Metering fault detection device

Abstract

The invention discloses a metering fault detection device. The device comprises a main switch, one end of which is connected with a power supply input port through a power test line, and the other end of which is connected with a power supply output port through a power test line; the three-phase four-wire straight-through type electric energy meter is connected with the three-phase four-wire straight-through type electric energy meter interface through an electric power test wire; the three-phase four-wire mutual inductance type electric energy meter is connected with one end of the three-phase four-wire mutual inductance type electric energy meter junction box through an electric power test line; the single-phase electric energy meter is connected with the single straight-through type electric energy meter interface through an electric power test line; one end of the air switch is connected with the air switch input interface through a power test line, and the other end of the air switch is connected with the air switch output interface through a power test line; and the light-emitting device is connected with the adjustable resistor through an electric power test line. According to the invention, the technical problem of low use efficiency of the metering fault detection device is solved.

Description

Technical Field

[0001] The present application relates to the technical field of anti-electricity theft training equipment, and in particular to a metering fault detection device. Background Art

[0002] At present, metering failure and anti-electricity theft training and teaching usually use large-scale training devices, which display the status through a computer connected to a display screen. They can intuitively display a variety of metering failures and electricity theft conditions and simulate anti-electricity theft, and are therefore widely used in training rooms.

[0003] However, the above training device is mainly suitable for situations where the number of trainees is small and the number of times is high. If the number of trainees is large and the trainers are scattered, the training device cannot be carried and moved, and the number of times it is used will drop sharply. In addition, the training device is relatively expensive and can only be operated by one person, resulting in high working intensity of the training device in a short period of time, and the components are easily damaged, resulting in a technical problem of low efficiency in the use of the metering fault detection device.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiment of the present application provides a device for detecting metering failures, so as to at least solve the technical problem of low utilization efficiency of the device for detecting metering failures.

[0006] According to one aspect of the embodiments of the present application, a metering fault detection device is provided. The device may include: a main switch, one end of which is connected to the power input port through a power test line, and the other end of which is connected to the power output port through a power test line, for controlling the on / off state of the power supply; a three-phase four-wire direct-type energy meter, which is connected to the three-phase four-wire direct-type energy meter interface through a power test line, for measuring the electric energy consumed in the three-phase four-wire circuit; a three-phase four-wire mutual inductance energy meter, which is connected to one end of the three-phase four-wire mutual inductance energy meter junction box through a power test line, for measuring the electric energy consumed in the three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance energy meter junction box is connected to the three-phase four-wire mutual inductance energy meter junction box through a power test line. One end is connected to the outlet interface through the power test line; the single-phase electric energy meter is connected to the single straight-through electric energy meter interface through the power test line, and is used to measure the electric energy consumed in the single-phase circuit; the air switch, one end is connected to the air switch input interface through the power test line, and the other end is connected to the air switch output interface through the power test line, and is used to control the switch of the three-phase four-wire straight-through electric energy meter, the three-phase four-wire mutual inductance electric energy meter and the single-phase electric energy meter; the light-emitting device is connected to the adjustable resistor through the power test line, and is used to indicate the fault state of the circuit in the detection device of the metering fault.

[0007] Optionally, the other end of the main switch is connected to a fuse via a power test line, and the fuse is connected to a power outlet via the power test line, wherein the fuse is used to cut off current.

[0008] Optionally, a three-phase four-wire mutual inductance type energy meter interface is provided below the three-phase four-wire mutual inductance type energy meter junction box.

[0009] Optionally, the air switch output interface is connected to a fixed resistor through a power test line.

[0010] Optionally, the air switch includes at least a first air switch, a second air switch and a third air switch, wherein the first air switch is used to control the power switch or phase disconnect switch of a three-phase four-wire mutual inductance electric energy meter, the second air switch is used to control the power switch or line disconnect switch of a three-phase four-wire direct-through electric energy meter, and the third air switch is used to control the power switch or line disconnect switch of a single-phase electric energy meter.

[0011] Optionally, the power test line includes a first power test line and a second power test line, and the device also includes: a current transformer, connected to the positive wiring port through the first power test line and connected to the negative wiring port through the second power test line, for monitoring current changes.

[0012] Optionally, the current transformer includes at least a first current transformer, a second current transformer and a third current transformer, wherein the first current transformer is connected to the first positive wiring port through the first power test line, and is connected to the first negative wiring port through the second power test line, the second current transformer is connected to the second positive wiring port through the first power test line, and is connected to the second negative wiring port through the second power test line, and the third current transformer is connected to the third positive wiring port through the first power test line, and is connected to the third negative wiring port through the second power test line.

[0013] Optionally, the device further includes: a plurality of sliding resistors and a plurality of fixed resistors, wherein the sliding resistors are used to adjust the resistance value, and the fixed resistors are used to limit the current or voltage.

[0014] Optionally, the device further includes: a power test line placement area for placing the power test line.

[0015] Optionally, the device is applied in anti-electricity theft training teaching scenarios.

[0016] In the embodiment of the present application, a main switch is connected to the power input port at one end through a power test line, and is connected to the power output port at the other end through a power test line, so as to control the on / off state of the power supply; a three-phase four-wire direct-type energy meter is connected to the three-phase four-wire direct-type energy meter interface through a power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit; a three-phase four-wire mutual inductance energy meter is connected to one end of the three-phase four-wire mutual inductance energy meter junction box through a power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance energy meter junction box is connected to the outlet interface through a power test line; a single-phase energy meter, through The electric power test line is connected to the single straight-through electric energy meter interface, and is used to measure the electric energy consumed in the single-phase circuit; the air switch, one end of which is connected to the air switch input interface through the electric power test line, and the other end is connected to the air switch output interface through the electric power test line, and is used to control the switching of the three-phase four-wire straight-through electric energy meter, the three-phase four-wire mutual inductance electric energy meter and the single-phase electric energy meter; the light-emitting device is connected to the adjustable resistor through the electric power test line, and is used to indicate the fault state of the circuit in the metering fault detection device, thereby achieving the technical effect of improving the utilization efficiency of the metering fault detection device, and then solving the technical problem of low utilization efficiency of the metering fault detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 is a schematic diagram of a device for detecting metering failure according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of an exposed wire of a metering fault detection device according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the layout of an inner door panel of a metering fault detection device according to an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of a bottom plate layout of a metering fault detection device according to an embodiment of the present application;

[0022] Figure 5 is a schematic diagram of simulating three-phase imbalance according to an embodiment of the present application;

[0023] Figure 6 is a schematic block diagram of an electronic device 600 according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, device, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, products or equipment.

[0026] Figure 1 is a schematic diagram of a device for detecting metering failure according to an embodiment of the present application, such as Figure 1 As shown, the metering fault detection device 100 may at least include: a main switch 10, a three-phase four-wire direct-type electric energy meter 20, a three-phase four-wire mutual inductance electric energy meter 30, a single-phase electric energy meter 40, an air switch 50 and a light-emitting device 60.

[0027] The main switch 10 has one end connected to the power input port through a power test line, and the other end connected to the power output port through a power test line, and is used to control the on / off state of the power supply.

[0028] Optionally, the main switch can be a leakage protection air switch, which is a three-phase four-wire system (3P+N), with a rated working voltage (AC) of 400 volts (V), a rated working current of 16 amperes (A), and a leakage action current of 0.03A. It can be called the main switch of the device and is used to control the power on and off of the equipment.

[0029] Optionally, there are five interfaces on the power input port, namely, a three-phase line interface (which can be represented by A, B, and C), a neutral line interface (which can be represented by N), and a ground line interface (which can be represented by PE). There are ten interfaces on the power output port, and two interfaces are arranged vertically in a row, namely, A, B, C, N, and PE interfaces.

[0030] The three-phase four-wire direct-type electric energy meter 20 is connected to the three-phase four-wire direct-type electric energy meter interface through a power test line, and is used to measure the electric energy consumed in the three-phase four-wire circuit.

[0031] Optionally, the three-phase four-wire direct-type energy meter interfaces include A input, A output, B input, B output, C input, C output and N interface.

[0032] The three-phase four-wire mutual inductance energy meter 30 is connected to one end of the three-phase four-wire mutual inductance energy meter junction box through a power test line, and is used to measure the electric energy consumed in the three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance energy meter junction box is connected to the output interface through the power test line.

[0033] Optionally, there are ten interfaces below the three-phase four-wire mutual inductance energy meter, which can be represented by I11, V1, I13, I21, V2, I23, I31, V3, I33 and N, respectively, where I represents the current test line, V represents the voltage test line, and since the current test line is one-in and one-out, and the voltage test line has only one interface, I is followed by two digits and V is followed by only one digit. There are ten outlet interfaces below the junction box of the three-phase four-wire mutual inductance energy meter, which can be represented by numbers one to ten.

[0034] The single-phase electric energy meter 40 is connected to the single-phase direct-type electric energy meter interface through a power test line, and is used to measure the electric energy consumed in the single-phase circuit.

[0035] Optionally, four interfaces are provided on the single through-type electric energy meter interface, namely, current line (L) in, L out, N in and N out.

[0036] The air switch 50 has one end connected to the air switch input interface through a power test line, and the other end connected to the air switch output interface through a power test line, and is used to control the switches of the three-phase four-wire direct-type electric energy meter 20, the three-phase four-wire mutual inductance electric energy meter 30 and the single-phase electric energy meter 40.

[0037] Optionally, the air switch can be represented by QF, and the first air switch (which can be represented by QF1) can have four interfaces, which are respectively connected to the four interfaces of the air switch input interface and the air switch output interface. The second air switch (which can be represented by QF2) can have two interfaces, which are respectively connected to the two interfaces of the air switch input interface and the air switch output interface. The third air switch (which can be represented by QF3) can have two interfaces, which are respectively connected to the two interfaces of the air switch input interface and the air switch output interface. The fourth air switch (which can be represented by QF4) can have two interfaces, which are respectively connected to the two interfaces of the air switch input interface and the air switch output interface.

[0038] The light emitting device 60 is connected to the adjustable resistor via a power test line and is used to indicate the fault state of the circuit in the metering fault detection device.

[0039] Optionally, the light emitting device 60 may be a lamp bead, which may be represented by H. The adjustable resistor may be represented by RL, which may be referred to as an adjustable resistor. The first lamp bead (which may be represented by H1) is connected to the first adjustable resistor (which may be represented by RL1), the second lamp bead (which may be represented by H2) is connected to the second adjustable resistor (which may be represented by RL2), and the third lamp bead (which may be represented by H3) is connected to the third adjustable resistor (which may be represented by RL3).

[0040] In the embodiment of the present application, the main switch 10 is connected to the power input port at one end through the power test line, and is connected to the power output port at the other end through the power test line, so as to control the on / off state of the power supply; the three-phase four-wire direct-type energy meter 20 is connected to the three-phase four-wire direct-type energy meter interface through the power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit; the three-phase four-wire mutual inductance energy meter 30 is connected to one end of the three-phase four-wire mutual inductance energy meter junction box through the power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance energy meter junction box is connected to the outlet interface through the power test line; the single-phase energy meter 40 , connected to the single straight-through electric energy meter interface through the power test line, and used to measure the electric energy consumed in the single-phase circuit; the air switch 50, one end of which is connected to the air switch input interface through the power test line, and the other end is connected to the air switch output interface through the power test line, and is used to control the switches of the three-phase four-wire straight-through electric energy meter, the three-phase four-wire mutual inductance electric energy meter and the single-phase electric energy meter; the light-emitting device 60, connected to the adjustable resistor through the power test line, is used to indicate the fault state of the circuit in the metering fault detection device, thereby achieving the technical effect of improving the use efficiency of the metering fault detection device, and then solving the technical problem of low use efficiency of the metering fault detection device.

[0041] The above embodiments of the present application are further described below.

[0042] In some embodiments of the present application, the other end of the main switch is connected to the fuse through a power test line, and the fuse is connected to the power outlet through the power test line, wherein the fuse is used to cut off the current.

[0043] In this embodiment, the other end of the main switch is connected to four fuses through power test lines, and the four fuses can be represented by FUL1, FUL2, FUL3 and FUN respectively. The four fuses are connected to the power output port through the power test lines.

[0044] In some embodiments of the present application, a three-phase four-wire mutual inductance type energy meter interface is provided below the three-phase four-wire mutual inductance type energy meter junction box.

[0045] In this embodiment, a three-phase four-wire mutual inductance energy meter interface is provided below the three-phase four-wire mutual inductance energy meter junction box, and four interfaces are provided on the three-phase four-wire mutual inductance energy meter interface, namely A output, B output, C output and N output.

[0046] In some embodiments of the present application, the air switch output interface is connected to a fixed resistor through a power test line.

[0047] In this embodiment, the air switch output interface is connected to six fixed resistors through a power test line. The six fixed resistors can be represented by R1, R2, R3, R4, R5, and R6, respectively.

[0048] It should be noted that the above embodiments are all related components involved in the door panel layout diagram of the device and the connection conditions between the components.

[0049] The following is a further introduction to the relevant components involved in the bottom plate layout diagram of the device.

[0050] In some embodiments of the present application, the air switch includes at least a first air switch, a second air switch and a third air switch, wherein the first air switch is used to control the power switch or the phase disconnect switch of the three-phase four-wire mutual inductance electric energy meter, the second air switch is used to control the power switch or the line disconnect switch of the three-phase four-wire direct-through electric energy meter, and the third air switch is used to control the power switch or the line disconnect switch of the single-phase electric energy meter.

[0051] In this embodiment, the bottom plate layout diagram of the device involves three air switches, the first air switch has four interfaces, namely A, B, C and N. The second air switch has four interfaces, namely A, B, C and N. The third air switch has three interfaces, namely L, N and PE. Among them, the first air switch is used to control the power / phase-off switch of the three-phase four-wire mutual inductance electric energy meter. The second air switch is used to control the power / disconnection switch of the three-phase four-wire direct-through electric energy meter. The third air switch is used to control the power / disconnection switch of the single-phase electric energy meter.

[0052] In some embodiments of the present application, the power test line includes a first power test line and a second power test line, and the device also includes: a current transformer, which is connected to the positive wiring port through the first power test line and to the negative wiring port through the second power test line, for monitoring current changes.

[0053] In this embodiment, the power test line may include a first power test line and a second power test line, and a current transformer may be connected to the positive wiring port through the first power test line and connected to the negative wiring port through the second power test line, and may be used to monitor current changes. Optionally, the current transformer may be represented by CT. The positive wiring port may be represented by +, and the negative wiring port may be represented by -.

[0054] In some embodiments of the present application, the current transformer includes at least a first current transformer, a second current transformer and a third current transformer, wherein the first current transformer is connected to the first positive wiring port through the first power test line, and is connected to the first negative wiring port through the second power test line, the second current transformer is connected to the second positive wiring port through the first power test line, and is connected to the second negative wiring port through the second power test line, and the third current transformer is connected to the third positive wiring port through the first power test line, and is connected to the third negative wiring port through the second power test line.

[0055] In this embodiment, the current transformer may include at least a first current transformer, a second current transformer and a third current transformer, wherein the first current transformer may be represented by CT1, the second current transformer may be represented by CT2, and the third current transformer may be represented by CT3.

[0056] Optionally, the first current transformer is connected to the first positive wiring port through the first power test line, and is connected to the first negative wiring port through the second power test line. The first positive wiring port can be represented by CT1+, and the first negative wiring port can be represented by CT1-. The second current transformer is connected to the second positive wiring port through the first power test line, and is connected to the second negative wiring port through the second power test line. The second positive wiring port can be represented by CT2+, and the second negative wiring port can be represented by CT2-. The third current transformer is connected to the third positive wiring port through the first power test line, and is connected to the third negative wiring port through the second power test line. The third positive wiring port can be represented by CT3+, and the third negative wiring port can be represented by CT3-.

[0057] In some embodiments of the present application, the device further includes: a plurality of sliding resistors and a plurality of fixed resistors, wherein the sliding resistors are used to adjust the resistance value, and the fixed resistors are used to limit the current or voltage.

[0058] In this embodiment, the device further includes: a plurality of sliding resistors and a plurality of fixed resistors. Optionally, the device may include six sliding resistors, represented by R1 sliding resistor, R2 sliding resistor, R3 sliding resistor, R4 sliding resistor, R5 sliding resistor and R6 sliding resistor, and six fixed resistors, represented by R1 fixed resistor, R2 fixed resistor, R3 fixed resistor, R4 fixed resistor, R5 fixed resistor and R6 fixed resistor.

[0059] In some embodiments of the present application, the device further includes: a power test line placement area for placing the power test line. In this embodiment, the device may also include a power test line placement area, which can be used to place the power test line so that the power test line can move with the device.

[0060] In some embodiments of the present application, the device is used in anti-electricity theft training and teaching scenarios. Optionally, the device uses computer technology, simulation technology and virtual load technology to achieve zero-distance connection between training and actual production operations, and can not only conduct anti-electricity theft theory teaching but also demonstrate various electricity theft methods in actual production, so that the device has multi-level training functions such as teaching, learning and practicing.

[0061] In the embodiment of the present application, a main switch is connected to the power input port at one end through a power test line, and is connected to the power output port at the other end through a power test line, so as to control the on / off state of the power supply; a three-phase four-wire direct-type energy meter is connected to the three-phase four-wire direct-type energy meter interface through a power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit; a three-phase four-wire mutual inductance energy meter is connected to one end of the three-phase four-wire mutual inductance energy meter junction box through a power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance energy meter junction box is connected to the outlet interface through a power test line; a single-phase energy meter, through The electric power test line is connected to the single straight-through electric energy meter interface, and is used to measure the electric energy consumed in the single-phase circuit; the air switch, one end of which is connected to the air switch input interface through the electric power test line, and the other end is connected to the air switch output interface through the electric power test line, and is used to control the switching of the three-phase four-wire straight-through electric energy meter, the three-phase four-wire mutual inductance electric energy meter and the single-phase electric energy meter; the light-emitting device is connected to the adjustable resistor through the electric power test line, and is used to indicate the fault state of the circuit in the metering fault detection device, thereby achieving the technical effect of improving the utilization efficiency of the metering fault detection device, and then solving the technical problem of low utilization efficiency of the metering fault detection device.

[0062] In order for those skilled in the art to better understand the technical solution of the present application, a specific embodiment is now described.

[0063] In the related art, a low-voltage metering anti-electricity theft training device is provided, which includes an isolation transformer, an electricity theft simulator, an electric energy meter, a communication module and a computer, wherein the isolation transformer and the electric energy meter are respectively connected to the input and output terminals of the electricity theft simulator, and the computer communicates with the electricity theft simulator through the communication module to control the electricity theft simulator to simulate different electricity theft methods. The electricity theft simulator includes a switching power supply, a communication module, a single-chip microcomputer control circuit and a relay matrix circuit. The relay matrix circuit includes a relay driver chip and a plurality of relays, the switching power supply is respectively connected to the communication module and the single-chip microcomputer control circuit to provide power, and the communication module is connected to the single-chip microcomputer control circuit. The device solves the problem of backward low-voltage metering anti-electricity theft teaching experiments or training methods, and is safe, reliable and practical.

[0064] In addition, an intelligent anti-electricity theft training device is provided, which relates to the technical field of anti-electricity theft training equipment. The device includes an operating cabinet, which includes an operating table and an operating cabinet. The upper surface of the operating table is fixedly connected with a horizontal indicator panel, the front side of the operating cabinet is fixedly connected with a vertical indicator panel, one side of the horizontal indicator panel is fixedly connected with a storage box, the storage box is provided with indicator stickers and colored pens inside, and the upper end of the operating cabinet is fixedly connected with a linear guide rail. The intelligent anti-electricity theft training device is convenient for shooting the teaching process through the coordinated arrangement of the linear guide rail, the universal bamboo tube, the camera and the rubber block, and the intelligent anti-electricity theft training device has the effect of intuitively displaying the operation steps through the coordinated arrangement of the operating cabinet, the indicator stickers and the colored pens.

[0065] Metering device fault troubleshooting and electricity theft investigation are important projects. Currently, only large power supply bureaus or training bases have a few metering wiring simulation training devices. It is difficult to apply routine metering failure and anti-electricity theft training to a large number of team metering operation and maintenance personnel, and cannot meet the training needs of trainees. In addition, the existing metering wiring training devices are expensive and large in size, and the equipment is easily damaged during use. The portable metering failure and anti-electricity theft training teaching device has a box-type structure, which is convenient to carry to different sites for demonstration and practice. It has a low development cost and is more convenient to use than a cabinet-type wrong wiring simulation device. It is cost-effective and convenient for training and learning of grassroots power supply stations and a large number of electricity inspection personnel.

[0066] At present, large-scale training devices are usually used for metering failure and anti-electricity theft training and teaching, and the status is displayed through a light emitting diode (LED) display screen or a computer connected to the device. Because it can intuitively display a variety of metering failures and electricity theft status, and simulate anti-electricity theft, it is widely used in training rooms. However, it is mainly suitable for situations where the number of trainees is small and the number of times is large. At the grassroots level, it is difficult for grassroots trainers to conduct individual training for a single power supply station because of the full work schedule and heavy tasks. If multiple stations are trained, the number of trainees is large and the trainers are scattered, and the shortcomings of large-scale training devices that cannot be carried and moved and are used less frequently are revealed. Large-scale training devices are expensive and can only be operated by one person. When there are many trainees, it undoubtedly takes up a lot of time for trainers and trainers. If the number of training devices is increased, the purchase cost and the cost of daily maintenance will make the grassroots miserable. A trainer usually trains twenty to thirty people at a time. The training device has high work intensity in a short period of time and its components are easily damaged. Therefore, how to design a metering failure and anti-electricity theft training device that is low-cost, simple to maintain, and can be carried by trainers to each grassroots department for training is an urgent problem that needs to be solved.

[0067] In order to solve the above problems, the present application proposes a portable metering fault and anti-electricity theft training and teaching device, which is mainly aimed at the training of new employees and in-service employees of power supply enterprises, so that new employees and in-service employees of power supply enterprises can quickly master anti-electricity theft technology and loss reduction and energy saving, and maintain the normal order of electricity consumption. It is based on typical electricity theft examples such as phase failure, undervoltage, undercurrent, and phase shift, and is developed using current advanced electronic network technology to integrate training and learning, theoretical verification, practical operation ability, and assessment and appraisal. The device has the function of simulating electricity theft site, convenient fault setting, simple and portable cabinet (or display board form), good reliability, etc., and can meet the needs of training, assessment and technical appraisal of related types of work and management personnel such as electricity inspection, meter installation and connection, meter reading and charging.

[0068] The device is equipped with voltage and current leakage protection circuits to ensure the personal safety of training operators, and is also equipped with overcurrent and short-circuit protection devices to ensure the safety of the equipment. The use of virtual load power supply has well solved the safety and power consumption problems, and can simulate the measurement operation of single-phase and three-phase four-wire meters under resistive, capacitive and inductive loads.

[0069] This embodiment uses computer technology, simulation technology and virtual load technology to achieve zero-distance connection between training and actual production operations. It can not only conduct theoretical teaching on anti-electricity theft, but also demonstrate various means of electricity theft in actual production, so that the device has multi-level training functions such as teaching, learning and practicing.

[0070] Compared with the prior art, the device has wider applicability, lower cost, and can provide a better training plan for centralized training at the base. The device is easy to carry, more convenient to use than a cabinet-type miswiring simulation device, and has high cost performance. In the case where it is difficult to conduct centralized training for trainees at the grassroots level, the device has significant advantages over traditional training methods. After the training, this embodiment will perform statistical analysis on the data of all trainees' operations and generate a training report, which is easy for trainees to review after class.

[0071] In this embodiment, the training for new employees and current employees of the power supply enterprise enables them to quickly master anti-electricity theft technology and loss reduction and energy saving, and maintain the normal order of electricity use. Based on typical examples of electricity theft such as phase failure, undervoltage, undercurrent, and phase shift, a practical training device integrating training and learning, theoretical verification, practical operation ability, and assessment and appraisal is developed using current advanced electronic network technology. The device has the function of simulating electricity theft site, convenient fault setting, simple and portable cabinet (or display board form), good reliability, etc., and can meet the needs of training, assessment and technical appraisal of related types of work and management personnel such as electricity inspection, meter installation and connection, meter reading and charging.

[0072] The metering fault and anti-electricity theft training and teaching device uses a knob to achieve the gear setting of various fault conditions. For example, phases A, B, and C each have three gears, and can be set in random combination. In addition, the neutral line also has gear settings such as disconnection or high resistance. The load can also be adjusted by sliding resistors, light bulbs, etc., so that several types of fault analysis can be simulated.

[0073] The demonstration is carried out through two low-voltage energy meter access methods, direct access energy meter and current transformer access energy meter. The direct access energy meter can realize the display of faults and electricity theft scenarios such as phase loss, voltage loss, phase line misconnection, current loss, and single-phase energy meter single-phase power consumption. The current transformer access energy meter can realize the display of faults and electricity theft scenarios such as phase loss, voltage loss, current loss, energy circuit short circuit, secondary side voltage circuit and current circuit wiring errors.

[0074] The device is equipped with an installation panel, a banana socket with a diameter of 4 mm, a leakage air switch (3P+N, AC is 400V, the rated working current is 16A, the leakage action current is 0.03A), a spiral fuse (rated current is 3A), a three-phase four-wire direct-type energy meter, a three-phase four-wire mutual inductance energy meter, a single-phase energy meter, and an inductive current transformer. The inductive current transformer has three channels, which can be used as CT1, CT2 and CT3 respectively. It is indicated that the rated current of each channel is 10A or 5A, the air switch (QF1) is 4-pole (4P), the rated current is 16A, the air switch (QF2-QF5) is 2-pole (2P), the rated current is 16A, the AC of the lamp beads (H1-H3) is 220V, the adjustable resistor (RL1-RL3) is 0-10 kilo (k) ohms (Ω) adjustable, the fixed resistor (R1-R6) is 450Ω, and the sliding resistor (R1-R6) is 0-150Ω. The internal resistive dummy load, at the rated voltage of 380V, a single dummy load can generate a current of 0.63-0.84A, and its power consumption is 240-320 watts (W); at the rated voltage of 220V, a single dummy load can generate a current of 0.37-0.49A, and its power consumption is 80-107W.

[0075] Table 1 Adjusting the sliding resistance to be a dummy load current and power consumption change diagram

[0076]

[0077] The power supply of the device adopts three-phase five-wire input, and can also use three-phase four-wire input. In order to reflect the training, the device is equipped with banana sockets and power test wires, which can be connected to different experimental situations through different wiring methods. Several power test wires are placed in the power test wire area for easy use with the device.

[0078] All the straight lines on the panel layout diagram inside the box are internal wiring, the device symbol is a built-in resistor (resistive dummy load), and the text is a comment. A built-in resistor is set inside the box. If there is power at the input end of the circuit breaker (LN), after the circuit breaker is closed, the resistor will be put into the LN circuit. The resulting current and power consumption are shown in Table 1.

[0079] The device is equipped with configurable faults, such as disconnection, phase sequence change, zero-phase grounding, reverse connection of current transformer, etc. The corresponding function can be set by opening the inner door. After closing the inner door, it is impossible to see what fault is set. The addition of a meter junction box allows the meter to be wired with power on, reflecting the actual situation of wiring a newly installed meter with power on.

[0080] The device exposes three meters and power input wires, which can be used to measure current with a clamp meter. Figure 2 is a schematic diagram of a wire exposure of a metering fault detection device according to an embodiment of the present application, such as Figure 2 As shown, it can be seen that the wire 201 that can be clamped by the clamp meter and the protective wire 202 are exposed. In addition, four rubber wheels are added to the bottom of the box, and handrails are added on the left and right sides of the box to facilitate moving or lifting the box.

[0081] Figure 3 is a schematic diagram of the layout of the inner door panel of a metering fault detection device according to an embodiment of the present application, such as Figure 3 As shown, the main switch of the device is used to control the power on and off of the equipment. It can be a leakage protection air switch (hereinafter referred to as air switch). The switch is 3P+N, AC400V, 16A, and the leakage action current is 0.03A. There are five interfaces on the power input port, namely A, B, C, N and PE interfaces. There are ten interfaces on the power output port, and two interfaces are arranged vertically in a row, namely A, B, C, N and PE interfaces. The other end of the main switch is connected to the four fuses FUL1, FUL2, FUL3 and FUN respectively through the power test line, and the four fuses are connected to the power output port through the power test line.

[0082] The three-phase four-wire direct-type watt-hour meter is connected to the three-phase four-wire direct-type watt-hour meter interface through the power test line. The three-phase four-wire direct-type watt-hour meter interface has A input, A output, B input, B output, C input, C output and N interface respectively.

[0083] The three-phase four-wire mutual inductance watt-hour meter is connected to one end of the three-phase four-wire mutual inductance watt-hour meter junction box through a power test line, and the other end of the three-phase four-wire mutual inductance watt-hour meter junction box is connected to the outlet interface through a power test line. There are ten interfaces I11, V1, I13, I21, V2, I23, I31, V3, I33 and N below the three-phase four-wire mutual inductance watt-hour meter. There are ten outlet interfaces below the three-phase four-wire mutual inductance watt-hour meter junction box, which can be represented by numbers one to ten respectively. A three-phase four-wire mutual inductance watt-hour meter interface is arranged below the three-phase four-wire mutual inductance watt-hour meter junction box, and four interfaces A out, B out, C out and N are arranged on the three-phase four-wire mutual inductance watt-hour meter interface.

[0084] The single-phase watt-hour meter is connected to the single straight-through watt-hour meter interface through a power test line. The single straight-through watt-hour meter interface is provided with four interfaces L-in, L-out, N-in and N-out.

[0085] One end of the air switch 50 is connected to the air switch input interface through the power test line, and the other end is connected to the air switch output interface through the power test line. The first air switch QF1 has four interfaces, which are respectively connected to the four interfaces of the air switch input interface and the air switch output interface. The second air switch QF2 has two interfaces, which are respectively connected to the two interfaces of the air switch input interface and the air switch output interface. The third air switch QF3 has two interfaces, which are respectively connected to the two interfaces of the air switch input interface and the air switch output interface. The fourth air switch QF4 has two interfaces, which are respectively connected to the two interfaces of the air switch input interface and the air switch output interface. The air switch output interface is connected to six fixed resistors R1, R2, R3, R4, R5, and R6 through the power test line.

[0086] The lamp beads are connected to the adjustable resistors through the power test wires. The first lamp bead H1 is connected to the first adjustable resistor RL1, the second lamp bead H2 is connected to the second adjustable resistor RL2, and the third lamp bead H3 is connected to the third adjustable resistor RL3.

[0087] Figure 4 is a schematic diagram of a bottom plate layout of a metering fault detection device according to an embodiment of the present application, such as Figure 4 As shown, the first air switch has four interfaces A, B, C and N. The second air switch has four interfaces A, B, C and N. The third air switch has three interfaces L, N and PE. Among them, the first air switch is used to control the power / phase-off switch of the three-phase four-wire mutual inductance electric energy meter. The second air switch is used to control the power / disconnection switch of the three-phase four-wire direct-through electric energy meter. The third air switch is used to control the power / disconnection switch of the single-phase electric energy meter.

[0088] It should be noted that both sides of the air switch are banana sockets. If the phase sequence needs to be changed, pull out the wires, swap them, and then plug them back to change the phase sequence. In the banana sockets on the lower side, the first group A, B, C, and N can be connected to the incoming line of a three-phase four-wire mutual inductance energy meter, the second group A, B, C, and N can be connected to the incoming line of a three-phase four-wire direct-through energy meter, L and N can be connected to the incoming line of a single-phase energy meter, and CT1+, CT1-, CT2+, CT2-, CT3+, and CT3- can be connected to the incoming line of a three-phase four-wire mutual inductance energy meter.

[0089] The first current transformer CT1 is connected to the first positive connection port CT1+ through the first power test line, and is connected to the first negative connection port CT1- through the second power test line. The second current transformer CT2 is connected to the second positive connection port CT2+ through the first power test line, and is connected to the second negative connection port CT2- through the second power test line. The third current transformer CT3 is connected to the third positive connection port CT3+ through the first power test line, and is connected to the third negative connection port CT3- through the second power test line. When the first current transformer CT1, the second current transformer CT2 and the third current transformer CT3 are threaded, do not open the secondary contact.

[0090] In the middle of the bottom plate layout of the metering fault detection device, there are placed R1 sliding resistor, R2 sliding resistor, R3 sliding resistor, R4 sliding resistor, R5 sliding resistor and R6 sliding resistor, as well as R1 fixed resistor, R2 fixed resistor, R3 fixed resistor, R4 fixed resistor, R5 fixed resistor and R6 fixed resistor. The bottom of the bottom plate layout of the metering fault detection device has an area for placing a power test line.

[0091] Figure 5 is a schematic diagram of simulating three-phase imbalance according to an embodiment of the present application, such as Figure 5 As shown in the figure, after the black bold solid line is connected, the current of phase A is much larger than the current of phase B and phase C, thereby simulating the three-phase unbalanced situation.

[0092] After connecting to the grassroots computers, the built-in software will score the students' operations in real time, conduct statistical analysis and generate reports, which are convenient for students to review after class. The real-time scoring mechanism encourages students to adjust their strategies immediately during the operation process to improve the efficiency of skill acquisition. At the same time, the system will conduct statistical analysis on the operation data of all students, identify common problems and individual differences in learning, provide targeted teaching adjustment suggestions for trainers, and provide a basis for the formulation of personalized learning paths for students.

[0093] The device in this embodiment has a strong electrical isolation simulation signal input to reduce safety hazards; a high-precision proportional training device box is portable and easy to use; a free plug-in interface design allows free combination of training scenarios; and real-time verification of multiple training effects to train trainees to learn the composition, working principle, performance characteristics, installation, operation and maintenance of direct-access and current transformer-access electric energy meters.

[0094] In the embodiment of the present application, a main switch is connected to the power input port at one end through a power test line, and is connected to the power output port at the other end through a power test line, so as to control the on / off state of the power supply; a three-phase four-wire direct-type energy meter is connected to the three-phase four-wire direct-type energy meter interface through a power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit; a three-phase four-wire mutual inductance energy meter is connected to one end of the three-phase four-wire mutual inductance energy meter junction box through a power test line, so as to measure the electric energy consumed in the three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance energy meter junction box is connected to the outlet interface through a power test line; a single-phase energy meter, through The electric power test line is connected to the single straight-through electric energy meter interface, and is used to measure the electric energy consumed in the single-phase circuit; the air switch, one end of which is connected to the air switch input interface through the electric power test line, and the other end is connected to the air switch output interface through the electric power test line, and is used to control the switching of the three-phase four-wire straight-through electric energy meter, the three-phase four-wire mutual inductance electric energy meter and the single-phase electric energy meter; the light-emitting device is connected to the adjustable resistor through the electric power test line, and is used to indicate the fault state of the circuit in the metering fault detection device, thereby achieving the technical effect of improving the utilization efficiency of the metering fault detection device, and then solving the technical problem of low utilization efficiency of the metering fault detection device.

[0095] According to another aspect of an embodiment of the present application, a non-volatile storage medium is further provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any one of the means.

[0096] Optionally, in this embodiment, the storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor devices, apparatuses or equipment, or any suitable combination of the above. More specific examples of the storage medium may include electrical connections based on one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0097] According to another aspect of the embodiments of the present invention, a processor is provided. The processor is used to run a program, wherein the apparatus in the embodiments of the present invention is executed when the program is run.

[0098] In an exemplary embodiment of the present application, a computer program product is further provided, including a computer program, and the computer program implements any of the above-mentioned devices when executed by a processor.

[0099] In an exemplary embodiment of the present application, a computer program product is further provided, comprising a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and the computer program is configured to execute any of the above-mentioned means when running.

[0100] In an exemplary embodiment of the present application, a computer program is further provided, wherein the computer program is configured to execute any of the above-mentioned means when running.

[0101] According to an embodiment of the present application, an electronic device is provided, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute any of the above-mentioned devices.

[0102] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0103] Figure 6 600 is a schematic block diagram of an electronic device according to an embodiment of the present application. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0104] like Figure 6 As shown, the device 600 includes a computing unit 601, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 602 or a computer program loaded from a storage unit 608 into a random access memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the device 600 can also be stored. The computing unit 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0105] A number of components in the device 600 are connected to the I / O interface 605, including: an input unit 606, such as a keyboard, a mouse, etc.; an output unit 607, such as various types of displays, speakers, etc.; a storage unit 608, such as a disk, an optical disk, etc.; and a communication unit 609, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 609 allows the device 600 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0106] The computing unit 601 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 601 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 601 performs the various processes described above. A computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 608. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 600 via ROM 602 and / or communication unit 609. When the computer program is loaded into RAM 603 and executed by the computing unit 601, one or more steps may be performed. Alternatively, in other embodiments, the computing unit 601 may be configured to execute in any other appropriate manner (e.g., by means of firmware).

[0107] Various embodiments of the devices and techniques described above herein can be implemented in digital electronic circuit devices, integrated circuit devices, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), devices on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable device including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage device, at least one input device, and at least one output device, and transmit data and instructions to the storage device, the at least one input device, and the at least one output device.

[0108] The program code for implementing the present application may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, implements the functions / operations specified in the flow chart and / or block diagram. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0109] In the context of the present application, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution device, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor devices, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0110] To provide interaction with a user, the devices and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0111] The apparatus and techniques described herein may be implemented in a computing device that includes backend components (e.g., as a data server), or a computing device that includes middleware components (e.g., an application server), or a computing device that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the apparatus and techniques described herein), or a computing device that includes any combination of such backend components, middleware components, or frontend components. The components of the apparatus may be interconnected by any form or medium of digital data communication (e.g., a communications network). Examples of communications networks include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0112] The computer device may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship between the client and the server is generated by computer programs running on the respective computers and having a client-server relationship with each other. The server may be a cloud server, a server of a distributed device, or a server combined with a blockchain.

[0113] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0114] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0115] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0116] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0117] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0118] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0119] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A device for detecting metering failure, characterized in that: include: A main switch, one end of which is connected to the power input port through a power test line, and the other end of which is connected to the power output port through the power test line, for controlling the on and off state of the power supply; A three-phase four-wire direct-type electric energy meter, connected to the three-phase four-wire direct-type electric energy meter interface through the power test line, for measuring the electric energy consumed in the three-phase four-wire circuit; A three-phase four-wire mutual inductance electric energy meter is connected to one end of a three-phase four-wire mutual inductance electric energy meter junction box through the electric power test line, and is used to measure the electric energy consumed in a three-phase four-wire circuit, wherein the other end of the three-phase four-wire mutual inductance electric energy meter junction box is connected to an outlet interface through the electric power test line; A single-phase electric energy meter, connected to the single-through electric energy meter interface via the electric power test line, for measuring the electric energy consumed in the single-phase circuit; An air switch, one end of which is connected to the air switch input interface through the power test line, and the other end of which is connected to the air switch output interface through the power test line, and is used to control the switches of the three-phase four-wire direct-type electric energy meter, the three-phase four-wire mutual inductance electric energy meter and the single-phase electric energy meter; The light emitting device is connected to the adjustable resistor through the power test line and is used to indicate the fault state of the circuit in the metering fault detection device.

2. The device according to claim 1, characterized in that The other end of the main switch is connected to the fuse through the power test line, and the fuse is connected to the power output port through the power test line, wherein the fuse is used to cut off the current.

3. The device according to claim 1, characterized in that A three-phase four-wire mutual inductance type energy meter interface is arranged below the three-phase four-wire mutual inductance type energy meter junction box.

4. The device according to claim 1, characterized in that The air switch output interface is connected to a fixed resistor through the power test line.

5. The device according to claim 1, characterized in that The air switch includes at least a first air switch, a second air switch and a third air switch, wherein the first air switch is used to control the power switch or the phase disconnect switch of the three-phase four-wire mutual inductance electric energy meter, the second air switch is used to control the power switch or the line disconnect switch of the three-phase four-wire direct-through electric energy meter, and the third air switch is used to control the power switch or the line disconnect switch of the single-phase electric energy meter.

6. The device according to claim 1, characterized in that The power test line includes a first power test line and a second power test line, and the device further includes: The current transformer is connected to the positive wiring port through the first power test line and is connected to the negative wiring port through the second power test line, and is used to monitor current changes.

7. The device according to claim 6, characterized in that The current transformer includes at least a first current transformer, a second current transformer and a third current transformer, wherein the first current transformer is connected to the first positive wiring port through the first power test line, and is connected to the first negative wiring port through the second power test line, the second current transformer is connected to the second positive wiring port through the first power test line, and is connected to the second negative wiring port through the second power test line, and the third current transformer is connected to the third positive wiring port through the first power test line, and is connected to the third negative wiring port through the second power test line.

8. The device according to any one of claims 1 to 7, characterized in that The device further comprises: a plurality of sliding resistors and a plurality of fixed resistors, wherein the sliding resistors are used to adjust the resistance value, and the fixed resistors are used to limit the current or voltage.

9. The device according to any one of claims 1 to 7, characterized in that The device further comprises: a power test line placement area for placing the power test line.

10. The device according to any one of claims 1 to 7, characterized in that The device is applied in anti-electricity theft training teaching scenarios.

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