Characteristic testing device for power distribution lightning arrester
Through the power distribution arrester characteristic testing device with integrated control technology and wireless remote control technology, the problem of the inability to detect leakage current in the small threshold range and the inability to sense ambient temperature in the prior art is solved, and high-precision testing and wiring safety testing are achieved.
Patent Information
- Application Number
- CN202420601357.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The existing lightning arrester characteristic testing device cannot detect leakage current within a small threshold range, which can easily lead to poor contact of the MOA valve of the lightning arrester and cannot sense the ambient temperature for correction, resulting in poor accuracy of the test results.
A power distribution arrester characteristic testing device is designed, using integrated control technology and wireless remote control technology, and the measurement link and control link are integrated, combined with DC high-voltage power supply, measurement environment and control link to realize leakage current detection in a small threshold range and corrected through the ambient induced temperature.
The leakage current detection of small threshold ranges such as 1mA and 0.75mA is achieved, which avoids poor contact, improves the accuracy of testing, and supports wiring safety testing, and completes the test test with one click.
Smart Images
Figure CN222618714U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to a distribution arrester characteristic testing device. Background technology:
[0002] Lightning arrester is an electrical device used to protect electrical equipment from high transient overvoltage and limit the follow-on time and often the follow-on amplitude. It is used to protect the insulation of AC power transmission and transformation equipment from lightning overvoltage and operation overvoltage. It is suitable for overvoltage protection of transformers, transmission lines, distribution panels, switch cabinets, power meter boxes, vacuum switches, parallel compensation capacitors, rotating motors and semiconductor devices.
[0003] The arrester is connected between the cable and the earth, usually in parallel with the protected equipment. The arrester can effectively protect communication equipment. Once an abnormal voltage appears, the arrester will be activated to play a protective role. When the communication cable or equipment is running under normal operating voltage, the arrester will not work and it will be regarded as a circuit breaker to the ground. Once a high voltage appears and endangers the insulation of the protected equipment, the arrester will immediately act to guide the high voltage impact current to the earth, thereby limiting the voltage amplitude and protecting the insulation of the communication cable and equipment. When the overvoltage disappears, the arrester quickly returns to its original state, allowing the communication line to work normally.
[0004] In order to verify the performance of the lightning arrester, a lightning arrester characteristic test device is needed to detect the lightning arrester. Since the existing characteristic test device sets the measurement link and the control link independently, it cannot realize leakage current detection within a small threshold range, which may easily cause poor contact of the MOA valve of the lightning arrester. At the same time, it cannot sense the ambient temperature to correct the test results, and the overall test result accuracy is poor. Utility model content:
[0005] The embodiment of the utility model provides a distribution lightning arrester characteristic test device with reasonable structural design. Based on integrated control technology and wireless remote control technology, the measurement link and the control link can be integrated and set, and the DC high-voltage power supply, the measurement environment and the control link are organically combined. The leakage current detection within a small threshold range such as DC 1mA and 0.75mA can be realized to avoid the phenomenon of poor contact. The overall test accuracy is improved by combining the correction of the environmental sensing temperature. At the same time, the wiring safety test can be realized, and the experimental test can be completed with one key, thereby solving the problems existing in the prior art.
[0006] The technical solution adopted by the utility model to solve the above technical problems is:
[0007] A distribution arrester characteristic test device, the characteristic test device comprising:
[0008] A housing is provided with a high-voltage output interface and a grounding terminal for electrically connecting the arrester to be tested; a liquid crystal display is provided on the housing, the liquid crystal display is used to record and display the test results, and a printer is provided on the housing below the liquid crystal display, the printer is used to print the test results of the arrester with one click;
[0009] A controller is provided in the shell, and a temperature sensor is connected to the controller through an AD converter, and the temperature sensor is used to sense and detect environmental temperature parameters; a wireless transceiver is connected to the controller, and the wireless transceiver is used to establish a wireless communication network to realize wireless remote control of the controller; an adjustment knob is connected to the controller through a command input device to set the working mode of the controller, realize parameter setting, control measurement and result printing; the adjustment knob is arranged on the shell.
[0010] A high voltage output indicator light, an under voltage indicator light and a charging indicator light are arranged on the shell.
[0011] The housing is provided with a matching power interface and a power switch.
[0012] The model of the controller is STM32F103C8T6, and 64 pins are arranged on the controller. The controller is connected to the instruction input device through pin No. 4, the controller is connected to the AD converter through pin No. 15, and the controller is connected to the wireless transceiver through pin No. 20 and pin No. 21.
[0013] The model of the command input device is TLP290, and four pins are provided on the command input device. Pin No. 1 of the command input device is connected to the adjustment knob, a ninth resistor, a tenth resistor and a fourth capacitor are connected in parallel between pin No. 1 and pin No. 2 of the command input device, a fifth capacitor and an eighth resistor are connected in parallel between pin No. 3 and pin No. 4 of the command input device, and pin No. 3 of the command input device is connected to pin No. 4 of the controller.
[0014] The model of the AD converter is AD8551. There are 8 pins on the AD converter. The AD converter is connected to the 15th pin of the controller via the 6th pin. The AD converter is connected to the temperature sensor via the 3rd pin.
[0015] The model of the wireless transceiver is ESP8266, and 8 pins are arranged on the wireless transceiver. The wireless transceiver is connected to the pin No. 21 of the controller through the pin No. 4, and the wireless transceiver is connected to the pin No. 20 of the controller through the pin No. 8.
[0016] The utility model adopts the above structure, and electrically connects the lightning arrester to be tested through the matching high-voltage output interface and the grounding terminal to achieve accurate detection; the test results are recorded and displayed on the LCD screen, and the test results of the lightning arrester are printed with one click through the printer; the controller is coordinated with various types of electrical components to achieve parameter setting and control measurement, thereby achieving automatic and efficient detection, and has the advantages of being simple, practical, safe and efficient. Description of the drawings:
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Figure 2 This is the electrical schematic diagram of the controller of the utility model.
[0019] Figure 3 The electrical schematic diagram of the command input device of the utility model.
[0020] Figure 4 This is an electrical schematic diagram of the AD converter of the present utility model.
[0021] Figure 5 This is an electrical schematic diagram of the wireless transceiver of the utility model. Specific implementation method:
[0022] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.
[0023] like Figure 1-5 As shown in, a distribution arrester characteristic test device, the characteristic test device comprises:
[0024] A housing is provided with a high-voltage output interface and a grounding terminal for electrically connecting the arrester to be tested; a liquid crystal display is provided on the housing, the liquid crystal display is used to record and display the test results, and a printer is provided on the housing below the liquid crystal display, the printer is used to print the test results of the arrester with one click;
[0025] A controller is provided in the shell, and a temperature sensor is connected to the controller through an AD converter, and the temperature sensor is used to sense and detect environmental temperature parameters; a wireless transceiver is connected to the controller, and the wireless transceiver is used to establish a wireless communication network to realize wireless remote control of the controller; an adjustment knob is connected to the controller through a command input device to set the working mode of the controller, realize parameter setting, control measurement and result printing; the adjustment knob is arranged on the shell.
[0026] A high voltage output indicator light, an under voltage indicator light and a charging indicator light are arranged on the shell.
[0027] The housing is provided with a matching power interface and a power switch.
[0028] The model of the controller is STM32F103C8T6, and 64 pins are arranged on the controller. The controller is connected to the instruction input device through pin No. 4, the controller is connected to the AD converter through pin No. 15, and the controller is connected to the wireless transceiver through pin No. 20 and pin No. 21.
[0029] The model of the command input device is TLP290, and four pins are provided on the command input device. Pin No. 1 of the command input device is connected to the adjustment knob, a ninth resistor, a tenth resistor and a fourth capacitor are connected in parallel between pin No. 1 and pin No. 2 of the command input device, a fifth capacitor and an eighth resistor are connected in parallel between pin No. 3 and pin No. 4 of the command input device, and pin No. 3 of the command input device is connected to pin No. 4 of the controller.
[0030] The model of the AD converter is AD8551. There are 8 pins on the AD converter. The AD converter is connected to the 15th pin of the controller via the 6th pin. The AD converter is connected to the temperature sensor via the 3rd pin.
[0031] The model of the wireless transceiver is ESP8266, and 8 pins are arranged on the wireless transceiver. The wireless transceiver is connected to the pin No. 21 of the controller through the pin No. 4, and the wireless transceiver is connected to the pin No. 20 of the controller through the pin No. 8.
[0032] The working principle of a distribution lightning arrester characteristic test device in the embodiment of the utility model is: based on integrated control technology and wireless remote control technology, the measurement link and the control link can be integrated and set, and the DC high-voltage power supply, the measurement environment and the control link can be organically combined to realize the detection of leakage current in a small threshold range such as DC 1mA and 0.75mA, avoid the phenomenon of poor contact, and combine the correction of environmental sensing temperature to improve the overall test accuracy. At the same time, the wiring safety test can be realized, and the test test can be completed with one click.
[0033] This application is a new type of compact product specifically used to detect poor contact and internal defects of gapless zinc oxide arresters MOA valves for 6kV, 35KV and 10KV power systems. It can organically combine DC high-voltage power supply, measurement and control systems to achieve leakage current detection in a small threshold range.
[0034] Compared with the test device in the prior art, the present application incorporates the ambient temperature into the test results, which can optimize and correct the test results to ensure the accuracy of the test results; at the same time, the test device of the present application can be combined with wireless remote control to achieve wiring safety testing.
[0035] The core component is a controller, whose model is STM32F103C8T6. The controller is provided with 64 pins. The controller is connected to the instruction input device through pin No. 4, the controller is connected to the AD converter through pin No. 15, and the controller is connected to the wireless transceiver through pin No. 20 and pin No. 21; thus forming an overall hardware circuit, and relying on the above-mentioned overall hardware circuit to realize automatic and accurate testing of the lightning arrester, and at the same time transmit and display the test results.
[0036] Preferably, the model of the command input device is TLP290, and four pins are provided on the command input device. Pin No. 1 of the command input device is connected to the adjusting knob, a ninth resistor, a tenth resistor and a fourth capacitor are connected in parallel between pin No. 1 and pin No. 2 of the command input device, a fifth capacitor and an eighth resistor are connected in parallel between pin No. 3 and pin No. 4 of the command input device, and pin No. 3 of the command input device is connected to pin No. 4 of the controller, and cooperates with the adjusting knob to freely perform parameter setting and control testing.
[0037] Preferably, the model of the AD converter is AD8551, and 8 pins are provided on the AD converter. The AD converter is connected to the pin No. 15 of the controller through the pin No. 6, and the AD converter is connected to the temperature sensor through the pin No. 3. It can accurately sense and detect environmental parameters and convert them into data types recognizable by the controller, which is convenient for the correction and calculation of test data.
[0038] Preferably, the model of the wireless transceiver is ESP8266, and 8 pins are provided on the wireless transceiver. The wireless transceiver is connected to pin 21 of the controller via pin 4, and the wireless transceiver is connected to pin 20 of the controller via pin 8. Wireless network communication can be established between the host computer and the controller, so that the parameters obtained by the test can be transmitted wirelessly, and the controller can also be remotely controlled wirelessly.
[0039] It should be noted that the LCD screen is equipped with a test area, a withstand voltage area, a clock area and a viewing area, which can be set and adjusted during the test to meet the actual application needs; the arrester test will automatically save the test results after completion, and the instrument can store 50 test results. When the test data exceeds 50 times, the first data will be automatically overwritten and the other data will remain unchanged, and will be stored in a cycle.
[0040] To sum up, a distribution lightning arrester characteristic testing device in an embodiment of the utility model is based on integrated control technology and wireless remote control technology, can integrate the measurement link and the control link, and organically combine the DC high-voltage power supply, the measurement environment and the control link. It can realize the detection of leakage current in a small threshold range such as DC 1mA and 0.75mA, avoid the phenomenon of poor contact, and improve the overall test accuracy by combining the correction of the environmental sensing temperature. At the same time, it can realize wiring safety testing and complete the test test with one click.
[0041] The above specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.
[0042] The matters not described in detail in the present invention are all known technologies to those skilled in the art.
Claims
1. A distribution arrester characteristic test device, characterized in that: The characteristic testing device comprises: A housing is provided with a high-voltage output interface and a grounding terminal for electrically connecting the arrester to be tested; a liquid crystal display is provided on the housing, the liquid crystal display is used to record and display the test results, and a printer is provided on the housing below the liquid crystal display, the printer is used to print the test results of the arrester with one click; A controller is provided in the shell, and a temperature sensor is connected to the controller through an AD converter, and the temperature sensor is used to sense and detect environmental temperature parameters; a wireless transceiver is connected to the controller, and the wireless transceiver is used to establish a wireless communication network to realize wireless remote control of the controller; an adjustment knob is connected to the controller through a command input device to set the working mode of the controller, realize parameter setting, control measurement and result printing; the adjustment knob is arranged on the shell.
2. A distribution arrester characteristic test device according to claim 1, characterized in that: A high voltage output indicator light, an under voltage indicator light and a charging indicator light are arranged on the shell.
3. A distribution arrester characteristic test device according to claim 1, characterized in that: The housing is provided with a matching power interface and a power switch.
4. A distribution arrester characteristic test device according to claim 1, characterized in that: The model of the controller is STM32F103C8T6, and 64 pins are arranged on the controller. The controller is connected to the instruction input device through pin No. 4, the controller is connected to the AD converter through pin No. 15, and the controller is connected to the wireless transceiver through pin No. 20 and pin No.
21.
5. A distribution arrester characteristic test device according to claim 4, characterized in that: The model of the command input device is TLP290, and four pins are provided on the command input device. Pin No. 1 of the command input device is connected to the adjustment knob, a ninth resistor, a tenth resistor and a fourth capacitor are connected in parallel between pin No. 1 and pin No. 2 of the command input device, a fifth capacitor and an eighth resistor are connected in parallel between pin No. 3 and pin No. 4 of the command input device, and pin No. 3 of the command input device is connected to pin No. 4 of the controller.
6. A distribution arrester characteristic test device according to claim 4, characterized in that: The model of the AD converter is AD8551. There are 8 pins on the AD converter. The AD converter is connected to the 15th pin of the controller via the 6th pin. The AD converter is connected to the temperature sensor via the 3rd pin.
7. A distribution arrester characteristic test device according to claim 4, characterized in that: The model of the wireless transceiver is ESP8266, and 8 pins are arranged on the wireless transceiver. The wireless transceiver is connected to the pin No. 21 of the controller through the pin No. 4, and the wireless transceiver is connected to the pin No. 20 of the controller through the pin No. 8.