CN114023131B - Measurement collection equipment troubleshooting training device - Google Patents

Abstract

The invention provides a metering acquisition equipment troubleshooting practical training device, which comprises at least one practical training module, wherein each practical training module comprises a meter, a normal collector, a fault collector, a wiring row, a first voltmeter, a second voltmeter and a fault switching module, wherein the fault switching module comprises a reset unit, an open-circuit fault simulation unit, an inverse fault simulation unit, a short-circuit fault simulation unit and a collector fault simulation unit, one side of the wiring row is connected with a communication end of the meter through a communication wire, and the other side of the wiring row is connected with the communication ends of the normal collector and the fault collector through communication wires respectively; the first voltmeter is connected with one side of the wiring row; the second voltmeter is connected with the other side of the wiring row; the fault simulation units are respectively used for realizing open-circuit fault simulation of the communication line, reverse fault simulation of the communication line, short-circuit fault simulation of the communication line and fault simulation of the collector; the reset unit is used for realizing fault recovery.

Description

Measurement collection equipment troubleshooting training device

Technical field

The invention relates to the technical field of maintenance of electricity collection equipment, and in particular to a troubleshooting training device for metering collection equipment.

Background technique

The electric power user information collection system (referred to as the power consumption system) is an important part of the smart grid construction. According to the overall requirements of the State Grid Corporation of China for smart grid construction, the construction of the electric power user information collection system must achieve "full coverage, full collection, and full coverage." The overall goal of cost control. At present, a large number of data collection equipment are put into operation. The daily operation and maintenance of these equipment has brought great pressure to the township power supply stations and involves many personnel. The collection and operation and maintenance work of township power supply stations is the basis for ensuring that line loss management meets the standards. In actual work, the Taiwan district manager’s response to unsuccessful collection is to “replace”, either the collector or the meter, without analyzing the cause of the failure. capacity, so that the fault cannot be eliminated even after replacing the meter and collector, resulting in a waste of manpower and material resources.

The existing simulation cabinets are complex in structure, and the setting of faults requires relevant software support, and requires professional training to operate them. And it is necessary to establish a simulation system similar to the procurement system as a support. Once the procurement system is updated and upgraded, huge sums of money must be spent to simultaneously upgrade the simulation library.

Contents of the invention

The present invention provides a measurement collection device to solve the technical problems of waste of manpower and material resources in the current operation and maintenance of the procurement system, and the existing procurement simulation cabinets are highly technical, have high purchase and later maintenance costs, and are only suitable for use by professional training units. The troubleshooting training device can implement practical training for procurement system operation and maintenance personnel through simple and easy-to-learn equipment, allowing operation and maintenance personnel to quickly improve their troubleshooting skills, ensure the reliable operation of the procurement system, and avoid blind replacement of equipment. and the waste of resources caused.

The technical solutions adopted by the present invention are as follows:

A troubleshooting training device for metering and collection equipment, including at least one training module. Each of the training modules includes a meter, a normal collector, a fault collector, a wiring strip, a first voltmeter, a second voltmeter and Fault switching module, the fault switching module includes a reset unit, an open circuit fault simulation unit, a reverse connection fault simulation unit, a short circuit fault simulation unit and a collector fault simulation unit, wherein the meter, the normal collector and The power terminals of the fault collector are all connected to power lines; one side of the terminal block is connected to the communication terminal of the meter through a communication line, and the other side of the terminal block is connected to the normal terminal through communication lines. The collector is connected to the communication end of the fault collector; the first voltmeter is connected to one side of the wiring strip; the second voltmeter is connected to the other side of the wiring strip; the open circuit fault The simulation unit, the reverse connection fault simulation unit, the short circuit fault simulation unit and the collector fault simulation unit are all set corresponding to the communication line on the other side of the wiring strip, so as to realize the communication line open circuit fault simulation respectively. , communication line reverse fault simulation, communication line short circuit fault simulation and collector fault simulation; the reset unit and the open circuit fault simulation unit, the reverse connection fault simulation unit, the short circuit fault simulation unit and the collector Fault simulation units are connected for fault recovery.

The measurement and collection equipment troubleshooting training device also includes a main switch module, and the main switch module is arranged corresponding to the power cord to enable opening and closing of the measurement and collection equipment troubleshooting training device.

The measurement and collection equipment troubleshooting training device includes two training modules, the meter in one of the training modules is a single-phase meter, and the meter in the other training module is a three-phase meter. surface.

The main switch module includes a first button, a second button and a first relay. The first button is a normally open button, the second button is a normally closed button, and the first relay is a three-contact normally open button. Relay, after the first button, the second button and the coil unit of the first relay are connected in series, one end is connected to the first phase line and the other end is connected to the neutral line. The switch unit of the first relay is arranged on on three phase lines.

The reset unit includes a third button, which is a normally closed button, and one end of the third button is connected to the first phase line.

The meter communicates with the normal collector and the fault collector through RS485. The communication end of the meter, the communication end of the normal collector and the communication end of the fault collector respectively include two ports. , the communication lines are two.

The open-circuit fault simulation unit includes a fourth button and a second relay. The fourth button is a normally open button. The second relay is a double-contact normally closed relay. The fourth button and the second relay are After the coil units are connected in series, one end is connected to the other end of the third button, and the other end is connected to the neutral line. The switch unit of the second relay is arranged on the other side of the wiring strip and the normal collector. communication between them.

The reverse connection fault simulation unit includes a fifth button and a third relay. The fifth button is a normally open button. The third relay is a double-contact switching relay. The fifth button and the third relay After the coil units are connected in series, one end is connected to the other end of the third button, and the other end is connected to the neutral line. Each communication line on one side of the switch unit of the third relay is divided into two static contacts. When the coil unit of the third relay is not energized, the state of the switch unit of the third relay is such that the communication lines on both sides of the switch unit of the third relay are connected properly. After the coil unit of the third relay is energized, , the state of the switching unit of the third relay causes the communication lines on both sides of the switching unit of the third relay to be reversely connected.

The short-circuit fault simulation unit includes a sixth button and a fourth relay. The sixth button is a normally open button. The fourth relay is a normally open relay. The coil unit of the sixth button and the fourth relay is connected in series. Finally, one end is connected to the other end of the third button, the other end is connected to the neutral line, and the fourth relay is provided on the two communication wires between the other side of the wiring strip and the normal collector. short wire.

The collector fault simulation unit includes a seventh button and a fifth relay. The seventh button is a normally open button. The fifth relay is a double-contact conversion relay. The seventh button and the fifth relay After the coil units are connected in series, one end is connected to the other end of the third button, the other end is connected to the neutral line, and the movable contact of the switch unit of the fifth relay is connected to the other side of the wiring strip. One set of static contacts of the switch unit of the fifth relay is connected to the normal collector, and another set of static contacts is connected to the fault collector. When the coil unit of the fifth relay is not energized, the The movable contacts of the switch unit of the fifth relay are closed with a set of static contacts of the switch unit of the fifth relay. After the coil unit of the fifth relay is energized, the switch unit of the fifth relay The movable contacts are closed with another set of static contacts of the switch unit of the fifth relay.

Beneficial effects of the present invention:

The invention sets up a meter, a normal collector, a fault collector, a wiring strip, a first voltmeter, a second voltmeter and a fault switching module, and uses the fault switching module to simulate communication line open circuit faults and communication line reverse faults. Switching between acquisition fault simulations such as simulation, communication line short-circuit fault simulation and collector fault simulation, thus enabling practical training of acquisition system operation and maintenance personnel through simple and easy-to-learn equipment, allowing operation and maintenance personnel to quickly improve their troubleshooting skills level to ensure the reliable operation of the procurement system and avoid the waste of resources caused by blind replacement of equipment.

Description of the drawings

Figure 1 is a block schematic diagram of a troubleshooting training device for metering and collection equipment according to an embodiment of the present invention;

Figure 2 is a block schematic diagram of a troubleshooting training device for metering and collection equipment according to one embodiment of the present invention;

Figure 3 is a partial structural schematic diagram of a troubleshooting training device for metering and collection equipment according to an embodiment of the present invention;

Figure 4 is a schematic structural diagram of another part of the troubleshooting training device for metering and collection equipment according to one embodiment of the present invention;

Figure 5 is a schematic diagram of the external structure after assembly of the measurement and collection equipment troubleshooting training device according to one embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

As shown in Figure 1, the measurement and collection equipment troubleshooting training device according to the embodiment of the present invention includes at least one training module 100. Each training module 100 includes a meter 10, a normal collector 20, a fault collector 30, and a wiring strip. 40. The first voltmeter 50, the second voltmeter 60 and the failover module 70. The failover module 70 includes a reset unit 71, an open circuit fault simulation unit 72, a reverse connection fault simulation unit 73, a short circuit fault simulation unit 74 and a collection unit. Device fault simulation unit 75, in which the power terminals of the meter 10, the normal collector 20 and the fault collector 30 are all connected to the power line; one side of the wiring strip 40 is connected to the communication end of the meter 10 through a communication line, and the wiring strip 40 is connected to the communication end of the meter 10 through a communication line. The other side of 40 is connected to the communication terminals of the normal collector 20 and the fault collector 30 respectively through communication lines; the first voltmeter 50 is connected to one side of the wiring strip 40; the second voltmeter 60 is connected to the other side of the wiring strip 40. The open-circuit fault simulation unit 72, the reverse connection fault simulation unit 73, the short-circuit fault simulation unit 74 and the collector fault simulation unit 75 are all set corresponding to the communication lines on the other side of the wiring strip 40, so as to realize the communication line open circuit respectively. Fault simulation, communication line reverse fault simulation, communication line short circuit fault simulation and collector fault simulation; reset unit 71 and open circuit fault simulation unit 72, reverse connection fault simulation unit 73, short circuit fault simulation unit 74 and collector fault simulation unit 75 Connected for failure recovery.

Further, as shown in Figure 2, the measurement and collection equipment troubleshooting training device according to the embodiment of the present invention may also include a main switch module 200. The main switch module 200 is configured corresponding to the power line to implement troubleshooting of the measurement and collection equipment. Opening and closing of practical training equipment.

In one embodiment of the present invention, as shown in Figures 3 and 4 (A and B in Figures 3 and 4 represent connection relationships, that is, point A in Figure 3 is connected to point A in Figure 4, and in Figure 3 Point B is connected to point B in Figure 4). The measurement and collection equipment troubleshooting training device includes two training modules. The meter 10 in one training module is a single-phase meter, and the meter 10 in the other training module is a single-phase meter. The meter 10 is a three-phase meter. The training module containing the single-phase meter can be used to simulate lighting users, and the training module containing the three-phase meter can be used to simulate power users.

As shown in Figures 3 and 4, the main switch module 200 may include a first button SB1, a second button SB2 and a first relay KM1. The first button SB1 is a normally open button, the second button SB2 is a normally closed button, and the first button SB1 is a normally open button, and the second button SB2 is a normally closed button. A relay KM1 is a three-contact normally open relay. After the first button SB1, the second button SB2 and the coil unit of the first relay KM1 are connected in series, one end is connected to the first phase line (such as U phase) and the other end is connected to the neutral line. N, the switching unit of the first relay KM1 is arranged on the three phase lines U, V, and W.

As shown in Figures 3 and 4, the reset unit 71 includes a third button SB3. The third button is a normally closed button, and one end of the third button SB3 is connected to the first phase line.

In one embodiment of the present invention, the meter 10 communicates with the normal collector 20 and the fault collector 30 through RS485. The communication end of the meter 10, the communication end of the normal collector 20 and the communication end of the fault collector 30 Each includes two ports and two communication lines (represented by a and b in the figure). The normal collector 20 and the fault collector 30 in the embodiment of the present invention are respectively a collector without a fault and a collector with a fault.

As shown in Figures 3 and 4, in the practical training module containing a single-phase meter, the open circuit fault simulation unit 72 includes a fourth button SB4 and a second relay KM2. The fourth button SB4 is a normally open button, and the second relay KM2 is In the double-contact normally closed relay, after the fourth button SB4 and the coil unit of the second relay KM2 are connected in series, one end is connected to the other end of the third button SB3, and the other end is connected to the neutral line N. The switch unit of the second relay KM2 is set at The communication line between the other side of the wiring strip 40 and the normal collector 20.

In the training module containing a three-phase meter, the fourth button is SB8 and the second relay is KM6. The connection relationship of each component is the same as that of the training module containing a single-phase meter.

As shown in Figures 3 and 4, in the practical training module containing a single-phase meter, the reverse fault simulation unit 73 includes a fifth button SB5 and a third relay KM3. The fifth button SB5 is a normally open button, and the third relay KM3 It is a double-contact conversion relay. After the fifth button SB5 and the coil unit of the third relay KM3 are connected in series, one end is connected to the other end of the third button SB3 and the other end is connected to the neutral line N. The switch unit of the third relay KM3 Each communication line on the side is divided into two static contacts. When the coil unit of the third relay KM3 is not energized, the state of the switch unit of the third relay KM3 makes the communication lines on both sides of the switch unit of the third relay KM3 connected properly. That is, line a is connected to line a, and line b is connected to line b. After the coil unit of the third relay KM3 is energized, the state of the switching unit of the third relay KM3 makes the communication lines on both sides of the switching unit of the third relay KM3 Reverse connection, that is, line a is connected to line b, and line b is connected to line a.

In the training module containing a three-phase meter, the fifth button is SB9 and the third relay is KM7. The connection relationship of each component is the same as that of the training module containing a single-phase meter.

As shown in Figures 3 and 4, in the practical training module containing a single-phase meter, the short-circuit fault simulation unit 74 includes a sixth button SB6 and a fourth relay KM4. The sixth button SB6 is a normally open button, and the fourth relay KM4 is For the normally open relay, after the coil units of the sixth button SB6 and the fourth relay KM4 are connected in series, one end is connected to the other end of the third button SB3 and the other end is connected to the neutral line N. The fourth relay KM4 is set on the other side of the terminal block 40 On the short wire of the two communication lines between the side and the normal collector 20. It should be understood that the fourth relay KM4 can be a single-contact relay, with the moving and static contacts connected in series on the short wire as two endpoints; it can also be a double-contact relay, with two moving contacts connected and two static contacts connected in series. The contacts are connected in series to the short wire as two endpoints.

In the training module containing a three-phase meter, the sixth button is SB10 and the fourth relay is KM8. The connection relationship of each component is the same as that of the training module containing a single-phase meter.

As shown in Figures 3 and 4, in the practical training module containing a single-phase meter, the collector fault simulation unit 75 includes the seventh button SB7 and the fifth relay KM5. The seventh button SB7 is a normally open button, and the fifth relay KM5 It is a double-contact conversion relay. After the seventh button SB7 and the coil unit of the fifth relay KM5 are connected in series, one end is connected to the other end of the third button SB3 and the other end is connected to the neutral line N. The switch unit of the fifth relay KM5 The moving contacts are connected to the other side of the terminal block 40. One set of static contacts of the switch unit of the fifth relay KM5 is connected to the normal collector 20, and the other set of static contacts is connected to the fault collector 30. In the fifth relay KM5 When the coil unit of KM5 is not energized, the movable contacts of the switch unit of the fifth relay KM5 are closed with a set of static contacts of the switch unit of the fifth relay KM5, that is, the normal collector 20 is connected to the other side of the wiring strip 40 After the coil unit of the fifth relay KM5 is energized, the movable contacts of the switch unit of the fifth relay KM5 are closed with another set of static contacts of the switch unit of the fifth relay KM5, that is, the fault collector 30 is connected to the wiring The other side of row 40 is connected.

In the training module containing a three-phase meter, the seventh button is SB11 and the fifth relay is KM9. The connection relationship of each component is the same as that of the training module containing a single-phase meter.

As shown in Figures 3 and 4, in the practical training module containing a single-phase meter, the symbols of the first voltmeter 50 and the second voltmeter 60 are DV1 and DV2 respectively. In the practical training module containing a three-phase meter, The symbols of the first voltmeter 50 and the second voltmeter 60 are DV3 and DV4 respectively.

The external structure of the above-mentioned measurement and collection equipment troubleshooting training device including two training modules after assembly is shown in Figure 5. Four voltmeters DV1 ~ DV4 are located on the upper part of the panel to display voltage changes under various types of faults. ; Three buttons SB1 ~ SB3 are located at the lower part of the panel, respectively used to control the opening of the measurement and collection equipment troubleshooting training device, the closing of the measurement and collection equipment troubleshooting training device, and the recovery of faults; the eight buttons SB4 ~ SB11 are located on the four sides. Under a voltmeter, it is used to switch various collection faults of single-phase meters and switch of various collection faults of three-phase meters.

When the measurement and acquisition equipment troubleshooting training device of any of the above embodiments is in use, the user can also use a handheld computer and a multimeter to conduct actual measurements, and combine the measured data with the current simulated fault, the data displayed by the voltmeter, etc. , to deepen the understanding of the differences between various types of faults.

In actual use, refer to Figure 3 and Figure 4 to understand that after the three-phase main power supply is turned on, press SB1 and KM1 will close to energize the single-phase meter, three-phase meter and each collector. At this time, KM2 ~ KM9 are in non-working state, and the RS485 communication line between the single-phase meter and the corresponding collector is not faulty. You can use the handheld computer to read the internal information of the meter (such as the meter address, etc.) through the infrared port of the normal collector. .

Press SB4, KM2 is closed, and the RS485 communication line between the single-phase meter and the normal collector is disconnected, thus simulating an open circuit fault of the on-site RS485 communication line. At this time, DV1 displays a voltage value of about +5V. Remove the RS485 communication line on one side of the wiring strip. At this time, DV2 displays a voltage value of 0V. The panel display is completed. The information of the single-phase meter cannot be read through the infrared port of the normal collector using a handheld computer. , use a multimeter to measure the voltage of the RS485 communication line and the communication end of the single-phase meter, and confirm the open circuit fault voltage value of the RS485 communication line. Press SB3, KM2 exits operation, and the RS485 communication line between the single-phase meter and the normal collector returns to normal.

Press SB5 and KM3 will be closed, so that the positions of the incoming and outgoing lines of KM3 are interchanged, simulating the on-site RS485 communication line's positive and negative connection fault. At this time, DV1 displays between minus 2.5 volts and plus 2.5V. Remove the RS485 communication line on one side of the wiring strip. At this time, DV2 displays a voltage value of -5V, which completes the panel display. It cannot be read through the normal collector infrared port using a handheld computer. For single-phase meter information, use a multimeter to measure the voltage of the RS485 communication line and the communication terminal of the single-phase meter to confirm the reverse connection fault voltage value of the RS485 communication line. Press SB3, KM3 exits operation, and the RS485 communication line between the single-phase meter and the normal collector returns to normal.

Press SB6, KM4 is closed, short-circuiting the KM4 incoming line, simulating a short-circuit fault in the on-site RS485 communication line. At this time, DV1 displays about minus 0V. Remove the RS485 communication line on one side of the wiring strip. At this time, DV2 displays a voltage value of about 0V. The panel display is completed. The single-phase meter information cannot be read through the normal collector infrared port with a handheld computer. Use Use a multimeter to measure the voltage of the RS485 communication line and the communication terminal of the single-phase meter to confirm the short-circuit fault voltage value of the RS485 communication line. Press SB3, KM4 exits operation, and the RS485 communication line between the single-phase meter and the normal collector returns to normal.

Press SB7 and KM5 is closed, switching the KM5 incoming line to the fault collector to simulate on-site collector failure. At this time, DV1 displays about minus 5V. Remove the RS485 communication line on one side of the wiring strip. At this time, DV2 displays a voltage value of about 5V. The panel display is completed. The meter information cannot be read through the infrared port of the fault collector using a handheld computer. Use a multimeter. Measure the voltage of the RS485 communication line and the communication terminal of the single-phase meter to confirm the fault voltage value of the collector. Press SB3, KM5 exits operation, and the single-phase meter switches back to communicating with the normal collector.

Through the above operations, switching between the four acquisition faults of the single-phase meter can be completed. In the same way, the acquisition fault simulation of the three-phase meter is similar to this and will not be repeated here.

After completing all training items, press SB2 and KM1 will exit operation, thus cutting off all power.

To sum up, according to the measurement and collection equipment troubleshooting training device according to the embodiment of the present invention, by setting the meter, the normal collector, the fault collector, the wiring strip, the first voltmeter, the second voltmeter and the fault switching module , through the fault switching module, the switching of acquisition fault simulations such as communication line open circuit fault simulation, communication line reverse connection fault simulation, communication line short circuit fault simulation and collector fault simulation can be realized through simple and easy-to-learn equipment. The practical training of system operation and maintenance personnel enables operation and maintenance personnel to intuitively feel the fault phenomenon, determine the cause of the fault, and experience the troubleshooting process, so that the operation and maintenance personnel can quickly improve their troubleshooting skills, ensure the reliable operation of the adopted system, and avoid accidents. Waste of resources caused by blindly replacing equipment.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. "Plural" means two or more, unless otherwise expressly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

In addition, each functional unit in various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present invention. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (5)

1. The practical training device for the metering acquisition equipment fault elimination is characterized by comprising at least one practical training module, wherein each practical training module comprises a meter, a normal collector, a fault collector, a wiring row, a first voltmeter, a second voltmeter and a fault switching module, and the fault switching module comprises a reset unit, an open-circuit fault simulation unit, an inverse fault simulation unit, a short-circuit fault simulation unit and a collector fault simulation unit, wherein the power ends of the meter, the normal collector and the fault collector are all connected to a power line; one side of the wiring row is connected with the communication end of the meter through a communication line, and the other side of the wiring row is connected with the communication ends of the normal collector and the fault collector through communication lines respectively; the first voltmeter is connected with one side of the wiring row; the second voltmeter is connected with the other side of the wiring row; the open-circuit fault simulation unit, the reverse-connection fault simulation unit, the short-circuit fault simulation unit and the collector fault simulation unit are arranged corresponding to the communication line on the other side of the wiring row and are respectively used for realizing open-circuit fault simulation of the communication line, reverse-connection fault simulation of the communication line, short-circuit fault simulation of the communication line and collector fault simulation; the resetting unit is connected with the open-circuit fault simulation unit, the reverse fault simulation unit, the short-circuit fault simulation unit and the collector fault simulation unit for realizing fault recovery,

the reset unit comprises a third button which is a normally closed button, one end of the third button is connected to the first phase line,

the open-circuit fault simulation unit comprises a fourth button and a second relay, wherein the fourth button is a normally open button, the second relay is a double-contact normally closed relay, after the fourth button is connected with a coil unit of the second relay in series, one end of the second relay is connected with the other end of the third button, the other end of the second relay is connected to a zero line, a switch unit of the second relay is arranged on a communication line between the other side of the wiring row and the normal collector,

the reverse connection fault simulation unit comprises a fifth button and a third relay, wherein the fifth button is a normally open button, the third relay is a double-contact conversion type relay, after the fifth button is connected with a coil unit of the third relay in series, one end of the third button is connected with the other end of the third button, the other end of the third button is connected to the zero line, each communication line at one side of a switch unit of the third relay is divided into two static contacts, when the coil unit of the third relay is not electrified, the state of the switch unit of the third relay enables the communication lines at two sides of the switch unit of the third relay to be connected positively, when the coil unit of the third relay is electrified, the state of the switch unit of the third relay enables the communication lines at two sides of the switch unit of the third relay to be connected reversely,

the short-circuit fault simulation unit comprises a sixth button and a fourth relay, wherein the sixth button is a normally open button, the fourth relay is a normally open relay, after the coil units of the sixth button and the fourth relay are connected in series, one end of the fourth relay is connected with the other end of the third button, the other end of the fourth relay is connected to the zero line, the fourth relay is arranged on a short circuit line of two communication lines between the other side of the wiring row and the normal collector,

the collector fault simulation unit comprises a seventh button and a fifth relay, wherein the seventh button is a normally open button, the fifth relay is a double-contact conversion type relay, after the seventh button and a coil unit of the fifth relay are connected in series, one end of the seventh button is connected with the other end of the third button, the other end of the seventh button is connected to the zero line, a movable contact of a switch unit of the fifth relay is connected to the other side of the wiring row, one group of fixed contacts of the switch unit of the fifth relay is connected to the normal collector, the other group of fixed contacts of the switch unit of the fifth relay is connected to the fault collector, when the coil unit of the fifth relay is not electrified, the movable contact of the switch unit of the fifth relay is closed with one group of fixed contacts of the switch unit of the fifth relay, and when the coil unit of the fifth relay is electrified, the movable contact of the switch unit of the fifth relay is closed with the other group of fixed contacts of the switch unit of the fifth relay.

2. The practical training device for metering and collecting equipment troubleshooting according to claim 1, further comprising a main switch module, wherein the main switch module is arranged corresponding to the power line and is used for realizing the starting and the stopping of the practical training device for metering and collecting equipment troubleshooting.

3. The practical training device for metering and collecting equipment according to claim 2, comprising two practical training modules, wherein the meter in one practical training module is a single-phase meter, and the meter in the other practical training module is a three-phase meter.

4. The practical training device for metering and collecting equipment fault removal according to claim 3, wherein the main switch module comprises a first button, a second button and a first relay, the first button is a normally open button, the second button is a normally closed button, the first relay is a three-contact normally open relay, after coil units of the first button, the second button and the first relay are connected in series, one end of the first button is connected to a first phase line, the other end of the first button is connected to a zero line, and the switch units of the first relay are arranged on three phase lines.

5. The practical training device for metering and collecting equipment troubleshooting according to claim 4, wherein the meter is in communication with the normal collector and the fault collector through RS485, and the communication end of the meter, the communication end of the normal collector and the communication end of the fault collector respectively comprise two ports, and the number of the communication lines is two.