CN113311375B - Quick switching test device for current transformer - Google Patents
Quick switching test device for current transformer Download PDFInfo
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- CN113311375B CN113311375B CN202110488757.XA CN202110488757A CN113311375B CN 113311375 B CN113311375 B CN 113311375B CN 202110488757 A CN202110488757 A CN 202110488757A CN 113311375 B CN113311375 B CN 113311375B
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- 238000001514 detection method Methods 0.000 claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 210000001503 joint Anatomy 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241001417523 Plesiopidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009466 transformation Effects 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a rapid switching test device of a current transformer, which comprises a base, a first detection module and a second detection module, wherein the first detection module and the second detection module are arranged at the upper end of the base, the first detection module and the second detection module respectively comprise a first coil assembly and a second coil assembly, and an iron core is arranged between the first coil assembly and the second coil assembly; the invention is designed aiming at the defects of the prior device, the turns ratio of the coils of the two coil assemblies can be quickly adjusted, thus the mutual inductance current can be amplified or reduced according to the needs, the quick switching of the experiment is satisfied, the coils can be opened, the iron core is taken out, and then the wire to be detected is penetrated, so that the mutual inductance current is generated, the flexibility of the detection is greatly improved, and the practicability is strong.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a rapid switching test device for a current transformer.
Background
The current transformer is an instrument for converting primary side large current into secondary side small current according to an electromagnetic induction principle to measure. The current transformer consists of a closed iron core and windings. Its primary winding turns are very few and are strung in the line of the current to be measured. Therefore, the secondary side winding turns are relatively large, and the secondary side loop is always closed when the current transformer works, so that the impedance of the series coil of the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to a short circuit. The current transformer is used for converting primary side large current into secondary side small current for measurement, and the secondary side cannot be opened.
The current transformer is mainly used for converting large current in an alternating current circuit into small current with a certain proportion (the standard of China is 5A times), so that the current transformer is only used for measurement and relay protection. In the processes of power generation, transformation, power transmission and power distribution, due to the difference of electric equipment, current often ranges from tens of amperes to tens of thousands of amperes, and the circuits can be accompanied by high voltage. In order to be able to monitor and measure the circuits of these lines and to solve the danger caused by high voltages and high currents, current transformers are required. A clamp meter for electricians, which is a device for measuring alternating current.
The current transformer is fixed in structure, the number of turns of coils at two sides of the current transformer is difficult to adjust, and an inner iron core of the current transformer is inconvenient to replace.
Disclosure of Invention
The invention aims to provide a rapid switching test device for a current transformer, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The quick switching test device for the current transformer comprises a base, a first detection module and a second detection module, wherein the first detection module and the second detection module are arranged at the upper end of the base, the first detection module and the second detection module respectively comprise a first coil assembly and a second coil assembly, and an iron core is arranged between the first coil assembly and the second coil assembly;
The first coil assembly is electrically connected with the first display assembly through the switching structure, the second coil assembly is electrically connected with the second display assembly through the switching structure, the second display assembly comprises a second display panel, a display screen for displaying current and coil turn numbers is arranged on the second display panel, a connector for an external circuit is further arranged at the end part of the second display panel, and the current to be detected can be led into the second coil assembly through the external circuit;
The first display assembly comprises a first display panel, and a display screen for displaying current signals and turns is arranged on the first display panel.
As a further scheme of the invention: the first coil assembly and the second coil assembly comprise a fixed coil block which is fixedly connected with the upper end of the base, one side of the upper end of the fixed coil block is rotationally provided with a movable coil block, one side surface of the fixed coil block, which is close to the movable coil block, is respectively provided with a mounting groove, two mounting grooves construct a perforation which is convenient for placing an iron core, a second half coil is embedded in the movable coil block, a first half coil is embedded in the fixed coil block, the second half coil and the first half coil are spliced to form a conductive coil, the splicing end part of the first half coil penetrates out of the upper end surface of the fixed coil block, the splicing end part of the second half coil penetrates out of the lower end surface of the second half coil, and when an insulating layer rotates to be attached above the fixed coil block, the first half coil and the second half coil are just abutted to form a complete coil.
As a further scheme of the invention: the rotating ends of the movable coil block and the fixed coil block are provided with lock catches for locking the positions of the movable coil block and the fixed coil block.
As a further scheme of the invention: the inner wall of the mounting groove is provided with a positioning block for supporting the iron core.
As a further scheme of the invention: and insulating layers are arranged on the surfaces of the fixed coil block and the movable coil block.
As still further aspects of the invention: the switching structure comprises an adjusting chute arranged on the side face of the fixed coil block, the second display plate is partially exposed in the adjusting chute, an electricity receiving slide sheet which is in contact with the outer side of the second display plate is slidably matched in the adjusting chute, a lower conductive block at the lower end of the electricity receiving slide sheet is in sliding contact with a sliding conductive rail arranged at the upper end of the base, the arrangement direction of the sliding conductive rail is parallel to the arrangement direction of the first half coil, one side of the sliding conductive rail is electrically connected with the positive electrode of the first display plate or the second display plate through a positive electrode wire, and the other end of the first half coil is electrically connected with the negative electrode end of the first display plate through a negative electrode wire.
As a further scheme of the invention: the surface of the fixed coil block where the adjusting chute is located is provided with a scale strip.
As still further aspects of the invention: the contact ends of the first half coil and the second half coil are round heads.
Compared with the prior art, the invention has the beneficial effects that: the invention is designed aiming at the defects of the prior device, and can quickly adjust the turns ratio of the coils of the two coil assemblies, so that the mutual inductance current can be amplified or reduced according to the needs, the quick switching of the experiment is satisfied, meanwhile, the coils can be opened, the iron core is taken out, and then the iron core is penetrated into the wire to be detected, thereby generating the mutual inductance current, greatly improving the flexibility of detection and having strong practicability.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of an electrical connection sliding sheet in the present invention.
Fig. 3 is a schematic structural diagram of the second half coil and the first half coil when they are spliced in the present invention.
Wherein: the device comprises a base 11, a movable coil block 12, an iron core 13, an insulating layer 14, a mounting groove 15, a first half coil 16, a negative electrode wire 17, a display screen 18, a first display panel 19, a positive electrode wire 20, a sliding conductive rail 21, a power-receiving sliding sheet 22, an adjusting sliding chute 23, a second half coil 24, a power-receiving head 25, a second display panel 26, a fixed coil block 27 and a lower conductive block 28.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, in an embodiment of the present invention, a fast switching test device for a current transformer includes a base 11, and a first detection module and a second detection module disposed at an upper end of the base, where the first detection module and the second detection module respectively include a first coil assembly and a second coil assembly, and an iron core 13 is disposed between the first coil assembly and the second coil assembly;
The first coil assembly is electrically connected with the first display assembly through a switching structure, the second coil assembly is electrically connected with the second display assembly through a switching structure, the second display assembly comprises a second display plate 26, a display screen for displaying current and coil turn numbers is arranged on the second display plate 26, a connector 25 for an external circuit is further arranged at the end part of the second display plate 26, and the current to be detected can be led into the second coil assembly through the external circuit;
The first display assembly comprises a first display panel 19, wherein a display screen 18 for displaying current signals and turns is arranged on the first display panel 19, so that the turn ratio of the two detection modules can be clearly seen in an experiment, and the turn ratio can be adjusted in real time through a switching structure, so that the requirements of different turn ratios are met;
The first coil assembly and the second coil assembly both comprise a fixed coil block 27 connected and fixed with the upper end of the base 11, one side of the upper end of the fixed coil block 27 is rotatably provided with a movable coil block 12, one side surface, close to the fixed coil block 27 and the movable coil block 12, of each fixed coil block is respectively provided with a mounting groove 15, two mounting grooves 15 form a through hole for placing the iron core 13, a second half coil 24 is embedded in the movable coil block 12, a first half coil 16 is embedded in the fixed coil block 27, the second half coil 24 and the first half coil 16 are spliced to form a conductive coil (shown in fig. 3), the spliced end part of the first half coil 16 penetrates out of the upper end surface of the fixed coil block 27, and the spliced end part of the second half coil 24 penetrates out of the lower end surface of the second half coil 24, and when the insulating layer 14 is rotated to be attached above the fixed coil block 27, the spliced openings of the first half coil 16 and the second half coil 24 are just abutted to form a complete coil, and the detachable mode facilitates the replacement of the iron core 13;
Meanwhile, when a wire needs to be subjected to mutual inductance detection, the movable coil block 12 of the second coil assembly can be turned over, then the wire to be tested is placed in the corresponding mounting groove 15, and a display screen on the second display panel 26 is used for reading induction to obtain a current signal, so that the size of the current to be tested is detected, and the mutual inductance device can be switched to another form;
in order to enable the movable coil block 12 to be tightly matched with the fixed coil block 27, the rotating ends of the movable coil block 12 and the fixed coil block 27 are provided with a lock catch for locking the positions of the movable coil block 12 and the fixed coil block 27, so that the problem of loosening is avoided;
The surfaces of the fixed coil block 27 and the movable coil block 12 are provided with an insulating layer 14;
The switching structure comprises an adjusting chute 23 arranged on the side surface of a fixed coil block 27, a second display plate 26 is partially exposed in the adjusting chute 23, an electricity-receiving slide plate 22 which is in contact with the outer side of the second display plate 26 is slidably matched in the adjusting chute 23, a lower conductive block 28 at the lower end of the electricity-receiving slide plate 22 is in sliding contact with a sliding conductive rail 21 arranged at the upper end of the base 11, the arrangement direction of the sliding conductive rail 21 is parallel to the arrangement direction of a first half coil 16, one side of the sliding conductive rail 21 is electrically connected with the positive electrode of the first display plate 19 or the second display plate 26 through a positive electrode wire 20, the other end of the first half coil 16 is electrically connected with the negative electrode end of the first display plate 19 through a negative electrode wire 17, and in practical use, the electricity-receiving slide plate 22 slides in the adjusting chute 23, so that the first half coil 16 between the electricity-receiving slide plate 22 and the negative electrode wire 17 is an effective coil, and the number of turns of the coil is adjusted through the sliding position of the electricity-receiving slide plate 22.
The working principle of the application is as follows: in actual use, the selected iron core 13 is placed in the two mounting grooves 15, then the movable coil block 12 is closed, then the line to be detected is connected with the electric connector 25, at the moment, the second coil assembly is electrified, magnetomotive force is generated in the iron core 13, and then current is generated in the first coil assembly in a mutual inductance way, the display screen on the first display panel 19 can display the current, and the positions of the electric connecting sliding sheets 22 on the first coil assembly and the second coil assembly are respectively adjusted, so that the coil turn ratio of the two coil assemblies is adjusted, thus the mutual inductance current can be amplified or reduced according to the requirement, the rapid switching of experiments is met, in addition, when the electric connecting test cannot be carried out, only the movable coil block 12 and the fixed coil block 27 in the second coil assembly are required to be opened, then the changed electric power is placed in the mounting grooves 15, the movable coil block 12 is closed again, and the current is induced in the coils, and is displayed on the display screen of the second display panel 26.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
Claims (6)
1. The rapid switching test device for the current transformer is characterized by comprising a base (11), a first detection module and a second detection module, wherein the first detection module and the second detection module are arranged at the upper end of the base, the first detection module and the second detection module respectively comprise a first coil assembly and a second coil assembly, and an iron core (13) is arranged between the first coil assembly and the second coil assembly;
The first coil assembly is electrically connected with the first display assembly through a switching structure, the second coil assembly is electrically connected with the second display assembly through the switching structure, the second display assembly comprises a second display plate (26), a display screen used for displaying current and coil turn numbers is arranged on the second display plate (26), a connector (25) used for an external circuit is further arranged at the end part of the second display plate (26), and the current to be detected can be led into the second coil assembly through the external circuit;
The first display assembly comprises a first display panel (19), and a display screen (18) for displaying current signals and turns is arranged on the first display panel (19);
The first coil assembly and the second coil assembly both comprise a fixed coil block (27) fixedly connected with the upper end of the base (11), one side of the upper end of the fixed coil block (27) is rotatably provided with a movable coil block (12), one side surface, close to the fixed coil block (27) and the movable coil block (12), of each fixed coil block is provided with a mounting groove (15), two mounting grooves (15) form a through hole for placing the iron core (13), a second half coil (24) is embedded in the movable coil block (12), a first half coil (16) is embedded in the fixed coil block (27), the second half coil (24) and the first half coil (16) are spliced to form a conductive coil, the splicing end part of the first half coil (16) penetrates out of the upper end surface of the fixed coil block (27), and the splicing end part of the second half coil (24) penetrates out of the lower end surface of the second half coil (24), and when the insulating layer (14) rotates to be attached above the fixed coil block (27), the first half coil (16) and the second half coil (24) are spliced to form a complete butt joint;
The switching structure comprises an adjusting chute (23) arranged on the side face of a fixed coil block (27), a second display plate (26) is partially exposed in the adjusting chute (23), an electric connection sliding sheet (22) in contact with the outer side of the second display plate (26) is slidably matched in the adjusting chute (23), a lower conductive block (28) at the lower end of the electric connection sliding sheet (22) is in sliding contact with a sliding conductive rail (21) arranged at the upper end of a base (11), the arrangement direction of the sliding conductive rail (21) is parallel to the arrangement direction of a first half coil (16), one side of the sliding conductive rail (21) is electrically connected with the positive electrode of the first display plate (19) or the second display plate (26) through a positive electrode wire (20), and the other end of the first half coil (16) is electrically connected with the negative electrode end of the first display plate (19) through a negative electrode wire (17).
2. The current transformer rapid switching test device according to claim 1, wherein the rotating ends of the movable coil block (12) and the fixed coil block (27) are provided with a lock catch for locking the positions of the two.
3. The rapid switching testing device of a current transformer according to claim 1, wherein a positioning block for supporting an iron core is arranged on the inner wall of the mounting groove (15).
4. The current transformer rapid switching test device according to claim 1, wherein the surfaces of the fixed coil block (27) and the movable coil block (12) are provided with an insulating layer (14).
5. The rapid switching test device for the current transformer according to claim 1, wherein the surface of the fixed coil block (27) where the adjusting chute (23) is located is provided with scale bars.
6. The current transformer rapid switching test device of claim 1, wherein the contact ends of the first half coil (16) and the second half coil (24) are rounded heads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110488757.XA CN113311375B (en) | 2021-05-06 | 2021-05-06 | Quick switching test device for current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110488757.XA CN113311375B (en) | 2021-05-06 | 2021-05-06 | Quick switching test device for current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113311375A CN113311375A (en) | 2021-08-27 |
| CN113311375B true CN113311375B (en) | 2024-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110488757.XA Active CN113311375B (en) | 2021-05-06 | 2021-05-06 | Quick switching test device for current transformer |
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| CN (1) | CN113311375B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533001A (en) * | 1939-10-02 | 1941-02-04 | English Electric Co Ltd | A testing device for coils of electro-magnets |
| US4490671A (en) * | 1983-01-17 | 1984-12-25 | Morong Iii William H | Apparatus and method for determining the number of turns on a sample coil |
| KR20140020088A (en) * | 2012-08-08 | 2014-02-18 | 주식회사 더블유티엠 | Current transformer having module for desorption and adherence |
| CN204480878U (en) * | 2015-02-06 | 2015-07-15 | 四川蓝讯宝迩电子科技有限公司 | The current transformer that a kind of no-load voltage ratio is adjustable |
| CN204720062U (en) * | 2015-05-22 | 2015-10-21 | 刘赓 | A kind of electromagnet experiment instrument |
| CN206282715U (en) * | 2016-12-17 | 2017-06-27 | 石家庄西屋电气设备有限公司 | A kind of novel current transformer |
| CN209388863U (en) * | 2019-02-16 | 2019-09-13 | 马文清 | A kind of high-voltage current measurement Current Transformer |
| KR102191783B1 (en) * | 2020-07-15 | 2020-12-16 | 송상훈 | Portable Current Transformer Ratio Tester |
-
2021
- 2021-05-06 CN CN202110488757.XA patent/CN113311375B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533001A (en) * | 1939-10-02 | 1941-02-04 | English Electric Co Ltd | A testing device for coils of electro-magnets |
| US4490671A (en) * | 1983-01-17 | 1984-12-25 | Morong Iii William H | Apparatus and method for determining the number of turns on a sample coil |
| KR20140020088A (en) * | 2012-08-08 | 2014-02-18 | 주식회사 더블유티엠 | Current transformer having module for desorption and adherence |
| CN204480878U (en) * | 2015-02-06 | 2015-07-15 | 四川蓝讯宝迩电子科技有限公司 | The current transformer that a kind of no-load voltage ratio is adjustable |
| CN204720062U (en) * | 2015-05-22 | 2015-10-21 | 刘赓 | A kind of electromagnet experiment instrument |
| CN206282715U (en) * | 2016-12-17 | 2017-06-27 | 石家庄西屋电气设备有限公司 | A kind of novel current transformer |
| CN209388863U (en) * | 2019-02-16 | 2019-09-13 | 马文清 | A kind of high-voltage current measurement Current Transformer |
| KR102191783B1 (en) * | 2020-07-15 | 2020-12-16 | 송상훈 | Portable Current Transformer Ratio Tester |
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| Publication number | Publication date |
|---|---|
| CN113311375A (en) | 2021-08-27 |
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