LEDs (and just about everything with a switchmode supply too) use a bridge rectifier feeding a smoothing capactor. Yes, they're going to start regulating the things, but not because they're capacitive power factors. "Nonetheless the EU are determined to start regulating LEDs because of their power factor," You'll save more energy by switching off the oven/immersion heater 5 minutes earlier than you would by unplugging 20 mobile phone chargers every day for a year. Greenpeace say you'll save the world by unplugging them.
#REWIRE SENSUS WATER METER FULL#
Your phone charger might draw 10W at full chat. Your belkin adapter is not lying, modern lump in lead adaptors will be taking milliwatts when nothing is plugged in the other end. (reason being, that current and voltage being out of phase increases losses and reduces capacity for real power to be delivered by the grid.) Nonetheless the EU are determined to start regulating LEDs because of their power factor, without understanding the subject (they're usually capacitive devices, the grid usually lags, thus low power factor LEDs in every home will make the grid more, not less efficient). Power factor plays no part, and as a residential consumer, you're billed on real power.Ĭommercial premises might be billed on apparent power (kVA) rather than real power (kW), and hence they might benefit from looking at whether their power factor is costing them extra. You're averaging the sine waves then multiplying them. If you're measuring watts, it has no effect, as it's all real power and the power drawn will be the same no matter the phase between the two. overlapping, or does the voltage wave peak before the ampere wave?). Power factor is just about the degree to which voltage and current waveforms in AC systems are leading or lagging each other (they're both sine waves, but are they in phase - i.e. Welcome to the brave new world of "drive by metering". You can now sit somewhere down the street in an unmarked van and issue commands down the mesh. While this makes the whole project theoretically workable it makes it much more interesting security-wize. Classic product of "imbecile with an MBA degree inventing product requirements" (you can see them in the original retail energy white paper by the way).Ģ. All of these are 2.4GHz so 2.4GHz was chosen. However, instead of putting THIS (making it work) first, "Green Crime Level Reporting" was given a priority - making sure it talks to an in-house panel via wireless to show you how much of a green criminal you are. It allows you to do 3G, 4G or fixed links for uplink as you no longer uplink from every node. The way to make it work is to do a mesh with an N:M uplink model. It is also not future proof - GSM is being refarmed for 3G and 4G so the basic GPRS only modems which are put in the meters will simply stop working even in places where they work today. The cretinous idea of using 1:1 uplink model as used so far in the UK does not scale and does not work because it fails even the most basic radio propagation model. More if you use street furniture (lamps, broadband cabinets, electrical substations, etc) to seed the mesh. If a meter is outside (as they are putting them now), you can get up to 20-30 meters with one uplink in a residential neighborhood over the 800MHz band. You use an industrial band and you mesh the meters so that you can use N:M uplinks. We told all of the imbeciles in product management that THIS IS the only way it can work. It is "I told you so" moment for me and thousands of other engineers. Based on the cost, I suspect it will also include a proper antenna.ġ. Nothing to do with Pi-zero, it is using the different ZigBee band - going out of the rather crowded and useless 2.4GHz and into a band that has significantly better propagation in urban environments. Re: The pi-zero w is less than £10 and I bet it would do all they need and more.
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