CN110596522B - Portable wireless current transformer polarity testing device - Google Patents
Portable wireless current transformer polarity testing device Download PDFInfo
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- CN110596522B CN110596522B CN201911077729.8A CN201911077729A CN110596522B CN 110596522 B CN110596522 B CN 110596522B CN 201911077729 A CN201911077729 A CN 201911077729A CN 110596522 B CN110596522 B CN 110596522B
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- 238000012360 testing method Methods 0.000 title claims abstract description 74
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 4
- 238000004804 winding Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The invention relates to the technical field of polarity testing of current transformers, in particular to a portable wireless polarity testing device of a current transformer, which comprises a current generating unit and a polarity display unit, wherein the current generating unit comprises a wireless receiving module, a power supply control module, a first input wire clamp, a second input wire clamp and a first power supply; the polarity display unit comprises a first insulating shell, wherein a manual testing button and at least one polarity display module are arranged on the first insulating shell, and a control module, a relay, a second power supply and a wireless transmission module are arranged in the first insulating shell. According to the invention, the wireless transmitting module and the wireless receiving module are used for realizing communication between the current generating unit and the polarity display unit, on-site wiring is not needed, and the polarity measurement can be carried out by pressing a manual test button, so that the test can be completed by a single person, the cooperation of other people is not needed, and the test flow and personnel are simplified; the invention also measures a plurality of windings at the same time, reduces the testing workload and saves the testing time.
Description
Technical Field
The invention relates to the technical field of polarity testing of current transformers, in particular to a portable wireless polarity testing device for a current transformer.
Background
The current transformer is an important electrical device of the power system, plays roles of isolating between high and low voltage systems and converting high voltage into low voltage, and has great significance for the normal operation of the equipment such as protection, measurement, metering and the like of the system due to the fact that the wiring is correct or not. The polarity error of the current transformer causes the protection misoperation of main transformer differential, bus protection differential, line longitudinal differential and the like, and simultaneously, the functions of measurement, metering and the like are also affected.
The current means for measuring the polarity of the current transformer mainly comprise a current transformer characteristic tester, a voltmeter test polarity and the like. The method for testing the polarity of the voltmeter is generally suitable for the supplementary verification of the polarity of the current transformer, and mainly has the problems of complex tool preparation flow, troublesome operation, cooperative coordination of two people and the like.
Disclosure of Invention
The invention provides a portable wireless current transformer polarity testing device, which overcomes the defects of the prior art, and can effectively solve the problems of complex testing preparation process, time and labor waste and lower efficiency in the conventional voltmeter polarity testing method.
The technical scheme of the invention is realized by the following measures: a portable wireless current transformer polarity testing device comprises a current generating unit and a polarity display unit; the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp, a second input wire clamp and a first power supply, wherein the first input wire clamp, the first power supply, the power supply control module and the second input wire clamp are sequentially connected in series, the first power supply is connected with the wireless receiving module, and the wireless receiving module is connected with the power supply control module; the polarity display unit comprises a first insulating shell, a manual testing button and at least one polarity display module are arranged on the first insulating shell, a control module, a relay, a second power supply and a wireless transmission module are arranged in the first insulating shell, the second power supply is respectively connected with the control module and a normally open contact of the relay, and the control module is respectively connected with a relay coil, a normally open contact of the relay, the wireless transmission module and the manual testing button.
The following are further optimizations and/or improvements to the above-described inventive solution:
the polarity display module comprises an ammeter, a first light emitting diode and a second light emitting diode.
The polarity display unit further comprises output terminal groups which are the same as the polarity display modules in number and in one-to-one correspondence, the output terminal groups are arranged on the first insulating shell, each output terminal group comprises a first output terminal and a second output terminal, two ends of the ammeter are respectively connected with the first output terminal and the second output terminal, the positive electrode of the first light emitting diode is connected with the first output terminal, the negative electrode of the first light emitting diode is connected with the second output terminal, the negative electrode of the second light emitting diode is connected with the first output terminal, and the positive electrode of the second light emitting diode is connected with the second output terminal.
The polarity display unit further comprises a second power supply control switch, an automatic test button, an automatic stop button and a reset button, wherein the second power supply control switch, the automatic test button, the automatic stop button and the reset button are arranged on the first insulating shell, the automatic test button, the automatic stop button and the reset button are all connected with the control module, and the second power supply control switch is connected with the second power supply.
The current generating unit further comprises a second insulating shell, the wireless receiving module, the power supply control module and the first power supply are all located inside the second insulating shell, and the first input wire clamp and the second input wire clamp are all located outside the second insulating shell.
The current generating unit further comprises a first power supply control switch for controlling the first power supply and a power supply monitoring indicator lamp capable of controlling whether the first power supply starts to supply power, wherein the first power supply and the power supply monitoring indicator lamp are arranged on the second insulating shell, and the first input wire clamp, the first power supply control switch, the first power supply, the power supply control module, the power supply monitoring indicator lamp and the second input wire clamp are sequentially connected in series.
The invention has reasonable and compact structure, is convenient to carry and convenient and flexible to use, realizes the communication between the current generating unit and the polarity display unit through the wireless transmitting module and the wireless receiving module, thereby completing the polarity test and avoiding the traditional measurement mode of dragging a longer test line; the invention has convenient installation, no field wiring is needed, and the polarity measurement can be carried out by pressing the manual test button, so that the test can be completed by a single person, the cooperation of other people is not needed, and the test flow and personnel are simplified; the invention also measures a plurality of windings at the same time, reduces the testing workload and saves the testing time.
Drawings
Fig. 1 is a schematic circuit diagram of a current generating unit according to the present invention.
Fig. 2 is a schematic circuit diagram of a polarity display unit according to the present invention.
Fig. 3 is a schematic perspective view of the current generating unit of the present invention.
Fig. 4 is a schematic perspective view of a polarity display unit according to the present invention.
Fig. 5 is a schematic diagram of the circuit connection of the polarity test of the present invention.
The codes in the drawings are respectively: 1 is a first input wire clamp, 2 is a second input wire clamp, 3 is a first insulating shell, 4 is a manual test button, 5 is an ammeter, 6 is a first light-emitting diode, 7 is a second light-emitting diode, 8 is a first output terminal, 9 is a second output terminal, 10 is an automatic test button, 11 is an automatic stop button, 12 is a reset button, 13 is a second insulating shell, 14 is a first power supply control switch, 15 is a power supply monitoring indicator lamp, 16 is a second power supply control switch, and 17 is a second power supply indicator lamp.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 3 of the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described below with reference to examples and figures:
As shown in fig. 1, 2, 3, 4 and 5, the portable wireless current transformer polarity testing device comprises a current generating unit and a polarity display unit; the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp 1, a second input wire clamp 2 and a first power supply, wherein the first input wire clamp 1, the first power supply, the power supply control module and the second input wire clamp 2 are sequentially connected in series, the first power supply is connected with the wireless receiving module, and the wireless receiving module is connected with the power supply control module; the polarity display unit comprises a first insulating shell 3, a manual testing button 4 and at least one polarity display module are arranged on the first insulating shell 3, a control module, a relay, a second power supply and a wireless transmission module are arranged in the first insulating shell 3, the second power supply is respectively connected with the control module and a normally open contact of the relay, and the control module is respectively connected with the relay coil, the normally open contact of the relay, the wireless transmission module and the manual testing button 4.
The polarity display unit is connected with the secondary side of the current transformer to be tested and is used for sending pulse current to the current generation unit and displaying the polarity test result of the current transformer to be tested after the current generation unit generates current; the manual test button 4 is used for a tester to send a test signal to the control module once; the control module is a prior known technology and can be an STC89C52RC microcontroller, and is used for receiving a test signal sent by the manual test button 4, controlling a normally open contact of the relay to complete one-time actuation according to the test signal, and sending a working command to the current generation unit through the wireless sending module according to pulse current generated by the actuation of the relay; the wireless transmission module can be a PT2262 wireless transmission module; the polarity display module can be multiple, and when the secondary side of the tested current transformer is provided with multiple windings, the polarity test can be conveniently carried out simultaneously, and the polarity display module can comprise an ammeter 5, a light emitting diode and the like and is used for displaying the polarity test result.
The current generation unit is connected with the primary side of the current transformer to be tested and is used for generating current, so that a complete loop is formed between the current transformer to be tested and the current generation unit as well as between the current transformer to be tested and the polarity display unit; the wireless receiving module can be a PT2272 wireless receiving module and is used for communication between the current generating unit and the polarity display unit; the size of the second power supply is set by practical conditions and can be 5 volts; the power supply control module is a prior known technology and can be a relay for controlling whether a circuit of the current generation unit is conducted or not to generate current, if the circuit is the relay, the wireless receiving module converts received signals into digital and analogue, and then the relay coil is electrified, so that a normally open contact of the relay is closed, and the primary side of the current transformer to be tested is conducted to generate current; the first input wire clamp 1 and the second input wire clamp 2 are used for clamping two ends of the primary side of the current transformer to be tested.
As shown in fig. 1,2 and 5, the use process of the invention is as follows:
1. clamping one end, close to a bus, of the primary side of the current transformer to be tested by the first input wire clamp 1, and clamping the other end, close to the bus, of the primary side of the current transformer to be tested by the second input wire clamp 2;
2. the polarity display module is respectively connected with two ends of the secondary side of the current transformer to be tested;
3. The tester presses the manual testing button 4 to send a testing signal to the control module, the control module controls the normally open contact of the relay to complete one-time actuation, and the control module sends a working command to the current generating unit through the wireless sending module;
4. The wireless receiving module receives the working command and sends the working command to the power supply control module, and the power supply control module controls the primary sides of the current transformers to be tested to conduct to generate current, so that a complete loop is formed between the current transformers to be tested, the current generating unit and the polarity display unit;
5. and the staff observes the polarity display module to determine the polarity of the current transformer to be tested.
The invention has simple structure, convenient carrying and convenient and flexible use, realizes the communication between the current generating unit and the polarity display unit through the wireless transmitting module and the wireless receiving module, thereby completing the polarity test and avoiding the traditional measurement mode of dragging a longer test line; the invention has convenient installation, no field wiring is needed, and the polarity measurement can be carried out by pressing the manual test button 4, so that the test can be completed by a single person, the matching of other personnel is not needed, and the test flow and personnel are simplified; the invention also measures a plurality of windings at the same time, reduces the testing workload and saves the testing time.
The portable wireless current transformer polarity testing device can be further optimized or/and improved according to actual needs:
as shown in fig. 2 and 4, the polarity display module includes an ammeter 5, a first light emitting diode 6 and a second light emitting diode 7.
When the ammeter 5 is used for displaying the polarity test result, if the pointer of the ammeter 5 deflects leftwards, the polarity of the tested current transformer is positive, and if the pointer of the ammeter 5 deflects rightwards, the polarity of the tested current transformer is positive; when the first light emitting diode 6 and the second light emitting diode 7 are used to display the polarity test result, the first light emitting diode 6 and the second light emitting diode 7 respectively indicate positive and negative polarities.
As shown in fig. 2 and 4, the polarity display unit further includes output terminal groups corresponding to the polarity display modules in number and one-to-one, the output terminal groups are disposed on the first insulating housing 3, the output terminal groups include a first output terminal 8 and a second output terminal 9, two ends of the ammeter 5 are respectively connected with the first output terminal 8 and the second output terminal 9, an anode of the first light emitting diode 6 is connected with the first output terminal 8, a cathode of the first light emitting diode 6 is connected with the second output terminal 9, a cathode of the second light emitting diode 7 is connected with the first output terminal 8, and an anode of the second light emitting diode 7 is connected with the second output terminal 9.
The output terminal groups are arranged on the first insulating shell 3, the number of the output terminal groups is the same as that of the polarity display modules and corresponds to that of the polarity display modules one by one, and the output terminal groups are convenient to connect with the secondary side of the current transformer to be tested in use.
As shown in fig. 2 and 4, the polarity display unit further includes a second power control switch 16, an automatic test button 10, an automatic stop button 11 and a reset button 12, where the second power control switch 16, the automatic test button 10, the automatic stop button 11 and the reset button 12 are arranged on the first insulating housing 3, and the automatic test button 10, the automatic stop button 11 and the reset button 12 are all connected with the control module, and the second power control switch 16 is connected with the second power supply.
After the tester presses the automatic test button 10, an automatic test signal is sent to the control module, the control module controls the normally open contact interval of the relay to complete actuation according to a preset automatic test time interval, pulse current is sent to the control module at intervals, and the control module sends a working command to the current generation unit at intervals according to the pulse current through the wireless sending module, so that multiple measurements are realized. The reset button 12 is used to reset the control module. The first insulating housing 3 may further be provided with a second power indicator 17.
As shown in fig. 1 and 3, the current generating unit further includes a second insulating housing 13, where the wireless receiving module, the power control module and the second power supply are all located inside the second insulating housing 13, and the first input wire clip 1 and the second input wire clip 2 are both located outside the second insulating housing 13.
As shown in fig. 1 and 3, the current generating unit further includes a first power control switch 14 for controlling the first power and a power supply monitoring indicator lamp 15 capable of starting to supply power to the first power, where the first power and the power supply monitoring indicator lamp 15 are disposed on the second insulating housing 13, and the first input wire clip 1, the first power control switch 14, the first power, the power control module, the power supply monitoring indicator lamp 15, and the second input wire clip 2 are sequentially connected in series.
The technical characteristics form the optimal embodiment of the invention, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (4)
1. The portable wireless current transformer polarity testing device is characterized by comprising a current generating unit and a polarity display unit; the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp, a second input wire clamp and a first power supply, wherein the first input wire clamp, the first power supply, the power supply control module and the second input wire clamp are sequentially connected in series, the first power supply is connected with the wireless receiving module, and the wireless receiving module is connected with the power supply control module; the polarity display unit comprises a first insulating shell, an ammeter, a first light-emitting diode, a second light-emitting diode and an output terminal group, wherein the number of the output terminal group is the same as that of the polarity display modules and corresponds to one by one, a manual test button and at least one polarity display module are arranged on the first insulating shell, a control module, a relay, a second power supply and a wireless transmission module are arranged in the first insulating shell, the second power supply is respectively connected with a normally open contact of the control module and the relay, the control module is respectively connected with a relay coil, the normally open contact of the relay, the wireless transmission module and the manual test button, the output terminal group comprises a first output terminal and a second output terminal, two ends of the ammeter are respectively connected with the first output terminal and the second output terminal, the anode of the first light-emitting diode is connected with the first output terminal, the cathode of the first light-emitting diode is connected with the second output terminal, and the cathode of the second light-emitting diode is connected with the first output terminal;
The testing method of the device comprises the following steps:
Clamping a first input wire clamp to one end of the primary side of the current transformer to be tested, which is close to the bus side, and clamping a second input wire to the other end of the primary side of the current transformer to be tested;
the polarity display module is respectively connected with two ends of the secondary side of the current transformer to be tested through the output terminal group;
the tester presses a manual test button and sends a test signal to the control module once, the control module controls the normally open contact of the relay to complete one-time actuation, and the control module sends a working command to the current generation unit through the wireless sending module;
The wireless receiving module receives the working command and sends the working command to the power supply control module, and the power supply control module controls the primary sides of the current transformers to be tested to conduct to generate current, so that a complete loop is formed between the current transformers to be tested, the current generating unit and the polarity display unit;
The observing polarity display module determines the polarity of the tested current transformer, and specifically comprises the following steps: if the ammeter pointer deflects leftwards, the polarity of the tested current transformer is negative, and if the ammeter pointer deflects rightwards, the polarity of the tested current transformer is positive, and the first light emitting diode and the second light emitting diode are used for respectively indicating the positive polarity and the negative polarity.
2. The portable wireless current transformer polarity test device of claim 1, wherein the polarity display unit further comprises a second power control switch, an automatic test button, an automatic stop button, and a reset button, the second power control switch, the automatic test button, the automatic stop button, and the reset button are disposed on the first insulating housing, the automatic test button, the automatic stop button, and the reset button are all connected with the control module, and the second power control switch is connected with the second power supply.
3. The portable wireless current transformer polarity test device of claim 1 or 2, wherein the current generating unit further comprises a second insulated housing, wherein the wireless receiving module, the power control module and the first power source are all located inside the second insulated housing, and wherein the first input wire clip and the second input wire clip are both located outside the second insulated housing.
4. The portable wireless current transformer polarity test device of claim 3, wherein the current generating unit further comprises a first power control switch for controlling the first power source and a power supply monitoring indicator lamp capable of starting power supply from the first power source, the first power source and the power supply monitoring indicator lamp are arranged on the second insulating shell, and the first input wire clamp, the first power control switch, the first power source, the power supply control module, the power supply monitoring indicator lamp and the second input wire clamp are sequentially connected in series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911077729.8A CN110596522B (en) | 2019-11-06 | 2019-11-06 | Portable wireless current transformer polarity testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911077729.8A CN110596522B (en) | 2019-11-06 | 2019-11-06 | Portable wireless current transformer polarity testing device |
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| CN110596522A CN110596522A (en) | 2019-12-20 |
| CN110596522B true CN110596522B (en) | 2024-10-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112763965A (en) * | 2020-12-11 | 2021-05-07 | 深圳供电局有限公司 | Comprehensive test device of current transformer |
| CN114280525A (en) * | 2021-11-12 | 2022-04-05 | 国网辽宁省电力有限公司电力科学研究院 | Portable current transformer polarity and transformation ratio integrated tester |
| CN116540168B (en) * | 2023-05-22 | 2024-02-02 | 内蒙古送变电有限责任公司 | High-safety portable polarity testing device for current transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208207122U (en) * | 2018-05-29 | 2018-12-07 | 广州供电局有限公司 | polarity tester |
| CN108957218A (en) * | 2018-08-24 | 2018-12-07 | 山东送变电工程有限公司 | A kind of mutual inductor is wireless polarity test device and method |
| CN211123224U (en) * | 2019-11-06 | 2020-07-28 | 国网新疆电力有限公司阿克苏供电公司 | Portable wireless current transformer polarity testing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2015252764B2 (en) * | 2014-04-30 | 2019-11-28 | The Peak Group Pty Limited | Continuity test system and method |
| CN110389280A (en) * | 2019-08-23 | 2019-10-29 | 广东电网有限责任公司 | A kind of current transformer polarity measurement device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208207122U (en) * | 2018-05-29 | 2018-12-07 | 广州供电局有限公司 | polarity tester |
| CN108957218A (en) * | 2018-08-24 | 2018-12-07 | 山东送变电工程有限公司 | A kind of mutual inductor is wireless polarity test device and method |
| CN211123224U (en) * | 2019-11-06 | 2020-07-28 | 国网新疆电力有限公司阿克苏供电公司 | Portable wireless current transformer polarity testing device |
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