General > General Technical Chat

Reverse your smart energy meter with this simple trick!

<< < (3/7) > >>

langwadt:

--- Quote from: Zero999 on August 13, 2021, 02:48:08 pm ---
--- Quote from: Red Squirrel on August 13, 2021, 11:49:25 am ---Wow that's pretty bad.  I could see that easily happen accidentally and lot of people getting screwed over by that once they are "caught".

--- End quote ---
As mentioned above, intent is everything. If it's caused by a fault in the meter and a load, which just happens to emit the right kind of noise for it to roll backwards, then you'll probably get away with it. On the other hand, if it can be proven you designed a device, specifically to emit noise, with the intention of causing the meter to roll backwards, then you can be done for fraud.

I also wouldn't be surprised if the power company could theoretically, get you to pay them, for any electricty they gave you for free, even if it was their error, but they would have a hard time proving it and it would have to be split up into reasonable, instalments, over a fair time period.

--- End quote ---

I'd expect that if the bill is high the power company will say the meter is has been tested so pay up, if it bill is low they
will assume you cheat and tell you to pay up an estimate based on previous bills

Kleinstein:
The old article about meters reading high with LED lamps was a case of a load outside the permitted limits. It this can the meter is allowed to read a little higher than normal. For normal loads this does not make a difference, as normal loads are usually much more well behaved. Even if it reads some 10% high an a poor designed Chinese LED lamp this would not make a big different (maybe $1). It would still read OK with the significant consumers like water heating, cooking, washing mashine or air conditioning.

A poor load could also cause an error to the other side - but still, what is the savings if it reads the poor power factor LED low and still gets it right with the main part. It is illigal to manipulate / fool the meter and it is also illegal to cause such EMI. It can effect neighbors and they may complain about poor grid quality and find the culprit.  Modern smart meters may detect and report excessive EMI,  very poor power factor or similar.

TheSteve:
I lost one leg of the power coming into my house, the smart meter didn't notice or generate any fault. I'm not convinced they are very smart.

coppice:
The article is pretty vague. It would be interesting to see a proper description of the type of dimmer causing this, and the waveforms it produces.

coppice:

--- Quote from: Alti on August 13, 2021, 10:48:37 am ---I suspect these meters are only designed to deal with EMC-compliant loads. Had someone used not-so-compliant load, the returned results could have included errors out of specified bounds.

--- End quote ---
These meters are generally only tested in accordance with WELMEC, OIML, IEC62052-xx and related specs (except in the US, which has its own ANSI specifications). If the IEC specs don't call for a test, and the utility doesn't lay down the test as an additional requirement, it won't be done. Good meter developers do a lot of additional internal testing for a variety of potential problems, but there is no commonality in those tests, and no requirement to publish results.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod