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## Hifarion

40 posts

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 Topic # 112672 17-Dec-2012 11:49 This is a question for the electric boffins... We have an electric meter, and when they calculate the bill they mulitply our reading by 60x We thinks its a bit much so wanted to check the mulitplyer, our metre has 6000 imp./KwH Can anyone confirm that this results in a factory of 60x...Thanks
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## gzt

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 Reply # 733465 17-Dec-2012 12:02 hifarion: We have an electric meter, and when they calculate the bill they mulitply our reading by 60x How do you know this?

## Hifarion

40 posts

Geek

 Reply # 733468 17-Dec-2012 12:06 Its written in pen on the meter, and its on our account as part of the equation However, the power bills we've been getting a insanely high, and the multiplyer is the only factory that could be wrong - for example, the metre says we've used 45 units over the weekend (when the building was closed)... 45units x 60mulitplyer = 27002700 x 23.77 cents = \$641!!!!!!!  We've been getting \$9k - \$11k a month power bills and none of the power co's are interested in helping. We run machinery, but nothing that absorbs this kind of power

## wellygary

1973 posts

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 Reply # 733488 17-Dec-2012 12:26 Well with 10K bills a month, you have a fairly healthy incentive to track this down, ( and can presumably spend some of the savings in thie project)I would get a sparky over to see if they can install a second meter for you, that is between the existing meter and you mainboard- so you can keep an eye on what is actually happening, The other cause could be a faulty item of equipment- again have a sparky have a look round your place

## gregmcc

1081 posts

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 Reply # 733492 17-Dec-2012 12:30 Sounds like CT metering, where the CT's are a ratio of 60 to 1, installing a check meter may be impraticle, but you can rent a peice of equipnment from Tech Rentals that will require an electrician to connect up, run this for a week or 2 and compare it's reading with the meter readings, that way you will get an idea if things are not reading right.

## gzt

5746 posts

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 Reply # 733509 17-Dec-2012 12:52 What is the brand and model number of this meter?

## Hifarion

40 posts

Geek

 Reply # 733549 17-Dec-2012 13:15 The metre is Enermet, made in Finland I've googled the ration for PT and CT calculations, but this metre doesn't have anything that resembles these, it just has 6000 imp / Kwh Thanks

## gzt

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 Reply # 733551 17-Dec-2012 13:16 Which model exactly?

## gregmcc

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 Reply # 733563 17-Dec-2012 13:30 gzt: Which model exactly?If your talking about which one from Tech RentalsDranetz-BMI Power Xplorer PX5Hioki 3169-20 Clamp On Power AnalyserYou really need to get your electrician involved as this would be the best person to determine which one to rent and to hook it up

## Hifarion

40 posts

Geek

 Reply # 733568 17-Dec-2012 13:37 This is a shot of the metre, I've tried to work out how they got a mulitplyer of 60x.....Sorry for the poor quality, it was dark in the metre room...

## MikeSkyrme

257 posts

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 Reply # 733571 17-Dec-2012 13:41 I believe the 6000 imp / kW is a reference to a pulsed output for the meter. If you provide a model numwer for the meter, it would be easier to look at CT and VT ratings, and whether the A/D conversion may have something to do with the calculation.This is a three phase meter? Michael Skyrme - Instrumentation & Controls

## Hifarion

40 posts

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 Reply # 733573 17-Dec-2012 13:46 Yep, I'm 99% sure its a 3 phase metre. The issue is, there is no possible way we consumed \$641 over the weekend, the factory was shut - and our sister company in Auckland struggle to pull in a power bill over \$1,000 per month and they are bigger than us. SO the only factor I want to challenge is the multiplyer, but the Power Co's don't really want to help.... Unfortunately this is all the info that is on the metre, I think the next step is to get a secondry metre at our expense to test... Thanks

## gzt

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 Reply # 733581 17-Dec-2012 13:50 Are you still with Trustpower like it says on the property sticker?

## MikeSkyrme

257 posts

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 Reply # 733587 17-Dec-2012 13:53 Hifarion: Yep, I'm 99% sure its a 3 phase metre. The issue is, there is no possible way we consumed \$641 over the weekend, the factory was shut - and our sister company in Auckland struggle to pull in a power bill over \$1,000 per month and they are bigger than us. SO the only factory I want to challenge is the multiplyer, but the Power Co's don't really want to help.... Unfortunately this is all the info that is on the metre, I think the next step is to get a secondry metre at our expense to test... Thanks As per GreggMCC's comments, you can hire a portable PQM (three phase) which will measure / monitor everything that is happening on your supply.A sparky should be able to hook this up for you without much trouble. Michael Skyrme - Instrumentation & Controls

## Hifarion

40 posts

Geek

 Reply # 733588 17-Dec-2012 13:53 Nope, genesis. They won't help, their stance is that they only care for anything up to the metre - from there onwards is our responsibility. So was hopping the glyphs on the metre would mean something to someone, and confirm that our mulitypler of 60x was correct/incorrect.

## MikeSkyrme

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 Reply # 733589 17-Dec-2012 14:00 Hifarion: Nope, genesis. They won't help, their stance is that they only care for anything up to the metre - from there onwards is our responsibility. So was hopping the glyphs on the metre would mean something to someone, and confirm that our mulitypler of 60x was correct/incorrect. There is nothing on your meter which indicates a requirement to multiply / divide by 60. The kW hours displayed is as it is measured by the meter. Michael Skyrme - Instrumentation & Controls
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