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How to read the multi-function meter readings about the main functions of the multi-function meter
How to see the multi-function meter readings
According to the State Grid Corporation’s plan for smart grid construction, by the end of 2014, the national coverage rate of smart meters will reach more than 90%, and the household electricity meters of urban residents have been replaced by the original mechanical and electronic meters with smart meters. However, there are not many people who really understand smart meters in life, and there are many misunderstandings caused by ignorance on the Internet. This article briefly popularizes some common knowledge about related smart meters, with the purpose of letting everyone understand how it should look. .
Tools/Materials
Household Single-Phase Smart Electric Energy Meters
Methods/Steps
In Residential Users The installed smart meters are all single-phase meters, corresponding to the concept of three-phase meters. They are installed in the meter box and have been powered on and work normally. From the appearance, the screen is turned off every few seconds (the default is 5 seconds). The display page will be updated; in addition, there is a button on the casing that can be used, and the display page can also be updated every time it is pressed.
Generally speaking, the first screen after power-on It is the date. How should the display screen of the big electric meter be read here? Because this LCD screen is character type, it must be read by the combination of existing characters. Look at the picture: the reading method of the screen at this moment is the current time 14.09 .11
Press the button, the screen goes to the second page of the time screen: current time 13:41:39
After each key operation, you will come to the next screen. The current page is that the current total power is 0.00kwh. This screen is what everyone is most concerned about, that is, how much electricity is used by the watch at home! Because this is a new watch for me, there is no running word, and there will be readings at home.
Because some places have already implemented time-of-use tariffs and tiered electricity prices, regardless of whether they are used locally or not, the meter must support this function, so the following Several screens are generally the power display of the four tariff periods of “sharp”, “peak”, “flat” and “valley”
Generally speaking, the electricity meter also displays the electricity consumption of the previous two months, so the following screens are generally the electricity consumption information of the previous month and the previous two months.
If you see such a strange two screens, a total of 12 digits, please don’t be surprised, this is the ID number of this meter, which is the only identifier running in the power grid, I The one at hand is 12 1s, of course it is not formal, your home is a relatively formal ID number
Steps to read
The rest of the screens look like this, with current voltage, current, power and other item information. , if necessary, a corresponding article will be published later to answer. After all the displays are displayed, it will return to the first screen to start again
The function of the smart electric energy meter
(1) Metering function: with positive , Reverse active electric energy and four-quadrant reactive electric energy metering functions, including two functions of cumulative metering and real-time metering.
(2) Rate and time period function: By using economic leverage, the electricity price between the peak value and the valley value of electricity used is different. Electricity quality and economic efficiency.
(3) Maximum demand measurement:
(4) Measurement function: It can measure the active power, reactive power, power factor, voltage of each phase, and phase (including zero line) current, frequency and other operating parameters.
(5) Data display function: There are two ways for the smart electric energy meter to display power data: cyclic display and fixed display. The display content can be set by programming, and has the function of wake-up display after power failure.
(6) Communication function: The physical layer of the communication channel must be independent, and the damage of any communication channel shall not affect the normal operation of other channels; when an important event occurs, it should support active reporting.
In addition, the smart energy meter also has a variety of functions such as event recording, power failure meter reading, safety protection, clock, freezing, zero clearing, alarming, and auxiliary power.
