CN214409258U - Polarity testing device of multifunctional current transformer - Google Patents
Polarity testing device of multifunctional current transformer Download PDFInfo
- Publication number
- CN214409258U CN214409258U CN202120432929.7U CN202120432929U CN214409258U CN 214409258 U CN214409258 U CN 214409258U CN 202120432929 U CN202120432929 U CN 202120432929U CN 214409258 U CN214409258 U CN 214409258U
- Authority
- CN
- China
- Prior art keywords
- signal
- unit
- detection
- power supply
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 73
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses a multi-functional current transformer polarity testing arrangement relates to aspects such as current transformer polarity test. At least comprises a signal transmitting sub-device and a signal detecting sub-device; the signal transmitting sub-device at least comprises a signal generating unit, a transmitting control unit and a transmitting power supply unit; the signal generation unit is electrically connected with the emission control unit, and the emission power supply unit is electrically connected with the signal generation unit and the emission control unit; the signal detection sub-device at least comprises a signal detection unit, a display unit, a detection control unit and a detection power supply unit; the detection control unit is electrically connected with the signal detection unit and the display unit, and the detection power supply unit is electrically connected with the detection control unit, the signal detection unit and the display unit. The utility model discloses effectively ensure the safe and reliable operation of substation equipment.
Description
Technical Field
The utility model discloses a multi-functional current transformer polarity testing arrangement relates to aspects such as current transformer polarity test.
Background
The current transformer is one of the key devices for realizing electric energy conversion in the power system, and the accuracy of the current transformer directly influences the action accuracy of the protection device. At present, secondary protection personnel need to perform polarity tests on a transformer in the maintenance work of the current transformer so that the secondary circuit wiring of the transformer meets the polarity requirements of protection and measurement. In addition, although the existing device such as a transformer field tester can well detect the polarity of the current transformer, due to the need of introducing a standard source, a standard transformer and the like, the instrument and the equipment are too much and heavy, the test complexity is increased, and the test operability is reduced. In addition, the current special instrument for testing the polarity of the current transformer only supports sending pulse signals with simple patterns, so that interphase interference is easily caused, the detection accuracy is reduced, and the accident risk is increased.
SUMMERY OF THE UTILITY MODEL
The utility model is directed to the above problem, a multi-functional current transformer polarity testing arrangement is provided, relate to aspects such as current transformer polarity test.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a polarity testing device of a multifunctional current transformer at least comprises a signal transmitting sub-device and a signal detecting sub-device;
the signal transmitting sub-device at least comprises a signal generating unit, a transmitting control unit and a transmitting power supply unit; the signal generation unit is electrically connected with the emission control unit, and the emission power supply unit is electrically connected with the signal generation unit and the emission control unit;
the signal generating unit is used for generating and transmitting a low-voltage signal; the emission control unit is used for controlling the operation of the signal generation unit; the transmitting power supply unit is used for supplying electric energy to the signal generating unit and the transmitting control unit;
the signal detection sub-device at least comprises a signal detection unit, a display unit, a detection control unit and a detection power supply unit; the detection power supply unit is electrically connected with the detection control unit, the signal detection unit and the display unit;
the signal detection unit is used for receiving and analyzing the characteristics of the low-voltage signal; the signal detection unit supports the detection of a single-channel signal; the display unit is used for prompting the polarity information of the current transformer; the detection control unit is used for controlling the signal detection unit and the display unit; the detection power supply unit is used for supplying electric energy to the signal detection unit, the display unit and the detection control unit.
Optionally, the electronic device further comprises a charging sub-device, and the charging sub-device is electrically connected with the emission power supply unit and/or the detection power supply unit.
Optionally, the signal detection device further comprises a connecting line, when in use, the output port of the signal emission sub-device is respectively connected to the three phases of the primary side current transformer A, B, C, and the input port of the signal detection sub-device is respectively connected to the port of the secondary side current transformer A, B, C, which needs to detect the polarity.
Optionally, the system further comprises a remote controller; the remote controller is connected with the emission control unit and the detection control unit in a wireless remote control way.
Optionally, the emission power supply unit and the detection power supply unit both include a battery and a related circuit.
Optionally, the display unit at least includes all or part of a display screen, a light bulb and a loudspeaker.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses the signal of different range, frequency and wave form can be matchd simultaneously to signalling sub-device and signal detection sub-device on the three-phase port and detect, reduces interference and misjudgement rate, and more convenient, quick, accurate detection goes out current transformer secondary side polarity to can make mutual-inductor secondary circuit wiring satisfy protection and measuring polarity requirement, effectively ensure the safe and reliable operation of substation equipment.
Drawings
The drawings shown in the present application serve to provide a further understanding of the invention, constituting a part of the present application, the exemplary embodiments and descriptions of which are used to explain the present invention, and do not constitute an undue limitation of the invention.
In the drawings:
fig. 1 is a schematic block diagram of a signal transmitting sub-device in a multifunctional current transformer polarity testing device of the present invention.
Fig. 2 is the utility model discloses a signal detection sub-device's among multi-functional current transformer polarity testing arrangement functional block diagram.
Fig. 3 is the utility model discloses a multi-functional current transformer polarity testing arrangement's wiring schematic diagram.
Fig. 4 is a schematic diagram of the wiring of embodiment 1 of the polarity testing apparatus for a multifunctional current transformer of the present invention.
Fig. 5 is a schematic diagram of the wiring of embodiment 2 of the polarity testing apparatus for a multifunctional current transformer of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model relates to a polarity testing device of a multifunctional current transformer, which at least comprises a signal transmitting sub-device 1 and a signal detecting sub-device 2;
the signal transmitting sub-device 1 at least comprises a signal generating unit 11, a transmitting control unit 12 and a transmitting power supply unit 13;
the signal generating unit 11 is mainly used for generating and transmitting a low voltage signal, wherein the waveform of the low voltage signal includes but is not limited to a square wave, a sine wave, a sawtooth wave and other waveforms;
the sending form of the low-voltage signal can also comprise a single signal, a plurality of signals and a continuous signal, wherein the single signal is to send only one period segment in the signal, and the sending is automatically stopped after the sending of one period segment is finished; the multiple signals are sent to a plurality of continuous periodic segments in the signals, and the sending is automatically stopped after the sending of the plurality of continuous periodic segments is finished; the continuous signal means that the signal is continuously transmitted and cannot be automatically stopped;
the signal generating unit 11 may support sending a single-path signal, or simultaneously support sending at least three paths of same or different low voltage signals;
the transmission control unit 12 is mainly used for controlling the operation of the signal generation unit 11 and can support a wired and/or wireless control mode; the transmitting power supply unit 13 is mainly used for supplying electric energy to the signal generating unit 11 and the transmitting control unit 12, and comprises a battery and related circuits;
the signal detection sub-device 2 at least comprises a signal detection unit 21, a display unit 22, a detection control unit 23 and a detection power supply unit 24;
the signal detection unit 21 is mainly used for receiving and analyzing the characteristics of the low-voltage signal, such as amplitude, frequency, waveform, phase and the like; the signal detection unit 21 may support detecting a single-path signal, or simultaneously support detecting at least three paths of the same or different low voltage signals; the display unit 22 is mainly used for prompting information such as polarity of the current transformer and at least comprises all or part of a display screen, a bulb and a loudspeaker;
the detection control unit 23 is mainly used for controlling the signal detection unit 21 and the display unit 22; the detection power supply unit 24 is mainly used for supplying power to the signal detection unit 21, the display unit 22 and the detection control unit 23, and comprises a battery and related circuits;
the device also comprises an electronic charging device, a connecting wire and a remote controller; the charging electronics are electrically connected to the transmission power supply unit 13 and/or the detection power supply unit 24.
When the device is used, the output ports of the signal transmitting sub-device 1 are respectively connected to the three phases of the primary side current transformer A, B, C, and the input ports of the signal detecting sub-device 2 are respectively connected to the ports of the secondary side current transformer A, B, C which need to detect the polarity.
The remote controller is connected with the emission control unit 12 and the detection control unit 23 in a wireless remote control way.
Also includes the corresponding method of use;
the signal transmitting sub-device 1 and the signal detecting sub-device 2 can be directly interconnected, and self-detection of the device are realized;
the signal transmitting sub-device 1 can be used together with the signal detecting sub-device 2, and the signal detecting sub-device 2 can also be used separately.
The present invention will be described in detail with reference to the accompanying fig. 2 to further understand the objects, schemes and functions of the present invention, but the attached drawings and embodiments are not intended to limit the protection scope of the present invention.
The output ports of the signal transmitting sub-device 1 are respectively connected to the A, B, C three phases on the primary side, and the input ports of the signal detecting sub-device 2 are respectively connected to the ports of the current transformer A, B, C phase on the secondary side, which need to detect the polarity;
a) the signal transmitting sub-device 1 and the signal detecting sub-device 2 are connected by ensuring in-phase coupling through a current transformer, namely, an A-phase port of the signal transmitting sub-device 1 is coupled with an A-phase port of the signal detecting sub-device 2, a B-phase port is coupled with a B-phase port, and a C-phase port is coupled with a C-phase port.
b) The device can detect three ports at the same time, and can flexibly select to use any one or two ports according to the requirement.
Operating the signal transmitting sub-device 1 by using a remote controller, setting the amplitude, frequency and waveform of three signals respectively output on the primary side A, B, C at the moment, setting the form of three sending signals to be a single signal or multiple signals or a continuous signal respectively, and then transmitting the signals;
c) the amplitude, frequency and waveform of the three-way signal and the form of the transmitted signal may be the same or different.
On the signal detection sub-device 2, parameters of signal detection, including sampling rate, sampling time, amplitude range, trigger conditions, filtering window and the like, are adjusted, and judgment of the polarity of the current transformer port prompted by a display screen, a bulb or a loudspeaker is observed.
d) The display screen may display a measurement of the polarity of the polyphase port and/or display a comparison of the transmitted and received signal waveforms, and/or other more information.
e) The bulb or speaker may simply indicate the currently measured polarity determination for each phase port of the current transformer.
Example 1
Use a multi-functional current transformer polarity testing arrangement measures current transformer A, B, C three-phase port polarity.
Firstly, respectively connecting the output ports of the signal transmitting sub-device 1 to the primary side A, B, C three phases, and respectively connecting the input ports of the signal detecting sub-device 2 to the ports of the secondary side current transformer A, B, C phases needing polarity detection;
step two, operating the signal transmitting sub-device 1 by using a remote controller, and setting a square wave positive pulse signal with the peak amplitude of 1.5V and the frequency of 100Hz, which is output at the primary side phase A at the moment, wherein the signal transmitting form is a continuous signal; setting a square wave positive pulse signal with the peak amplitude of 3V and the frequency of 200Hz and a continuous signal transmission form at the primary side B phase output at the moment; setting a sawtooth wave negative pulse signal with the peak amplitude of 1.5V and the frequency of 25Hz at the primary side C phase output at the moment, wherein the signal emission form is a continuous signal;
and step three, on the signal detection sub-device 2, adjusting the parameters of signal detection, setting the sampling rate to be 1000Hz, setting the sampling time to be 2 seconds, setting the amplitude range to be-10V to 10V, setting the trigger condition to be continuous trigger, setting the trigger threshold to be 0.01V, using a 1MHz low-pass filter, observing the detection result, and directly displaying the polarity of the detected port of the three phases of the current transformer A, B, C on a display screen after matching calculation.
Example 2
Use a multi-functional current transformer polarity testing arrangement carries out the self-checking.
The method comprises the following steps that firstly, the output port of a signal transmitting sub-device 1 is respectively butted with the input port of a signal detecting sub-device 2, the output of an A phase is connected with the input of the A phase, the output of a B phase is connected with the input of the B phase, and the output of the B phase is connected with the input of the B phase;
step two, in the signal transmitting sub-device 1, a self-checking function default setting is adopted or a square wave positive pulse signal with the peak amplitude of 1.5V and the frequency of 100Hz is output by the signal transmitting sub-device 1A at the moment, and the signal transmitting form is a single signal; setting a square wave positive pulse signal with the peak amplitude of 1.5V and the frequency of 25Hz output by the signal transmitting sub-device 1B phase at the moment, wherein the signal transmitting form is a single signal; setting a square wave negative pulse signal with the peak amplitude of 1.5V and the frequency of 25Hz output by the signal transmitting sub-device 1C phase at the moment, wherein the signal transmitting form is a single signal;
and step three, setting self-checking default parameters or adjusting parameters of signal detection on the signal detection sub-device 2, setting the sampling rate to be 500Hz, setting the sampling time to be 0.1 second, setting the amplitude range to be-10V to 10V, setting the trigger condition to be continuous trigger, setting the trigger threshold to be 0.01V, using a low-pass filter of 1MHz, observing the detection result, and after matching calculation, enabling a loudspeaker to report whether the state of the device is normal by human voice and simultaneously flashing the light for prompting.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application 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; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A polarity testing device of a multifunctional current transformer is characterized by at least comprising a signal transmitting sub-device and a signal detecting sub-device;
the signal transmitting sub-device at least comprises a signal generating unit, a transmitting control unit and a transmitting power supply unit; the signal generation unit is electrically connected with the emission control unit, and the emission power supply unit is electrically connected with the signal generation unit and the emission control unit;
the signal generating unit is used for generating and transmitting a low-voltage signal; the emission control unit is used for controlling the operation of the signal generation unit; the transmitting power supply unit is used for supplying electric energy to the signal generating unit and the transmitting control unit;
the signal detection sub-device at least comprises a signal detection unit, a display unit, a detection control unit and a detection power supply unit; the detection power supply unit is electrically connected with the detection control unit, the signal detection unit and the display unit;
the signal detection unit is used for receiving and analyzing the characteristics of the low-voltage signal; the signal detection unit supports the detection of a single-channel signal; the display unit is used for prompting the polarity information of the current transformer; the detection control unit is used for controlling the signal detection unit and the display unit; the detection power supply unit is used for supplying electric energy to the signal detection unit, the display unit and the detection control unit.
2. The polarity testing device of the multifunctional current transformer of claim 1, further comprising an electronic charging device electrically connected to the emission power supply unit and/or the detection power supply unit.
3. The polarity testing device of claim 1, further comprising a connecting line, wherein in use, the output ports of the signal transmitting sub-device are respectively connected to the three phases of the primary side current transformer A, B, C, and the input ports of the signal detecting sub-device are respectively connected to the ports of the secondary side current transformer A, B, C, which are required to detect polarity.
4. The polarity testing device of the multifunctional current transformer of claim 1, further comprising a remote controller; the remote controller is connected with the emission control unit and the detection control unit in a wireless remote control way.
5. The multifunctional current transformer polarity testing device of claim 1, wherein the transmitting power supply unit and the detecting power supply unit both comprise a battery and related circuitry.
6. The polarity testing device of claim 1, wherein said display unit comprises all or part of a display screen, a light bulb, and a speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120432929.7U CN214409258U (en) | 2021-02-26 | 2021-02-26 | Polarity testing device of multifunctional current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120432929.7U CN214409258U (en) | 2021-02-26 | 2021-02-26 | Polarity testing device of multifunctional current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214409258U true CN214409258U (en) | 2021-10-15 |
Family
ID=78027932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120432929.7U Active CN214409258U (en) | 2021-02-26 | 2021-02-26 | Polarity testing device of multifunctional current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214409258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167318A (en) * | 2021-11-09 | 2022-03-11 | 广西电网有限责任公司柳州供电局 | Current transformer wireless polarity judgment device and method capable of supplying power to negative control terminal |
-
2021
- 2021-02-26 CN CN202120432929.7U patent/CN214409258U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167318A (en) * | 2021-11-09 | 2022-03-11 | 广西电网有限责任公司柳州供电局 | Current transformer wireless polarity judgment device and method capable of supplying power to negative control terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103105572B (en) | Device for testing IGBT module | |
| CN203929904U (en) | The charged solution loop device of a kind of straight-flow system | |
| US10197612B2 (en) | Continuity test system and method | |
| CN203572887U (en) | Wireless three dimensional electric field measurement alarm device | |
| CN105676066A (en) | Cable fault locating eliminating device and method | |
| CN105510773A (en) | Earth fault detection device for direct current system | |
| CN111308299B (en) | Converter valve closed loop test system and method | |
| CN202956428U (en) | Residual voltage testing device | |
| CN104166072A (en) | Intelligent polarity detection device and method for four-star type voltage transformer | |
| CN214409258U (en) | Polarity testing device of multifunctional current transformer | |
| CN102004213B (en) | Direct-detection type intelligent direct-current system insulation and state diagnosis instrument | |
| CN103076560B (en) | Electrical test equipment non-contact measurement combination unit and application thereof | |
| CN101504448A (en) | Integral polarity test method for current mutual inductor | |
| CN203405561U (en) | Direct current power source grounding fault searching device | |
| CN203101571U (en) | Secondary common loop multipoint earth fault testing device | |
| CN217060483U (en) | Mutual inductor secondary loop tester for protection device | |
| CN204789842U (en) | Line detection device | |
| CN107247177B (en) | Remote control distribution network electricity testing and grounding wire detection device | |
| CN211263720U (en) | Double-clamp-meter type direct current grounding searching instrument | |
| CN210401531U (en) | Electric safety monitoring device | |
| CN210038043U (en) | Electrified cable insulation state detection device based on high-frequency pulse voltage | |
| CN206248818U (en) | A kind of DC voltage transformer frequency response detection means | |
| CN204008956U (en) | A kind of four stars type voltage transformer (VT) intelligence device for detecting polarity | |
| CN106970259B (en) | Low-voltage alternating current wireless monitoring device | |
| CN201601464U (en) | Combined switch controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |