CN204330944U - Instrument for testing polarity of current transformer - Google Patents
Instrument for testing polarity of current transformer Download PDFInfo
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- CN204330944U CN204330944U CN201520024759.3U CN201520024759U CN204330944U CN 204330944 U CN204330944 U CN 204330944U CN 201520024759 U CN201520024759 U CN 201520024759U CN 204330944 U CN204330944 U CN 204330944U
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- current transformer
- polarity
- instrument
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- connection passage
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- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000004804 winding Methods 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 208000032368 Device malfunction Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model relates to electric system device for detecting polarity field, particularly relates to instrument for testing polarity of current transformer.This instrument for testing polarity of current transformer, comprising: shell and the polarity test circuit board be arranged in shell; Polarity test circuit board comprises: controller and DC charging power supply; Shell is provided with for accessing the primary connection passage of a current transformer to be tested winding and the secondary connection passage for accessing secondary winding in current transformer to be tested; Primary connection passage is connected with DC charging power supply in the inside of shell; Secondary connection passage is connected with controller in the inside of shell; Shell is also provided with display screen, and the control pin of display screen is connected with controller.Current transformer tester of the present utility model can carry out the test of current transformer polarity quickly and easily, and directly can be seen the result of test by display screen, meets current transformer polarity testing digitizing demand.
Description
Technical field
The utility model relates to electric system device for detecting polarity field, in particular to instrument for testing polarity of current transformer.
Background technology
Current transformer is the electronic devices and components made according to electromagnetic induction principle, and concrete structure comprises closed iron core and a winding being wrapped on iron core and Secondary Winding, and wherein a winding is used for connecing tested electric current, and Secondary Winding is used for connecing measurement instrument.
Current transformer should carry out polarity test before and after handing-over and overhaul, in case mistake polarity when wiring, causes and causes protective device malfunction and can not correctly measure in relay loop and measurement loop.
In correlation technique, the polarity test method of current transformer mainly adopts dry cell to add surge voltage in a winding side of current transformer, in Secondary Winding side, pointer multimeter is measured, and according to the deflection of pointer multimeter pointer, tests out the polarity of current transformer.
Above-mentioned current transformer polarity testing method in correlation technique, when running into larger instrument for testing polarity of current transformer, the deflection of multimeter pointer is not clearly, and this kind of method of testing in correlation technique does not meet the demand of current transformer digitized measurement.
Utility model content
The purpose of this utility model is to provide instrument for testing polarity of current transformer, to solve the above problems.
Embodiments provides a kind of instrument for testing polarity of current transformer of the present utility model, comprising: shell and the polarity test circuit board be arranged in described shell; Described polarity test circuit board comprises: controller and DC charging power supply; Described shell is provided with for accessing the primary connection passage of a current transformer to be tested winding and the secondary connection passage for accessing described secondary winding in current transformer to be tested; Described primary connection passage is connected with described DC charging power supply in the inside of described shell; Described secondary connection passage is connected with described controller in the inside of described shell; Described shell is also provided with display screen, and the control pin of described display screen is connected with described controller.
Preferably, the quantity of described secondary connection passage is three.
Preferably, wherein two the shared connection jaws in three described secondary connection passages, secondary connection passage described in another takies a connection jaws.
Preferably, described polarity test circuit board also comprises secondary connection channel switching circuit; Described secondary connection channel switching circuit is connected with described controller, or described secondary connection channel switching circuit is connected on the connection line of three described secondary connection passages and described controller.
Preferably, described shell is provided with three described secondary connection passage channel selection button one to one with three respectively, three described channel selection button are connected with described secondary connection channel switching circuit respectively.
Preferably, three described channel selection button are disposed on the below of described display screen side by side.
Preferably, described DC charging power supply comprises: charging circuit and feed circuit; Described feed circuit respectively with described charging circuit and described primary connection expanding channels.
Preferably, described shell is provided with charging inlet; Described charging inlet is connected with described charging circuit.
Preferably, described shell is rectangular-shaped.
Preferably, the length of described shell is 18 ~ 22 centimetres, is highly 13 ~ 15 centimetres.
The instrument for testing polarity of current transformer that the utility model embodiment provides, primary connection passage is connected with a winding side of current transformer to be tested, and one time winding is connected with DC charging power supply; Secondary connection passage is connected with the Secondary Winding side of current transformer to be tested, controller is made to obtain the current potential of Secondary Winding side, the polarity obtaining sensor to be tested is compared by primary side and secondary side current potential, and show on a display screen, current transformer tester of the present utility model can be utilized thus to carry out the test of current transformer polarity quickly and easily, and the result of test directly can be seen by display screen, meet current transformer polarity testing digitizing demand.
For making above-mentioned purpose of the present utility model, feature and advantage become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows the shell mechanism schematic diagram of instrument for testing polarity of current transformer in the utility model;
Fig. 2 shows the structural representation of instrument for testing polarity of current transformer in the utility model.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.The assembly of the utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on embodiment of the present utility model, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
The utility model embodiment provides a kind of instrument for testing polarity of current transformer, as shown in Figures 1 and 2, comprising: shell a and the polarity test circuit board b be arranged in shell a; Polarity test circuit board b comprises: controller b2 and DC charging power supply b1; Shell a is provided with the primary connection passage P for accessing a current transformer to be tested winding and the secondary connection passage S for accessing secondary winding in current transformer to be tested; Primary connection passage P is connected with DC charging power supply b1 in the inside of shell a; Secondary connection passage S is connected with controller b2 in the inside of shell a; Shell a is also provided with display screen a1, and the control pin of display screen a1 is connected with controller b2.
When utilizing instrument for testing polarity of current transformer of the present utility model to carry out the test of mutual inductor polarity, primary connection passage P is connected with a winding side of current transformer to be tested, and a winding is connected with DC charging power supply; Secondary connection passage S is connected with the Secondary Winding side of current transformer to be tested, controller b2 is made to obtain the current potential of Secondary Winding side, the polarity obtaining sensor to be tested is compared by primary side and secondary side current potential, and show on display screen a1, current transformer tester of the present utility model can be utilized thus to carry out the test of current transformer polarity quickly and easily, and the result of test directly can be seen by display screen a1, meet current transformer polarity testing digitizing demand.
In instrument for testing polarity of current transformer of the present utility model, the quantity of secondary connection passage S is three, can carry out polarity test by these three secondary connection passage S to three groups of secondary connection sides simultaneously.
Particularly, wherein two the shared connection jaws in three secondary connection passage S, another secondary connection passage S takies a connection jaws.
As shown in Figure 1, the shell a of instrument for testing polarity of current transformer is provided with three interfaces, is respectively first interface, the second interface and the 3rd interface, in each interface, is provided with four connection terminals.
Connection terminal wherein in first interface is used for and time winding switching of in current transformer to be tested; Connection terminal in second interface and the 3rd interface is used for being connected with the Secondary Winding in current transformer to be tested.
Particularly, primary connection passage P comprises two terminals and is designated as P1 and P2 respectively, user can select any two terminals composition primary connection passage P in first interface four terminals, or, preset appointment two the terminal composition primary connection passage P in first interface four terminals, these two terminals in primary connection passage P are respectively used to be connected with the polar end of a current transformer to be tested winding and non-polar end.
Instrument for testing polarity of current transformer comprises three secondary connection passage S, and each secondary connection passage S all comprises two terminals.
As shown in Figure 1, one of them in three connection path takies any two or specify two terminals in the second connection jaws in four terminals, is designated as 1S1 and 1S2 respectively; Two other connection path takies the 3rd connection jaws, and wherein two terminals in the 3rd connection jaws are designated as 2S1 and 2S2 as a secondary connection passage, and remaining two terminals are designated as 3S1 and 3S2 as a secondary connection passage.
Polarity test circuit board b also comprises secondary connection channel switching circuit b3; Secondary connection channel switching circuit b3 is connected with controller b2, or described secondary connection channel switching circuit b3 is connected on the connection line of three described secondary connection passage S and described controller b2, control between three secondary connection passage S and switching can be realized by secondary connection passage S commutation circuit b3.
As shown in Figure 1, the shell a of instrument for testing polarity of current transformer is provided with three respectively with three secondary connection passage S channel selection button A one to one, three channel selection button are designated as button a3, button a4 and button a5 respectively, and these three buttons are connected with secondary connection channel switching circuit b3 respectively.
As shown in Figure 1, three channel selection button, namely button a3, button a4 and button a5 are disposed on the below of display screen a1 side by side.
In current transformer of the present utility model, DC charging power supply b1 comprises: charging circuit and feed circuit; Feed circuit are connected with charging circuit and primary connection passage P respectively.
As shown in Figure 1, shell a is provided with charging inlet a2; Charging inlet a2 is connected with charging circuit.
As shown in Figure 1, the shell a of instrument for testing polarity of current transformer is rectangular-shaped, and preferably, the length of shell a is 18 ~ 22 centimetres, is highly 13 ~ 15 centimetres.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with the protection domain of claim.
Claims (10)
1. an instrument for testing polarity of current transformer, is characterized in that, comprising: shell and the polarity test circuit board be arranged in described shell;
Described polarity test circuit board comprises: controller and DC charging power supply;
Described shell is provided with for accessing the primary connection passage of a current transformer to be tested winding and the secondary connection passage for accessing described secondary winding in current transformer to be tested;
Described primary connection passage is connected with described DC charging power supply in the inside of described shell;
Described secondary connection passage is connected with described controller in the inside of described shell;
Described shell is also provided with display screen, and the control pin of described display screen is connected with described controller.
2. instrument for testing polarity of current transformer according to claim 1, is characterized in that, the quantity of described secondary connection passage is three.
3. instrument for testing polarity of current transformer according to claim 2, is characterized in that, wherein two the shared connection jaws in three described secondary connection passages, secondary connection passage described in another takies a connection jaws.
4. instrument for testing polarity of current transformer according to claim 3, is characterized in that, described polarity test circuit board also comprises secondary connection channel switching circuit;
Described secondary connection channel switching circuit is connected with described controller, or described secondary connection channel switching circuit is connected on the connection line of three described secondary connection passages and described controller.
5. instrument for testing polarity of current transformer according to claim 4, it is characterized in that, described shell is provided with three described secondary connection passage channel selection button one to one with three respectively, three described channel selection button are connected with described secondary connection channel switching circuit respectively.
6. instrument for testing polarity of current transformer according to claim 5, is characterized in that, three described channel selection button are disposed on the below of described display screen side by side.
7. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described DC charging power supply comprises: charging circuit and feed circuit; Described feed circuit respectively with described charging circuit and described primary connection expanding channels.
8. instrument for testing polarity of current transformer according to claim 2, is characterized in that, described shell is provided with charging inlet; Described charging inlet is connected with described charging circuit.
9. instrument for testing polarity of current transformer according to claim 1, is characterized in that, described shell is rectangular-shaped.
10. instrument for testing polarity of current transformer according to claim 9, is characterized in that, the length of described shell is 18 ~ 22 centimetres, is highly 13 ~ 15 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520024759.3U CN204330944U (en) | 2015-01-14 | 2015-01-14 | Instrument for testing polarity of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520024759.3U CN204330944U (en) | 2015-01-14 | 2015-01-14 | Instrument for testing polarity of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330944U true CN204330944U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520024759.3U Active CN204330944U (en) | 2015-01-14 | 2015-01-14 | Instrument for testing polarity of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204330944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001586A (en) * | 2016-01-18 | 2018-12-14 | 辛兴华 | A kind of current transformer polarity detection method |
-
2015
- 2015-01-14 CN CN201520024759.3U patent/CN204330944U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001586A (en) * | 2016-01-18 | 2018-12-14 | 辛兴华 | A kind of current transformer polarity detection method |
| CN109001586B (en) * | 2016-01-18 | 2020-07-17 | 无锡市埃克威电气有限公司 | Polarity detection method for current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160516 Address after: 536000, No. 27 North Bay East Road, the Guangxi Zhuang Autonomous Region, Beihai (Beihai Power Supply Bureau compound) Patentee after: BEIHAI POWER SUPPLY BUREAU OF GUANGXI POWER GRID CO., LTD. Address before: 536000 Beihai Power Supply Bureau, the Guangxi Zhuang Autonomous Region, Beihai Patentee before: Li Zhendong |