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Device, method and system for testing residual current monitoring alarm function of electric energy meter

A technology of residual current and testing equipment, which is applied in the direction of measuring equipment, measuring electrical variables, instruments, etc., can solve problems such as the inability to test the residual current monitoring and alarm function of electric energy meters, and achieve the goal of reducing test power requirements and test costs, and reducing safety risks Effect

Active Publication Date: 2020-12-18
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a test device, method and system for the residual current monitoring and alarm function of the electric energy meter, which is used to solve the problem that the existing test device for monitoring the residual current of the smart electric energy meter cannot test the residual current monitoring and alarm function of the electric energy meter technical issues

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  • Device, method and system for testing residual current monitoring alarm function of electric energy meter
  • Device, method and system for testing residual current monitoring alarm function of electric energy meter
  • Device, method and system for testing residual current monitoring alarm function of electric energy meter

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Embodiment 1

[0045] figure 1 It is a schematic circuit diagram of the test device for the residual current monitoring and alarm function of the electric energy meter described in the embodiment of the present invention.

[0046] Such as figure 1 As shown, the embodiment of the present invention provides a test device for the residual current monitoring and alarm function of an electric energy meter, including an electric energy meter under test, a programmable power load 10, a current detection module 20, a current regulation module 30 and an isolation transformer 40;

[0047] Programmable power load 10, used to provide load current for the electric energy meter under test;

[0048] The current detection module 20 is used to detect the actual residual current of the electric energy meter under test;

[0049] The current regulation module 30 is used to provide a quantitative analog residual current for the electric energy meter under test;

[0050] The isolation transformer 40 is used to...

Embodiment 2

[0072] Figure 4 It is a flowchart of the steps of the test method for the residual current monitoring and alarm function of the electric energy meter described in the embodiment of the present invention.

[0073] Such as Figure 4 As shown, the embodiment of the present invention also provides a test method for the residual current monitoring and alarm function of the electric energy meter, including the test device for the above-mentioned residual current monitoring and alarm function of the electric energy meter, which is a test device, and the test device is connected to the electric energy meter under test. The method for testing the residual current monitoring and alarm function of the electric energy meter comprises the following steps:

[0074] S1. Set the residual current setting value on the tested electric energy meter according to the residual current monitoring function of the tested electric energy meter; detect the residual current actual value corresponding to...

Embodiment 3

[0089] The embodiment of the present invention also provides a test system for the residual current monitoring and alarm function of the electric energy meter, which includes the above-mentioned test device for the residual current monitoring and alarm function of the electric energy meter, which is a test device, and the test device is connected with the electric energy meter under test. The test system for the residual current monitoring and alarm function includes a first test module, a second test module, a third test module, a fourth test module and a judgment module;

[0090] The first test module is used to set the residual current setting value on the electric energy meter under test according to the residual current monitoring function of the electric energy meter under test; detect the actual residual current value corresponding to the residual current monitoring function on the electric energy meter under test through the test device, If the set value of residual cur...

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Abstract

The embodiment of the invention relates to a device, method and system for testing a residual current monitoring alarm function of an electric energy meter. Whether the residual current monitoring andalarming functions of the tested electric energy meter are normally started or not can be detected, the residual current monitoring accuracy of the tested electric energy meter can be quantitativelyand accurately tested, whether the tested electric energy meter can normally set a threshold value or not can be detected, and it can be verified that misoperation does not occur within the set threshold value range and reliable action can be achieved; and the normal operation of residual current monitoring and alarm functions of the measured electric energy meter is ensured. According to the invention, a program-controlled power load of a small-power virtual load is adopted to replace a large-power real load testing device and method, the requirement for a testing power source and the testingcost are reduced, the safety risk in the testing process is reduced, the testing efficiency is improved, and the device is used for solving the technical problem that an existing testing device for monitoring the residual current of the intelligent electric energy meter cannot test the residual current monitoring alarm function of the electric energy meter.

Description

technical field [0001] The invention relates to the technical field of electric energy meter detection, in particular to a testing device, method and system for the residual current monitoring and alarm function of electric energy meters. Background technique [0002] In recent years, with the rapid development of smart energy meter technology, smart energy meters have more and more functions, among which the residual current monitoring function is an important new function of single-phase smart energy meters. In the technical specifications of the single-phase smart energy meter, the energy meter is required to have a residual current monitoring function. Within the specified temperature and humidity range, the following accuracy and function requirements should be met: 1. When 10mA≤IΔ≤300mA, the measured residual current The deviation is not greater than 3mA; 2. When IΔ> 300mA, the measured residual current should be greater than or equal to 297mA; 3. The smart energy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 胡珊珊肖勇钱斌罗奕王典浪
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD