How to divide the verification cycle of the electric energy meter

Zhiyan Data Research Center Network News: Abstract: Electric energy meter and electricity information collection system products involve a variety of technologies, with the change of user needs, application models and policy measures, continuous innovation is required, and the frequency of product updates is gradually accelerated. 1. The industry is highly competitive.

Before 2009, the electrical equipment was tendered by the local power grid companies, which made the number of electric energy meter and electricity information collection system product manufacturers larger, the scale was smaller, and the regional characteristics were more obvious, which restricted the development of China's electric energy meter industry to a certain extent. With the implementation of centralized large-scale bidding and procurement of electric energy meter products by the State Grid, and the development of high-level and benign competition in technology, brand, and product added value, the industry competition is becoming increasingly fierce, and the development of China's electric energy meter industry will face greater competition.

2. There is a shortage of senior compound talents.

Electric energy meter and electricity information collection system products involve a variety of technologies, with the change of user needs, application modes and policy measures, requiring continuous innovation, product update frequency gradually accelerated. From product research and development, enterprise production management, sales management, service management, information management and many other aspects, the demand for senior compound talents has been increased. At present, there is a shortage of senior compound talents in China, the strength of the company specializing in basic, forward-looking, strategic and major special research on the development of the industry is weak, and the stability and reliability of high-end products are still far behind foreign products, which restricts the further development of the industry.

Hello, according to the technical management regulations for electric energy metering devices (DL T 448-2000) on-site inspection:

The first on-site inspection shall be carried out within one month after the newly put into operation or renovated Class I, Class I and Class High Voltage Energy Metering Devices.

Class I energy meters should be inspected on site at least once every 3 months;

On-site inspection of such energy meters at least once every 6 months;

On-site inspection of such energy meters shall be carried out at least once a year.

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.

Class: 6 months;

Class: 12 months;

Class: 24 months.

The verification cycle of the watt-hour meter of various electric energy metering devices is as follows.

1. Class electric energy metering device.

High-voltage billing users with an average monthly electricity consumption of 5 million kWh or more or a transformer capacity of 10,000 kW or more, generators of 200MW and above, on-grid electricity of power generation enterprises, electricity exchange points between power grid operators, and power supply gateway metering points between provincial power grid operators and their power supply enterprises.

2. Class electric energy metering device.

The electric energy metering device of the electricity exchange point between the high-voltage billing users with an average monthly electricity consumption of 1 million kWh or more or the transformer capacity of 2000 kW or more, generators of 100 MW and above, and power supply enterprises.

3. Class electric energy metering device.

Billed users with an average monthly electricity consumption of 100,000 kWh or more or a transformer capacity of 315kW or more, generators below 100MW, power consumption of power generation enterprises (stations), metering points used for contracting assessment within power supply enterprises, and transmission line energy metering devices of 110kV and above for the assessment of active power balance.

4. Class electric energy metering device.

Charging users with a load capacity of less than 315kva, electric energy metering devices for internal economic and technical index analysis and assessment of power generation and power supply enterprises.

5. Class electric energy metering device.

Single-phase power supply of electricity users billing energy metering device。

Summary. Hello dear. <>

<> am honored to answer for you, thank you for your patience and wait, for you to inquire: the provisions of the verification cycle of the electric energy meter verification cycle description of the verification cycle of the electric energy meter The verification (rotation) cycle of the separated and integral time-sharing electric energy meter shall comply with the provisions of Article 20 of JJG307-1988; Proofread at least once a year for the pitching error of the period. The civil energy meter is only verified for the first time, and the validity period is generally 6 years, and it will be rotated at the expiration date.

The first inspection is carried out when the single-camera electric AC electric energy meter is installed, and it is rotated after 5 years, and the verification procedure is JJG307-2006. The first inspection is carried out for the verification of electronic electric energy meters, and the verification period is 5 years. Verification Procedure JJG596-1999 For details, please refer to:

On August 6, 1991, the State Bureau of Technical Supervision promulgated the relevant provisions on the implementation of the verification of compulsory verification of work measuring instruments (for trial implementation).

National standard for the verification cycle of electricity meters.

Hello dear. <>

Fresh round early flower] I am honored to answer for you, I thank you for your patience and waiting, for you to inquire: the provisions of the verification cycle of the electric energy meter description of the verification cycle of the electric energy meter The verification cycle of the separated and integral time-sharing electric energy meter shall comply with the provisions of Article 20 of JJG307-1988; Proofread at least once a year for the pitching error of the period. The civil energy meter is only verified for the first time, and the validity period is generally 6 years, and it will be rotated at the expiration date.

The first inspection is carried out when the single-camera electric AC electric energy meter is installed, and it is rotated after 5 years, and the verification procedure is JJG307-2006. The first inspection is carried out for the verification of electronic electric energy meters, and the verification period is 5 years. Verification Procedure JJG596-1999 For details, please refer to:

On August 6, 1991, the State Bureau of Technical Supervision promulgated the relevant provisions on the implementation of the verification of compulsory verification of work measuring instruments (for trial implementation).

Hello dear.

According to Article 79 of the "Power Supply Business Rules", the car shed of the power supply enterprise must verify and rotate the billing energy meter according to the prescribed cycle, and conduct irregular inspections on the charging energy meter. The rotation cycle of the metering device is as follows: (1) According to the provisions of Article 1 of the JJG 596-2012 Electronic Energy Meter Verification Regulations, the level is

The 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.

Verification cycle The verification (rotation) cycle of separate and integral time-sharing electric energy meters shall comply with the provisions of Article 20 of JJG307-1988; Proofread at least once a year for the pitching error of the period.

The first inspection is carried out when the single-camera electric AC electric energy meter is installed, and it is rotated after 5 years, and the verification procedure is JJG307-2006.

The first inspection is carried out for the verification of electronic electric energy meters, and the verification period is 5 years. Verification Procedure JJG596-1999

For details, please refer to: On August 6, 1991, the State Bureau of Technical Supervision promulgated the relevant provisions on the implementation of the verification of work measuring instruments for compulsory verification (for trial implementation).

The civil energy meter is only verified for the first time, and the validity period is generally 6 years, and it will be rotated at the expiration date.

Generally one year, the specific provisions by the manufacturer or the measurement department, not more than the scope of the above provisions, can also be decided according to the use of their own. The verification cycle is generally given by the institutions responsible for verification, such as various measurement institutes, metrologists, etc

Start: Single-phase standard electric energy meter and installed electric energy meter, under the condition that the reference voltage, reference frequency and power factor are 1, after the load current rises to the specified value of table 8, the standard electric energy meter should start continuous cumulative counting, and the installed electric energy should have pulse output or the indicator light representing the output of the electric meter flashes.

Latent movement: voltage loop plus reference voltage (symmetrical three-phase reference voltage for three-phase electric energy meter), when there is no current in the current circuit, the output of the installed electric energy meter shall not be more than 1 pulse within 10 times the time of 1 pulse generated under the starting current.

What is the meaning?

where c is the pulse constant in imp kwh; m is 1; u is the reference voltage in v; IQ is the starting current in A. )

Theoretically, don't change it, it's still easy to use, it will be cleared, and it will be counted from scratch.

1. Basic error: should meet the grade, acceptance error limit: under the specified reference conditions, to meet the requirements of the technical regulations, our bureau according to the verification regulations specified error limit of 50 acceptance.

Error limit in operation: meet the requirements of technical regulations under the specified reference conditions.

2. Error change limit caused by other influence quantities: The additional percentage error change caused by the change of the influence quantity relative to the reference conditions given by the procedure should not exceed the limit specified in the regulation.

3. Influence of ambient temperature: the average temperature coefficient should not exceed the limit specified in the regulations.

4. Time-sharing function: three rates, which can display the time-sharing power and total power of the specified time period in the bucket opening period, and the daily timing error is "seconds and days."

5. Meter reading: Infrared programming meter reading of the slag cavity can be carried out, and the communication protocol is implemented according to DL T 645 1997.

6. Output port: It has a standard pulse output and a light-emitting diode output for testing and corresponding to the electric energy value.

7. Meter error guarantee period: under normal working conditions, the average service life of electric energy meters such as pins is at least 10 years.

8. Battery: Cylindrical battery with a service life of at least 10 years.