CN111415546B

CN111415546B - Serial-type electric energy measurement emulation training device that works a telephone switchboard

Info

Publication number: CN111415546B
Application number: CN202010466551.2A
Authority: CN
Inventors: 贾宏伟; 黄进强; 赖茂松; 谢耀明; 单连秋; 钟汉勇; 邱民辉
Original assignee: Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd; Heyuan Power Supply Bureau of Guangdong Power Grid Co Ltd; Training and Evaluation Center of Guangdong Power Grid Co Ltd
Current assignee: Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd; Heyuan Power Supply Bureau of Guangdong Power Grid Co Ltd; Training and Evaluation Center of Guangdong Power Grid Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2022-03-29
Anticipated expiration: 2040-05-28
Also published as: CN111415546A

Abstract

The invention relates to the training field in power production, in particular to a series connection type electric energy metering simulation wiring training device. The training device comprises at least four operation panels, each operation panel comprises an electric energy metering device and a signal terminal row, an operator connects the signal terminal row by using a lead, the signal terminal row after connection is detected by a voltage metering module and a current metering module of the electric energy metering device, the condition of the electric energy metering electric power production field which possibly occurs can be set by the connection of the training device, the operator can judge the initial input voltage phase sequence by changing the input phase sequence of a signal source, the practical operation capability of the operator can be improved by the connection or detection of the operator, the working condition of the electric power production field is more approximate, and the technical problem that the requirements of training and examination of the practical operation of the operator cannot be really met in the prior art is solved.

Description

Serial-type electric energy measurement emulation training device that works a telephone switchboard

Technical Field

The invention relates to the training field in power production, in particular to a series connection type electric energy metering simulation wiring training device.

Background

At present, the power industry develops rapidly, and in order to ensure that the power industry produces and the electric energy metering can run safely, reliably, accurately and economically, the electric power industry must rely on instruments and meters which are arranged on the power production field and can measure electrical parameters such as voltage, current, power and electric energy. For operators in power production, the operators need to enter the field and can be officially put on duty only through a series of theoretical learning and actual operations, the theoretical learning can be generally obtained through teacher teaching, textbook reading and other learning modes, the actual operations can be learned, and as the opportunities of going to the field are few, the opportunities of directly contacting instrument equipment, wiring control and the like are fewer, so that the actual operations can be realized through a training device.

The safe, reliable and accurate measurement of electric energy must be ensured by means of instruments and meters for detecting electric parameters such as voltage, current, power factor, frequency and the like. Therefore, accurate collection of parameters and the correct form of wiring in the operation of electric energy metering are of the same importance as instrumentation. All the work needs electric energy metering personnel to complete, and the professional quality of the work is the greatest importance of the whole metering work. At present, most of the detection and verification work of electric energy metering is to perform analysis around an electric energy metering device, such as detection of a voltage transformer (TV or PT), a current transformer (TA or CT), an electric energy meter (active and reactive electric energy meters), and the like. However, whether any electric energy metering device detection is selected, the wiring correctness in the metering must be ensured, otherwise, the device cannot meter correctly even if the device is accurate. Because of carelessness in the installation and wiring processes of the electric energy meter for electric energy metering or unclear phase sequence and polarity of a current-voltage line, the electric energy meter is often connected in a wrong way, so that the electric energy meter cannot rotate, rotates reversely or rotates forwards and reversely suddenly, or the metering is wrong even if the electric energy meter rotates forwards all the time. Therefore, in the process of performing practical training, various situations should be simulated as much as possible, the existing training equipment is used for training and examining the electric energy metering by setting a wiring or fault type through a computer control circuit, but in the field work, many circuits are finished by manual wiring, so that the mode of setting the wiring or fault type by using the computer control circuit is greatly different from the field work, and the requirements of training and examining the practical operation of operators cannot be really met.

In summary, the manner of setting the wiring or fault type of the computer control circuit in the prior art is greatly different from the field work, and the technical problem that the requirements of training and checking the actual operation of the operator cannot be really met is solved.

Disclosure of Invention

The invention provides a series connection type electric energy metering simulation wiring training device, which is used for solving the technical problems that the mode of setting wiring or fault types of a computer control circuit in the prior art is greatly different from the on-site work, and the requirements of training and checking the actual operation of an operator cannot be really met.

The invention provides a series connection type electric energy metering simulation wiring training device which comprises at least four operation panels, the operation panel comprises an electric energy metering device and a signal terminal strip, the electric energy metering device comprises a voltage metering module and a current metering module, the signal terminal row comprises a voltage signal terminal group, a first current signal terminal group, a second current signal terminal group and a reference signal terminal, the set of voltage signal terminals includes three voltage signal terminals, the set of first current signal terminals includes a second signal terminal and a third signal terminal, the second current signal terminal group comprises a sixth signal terminal and a seventh signal terminal, the voltage metering module is connected with the three voltage signal terminals, the current metering module is connected between the second signal terminal and the third signal terminal and between the sixth signal terminal and the seventh signal terminal in series;

three voltage signal terminals of the voltage signal terminal group are respectively connected into an A phase voltage, a B phase voltage and a C phase voltage, the reference signal terminal is connected into any one of the A phase voltage, the B phase voltage and the C phase voltage, and the reference signal terminal is grounded or connected to zero;

the second signal terminal or the third signal terminal is connected to one of the A-phase current and the C-phase current, and the sixth signal terminal or the seventh signal terminal is connected to the other of the A-phase current and the C-phase current.

Preferably, the signal terminal rows on two adjacent operation panels form a group of wiring sets through conducting wires:

two reference signal terminals on two adjacent operation panels are connected through a lead;

between two adjacent operation panels, two voltage signal terminals on the first operation panel and two voltage signal terminals on the second operation panel are connected in series in a staggered manner, and a third voltage signal terminal on the first operation panel and a third voltage signal terminal on the second operation panel are connected in series in a counterpoint manner;

between four adjacent operation panels, the third signal terminal of the first operation panel and the third signal terminal of the second operation panel are connected in series through a conducting wire, the second signal terminal of the second operation panel and the seventh signal terminal of the third operation panel are connected in series through a conducting wire, the sixth signal terminal of the third operation panel and the seventh signal terminal of the fourth operation panel are connected in series through a conducting wire, the seventh signal terminal of the first operation panel and the sixth signal terminal of the second operation panel are connected in series through a conducting wire, the seventh signal terminal of the second operation panel and the second signal terminal of the third operation panel are connected in series through a conducting wire, the third signal terminal of the third operation panel and the third signal terminal of the fourth operation panel are connected in series through a conducting wire, and the signal terminal of the fourth operation panel outputting the phase current and the signal terminal accessing the phase current are connected in series through a conducting wire The signal terminal of the fourth operation panel for outputting the C-phase current is connected with the signal terminal connected with the C-phase current through a lead;

two groups of wiring sets between any three adjacent operation panels are different, and two groups of wiring sets between any three adjacent operation panels can be exchanged.

Preferably, the voltage signal terminal group comprises a first signal terminal, a fourth signal terminal and a fifth signal terminal, and the voltage metering module is connected in parallel to the first signal terminal and the fourth signal terminal and the fifth signal terminal;

the connection mode between the voltage signal terminals of two adjacent operation panels comprises the following steps:

the first signal terminal of the first operation panel is connected with the first signal terminal of the second operation panel, the fourth signal terminal of the first operation panel is connected with the fifth signal terminal of the second operation panel, and the fifth signal terminal of the first operation panel is connected with the fourth signal terminal of the second operation panel;

alternatively, the first and second electrodes may be,

the first signal terminal of the first operation panel is connected with the fourth signal terminal of the second operation panel, the fourth signal terminal of the first operation panel is connected with the first signal terminal of the second operation panel, and the fifth signal terminal of the first operation panel is connected with the fifth signal terminal of the second operation panel;

alternatively, the first and second electrodes may be,

the first signal terminal of the first operation panel is connected with the fifth signal terminal of the second operation panel, the fourth signal terminal of the first operation panel is connected with the fourth signal terminal of the second operation panel, and the fifth signal terminal of the first operation panel is connected with the first signal terminal of the second operation panel.

Preferably, the electric energy metering device comprises a three-phase two-element active electric energy meter, the electric energy meter comprises seven wiring terminals, the seven wiring terminals are respectively three voltage wiring terminals and two sets of current wiring terminals, the three voltage wiring terminals are respectively connected with a first signal terminal, a fourth signal terminal and a fifth signal terminal, one set of current wiring terminals is connected with a second signal terminal and a third signal terminal, and the other set of current wiring terminals is connected with a sixth signal terminal and a seventh signal terminal.

Preferably, the training device further comprises a joint junction box, the joint junction box comprises at least seven groups of connecting terminals and an external module for externally connecting the accessed circuit, each group of connecting terminals is provided with a connecting input terminal and a connecting output terminal in one-to-one correspondence, the external module is arranged between the connecting input terminal and the connecting output terminal, the connecting terminals of the electric energy meter are connected with the connecting input terminals of the joint junction box in one-to-one correspondence, and the connecting output terminals of the joint junction box are connected with three voltage signal terminals, a first current signal terminal and a second current signal terminal in one-to-one correspondence.

Preferably, the training device further comprises a control panel, wherein the control panel comprises a control switch set, and the A-phase voltage, the B-phase voltage, the C-phase voltage, the A-phase current and the C-phase current are connected into the control switch set;

the control switch group is used for controlling the connection or disconnection of a phase voltage on a first signal terminal of the first operating panel, the connection or disconnection of a phase voltage on a fourth signal terminal of the first operating panel, the connection or disconnection of a phase voltage on a fifth signal terminal of the first operating panel, the connection or disconnection of a phase current on a second signal terminal of the first operating panel and the connection or disconnection of a phase voltage on a sixth signal terminal of the first operating panel;

the first signal terminal of the first operation panel, the fourth signal terminal of the second operation panel, the fifth signal terminal of the third operation panel and the fifth signal terminal of the fourth operation panel are connected in series by a wire, the fourth signal terminal of the first operation panel, the first signal terminal of the second operation panel, the first signal terminal of the third operation panel and the fourth signal terminal of the fourth operation panel are connected in series by a wire, and the fifth signal terminal of the first operation panel, the fifth signal terminal of the second operation panel, the fourth signal terminal of the third operation panel and the first signal terminal of the fourth operation panel are connected in series by a wire.

Preferably, the control panel further includes a first input terminal to which the a-phase voltage is connected, a second input terminal to which the a-phase current is connected, a third input terminal, a fourth input terminal to which the B-phase voltage is connected, a fifth input terminal to which the C-phase voltage is connected, a sixth input terminal to which the C-phase current is connected, a seventh input terminal, and an eighth input terminal;

the control switch group comprises a current switch group and a voltage switch group, the voltage switch group comprises a first voltage switch group, a second voltage switch group, a third voltage switch group, a fourth voltage switch group, a fifth voltage switch group and a sixth voltage switch group, and the current switch group comprises a first current switch group, a second current switch group, a third current switch group, a fourth current switch group, a fifth current switch group, a sixth current switch group, a seventh current switch group and an eighth current switch group;

the first voltage switch group, the second voltage switch group, the third voltage switch group, the fourth voltage switch group, the fifth voltage switch group and the sixth voltage switch group comprise a first switch, a fourth switch and a fifth switch;

the first current switch group, the second current switch group, the third current switch group, the fourth current switch group, the fifth current switch group, the sixth current switch group, the seventh current switch group and the eighth current switch group respectively comprise a second switch, a third switch, a sixth switch and a seventh switch;

the first input terminal is connected with a first signal terminal of the first operation panel through a first switch of the first voltage switch group, the fourth input terminal is connected with a fourth signal terminal of the first operation panel through a fourth switch of the first voltage switch group, and the fifth input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the first voltage switch group;

the first input terminal is connected with a fourth signal terminal of the first operation panel through a fourth switch of the second voltage switch group, the fourth input terminal is connected with a first signal terminal of the first operation panel through a first switch of the second voltage switch group, and the fifth input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the second voltage switch group;

the first input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the third voltage switch group, the fourth input terminal is connected with a fourth signal terminal of the first operation panel through a fourth switch of the third voltage switch group, and the fifth input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the third voltage switch group;

the first input terminal is connected with the first signal terminal through a first switch of a fourth voltage switch group, the fourth input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the fourth voltage switch group, and the fifth input terminal is connected with a fourth signal terminal of the first operation panel through a fourth switch of the fourth voltage switch group;

the first input terminal is connected with a fourth signal terminal of the first operation panel through a fourth switch of a fifth voltage switch group, the fourth input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the fifth voltage switch group, and the fifth input terminal is connected with a first signal terminal of the first operation panel through a first switch of the fifth voltage switch group;

the first input terminal is connected with a fifth signal terminal of the first operation panel through a fifth switch of the sixth voltage switch group, the fourth input terminal is connected with the first signal terminal of the first operation panel through a first switch of the sixth voltage switch group, and the fifth input terminal is connected with a fourth signal terminal of the first operation panel through a fourth switch of the sixth voltage switch group;

the second input terminal is connected with the second signal terminal of the first operation panel through the second switch of the first current switch, and the sixth input terminal is connected with the sixth signal terminal of the first operation panel through the sixth switch of the first current switch;

the second input terminal is connected with the third signal terminal of the first operation panel through a third switch of the second current switch group, and the sixth input terminal is connected with the sixth signal terminal of the first operation panel through a sixth switch of the second current switch group;

the second input terminal is connected with the second signal terminal of the first operation panel through a second switch of the third current switch group, and the sixth input terminal is connected with the seventh signal terminal of the first operation panel through a seventh switch of the third current switch group;

the second input terminal is connected with the third signal terminal of the first operation panel through a third switch of a fourth current switch group, and the sixth input terminal is connected with the seventh signal terminal of the first operation panel through a seventh switch of the fourth current switch group;

the second input terminal is connected with a seventh signal terminal of the first operation panel through a seventh switch of the fifth current switch group, and the sixth input terminal is connected with a third signal terminal of the first operation panel through a third switch of the fifth current switch group;

the second input terminal is connected with a sixth signal terminal of the first operation panel through a sixth switch of a sixth current switch group, and the sixth input terminal is connected with a third signal terminal of the first operation panel through a third switch of the sixth current switch group;

the second input terminal is connected with a seventh signal terminal of the first operation panel through a seventh switch of the seventh current switch group, and the sixth input terminal is connected with a second signal terminal of the first operation panel through a second switch of the sixth current switch group;

the second input terminal is connected with a sixth signal terminal of the first operation panel through a sixth switch of the eighth current switch group, and the sixth input terminal is connected with a second signal terminal of the first operation panel through a second switch of the eighth current switch group;

the eighth input terminal is connected to the eighth signal terminal of the first operation panel.

Preferably, the connection group between the fourth operation panel of the previous training device and the first operation panel of the next training device of at least two training devices, two adjacent training devices, is: the first signal terminal of the fourth operation panel of the previous training set is connected with the first signal terminal of the first operation panel of the next training set, the second signal terminal of the fourth operation panel of the previous training set is connected with the second signal terminal of the first operation panel of the next training set, the fourth signal terminal of the fourth operation panel of the previous training set is connected with the fifth signal terminal of the first operation panel of the next training set, the fifth signal terminal of the fourth operation panel of the previous training set is connected with the fourth signal terminal of the first operation panel of the next training set, and the sixth signal terminal of the fourth operation panel of the previous training set is connected with the sixth signal terminal of the first operation panel of the next training set.

Preferably, the training apparatus further comprises an output terminal block;

the output terminal row comprises at least 8 output terminals, a first signal terminal of a fourth operation panel is connected with the first output terminal, a second signal terminal of the fourth operation panel is connected with the second output terminal, a fourth signal terminal of the fourth operation panel is connected with a fifth output terminal, a fifth signal terminal of the fourth operation panel is connected with the fifth output terminal, a sixth signal terminal of the fourth operation panel is connected with a sixth output terminal, a reference signal terminal is connected with an eighth output terminal, a seventh output terminal is connected with a third input terminal through a lead, and the third output terminal is connected with a seventh input terminal through a lead. .

Preferably, the cabinet body comprises an upper part and a lower part, the lower part is provided with at least eight input terminal interfaces for signal source access and at least eight output terminal interfaces for lead (signal line) access, the input terminal interfaces and the output terminal interfaces are arranged on the left side wall and the right side wall of the lower part of the cabinet body, and the front side surface and the rear side surface of the lower part of the cabinet body are provided with lower doors capable of being opened and closed;

the upper part of the cabinet body is provided with an upper door capable of being opened and closed through a first hinge, and the operating panel is arranged in the upper part of the cabinet body.

According to the technical scheme, the invention has the following advantages:

the invention discloses a serial electric energy metering simulation wiring training device, which comprises at least four operation panels, wherein each operation panel comprises an electric energy metering device and a signal terminal row, an operator connects the signal terminal rows by using a lead in the training and learning process, a voltage metering module and a current metering module of the electric energy metering device detect the signal terminals on the connected signal terminal rows, the operator calculates the voltage phase and the current phase of the current operation panel according to the measured data, whether the current connection is correct or not, the possible situations of an electric power production field of electric energy metering can be set by the wiring of the training device, and the operator can judge the initial input voltage phase sequence and the initial input current phase sequence by changing the input voltage phase sequence and the current phase sequence of a signal source, the conditions that the voltage phase sequence is unknown and the current signal is unclear in a production field can be effectively simulated, the actual operation capability of operators can be improved through wiring or detection of the operators, the working condition of the power production field is more approximate, and the technical problems that the mode of setting wiring or fault types of a computer control circuit in the prior art is greatly different from the field work, and the requirements of training and checking the actual operation of the operators cannot be really met are solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of an operation panel of a series-type electric energy metering simulation wiring training device according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a cabinet of a series type electric energy metering simulation wiring training device provided by an embodiment of the invention.

Fig. 3 is a schematic structural diagram of a control panel of a series-type electric energy metering simulation wiring training device according to an embodiment of the present invention.

Fig. 4 is a wiring diagram of a voltage signal terminal group of a series electric energy metering simulation wiring training device according to an embodiment of the present invention.

Fig. 5 is a wiring diagram of a first ground current signal terminal group and a second current signal terminal group of a series connection type electric energy metering simulation wiring training device according to an embodiment of the present invention.

Fig. 6 is a wiring diagram of a series type electric energy metering simulation wiring training device provided by an embodiment of the invention when six operation panels are used.

Fig. 7 is a wiring diagram of a series connection type electric energy metering simulation wiring training device provided with an input terminal group and an output terminal group according to an embodiment of the invention.

Fig. 8 is a wiring diagram of a voltage switch group of a series-connection type electric energy metering simulation wiring training device according to an embodiment of the invention.

Fig. 9 is a wiring diagram of a current switch group of a series connection type electric energy metering simulation wiring training device according to an embodiment of the invention.

In the figure:

1. a cabinet body; 2. a door is arranged; 3. a lower door; 4. an output terminal interface; 5. an operation panel; 51. an electric energy metering device; 10. a control panel; 511. a voltage metering module; 512. a current metering module; 5111. a first connection terminal; 5112. a fourth connection terminal; 5113. a fifth connection terminal; 5114. a second connection terminal; 5115. a third connection terminal; 5116. a sixth connection terminal; 5117. a seventh connection terminal; 52. a joint junction box; 521. connecting the module externally; 522. a connection terminal; 53. a signal terminal row; 531. a first signal terminal; 532. a fourth signal terminal; 533. a fifth signal terminal; 534. a second signal terminal; 535. a third signal terminal; 536. a sixth signal terminal; 537. a seventh signal terminal; 538. a reference signal terminal; 54. a first operation panel; 55. a second operation panel; 56. a third operation panel; 57. a fourth operation panel; 58. a fifth operation panel; 59. a sixth operation panel; 510. an output terminal row; 111. a first voltage switch group; 112. a second voltage switch group; 113. a third voltage switch group; 114. a fourth voltage switch group; 115. a fifth voltage switch group; 116. a sixth voltage switch group; 161. a voltage phase sequence indicator light; 121. a first current switch group; 122. a second current switch group; 123. a third current switch group; 124. a fourth current switch group; 125. a fifth current switch group; 125. a sixth current switch group; 127. a seventh current switch group; 128. an eighth current switch group; 162. a current phase sequence indicator light; 201. a first input terminal; 202. a second input terminal; 203. a third input terminal; 204. a fourth input terminal; 205. a fifth input terminal; 206. a sixth input terminal; 207. a seventh input terminal; 208. an eighth input terminal.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, 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, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 9, in order to express the relationship between the wirings clearly, the signal terminals, the input terminal, and the output terminal of fig. 4 to 7 are adjusted in the order of the first signal terminal, the second signal terminal, the third signal terminal, the fourth signal terminal, the fifth signal terminal, and the sixth signal terminal to the seventh signal terminal.

The invention provides a series connection type electric energy metering simulation wiring training device which comprises a cabinet body 1, an operation panel 5 and a control panel 10, wherein the cabinet body 1 comprises an upper part of the cabinet body 1 and a lower part of the cabinet body 1, at least eight input terminal interfaces for connecting wires (signal sources) and at least eight output terminal interfaces 4 for connecting the wires (signal sources) are arranged at the lower part of the cabinet body 1, and the signal sources are three-phase power supplies. The input terminal interface and the output terminal interface 4 can be arranged on the same side wall of the lower part of the cabinet body 1, and also can be arranged on different side walls of the lower part of the cabinet body 1, and enough space is reserved for the next cabinet body 1 to be placed when the input terminal interface and the output terminal interface are arranged on different side walls to be convenient for the cabinet bodies 1 to be connected. Two sides around the cabinet body 1 lower part are provided with lower door 3, and the operating personnel of being convenient for connects the wire in the cabinet body 1. An upper door 2 which can be opened and closed is installed at the upper part of the cabinet body 1 through a first hinge, and a first door handle is arranged on the upper door 2; at least four operation panels 5 are arranged in the upper part of the cabinet body 1, the upper doors 2 correspond to the operation panels 5 one by one, namely, one operation panel 5 is arranged at each upper door 2; at least four operating panel 5 can be horizontal equipartition set up in 1 upper portion of the cabinet body, also can encircle through certain angle and arrange on 1 upper portion of the cabinet body, four at least operating panel 5 can reduce the occupation space of the cabinet body 1 through encircleing arranging, the mode that horizontal equipartition set up in 1 upper portion of the cabinet body is convenient for unpack apart and carries out the wiring. The operation panel 5 can also be directly arranged on the door, and the operation panel 5 can be connected by opening the door, so that the operation panel is convenient and quick to use and convenient to check. In this embodiment, a rectangular cabinet body 1 is specifically adopted, an input terminal interface is arranged on the left side surface of the lower part of the cabinet body 1, an output terminal interface 4 of the cabinet body 1 is arranged on the right side surface of the lower part of the cabinet body 1, and the input terminal interface and the output terminal interface 4 respectively include a voltage interface for accessing three voltage signal lines, a voltage interface for accessing two current signal lines, and a reference interface for accessing one reference line; the operation panel 5 is four, corresponds to four sides on the cabinet body 1 upper portion respectively, all is equipped with the door on four sides, is equipped with first door handle on the door, and four operation panel 5 set up corresponding to the door of four sides respectively, and operating personnel need control or when detecting which operation panel 5 in the training process, open the door of this operation panel 5's correspondence, alright control the detection to this operation panel 5. The operation panel 5 is rotatably installed on the upper portion of the cabinet body 1 through a second hinge, a second door handle is arranged on the operation panel 5, the operation panel 5 can be opened by pulling the second door handle, and wiring can be conducted on the back of the operation panel 5 when the operation panel is seen. The control panel 10 can be installed on the side surface of the upper part of the cabinet body 1, or any outer surface of the upper door, so that the operation and wiring positions are convenient,

the operating panel 5 comprises an electric energy meter, a signal terminal row 53 and a joint junction box 52, the electric energy meter is preferably a three-phase two-element active electric energy meter, the three-phase two-element active electric energy meter has seven connecting terminals, 48 connection types can be connected, and only one of the 48 connection types can realize correct metering detection. Because of carelessness in the installation and wiring processes of the electric energy meter or unclear phase sequence and polarity of a current and voltage line, the electric energy meter is often connected in a wrong way, so that the electric energy meter cannot rotate, rotates reversely or rotates forwards or rotates reversely suddenly, or even if the electric energy meter rotates forwards all the time, metering is wrong. The electric energy meter may also be an electric energy metering device 51 or other metering device that performs the same function of detecting current and voltage, respectively. The signal terminal strip of the operation panel can be arranged on the back of the operation panel, the wire passing holes are formed in the operation panel, the signal terminal strip on the back is connected with a wire between the combined junction box and the electric energy meter and penetrates through the wire passing holes, so that the signal terminal strip and the combined junction box or the electric energy meter can be connected, and the signal terminal strip, the combined junction box and the electric energy meter can be directly arranged on the front, so that the signal terminal strip can be connected with the combined junction box or the electric energy meter conveniently.

The electric energy metering device 51 comprises a current metering module 512 and a voltage metering module 511, the electric energy metering device 51 has seven terminals in total, the voltage metering module 511 includes three voltage terminals, the three voltage connection terminals are a first connection terminal 5111, a fourth connection terminal 5112 and a fifth connection terminal 5113, the voltage metering module 511 is configured to detect a voltage between any two of the first connection terminal 5111, the fourth connection terminal 5112 and the fifth connection terminal 5113, the current metering module 512 comprises two sets of current terminals, the two sets of current terminals are respectively a first current terminal set and a second current terminal set, the first group of connection terminals includes a second connection terminal 5114 and a third connection terminal 5115, the second current connection terminal group includes a sixth connection terminal 5116 and a seventh connection terminal 5117. The current metering module 512 is configured to detect current flowing between the first current terminal set and between the second current terminal set. The voltage metering module can realize measurement for one or more voltmeters through a switch control device combination, and the current metering device can realize detection for two current meters in a combination mode.

The signal terminal row 53 includes at least 8 signal terminals, the signal terminal row 53 in this embodiment is set to 8, the 8 signal terminals include a voltage signal terminal group and two current signal terminal groups and a reference signal terminal 538, the voltage signal terminal group includes three voltage signal terminals, wherein the three voltage signal terminals are a first signal terminal 531, a fourth signal terminal 532 and a fifth signal terminal 533 respectively; the two sets of current signal terminal sets include a first current signal terminal set including a second signal terminal 534 and a third signal terminal 535 and a second current signal terminal set including a sixth signal terminal 536 and a seventh signal terminal 537; the reference signal terminal may be grounded or grounded.

The combined junction box 52 comprises at least seven groups of connecting terminals 522 and an external module 521 for externally connecting an accessed circuit, each group of connecting terminals 522 comprises a connecting input terminal and a connecting output terminal in one-to-one correspondence, the external module 521 is arranged between the connecting input terminal and the connecting output terminal, the connecting terminals of the electric energy meter are connected with the connecting input terminals of the combined junction box 52 in one-to-one correspondence, and the connecting output terminals of the combined junction box 52 are connected with three voltage signal terminals, a second signal terminal 534, a third signal terminal 535, a sixth signal terminal 536 and a seventh signal terminal 537 in one-to-one correspondence.

That is, a signal inputted from the connection input terminal, and the corresponding connection output terminal can output the same signal.

Three voltage signal terminals of the voltage signal terminal group are respectively and correspondingly connected with three connection input terminals of the joint junction box 52 through wires, specifically, the first signal terminal 531, the fourth signal terminal 532 and the fifth signal terminal 533 are respectively and correspondingly connected with three connection input terminals of the joint junction box 52, three connection output terminals corresponding to three connection input terminals of the joint junction box 52 of the connection voltage signal terminal group are respectively and correspondingly connected with three voltage connection terminals on the voltage metering module 511, specifically, the first signal terminal 531 is connected with a first connection input terminal on the joint junction box 52 through a wire, and a first connection output terminal corresponding to the first connection input terminal is connected with the first connection terminal 5111 through a wire; the fourth signal terminal 532 is connected to a fourth connection input terminal on the joint junction box 52 through a wire, and a fourth connection output terminal corresponding to the fourth connection input terminal is connected to the fourth connection terminal 5112 through a wire; the fifth signal terminal 533 is connected to the fifth connection input terminal of the joint terminal box 52 by a wire, and the fifth connection output terminal corresponding to the fifth connection input terminal is connected to the fifth connection terminal 5113 by a wire.

The second signal terminal 534 or the third signal terminal 535 in the first current signal terminal group is connected to the second connection input terminal on the joint terminal box 52 by a wire, the second connection output terminal corresponding to the second connection input terminal is connected to the second connection terminal 5114 or the third connection terminal 5115 of the first current terminal group by a wire, for more definite correspondence to facilitate connection, the second signal terminal 534 is connected to the second connection input terminal, and the second connection output terminal is connected to the second connection terminal 5114.

The sixth signal terminal 536 or the seventh signal terminal 537 in the second current signal terminal group is connected to the sixth connection input terminal on the joint terminal box 52 by a wire, the sixth connection output terminal corresponding to the sixth connection input terminal is connected to the sixth connection terminal 5116 or the seventh connection terminal 5117 of the second current terminal group by a wire, and for more specific correspondence to connection, the sixth signal terminal 536 is connected to the sixth connection input terminal, and the sixth connection output terminal is connected to the sixth connection terminal 5116.

The combined junction box 52 has the advantages that in an electric power system, when the electric energy meter is replaced or overhauled, due to the fact that the three-phase circuit cannot be directly powered off, the electric energy meter is replaced and overhauled under the condition that the three-phase circuit is not powered off through the transfer switch or the external module 521 in the combined junction box 52, the combined junction box 52 is arranged in a training box, the replacement condition of the electric energy meter can be simulated in a corresponding field more truly, operators can conveniently and quickly know the combined junction box 52, and the on-site condition can be simulated and overhauled truly and specifically.

In the training process, the condition of neglecting to overhaul the electric energy meter can be considered, that is, the operation panel 5 may not be provided with the joint junction box 52, specifically: the first signal terminal 531 is connected to the first connection terminal 5111 through a conductive wire, the second signal terminal 534 is connected to the second connection terminal 5114 through a conductive wire, the fourth signal terminal 532 is connected to the fourth connection terminal 5112 through a conductive wire, the fifth signal terminal 533 is connected to the fifth connection terminal 5113 through a conductive wire, and the sixth signal terminal 536 is connected to the sixth connection terminal 5116 through a conductive wire.

In this embodiment, no adjustment is required for connection between the electric energy meter and the signal terminal row 53, and the first connection terminal 5111, the second connection terminal 5114, the third connection terminal 5115, the fourth connection terminal 5112, the fifth connection terminal 5113, the sixth connection terminal 5116, and the seventh connection terminal 5117 of the electric energy metering device 51 correspond to the first signal terminal 531, the second signal terminal 534, the third signal terminal 535, the fourth signal terminal 532, the fifth signal terminal 533, the sixth signal terminal 536, and the seventh signal terminal 537 of the signal terminal row 53 respectively and are the same terminal. That is, the first connection terminal 5111 and the first signal terminal 531 are the same terminal, the second connection terminal 5114 and the second signal terminal 534 are the same terminal, the third connection terminal 5115 and the third signal terminal 535 are the same terminal, the fourth connection terminal 5112 and the fourth signal terminal 532 are the same terminal, the fifth connection terminal 5113 and the fifth signal terminal 533 are the same terminal, the sixth connection terminal 5116 and the sixth signal terminal 536 are the same terminal, and the seventh connection terminal 5117 and the seventh signal terminal 537 are the same terminal, the first signal terminal 531, the second signal terminal 534, the third signal terminal 535, the fourth signal terminal 532, the fifth signal terminal 533, the sixth signal terminal 536 and the seventh signal terminal 537 are directly disposed on the operation panel 5, which means that the signal terminal row 53 and the electric energy metering device 51 are already connected, the voltage or current is directly applied to the signal terminal strip 53, so that the power metering device 51 can be directly switched on for detection. The voltage metering module is connected with three voltage signal terminals, specifically, the voltage metering module 511 is respectively connected in parallel to the first signal terminal 531 and the fourth signal terminal 532 and the fifth signal terminal 533, the voltage metering module can be two voltmeters, or one voltmeters switched by a switch, and can respectively measure the voltage between the first signal terminal 531 and the fourth signal terminal 532 and the voltage between the fourth signal terminal 532 and the fifth signal terminal 533; the current metering module 512 is connected in series between the second signal terminal 534 and the third signal terminal 535 and between the sixth signal terminal 536 and the seventh signal terminal 537, respectively. The voltage metering modules 511 are respectively connected in parallel to any two of the three voltage signal terminals, and the current metering modules 512 are respectively connected in series between the second signal terminal 534 and the third signal terminal 535 and between the sixth signal terminal 536 and the seventh signal terminal 537. The current metering module may be two current meters or one current meter switched by a switch for measuring a current signal between the second signal terminal 534 and the third signal terminal 535 and a current signal between the sixth signal terminal 536 and the seventh signal terminal 537.

The three voltage signal terminals of the voltage signal terminal group are respectively connected with an A-phase voltage, a B-phase voltage and a C-phase voltage, the reference signal terminal 538 is connected with any one of the A-phase voltage, the B-phase voltage and the C-phase voltage, and the reference signal terminal 538 is grounded or connected to zero;

the first signal terminal 531, the fourth signal terminal 532 and the fifth signal terminal 533 can be connected to any one of a-phase voltage, a B-phase voltage and a C-phase voltage, and the phase voltages connected to the first signal terminal 531, the fourth signal terminal 532 and the fifth signal terminal 533 in the same signal terminal row 53 are all phase voltages which are not in phase; for example: the first signal terminal 531 receives an a-phase voltage, the fourth signal terminal 532 receives a B-phase voltage, and the fifth signal terminal 533 receives a C-phase voltage.

The second signal terminal 534 or the third signal terminal 535 is connected to either one of the a-phase current and the C-phase current, and the sixth signal terminal 536 or the seventh signal terminal 537 is connected to the other one of the a-phase current and the C-phase current.

The phase current input by the first current signal terminal group and the phase current input by the second current signal terminal group are phase currents of different phases, the A-phase voltage, the B-phase voltage and the C-phase voltage are correspondingly connected into three voltage signal terminals respectively, any one of the A-phase voltage, the B-phase voltage and the C-phase voltage is connected into a reference signal terminal 538, and the reference signal terminal 538 is grounded or connected to zero; for example: the first current signal terminal set inputs A-phase current, and the second current signal terminal set inputs C-phase current. When any one of the phase current of the A-phase and the C-phase is connected to the second signal terminal 534 or the third signal terminal 535, and when any one of the second signal terminal 534 and the third signal terminal 535 is connected to the phase current, the other signal terminal outputs the phase current; for example: the second signal terminal 534 inputs a-phase current, and the third signal terminal 535 outputs a-phase current; when any one of the phase current of the a-phase and the C-phase is connected to the sixth signal terminal 536 or the seventh signal terminal 537, and when any one of the sixth signal terminal 536 and the seventh signal terminal 537 is connected to the phase current, the other signal terminal outputs the phase current. For example, when the C-phase current is input to the sixth signal terminal 536, the seventh signal terminal 537 outputs the C-phase current.

An operator can learn various wiring types of electric energy measurement which may be met in an electric power production field according to the wiring of the training device provided by the embodiment or the adjustment of the current phase sequence and the voltage phase sequence of the input signal source, wherein the 48 wiring types exist, the wiring and detection processes of the operator in the training process are the same as those of the electric power production field, the operator can directly and manually perform wiring, the manual operation capability of the operator is improved, and compared with a computer simulation mode in the prior art, the training of wiring and detection is realized only by controlling a switch valve, the training device can better ensure that the operator can be in direct contact with the condition consistent with the working condition of the electric power production field, the practical operation level of the operator can be more effectively improved, and manual operation can be truly performed instead of sensory recognition through computer simulation.

The signal terminal rows 53 on two adjacent operation panels 5 form a group of wiring sets through conducting wires:

the two reference signal terminals 538 on the adjacent two operation panels 5 are connected in series by a wire;

between two adjacent operation panels 5, two voltage signal terminals on the first operation panel 5 and two voltage signal terminals on the second operation panel 5 are connected in series in a staggered manner, and the other voltage signal terminal on the first operation panel 5 and the other voltage signal terminal on the second operation panel 5 are connected in series in a contraposition manner; the connection mode of counterpoint is that the signal terminal of same position interconnects, for example: the connection between the first signal terminal 531 of the first operating panel 54 and the first signal terminal of the second operating panel 55 is an alignment connection, and the connection manner of the misalignment is that the signal terminals at two different positions are connected in a mutually-misaligned manner; for example: the fourth signal terminals 532 of the first operation panel 54 are connected to the fifth signal terminals 533 of the second operation panel 55, and the fifth signal terminals 533 of the first operation panel 54 are connected to the fourth signal terminals 532 of the second operation panel 55, that is, they are connected in a staggered manner. The other voltage signal terminal refers to a third voltage signal terminal except for two voltage signal terminals connected in series with a misalignment among the three voltage signal terminals.

Wherein, the connected mode between the voltage signal terminal of two adjacent operation panels includes:

the first signal terminal 531 of the first operation panel is connected to the first signal terminal 531 of the second operation panel, the fourth signal terminal 532 of the first operation panel is connected to the fifth signal terminal 533 of the second operation panel, and the fifth signal terminal 533 of the first operation panel is connected to the fourth signal terminal 532 of the second operation panel;

alternatively, the first and second electrodes may be,

the first signal terminal 531 of the first operation panel is connected to the fourth signal terminal 532 of the second operation panel, the fourth signal terminal 532 of the first operation panel is connected to the first signal terminal 531 of the second operation panel, and the fifth signal terminal 533 of the first operation panel is connected to the fifth signal terminal 533 of the second operation panel;

alternatively, the first and second electrodes may be,

the first signal terminal 531 of the first operation panel is connected to the fifth signal terminal 533 of the second operation panel, the fourth signal terminal 532 of the first operation panel is connected to the fourth signal terminal 532 of the second operation panel, and the fifth signal terminal 533 of the first operation panel is connected to the first signal terminal 531 of the second operation panel.

Between the adjacent four operation panels 5, the third signal terminal 535 of the first operation panel 5 and the third signal terminal 535 of the second operation panel 5 are connected in series by a wire, the second signal terminal 534 of the second operation panel 55 and the seventh signal terminal 537 of the third operation panel 5 are connected in series by a wire, the sixth signal terminal 536 of the third operation panel 56 and the seventh signal terminal 537 of the fourth operation panel 5 are connected in series by a wire, the seventh signal terminal 537 of the first operation panel 5 and the sixth signal terminal 536 of the second operation panel 5 are connected in series by a wire, the seventh signal terminal 537 of the second operation panel 5 and the second signal terminal 534 of the third operation panel are connected in series by a wire, the third signal terminal 535537 of the third operation panel 5 and the third signal terminal of the fourth operation panel 5 are connected in series by a wire, the signal terminal of the last operation panel 5 outputting the phase A current is connected with the signal terminal accessing the phase A current through a lead, and the signal terminal of the last operation panel 5 outputting the phase C current is connected with the signal terminal accessing the phase C current through a lead;

two groups of wiring sets between any three adjacent operation panels 5 are different, and two groups of wiring sets between any three adjacent operation panels 5 can be exchanged. When the two sets of wiring sets between any three adjacent operation panels 5 are identical, the same voltage phase sequence and current signals appear on the first operation panel 5 and the third operation panel 5. The 48 wiring types cannot be completely set.

The control panel 10 comprises a control switch set, and a phase voltage A, a phase voltage B, a phase voltage C, a phase current A and a phase current C are connected into the control switch set;

the operation panels include a first operation panel 54, a second operation panel 55, a third operation panel 56 and a fourth operation panel, the control switch sets are used for controlling the connection or disconnection of the phase voltage on the first signal terminal 531 of the first operation panel 54, the connection or disconnection of the phase voltage on the fourth signal terminal 532 of the first operation panel 54, the connection or disconnection of the phase voltage on the fifth signal terminal 533 of the first operation panel 54, the connection or disconnection of the phase current on the second signal terminal 534 of the first operation panel 54 and the connection or disconnection of the phase voltage on the sixth signal terminal 536 of the first operation panel 54;

the four voltage signal terminal groups on the operation panel 5 are connected in series through a wire, the four operation panels 5 are respectively a first operation panel 54, a second operation panel 55, a third operation panel 56 and a fourth operation panel 57, the four operation panels 5 are connected through a wire, and the specific connection mode is as follows: the a-phase voltage is connected to the first signal terminal 531 of the first operating panel 54, the B-phase voltage is connected to the fourth signal terminal 532 of the first operating panel 54, the C-phase current is connected to the fifth signal terminal 533 of the first operating panel 54, the a-phase current is connected to the second signal terminal 534 of the first operating panel 54, and the C-phase current is connected to the sixth signal terminal 536 of the first operating panel 54; the first signal terminal 531 of the first operation panel 54, the fourth signal terminal 532 of the second operation panel 55, the fifth signal terminal 533 of the third operation panel 56, and the fifth signal terminal 533 of the fourth operation panel 57 are connected in series by a wire, the fourth signal terminal 532 of the first operation panel 54, the first signal terminal 531 of the second operation panel 55, the first signal terminal 531 of the third operation panel 56, and the fourth signal terminal of the fourth operation panel 57 are connected in series by a wire, and the fifth signal terminal 533 of the first operation panel 54, the fifth signal terminal 533 of the second operation panel 55, the fourth signal terminal 532 of the third operation panel 56, and the first signal terminal of the fourth operation panel 57 are connected in series by a wire. The reference signal terminal 538 on the first operating panel 54, the reference signal terminal 538 on the second operating panel 55, the reference signal terminal 538 on the third operating panel 56 and the reference signal terminal 538 on the fourth operating panel 57 are connected in series, the B-phase voltage is connected with a reference signal line and used for determining the position of the B-phase voltage on the coordinates, the voltage between the operating panels 5 measured by the voltage metering module 511 can obtain the relative phase sequence among the a-phase voltage, the B-phase voltage and the C-phase voltage, and the absolute phase sequence among the a-phase voltage, the B-phase voltage and the C-phase voltage can be obtained by determining the position of the B-phase voltage on the coordinates. In the present embodiment, the voltage phase sequence of the first operating panel 54 is abc, the voltage phase sequence of the second operating panel 55 is bac, the voltage phase sequence of the third operating panel 56 is bca, and the voltage phase sequence of the fourth operating panel 57 is cba, by exchanging signal terminals among the a-phase voltage, the B-phase voltage, and the C-phase voltage that are connected to the first operating panel 54, for example, the C-phase voltage is connected to the first signal terminal 531 of the first operating panel 54, the B-phase voltage is connected to the fifth signal terminal 533 of the first operating panel 54, and the a-phase voltage is connected to the fourth signal terminal 532 of the first operating panel 54, the voltage phase sequence of the first operating panel 54 is cab, the voltage phase sequence of the second operating panel 55 is acb, the voltage phase sequence of the third operating panel 56 is abc, and the phase sequence of the fourth operating panel 57 is bac. The voltage signal terminal group of the first operation panel 54 is accessed through different voltage phase sequences, the conditions of six different voltage phase sequences can be simulated, and operators can quickly know the change of the six different voltage phase sequences in the training and examination process, and can perform wiring by manual operation and input the phase sequence of the first operation panel 54.

Preferably, when the number of the operation panels 5 is six, a fifth operation panel 5 and a sixth operation panel 59 are added to the four operation panels 5, the first signal terminal 531 of the fourth operation panel 57, the first signal terminal 531 of the fifth operation panel 58 and the fourth signal terminal 532 of the sixth operation panel 59 are connected in series by a wire, the fourth signal terminal 532 of the fourth operation panel 57, the fifth signal terminal 533 of the fifth operation panel 58 and the first signal terminal 531 of the sixth operation panel 59 are connected in series by a wire, the fifth signal terminal 533 of the fourth operation panel 57, the fourth signal terminal 532 of the fifth operation panel 58 and the fifth signal terminal 533 of the sixth operation panel 59 are connected in series by a wire, the a-phase voltage and the B-phase voltage are inputted to the voltage signal terminal group of the first operation panel 54, the C-phase voltage can present six types of voltage phase sequences, namely abc, bac, bca, cba, cab and acb, on the first operating panel 54 to the sixth operating panel 59, and an operator can set one-time wiring through one signal source to present six types of voltage phase sequences on the six operating panels 5, wherein the voltage phase sequence abc is correct, and the others belong to a fault phase sequence, so that the operator can quickly recognize the fault phase sequence in actual work. When the test is required, the test can be performed quickly, and six voltage signal terminal groups are connected to six operation panels 5 through leads to connect the six voltage phase sequence types. In the device of the present embodiment, during the examination, the voltage phase sequence of the voltage signal terminal group connected to the first operation panel 54 is not presented, and the voltage phase sequence of the voltage signal terminal group of the first operation panel 54 is initially determined by connecting each operation panel 5 and then detecting the voltage phase sequence of each operation panel 5.

The number of the training devices of the present embodiment may also be two, the two training devices are a first training device and a second training device, and the six operation panels 5 may be composed of the first training device and the second training device, wherein the first operation panel 54 to the fourth operation panel 57 are the first training device, and the fifth operation panel 58 and the sixth operation panel 59 are both provided in the second training device, that is, the connection between the first training device and the second training device is realized by the connection between the fourth operation panel 57 and the fifth operation panel 58.

The a-phase current is connected to the second signal terminal 534 of the first operation panel 54, the C-phase current is connected to the sixth signal terminal 536 of the first operation panel 54, the third signal terminal 535 of the first operation panel 54 and the third signal terminal 535 of the second operation panel 55 are connected in series by a wire, the second signal terminal 534 of the second operation panel 55 and the seventh signal terminal 537 of the third operation panel 56 are connected in series by a wire, and the seventh signal terminal 537 of the third operation panel 56 and the sixth signal terminal 536 of the fourth operation panel 57 are connected; the seventh signal terminal 537 of the first operation panel 54 and the seventh signal terminal 537 of the second operation panel 55 are connected to each other by a wire, the sixth signal terminal 536 of the second operation panel 55 and the second signal terminal 534 of the third operation panel 56 are connected by a wire, the third signal terminal 535 of the third operation panel 56 and the third signal terminal 535 of the fourth operation panel 57 are connected by a wire, the sixth signal terminal 536 of the fourth operation panel 57 and the second signal terminal 534 of the first operation panel 54 are connected by a wire, so as to form a current loop of a first group of circuits, and the second signal terminal 534 of the fourth operation panel 57 and the sixth signal terminal 536 of the first operation panel 54 are connected by a wire, so as to form a current loop of a second group of circuits.

The a-phase current is input into the current metering module 512 of the first operation panel 54 through the second signal terminal 534 of the first operation panel 54, the a-phase current is output through the third signal terminal 535 of the first operation panel 54, the a-phase current is input into the current metering module 512 by connecting the third signal terminal 535 of the second operation panel 55 through a wire, the a-phase current is output through the second signal terminal 534 of the second operation panel 55, the a-phase current is input into the current metering module 512 of the third operation panel 56 by connecting the seventh signal terminal 537 of the third operation panel 56 through a wire, the a-phase current is output through the sixth signal terminal 536 of the third operation panel 56, the a-phase current is input into the current metering module 512 of the fourth operation panel 57 by connecting the seventh signal terminal 537 of the fourth operation panel 57 through a wire, the a-phase current input is connected to the second signal terminal 534 of the first operation panel 54 by guiding through the sixth signal terminal 536 of the fourth operation panel 57, forming a current loop.

The C-phase current is inputted into the current metering module 512 of the first operation panel 54 through the sixth signal terminal 536 of the first operation panel 54, the C-phase current is outputted through the seventh signal terminal 537 of the first operation panel 54, the C-phase current is inputted into the current metering module 512 by connecting the sixth signal terminal 536 of the second operation panel 55 through a wire, the C-phase current is outputted through the seventh signal terminal 537 of the second operation panel 55, the C-phase current is inputted into the current metering module 512 of the third operation panel 56 by connecting the second signal terminal 534 of the third operation panel 56 through a wire, the C-phase current is outputted through the third signal terminal 535 of the third operation panel 56, the C-phase current is inputted into the current metering module 512 of the fourth operation panel 57 by connecting the second signal terminal 534 of the fourth operation panel 57 through a wire, the C-phase current input is connected to the sixth signal terminal 536 of the first operation panel 54 by guiding, forming a current loop.

Because the current signal terminals are connected through the wires which have certain resistance, the situation of short circuit of the circuit can not be caused. The current flowing in the corresponding current signal terminal group on each operation panel 5 can be obtained through the power metering module on each operation panel 5, the current phase sequence is determined on the same operation panel 5 according to a phase following judgment method, and if the current is not phase following, the current is reversed and then judgment is carried out. The current signal on the first operation panel 54 is ac, the current signal on the second operation panel 55 is-ac, the current signal on the third operation panel 56 is c-a, and the current signal on the fourth operation panel 57 is-c-a. The training device of the embodiment can set various current phase sequences and various current polarity wiring fault conditions existing in the power system through the wiring wire, and can set correct wiring. The current polarity and the current phase sequence are obtained through manual wiring of an operator or through detection, the operator can approach to go to the site to perform wiring operation, so that the operator can really learn correct operation in a training process and distinguish wrong wiring types.

When the number of the operation panels 5 exceeds four, the connection mode between the fifth operation panel 58 and the fourth operation panel 57 is specifically as follows: the second signal terminal 534 of the fourth operation panel 57 and the second signal terminal 534 of the fifth operation panel 58 are connected by a wire, and the sixth signal terminal 536 of the fourth operation panel 57 and the sixth signal terminal 536 of the fifth operation panel 58 are connected by a wire. The connection between the fifth operating panel 58 and the sixth operating panel 59 is the same as the connection between the first operating panel 54 and the second operating panel 55, and is the same as the connection between the training apparatuses, and the fifth operating panel 58 is the first operating panel 54 of the second training apparatus. On the training devices of the four operation panels 5, the first training device and the second training device are connected in series in the above manner, and the first set of loop currents are set so that the sixth signal terminal 536 of the fourth operation panel 57 of the second training device and the second signal terminal 534 of the first operation panel 54 are connected by a wire; the second set of current loops is configured such that the second signal terminal 534 of the fourth operation panel 57 of the second training set and the sixth signal terminal 536 of the first operation panel 54 are connected by a wire; the current signal on the first operating panel 54 of the second training set is ca, the current signal on the second operating panel 55 of the second training set is-ca, the current signal on the third operating panel 56 of the second training set is a-c, and the current signal on the fourth operating panel 57 of the second training set is-a-c, and the two training sets can be set by wiring for 8 current signal types.

The control panel 10 includes a first input terminal 201 connected to an a-phase voltage, a second input terminal 202 connected to an a-phase current, a third input terminal 203, a fourth input terminal 204 connected to a B-phase voltage, a fifth input terminal connected to a C-phase voltage, a sixth input terminal 206 connected to a C-phase current, a seventh input terminal 207, and an eighth output terminal;

the control switch groups comprise a current switch group and a voltage switch group, the voltage switch group comprises a first voltage switch group 111, a second voltage switch group 112, a third voltage switch group 113, a fourth voltage switch group 114, a fifth voltage switch group 115 and a sixth voltage switch group 116, and the current switch group comprises a first current switch group 121, a second current switch group 122, a third current switch group 123, a fourth current switch group 124, a fifth current switch group 125, a sixth current switch group, a seventh current switch group 127 and an eighth current switch group 128; when any one of the first voltage switch group 111, the second voltage switch group 112, the third voltage switch group 113, the fourth voltage switch group 114, the fifth voltage switch group 115 and the sixth voltage switch group 116 is closed, the other voltage switch groups are automatically opened, and when any one of the first current switch group 121, the second current switch group 122, the third current switch group 123, the fourth current switch group 124, the fifth current switch group 125, the sixth current switch group, the seventh current switch group 127 and the eighth current switch group 128 is closed, the other current switch groups are automatically opened.

The control panel 10 further includes a voltage phase sequence indicator 161 corresponding to a voltage phase sequence ABC of the first voltage switch group 111, a voltage phase sequence indicator 161 corresponding to a voltage phase sequence BAC of the second voltage switch group 112, a voltage phase sequence indicator 161 corresponding to a voltage phase sequence CBA of the third voltage switch group 113, a voltage phase sequence indicator 161 corresponding to a voltage phase sequence ACB of the fourth voltage switch group 114, a voltage phase sequence indicator BCA corresponding to a voltage phase sequence of the fifth voltage switch group 115, a voltage phase sequence indicator 161 corresponding to a voltage phase sequence CAB of the sixth voltage switch group 116, a current phase sequence indicator 162 corresponding to a current phase sequence ac, a current phase sequence-ac current phase sequence indicator 162, a current phase sequence a-c current phase sequence indicator 162, -a-c current phase sequence indicator 162, a current phase sequence-c-a current phase sequence indicator 162, A current phase sequence indicator light 162 for a current phase sequence-ca, a current phase sequence indicator light 162 for a current phase sequence c-a, and a current phase sequence indicator light 162 for a current phase sequence ca.

The first voltage switch group 111, the second voltage switch group 112, the third voltage switch group 113, the fourth voltage switch group 114, the fifth voltage switch group 115 and the sixth voltage switch group 116 each include a first switch, a fourth switch and a fifth switch;

the first current switch group 121, the second current switch group 122, the third current switch group 123, the fourth current switch group 124, the fifth current switch group 125, the sixth current switch group, the seventh current switch group 127 and the eighth current switch group 128 each include a second switch, a third switch, a sixth switch and a seventh switch;

the first input terminal 201 is connected to the first signal terminal 531 of the first operation panel 54 through the first switch of the first voltage switch group 111, the fourth input terminal 204 is connected to the fourth signal terminal 532 of the first operation panel 54 through the fourth switch of the first voltage switch group 111, and the fifth input terminal is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the first voltage switch group 111; when the first voltage switch group 111 is closed, the remaining voltage switch groups are all opened, the voltage phase sequence measured by the first operation panel 54 is ABC, and the voltage phase sequence indicator lamp 161 of the voltage phase sequence ABC is turned on.

The first input terminal 201 is connected to the fourth signal terminal 532 of the first operation panel 54 through the fourth switch of the second voltage switch group 112, the fourth input terminal 204 is connected to the first signal terminal 531 of the first operation panel 54 through the first switch of the second voltage switch group 112, and the fifth input terminal is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the second voltage switch group 112; when the second voltage switch group 112 is closed, the remaining voltage switch groups are opened, the voltage phase sequence measured by the first operation panel 54 is BAC, and the voltage phase sequence indicator light 161 of the voltage phase sequence BAC is turned on.

The first input terminal 201 is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the third voltage switch group 113, the fourth input terminal 204 is connected to the fourth signal terminal 532 of the first operation panel 54 through the fourth switch of the third voltage switch group 113, and the fifth input terminal is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the third voltage switch group 113; when the third voltage switch group 113 is closed, the remaining voltage switch groups are opened, the voltage phase sequence measured by the first operation panel 54 is CBA, and the voltage phase sequence indicator light 161 of the voltage phase sequence CBA is turned on.

The first input terminal 201 is connected to the first signal terminal 531 through the first switch of the fourth voltage switch group 114, the fourth input terminal 204 is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the fourth voltage switch group 114, and the fifth input terminal is connected to the fourth signal terminal 532 of the first operation panel 54 through the fourth switch of the fourth voltage switch group 114; when the fourth voltage switch group 114 is closed, the remaining voltage switch groups are opened, the voltage phase sequence measured by the first operation panel 54 is ACB, and the voltage phase sequence indicator 161 of the voltage phase sequence ACB is turned on.

The first input terminal 201 is connected to the fourth signal terminal 532 of the first operation panel 54 through the fourth switch of the fifth voltage switch group 115, the fourth input terminal 204 is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the fifth voltage switch group 115, and the fifth input terminal is connected to the first signal terminal 531 of the first operation panel 54 through the first switch of the fifth voltage switch group 115; when the fifth voltage switch is closed, the remaining voltage switch groups are opened, the voltage phase sequence measured by the first operation panel 54 is BCA, and the voltage phase sequence indicator lamp 161 of the voltage phase sequence BCA is turned on.

The first input terminal 201 is connected to the fifth signal terminal 533 of the first operation panel 54 through the fifth switch of the sixth voltage switch group 116, the fourth input terminal 204 is connected to the first signal terminal 531 of the first operation panel 54 through the first switch of the sixth voltage switch group 116, and the fifth input terminal is connected to the fourth signal terminal 532 of the first operation panel 54 through the fourth switch of the sixth voltage switch group 116; when the sixth voltage switch group 116 is turned on, the remaining voltage switches are turned off, the phase sequence of the voltage measured by the first operation panel 54 is CAB, and the phase sequence indicator 161 of the voltage phase sequence CAB is turned on.

The second input terminal 202 is connected to the second signal terminal 534 of the first operation panel 54 through the second switch of the first current switch, and the sixth input terminal 206 is connected to the sixth signal terminal 536 of the first operation panel 54 through the sixth switch of the first current switch; the first current switch group 121 is closed, the remaining current switches are opened, the current phase sequence measured by the first operation panel 54 is ac, and the current phase sequence indicator lamp 162 of the current phase sequence ac is turned on.

The second input terminal 202 is connected to the third signal terminal 535 of the first operation panel 54 through the third switch of the second current switch group 122, and the sixth input terminal 206 is connected to the sixth signal terminal 536 of the first operation panel 54 through the sixth switch of the second current switch group 122; the second current switch group 122 is closed, the remaining current switches are opened, the current phase sequence measured by the first operation panel 54 is-ac, and the current phase sequence indicator lamp 162 of the current phase sequence-ac is turned on.

The second input terminal 202 is connected to the second signal terminal 534 of the first operation panel 54 through the second switch of the third current switch group 123, and the sixth input terminal 206 is connected to the seventh signal terminal 537 of the first operation panel 54 through the seventh switch of the third current switch group 123; the third current switch group 123 is closed, the remaining current switches are opened, the phase sequence of the current measured by the first operation panel 54 is a-c, and the current phase sequence indicator lamp 162 of the phase sequence of the current a-c is turned on.

The second input terminal 202 is connected to the third signal terminal 535 of the first operation panel 54 through the third switch of the fourth current switch group 124, and the sixth input terminal 206 is connected to the seventh signal terminal 537 of the first operation panel 54 through the seventh switch of the fourth current switch group 124; the fourth current switch group 124 is closed, the remaining current switches are opened, the current phase sequence measured by the first operation panel 54 is-a-c, and the current phase sequence indicator lamp 162 of the current phase sequence-a-c is turned on. A to c

The second input terminal 202 is connected to the seventh signal terminal 537 of the first operation panel 54 through the seventh switch of the fifth current switch group 125, and the sixth input terminal 206 is connected to the third signal terminal 535 of the first operation panel 54 through the third switch of the fifth current switch group 125; the fifth current switch group 125 is closed, the remaining current switches are opened, the current phase sequence measured by the first operation panel 54 is-c-a, and the current phase sequence indicator lamp 162 of the current phase sequence-c-a is turned on.

The second input terminal 202 is connected to the sixth signal terminal 536 of the first operation panel 54 through the sixth switch of the sixth current switch group 126, and the sixth input terminal 206 is connected to the third signal terminal 535 of the first operation panel 54 through the third switch of the sixth current switch group 126; the sixth current switch group 126 is closed, the remaining current switches are opened, the phase sequence of the current measured by the first operation panel 54 is c-a, and the current phase sequence indicator light 162 of the phase sequence of the current c-a is turned on.

The second input terminal 202 is connected to the seventh signal terminal 537 of the first operation panel 54 through the seventh switch of the seventh current switch group 127, and the sixth input terminal 206 is connected to the second signal terminal 534 of the first operation panel 54 through the second switch of the sixth current switch group 126; the seventh current switch group 127 is closed, the remaining current switches are opened, the current phase sequence measured by the first operation panel 54 is-ca, and the current phase sequence indicator light 162 of the current phase sequence-ca is turned on.

The second input terminal 202 is connected to the sixth signal terminal 536 of the first operation panel 54 through the sixth switch of the eighth current switch group 128, and the sixth input terminal 206 is connected to the second signal terminal 534 of the first operation panel 54 through the second switch of the eighth current switch group 128; the eighth current switch group 128 is closed, the remaining current switches are opened, the current phase sequence measured by the first operation panel 54 is ca, and the current phase sequence indicator lamp 162 of the current phase sequence ca is turned on.

The eighth output terminal is directly connected to the eighth signal terminal of the first operation panel 54.

Pressing any one of the voltage switch groups of the control panel 10 enables inputting a-phase voltage, B-phase voltage, and C-phase voltage to the first operation panel 54, and the voltage switch group corresponding to the voltage phase sequence can determine that the voltage phase sequence input to the first operation panel 54 is ABC, and at the same time, it can be confirmed again whether the connection between each input terminal and each signal terminal of the first operation panel 54 is correct by the detection of the first operation panel 54, for example: pressing the first voltage switch group 111 can clearly obtain the voltage phase sequence ABC on the first operation panel 54, and if the first operation panel 54 detects no ABC, the connection between the input terminals and the signal terminals of the first operation panel 54 through the first voltage switch group 111 becomes problematic. The current phase sequence corresponding to the current switch group is the same. According to the connection between the first operation panel 54 and the second operation panel 55, the voltage phase-sequence current phase-sequence of the first operation panel 54 is determined by controlling the first voltage switch group 111 and the first current switch group 121, and the voltage phase-sequence current phase-sequence of the second operation panel 55 can be obtained quickly by wiring. The control of the voltage phase sequence and the current phase sequence input by the first operation panel 54 can be realized through each current switch group and each voltage switch group, the control of the voltage phase sequence and the current phase sequence measured by each operation panel in the training device is realized, the wiring type in 48 is set through the control of the current switch group and the voltage switch group in one training device, the training and examination are carried out under the condition that the first operation panel 54 of an operator inputs different voltage phase sequences and current phase sequences, the training efficiency can be effectively improved, the training effect is improved, and the practical operation and examination of the operator can be conveniently carried out by the examiner.

When the training devices are at least two, the wiring group between the fourth operating panel 57 of the previous training device and the first operating panel 54 of the next training device of the two adjacent training devices is as follows: the first signal terminal 531 of the fourth operation panel 57 of the preceding training set is connected to the first signal terminal 531 of the first operation panel 54 of the succeeding training set, the second signal terminal 534 of the fourth operation panel 57 of the preceding training set is connected to the second signal terminal 534 of the first operation panel 54 of the succeeding training set, the fourth signal terminal 532 of the fourth operation panel 57 of the preceding training set is connected to the fifth signal terminal 533 of the first operation panel 54 of the succeeding training set, the fifth signal terminal 533 of the fourth operation panel 57 of the preceding training set is connected to the fourth signal terminal 532 of the first operation panel 54 of the succeeding training set, and the sixth signal terminal 536 of the fourth operation panel 57 of the preceding training set is connected to the sixth signal terminal 536 of the first operation panel 54 of the succeeding training set.

Specifically, the signal terminal rows 53 between the operation panels 5 in the training devices are connected first, and the connection manner between any two adjacent training devices is the same as the connection manner between the first signal terminal 531, the second signal terminal 534, the third signal terminal 535, the fourth signal terminal 532 and the fifth signal terminal 533 in the fourth operation panel 57, and the sixth signal terminal 536 and the seventh signal terminal 537 are connected to the corresponding first signal terminal 531, second signal terminal 534, third signal terminal 535, fourth signal terminal 532, fifth signal terminal 533, sixth signal terminal 536 and seventh signal terminal 537 of the fifth operation panel 58. That is, the connection between the fourth operation panel 57 and the fifth operation panel 58 is performed in such a manner that any two adjacent training apparatuses are connected.

When the number of the training devices is two, the six voltage phase sequences and eight current signal types can be set through one signal source, and when the number of the training devices is 12, the first group of loop currents are set to be the sixth signal terminal 536 of the fourth operation panel 57 of the last training device and the second signal terminal 534 of the first operation panel 54 which are connected through a wire; the second set of current loops is arranged so that the second signal terminal 534 of the fourth operation panel 57 which becomes the last training set and the sixth signal terminal 536 of the first operation panel 54 are connected by a wire; 48 wiring types can be set, namely 48 wiring types of the three-phase two-element active electric energy meter, six voltage phase sequence wiring groups of the voltage metering module 511 and eight current signal types of the current metering module 512 jointly form 48 wiring types, preferably, the electric energy metering device 51 is a three-phase binary active electric energy meter, and the functions of the current metering module 512 and the voltage metering module 511 can be realized on the three-phase binary active electric energy meter.

In addition, the training device may also be provided with a plurality of operation panels 5, specifically, when the number of the operation panels 5 is six, six voltage phase sequence types can be set by one signal source, when the number of the operation panels 5 is eight, eight current signal types can be set by one signal source, when the number of the operation panels 5 is 48, 48 wiring types can be set by one signal source, and the previous wiring types are not repeated until after the 48 th operation panel. The operator can be fully connected to various different wiring types in the learning process of the electric energy metering device 51, the wiring types are completely the same as those of the actual production field, the operator can be familiar with and connected with various conditions which can occur in the production field by detecting the current and voltage values on each operation panel 5 and wiring the actual line, and when the conditions occur in the field, the conditions can be quickly identified, the training quality is improved, and the actual practical operation ability and the recognition and identification ability of various conditions of the operator are improved.

Compared with the computer simulation mode in the prior art, the training device can simulate the field condition more completely, and can learn by adjusting the phase of the input terminal through the manual wiring of the operator, and check the actual operation real level of the operator through the wiring operation of the operator, the detection of the phase sequence of the current and the voltage and the polarity of the current during checking.

In the training apparatus of the present embodiment, four operation panels 5 are generally provided, and more operation panels 5 can be provided as needed, and the above-mentioned arrangement regarding the six voltage phase sequence types employs six operation panels 5 connected in series, and the training apparatus of the present embodiment corresponds to 48 operation panels 5 connected in series if 48 wiring types are different. Equivalently, the wiring groups between every four adjacent operation panels 5 in the training device are the same, 48 wiring types can be set by one signal source of one wiring group, when an operator performs wiring, the operator can obtain the wiring groups of all the next operation panels 5 by detecting the wiring groups of any four adjacent operation panels 5 and the wiring groups between the four adjacent operation panels 5 and the fifth operation panel 5, and can quickly obtain the voltage phase sequence and the current signals measured on each operation panel 5, and the operator can quickly detect and judge which wiring type the electric energy metering device 51 belongs to and which fault the electric energy metering device belongs to when performing electric energy metering on the site through the detection, actual operation and learning.

The training apparatus further comprises an output terminal row 510, wherein the connection between the output terminal row 510 and the fourth operation panel 57 is the same as the connection between the fourth operation panel 57 and the fifth operation panel 58, that is, the first signal terminal 531 of the fourth operation panel 57 is connected to the first output terminal, the second signal terminal 534 of the fourth operation panel 57 is connected to the second output terminal, the fourth signal terminal 532 of the fourth operation panel 57 is connected to the fifth output terminal, the fifth signal terminal 533 of the fourth operation panel 57 is connected to the fifth output terminal, the sixth signal terminal 536 of the fourth operation panel 57 is connected to the sixth output terminal, the reference signal terminal 538 is connected to the eighth output terminal, wherein the seventh output terminal is connected to the third input terminal 203 through a wire, and the third output terminal is connected to the seventh input terminal 207 through a wire, the signal terminals and the output terminals in the above connection mode are connected through wires. When the current loop is provided, the third input terminal 203 and the seventh output terminal are connected by a wire, and the seventh input terminal 207 and the third output terminal are connected by a wire. When the number of the training apparatuses is two or more, the output terminal row 510 of the previous training apparatus and the input terminal of the next training apparatus in the two adjacent training apparatuses are connected in a one-to-one correspondence, for example, the first output terminal of the first training apparatus is connected to the first input terminal 201 of the second training apparatus by a wire, the second output terminal of the first training apparatus is connected to the second input terminal 202 of the second training apparatus by a wire, the third output terminal of the first training apparatus is connected to the third input terminal 203 of the second training apparatus by a wire, the fourth output terminal of the first training apparatus is connected to the fourth input terminal 204 of the second training apparatus by a wire, the fifth output terminal of the first training apparatus is connected to the fifth input terminal of the second training apparatus by a wire, and the sixth output terminal of the first training apparatus is connected to the sixth input terminal 206 of the second training apparatus by a wire, the seventh output terminal of the first training apparatus is connected to the seventh input terminal 207 of the second training apparatus by a wire, and the eighth output terminal of the first training apparatus is connected to the eighth input terminal 208 of the second training apparatus by a wire. In order to facilitate the loop formation, the second output terminal and the third output terminal of the last output terminal row 510 are directly short-circuited by a metal sheet or a wire, and the sixth output terminal and the seventh output terminal of the last output terminal row 510 are short-circuited by a metal sheet or a wire. The input terminals are convenient for signal source access, the output terminal row 510 is convenient for transition between two adjacent training devices, the two adjacent training devices only need to connect the output terminal row 510 of the previous training device with the input terminals of the next device in a one-to-one correspondence mode through conducting wires, wherein the input terminal interfaces correspond to the input terminals, the output terminal interfaces 4 correspond to the output terminal row 510, and when an operator connects wires to the two adjacent training devices, the operator only needs to connect the two adjacent training devices through the conducting wires in a one-to-one correspondence mode, the condition that the interfaces of the two adjacent training devices are staggered does not need to be considered, and wiring errors are avoided; the input and output terminal rows 510 are arranged in a manner consistent with the design of the power metering involved in the production site, enabling an operator to connect to the general arrangement of the production site, facilitating the operator to be familiar with the arrangement of the various connection ports on the production site.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A series connection type electric energy metering simulation wiring training device is characterized by comprising at least four operation panels, the operation panel comprises an electric energy metering device and a signal terminal strip, the electric energy metering device comprises a voltage metering module and a current metering module, the signal terminal row comprises a voltage signal terminal group, a first current signal terminal group, a second current signal terminal group and a reference signal terminal, the set of voltage signal terminals includes three voltage signal terminals, the set of first current signal terminals includes a second signal terminal and a third signal terminal, the second current signal terminal group comprises a sixth signal terminal and a seventh signal terminal, the voltage metering module is connected with the three voltage signal terminals, the current metering module is connected between the second signal terminal and the third signal terminal and between the sixth signal terminal and the seventh signal terminal in series;

the second signal terminal or the third signal terminal is connected to any one of the phase current A and the phase current C, and the sixth signal terminal or the seventh signal terminal is connected to the other one of the phase current A and the phase current C;

the signal terminal rows on two adjacent operation panels form a group of wiring groups through wires:

the two groups of wiring sets between any three adjacent operation panels are different, and the two groups of wiring sets between any three adjacent operation panels can be exchanged; the voltage signal terminal group comprises a first signal terminal, a fourth signal terminal and a fifth signal terminal, and the voltage metering module is connected in parallel to the first signal terminal and the fourth signal terminal and the fifth signal terminal;

alternatively, the first and second electrodes may be,

2. The series-type electric energy metering simulation wiring training device as claimed in claim 1, wherein the electric energy metering device comprises a three-phase two-element active electric energy meter, the electric energy meter comprises seven wiring terminals, the seven wiring terminals are respectively three voltage wiring terminals and two sets of current wiring terminal groups, the three voltage wiring terminals are respectively connected with a first signal terminal, a fourth signal terminal and a fifth signal terminal, one set of current wiring terminal groups is connected with a second signal terminal and a third signal terminal, and the other set of current wiring terminal groups is connected with a sixth signal terminal and a seventh signal terminal.

3. The series connection type electric energy metering simulation wiring training device as claimed in claim 2, wherein the training device further comprises a joint junction box, the joint junction box comprises at least seven groups of connecting terminals and an external module for externally connecting an accessed circuit, each group of connecting terminals is provided with a connecting input terminal and a connecting output terminal in a one-to-one correspondence manner, the external module is arranged between the connecting input terminal and the connecting output terminal, the connecting terminals of the electric energy meter are connected with the connecting input terminals of the joint junction box in a one-to-one correspondence manner, and the connecting output terminals of the joint junction box are connected with three voltage signal terminals, a second signal terminal, a third signal terminal, a sixth signal terminal and a seventh signal terminal in a one-to-one correspondence manner.

4. The series electric energy metering simulation wiring training device as claimed in claim 3, further comprising a control panel, wherein the control panel comprises a control switch set, and A-phase voltage, B-phase voltage, C-phase voltage, A-phase current and C-phase current are connected into the control switch set;

5. The series electric energy metering simulation wiring training device as claimed in claim 4, wherein the control panel further comprises a first input terminal connected with the A-phase voltage, a second input terminal connected with the A-phase voltage, a third input terminal, a fourth input terminal connected with the B-phase voltage, a fifth input terminal connected with the C-phase voltage, a sixth input terminal connected with the C-phase voltage, a seventh input terminal and an eighth input terminal;

6. The in-line electric energy metering simulation wiring training device as claimed in claim 5, wherein the wiring group between the fourth operation panel of the previous training device and the first operation panel of the next training device of at least two adjacent training devices is as follows: the first signal terminal of the fourth operation panel of the previous training set is connected with the first signal terminal of the first operation panel of the next training set, the second signal terminal of the fourth operation panel of the previous training set is connected with the second signal terminal of the first operation panel of the next training set, the fourth signal terminal of the fourth operation panel of the previous training set is connected with the fifth signal terminal of the first operation panel of the next training set, the fifth signal terminal of the fourth operation panel of the previous training set is connected with the fourth signal terminal of the first operation panel of the next training set, and the sixth signal terminal of the fourth operation panel of the previous training set is connected with the sixth signal terminal of the first operation panel of the next training set.

7. The in-line power metering simulation wiring training device as claimed in claim 6, wherein the training device further comprises an output terminal row;

the output terminal row comprises a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a fifth output terminal, a sixth output terminal, a seventh output terminal and an eighth output terminal, wherein the first signal terminal of the fourth operation panel is connected with the first output terminal, the second signal terminal of the fourth operation panel is connected with the second output terminal, the fourth signal terminal of the fourth operation panel is connected with the fifth output terminal, the fifth signal terminal of the fourth operation panel is connected with the fifth output terminal, the sixth signal terminal of the fourth operation panel is connected with the sixth output terminal, the reference signal terminal is connected with the eighth output terminal, the seventh output terminal is connected with the third input terminal through a lead, and the third output terminal is connected with the seventh input terminal through a lead.

8. The series electric energy metering simulation wiring training device as claimed in claim 7, further comprising a cabinet body, wherein the cabinet body comprises an upper part and a lower part, the lower part of the cabinet body is provided with at least eight input terminal interfaces for signal source access and at least eight output terminal interfaces for signal line access, the input terminal interfaces and the output terminal interfaces are arranged on the left side wall and the right side wall of the lower part of the cabinet body, and the front side surface and the rear side surface of the lower part of the cabinet body are provided with openable lower doors;