Every family, agency, and business when using electricity must have an electricity meter to determine monthly electricity consumption. Wherever there is electricity, there are electric meters. So What is an electric meter?? Uses of electric meters, structure, Working principle of electric meter How is it determined? The content of the article below, we will help you answer the above questions.
Viewing: What is an electric meter
What is an electric meter?
Electric meter Also known as electricity meter, galvanometer is a device used to measure the amount of electricity consumed by electrical equipment, electrical systems, etc. In Vietnam, electricity meters are taken by Vietnamese electricity companies as basis for monthly electricity bill payment.
Uses of electric meters
Electricity meter accurately shows the power consumption of electrical equipment; Helps electricity users monitor and control current consumption; Stabilizes alternating current;
Maybe you don’t know the use of the commonly used power saving device today
Classification of current electric meters
We did an overview What is an electric meter?, but surely many people are still confused about how to classify electricity meters. Currently, electricity meters are classified into two types: single-phase electric meters and three-phase electric meters. In addition, there is a 2-way electric meter.
1 phase electric meter
Construction of 1 phase electric meter
A single-phase electric meter is composed of the following basic parts:
Voltage coil: is installed in parallel with the load and this coil has a large number of turns, the wire cross-section is smaller than other types of meters. The current coil is installed in series with the auxiliary. this. The number of turns of this coil is less than that of the voltage coil, but the wire cross-section is larger. The permanent magnet has the role of generating rolling torque when the aluminum belt part rotates in its magnetic field. The mechanical gearbox has a duty. displays the number of revolutions of the aluminum disc when it is attached to the axis of the aluminum disc.Classification of 1 phase electric meters
For single-phase electric meters, there are two types: mechanical single-phase electric meters and electronic single-phase electric meters.
Single-phase mechanical electric meter is the most common type of electric meter and almost always appears in households. This type of electricity meter (Electricity meter) is usually used for single-phase power grids. This type of grid is used in households using low-power electrical appliances.
Electric meter 1 phase mechanical
The indicators and advantages and disadvantages of a mechanical single-phase electric meter will give you a better overview of What is an electric meter?. Let’s find out together.
Indicators of 1 phase mechanical electric meter
220V: The electric meter has a rated voltage of 220V.5(20)A: the rated current of the electric meter is 5A. However, a power supply rated up to 20A can be used. If you use a power source exceeding 20A, the meter will not work correctly.900 rpm: the meter disc will get 1kWh when turning 900 revolutions. Màn chơi 2: when looking at the meter, we will see information. màn chơi 1 or màn chơi 2. This is the accuracy màn chơi of the electric meter. The higher the màn chơi, the less accurate the measurement.50Hz: this is the frequency of the grid used in Vietnam.
Advantages of mechanical single-phase electric meter
Single phase mechanical electric meter is supplied and installed by Vietnam Electricity Company. This meter is cheap, easy to install. Single-phase mechanical electric meter has a simpler structure than electronic single-phase electric meter. Single-phase mechanical electric meter has high durability.
Disadvantages of 1 phase mechanical electric meter
Because it works on mechanical structures and principles. The most common disadvantage of a single-phase mechanical meter is its low accuracyElectronic single phase electric meter
This is a new type of electric meter, more modern and more accurate than an electromechanical meter. Electronic meter displays the value of power consumption on LCD or LED screen.
In addition to measuring power consumption, electronic meters can measure instantaneous electricity usage, maximum power, voltage levels, etc. Electronic meters can also measure power consumption of devices. equipment during peak or off-peak hours.
Let’s learn the advantages and disadvantages of single phase electric meters to know more about What is an electric meter? Please.
Advantages of single phase electronic electric meter
Electronic single phase electric meterElectronic 1-phase electric meter helps users to measure many related parameters. Helps monitor power quality. Single-phase electronic electric meter has the ability to warn of electric leakage. Accurate measurement of electricity consumption capacity.
Disadvantages of electronic single-phase electric meter
Single-phase electronic electric meters have a relatively high cost. The repair process is more complicated and difficult.
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3 phase electric meter
Knowing more knowledge about 3-phase electricity meters will help you better understand what an electric meter is. This type of meter is often used in 3-phase power networks such as in industrial parks and factories with large capacity electrical equipment.
3-phase electric meters are classified into many types: mechanical 3-phase electric meters, electronic 3-phase electric meters, etc. Or according to the way of measurement, 3-phase electric meters are divided into direct and indirect 3-phase electric meters. next.
For 3-phase mechanical and 3-phase electric meters, it is similar to electric 1-phase mechanical and 1-phase electric meters. In the following, we will learn about direct and indirect 3-phase electric meters.
Direct 3-phase electric meter
Direct 3-phase electric meter is the most common type of electric meter today. Direct 3-phase electric meters have the same reading of electrical values as a single-phase household electric meter.
Indirect 3-phase electric meter
Indirect 3-phase electricity meters have different installation and wiring methods. The 3-phase power meter is used for large capacity loads. How to read indirect 3-phase electric meters is different from direct 3-phase and 1-phase electricity meters.
In addition, we can also convert 3-phase current into 1-phase power for your purposes.
What is a 2-way electric meter?
A 2-way electric meter is an electric meter with two memories. 2-way electricity meters are often used to measure power from solar power projects. 2-way electric meter is used to measure 2-way power source.
2-way power metering:
Memory 1: is used to store the power consumption indicators provided by the Vietnamese electricity company. Memory 2: stores the electricity indicators from the installed solar grid system.
How to choose the best electric meter?
Selection of electric meters should be based on the technical parameters of the electric meters. There will be some parameters that are mandatory to follow and some that are allowed to be selected.
Specifications of What is an electric meter?? Let’s find out right here.
Voltage: this is a mandatory value to comply with – in Vietnam this value will be 220V. Current: it is necessary to pay attention to the rated current and the maximum current of the electric meter. The maximum current is required or the meter will be damaged. The rated current ensures the accuracy of the electric meter. Common values are: 5(20)A, 10(40)A, 20(80)A.Frequency: the rated frequency of the electric meter that is required to comply, usually 50Hz.Rev/kWh: represents the number of revolutions of the aluminum disc to reach 1kWh. Normal will be 225 rev/kWh, 450 rev/kWh, 900 rev/kWh. Accuracy grade Cl: the usual accuracy class of electric meter will be Cl1, Cl2.
In the above parameters, voltage and frequency are two factors that must be complied with. Two parameters that affect the accuracy of electric meters are accuracy class and current. The exact màn chơi is due to the device itself we cannot change. Thus, the main factor that determines the accuracy of an electric meter is the current of the electric meter.
The principle to choose the right electric meter is based on the current. The suitable load current ranges from 50% of the rated current to 75% of the maximum current.
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Through this post yt2byt.edu.vn helped you understand What is an electric meter?? There are many types of electric meters, their uses and how to choose them. Regarding the issue of energy-saving devices, we have shared about how to slow down the electric meter in the previous article. Hope you will apply these tips for your home electricity meter.
See how people often use to reduce electricity costs every month HERE
Note: If you are a non-electrical person. Please consult an electrical engineer for safety!
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