CN210982582U - Portable tester suitable for testing secondary circuit of photocurrent transformer - Google Patents
Portable tester suitable for testing secondary circuit of photocurrent transformer Download PDFInfo
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- CN210982582U CN210982582U CN201921509615.1U CN201921509615U CN210982582U CN 210982582 U CN210982582 U CN 210982582U CN 201921509615 U CN201921509615 U CN 201921509615U CN 210982582 U CN210982582 U CN 210982582U
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- photocurrent
- photocurrent transformer
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a portable tester suitable for photocurrent transformer secondary circuit test, including tester body, measuring stick and binding clip, the both ends of measuring stick are connected with the output interface and the binding clip of tester body respectively, the tester body includes the shell, is used for the mainboard of photocurrent transformer secondary circuit test and is used for the radiating fin of mainboard, the fin is laminated in the face that generates heat of mainboard, the louvre has been seted up to the shell. The utility model discloses a portable tester has solved current transformer and has once inconvenient wiring of tester and carry out the measuring problem when side mounted position is higher, simultaneously the utility model discloses a portable tester adopts the fin to dispel the heat, has reduced the volume, has alleviateed weight.
Description
Technical Field
The utility model relates to a mutual-inductor secondary circuit test equipment especially relates to a portable tester suitable for photocurrent mutual-inductor secondary circuit test.
Background
The photoelectric current transformer has small occupied area, good insulating property and small electromagnetic interference of optical elements, the method is widely applied to an extra-high voltage converter station and an intelligent substation, the photocurrent transformer adopts a transmission protocol of polarized light, cannot sample the rising current of the secondary side of the current transformer to verify a current loop, only adopts the traditional primary rising current mode, most relay protection testers are adopted for testing the secondary loop of the current photocurrent transformer, and the existing relay protection testers adopt fans for heat dissipation, so the method is very heavy, meanwhile, the primary side of the current transformer is usually installed at a higher position, an operator needs to carry a relay protection tester or a cable to ascend for wiring, meanwhile, an external power panel is required during testing, the workload of operators is further increased, and inconvenience is brought to one-time current rising work of the conventional photocurrent transformer due to the situation.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in: to the technical problem that prior art exists, the utility model provides a be convenient for once incline to carry out the wiring to the current transformer of eminence, the portable tester that is applicable to photocurrent transformer secondary circuit test that the volume is less and weight is lighter.
In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides a portable tester suitable for photocurrent transformer secondary circuit test, includes tester body and measuring stick, the tip of measuring stick is equipped with the binding clip, the root of measuring stick and the output interface connection of tester body, the tester body includes the shell, is used for the mainboard of photocurrent transformer secondary circuit test and is used for the radiating fin to the mainboard, the fin laminates in the face that generates heat of mainboard, the louvre has been seted up to the shell.
Preferably, the measuring rod comprises an inner rod and a sleeve, and the inner rod is arranged in the sleeve in a sliding mode.
Preferably, the measuring rod is an insulating rod.
Preferably, the radiating fins are metal radiating fins or ceramic radiating fins, and insulating heat conducting fins are arranged between the metal radiating fins or the ceramic radiating fins and the mainboard.
Preferably, the mainboard is provided with an input module, a processor module and a signal generation module, the input module comprises a display screen and a keyboard, the keyboard is connected with the input end of the processor module, and the output end of the processor module is connected with the display screen and the signal generation module.
Preferably, the input module further includes a USB interface and an ethernet interface, and the USB interface and the ethernet interface are respectively connected to the input end of the processor module.
Preferably, the signal generating module includes a digital-to-analog converter unit and a power amplifier unit, and the output end of the processor module is sequentially connected to the digital-to-analog converter unit and the power amplifier unit.
Preferably, the tester body further comprises a rechargeable battery module, and the battery module is connected with the power supply end of the main board.
Preferably, the battery module includes a lithium battery.
Compared with the prior art, the utility model has the advantages of:
1. the utility model discloses a tester body and binding clip are connected to the measuring stick, and operating personnel accessible measuring stick will connect the line clamp and send to eminence and current transformer and once incline to be connected, avoid operating personnel to carry tester or cable to the eminence and carry out the line operation, have reduced operating personnel's work burden, have improved operating personnel's work efficiency.
2. The utility model discloses a tester body adopts the fin to dispel the heat to the mainboard, compares and has reduced the volume in current adoption fan radiating tester, has alleviateed weight, and the operating personnel of being convenient for carries.
3. The utility model discloses a measuring stick adopts the telescopic insulator spindle, is convenient for transfer the height according to actual conditions, has also avoided the injury of response to operating personnel in the operation process.
Drawings
Fig. 1 is a schematic diagram of performing a secondary loop test of a photocurrent transformer according to this embodiment.
Fig. 2 is a block diagram of the internal structure of the tester body according to this embodiment.
Fig. 3 is a schematic diagram of a connection block of each module on the motherboard according to this embodiment.
Fig. 4 is a front view of the tester body of the present embodiment.
Fig. 5 is a top view of the tester body of this embodiment.
FIG. 6 is a block diagram of the processor module according to this embodiment.
Illustration of the drawings: 1. a tester body; 11. a housing; 12. a main board; 13. a heat sink; 14. a battery module; 101. a display screen; 102. a keyboard; 103. a USB interface; 104. an Ethernet interface; 105. a digital-to-analog converter unit; 106. a power amplifier unit; 121. an input module; 122. a processor module; 123. a signal generation module; 2. a measuring rod; 3. a jointing clamp.
Detailed Description
The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.
As shown in fig. 1 and 2, the utility model discloses a portable tester suitable for test of photocurrent transformer secondary circuit includes tester body 1 and measuring stick 2, and the tip of measuring stick 2 is equipped with binding clip 3, and the root of measuring stick 2 and tester body 1's output interface are connected, and tester body 1 includes shell 11, be used for the mainboard 12 of photocurrent transformer secondary circuit test and be used for the radiating fin 13 of mainboard 12, and fin 13 laminates in the face that generates heat of mainboard 12, and the louvre has been seted up to shell 11. This embodiment adopts measuring stick 2 to connect tester body 1 and binding clip 3, and operating personnel accessible measuring stick 2 delivers to eminence and current transformer and once inclines to be connected binding clip 3, avoids operating personnel to carry tester or cable to the eminence and carries out the line operation, has reduced operating personnel's work burden, has improved operating personnel's work efficiency. And simultaneously the utility model discloses a tester body 1 adopts fin 13 to dispel the heat to mainboard 12, compares and has reduced the volume in the tester that currently adopts the fan cooling, has alleviateed weight, and the operating personnel of being convenient for carries.
As shown in fig. 1, the measuring rod 2 of the present embodiment is a telescopic insulating rod, which facilitates adjusting the height according to actual conditions, and avoids the damage of induced electricity to the operator during the operation. The measuring rod 2 comprises an inner rod 21 and a sleeve 22, the inner rod 21 being slidably arranged in the sleeve 22.
In this embodiment, in order to prevent the main board 12 from being over-heated due to the fact that the main board 12 and the heat sink 13 are not in close contact with each other, and to avoid the accident caused by the leakage of the portion where the main board 12 and the heat sink 13 are in contact with each other, an insulating heat-conducting fin is disposed between the heat sink 13 and the main board 12 in this embodiment, and the insulating heat-conducting fin in this embodiment is a silica gel heat-conducting fin, and has a good heat-conducting property and can fill a gap between the main board 12 and the heat sink 13, so that. The heat sink 13 in this embodiment may be a metal heat sink or a ceramic heat sink, and in this embodiment, a ceramic heat sink having better heat dissipation performance and being insulated is preferred.
As shown in fig. 3, 5 and 6, the main board 12 of this embodiment is used for testing the secondary circuit of the photocurrent transformer, the main board 12 is provided with an input module 121, a processor module 122 and a signal generation module 123, in order to facilitate real-time parameter input and test result display, the input module 121 of this embodiment includes a display screen 101 and a keyboard 102, the keyboard 102 is connected to an input end of the processor module 122, and an output end of the processor module 122 is connected to the display screen 101 and the signal generation module 123. In order to receive commands from an upper computer or an external input device, the input module 121 of this embodiment further includes a USB interface 103 and an ethernet interface 104, and the USB interface 103 and the ethernet interface 104 are respectively connected to the input end of the processor module 122. The external input device in this embodiment includes a touch panel and a USB mouse, both of which are connected to the tester body 1 through the USB interface 103.
As shown in fig. 3 and 4, the processor module 122 of the present embodiment adopts a master-slave structure of PowerPC + FPGA, and mainly comprises an IBM PowerPC embedded processor, Altera EP4CE55F23C8N and its peripheral expansion circuit. The main processor PowerPC is responsible for communication and human-computer interaction functions, and the auxiliary processor FPGA is responsible for generation and related calculation of digital waveform signals. When the PowerPC receives parameters input by a user through the keyboard 102 or the USB interface 103, or the PowerPC receives a control command input by the upper computer through the ethernet interface 104, parameters related to waveforms such as amplitude, phase, frequency, and the like are transmitted to the FPGA, and after the FPGA receives the waveform setting related parameters, the DAC (digital-to-analog converter) is controlled to generate a required analog signal.
As shown in fig. 3, the signal generating module 123 of the present embodiment includes a digital-to-analog converter unit 105 and a power amplifier unit 106, and the output end of the processor module 122 is connected to the digital-to-analog converter unit 105 and the power amplifier unit 106 in sequence. The output range of the analog waveform signal of the embodiment is 0.1-2A, the precision in the output range is 0.1%, and the single-phase maximum output power is 10 VA/phase. Since the present embodiment only needs to output a low power current, the signal generating module 123 removes a reactance compared with a conventional relay protection tester, thereby greatly reducing the weight and volume of the tester body 1. The digital-to-analog converter unit 105 of this embodiment includes an isolation unit and a DAC for filtering, the DAC receives a command from the processor FPGA to generate an analog signal and outputs the analog signal, the power amplifier unit 106 of this embodiment includes an input stage and an intermediate amplifier stage circuit for filtering, and further includes a power amplifier, and the analog signal output by the digital-to-analog converter is filtered by the input stage and the intermediate amplifier stage circuit of the power amplifier unit 106 and amplified by the power amplifier into an analog current, which is output to the primary side of the photocurrent transformer for loop test.
As shown in fig. 2, the tester body 1 of this embodiment further includes a rechargeable battery module 14, and the power supply terminals of the battery module 14 and the main board 12 are connected to be used as a power supply for the main board 12 to perform a secondary circuit test of the photocurrent transformer, so as to avoid that an operator needs to carry a power supply panel as a power supply during the test, thereby further reducing the burden of the operator. The battery module 14 of the present embodiment includes a lithium battery, which has a small size and a high endurance, and does not affect the portability of the tester body 1 of the present embodiment.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a portable tester suitable for photocurrent transformer secondary circuit test, a serial communication port, including tester body (1) and measuring stick (2), the tip of measuring stick (2) is equipped with binding clip (3), the root of measuring stick (2) and the output interface connection of tester body (1), tester body (1) includes shell (11), is used for photocurrent transformer secondary circuit test mainboard (12) and is used for radiating fin (13) to mainboard (12), fin (13) laminate in the face that generates heat of mainboard (12), the louvre has been seted up in shell (11).
2. The portable tester for testing the secondary loop of the photocurrent transformer of claim 1, wherein the measurement rod (2) comprises an inner rod (21) and a sleeve (22), the inner rod (21) being slidably disposed in the sleeve (22).
3. The portable tester for testing the secondary loop of the photocurrent transformer of claim 1, wherein the measuring rod (2) is an insulating rod.
4. The portable tester for testing the secondary circuit of the photocurrent transformer as recited in claim 1, wherein the heat sink (13) is a metal heat sink or a ceramic heat sink, and an insulating heat conducting fin is disposed between the metal heat sink or the ceramic heat sink and the motherboard (12).
5. The portable tester suitable for testing the secondary loop of the photocurrent transformer of claim 1, wherein the main board (12) is provided with an input module (121), a processor module (122) and a signal generation module (123), the input module (121) comprises a display screen (101) and a keyboard (102), the keyboard (102) is connected with the input end of the processor module (122), and the output end of the processor module (122) is connected with the display screen (101) and the signal generation module (123).
6. The portable tester for testing the secondary loop of the photocurrent transformer of claim 5, wherein the input module (121) further comprises a USB interface (103) and an ethernet interface (104), and the USB interface (103) and the ethernet interface (104) are respectively connected to the input end of the processor module (122).
7. The portable tester for testing the secondary loop of the photocurrent transformer of claim 5, wherein the signal generating module (123) comprises a digital-to-analog converter unit (105) and a power amplifier unit (106), and the output terminal of the processor module (122) is connected with the digital-to-analog converter unit (105) and the power amplifier unit (106) in sequence.
8. The portable tester for testing the secondary loop of the photocurrent transformer of claim 1, wherein the tester body (1) further comprises a rechargeable battery module (14), and the battery module (14) is connected with the power supply end of the main board (12).
9. The portable tester for testing the secondary loop of the photocurrent transformer of claim 8, wherein the battery module (14) comprises a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921509615.1U CN210982582U (en) | 2019-09-11 | 2019-09-11 | Portable tester suitable for testing secondary circuit of photocurrent transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921509615.1U CN210982582U (en) | 2019-09-11 | 2019-09-11 | Portable tester suitable for testing secondary circuit of photocurrent transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210982582U true CN210982582U (en) | 2020-07-10 |
Family
ID=71419890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921509615.1U Active CN210982582U (en) | 2019-09-11 | 2019-09-11 | Portable tester suitable for testing secondary circuit of photocurrent transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210982582U (en) |
-
2019
- 2019-09-11 CN CN201921509615.1U patent/CN210982582U/en active Active
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