CN215641781U - Integral type power frequency current test device - Google Patents
Integral type power frequency current test device Download PDFInfo
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- CN215641781U CN215641781U CN202121178452.0U CN202121178452U CN215641781U CN 215641781 U CN215641781 U CN 215641781U CN 202121178452 U CN202121178452 U CN 202121178452U CN 215641781 U CN215641781 U CN 215641781U
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Abstract
The utility model relates to an integrated power frequency current test device, which comprises a box body and a circuit board, wherein a contactor, a voltage regulator and a current transformer are arranged on the circuit board, the voltage regulator is connected with the contactor, the current transformer comprises an input end and an output end, the input end is connected with the voltage regulator, the output end is connected with a current transformer to be tested, a primary current measuring unit is connected to the output end, and a secondary current measuring unit is arranged on the circuit board; the utility model has the advantages that: because the circuit board is installed in the box, make whole device volume lighter, conveniently carry, make things convenient for experimenter's field usage greatly, adjust the output of electric current through the converter, consequently realized the electric current output of integral type, in the field test, only need connect electric current line and power cord can be experimental, under the requirement that satisfies the field test standard, the experimental work load of working a telephone switchboard that significantly reduces, reduce the potential safety hazard that the people made a telephone switchboard the mistake and bring, greatly improve test efficiency.
Description
Technical Field
The utility model relates to an integrated power frequency current test device.
Background
The current transformer converts a large current on a primary side into a small current on a secondary side according to an electromagnetic induction principle to measure, core power supply components adopted by power detection equipment such as a current transformer field calibrator, a volt-ampere characteristic tester and the like at present and a current source are of a split structure, and the mode has the following defects of 1, a plurality of required test devices and accessories thereof and difficulty in carrying; 2. the cost is high and the efficiency is low; 3. the test wiring is complex, the wiring error is easily caused, and the wiring efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an integrated power frequency current test device which can simplify the structure of the whole device and is convenient to carry.
In order to solve the technical problems, the utility model is realized by the following technical scheme: the utility model provides an integral type power frequency current test device, includes box and the circuit board of setting in the box, be equipped with the upper cover sealed the circuit board in the box on the box, be equipped with the contactor that links to each other with the 220V commercial power on the circuit board, convert alternating current input into the voltage regulator of adjustable alternating current to and be used for adjusting output current's converter, the voltage regulator links to each other with the contactor, the converter includes input and output, the input links to each other with the voltage regulator, the output links to each other with the measured current transformer, be connected with primary current measurement unit on the output, be equipped with on the circuit board and surveyed the secondary current measurement unit that current transformer links to each other.
Preferably, the converter is provided with an adjusting handle, and the converter is provided with a gear signboard for marking the current gear.
Preferably, an overvoltage protection module is arranged on the circuit board, one end of the overvoltage protection module is connected with the output end, and the other end of the overvoltage protection module is connected with the contactor.
Preferably, a boss for fixing the circuit board is arranged in the box body, and the top end of the circuit board is flush with the top end of the box body.
Preferably, the upper cover is provided with a vertical plate extending downwards, the vertical plate is formed on the upper cover in a cavity for accommodating the box body, and the vertical plate is fixedly connected to the box body through screws.
Preferably, the vertical plate is provided with a connecting hole for a screw to penetrate through, and the box body is provided with a threaded hole for fixing the screw.
Preferably, the connecting hole is formed in the bottom end of the vertical plate.
Preferably, the vertical plate and the upper cover are of an integrated structure, and an arc chamfer is arranged between the vertical plate and the upper cover.
Preferably, the primary current measuring unit and the secondary current measuring unit are both provided with display screens.
Preferably, the upper cover surface and the vertical plate surface are provided with anti-corrosion zinc plating layers.
In conclusion, the utility model has the advantages that: the contactor, the voltage regulator and the converter are integrated in the box body through the circuit board, the circuit board is arranged in the box body, so that the whole device is lighter in size and convenient to carry, and the field use of experimenters is greatly facilitated; the portable operation platform not only ensures the safe operation of experimenters, but also can arrange test sites according to different site conditions, is flexible and reliable, greatly improves the site adaptability, and faces the condition that the experimental calibration task load of the current batch current transformers is heavy, the device greatly improves the site working efficiency, can effectively shorten the power failure test time, ensures the reliability of power supply of users, is suitable for the preventive maintenance test of current transformers and relay protection of 35kV and below, secondly, because a contactor controls the power input of the whole integrated power frequency current test device, a converter controls the current output of the whole integrated power frequency current test device, realizes the independent control of the output and the input, has low requirement on the test environment, more effectively ensures the safety of the experimenters, and finally, the arrangement of a primary current measuring unit and a secondary current measuring unit, the real-time acquisition can be carried out to primary circuit and secondary current, has improved experimental security performance.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the utility model and the accompanying drawings.
Drawings
The utility model will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of an integrated power frequency current test device according to the present invention;
fig. 2 is a schematic structural diagram of the circuit board of the present invention.
Reference numerals:
the device comprises a box body 1, a boss 11, a circuit board 2, a contactor 21, a voltage regulator 22, a current transformer 23, an input 231, an output 232, an adjusting handle 233, a gear signboard 234, an overvoltage protection module 24, an upper cover 3, a vertical plate 31, a cavity 32, screws 33, a connecting hole 34, an arc chamfer 35, a primary current measuring unit 4, a secondary current measuring unit 5, a display screen 6, a current transformer 7 and a mains supply 8220V.
Detailed Description
As shown in fig. 1 and 2, an integral type power frequency current test device, including box 1 and the circuit board 2 of setting in box 1, be equipped with on box 1 with circuit board 2 sealed upper cover 3 in box 1, be equipped with on circuit board 2 with the contactor 21 that 220V commercial power 8 links to each other, with the voltage regulator 22 that alternating current input converts the adjustable alternating current to and be used for adjusting output current's converter 23, voltage regulator 22 links to each other with contactor 21, converter 23 includes input 231 and output 232, input 231 links to each other with voltage regulator 22, output 232 links to each other with measured current transformer 7, be connected with primary current measuring unit 4 on the output 232, be equipped with the secondary current measuring unit 5 that links to each other with measured current transformer 7 on circuit board 2.
The contactor 21, the voltage regulator 22 and the converter 23 are integrated in the box body 1 through the circuit board 2, the circuit board is arranged in the box body, so that the whole device is lighter in size and convenient to carry, and is greatly convenient for field use of experimenters; the portable operation platform not only ensures the safe operation of experimenters, but also can arrange test sites according to different site conditions, is flexible and reliable, greatly improves the site adaptability, and faces the condition that the experimental calibration task load of the current batch current transformers 7 is heavy, the device greatly improves the site working efficiency, can effectively shorten the power failure test time, ensures the reliability of power supply of users, is suitable for the preventive maintenance test of current transformers 7 and relay protection below 35kV, secondly, because the contactor 21 controls the power input of the whole integrated power frequency current test device, the converter 23 controls the current output of the whole integrated power frequency current test device, realizes the independent control of the output and the input, has low requirement on the test environment, more effectively ensures the safety of the experimenters, and finally, the setting of a primary current measuring unit and a secondary current measuring unit, the real-time acquisition can be carried out to primary circuit and secondary current, has improved experimental security performance.
The converter 23 is provided with the adjusting handle 233, the converter 23 is provided with the gear identification plate 234 for identifying the gear of the current, the adjusting handle 233 is provided for facilitating the adjustment of the output current of the converter 23 by a tester, the accuracy of the output current can be ensured by manual adjustment, the setting of the gear identification plate 234 is convenient for the tester to accurately adjust the magnitude of the output current, and the safety performance of the test is ensured, the circuit board 2 is provided with the overvoltage protection module 24, one end of the overvoltage protection module 24 is connected with the output end 232, the other end of the overvoltage protection module 24 is connected with the contactor 21, the overvoltage protection module 24 is provided for rapidly cutting off the contactor 21 and preventing accidents when the primary output loop voltage value exceeds the loop disconnection voltage, thereby improving the safety during the test, the overvoltage protection module 24 in the embodiment is the prior art, detailed explanation is not done in this embodiment, be equipped with the boss 11 of fixed circuit board 2 in the box 1, and the top of circuit board 2 and the top parallel and level of box 1, just can expose circuit board 2 when enabling upper cover 3 to open, make things convenient for experimenter's operation, the area of contact with circuit board 2 can be increased in the setting of boss 11, improves circuit board 2's fixed quality, but boss 11 and box 1 formula structure as an organic whole in this embodiment also can adopt screw thread fixed connection.
The upper cover 3 is provided with a vertical plate 31 extending downwards, the vertical plate 31 is formed on the upper cover 3 in a cavity 32 for accommodating the box body 1, the vertical plate 31 is fixedly connected to the box body 1 through a screw 33, the cavity 32 is formed on the upper cover 3 through the vertical plate 31, so that the electrical components on the circuit board 2 can be completely sealed, the damage to the electrical components after the upper cover 3 is installed is avoided, in addition, the structure of the upper cover 3 can be simplified, the upper cover 3 is convenient to install and detach, the screw 33 is reliably connected, the separation of the upper cover 3 and the box body 1 can be effectively reduced, the vertical plate 31 is provided with a connecting hole 34 for the screw 33 to penetrate, the box body 1 is provided with a threaded hole for fixing the screw 33, the quick installation of the screw 33 can be realized, the fixing quality of the upper cover 3 is ensured, and the length of the cavity 32 is greater than that of the box body in the embodiment.
The connecting holes 34 are arranged at the bottom end of the vertical plate 31, when the vertical plate 31 is disassembled, only one section of the screw 33 needs to be screwed out from the box body 1, when the vertical plate 31 is not extruded by the screw 33, the upper cover 3 can be directly lifted upwards, and the screw 33 is fixed on the box body 1, so that the upper cover 3 can be rapidly disassembled without disassembling the screw 33, the damage of the screw 33 and the loss of the screw 33 are effectively avoided, when the vertical plate 31 is clamped on the screw 33 through the connecting holes 34, the upper cover 3 can be rapidly installed and fixed by screwing the screw 33, the installation efficiency is improved, the vertical plate 31 and the upper cover 3 are of an integral structure, the arc chamfers 35 are arranged between the vertical plate 31 and the upper cover 3, the stress concentration between the vertical plate 31 and the upper cover 3 can be avoided due to the arrangement of the arc chamfers 35, and the scratch of the upper cover 3 to a tester in the installation process can be effectively prevented, improve the security performance when 3 installation of upper cover are dismantled, secondly, set up into integral type structure with upper cover 3 and riser 31, can simplify the installation technology between upper cover 3 and the riser 31, improve the joint strength between upper cover 3 and the riser 31, guarantee the installation quality of upper cover 3.
The primary current measuring unit 4 and the secondary current measuring unit 5 are both provided with the display screen 6, the display screen 6 can display the measured primary current and the measured secondary current to a tester in real time, so that the tester can conveniently obtain a test result, the display screen 6 in the embodiment is the liquid crystal display screen 6, the surface of the upper cover 3 and the surface of the vertical plate 31 are both provided with anti-corrosion zinc coatings, the corrosion of the upper cover 3 and the vertical plate 31 can be effectively prevented, the service lives of the upper cover 3 and the vertical plate 31 are prolonged, the influence of the corrosion of the upper cover 3 on the circuit board 2 is avoided, secondly, the vertical plate 31 ensures the installation quality of the upper cover 3, and the fixing quality of the screw 33 is ensured.
When in use, the adjusting handle 233 of the current transformer 23 is adjusted to zero counterclockwise, then the power cord is connected with the contactor 21, the output end 232 of the current transformer 23 is connected with the primary side of the current transformer 7 to be tested through a current line, then, the contactor 21 is pressed down, and the adjustment handle 233 is rotated clockwise, a desired output current is called up, the characteristic test can be carried out on the tested equipment, the primary current value of the primary side of the mutual inductor 7 is collected by the primary current measuring unit 4, the secondary current value of the secondary output of the mutual inductor 7 is collected by the secondary current measuring unit 5, the transformation ratio of the tested mutual inductor 7 can be calculated according to the primary current value and the secondary current value, the contactor 21 can be pressed down after the test is finished, secondly, when an impact test needs to be carried out, the required current needs to be firstly called, the contactor 21 is pressed down to cut off the power of the equipment, and the contactor 21 is released to carry out the impact test on the equipment to be tested.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (10)
1. The utility model provides an integral type power frequency current test device which characterized in that: including box and the circuit board of setting in the box, be equipped with the upper cover of sealing up the circuit board in the box on the box, be equipped with the contactor that links to each other with the 220V commercial power on the circuit board, convert alternating current input into the voltage regulator of adjustable alternating current to and be used for adjusting output current's converter, the voltage regulator links to each other with the contactor, the converter includes input and output, the input links to each other with the voltage regulator, the output links to each other with the measured current transformer, be connected with primary current measurement unit on the output, still be equipped with on the circuit board with the secondary current measurement unit that is surveyed current transformer and links to each other.
2. The integrated power frequency current test device of claim 1, wherein: the converter is provided with an adjusting handle, and a gear signboard for marking the current gear is arranged on the converter.
3. The integrated power frequency current test device of claim 2, wherein: the circuit board is provided with an overvoltage protection module, one end of the overvoltage protection module is connected with the output end, and the other end of the overvoltage protection module is connected with the contactor.
4. The integrated power frequency current test device of claim 1, wherein: the box is internally provided with a boss for fixing the circuit board, and the top end of the circuit board is flush with the top end of the box.
5. The integrated power frequency current test device of claim 1, wherein: the upper cover is provided with a vertical plate extending downwards, the vertical plate is formed on the upper cover in a cavity for accommodating the box body, and the vertical plate is fixedly connected to the box body through screws.
6. The integrated power frequency current test device of claim 5, wherein: the vertical plate is provided with a connecting hole for a screw to penetrate through, and the box body is provided with a threaded hole for fixing the screw.
7. The integrated power frequency current test device of claim 6, wherein: the connecting holes are formed in the bottom end of the vertical plate.
8. The integrated power frequency current test device according to claim 5 or 6, wherein: the vertical plate and the upper cover are of an integrated structure, and an arc chamfer is arranged between the vertical plate and the upper cover.
9. The integrated power frequency current test device of claim 5, wherein: and the primary current measuring unit and the secondary current measuring unit are both provided with display screens.
10. The integrated power frequency current test device of claim 5, wherein: the upper cover surface and the vertical plate surface are both provided with anti-corrosion zinc coating layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121178452.0U CN215641781U (en) | 2021-05-28 | 2021-05-28 | Integral type power frequency current test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121178452.0U CN215641781U (en) | 2021-05-28 | 2021-05-28 | Integral type power frequency current test device |
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| Publication Number | Publication Date |
|---|---|
| CN215641781U true CN215641781U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121178452.0U Active CN215641781U (en) | 2021-05-28 | 2021-05-28 | Integral type power frequency current test device |
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| CN (1) | CN215641781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447876A (en) * | 2021-05-28 | 2021-09-28 | 浙江八达电子仪表有限公司时通电气分公司 | Device convenient for current transformer test |
-
2021
- 2021-05-28 CN CN202121178452.0U patent/CN215641781U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447876A (en) * | 2021-05-28 | 2021-09-28 | 浙江八达电子仪表有限公司时通电气分公司 | Device convenient for current transformer test |
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