How the numbers on the meter are calculated

1.Typical straight-forward single-phase and three-phase meters can read the numbers directly, minus the last reading to get the amount of electricity at this stage.

2.The three-phase meter is connected by the current transformer connection, the wiring of the meter has 10 wirings, the current ratio of the connected current transformer should be observed, the name plate of the current transformer is marked, all of them are marked with a number ratio of 5, such as 100 5 150 5, etc., the number read on the meter is multiplied by the current ratio is the amount of electricity measured, and the loss and line loss are added accurately.

3.The single-phase meter measures the amount of electricity in the three-phase electricity, and the electricity reading method is the way to connect the meter directly, and the number on the meter is multiplied by 3, if the meter connected by the transformer is to read the meter number multiplied by the current multiple of the transformer and then multiplied by 3.

4.The smart meter only has an LCD screen, and if it is a single phase, it will directly display the total power and remaining power, and you can read it directly. If it is an IC card meter, only the light-emitting tube display is a single graphics card meter, and there will be a small red dot on the meter.

The red dot jumps to the total use is the total use, and jumping to the rest is the remainder. Dual graphics card table, read above or below can be. Direct readings of three-phase prepaid meters.

The mutual inductance is multiplied by the meter reading by the transformer magnification.

At present, most of the electronic meters are used, which are processed by electronic special chips through electronic pulses, and then drive the stepper, and there is a roller digital counter to accumulate.

1. Pass-through meter: use the current month's reading, the previous month's reading, and the practical electricity.

2. The electricity meter through PT and CT :(with the reading of the current month and the reading of the previous month) * PT magnification * CT magnification Practical electricity.

aThe following meters of the meter have a small red box at the end, and there are one or two digits in it that are decimals, and the power supply bureau does not count the decimal part when reading the meter.

The base of the current month's table minus the bottom of the month.

Is it a three-phase meter or a single-phase meter? The question is not on point.

Subtract the initial scale from the number of degrees after use to use the scale of the time of use! Then you have to know the ratio of the transformer! 75 to 5 or 100 to 5!

For example, the transformer ratio of 100 to 5 is 20, and at this time, you can get how many kWh of kWh are used by multiplying the scale by the transformer ratio of 20.

Finish! The power of the meter is from left to right! The unit is counted from right to left, and so on! The last value is red, which is equivalent to the number after the decimal point, and is generally not counted in the used value! So it can not be counted!

The meter numerically shows 307 kWh. The following number is ten words for one kilowatt-hour of electricity.

Such meters are old-fashioned. It is mechanical, and it has now been replaced with an electronic watch.

A string of numbers on the screen will directly display the integer and decimal of the meter reading, the model of the meter is different, and the data displayed on the LCD screen may be different; You can press the wheel display button next to the screen to switch the display interface, and check the data displayed on the LCD screen with the words "current total power" or "current positive active power", that is, the cumulative power consumption of the current meter.

The meter numbers are from right to left, the black number is the integer part of the meter's electricity consumption level, and the red number is the decimal part. If the displayed stupidity is not 11111, then the indicated power consumption is the degree. The red number goes from 1 to 9, and the black number adds 1.

The meter is cumulatively counted, so in order to derive the electricity consumption of each month, you need to use the current reading value to subtract the previous month's read value to get the total amount of electricity used in the current month. If the reading is 999 degrees this month and 900 degrees last month, then the electricity consumption of the current month is 90 degrees.

If you are using a smart meter, it is recommended that you can check the current meter readings through the LCD screen on the meter; A string of numbers on the screen will directly display the integer and decimal of the meter reading, the model of the meter is different, and the data displayed on the LCD screen may be different; You can press the wheel display button next to the screen to change the display interface to view the data displayed on the LCD screen with the words "current total power" or "current positive active total", that is, the cumulative power consumption of the current meter.

If you are using a mechanical meter, you can see the cumulative electricity consumption recorded by the meter through the numbers contained in the bridge in a row of windows on the dial of the meter. In general, the red window represents the decimal part, which is 1 decimal place; The black window represents the integer part, starting from the far right, eliminating the first digit as the single digit, and so on.

If you need to calculate the actual electricity consumption during a certain electricity consumption period, the electricity consumption = this meter reading - the last meter reading reading, if your meter is equipped with a transformer, you also need to multiply the multiplier of the transformer.

We hope you find ours helpful.

The power of the meter is calculated as = (stop code - minimum) x rate (if equipped with a transformer).

At the very least, it's the meter reading when the meter is installed.

The stop code is the reading when calculating the electricity bill (the next time the bill is settled, it will be the new at least, because there are larger numbers in the meter that will become the new stop code, as in the past).

The magnification is the measurement multiple formed by the transformer and the wire passing through it (for example: a 150 5 transformer wire passes through one of the multipliers is 30, passes through two of the multipliers is 15, and passes through one of the multipliers is 10).

Meter degree calculation formula: w u i t, just use this basic formula One degree is equal to one kilowatt per hour, if there is no magnification, then the meter reading is how many kilowatt-hours of electricity, if the current transformer or voltage transformer is connected to the meter, then the above formula is multiplied by the ratio is the degree of the meter within the specified time, the unit is kilowatt hours.

The electric energy meter is an instrument used to measure electric energy, also known as the watt-hour meter, fire meter, kilowatt-hour meter, which refers to the instrument for measuring various electrical quantities, commonly known as the watt-hour meter and fire meter.

By application: industrial and civil meters, electronic standard meters, maximum demand meters, complex rate meters.

According to the structure and working principle: induction type (mechanical type), static type (electronic type), electromechanical integration type (hybrid type).

According to the nature of the connected power supply: AC meter, DC meter.

By accuracy level: commonly used common tables: etc.

Standard Table: etc.

According to the installation and wiring mode: direct access type, indirect access type.

According to the electrical equipment: single-phase, three-phase three-wire, three-phase four-wire electric energy meter.

Now 84 kilowatt-hours of electricity are used, and if calculated per kilowatt-hour, then with two yuan, the calculated electricity cost is 126 yuan.

The calculation method of the meter degree is = (stop code - minimum) x multiplier.

For traditional mechanical meters, the amount of electricity can be read directly from the reading window, and the readings from front to back are: thousand, hundred, ten, single digits, and the red part behind is the value after the decimal point, which is usually not calculated when looking at the meter reading. Because the device that displays the readings on the meter is a cumulative counter, the value you see now is all the electricity used in the time since the meter was activated.

Note that the readings should be applied to the meters in residential buildings (directly connected meters), and sometimes the meters are connected to the power lines through the current transformer, so the readings should be multiplied by the ratio of the current transformer ki (i.e. the magnification, which is indicated on the transformer).

Don't use 3, if your transformer is 400 5, it is 80 times, directly use the meter reading multiplier, the specific algorithm is: the number of meter readings this month - the number of meter readings last month Multiplier = the practical number of this month. (The meter should be a small meter below 3*3(6)a).

Lighting single-phase meter: The number in the word box is the degree of the meter, and the last digit of the number box is the red box, which indicates the decimal number.

Three-phase meter: The three-phase meter is connected by a current transformer connection.

There are 10 wires connected to the meter, and the current ratio of the connected current transformer should be observed.

The nameplate of the current transformer has the current ratio, which is marked with a number ratio of 5, such as 5, etc.

The number read on the meter multiplied by the current ratio is the amount of electricity measured, and the accurate loss and line loss should be added first, the household meter should be checked before leaving the factory, and a certain number should be taken, after the decimal point, the red character is less than 1 degree, the decimal front refers to the 1 digit after the calendar point is 0 1 degree, 2 digits are 0 2 degrees, the black character before the decimal point is greater than degrees, that is, degrees, and 2 digits are degrees.

The meter is used to measure the power consumption over a period of time, when reading the meter, you need to check this part of the meter: the part marked in the box is the reading position of the meter, the readings before and after are: thousands, hundreds, tens, the red part is the value after the decimal point, usually not calculated when reading the meter, because the meter reading device is a cumulative counter, so the value you see now is all the power consumption of the meter from the activation to the present.

So the way to know how much electricity is used over a period of time is to subtract the reading from the last time you looked at the meter from this reading, i.e.: w n2 n

W: Indicates the actual electricity consumption reading (unit: kWh1 kWh or "kWh");

n2: indicates the reading of the watch this time;

ni: indicates the last reading of the watch;