And obviously your ADCs must have the bandwidth to capture all the harmonics. A lot of effort goes into detecting and correctly measuring different complex loads, this results in a very complex measuring logic with a very high execution frequency. The idea is really for the meters to measure as exactly as is possible even in very noisy environments.
In our case, the calibration of each meter was performed in our factory which had been certified by a third party certification body.
The equipment for calibration was purchased from yet another third party company which specializes in that kind of stuff. The power companies have no control over any of these steps. From an electricity metering production company point of view, they are just the end customers with no insight into the production of the electricity meter. But it would make them more money. Which value is greater? To sell electricity meters, you have to have them calibrated by a certified body in this case by our own production line.
The certification to do calibration is legally binding, and the meters are randomly checked now and then by the third party certification body. If the calibrated meters are not within specifications, the calibration certification is revoked and the site can no longer provide calibration.
This is more or less a death sentence to electricity meter production companies, or at the very minimum a large economical sink hole because they have to hire a certified company to perform the calibration for them. In short, if a certified company messes up the calibration, they are going to regret it.
There is likely no economical incentive which will make up for taking such a risk,. I should add that this is how it is done in Europe. Smart metering is the norm here, and the processes to safeguard the calibration process has been around for many years and is hopefully mature enough to be relied on. A few years ago my gas company replaced the meter because they said I was using an unreasonably low amount of gas. They never even asked if my usage really dropped.
OK, this temperature is to be considered to warm for the fridge. But for anything I want to sty and live in it is way too cold. I would accept such a temperature only if I would be really poor and the decision would be if I should buy gas or food. Interesting, sounds like the house needs some better insulation.
Best solution would be to tell the electrical company to sod off with their new fancy electrical meter :P. Or a really cool hack would be to generate the right frequencies to make the meters go slower instead of faster and get back the money that was stolen ;.
Gone are the days of sticking a neodymium magnet to the side of the meter. Interesting that you can add credit with the right frequency. But what about other weird loads? Plug between your switching load and wall socket a low frequency filter with inductors that can store energy to filter out spikes. Please be kind and respectful to help make the comments section excellent. Comment Policy.
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Report comment. You can even use non contact CT coil sensors. Begging for a meter using hall effect sensors to read the current. Literally entire books have been written about this, and probably several movies as well. Leave a Reply Cancel reply.
The home has a prepaid electricity metering system. How does it work? How do you get the account in your name? As of when do you take over the payments?
Is it easier or more complicated than working directly with Eskom or City Power? If you have never encountered the inner workings of a prepaid electricity system, these questions can be stressful, especially considering the worst case scenario:. Many homeowners with prepaid electricity meters actually prefer the system, for a variety of reasons. So, with all these advantages one can see that, in fact, a prepaid electricity meter is not the enemy but actually an asset.
Generally speaking, and depending on which company you are dealing with, you will pay your local council kWh rate. I get all those advantages with a prepaid electricity meter and I pay the same as everyone else? Most homeowners agree that this is a small price to pay for the accuracy and convenience of the metering system.
If it does so it will go into Tamper Mode and stop supplying electricity. If this is the case please contact the Citiq Prepaid Call Centre for assistance. The next way to detect visible and physical tampering.
Typical signs are if the seal has been removed from the meter, the bottom cover is loose or if any additional wiring connections to and from the meter can be seen. Another way is to monitor purchasing reports — if there is significant under-recovery compared to what is being supplied then chances are that there a meter has been tampered with.
A concerned landlord can then carry out an internal audit of a particular unit by comparing its electricity consumption to that of previous months. To help building owners mitigate tampering, landlords can log in to the Citiq Prepaid Meter Management System and draw a Low Consumption report that will indicate which meters have made low purchases over a defined period.
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