CN218298499U - Polarity testing device for current transformer - Google Patents
Polarity testing device for current transformer Download PDFInfo
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- CN218298499U CN218298499U CN202222343452.2U CN202222343452U CN218298499U CN 218298499 U CN218298499 U CN 218298499U CN 202222343452 U CN202222343452 U CN 202222343452U CN 218298499 U CN218298499 U CN 218298499U
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Abstract
The utility model relates to a current transformer polarity testing arrangement belongs to power equipment technical field, and the device includes: the device comprises a direct current voltage source, a color light-emitting module and a self-resetting button switch; the positive pole of the direct current voltage source is connected with the first end of the self-reset button switch, the negative pole of the direct current voltage source is used for being connected with the first end of the primary winding of the current transformer, and the second end of the self-reset button switch is used for being connected with the second end of the primary winding of the current transformer; the first end of the colored light-emitting module is used for being connected with the first end of the secondary winding of the current transformer, the second end of the colored light-emitting module is used for being connected with the second end of the secondary winding of the current transformer, and the colored light-emitting module is used for displaying different colors of light when the current transformer has different polarities. The polarity of the current transformer can be distinguished more quickly by workers, the deflection of a millivoltmeter does not need to be observed, the working time is effectively reduced, and the working efficiency is improved.
Description
Technical Field
The disclosure relates to the technical field of power equipment, in particular to a polarity testing device for a current transformer.
Background
In the related art, the polarity test of the current transformer is an important test of the current transformer, and currently, a special instrument related to the polarity test of the current transformer is a comprehensive instrument for a direct resistance test of a transformer polarity transformation ratio volt-ampere characteristic, rather than a special polarity tester of a single-function current transformer.
When carrying out the polarity test, must with instrument such as millivoltmeter hold in the hand pressurize and observe very inconvenient and can produce certain danger, it is not suitable to some special occasions, and it is more time-consuming and laboursome to tear the test wire of once side of receipts in whole test process moreover, has increased work load to the pointer is anti-partially not obvious when observing the deflection of millivoltmeter, also can cause the damage to the meter.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the related art, an object of the present disclosure is to provide a current transformer polarity testing apparatus.
In order to achieve the above object, the present disclosure provides a current transformer polarity testing apparatus, the apparatus including:
the device comprises a direct-current voltage source, a color light-emitting module and a self-resetting button switch;
the positive electrode of the direct current voltage source is connected with the first end of the self-resetting button switch, the negative electrode of the direct current voltage source is used for being connected with the first end of the primary winding of the current transformer, and the second end of the self-resetting button switch is used for being connected with the second end of the primary winding of the current transformer;
the first end of colored light emitting module be used for with the first end of current transformer's secondary winding is connected, colored light emitting module's second end be used for with current transformer's secondary winding's second end is connected, colored light emitting module is used for being in present different colors's light when current transformer different polarity.
Optionally, the color light emitting module includes a first light emitting diode and a second light emitting diode, the first light emitting diode and the second light emitting diode are connected in parallel in an inverse direction, and the first light emitting diode and the second light emitting diode show different colors of light when in operation.
Optionally, the testing device further comprises a testing device housing;
the direct current voltage source, the color light emitting module and the self-resetting button switch are integrated in a testing device shell, and the testing device shell comprises a first terminal, a second terminal, a third terminal and a fourth terminal;
the first terminal is connected with the negative electrode of the direct current voltage source, and the negative electrode of the direct current voltage source is connected with the first end of the primary winding of the current transformer through the first terminal;
the second terminal is connected with a second end of the self-reset button switch, and the second end of the self-reset button switch is connected with a second end of a primary winding of the current transformer through the second terminal;
the third terminal is connected with the first end of the color light-emitting module, and the first end of the color light-emitting module is connected with the first end of the secondary winding of the current transformer through the third terminal;
the fourth terminal is connected with the second end of the color light-emitting module, and the second end of the color light-emitting module is connected with the second end of the secondary winding of the current transformer through the third terminal.
Optionally, a resistor is further connected in series between the third terminal and the first end of the color light emitting module; alternatively, the first and second electrodes may be,
and a resistor is also connected in series between the fourth terminal and the second end of the color light-emitting module.
Optionally, the testing device further includes a bobbin, and the bobbin is disposed outside the testing device housing.
Optionally, the bobbin winder is an electric bobbin winder, and the bobbin winder is connected to the dc voltage source through a hole on the testing device housing;
and a first switch is arranged between the wire winder and the direct-current voltage source, and the wire winder is conducted with the direct-current voltage source under the condition that the first switch is closed.
Optionally, the first terminal, the second terminal, the third terminal, and the fourth terminal are connected to the current transformer through a high temperature resistant silica gel wire.
Optionally, the test device further comprises a double-bias millivoltmeter;
the double-bias millivoltmeter is connected between the third terminal and the first end of the color light-emitting module in series; alternatively, the first and second liquid crystal display panels may be,
the double-bias millivoltmeter is connected between the fourth terminal and the second end of the color light-emitting module in series.
Optionally, the dc voltage source is a chargeable voltage source.
Optionally, the dc voltage source is a 9 volt dc voltage source.
Through the technical scheme, the self-reset button switch connected with the direct-current voltage source in series is arranged on the primary side, so that the on-off of the loop of the primary side can be controlled, a connecting wire between the power supply and the primary side of the current transformer does not need to be disconnected, electric sparks can be effectively isolated, and the detection safety is improved. In addition, still through setting up colored light emitting module at the secondary side to make this colored light emitting module present different colors's light when current transformer unipolar, make the staff can distinguish current transformer's polarity more fast, need not to observe the deflection of millivoltmeter, reduced operating time effectively and improved work efficiency.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic diagram of a current transformer polarity testing arrangement shown in accordance with an exemplary embodiment;
FIG. 2 is another schematic diagram illustrating a current transformer polarity testing apparatus in accordance with an exemplary embodiment;
FIG. 3 is a schematic diagram of a testing device housing shown in accordance with an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
The current transformer is an instrument for measuring by converting a large primary side current into a small secondary side current according to the electromagnetic induction principle. The current transformer is composed of a closed iron core and a winding. The primary side winding of the transformer has few turns and is connected in a circuit of the current to be measured.
In the related art, the polarity test of the current transformer is an important test of the current transformer, and currently, a special instrument related to the polarity test of the current transformer is a comprehensive instrument for the direct resistance test of the polarity transformation ratio volt-ampere characteristic of the current transformer, rather than a special polarity tester of a single-function current transformer.
When carrying out the polarity test, must with instruments such as millivoltmeter pressurize and observe very inconvenient and can produce certain danger in holding in the hand, not be suitable for to some special occasions, it is more time-consuming and laboursome to tear the side test line of receipts in addition in whole test procedure, has increased work load to the pointer is anti-partially not obvious when observing the deflection of millivoltmeter, also can cause the damage to the meter.
In order to solve the problems existing in the related art, the present disclosure provides a current transformer polarity testing apparatus.
Fig. 1 is a schematic diagram illustrating a current transformer polarity testing apparatus according to an exemplary embodiment, the testing apparatus, as shown in fig. 1, comprising:
the device comprises a direct current voltage source 1, a color light-emitting module 2 and a self-resetting button switch 3;
the positive electrode of the direct current voltage source 1 is connected with the first end of the self-resetting button switch 3, the negative electrode of the direct current voltage source 1 is used for being connected with the first end of the primary winding of the current transformer, and the second end of the self-resetting button switch 3 is used for being connected with the second end of the primary winding of the current transformer;
the first end of colored light emitting module 2 be used for with current transformer's secondary winding's first end is connected, colored light emitting module 2 the second end be used for with current transformer's secondary winding's second end is connected, colored light emitting module 2 is used for appearing different colors's light during the different polarity of current transformer.
The self-reset button switch 3 can be a closed self-reset switch, can realize the on-off control of a primary side loop, and can effectively isolate electric sparks. When the self-reset button switch 3 is pressed, the primary side loop is conducted, that is, the current returns to the direct current voltage source 1 after passing through the self-reset button and the primary winding of the current transformer through the positive electrode of the direct current voltage source 1, and when the self-reset button switch 3 is not pressed, the primary side loop is automatically disconnected to disconnect the primary side loop. Alternatively, the self-resetting push button switch 3 may be subjected to a waterproof test before being integrated into the current transformer polarity testing apparatus, and then installed after the waterproof test is passed.
Optionally, the dc voltage source 1 is a chargeable voltage source. In other possible embodiments, the dc voltage source 1 is a 9 volt dc voltage source. Wherein, the 9V DC voltage source can be obtained by connecting a plurality of chargeable voltage sources in series.
It should be noted that the polarity of the current transformer refers to the relationship between the direction of current flow between its primary and secondary windings. The current transformer is divided into a primary winding and a secondary winding, the primary winding comprises a P1 side and a P2 side, and the secondary winding can comprise a plurality of groups of windings, namely 1S1 and 1S2;2S1, 2S2, etc. When the primary winding and the secondary winding of the current transformer input current at the same polarity terminal, the directions of magnetic fluxes generated in the iron core by the primary winding and the secondary winding are the same, and the polarity of the current transformer is marked as minus polarity. Otherwise, the polarity is added. When performing the polarity test, the secondary winding 1S1 may be connected to the first terminal of the color light module 2, the 1S2 may be connected to the second terminal of the color light module 2, and the primary winding P1 may be connected to the second terminal of the battery anode self-reset button switch 3. When the P2 side connects to the negative pole of the dc voltage source 1 instantaneously, the color light emitting module 2 can then be according to, the polarity of the current transformer presents different colored lights, for example, when the current transformer presents the polarity reduction, then the color light emitting module 2 can emit red light, when the current transformer presents the polarity addition, the color light emitting module 2 can emit green light, and then, the relevant staff can judge the polarity of the current transformer according to the color of the light presented by the color light emitting module 2.
In the embodiment of the present disclosure, the self-reset button switch 3 connected in series with the dc voltage source 1 is disposed on the primary side, so that the on-off of the primary side loop can be controlled, the connection line between the power supply and the primary side of the current transformer does not need to be disconnected, electric sparks can be effectively isolated, and the safety of detection is improved. In addition, still through setting up colored light emitting module 2 at the secondary side to make this colored light emitting module 2 present different colors's light when current transformer is not polarity, make the staff can distinguish current transformer's polarity more fast, need not to observe the deflection of millivoltmeter, reduced operating time effectively and improved work efficiency.
Fig. 2 is another schematic diagram illustrating a polarity testing apparatus of a current transformer according to an exemplary embodiment, and referring to fig. 2, in some alternative embodiments, the color light emitting module 2 includes a first light emitting diode 21 and a second light emitting diode 22, the first light emitting diode 21 and the second light emitting diode 22 are connected in anti-parallel, and the first light emitting diode 21 and the second light emitting diode 22 exhibit different colors of lights during operation.
This scheme of adoption, through setting up two reverse parallelly connected emitting diode, can be so that when current transformer is different polarity, this colored light emitting module 2 presents different colored light for the staff can distinguish current transformer's polarity more fast, need not to observe the deflection of millivoltmeter, has reduced operating time effectively and has improved work efficiency.
In some optional embodiments, referring to fig. 2, the testing device further comprises a testing device housing 4, wherein the dc voltage source 1, the color light module 2 and the self-resetting push button switch 3 are integrated in the testing device housing 4, fig. 3 is a schematic diagram of a testing device housing according to an exemplary embodiment, referring to fig. 3, the testing device housing 4 comprises a first terminal D1, a second terminal D2, a third terminal D3 and a fourth terminal D4.
Based on the test device housing 4 shown in fig. 3, with reference to fig. 2:
the first terminal D1 is connected to a negative electrode of the dc voltage source 1, and the negative electrode of the dc voltage source 1 is connected to a first end of a primary winding of the current transformer through the first terminal D1;
the second terminal D2 is connected with a second end of the self-reset button switch 3, and the second end of the self-reset button switch 3 is connected with a second end of the primary winding of the current transformer through the second terminal D2;
the third terminal D3 is connected to the first end of the color light-emitting module 2, and the first end of the color light-emitting module 2 is connected to the first end of the secondary winding of the current transformer through the third terminal D3;
the fourth terminal D4 is connected to the second end of the color light emitting module 2, and the second end of the color light emitting module 2 is connected to the second end of the secondary winding of the current transformer through the third terminal D3.
Optionally, the first terminal D1, the second terminal D2, the third terminal D3, and the fourth terminal D4 are connected to the current transformer through a high temperature resistant silica gel wire. Wherein, high temperature resistant silica gel line can be super soft high temperature resistant silica gel line, before being connected to current transformer with each terminal, can also carry out insulation test to this high temperature resistant silica gel line to avoid high-voltage danger.
The size of the testing device shell 4 can be designed to be the size which can be held by a polarity tester with one hand, a terminal on the testing device shell 4 can be a metal wiring hole to be accessed by a plurality of testing wires, the other ends of the testing wires can be respectively connected with the primary winding of the current transformer and the two ends of the secondary winding, so that the first end of the primary winding of the current transformer is connected and conducted with the negative electrode of the direct current voltage source 1, the second end of the primary winding of the current transformer is connected and conducted with the second end of the self-reset button switch 3, the first end of the secondary winding of the current transformer is connected and conducted with the first end of the colored light-emitting module 2, and the second end of the secondary winding of the current transformer is connected and conducted with the second end of the colored light-emitting module 2.
As shown in fig. 3, the button of the self-reset button switch 3 may protrude from the testing device housing 4, and the light emitting unit of the color light emitting module 2 may be disposed outside the testing device housing 4.
In addition, the number of each terminal or the corresponding wiring port can be marked on the testing device shell 4, so that the phenomenon that the testing device is damaged due to wrong wiring of related workers is avoided.
By adopting the scheme, all electronic devices in the testing device are integrated in the testing device shell 4, and are connected with the current transformer through the terminals arranged on the shell, so that related workers can more conveniently use the testing device to test the current transformer, and the testing efficiency is effectively improved.
In some optional embodiments, referring to fig. 2, a resistor 5 is further connected in series between the third terminal D3 and the first terminal of the color light emitting module 2. Alternatively, the resistor 5 may be connected in series between the fourth terminal D4 and the second end of the color light emitting module 2, that is, between the fourth terminal D4 and the second end of the color light emitting module 2, and the resistor 5 may also be connected in series.
That is, a resistor 5 may be disposed in the secondary side loop, and it is understood that when the secondary side loop is turned on, if the current is too large, the light emitting unit in the color light emitting module 2 may be overloaded and damaged. By adopting the scheme, the resistor 5 is arranged in the secondary side loop, so that the problem of device damage caused by overlarge current can be effectively avoided, and the economical efficiency is improved.
In another embodiment, referring to fig. 3, the testing device further comprises a bobbin 7, and the bobbin 7 is disposed outside the testing device housing 4.
The bobbin 7 and the testing device housing 4 may be integrally non-detachable, or the bobbin 7 may be a device connected to the testing device housing 4 by adhesion, or may be connected through a connection hole on the testing device housing 4, and those skilled in the art may select the bobbin according to specific requirements.
By adopting the scheme, the bobbin winder 7 can be used for accommodating the test wiring harness more quickly in the test completion or test process of the current transformer by arranging the bobbin winder outside the test device shell 4, so that the test wiring harness is more convenient to carry, and the test efficiency can be effectively improved.
In some embodiments, the bobbin 7 is an electric bobbin, and the bobbin 7 is connected to the dc voltage source 1 through a hole on the testing device housing 4; a first switch is arranged between the bobbin 7 and the dc voltage source 1, and when the first switch is closed, the bobbin 7 is conducted with the dc voltage source 1.
This scheme of adoption sets up electronic spooler to supply power for this electronic spooler through the DC power supply source among the testing arrangement, not only can further improve the efficiency of accomodating of test pencil, can also realize that DC voltage source 1's function is multiplexing, need not additionally to set up the power, reduced this testing arrangement's cost effectively.
In some embodiments, referring to fig. 2, the test apparatus further comprises a double bias millivolt meter 6;
the double-bias millivoltmeter 6 is connected between the third terminal D3 and the first end of the color light-emitting module 2 in series; alternatively, the double-bias millivoltmeter 6 is connected in series between the fourth terminal D4 and the second end of the color light emitting module 2.
It will be appreciated that figure 2 only shows one possible implementation. In addition, as shown in fig. 3, the meter dial of the double-bias millivolt meter 6 can be arranged outside the testing device shell 4 for observation of related workers.
By adopting the scheme, the double-bias millivoltmeter 6 is arranged in the secondary side loop, the polarity of the current mutual induction device can be judged through the color light-emitting module 2, the size of the induction voltage of the secondary side can be checked more accurately, and the problem that the instrument is damaged by the reverse bias of the conventional millivoltmeter is solved.
The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A current transformer polarity testing apparatus, the apparatus comprising:
the device comprises a direct-current voltage source, a color light-emitting module and a self-resetting button switch;
the positive pole of the direct current voltage source is connected with the first end of the self-reset button switch, the negative pole of the direct current voltage source is used for being connected with the first end of the primary winding of the current transformer, and the second end of the self-reset button switch is used for being connected with the second end of the primary winding of the current transformer;
the first end of colored light emitting module be used for with the first end of current transformer's secondary winding is connected, colored light emitting module's second end be used for with current transformer's secondary winding's second end is connected, colored light emitting module is used for being in present different colors's light when current transformer different polarity.
2. The test device of claim 1, wherein the color light module comprises a first light emitting diode and a second light emitting diode, the first light emitting diode and the second light emitting diode are connected in anti-parallel, and the first light emitting diode and the second light emitting diode can emit light with different colors when in operation.
3. The testing device of claim 1, further comprising a testing device housing;
the direct-current voltage source, the color light-emitting module and the self-resetting button switch are integrated in a testing device shell, and the testing device shell comprises a first terminal, a second terminal, a third terminal and a fourth terminal;
the first terminal is connected with the negative electrode of the direct current voltage source, and the negative electrode of the direct current voltage source is connected with the first end of the primary winding of the current transformer through the first terminal;
the second terminal is connected with a second end of the self-reset button switch, and the second end of the self-reset button switch is connected with a second end of the primary winding of the current transformer through the second terminal;
the third terminal is connected with the first end of the color light-emitting module, and the first end of the color light-emitting module is connected with the first end of the secondary winding of the current transformer through the third terminal;
the fourth terminal is connected with the second end of the color light-emitting module, and the second end of the color light-emitting module is connected with the second end of the secondary winding of the current transformer through the third terminal.
4. The testing device of claim 3, wherein a resistor is further connected in series between the third terminal and the first end of the color light emitting module; alternatively, the first and second liquid crystal display panels may be,
and a resistor is also connected in series between the fourth terminal and the second end of the color light-emitting module.
5. The testing device of claim 3, further comprising a bobbin disposed outside the testing device housing.
6. The testing device of claim 5, wherein the winder is an electric winder, and the winder is connected to the DC voltage source through a hole on the testing device housing;
a first switch is arranged between the bobbin and the direct-current voltage source, and the bobbin is conducted with the direct-current voltage source under the condition that the first switch is closed.
7. The testing device of claim 3, wherein the first terminal, the second terminal, the third terminal, and the fourth terminal are connected to the current transformer by high temperature resistant silicone wires.
8. The test device of claim 3, further comprising a double bias millivoltmeter;
the double-bias millivoltmeter is connected between the third terminal and the first end of the color light-emitting module in series; alternatively, the first and second electrodes may be,
the double-bias millivoltmeter is connected between the fourth terminal and the second end of the color light-emitting module in series.
9. The test device of any one of claims 1-8, wherein the DC voltage source is a rechargeable voltage source.
10. The test device of any one of claims 1-8, wherein the DC voltage source is a 9 volt DC voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222343452.2U CN218298499U (en) | 2022-09-02 | 2022-09-02 | Polarity testing device for current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222343452.2U CN218298499U (en) | 2022-09-02 | 2022-09-02 | Polarity testing device for current transformer |
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| Publication Number | Publication Date |
|---|---|
| CN218298499U true CN218298499U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222343452.2U Active CN218298499U (en) | 2022-09-02 | 2022-09-02 | Polarity testing device for current transformer |
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|---|---|
| CN (1) | CN218298499U (en) |
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2022
- 2022-09-02 CN CN202222343452.2U patent/CN218298499U/en active Active
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