A safe type electric energy meter live checking device

Abstract

This utility model relates to the field of electricity meter testing technology, specifically a safety-type live-line testing device for electricity meters. It includes a main body of the testing device and a terminal box adapted for installation thereon. Several sets of data acquisition contacts and communication contacts are arranged at the rear of the main body of the testing device. Each set of data acquisition contacts includes a single voltage acquisition contact and two current acquisition contacts, arranged vertically on the same side as the voltage acquisition contact. An insulating ceramic pin is provided at the outer end of the upper current acquisition contact. A detection and processing module is installed inside the main body of the testing device, electrically connecting each data acquisition contact and the communication contact. Data acquisition sockets and communication sockets adapted to each data acquisition contact of the main body of the testing device are provided at the front of the terminal box. This device enables live-line testing without the need for disconnecting, reconnecting, and reconnecting the circuit as in traditional methods; the testing device can be installed directly onto the terminal box for verification.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter testing technology, specifically a safety-type electricity meter liveness testing device. Background Technology

[0002] As a key metering instrument in electricity trade settlement, the accuracy of electricity meters directly affects fair transactions between electricity suppliers and consumers. To ensure meter accuracy, regular or irregular on-site calibration is required. Traditional on-site calibration methods typically require disconnecting the meter from its operating circuit (i.e., power outage) and connecting it to a standard calibration device for verification; the second method involves calibrating the meter without power interruption, but this requires using a screwdriver to perform on-site wiring work while the circuit is energized. Both methods have the following significant drawbacks:

[0003] Impact on user electricity consumption: The power supply to users must be interrupted during the verification process, causing inconvenience to users, especially to enterprises with continuous production.

[0004] The operation is cumbersome and inefficient: it requires disconnecting, connecting, and restoring the circuit, which involves many steps, takes a long time, and is inefficient.

[0005] Safety risks: Although there are methods to test meters without interrupting power, these methods require the use of screwdrivers for on-site wiring, which is extremely dangerous and the personal safety of the workers cannot be guaranteed.

[0006] Limited applicability: Traditional verification methods are difficult to implement for certain critical loads or situations where power outages are not possible. Utility Model Content

[0007] To address the aforementioned problems, this utility model provides a safety-type electricity meter liveness test device.

[0008] The technical solution of this utility model is as follows:

[0009] A safety-type live-line testing device for electricity meters includes a testing device body and a terminal box adapted for installation therewith. Several sets of data acquisition contacts and communication contacts are arranged at the rear of the testing device body. Each set of data acquisition contacts includes a single voltage data acquisition contact and two current data acquisition contacts, arranged vertically on the same side as the voltage data acquisition contact. An insulating ceramic pin is provided at the outer end of the upper current data acquisition contact. A detection and processing module is installed inside the testing device body, electrically connecting each data acquisition contact and the communication contact. Data acquisition sockets and communication sockets adapted to each data acquisition contact of the testing device body are provided at the front of the terminal box. Several wiring holes are provided at the top and bottom of the terminal box, and a wire clamping screw is provided at the front of the terminal box, communicating with each wiring hole.

[0010] The wiring holes include current wiring holes and voltage wiring holes arranged at intervals.

[0011] Current terminals are installed in the current wiring holes at the top and bottom of the terminal box, and the current terminals are connected to each other by elastic metal sheets.

[0012] One end of the elastic metal sheet is fixedly connected to the lower current terminal, and the other end of the elastic metal sheet is in contact with the upper current terminal. It can be disengaged from the upper current terminal when the upper side of the elastic metal sheet is touched by the insulating ceramic pin.

[0013] The voltage wiring holes at both ends of the terminal box are connected and voltage terminals are installed.

[0014] To facilitate the fixed installation of the meter inspection device body, a fixing buckle is provided on the side of the meter inspection device body.

[0015] The terminal box has snap-fit ​​mounting parts on both sides at the front end, which facilitates the direct insertion and removal of the meter verification device body.

[0016] The terminal box has mounting parts on both rear sides for fixing, and can be fixedly installed below the electricity meter.

[0017] To facilitate communication between the device and the electricity meter, the communication contacts are 485 communication contacts.

[0018] The main body of the meter verification device is equipped with a display screen and operation buttons on the front. The display screen and operation buttons are electrically connected to the detection and processing module, which facilitates data viewing during meter verification.

[0019] This utility model relates to a safety-type live-line testing device for electricity meters, comprising a testing device body and a terminal box. The testing device body has data acquisition contacts and communication contacts at the rear, and an internal detection and processing module connects to each contact. The terminal box has an adapter socket at the front, and wiring holes at the top and bottom for voltage and current terminals. The advantages of this device are:

[0020] Unaffected by user power supply: The device can perform live meter verification without interrupting the power supply to users, avoiding inconvenience to users, especially those in continuous production enterprises, and solving the problem of traditional verification methods affecting user power supply.

[0021] Simple to operate and highly efficient: Unlike traditional methods, there is no need to disconnect, reconnect, and restore the circuit. Simply snap the main body of the meter testing device onto the terminal box to perform the test, reducing operation steps, saving time, and improving testing efficiency.

[0022] Reduced safety risks: No screwdriver is needed for live wiring operations. Through ingenious structural design, such as the combination of insulated ceramic pins and elastic metal sheets, the safety of operators is ensured while current is collected, thus solving the safety hazards of traditional live-line meter testing methods. Attached Figure Description

[0023] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0024] In the attached diagram:

[0025] Figure 1 This is a schematic diagram of the main structure of the meter verification device;

[0026] Figure 2 This is a structural schematic diagram of a terminal block;

[0027] Figure 3 A schematic diagram of the installation of a safety-type electricity meter with a voltage testing device;

[0028] Figure 4 This is a structural diagram of a terminal box without a data acquisition contact.

[0029] Figure 5 A structural diagram of the terminal box for receiving the insertion of the contact points;

[0030] 1. Main body of the meter testing device; 2. Terminal box; 3. Voltage acquisition contact; 4. Upper current acquisition contact; 5. Lower current acquisition contact; 6. Insulating ceramic pin; 7. Communication contact; 8. Wire clamping screw; 9. Current acquisition socket; 10. Voltage acquisition socket; 11. Communication socket; 12. Lower current terminal; 13. Upper current terminal; 14. Flexible metal sheet; 15. Voltage terminal; 16. Current transmission line; 17. Voltage transmission line. Detailed Implementation

[0031] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0032] Example

[0033] See Figure 1This embodiment provides a safety-type live-line testing device for electricity meters, including a testing device body 1 and a terminal box 2 adapted to be installed therewith. Several sets of data acquisition contacts and communication contacts 7 are arranged at the rear of the testing device body 1; each set of data acquisition contacts includes a single voltage acquisition contact 3 and two current acquisition contacts, arranged vertically on the same side as the voltage acquisition contact 3; an insulating ceramic pin 6 is provided at the outer end of the upper current acquisition contact 4, which can push open the internal elastic metal sheet 14 when inserted into the terminal box 2. A detection and processing module is provided inside the testing device body 1, which is electrically connected to the voltage acquisition contact 3, the current acquisition contact, and the communication contacts 7 respectively.

[0034] In practical use, the main body 1 of the meter verification device is equipped with at least three sets of acquisition contacts, including A-phase voltage acquisition contacts, A-phase current acquisition contacts, B-phase voltage acquisition contacts, B-phase current acquisition contacts, C-phase voltage acquisition contacts, and C-phase current acquisition contacts. The A-phase voltage acquisition contacts are used to acquire the voltage signal of the A-phase power transmission line, and the same applies to the other phase lines; the A-phase current acquisition contacts are used to acquire the current signal of the A-phase power transmission line, and the same applies to the other phase lines.

[0035] Meanwhile, to facilitate data viewing during meter calibration, a display screen and operation buttons are provided on the front of the main body 1 of the meter calibration device. The display screen and operation buttons are electrically connected to the detection and processing module. The display screen can display the electrical energy data collected by the main body 1 of the meter calibration device during calibration, and the operation buttons can control the display interface of the display screen and the calibration settings of the device.

[0036] To achieve proper operation in conjunction with the main body 1 of the meter verification device, see [link / reference]. Figure 2 The terminal box 2 has acquisition sockets and communication sockets 11 on its front end, each compatible with the acquisition contacts of the meter measuring device body 1. The acquisition sockets include current acquisition sockets 9 and voltage acquisition sockets 10. The terminal box 2 has several wiring holes at its upper and lower ends, and a clamping screw 8 is provided on its front end, connecting to each wiring hole. The wiring holes include spaced-apart current wiring holes and voltage wiring holes. Current terminals are installed in the current wiring holes at the upper and lower ends of the terminal box 2, and these terminals are connected by elastic metal sheets 14. One end of the elastic metal sheet 14 is fixedly connected to the lower current terminal 12, and the other end of the elastic metal sheet 14 abuts against the upper current terminal 13. The elastic metal sheet 14 can be disengaged from the upper current terminal 13 when the insulating ceramic pin 6 contacts the upper side of the elastic metal sheet 14. The voltage wiring holes at the upper and lower ends of the terminal box 2 are connected and a voltage wiring terminal 15 is installed. The terminal box 2 is connected in series between the energy meter and the three-phase power transmission line through the current wiring terminal and the voltage wiring terminal 15, and the power transmission line is fixed by the wire clamping screw 8.

[0037] like Figure 3 As shown, the terminal box 2 has mounting parts for fixing on both rear sides. During installation, the terminal box 2 is installed below the electricity meter by screws installed on the mounting parts, and the terminal box 2 is always electrically connected to the electricity meter. The terminal box 2 has snap-fit ​​mounting parts on both front sides, and the meter verification device body 1 has fixing snaps on its sides for engaging with the snap-fit ​​mounting parts of the terminal box 2. When performing on-site verification, the meter verification device body 1 is snapped onto the terminal box 2, thereby achieving metering verification of the electricity meter.

[0038] To facilitate communication between the device and the electricity meter, the communication contact 7 adopts RS485 communication contact 7, which can exchange data with the electricity meter through the RS485 communication protocol.

[0039] like Figure 4 As shown, in normal use, only the terminal box 2 is connected below the electricity meter. The electricity meter collects voltage through the voltage transmission line 17, voltage terminal 15, and voltage transmission line 17 formed by the terminal box 2. In normal use, the elastic metal piece 14 is in contact with the upper current terminal 13. The electricity meter collects current through the current transmission line 16, lower current terminal 12, elastic metal piece 14, upper current terminal 13, and current transmission line 16 formed by the current transmission line 16.

[0040] like Figure 5 As shown, when it is necessary to test the accuracy of the electricity meter, the main body 1 of the meter testing device and the terminal box 2 are fastened together and the fixing buckle is used to secure the two tightly.

[0041] For voltage acquisition, the voltage acquisition contact 3 is inserted into the voltage terminal 15 through the voltage acquisition socket to form a parallel circuit to realize the acquisition of voltage signal by the detection and processing module.

[0042] For current acquisition, two current acquisition contacts are inserted into the current terminals at both ends of the current connection hole through the current acquisition socket. When initially inserted, the current transmission line 16, the lower current terminal 12, the lower current acquisition contact 5, the detection and processing module, the upper current acquisition contact 4, the upper current terminal 13, and the current transmission line 16 form a circuit. At this time, the elastic metal sheet 14 has not yet been pushed open and is still in close contact with the upper current terminal 13. This ensures that the normal operation of the meter is not affected and will not cause abnormal operation of the meter, nor will it cause an open circuit in the internal current transformer (the current transformer is not allowed to be open-circuited, otherwise it will be burned out). After the current acquisition contact is further inserted, the insulating ceramic pin 6 pushes open the elastic metal sheet 14, thereby disconnecting the connection with the upper current terminal 13. At this time, the current acquisition circuit becomes a separate path consisting of the current transmission line 16, the lower current terminal 12, the lower current acquisition contact 5, the detection and processing module, the upper current acquisition contact 4, the upper current terminal 13, and the current transmission line 16. That is, the current transmission line 16 is connected to the main body of the metering device 1 through the meter, and the detection and processing module can sample the current signal flowing through it. The detection and processing module receives the acquired data from the meter through the 485 communication contact 7 and performs interactive comparison to complete the meter verification operation. After the operation is completed, the main body of the meter verification device 1 can be directly unplugged without affecting the operation of the line, and the principle is the same as above.

Claims

1. A safety type electric energy meter live meter checking device, characterized in that, The device includes a main body for meter verification and a terminal box adapted for installation therewith. Several sets of data acquisition contacts and communication contacts are arranged at the rear of the main body of the device. Each set of data acquisition contacts includes a single voltage data acquisition contact and two current data acquisition contacts, arranged vertically on the same side as the voltage data acquisition contact. An insulating ceramic pin is provided at the outer end of the upper current data acquisition contact. A detection and processing module is installed inside the main body of the device, and the detection and processing module is electrically connected to each data acquisition contact and the communication contact. The front of the terminal box is provided with acquisition sockets and communication sockets that are compatible with the acquisition contacts of the main body of the meter verification device; the upper and lower ends of the terminal box are provided with several wiring holes, and the front of the terminal box is provided with clamping screws that are connected to each wiring hole.

2. The safety electric energy meter live checking device according to claim 1, characterized in that, The wiring holes include current wiring holes and voltage wiring holes arranged at intervals.

3. The safety electric energy meter live testing device according to claim 2, characterized in that, Current terminals are installed in the current wiring holes at the top and bottom of the terminal box, and the current terminals are connected to each other by elastic metal sheets.

4. The safety electric energy meter live testing device according to claim 2, characterized in that, The voltage wiring holes at both ends of the terminal box are connected and voltage terminals are installed.

5. The safety electric meter live testing apparatus according to claim 1, wherein, The main body of the meter testing device is provided with a fixing buckle on the side.

6. The safety-type electricity meter live-line testing device according to claim 5, characterized in that, The terminal box has snap-fit ​​mounting parts on both front sides.

7. The safety electric meter live testing device according to claim 3, wherein, One end of the elastic metal sheet is fixedly connected to the lower current terminal, and the other end of the elastic metal sheet is in contact with the upper current terminal. It can be disengaged from the upper current terminal when the upper side of the elastic metal sheet is touched by the insulating ceramic pin.

8. The safety electric meter live testing apparatus according to claim 1, wherein, The terminal box has mounting parts for fixing on both rear sides.

9. The safety electric meter live testing apparatus according to claim 1, wherein, The communication contact uses a 485 communication contact.

10. The safety electric meter live testing apparatus according to claim 1, wherein, The front of the main body of the test device is equipped with a display screen and operation buttons, which are electrically connected to the test processing module.

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