CN213903775U - Three-phase electricity utilization detector - Google Patents
Three-phase electricity utilization detector Download PDFInfo
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- CN213903775U CN213903775U CN202023169670.6U CN202023169670U CN213903775U CN 213903775 U CN213903775 U CN 213903775U CN 202023169670 U CN202023169670 U CN 202023169670U CN 213903775 U CN213903775 U CN 213903775U
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- 238000007689 inspection Methods 0.000 claims abstract description 20
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- 230000003993 interaction Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 description 13
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Abstract
The utility model discloses a three-phase electricity utilization inspection tester, which comprises a measuring host, a voltage transformer and a current transformer, wherein the measuring host comprises an electric energy measuring unit, a central processing unit, a display unit and a power supply unit; the voltage transformer and the current transformer are both connected with the electric energy measuring unit, the central processing unit and the display unit are sequentially connected, and the power supply unit supplies power to the electric energy measuring unit and the central processing unit; the central processing unit is used for obtaining electric parameters according to voltage and current data collected by the voltage transformer and the current transformer, obtaining vector data of the measured voltage and current, and displaying a vector diagram, electric parameters and a wiring analysis result of the measured voltage and current through the display unit. The device adopts modularization hardware to realize the inspection of conventional power consumption electric power parameter, and simple structure is convenient, and the cost is lower.
Description
Technical Field
The utility model relates to an electric power detects auxiliary assembly technical field, in particular to three-phase power consumption detector.
Background
With the annual increase of the electricity consumption of various industries, the requirements on the accuracy of an electric power and energy metering system and the working efficiency of metering personnel are higher and higher. The work of power enterprises is moving towards standardization and intellectualization. For the test work of the traditional metering system, the manual test is carried out by using equipment such as a volt-ampere meter, a phase sequence meter and the like, and the defects of large error, judgment error and the like exist. A new generation of technically mature products is urgently needed to replace the traditional test mode of the metering system.
The existing equipment is complex and unsafe in manual operation, and the wiring condition is easy to be judged by people to be wrong, so that economic loss is caused.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a three-phase electricity inspection tester, the device adopt the inspection that conventional power consumption electric power parameter was realized to the modularization hardware, and simple structure is convenient, and the cost is lower.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a three-phase electricity utilization inspection tester comprises a measuring host, a voltage transformer and a current transformer, wherein the measuring host comprises an electric energy measuring unit, a central processing unit, a display unit and a power supply unit;
the voltage transformer and the current transformer are both connected with the electric energy measuring unit, the central processing unit and the display unit are sequentially connected, and the power supply unit supplies power to the electric energy measuring unit and the central processing unit;
and the central processing unit is used for obtaining electric parameters, judging a wiring result and vector data of voltage and current according to the voltage and current data acquired by the voltage transformer and the current transformer, and displaying the electric parameters, the judgment result and the vector data through the display unit.
Optionally, the power supply unit uses an input voltage as an external power supply.
Optionally, the display unit adopts an LCD display screen.
Optionally, a power protection circuit is built in the measurement host, and a ship-shaped switch is arranged on the side surface of the host device.
Optionally, the electric energy measuring unit includes a measuring and metering circuit and a measuring loop;
the measurement metering circuit adopts a photoelectric coupler for isolation, and the measurement loop adopts an operational amplifier for voltage conversion.
Optionally, the measurement host is further provided with a wiring panel, and the wiring panel comprises a voltage wiring panel, a current wiring panel and a wiring clamp wiring panel;
a voltage wiring hole on the voltage wiring panel is connected with the voltage transformer, and the voltage wiring hole is used for connecting an external lead to a meter tail voltage terminal of the electric energy meter;
the current wiring hole on the current wiring panel is connected with the current transformer and is used for externally connecting the terminal strip connecting piece to a current wire of the electric energy meter;
and a clamp wiring hole on the wiring clamp wiring panel is connected with the electric energy measuring unit, and the clamp wiring hole is used for externally connecting a clamp current transformer to a current wire of the electric energy meter.
Optionally, the voltage connection panel is provided with a Ua connection hole, a Ub connection hole, a Uc connection hole and a Un connection hole;
the voltage wiring panel is provided with an area Ia+Wiring hole, Ib+Wiring hole, Ic+Wiring hole, Ia-Wiring hole, Ib-Wiring hole, Ic-A wiring hole;
the voltage wiring panel is provided with a clamp Ia wiring hole, a clamp Ib wiring hole and a clamp Ic wiring hole.
Optionally, the display unit includes a storage unit and a human-computer interaction unit; the storage unit and the man-machine interaction unit are both connected with the central processing unit.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses three-phase electricity inspection tester through the combination of a plurality of modules, can judge various metering device abnormal conditions, avoids losing the electric quantity scheduling problem and takes place, and the comprehensive cost reduces by a wide margin. And only need insert voltage clamp, current clamp in the secondary circuit assigned position, the apparatus measures and analyzes automatically, give the wire connection and distinguish the result directly, and have detailed written explanation. The information of the metering device and the field test data are directly stored in the equipment and can be checked at any time. The equipment directly integrates the functions of precision detection, wiring judgment and the like of the metering device into the metering system test equipment, displays the functions, simplifies the field operation steps and ensures the personal safety and the equipment safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic block diagram of a three-phase electricity utilization inspection tester;
FIG. 2 is a block diagram of the internal structure of the power test unit;
fig. 3 is a block diagram of the internal structure of the display unit.
FIG. 4 is a test chart of three-phase three-wire high voltage meter connected via a clamp meter;
fig. 5 is a direct access test chart of a three-phase four-wire meter.
Detailed Description
In order to make the purpose and technical scheme of the utility model clearer and more convenient to understand. The present invention will be described in further detail with reference to the following drawings and examples, wherein the specific examples are provided for the purpose of illustration only and are not intended to be limiting.
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings and specific embodiments, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
The utility model relates to a three-phase electricity utilization inspection tester, which comprises a measuring host, a voltage transformer and a current transformer, wherein the measuring host comprises an electric energy measuring unit, a central processing unit, a display unit and a power supply unit;
the voltage transformer and the current transformer are both connected with the electric energy measuring unit, the central processing unit and the display unit are sequentially connected, and the power supply unit supplies power to the electric energy measuring unit and the central processing unit;
the central processing unit is used for obtaining electric parameters according to voltage and current data collected by the voltage transformer and the current transformer, obtaining vector data of measured voltage and current, displaying a vector diagram of the measured voltage and current through the display unit, and judging a measurement result.
The three-phase electricity utilization inspection tester mainly uses a high-precision and high-linearity voltage transformer and a pincerlike current transformer, and judges the running condition of equipment by analyzing the measured voltage, current, phase angle, power and power factor; and realizing data memory through a built-in database, and recording the measured data and the wiring condition.
The measurement host computer mainly generates measurement data by collecting voltage and current and calculating parameters such as active power, reactive power, harmonic wave and the like. The test wire and the pincerlike current transformer mainly input voltage, current and pulse signals of the electric energy meter to be calibrated into a host machine for the host machine to carry out measurement and test. The built-in power protection circuit of the equipment can effectively prevent the power line from being wrongly connected or the high voltage from being wrongly connected to cause the damage of the electrical element, the equipment is started by hardware, and the starting switch is arranged on the side surface of the host equipment and is a ship-shaped switch.
As shown in fig. 2, the electric energy measuring unit comprises a measuring and metering circuit and a measuring loop; the measurement metering circuit adopts a photoelectric coupler for isolation, and the measurement loop adopts an operational amplifier for voltage conversion. The measuring and metering circuit mainly performs measurement work for electric parameters, the circuit is internally isolated by adopting an optical coupler to carry out strong and weak current, the influence of a strong current circuit on the measurement of the electric parameters is effectively reduced, a measuring loop adopts a precise operational amplifier to carry out voltage conversion, the related operational amplifier is basically arranged near a voltage current socket, the influence of output impedance on transmission signals can be greatly reduced, and the output capacity can be properly improved.
The working principle is as follows: the detected current and voltage are processed by the sampler to form unique power pulses, and the pulse signals are transmitted to the central processing unit. After being processed by the central processing unit, whether the metering device accurately meters can be judged. Meanwhile, the central processing unit can draw a phasor diagram to judge whether the wiring of the electric energy meter is correct or not.
As shown in fig. 1, the present invention has the following specific functions.
1) Voltage sampling
The voltage transformer is used for converting the external voltage into a small voltage which can be processed, and can play a role in isolation under the normal condition.
2) Current sampling
The current transformer and the peripheral circuit can help the current to be converted into small current which can be measured, and the current clamp is also one of application tools when low-voltage verification is carried out.
3) Electric energy measuring unit
Based on the sampling of I, U, a corresponding value of P, U, I is formed.
4) Central processing unit
Various data are processed and analyzed.
5) Display unit
The LCD is applied because the on-site calibration instrument needs to display various data, phasor diagram, and complex information such as wiring analysis result.
6) Display of power supply
The external power supply is converted into the working power supply, which is a necessary item in the operation, and the electricity utilization inspection instrument can adopt the input voltage as the external power supply.
FIG. 4 is a three-phase three-wire high voltage meter connected to a test chart via a clamp meter; the three-phase four-wire meter of fig. 5 is directly connected to the test chart.
The measuring host is also provided with a wiring panel, and the wiring panel comprises a voltage wiring panel, a current wiring panel and a wiring clamp wiring panel;
a voltage wiring hole on the voltage wiring panel is connected with the voltage transformer, and the voltage wiring hole is used for connecting an external lead to a meter tail voltage terminal of the electric energy meter;
the current wiring hole on the current wiring panel is connected with the current transformer and is used for externally connecting the terminal strip connecting piece to a current wire of the electric energy meter;
and a clamp wiring hole on the wiring clamp wiring panel is connected with the electric energy measuring unit, and the clamp wiring hole is used for externally connecting a clamp current transformer to a current wire of the electric energy meter.
Specifically, the voltage wiring panel is provided with a Ua wiring hole, a Ub wiring hole, a Uc wiring hole and a Un wiring hole;
the voltage wiring panel is provided with an Ia + wiring hole, an Ib + wiring hole, an Ic + wiring hole, an Ia-wiring hole, an Ib-wiring hole and an Ic-wiring hole;
the voltage wiring panel is provided with a clamp Ia wiring hole, a clamp Ib wiring hole and a clamp Ic wiring hole.
The utility model discloses intelligence three-phase electricity inspection tester is equipped with the voltage transformer and the pincerlike current transformer of high accuracy, high linearity, carries out the accuracy measurement to voltage, electric current, phase angle, frequency, power factor isoelectric parameter of measurement secondary circuit. The vector diagram of the voltage and the current to be measured can be displayed, the measurement result is analyzed, 48 wiring modes can be automatically judged in the three-phase three-wire wiring mode, and 96 wiring modes can be automatically judged in the three-phase four-wire wiring mode. Whether the electric energy meter has the phenomena of element voltage loss and undervoltage can be judged according to the acquired voltage data; judging whether the electric energy meter has the phenomena of current shortage and reverse current connection or not according to the acquired current data; determining a phase sequence by analyzing phase differences among the line voltages, wherein the phase sequence is a positive phase sequence if the phase difference is 300 degrees, and the phase sequence is a negative phase sequence if the phase difference is 60 degrees; and the phase angle between the line voltage and the current can be used for judging the line by utilizing the line conduction principle, and if the line is connected in a wrong way, the collected signal has errors. The specific wiring judgment adopts the existing wiring judgment module, and the actual wiring result is input into the wiring judgment module and the result is directly output. The specific judgment is the existing method, and the specific software development is not carried out.
The device is mainly used for measuring the related parameters of the secondary circuit of the electric energy metering device, automatically performs wiring judgment, ensures that the metering device operates normally, records the information of the metering device and measured data, and improves the working efficiency of metering personnel.
Wherein, as shown in fig. 3, the display unit comprises a storage unit and a human-computer interaction unit. The storage unit and the man-machine interaction unit are both connected with the central processing unit. The storage unit is used for storing the measurement data in real time so as to be convenient for calling and checking at any time, and the man-machine interaction unit is used for corresponding information such as the electric energy meter number, the house number and the house name of the metering device.
When the newly-installed metering device is checked, the staff enters information such as the electric energy meter number, the house name and the like of the corresponding metering device, and the inspection tester can record the measured data and conveniently call and check the data at any time.
The utility model discloses following beneficial effect has:
1. and the data such as three-phase current, voltage, power factor, phase angle degree and the like are accurately measured on site.
2. The 32 th harmonic content of three-phase voltage and current in the power grid can be tested and displayed by visual diagrams.
3. The connection judgment provides a vector diagram, a connection diagram, a compensation electric quantity formula, a compensation coefficient and a detailed text description.
4. Possess functions such as metering device archival storage and record equipment under test position, make things convenient for the power company staff to transfer at any time and look over.
5. Compare traditional measurement detection mode, automatic analysis has promoted the accuracy that on-the-spot metering device detected by a wide margin, avoids causing economic loss because of the metering device trouble, maintains electric power company's interests.
The utility model detects and analyzes the secondary loop parameter of the on-site metering device, judges the wiring condition and supplements the electric quantity; the metering device file can be input and the measured data can be stored to form a metering device information base.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Above, only the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within range of protection.
The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify or equally replace the specific embodiments of the present invention, and these modifications or equivalents do not depart from the spirit and scope of the present invention, which is all within the protection scope of the claims of the present invention.
Claims (8)
1. The three-phase electricity utilization inspection tester is characterized by comprising a measuring host, a voltage transformer and a current transformer, wherein the measuring host comprises an electric energy measuring unit, a central processing unit, a display unit and a power supply unit;
the voltage transformer and the current transformer are both connected with the electric energy measuring unit, the central processing unit and the display unit are sequentially connected, and the power supply unit supplies power to the electric energy measuring unit and the central processing unit;
and the central processing unit is used for obtaining electric parameters, judging a wiring result and vector data of voltage and current according to the voltage and current data acquired by the voltage transformer and the current transformer, and displaying the electric parameters, the judgment result and the vector data through the display unit.
2. The inspection tester of claim 1 wherein the power supply unit uses the input voltage as an external power supply.
3. The inspection tester for three-phase electricity consumption according to claim 1, wherein the display unit is an LCD display screen.
4. The inspection tester for three-phase electricity consumption according to claim 1, wherein the measurement host is internally provided with a power protection circuit, and a boat-shaped switch is arranged on the side surface of the host device.
5. The three-phase electricity utilization inspection tester according to claim 1, wherein the electric energy measuring unit comprises a measuring and metering circuit and a measuring loop;
the measurement metering circuit adopts a photoelectric coupler for isolation, and the measurement loop adopts an operational amplifier for voltage conversion.
6. The inspection tester for three-phase electricity consumption according to claim 1, wherein the measurement host is further provided with a wiring panel, and the wiring panel comprises a voltage wiring panel, a current wiring panel and a wiring clamp wiring panel;
a voltage wiring hole on the voltage wiring panel is connected with the voltage transformer, and the voltage wiring hole is used for connecting an external lead to a meter tail voltage terminal of the electric energy meter;
the current wiring hole on the current wiring panel is connected with the current transformer and is used for externally connecting the terminal strip connecting piece to a current wire of the electric energy meter;
and a clamp wiring hole on the wiring clamp wiring panel is connected with the electric energy measuring unit, and the clamp wiring hole is used for externally connecting a clamp current transformer to a current wire of the electric energy meter.
7. The three-phase electricity inspection instrument according to claim 6,
the voltage wiring panel is provided with a Ua wiring hole, a Ub wiring hole, a Uc wiring hole and a Un wiring hole;
the voltage wiring panel is provided with an area Ia+Wiring hole, Ib+Wiring hole, Ic+Wiring hole, Ia-Wiring hole, Ib-Wiring hole, Ic-A wiring hole;
the voltage wiring panel is provided with a clamp Ia wiring hole, a clamp Ib wiring hole and a clamp Ic wiring hole.
8. The three-phase electricity utilization inspection tester according to claim 1, wherein the display unit comprises a storage unit and a human-computer interaction unit; the storage unit and the man-machine interaction unit are both connected with the central processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023169670.6U CN213903775U (en) | 2020-12-24 | 2020-12-24 | Three-phase electricity utilization detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023169670.6U CN213903775U (en) | 2020-12-24 | 2020-12-24 | Three-phase electricity utilization detector |
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| Publication Number | Publication Date |
|---|---|
| CN213903775U true CN213903775U (en) | 2021-08-06 |
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| CN202023169670.6U Active CN213903775U (en) | 2020-12-24 | 2020-12-24 | Three-phase electricity utilization detector |
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| CN (1) | CN213903775U (en) |
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