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Electric energy meter and self-calibration method for self-calibration of electric energy

A self-calibration technology for electric energy meters, which is applied in the field of meter calibration, can solve the problems that electric energy meters cannot be calibrated on site, and achieve the effects of reducing transportation and maintenance costs, improving calibration efficiency, and preventing time consumption

Active Publication Date: 2019-04-12
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an electric energy meter and a self-verification method that realizes the self-verification of the electric energy meter and solves the problem that the electric energy meter cannot be verified on-site

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  • Electric energy meter and self-calibration method for self-calibration of electric energy

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] See figure 1 , an electric energy self-checking electric energy meter, including a metering chip and a current transformer arranged inside the electric energy meter and a verification button arranged on the electric energy meter casing, one side of the electric energy transformer is provided with a first coil A and the second coil B, the other side of the current transformer is provided with a third coil C, the first coil A is connected to the grid for inputting the user load current I1, and the metering chip is connected to the current transformer through a sampling circuit The third coil C on the other side of the transformer, and the metering chip is also connected to the second coil B on one side of the current transformer for inputting the reference current I3.

[0016] In this embodiment, a method for self-verification of an elect...

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Abstract

The invention discloses a self-checking electric energy meter and a self-checking method. A metering chip arranged in the electric energy meter is used to output reference current. The measurement data of the reference current and standard data without the reference current are recorded. The measurement data and the standard data are compared to calculate the measurement value of a current loop. The measurement value is compared with the accuracy value of corresponding equipment to determine a checkout result. The electric energy meter can carry out checking without disassembly. The cost is reduced. Time consumption is prevented. The checking efficiency is improved.

Description

technical field [0001] The invention relates to the field of instrument calibration, in particular to an electric energy meter for self-calibration of electric energy and a self-calibration method. Background technique [0002] As a kind of electric energy meter, the accuracy of the electric energy meter must meet the relevant national standards within its life cycle. Therefore, the electric energy meter department should regularly calibrate the electric energy meter in use to check its actual accuracy and other related parameters; But at present, the calibration of the electric energy meter needs to dismantle the electric energy meter, connect it with a standard electrical signal in the factory or in the laboratory, and confirm by comparing the apparent value error between the electric energy measured by the meter and the standard electric energy meter. The measurement accuracy of the meter; after the calibration is completed, the meter will be installed back, resulting in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 杜小涛何昂胡志刚程雪利
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD