On-site quantity transmission device for electric energy meter
A technology of transmission device and electric energy meter, which is applied in the direction of measuring device, measuring electrical variable, instrument, etc., can solve the problems that the portable calibrator cannot be guaranteed to be accurate, impossible to check, and has large accuracy error, and achieves good application prospects and stability. High performance and reliability
Active Publication Date: 2014-06-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology
Usually, the laboratory test can obtain the specified accuracy index, while the error of the accuracy of the on-site test is generally relatively large, and it may be difficult to determine under some conditions; the laboratory test will simulate various situations according to the test regulations, such as Different loads, in a short period of time, conduct a comprehensive inspection of the characteristics of the inspected instrument, and make a qualified or unqualified judgment based on this; but on-site verification, there is only one working condition, and it is impossible to conduct a comprehensive inspection
[0004] In view of the large difference between the on-site test environment and the laboratory for on-site verification, and the electric energy meter must work under the field conditions, the portable calibrator passed through the laboratory value cannot guarantee the same accuracy in the field, and the work of the electric energy meter in the field To what extent is the ability accurate? It has become an important issue that has been widely concerned.
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[0022] The present invention will be further explained below in conjunction with the accompanying drawings of the specification. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0023] Such as figure 1 As shown, the on-site measurement value transmission device of the electric energy meter of the present invention has high precision, high stability, high reliability, standardization, digitization, high stability, and high reliability, and specifically includes a sampling circuit, a variable gain amplifier circuit, and an AD conversion circuit. , A microprocessor and an industrial computer, the sampling circuit is connected to the three-phase voltage and current output terminals of the field electric energy meter, and the output terminal of the sampling circuit is connected to the microprocessor through the variable gain amplifier circuit ...
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The invention discloses an on-site quantity transmission device for an electric energy meter. The on-site quantity transmission device comprises a sampling circuit, a variable gain amplification circuit, an AD conversion circuit, a microprocessor and an industrial personal computer. The sampling circuit is externally connected with the three-phase voltage and the current output end of the on-site electric energy meter, and the output end of the sampling circuit is connected with the microprocessor through the variable gain amplification circuit and the AD conversion circuit. The on-site quantity transmission device for the electric energy meter can accurately reflect the work condition of the on-site electric energy meter, and is high in accuracy, stability and reliability and good in application prospect.
Description
Technical field [0001] The invention relates to a field value transmission device of an electric energy meter, belonging to the technical field of digital electric energy measurement. Background technique [0002] In the international recommendations and verification procedures for electric energy meters, it is stipulated that the verification of electric energy meters should be carried out under laboratory conditions. The verification under laboratory conditions refers to the use of equipment set in a prescribed laboratory environment and in accordance with the provisions of the verification regulations. , Perform item-by-item tests on the inspected meter, and judge whether it is qualified or unqualified based on the test results. On-site verification generally refers to bringing the standard meter to the site and inserting the standard meter into the power grid close to the meter to be inspected. The electric energy readings of the test meter and the standard meter in the same ...
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IPC IPC(8): G01R35/04
Inventor 杨世海卢树峰赵双双徐敏锐陈铭明吴桥纪峰
Owner STATE GRID CORP OF CHINA