An automatic short-circuit fault meter detection device for electricity meters

Abstract

This utility model discloses an automatic short-circuiting device for energy meters, comprising a connecting frame, an energy meter under test, a data acquisition unit, a control unit, and an automatic short-circuiting unit. The automatic short-circuiting unit includes a current input terminal, a current output terminal, a meter position current input terminal, a meter position current output terminal, and a relay. The energy meter under test can be connected to a meter position, and the meter positions are connected in series to achieve simultaneous testing of multiple energy meters. During the testing process, the data acquisition unit detects the current direction and magnitude of each meter position. If an abnormality is found, the control unit controls the relay of the corresponding meter position to activate, short-circuiting the meter position. Other meter positions can still ensure normal testing of the energy meter under test. There is no need for manual inspection of the meter positions one by one, shortening the operation time. At the same time, automatic short-circuiting can avoid the problems of incomplete short-circuiting and poor contact that occur with manual short-circuiting, and can also prevent workers from touching live terminals, reducing the probability of electric shock accidents.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter testing technology, and in particular to an electricity meter testing device that automatically short-circuits faulty meters. Background Technology

[0002] With the development of the power industry, the use of standard energy meters and field calibration instruments has increased significantly. Traditional single-meter testing is inefficient and can no longer meet the needs of large-scale production and quality inspection. Multi-meter testing has emerged to address this issue. Multi-meter testing can test multiple meters simultaneously, greatly shortening the testing time and improving testing efficiency. At the same time, all meters are tested under the same conditions, avoiding inconsistencies in test results caused by differences in testing environment and equipment, thus improving the reliability and comparability of test results.

[0003] While multi-tablet testing brings convenience and efficiency, the large number of tables being tested simultaneously makes it difficult to quickly and accurately determine the cause of any abnormalities. In current multi-tablet testing methods, when an abnormality occurs, staff need to check each table in turn to identify the abnormal table and the cause of the abnormality. This also requires manual short-circuiting of the tables, which not only increases the workload but also interrupts the testing process and reduces efficiency. Furthermore, manual short-circuiting may lead to inaccurate test results due to improper operation or time delays. Utility Model Content

[0004] In view of this, the present invention proposes an energy meter detection device that automatically short-circuits abnormal meters, which can quickly identify the abnormal meter position or the meter under test and automatically short-circuit it to ensure that the detection of the remaining meter positions can continue.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An automatic short-circuit faulty energy meter detection device includes a connecting frame, an energy meter under test, a data acquisition unit, a control unit, and an automatic short-circuit unit. The connecting frame has an input area and an output area at both ends, with several meter positions positioned between the input and output areas. The energy meter under test is installed at each meter position. The data acquisition unit is used to acquire the magnitude and direction of the current transmitted to the energy meter under test. The automatic short-circuit unit includes a current input terminal, a current output terminal, a meter position current input terminal, a meter position current output terminal, and a relay. The current input terminal is located in the input area, the current output terminal is located in the output area, and the meter position current input terminal and meter position... The current output terminal is located on the meter position. The current input terminal is electrically connected to the meter position current input terminal of the adjacent meter position. The meter position current output terminal is electrically connected to the meter position current output terminal of the adjacent meter position. The current output terminal is electrically connected to the meter position current output terminal of the adjacent meter position. The relay is located on the connection path between the current input terminal and the meter position current input terminal, the meter position current output terminal and the meter position current input terminal, and the meter position current output terminal and the current output terminal. The energy meter under test is electrically connected to the meter position current input terminal and the meter position current output terminal on the meter position through wires. The control unit is electrically connected to the data acquisition unit and the relay respectively.

[0007] Preferably, the energy meter under test includes a meter input terminal and a meter output terminal. The meter input terminal is electrically connected to the meter position current input terminal via a wire, and the meter output terminal is electrically connected to the meter position output terminal via a wire.

[0008] Preferably, the energy meter being tested is a three-phase energy meter, and the number of the current input terminal, current output terminal, meter position current input terminal, meter position current output terminal, meter input terminal, and meter output terminal are all three, with the meter position current input terminal located above the meter position current output terminal.

[0009] Preferably, the data acquisition unit includes a Hall effect sensor and a current transformer.

[0010] Preferably, the relay is located on the side of the connector frame away from the meter position.

[0011] Preferably, it also includes a power source, which forms a loop with the current input terminal and the current output terminal, and the control unit is electrically connected to the power source.

[0012] Preferably, the energy meter under test further includes a meter voltage terminal, which is electrically connected to the power source.

[0013] Preferably, it also includes a standard electricity meter, and the power source is connected to the standard electricity meter to form a circuit.

[0014] Preferably, the control unit is a PLC controller.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In an energy meter testing device for automatically short-circuiting faulty meters according to the present invention, several meter positions are set on a connecting frame. The meter position current input terminal and meter position current output terminal on the meter position can be electrically connected to the energy meter under test, and the meter position current output terminal is electrically connected to the meter position current input terminal of the adjacent meter position. Therefore, series connection between meter positions can be realized, so that multiple energy meters under test can be tested simultaneously. During the testing process, the current direction and magnitude are collected by the data acquisition unit. When an abnormality occurs, the control unit can automatically short-circuit the faulty meter position through a relay to ensure that the testing of the remaining meter positions can be carried out normally, thereby improving the efficiency of energy meter testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an energy meter detection device for automatically short-circuiting faulty meters according to the present invention.

[0019] Figure 2 This is an electrical connection diagram of an energy meter detection device for automatically short-circuiting fault meters according to the present invention;

[0020] Figure 3 This is a schematic diagram of the meter position during normal testing of an automatic short-circuit fault meter detection device according to the present invention.

[0021] Figure 4 This is a schematic diagram of an energy meter detection device for automatically short-circuiting faulty meters according to the present invention when the meter position is short-circuited.

[0022] Figure 5 This is a schematic diagram of the connection frame of an energy meter detection device for automatically short-circuiting faulty meters according to the present invention;

[0023] Figure 6 This is a schematic diagram of the connection structure between the relay and the connecting frame of an automatic short-circuit fault meter detection device according to the present invention.

[0024] Figure 7 This is a circuit diagram of a PLC-controlled relay for an energy meter detection device that automatically short-circuits faulty meters, according to the present invention.

[0025] In the diagram, 1. Connecting frame; 2. Energy meter under test; 3. Data acquisition unit; 4. Control unit; 5. Input area; 6. Output area; 7. Meter position; 8. Current input terminal; 9. Current output terminal; 10. Meter position current input terminal; 11. Meter position current output terminal; 12. Relay; 13. Meter input terminal; 14. Meter output terminal; 15. Power source; 16. Meter voltage terminal; 17. Standard energy meter. Detailed Implementation

[0026] To better understand the technical content of this utility model, a specific embodiment is provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0027] See Figures 1 to 7 This utility model provides an automatic short-circuit fault meter detection device, comprising a connecting frame 1, a tested energy meter 2, a data acquisition unit 3, a control unit 4, and an automatic short-circuit unit. The connecting frame 1 has an input area 5 and an output area 6 at both ends, with several meter positions 7 between the input area 5 and the output area 6. The tested energy meter 2 is installed at a meter position 7. The data acquisition unit 3 is used to acquire the magnitude and direction of the current transmitted to the tested energy meter 2. The automatic short-circuit unit includes a current input terminal 8, a current output terminal 9, a meter position current input terminal 10, a meter position current output terminal 11, and a relay 12. The current input terminal 8 is located in the input area 5, the current output terminal 9 is located in the output area 6, and the meter position current input terminal 10 and meter position current output terminal 11 are connected. The current output terminal 11 is disposed on the meter position 7. The current input terminal 8 is electrically connected to the meter position current input terminal 10 of the adjacent meter position 7. The meter position current output terminal 11 is electrically connected to the meter position current output terminal 11 of the adjacent meter position 7. The current output terminal 9 is electrically connected to the meter position current output terminal 11 of the adjacent meter position 7. The relay 12 is disposed on the connection path between the current input terminal 8 and the meter position current input terminal 10, the meter position current output terminal 11 and the meter position current input terminal 10, and the meter position current output terminal 11 and the current output terminal 9. The measured energy meter 2 is electrically connected to the meter position current input terminal 10 and the meter position current output terminal 11 on the meter position 7 through wires. The control unit 4 is electrically connected to the data acquisition unit 3 and the relay 12 respectively.

[0028] The connecting frame 1 is provided with several meter positions 7. Each meter position 7 is provided with a meter position current input terminal 10 and a meter position current output terminal 11. The meter position current output terminal 11 on the meter position 7 is electrically connected to the meter position current input terminal 10 of the adjacent meter position 7. Each meter position 7 can be connected to one energy meter 2 under test. The energy meter 2 under test will be electrically connected to the meter position current input terminal 10 and the meter position current output terminal 11 on the meter position 7. That is, the current can be input from the meter position current input terminal 10 to the energy meter 2 under test, and then sent from the meter position current output terminal 11 to the meter position current input terminal 10 of the next meter position 7, realizing the series connection on the meter positions 7. The two sides of all meter positions 7 are the input area 5 and the output area 6. The current input terminal 8 of the input area 5 is used to input current, and the current output terminal 9 of the output area 6 is used to output current, so that multiple energy meters 2 under test can be detected simultaneously.

[0029] In the entire series connection circuit, several relays 12 are set up. The relays 12 are set on the transmission path from the current input to the current input terminal 10 of the meter position. During the detection process, the data acquisition unit 3 can collect the direction and magnitude of the current transmitted to the tested energy meter 2. When a certain meter position 7 or the tested energy meter 2 malfunctions during the detection process, the control unit 4 can drive the relay 12 to short-circuit the corresponding meter position 7, while the other meter positions 7 can still be detected normally, ensuring that the energy meter detection can be carried out normally, shortening the operation time, avoiding problems such as incomplete short-circuiting and poor contact that occur during traditional manual short-circuiting, ensuring the accuracy of the detection results. At the same time, during the detection process, the staff does not need to touch the live terminals, reducing the probability of accidents.

[0030] Preferably, the measured energy meter 2 includes a meter input terminal 13 and a meter output terminal 14. The meter input terminal 13 is electrically connected to the meter position current input terminal 10 via a wire, and the meter output terminal 14 is electrically connected to the meter position 7 output terminal via a wire.

[0031] The current input terminal 10 of the meter position can be connected to the input terminal 13 of the meter through a wire, and the output terminal 14 of the meter can also be electrically connected to the current output terminal 11 of the meter position through a wire, so that the energy meter 2 to be measured is connected to the meter position 7 and the meter positions 7 are connected in series.

[0032] Preferably, the measured energy meter 2 is a three-phase energy meter, and the number of the current input terminal 8, current output terminal 9, meter position current input terminal 10, meter position current output terminal 11, meter input terminal 13 and meter output terminal 14 are all 3, and the meter position current input terminal 10 is located above the meter position current output terminal 11.

[0033] The three upper terminals of the meter 7 are all meter current input terminals 10, and the three lower terminals are all meter current output terminals 11, which can be conveniently connected to the energy meter 2 being measured.

[0034] Preferably, the data acquisition unit 3 includes a Hall effect sensor and a current transformer.

[0035] Hall effect sensors and current transformers can accurately measure the direction and magnitude of current to help determine if there are any abnormalities.

[0036] Preferably, the relay 12 is located on the side of the connecting frame 1 away from the meter position 7.

[0037] Relay 12 can switch connections under the action of control unit 4, thereby short-circuiting meter position 7 and ensuring normal detection of the measured energy meter 2 on other meter positions 7.

[0038] Preferably, it also includes a power source 15, which forms a circuit with the current input terminal 8 and the current output terminal 9. The control unit 4 is electrically connected to the power source 15. The measured energy meter 2 also includes a meter voltage terminal 16, which is electrically connected to the power source 15.

[0039] The power source 15 is used to provide voltage and current input to the energy meter 2 under test for testing purposes.

[0040] Preferably, it also includes a standard energy meter 17, and the power source 15 is connected to the standard energy meter 17 to form a circuit.

[0041] The standard energy meter 17 and the energy meter under test 2 are in the same environment, which can serve as a standard reference. By comparing the parameters of the standard energy meter 17 and the energy meter under test 2, it can be determined whether there is any abnormality in the energy meter under test 2.

[0042] Preferably, the control unit 4 is a PLC controller.

[0043] The PLC controller can control relay 12 by transmitting signals through pins, thereby shorting the meter position 7.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power meter detection device that automatically short-circuits faulty meters, characterized in that, The system includes a connecting frame, a measured energy meter, a data acquisition unit, a control unit, and an automatic short-circuit unit. The connecting frame has input and output areas at both ends, with several meter positions between the input and output areas. The measured energy meter is installed at each meter position. The data acquisition unit collects the magnitude and direction of the current transmitted to the measured energy meter. The automatic short-circuit unit includes a current input terminal, a current output terminal, a meter position current input terminal, a meter position current output terminal, and a relay. The current input terminal is located in the input area, the current output terminal is located in the output area, and the meter position current input and output terminals are located in... On the meter position, the current input terminal is electrically connected to the meter position current input terminal of the adjacent meter position, the meter position current output terminal is electrically connected to the meter position current output terminal of the adjacent meter position, and the current output terminal is electrically connected to the meter position current output terminal of the adjacent meter position. The relay is installed on the connection path between the current input terminal and the meter position current input terminal, the meter position current output terminal and the meter position current input terminal, and the meter position current output terminal and the current output terminal. The energy meter under test is electrically connected to the meter position current input terminal and the meter position current output terminal on the meter position through wires. The control unit is electrically connected to the data acquisition unit and the relay respectively.

2. The energy meter detection device for automatically short-circuiting faulty meters according to claim 1, characterized in that, The measured energy meter includes a meter input terminal and a meter output terminal. The meter input terminal is electrically connected to the meter position current input terminal via a wire, and the meter output terminal is electrically connected to the meter position output terminal via a wire.

3. The energy meter detection device for automatically short-circuiting faulty meters according to claim 1, characterized in that, The energy meter under test is a three-phase energy meter, and the number of the current input terminal, current output terminal, meter position current input terminal, meter position current output terminal, meter input terminal, and meter output terminal are all three. The meter position current input terminal is located above the meter position current output terminal.

4. The energy meter detection device for automatically short-circuiting faulty meters according to claim 1, characterized in that, The data acquisition unit includes a Hall effect sensor and a current transformer.

5. The energy meter detection device for automatically short-circuiting faulty meters according to claim 1, characterized in that, The relay is located on the side of the connector frame away from the meter position.

6. The energy meter detection device for automatically short-circuiting faulty meters according to claim 1, characterized in that, It also includes a power source, which forms a loop with the current input terminal and the current output terminal, and the control unit is electrically connected to the power source.

7. The energy meter detection device for automatically short-circuiting faulty meters according to claim 6, characterized in that, The energy meter under test also includes a meter voltage terminal, which is electrically connected to the power source.

8. The energy meter detection device for automatically short-circuiting faulty meters according to claim 6, characterized in that, It also includes a standard electricity meter, and the power source is connected to the standard electricity meter to form a circuit.

9. The energy meter detection device for automatically short-circuiting faulty meters according to claim 1, characterized in that, The control unit is a PLC controller.

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