CN113012540A - Wiring principle training device - Google Patents
Wiring principle training device Download PDFInfo
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- CN113012540A CN113012540A CN202110214579.1A CN202110214579A CN113012540A CN 113012540 A CN113012540 A CN 113012540A CN 202110214579 A CN202110214579 A CN 202110214579A CN 113012540 A CN113012540 A CN 113012540A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
- G09B23/185—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits for building block systems
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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Abstract
The embodiment of the invention discloses a wiring principle training device, which comprises: the system comprises an electric energy meter, a wiring module and a three-phase circuit; the wiring module at least comprises a first wiring terminal and a second wiring terminal, the first wiring terminal is connected with the electric energy meter, and the second wiring terminal is connected with the three-phase line; the plugging lead is used for inserting or pulling out at least one of the first wiring terminal or the second wiring terminal so as to change the wiring state of the wiring principle training device. The connection mode of the three-phase terminal and the three-phase line of the electric energy meter can be changed through the plugging and unplugging wires, and the person to be trained can correspond the parameter information to the wiring condition between the three-phase lines which can be visually seen after measuring the phase voltage, the current and the phase angle parameter of each phase of the electric energy meter, so that the relation between theoretical knowledge and actual work is enhanced.
Description
Technical Field
The embodiment of the invention relates to the technical field of training in power production, in particular to a wiring principle 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.
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. Therefore, in the process of training the power grid operator, simulation of various conditions should be performed as much as possible. The current wrong wiring simulation device used by a power grid company consists of a wrong wiring simulation cabinet and a computer host, is closed on a circuit, can only control the wrong wiring type of the simulation cabinet through training software installed on the computer, and needs to be operated on the computer every time the wrong wiring type is changed. The student contacts the front panel part of the secondary circuit connected with the simulation cabinet, only two electric energy meters, a junction box and secondary circuit wires are arranged, the student can judge the wiring correctness and the wrong wiring type only by measuring the related voltage, current and phase angle of the voltage and the current, but the specific wrong wiring condition cannot be intuitively reflected。
Disclosure of Invention
The invention provides a wiring principle training device, which is used for changing a wiring state through plugging and unplugging a lead and visually representing a wiring condition.
The embodiment of the invention provides a wiring principle training device, which comprises: the system comprises an electric energy meter, a wiring module and a three-phase circuit;
the wiring module at least comprises a first wiring terminal and a second wiring terminal, the first wiring terminal is connected with the electric energy meter, and the second wiring terminal is connected with the three-phase line;
the plugging lead is used for being inserted into or pulled out of at least one of the first wiring terminal or the second wiring terminal so as to change the wiring state of the wiring principle training device.
Optionally, the wiring module further comprises a third wiring terminal, the first wiring terminal and the third wiring terminal are respectively arranged in a row, and the third wiring terminal is located between the first wiring terminal and the second wiring terminal.
Optionally, the wiring principle training device further comprises a junction box, and the electric energy meter is connected with the first wiring terminal through the junction box.
Optionally, the wiring principle training device further comprises a current transformer;
the second connecting terminal comprises a plurality of voltage connecting terminals and a plurality of current connecting terminals; the voltage wiring terminal is respectively connected with a first phase line, a second phase line, a third phase line and a neutral line of the three-phase circuit;
the current transformer is used for detecting the current of the three-phase line, and the current wiring terminal is correspondingly connected with the output end of the current transformer.
Optionally, the wiring principle training device further comprises a wiring board, the first wiring terminal, the second wiring terminal and the third wiring terminal are arranged on the wiring board, and the plug-pull wires are located on the back surface of the wiring board after being inserted into the first wiring terminal, the second wiring terminal or the third wiring terminal; the wiring board comprises an electrochromic glass plate and an operating switch, and the operating switch is used for controlling the state of the wiring board to be transparent or non-transparent.
Optionally, the wiring principle training device further comprises a power conversion module, an input end of the power conversion module is electrically connected with the low-voltage direct-current power supply, and an output end of the power conversion module is connected with the three-phase line.
Optionally, the power conversion module includes an inverter circuit, a phase shift circuit, and an arithmetic circuit;
the inverter circuit is connected with the phase-shifting circuit and is used for inverting the direct current signal into a sinusoidal alternating current signal;
the phase shift circuit is connected with the operational circuit and is used for separating the sinusoidal alternating current signal into three-phase symmetrical sinusoidal alternating current signals;
the operation circuit is used for separating three-phase symmetrical sine alternating current signals into three-phase voltage signals.
Optionally, the electric energy meter includes a first unit, a second unit and a third unit; the junction box comprises a first phase line terminal, a second phase line terminal, a third phase line terminal and a middle line terminal;
a first end of the first unit is electrically connected with the first phase line terminal, and a second end of the first unit is electrically connected with the neutral line terminal;
a first end of the second cell is electrically connected to the second phase terminal and a second end of the second cell is electrically connected to the neutral terminal;
the first end of the third unit is electrically connected with the third phase line terminal, and the second end of the third unit is electrically connected with the neutral line terminal.
Optionally, the first connection terminal comprises ten terminals; the second connecting terminal and the third connecting terminal are respectively identical to the first connecting terminal in structure;
a first terminal of the first wiring terminal is electrically connected with a voltage terminal of the first phase line terminal, and a second terminal and a third terminal of the first wiring terminal are respectively electrically connected with two current terminals of the first phase line terminal;
a fourth terminal of the first wiring terminal is electrically connected with a voltage terminal of the second phase terminal, and a fifth terminal and a sixth terminal of the first wiring terminal are respectively electrically connected with two current terminals of the second phase terminal;
a seventh terminal of the first connection terminal is electrically connected with a voltage terminal of the third phase line terminal, and an eighth terminal and a ninth terminal of the first connection terminal are respectively electrically connected with two current terminals of the third phase line terminal;
the tenth terminal of the first connection terminal is electrically connected to the neutral terminal of the junction box.
Optionally, the wiring principle training device comprises a first current transformer, a second current transformer and a third current transformer;
the output end of the first current transformer is electrically connected with the second end and the third end of the second wiring terminal;
the output end of the second current transformer is electrically connected with the fifth end and the sixth end of the second wiring terminal;
and the output end of the third current transformer is electrically connected with the eighth end and the ninth end of the second wiring terminal.
The embodiment of the invention provides a wiring principle training device, which comprises an electric energy meter, a wiring module and a three-phase circuit, wherein the electric energy meter is connected with the wiring module through a three-phase circuit; the wiring module at least comprises a first wiring terminal and a second wiring terminal, the first wiring terminal is connected with the electric energy meter, and the second wiring terminal is connected with the three-phase line; the plugging lead is used for inserting or pulling out at least one of the first wiring terminal or the second wiring terminal so as to change the wiring state of the wiring principle training device. The embodiment can combine different connection modes of the first connection terminal and the second connection terminal through the plug-pull wires, and then the connection modes of a three-phase terminal of the electric energy meter and a three-phase line can be changed, after a person to be trained measures phase voltages, currents and phase angle parameters of the phases flowing into the electric energy meter from the three-phase line, which wiring errors occur between the electric energy meter and the three-phase line can be determined according to parameter information, after the type of the wiring errors is determined, the wiring condition between the electric energy meter and the three-phase line can be visually seen according to a wiring principle training device, therefore, the person to be trained can correspond the type of the wiring errors reflected by the parameter information to the specific wiring condition, and the relation between theoretical knowledge and actual work is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a wiring principle training device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a wiring principle training device according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a wiring principle training device provided by a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a wiring principle training device according to an embodiment of the present invention, and referring to fig. 1, the wiring principle training device optionally includes an electric energy meter 100, a wiring module 200, and a three-phase line 300;
the 200 connection module at least comprises a first connection terminal 210 and a second connection terminal 220, wherein the first connection terminal 210 is connected with the electric energy meter 100, and the second connection terminal 220 is connected with a three-phase line 300;
and a plug wire 400 for inserting or extracting at least one of the first connection terminal 210 or the second connection terminal 220 to change a connection state of the connection principle training device.
The three-phase line 300 includes a phase line a, a phase line B, a phase line C, and a neutral line, where a represents the phase line a, B represents the phase line B, C represents the phase line C, and N represents the neutral line in fig. 1. One end of the phase line A is connected with a power supply, the other end of the phase line A is connected with a load, and the structures of the phase line B and the phase line C are the same as those of the phase line A. The first connection terminal 210 and the second connection terminal 220 may include a plurality of terminals, and fig. 1 exemplarily shows a case where each of the first connection terminal 210 and the second connection terminal 220 includes four terminals, and when the first connection terminal 210 has four terminals, the electric energy meter 100 correspondingly has four terminals to be connected to the first connection terminal 210. Illustratively, the first terminal a1 of the electric energy meter 100 is an a-phase voltage terminal of the electric energy meter, and the second terminal a2 and the third terminal A3 of the electric energy meter 100 are both a-phase current terminals of the electric energy meter.
The first terminal B1 of the first wire terminal 210, the second terminal B2 of the first wire terminal 210, the third terminal B3 of the first wire terminal 210, and the tenth terminal B10 of the first wire terminal 210 are electrically connected to the first terminal a1 of the electric energy meter 100, the second terminal a2 of the electric energy meter 100, the third terminal A3 of the electric energy meter 100, and the tenth terminal a10 of the electric energy meter 100, respectively; the first terminal C1 of the second connection terminal 220, the second terminal C2 of the second connection terminal 220, and the third terminal C3 of the second connection terminal 220 are electrically connected to the a-phase line of the three-phase line 300, respectively, and the tenth terminal C10 of the second connection terminal 220 is electrically connected to the neutral line of the three-phase line 300.
The wires between any one of the first connection terminals 210 and any one of the second connection terminals 220 are plug wires 400. Fig. 1 exemplarily shows a case where the electric energy meter 100 is correctly wired to the three-phase line 300, when the electric energy meter 100 is correctly wired to the three-phase line 300, two voltage meter pens of a field verifier or a phase voltammeter are used to measure a voltage between the first terminal B1 (which may also be the first terminal C1 of the second connection terminal 220) of the first connection terminal 210 and a neutral line as an a-phase voltage U1, and a current meter pen of the field verifier or the phase voltammeter is nested on a wire between the second terminal B2 of the first connection terminal 210 and the a-phase line or on a wire between the third terminal B3 of the first connection terminal 210 and the a-phase line, and the measured current is an a-phase current I1, and a phase difference between the voltage and the current displayed on the field verifier or the phase voltammeter is 0 degree.
In order to deepen the understanding of the wiring circuit of the electric energy meter by the personnel to be trained (which can refer to electric power inspectors), the training of the personnel to be trained can be realized by corresponding the parameter information and the actual type of the wiring error according to the measured parameter information of the circuit under the condition that the wiring error of the electric energy meter 100 is known, and meanwhile, the wiring principle training device can also be adopted to check the electric power detection operators. During examination, an operator sets a certain wiring error type in advance, for example, a voltage open-phase error may be set, specifically, a plug-pull wire between the first terminal B1 of the first wiring terminal 210 and the first terminal C1 of the second wiring terminal 220 may be pulled out, after the wiring error type is set, a wire between the electric energy meter 100 and the three-phase line 300 may be shielded, only the terminal and a small portion of the wire near the terminal are exposed (the exposed small portion of the wire near the terminal may facilitate nesting of a current meter pen of the phase voltammeter), and a person to be trained uses the phase voltammeter to measure voltage, current, and a phase difference between the voltage and the current between the electric energy meter 100 and the three-phase line 300. One voltage meter pen of the phase voltammeter is placed on a contact point of a neutral line N, the other voltage meter pen is placed on a first terminal C1 of the second connection terminal 220, the voltage measured at this time is an a-phase voltage U1, the voltage meter pen on the neutral line N is stationary, the meter pen on the first terminal C1 of the second connection terminal 220 is moved to a first terminal B1 of the first connection terminal 210, the measured voltage is 0, during the voltage measurement, the current meter pen of the phase voltammeter is nested on a wire exposed between the second terminal B2 of the first connection terminal 210 and the a-phase line or on a wire exposed between the third terminal B3 of the first connection terminal 210 and the a-phase line, and according to the voltage between the first terminal B1 of the first connection terminal 210 and the neutral line N being 0, the current between the electric energy meter 100 and the three-phase line 300 being I1, the type of the wiring error can be determined as a voltage open phase, after the person to be trained gives an answer according to the measurement result, the operator can remove the shielding object, the person to be trained can visually see the wiring condition between the electric energy meter 100 and the three-phase line 300, the measurement result of the parameter, the wrong wiring type and the corresponding actual wiring condition are corresponded, and the cognition of the wrong wiring type is strengthened.
In the wiring principle training cabinet in the prior art, connecting wires between the electric energy meter 100 and the three-phase circuit 300 are arranged in a cabinet body structure, a power inspector cannot intuitively know the wiring condition and cannot correspond the measured parameter information with the actual wiring condition, the wiring principle training cabinet can only be controlled by a computer every time the wrong wiring type is changed, and an operator needs to go back and forth between the wiring principle training cabinet and the computer when checking, the wiring principle training device of the embodiment can visually display the specific wiring condition to the operator to be trained after the operator determines the wrong wiring type according to the measured parameter information, so that the operator can conveniently correspond theoretical knowledge with the actual wiring, the operator to be trained can quicken the mastering of the wrong wiring type, and simultaneously when the operator changes the wrong wiring type, the operation is directly carried out on site, and the operation is simple and convenient.
The embodiment of the invention provides a wiring principle training device, which comprises an electric energy meter, a wiring module and a three-phase circuit, wherein the electric energy meter is connected with the wiring module through a three-phase circuit; the wiring module at least comprises a first wiring terminal and a second wiring terminal, the first wiring terminal is connected with the electric energy meter, and the second wiring terminal is connected with the three-phase line; the plugging lead is used for inserting or pulling out at least one of the first wiring terminal or the second wiring terminal so as to change the wiring state of the wiring principle training device. The embodiment can combine different connection modes of the first connection terminal and the second connection terminal through the plug-pull wires, and then the connection modes of a three-phase terminal of the electric energy meter and a three-phase line can be changed, after a person to be trained measures phase voltages, currents and phase angle parameters of the phases flowing into the electric energy meter from the three-phase line, which wiring errors occur between the electric energy meter and the three-phase line can be determined according to parameter information, after the type of the wiring errors is determined, the wiring condition between the electric energy meter and the three-phase line can be visually seen according to a wiring principle training device, therefore, the person to be trained can correspond the type of the wiring errors reflected by the parameter information to the specific wiring condition, and the relation between theoretical knowledge and actual work is enhanced.
Example two
Fig. 2 is a schematic structural diagram of a connection principle training device according to a second embodiment of the present invention, and referring to fig. 2, on the basis of the above embodiments, optionally, the connection module 200 further includes a third connection terminal 230, the first connection terminal 210 and the third connection terminal 230 are respectively arranged in a row, and the third connection terminal 230 is located between the first connection terminal 210 and the second connection terminal 220.
The third connection terminal 230 includes a plurality of terminals, and the structure of the third connection terminal 230 may be the same as the structure of the first connection terminal 210 and the second connection terminal 220, i.e., the terminals of the third connection terminal 230 correspond to the terminals of the first connection terminal 210 and the terminals of the second connection terminal 220, one-to-one, and for example, the third connection terminal 230 includes four terminals, fig. 2 exemplarily shows the connection condition when the electric energy meter 100 is correctly connected to the three-phase line 300, i.e., the first terminal D1 of the third connection terminal 230 is connected to the first terminal B1 of the first connection terminal 210 and the first terminal C1 of the second connection terminal 220, respectively, the second terminal D2 of the third connection terminal 230 is connected to the second terminal B2 of the first connection terminal 210 and the second terminal C2 of the second connection terminal 220, respectively, the third terminal D3 of the third connection terminal 230 is connected to the third terminal B3 of the first connection terminal 210 and the third terminal C3 of the second connection terminal 220, the tenth terminal D10 of the third wire terminal 230 is connected to the tenth terminal B10 of the first wire terminal 210 and the tenth terminal C10 of the second wire terminal 220, respectively.
When a wrong wiring type is set for training a person to be trained, for example, a wrong wiring of voltage phase loss is set, a plugging lead between the first terminal B1 of the first wiring terminal 210 and the first terminal D1 of the third wiring terminal 230 may be unplugged, or a plugging lead between the first terminal D1 of the third wiring terminal 230 and the first terminal C1 of the second wiring terminal 220 may be unplugged, and adding the third wiring terminal 230 may increase various optional conditions for setting the same fault, so that the wiring is more flexible when the wrong wiring type is set.
With continued reference to fig. 2, optionally, the wiring principle training apparatus further includes a terminal box 500, and the electric energy meter 100 is connected to the first wiring terminal 210 through the terminal box 500.
With continued reference to fig. 2, optionally, the wiring principle training apparatus further includes a current transformer 600, and the second connection terminal 220 includes a plurality of voltage connection terminals and a plurality of current connection terminals; the voltage terminals are respectively connected with the first phase line, the second phase line, the third phase line and the neutral line of the three-phase line 300;
the current transformer 600 is used for detecting the current of the three-phase line 300, and the current wiring terminal is correspondingly connected with the output end of the current transformer 600.
Fig. 2 exemplarily shows a case where the second connection terminal 220 includes two voltage terminals and two current terminals, a first terminal C1 of the second connection terminal 220 and a tenth terminal C10 of the second connection terminal 220 are voltage terminals, a second terminal C2 of the second connection terminal 220 and a third terminal C3 of the second connection terminal 220 are current terminals, the first phase line is an a-phase line, the second phase line is a B-phase line, and the third phase line is a C-phase line. The first terminal C1 of the second connection terminal 220 and the tenth connection terminal C10 of the second connection terminal 220 are voltage terminals connected to the a-phase line and the neutral line of the three-phase line 300, respectively.
The current transformer 600 is included in the present embodiment, the first output terminal k1 and the second output terminal k2 of the current transformer 600 are respectively connected to the second terminal C2 of the second connection terminal 220 and the third terminal C3 of the second connection terminal 220, and the current transformer 600 is configured to transmit the current induced by the a-phase line to the electric energy meter 100, so that the electric energy meter 100 can perform electric energy metering conveniently.
With continued reference to fig. 2, optionally, the wiring principle training apparatus further includes a wiring board 700, the first wiring terminal 210, the second wiring terminal 220, and the third wiring terminal 230 are disposed on the wiring board 700, and after the plug wire 400 is inserted into the first wiring terminal 210, the second wiring terminal 220, or the third wiring terminal 230, the plug wire 400 is located on the back side of the wiring board; the wiring board 700 includes an electrochromic glass plate 710 and an operation switch 720, and the operation switch 720 is used to control the state of the wiring board 700 to be transparent or opaque.
After the operation switch 720 is turned on, the electrochromic glass plate 710 is changed into an opaque state under the action of an external electric field, so that the wiring board 700 is further changed into the opaque state, and after the operation switch 720 is turned off, no current flows through the electrochromic glass plate 710, and the electrochromic glass plate 710 is changed into a transparent state.
When the person to be trained is in the examination process, the operation switch 720 is closed to enable the wiring board 700 to be opaque, the shielding of the conducting wire is achieved, the person to be trained can judge what wiring error type the current line is by measuring the voltage, the current, the phase difference between the voltage and the current and other parameter information of the line, after the examination is completed, the operation switch 720 can be disconnected by the operator, the wiring board 700 is in a transparent state, the person to be trained can visually see the wiring condition at the moment, and therefore the measured parameter information corresponds to the actual wiring condition.
With reference to fig. 2, optionally, the wiring principle training apparatus further includes a power conversion module 800, an input end of the power conversion module 800 is electrically connected to the low-voltage dc power supply, and an output end of the power conversion module 800 is connected to the three-phase line 400.
The power conversion module 800 and the three-phase circuit 400 can be connected through a voltage transformer, when the power voltage connected with the power conversion module 800 is higher, the voltage can be reduced by the voltage transformer and then transmitted to the three-phase circuit 400, so that the voltage of the measurement position of the personnel to be trained is lower, and the safety of the personnel to be trained is ensured
Optionally, the power conversion module 800 includes an inverter circuit 810, a phase shift circuit 820, and an arithmetic circuit 830;
the inverter circuit 810 is connected to the phase shift circuit 820, and is configured to invert the dc signal into a sinusoidal ac signal;
the phase shift circuit 820 is connected with the arithmetic circuit 830 and is used for separating the sinusoidal alternating current signal into three-phase symmetrical sinusoidal alternating current signals;
the operation circuit 830 is used to separate three-phase symmetric sinusoidal ac signals into three-phase voltage signals.
The power conversion module 800 is connected to a low voltage dc power supply, which may be 12V dc power supply, for example, the inverter circuit 810 inverts the 12V dc signal to generate a 50Hz sinusoidal ac signal, the sinusoidal ac signal is separated by the phase shift circuit 820 to obtain a three-phase symmetric sinusoidal ac signal, the three-phase symmetric sinusoidal ac signal is separated by the operation circuit 830 to obtain a three-phase voltage signal, and the three-phase voltage signal is finally transmitted to the three-phase line 400 as an input signal.
The wiring principle training device of this embodiment sets up third binding post and makes when setting up wrong wiring type, the plug wire that can operate increases, and the design is more nimble, sets up the plug wire in the back of electroluminescent glass board simultaneously, controls the transparency and the nontransparency of electroluminescent glass board through operating switch's closure and turn-off, is convenient for operating personnel's examination state and the free switching between the examination completion state during the training. The wiring principle training device of this embodiment connects low pressure DC power supply, even treat that the training personnel appear the electric leakage accident when measuring line parameter information, can not cause the influence to personal safety yet, promotes the security of training.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a wiring principle training device according to a third embodiment of the present invention, and referring to fig. 3, optionally, the electric energy meter 100 includes a first unit, a second unit, and a third unit; junction box 500 includes a first phase terminal, a second phase terminal, a third phase terminal, and a neutral terminal;
the first end of the first unit is electrically connected with the first phase line terminal, and the second end of the first unit is electrically connected with the neutral line terminal;
the first end of the second unit is electrically connected with the second phase wire terminal, and the second end of the second unit is electrically connected with the neutral wire terminal;
the first end of the third unit is electrically connected with the third phase line terminal, and the second end of the third unit is electrically connected with the neutral line terminal.
The first phase terminal of the junction box 500 may be a terminal corresponding to an a-phase line, the second phase terminal may be a terminal corresponding to a B-phase line, the third phase terminal may be a terminal corresponding to a C-phase line, and the first phase terminal, the second phase terminal, and the third phase terminal respectively include a voltage terminal and two current terminals. The first end of the first unit of the electric energy meter 100 includes a voltage terminal and two current terminals, the voltage terminal and the current terminal of the first end of the first unit are respectively connected with the voltage terminal and the current terminal of the first phase terminal of the junction box 500, the first end of the second unit of the electric energy meter 100 includes a voltage terminal and two current terminals, the voltage terminal and the current terminal of the first end of the second unit are respectively connected with the voltage terminal and the current terminal of the second phase terminal of the junction box 500, the first end of the third unit of the electric energy meter 100 includes a voltage terminal and two current terminals, and the voltage terminal and the current terminal of the first end of the third unit are respectively connected with the voltage terminal and the current terminal of the third phase terminal of the junction box 500. The second end of the first unit, the second end of the second unit, and the second end of the third unit of the electric energy meter 100 are respectively connected to the neutral terminal of the junction box 500.
Alternatively, the first connection terminal 210 includes ten terminals; the second connection terminal 220 and the third connection terminal 230 have the same structure as the first connection terminal 210, respectively;
the first terminal B1 of the first connection terminal 210 is electrically connected to a voltage terminal of the first phase line terminal, and the second terminal B2 and the third terminal B3 of the first connection terminal 210 are electrically connected to two current terminals of the first phase line terminal, respectively;
the fourth terminal B4 of the first connection terminal 210 is electrically connected with a voltage terminal of the second phase terminal, and the fifth terminal B5 and the sixth terminal B6 of the first connection terminal 210 are electrically connected with two current terminals of the second phase terminal, respectively;
the seventh terminal B7 of the first connection terminal 210 is electrically connected to a voltage terminal of the third phase line terminal, and the eighth terminal B8 and the ninth terminal B9 of the first connection terminal 210 are electrically connected to two current terminals of the third phase line terminal, respectively;
the tenth terminal B10 of the first connection terminal 210 is electrically connected to the neutral terminal of the junction box.
Optionally, the wiring principle training device includes a first current transformer 610, a second current transformer 620 and a third current transformer 630;
the output end of the first current transformer 610 is electrically connected with the second end C2 and the third end C3 of the second connection terminal 220;
the output end of the second current transformer 620 is electrically connected with the fifth end C5 and the sixth end C6 of the second connection terminal 220;
the output terminal of the third current transformer 630 is electrically connected to the eighth terminal C8 and the ninth terminal C9 of the second connection terminal 220.
The first current transformer 610 is connected to the a-phase line for transmitting the a-phase current to the electric energy meter 100, the second current transformer 620 is connected to the B-phase line for transmitting the B-phase current to the electric energy meter 100, and the third current transformer 630 is connected to the C-phase line for transmitting the C-phase current to the electric energy meter 100.
After the electric energy meter 100 is connected with the terminals of the junction box 500 in a one-to-one correspondence manner, and the terminals of the junction box 500 are connected with the ten terminals of the first connection terminal 210 in a one-to-one correspondence manner, when the electric energy meter 100 normally measures each phase voltage and current, the first end B1 of the first connection terminal is connected to the a-phase line of the three-phase circuit 300 through the first end D1 of the third connection terminal 230 and the first end C1 of the second connection terminal 220, the second end B2 and the third end B3 of the first connection terminal are connected to the a-phase line of the three-phase circuit 300 through the second end D2 and the third end D3 of the third connection terminal 230 and the second end C2 and the third end C7 of the second connection terminal 220, respectively, the first current transformer 610 is connected to the a-phase line of the three-phase circuit 300, the fourth end B4 of the first connection terminal is connected to the B-phase line 539 of the three-phase circuit 300 through the fourth ends D4 and C4 of the third connection terminal 230, and the fifth end B6, The sixth terminal D6, the fifth terminal C6 and the sixth terminal C6 of the second connection terminal 220, and the second current transformer 620 are connected to the phase-B line of the three-phase circuit 300, the seventh terminal B7 of the first connection terminal is connected to the phase-C line of the three-phase circuit 300 through the seventh terminal D7 of the third connection terminal 230 and the seventh terminal C7 of the second connection terminal 220, and the eighth terminal B8 and the ninth terminal B9 of the first connection terminal are connected to the phase-C line of the three-phase circuit 300 through the eighth terminal D8 and the ninth terminal D9 of the third connection terminal 230, the eighth terminal C8 and the ninth terminal C9 of the second connection terminal 220, and the third current transformer 630, respectively.
Fig. 3 exemplarily shows a case that the wiring of the electric energy meter 100 is correct, in some power utilization situations, a user may change the wiring of the electric energy meter 100 privately, for example, the a-phase voltage terminal and the B-phase voltage terminal of the electric energy meter 100 are reversely connected, which results in a reduction of the final power utilization metering, and voltage values and current values on the electric energy meter 100 are still correct readings, which results in that a power inspector cannot find that the electric energy meter 100 has a wiring error, and in such a case, training of the power inspector should be strengthened to make the wiring of the electric energy meter clearly known.
In this embodiment, an operator may simulate a situation of reverse connection of phase lines by using the training apparatus for the wiring principle, for example, a situation that the phase lines of the electric energy meter 100 are reversely connected may be represented by reversely connecting plug and pull wires at the first terminal D1 and the fourth terminal D4 of the third wiring terminal 230, then a person to be trained may measure the voltage between the wiring module 200 and the three-phase circuit 300 by using the phase voltammeter, the voltage between the first terminal D1 of the third wiring terminal 230 and the tenth terminal D10 of the third wiring terminal 230 is measured as a first voltage U11, the voltage between the first terminal B1 of the first wiring terminal 210 and the tenth terminal D10 of the third wiring terminal 230 is measured as a second voltage U12, and meanwhile, the current a of the wire between the second terminal B2 of the first wiring terminal 210 and the second terminal C2 of the second wiring terminal 220 (also, the current a between the third terminal B584 of the first wiring terminal 210 and the third terminal C3 of the second wiring terminal 220) is measured as a phase current I1 by using the phase voltammeter, the phase difference between the first voltage U11, the second voltage U12 and the phase difference between the phase difference a I1 and the phase difference a I1 are 120 degrees, the voltage between the wiring module 200 and the three-phase loop 300 is measured by the phase voltammeter for multiple times, the voltage between the fourth terminal D4 of the third wiring terminal 230 and the tenth terminal D10 of the third wiring terminal 230 is the third voltage U21, the voltage between the fourth terminal B4 of the first wiring terminal 210 and the tenth terminal D10 of the third wiring terminal 230 is the fourth voltage U22, the current between the fifth terminal B5 of the first wiring terminal 210 and the fifth terminal C5 of the second wiring terminal 220 (the voltage between the sixth terminal B6 of the first wiring terminal 210 and the sixth terminal C6 of the second wiring terminal 220) is the phase difference B I2, and the phase difference between the third voltage U21, the fourth voltage U22 and the phase difference B I356 is 120 degrees, so that the phase difference between the first voltage U21, the second voltage U22 and the phase difference a I353627 is 120 degrees, and the phase difference a3 is 120 degrees, and the phase difference a 12 is known as the phase difference a When the phase difference between the voltage U21 and the fourth voltage U22 and the phase difference between the phase I2 of the phase B are 120 degrees, the phase A and the phase B of the electric energy meter 100 are judged to be reversely connected. The person to be trained can visually see the wrong wiring condition of the electric energy meter 100, and then according to the measured parameters, the wiring condition corresponding to the parameter information can be determined, so that the person to be trained can be deeply aware of the wiring of the electric energy meter 100.
The wiring principle training device provided by the embodiment comprises wiring terminals of three phase lines, the types of wiring errors of various electric energy meters can be simulated by inserting and pulling out plug-in wires, after a person to be trained measures the phase voltage, the current and the phase angle parameter of each phase flowing into the electric energy meter from a three-phase line, the type of the wiring error between the electric energy meter and the three-phase line can be determined according to parameter information, after the type of the wiring error is determined, the wiring condition between the electric energy meter and the three-phase line can be visually seen according to the wiring principle training device, therefore, the person to be trained can correspond the type of the wiring error reflected by the parameter information to the specific wiring condition, and the relation between theoretical knowledge and actual work is enhanced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A wiring principle training device, comprising: the system comprises an electric energy meter, a wiring module and a three-phase circuit;
the wiring module at least comprises a first wiring terminal and a second wiring terminal, the first wiring terminal is connected with the electric energy meter, and the second wiring terminal is connected with the three-phase line;
the plugging lead is used for being inserted into or pulled out of at least one of the first wiring terminal or the second wiring terminal so as to change the wiring state of the wiring principle training device.
2. The wiring principle training device as claimed in claim 1, wherein the wiring module further comprises a third wiring terminal, the first wiring terminal and the third wiring terminal are respectively arranged in a row, and the third wiring terminal is located between the first wiring terminal and the second wiring terminal.
3. The wiring principle training device as claimed in claim 2, further comprising a junction box, wherein the electric energy meter is connected with the first wiring terminal through the junction box.
4. The wiring principle training device according to claim 2, further comprising a current transformer;
the second connecting terminal comprises a plurality of voltage connecting terminals and a plurality of current connecting terminals; the voltage wiring terminal is respectively connected with a first phase line, a second phase line, a third phase line and a neutral line of the three-phase circuit;
the current transformer is used for detecting the current of the three-phase line, and the current wiring terminal is correspondingly connected with the output end of the current transformer.
5. The wiring principle training device as claimed in claim 2, further comprising a wiring board, wherein the first wiring terminal, the second wiring terminal and the third wiring terminal are arranged on the wiring board, and after the plug-in wires are inserted into the first wiring terminal, the second wiring terminal or the third wiring terminal, the plug-in wires are positioned on the back surface of the wiring board; the wiring board comprises an electrochromic glass plate and an operating switch, and the operating switch is used for controlling the state of the wiring board to be transparent or non-transparent.
6. The wiring principle training device as claimed in claim 1, further comprising a power conversion module, wherein an input end of the power conversion module is electrically connected with a low-voltage direct-current power supply, and an output end of the power conversion module is connected with the three-phase line.
7. The wiring principle training device as claimed in claim 6, wherein the power conversion module comprises an inverter circuit, a phase shift circuit and an arithmetic circuit;
the inverter circuit is connected with the phase-shifting circuit and is used for inverting the direct current signal into a sinusoidal alternating current signal;
the phase shift circuit is connected with the operational circuit and is used for separating the sinusoidal alternating current signal into three-phase symmetrical sinusoidal alternating current signals;
the operation circuit is used for separating three-phase symmetrical sine alternating current signals into three-phase voltage signals.
8. The wiring principle training apparatus according to claim 3, wherein the electric energy meter includes a first unit, a second unit, and a third unit; the junction box comprises a first phase line terminal, a second phase line terminal, a third phase line terminal and a middle line terminal;
a first end of the first unit is electrically connected with the first phase line terminal, and a second end of the first unit is electrically connected with the neutral line terminal;
a first end of the second cell is electrically connected to the second phase terminal and a second end of the second cell is electrically connected to the neutral terminal;
the first end of the third unit is electrically connected with the third phase line terminal, and the second end of the third unit is electrically connected with the neutral line terminal.
9. The wiring principle training device of claim 8, wherein the first wiring terminal comprises ten terminals; the second connecting terminal and the third connecting terminal are respectively identical to the first connecting terminal in structure;
a first terminal of the first wiring terminal is electrically connected with a voltage terminal of the first phase line terminal, and a second terminal and a third terminal of the first wiring terminal are respectively electrically connected with two current terminals of the first phase line terminal;
a fourth terminal of the first wiring terminal is electrically connected with a voltage terminal of the second phase terminal, and a fifth terminal and a sixth terminal of the first wiring terminal are respectively electrically connected with two current terminals of the second phase terminal;
a seventh terminal of the first connection terminal is electrically connected with a voltage terminal of the third phase line terminal, and an eighth terminal and a ninth terminal of the first connection terminal are respectively electrically connected with two current terminals of the third phase line terminal;
the tenth terminal of the first connection terminal is electrically connected to the neutral terminal of the junction box.
10. The wiring principle training device according to claim 9, comprising a first current transformer, a second current transformer, and a third current transformer;
the output end of the first current transformer is electrically connected with the second end and the third end of the second wiring terminal;
the output end of the second current transformer is electrically connected with the fifth end and the sixth end of the second wiring terminal;
and the output end of the third current transformer is electrically connected with the eighth end and the ninth end of the second wiring terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110214579.1A CN113012540A (en) | 2021-02-25 | 2021-02-25 | Wiring principle training device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110214579.1A CN113012540A (en) | 2021-02-25 | 2021-02-25 | Wiring principle training device |
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| CN113012540A true CN113012540A (en) | 2021-06-22 |
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| CN202110214579.1A Pending CN113012540A (en) | 2021-02-25 | 2021-02-25 | Wiring principle training device |
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