How long does it take to replace a three phase four wire meter?

If you are a customer of Guangdong Power Grid Company, in order to ensure the accuracy of the meter, the power supply department will replace the energy meter regularly in accordance with the relevant national regulations, that is, the meter is rotated. According to the "Technical Management Regulations for Electric Energy Metering Devices (DL T 448-2016)", power supply enterprises will regularly conduct operation quality inspections on the operating meters to confirm whether the same batch of meters needs to be rotated. The power supply enterprise will divide the electric energy meters with the same manufacturer, model, order (production) batch and installation address into several batches for sampling inspection and judgment.

If it is judged to be a qualified batch, the batch meter can continue to run, and the operation quality inspection of the batch meter will be carried out after two years; If it is judged to be an unqualified batch, all the meters of the batch will be replaced.

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Regarding the service life of the electric energy meter, it is clearly stipulated in the "Verification Regulations for AC Electric Energy Meter (Watt-hour Meter)" JJG307 1988: "The single-phase electric energy meter (single gem) for measuring domestic electricity shall not exceed 5 years".

The selection and use of household energy meters and the common sense of measurement.

Electric energy meter, commonly known as watt-hour meter, electric meter, etc., is the metering interface between the electric energy consumer and the electric energy consumer, the user as the user of electric energy, in the process of using and selecting the electric energy meter, what things should be paid attention to?

1. Pay attention to the capacity of the electric energy meter (that is, the maximum allowable current of the electric energy meter), which is the key to meter selection. Generally, the household energy meter is marked with the words 2 (a) or 5 (a), which indicates that the maximum allowable current of the meter is 2 amps or 5 amps. At present, the vast majority of households are installed with 5A electric energy meters, which means that they can meet the needs of 1 kilowatt of electrical appliances for residents.

With the increasing number of household appliances, is it necessary to constantly replace large-capacity energy meters? No, because most of the current international energy meters have more than four times the overload capacity. Basically, it is guaranteed to be used.

However, long-term overload has a considerable negative impact on the standard and service life of the energy meter.

2. At present, the state stipulates that the service life of civil electric energy meters is 5 years, but it is difficult to meet this requirement due to financial resources and management reasons, so some of them end up with a meter. For users, when it is found that the metering cost of the electric energy meter suddenly increases or decreases, it is time to consider re-metering or updating the electric energy meter.

Summary. According to the national technical management regulations, (the rotation cycle of high-voltage metering three-phase meter is generally 3 4 years), the rotation cycle of low-voltage metering three-phase meter is 4 to 6 years, and the rotation cycle of low-voltage single-phase meter is 6 to 10 years, in order to ensure the measurement accuracy of the electric energy meter, according to the relevant national regulations, the electric energy meter should be replaced regularly, that is, the meter rotation.

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How long does it take to replace a three-phase four-wire meter?

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According to the national technical management regulations, (the rotation cycle of high-voltage metering three-phase meter is generally 3 4 years), the rotation cycle of low-voltage metering of Sanye chain phase meter is 4 to 6 years, and the rotation cycle of low-voltage single-phase meter is 6 to 10 years. We hope you find ours helpful.

According to the current policies and business rules, if you are a customer of Guangdong Power Grid Company, 1) according to the national regulations "JJG 596-2012 Electronic Energy Meter Verification Regulations", Article 1, GradeThe verification period of 5S level active energy meter is generally not more than 6 years; For grade 1 and grade 2 active energy meters, the verification period is generally not more than 8 years.

2) According to the article "JJG (Guangdong) 062-2021 Electronic AC Fibrillation Meter in Operation", the running electric energy meter (including the batch of electric energy meter) that is close to the verification cycle can be verified according to the verification results and according to JJF 1139 "Principles and Methods for Determining the Verification Cycle of Measuring Instruments", and if the verification is qualified, the verification interval that can be extended is generally not more than 50% of the verification period specified in the JJG596-2012 "Electronic AC Electric Energy Meter". And the cumulative operating time of the electric energy meter cannot exceed the design life; If the verification is unqualified, stop using it. For the deferred use of electric energy meters, their operating status should be continuously monitored through the electric energy meter ** Shansou status monitoring platform.

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According to Article 79 of the "Power Supply Business Rules", the rotation cycle of high-voltage metering three-phase meters is generally 3 4 years, the rotation cycle of low-voltage metering three-phase meters is 4 6 years, and the rotation cycle of low-voltage single-phase electric energy meters is 6 10 years.

Household electricity meters generally record the active energy consumed by household appliances, and the reactive energy is not recorded, and only active energy is consumed for heating wire heating elements such as ordinary light bulbs and electric stoves, and some inductive or capacitive loads (motors, televisions, air return tunes, fluorescent lamps, etc.), in addition to the consumption of active energy, there is also the consumption of reactive energy. That is to say, the apparent power of the inductive load is the vector addition of the dry starting power and the non-leakage blocking power, and the difference between them is 90 degrees"Degrees"The work, of course, is greater than the number of degrees of active energy recorded in the watt-hour meter.

Three-phase four-wire electricity is used on the incoming line, is the meter metered?

Hello, dear, 1, if there is no chaos in the parting, just connect the incoming and outgoing lines of the three-tan four-wire electric energy meter with the branch phase together, this situation is called bypassing the electric energy metering device electricity, which is a kind of typical illegal electricity consumption, also known as short meter electricity. In this case, there is no problem with electricity, but the meter does not go (or it is very slow). 2. If the incoming and outgoing lines of the three-phase four-wire electric energy meter are connected together, the difference is messy, that is, the A phase of the meter outgoing line returns to the B phase (or C phase, N phase) of the meter incoming line, and there will be a short circuit accident, which can not be carried out for a second, but it is only burned at the short circuit or the upper switch trips, due to the short time, the meter will not burn under normal circumstances.

3. From the incoming and outgoing lines, the electric energy meter is connected in series in the circuit, if it is not overloaded, lightning and other extreme situations, the hidden electric energy meter will not burn.

See if there is a transformer, if not, read it directly.

Some have to be obedient to the multiple of the transformer.

There is another kind. It's locked up in the electrical cabinet. You can see what the ** above represents.

Like etc. Jump every five to ten seconds.

A three-phase watt-hour meter is a watt-hour meter used to measure the power output (or load consumption) of the power supply in the three-phase alternating current Chiqingsheng circuit. It works exactly the same as a single-phase watt-hour meter, except that the structure adopts multiple sets of drive components and multiple aluminum discs fixed on the rotating shaft to realize the measurement of three-phase electric energy.

OK. The actual working principle of the three-phase three-wire meter and the three-phase four-wire system is the same, the three-phase three-wire meter omits the zero line, and the three wires connected are live wires, and the three-phase four-wire meter has a line connected to the zero line, which is often used in civil lighting circuits.

Three-phase four-wire meters are used for three-phase four-wire meters, mostly 380 220 low-voltage lines (a small number of high-voltage lines with special needs may also be used.) The low wire itself is a three-phase four-wire system, so you can only use a three-phase four-wire meter, such as using a three-phase three-wire system, which will cause undercounting. This has to do with the classification of circuits.

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A three-phase four-wire electronic meter is a type of electricity meter used to measure three-phase electrical energy. It can show the amount of electricity used through the display screen, usually in kilowatt hours. On the meter, you can see two numbers, one is the current electricity usage and the other is the total electricity usage.

Current electricity usage refers to the amount of electricity you are currently using, while total electricity usage is the total amount of electricity you have used since installing the meter. To check your current battery usage, you can press the "Display" button on the meter, and then the current electricity usage will be displayed on the screen. If you want to see the total battery usage, you can press the "Total Battery" button, and then the total battery usage will be displayed on the screen.

In addition to displaying electricity usage, the three-phase four-wire electronic meter can also display voltage, current, power factor and other information. This information can help you better understand your electricity usage and take appropriate steps to conserve it. 

The wiring diagram of the three-phase four-wire meter is as follows:

A yellow line, the voltage line is connected to the No. 2 port, the current line is connected to the No. 1 port input through the first current transformer S1, and the S2 is connected to the No. 3 port output.

B green line, the voltage line is connected to port 5, the current line is connected to port 4 input through the second current transformer S1, and S2 is connected to port 6 output.

C red line, the voltage line is connected to port 8, the current line is connected to port 7 input through the third current transformer S1, and S2 is connected to port 9 output.

n The black line generally represents the neutral line, which is directly connected to port 10.

The principle of wiring diagram of three-phase four-wire meter.

The working principle of the three-phase three-wire active energy meter is basically the same as the working principle of the single-phase active energy meter, and the three-phase active energy meter is generated by the current and voltage elements to move into the magnetic field, and at the same time interact with the braking torque, so that the speed obtained by the aluminum disc in the magnetic field is proportional to the active power of the load, so as to achieve the purpose of measuring electric energy.

When the three-phase four-wire active energy meter works, a moving magnetic field is generated by three groups of current and voltage elements, and the total torque acting on the aluminum disc is the sum of the torques of the three groups of components to produce a good shed, so that the speed obtained by the aluminum disc in the magnetic field is proportional to the active power of the load, so as to achieve the purpose of measuring electric energy.