Title: Re: help needed with max demands
Post by Lectrician on Jul 27^th, 2009, 9:30pm

We curently use a compnay called inlec. I am sure their website is www.inlec.com, but this is not working. The simplest logger is called an SP Max.

They ship it out to you, you fit it (plug it in, place three clamps around the tails, reset the logger using a laptop, or a PC before you go to site).

Then use the supplied software to review the results.

I did a survey last week using a logger, I may see if I can attach the produced report later.

Title: Re: help needed with max demands
Post by supra59 on Jul 27^th, 2009, 9:54pm

great ok that would be good thanks again for your help

Title: Re: help needed with max demands
Post by Goodsparks on Jul 28^th, 2009, 6:20pm

I've used Inlec aswell, kit was good and the software on the bigger loggers was simple to use and pretty powerful with loads of reports and graphs.