At present, the domestic smart power meter can be roughly divided into two major types of mechanical and electrical integration and full electronic. Mechatronics, that is, in the original mechanical power meter attached to a certain part, so that it can not only complete the required functions, but also reduce the cost and easy to install. The following small series introduces smart meter how smart smart meter works.
How to see smart meter
First: The general straight-in single-phase meter and three-phase meter can directly read the number minus the previous reading as the amount of electricity in this phase. The in-line meter has a thicker line, and careful observation has not been connected to the transformer.
The second type: Three-phase electricity meter connected through the current transformer connection of three-phase electricity meter, meter wiring has 10 wiring, to observe the current ratio of the connected current transformer, current transformer nameplate, there is a number For example, 100/5 150/5, etc., which is indicated by 5, is the amount of electricity multiplied by the current ratio measured on the meter, which is exactly the amount of electricity to be measured, plus the loss and line loss.
The third kind: The single-phase electricity meter measures the electricity of three-phase electricity, the electric quantity reads the way is in progress the method of connecting the electric meter reads the figure on the electricity meter multiplied by 3, if the electricity meter connected through the transformer should read the electricity meter to multiply Multiply the transformer current multiple by three.
How smart meters work
The user holds the IC card and pays the electricity to the power supply department to purchase electricity. The power supply department uses the power selling management machine to write the purchased electricity amount into the IC card, and the user holds the IC card to brush the non-contact type IC card in the induction area (hereinafter referred to as swiping card, the same below). The power supply can be closed, and the card can be taken away after the power supply. When the remaining power in the watch is equal to the alarm power, the power failure alarm (or buzzer alarm) is turned on. At this time, the user can resume power supply by swiping the card in the sensing area. When the remaining power is zero, the power is automatically turned off and the user must Once you purchase your card again, you can resume your electricity use.
Electronic smart meters are high-tech products that have been developed in recent years on the basis of electronic meters. Their composition and working principle are very different from those of traditional inductive power meters. The electronic smart meter is mainly composed of electronic components. Its working principle is to first sample the user's power supply voltage and current in real time, and then use a dedicated power meter integrated circuit to process the sampled voltage and current signals and convert them into The pulse output, which is proportional to the electrical energy, is finally processed and controlled by the single-chip microcomputer. The pulse is displayed as power consumption and output.
Normally, we refer to the number of pulses emitted by the A/D converter when the smart meter measures electricity once as the pulse constant. This is an important constant for smart meters since the A/D converter is in unit time. The number of pulses sent will directly determine the accuracy of the meter's measurement. At present, most smart meters use the design principle of a household A/D converter. However, some manufacturers produce multi-user centralized smart meters that use multiple A/D converters to share the energy. When queuing up, it is bound to cause the decrease of measurement accuracy. This point should pay attention to the working characteristics of the smart meter in the design selection. The smart meter not only adopts the design of the electronic integrated circuit, but also has the remote communication function and can communicate with the computer. Networked and controlled by software, compared to inductive meters, smart meters have great advantages in both performance and operating functions.
How to steal electricity from smart meters
1. Connect a wire to the front and rear ends of the front line of the meter. The meter should have a resistance. The point will take your line and the meter will not follow the line.
2. If you have bought a spear, you have to buy a shield. If there is poison, there will be antidote. Is it clear? But don't move it. Electricity is a commodity, and electricity is used to pay for it. Don't use electricity, don't use it! Stealing electricity illegally means stealing!
3, the two can rely on to steal electricity, the two home appliances out of the zero line, two household appliances do not go.
4, if you are looking for professionals to open the fire table, the internal analog conversion ade7xxx chip circuit change, and then redo the seal, it is probably not see.
5, more casual than the break method is to use infrared settings to deploy the equipment after the 485 interface connection cracked after the code, reset the data, but the programming port is a hard switch, but also the table.
6, the current meter shell has a seal, and not so before the kind of.
7, the meter has the effect of anti-theft of electricity can only be connected from the front of the meter to the zero line directly to the house, throw off the meter. Otherwise it will be investigated.
8, can steal power, ordinary electronic watch can use the inverted meter, LCD electronic watch can use the controller.
Editor's summary: The smart meter's working principle is introduced here. Hopefully it will help everyone. If you want to know more related information, you can pay attention to this website information.
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