3-phase E7 meter on single phase supply?

Chris Pearson:

NigelCoker:

If the heater doesn't need to charge to its capacity then it won't.

I am curious to know how it does that. It would need some form of predictive software.


It seems more likely to me that it will draw current until it is "full" and then release the heat in a controlled manner. If there is some left over, then clearly it will draw less energy the next day, but perhaps it has the ability to learn so that if there is heat left over one day, it draws less the next and so on.

I think you're on the right lines there and I am curious how it works myself but I can only quote what Dimplex say:

"Dimplex Quantum Electric Storage Heaters are some of the most advanced systems on the electric heating market. They boast a highly intelligent electrical interface, the Quantum iQ Controller, which uses self-learning algorithms to understand and respond to your heating requirements, and changing weather conditions. Another feature of Dimplex Quantum heaters is the state-of-the-art, user-friendly controls, including 7-day timer and temperature controls, as well as having open window sensing and adaptive start technology, making them EcoDesign Lot 20 compliant."

The heater is not connected to the internet so has no access to the met office website so doesn't know what the predicted weather will be tomorrow. I can only assume that it responds to the weather getting colder over a number of days. Perhaps a mild day followed by a really cold day may catch it out?

My world has been about bits of metal and nuts and bolts - we would need an explanation by a software engineer.

 

Sparkingchip:

When you talk about a 1.5 kw and a 1.25 kw heaters are you referring to input or output? Because they are not the same.


 Andy B.

Yes, I appreciate what you are saying. These are output figures so a 3.3kw input gives a 1.5kw output. My figure of 17.22 kw is from adding all the input ratings plus 3kw for the immersion element

UKPN:

 A most likely new meter technician quite correctly phones his supervisor because he has a legitimate query. Something he hasnt seen before. Just like tusanmi of questions on here every week. But being an easy target as a supply industry employee a few choice words are thrown about. 

Two single phase meters, one for 24 hour supply, the other an E10 off peak. Because the overall load is too much for one fuse, the load is split over two fuses. The service cable is adequate for the total load. Rightly or wrongly EON persuade the customer to have E7 tariff.

It would be impossible to fit a 3 phase meter because the off peak load would require a contactor and blocks and sub fuses and the space is limited.

In conclusion, an Ampy 5 terminal would do the trick, no contactor reqd, programmed for E7.

Regards, UKPN

 

I agree that it's better to ask if uncertain but he wasn't a new meter technician - he had been doing the job for five years. Thanks for your other comments though particularly that a 3-phase meter would not work. That was the suggestion made by the meter technician's supervisor and is my reason for preferring a qualified electrician to do the work.

Sparkingchip:

That’s a picture of a Smart meter with an E7 supply connected that I have posted in other discussions on this forum.

Am I correct in thinking (not being an electrician) the cables LL and LN feed a Normal rate Consumer Unit and the cables 5L and 5N feed an off-peak Consumer Unit that has storage heaters?

• Change tariff.

• ”Behaviour change” adapt your lifestyle and routines to fit the tariffs, so don’t use appliances that can run on E7 tariffs overnight at half six in the evening.