CN-224231957-U - Direct current test-feeding instrument with self-checking function

CN224231957UCN 224231957 UCN224231957 UCN 224231957UCN-224231957-U

Abstract

The utility model belongs to the field of power test equipment, and particularly discloses a direct current test feeder with a self-checking function, which comprises a box body, wherein a power module, a high-voltage generation module, a measurement module and a singlechip are arranged in the box body, a fixing seat and a checking module are arranged on the box body, the checking module comprises a standard resistance module, the standard resistance module is detachably connected to the fixing seat, the power module, the high-voltage generation module and the fixing seat are sequentially connected, the standard resistance module is connected with the output end of the high-voltage generation module, and the high-voltage generation module and the measurement module are respectively connected with the singlechip. The utility model takes the standard resistance module as the output load of the high-voltage generation module, collects the current of the standard resistance module through the measurement module, calculates the actual output voltage of the high-voltage generation module according to the resistance, and realizes the verification of the voltage output function before the test of the direct-current test feeder.

Inventors

HUANG LIANGYING
WANG YICHENG
DUAN YUJIE
Yang sanquan
LUO ZHENXIAN

Assignees

广西电友科技发展有限公司

Dates

Publication Date: 20260512
Application Date: 20250515

Claims (7)

1. The utility model provides a direct current test send appearance with self-checking function which characterized in that includes: the box body is provided with a high-voltage output terminal, a grounding terminal and a fixing seat; The system comprises a power supply module, a high-voltage generation module, a measurement module and a singlechip; The power module, the high-voltage generation module and the measurement module are all arranged in the box body, the power module is connected with the input end of the high-voltage generation module, the output end of the high-voltage generation module is respectively connected with the measurement module, the fixing seat and the high-voltage output terminal, and the singlechip is respectively connected with the high-voltage generation module and the measurement module; The calibration module is arranged on the box body and comprises a standard resistance module and a temperature sensor, wherein the standard resistance module is detachably connected to the fixing base, and the temperature sensor is connected with the singlechip.
2. The direct current test feeder with a self-checking function according to claim 1, further comprising a fault simulation module, wherein the fault simulation module comprises a transparent shell and a sliding push rod, the sliding push rod is slidably arranged in the transparent shell, the sliding push rod comprises a handle and a conductive part, one end of the conductive part is connected with the grounding terminal through a wire, one end of the transparent shell is provided with an electrode, and the electrode is connected with the high-voltage output terminal through a wire.
3. The direct current test feeder with the self-checking function according to claim 1, wherein the high voltage generation module comprises an electronic boosting module, a high-frequency boosting transformer and a voltage doubling rectifying module, the power module, the electronic boosting module, the high-frequency boosting transformer, the voltage doubling rectifying module and the high-voltage output terminal are sequentially connected, the output end of the voltage doubling rectifying module and the input end of the high-frequency boosting transformer are respectively connected with the fixing seat, the measuring module is connected with the high-voltage output terminal, and the electronic boosting module is connected with the single chip microcomputer.
4. The direct current test feeder with the self-checking function according to claim 3, wherein the standard resistor module comprises a first standard resistor, a second standard resistor and a third standard resistor, the first standard resistor and the second standard resistor are respectively connected with the input end of the high-frequency step-up transformer through the fixing base, the third standard resistor is connected with the output end of the voltage doubling rectifying module through the fixing base, and the measuring module is respectively connected with the first standard resistor, the second standard resistor and the third standard resistor through the fixing base.
5. The direct current test feeder with a self-checking function according to claim 3, further comprising an automatic discharging module, wherein an output end of the voltage doubling rectifying module is connected with the automatic discharging module.
6. The direct current test feeder with the self-checking function according to claim 1, further comprising a data storage module, wherein the data storage module comprises a storage and a timer, and the storage and the timer are respectively connected with the singlechip.
7. The direct current test transmitter with the self-checking function according to claim 1, further comprising a display and voice module and a key module, wherein the display and voice module and the key module are respectively connected with the single chip microcomputer.

Description

Direct current test-feeding instrument with self-checking function Technical Field The utility model belongs to the field of power test equipment, and particularly relates to a direct current test feeder with a self-checking function. Background The direct current test feeder is a high-voltage test instrument commonly used for distribution network lines and equipment with the voltage of 10kV and below, has remarkable effect in the aspect of ground fault finding, and overcomes the accident potential caused by traditional line insulation power transmission. The working principle of the direct current test feeder is that a direct current high-voltage signal is input to a line to be tested, then whether the line has a grounding or interphase short circuit fault is judged by detecting the leakage current of the line, and when the line has the grounding or interphase short circuit, the direct current test feeder can trip to stop outputting the direct current high voltage or. Therefore, the accuracy of the voltage output of the direct current tester directly influences the accuracy of the test result. Generally, a tester needs to periodically send a direct current test feeder to check the output voltage, the output current and the control accuracy of the direct current test feeder. However, the direct current test feeder is affected by the use frequency, the use environment, the transportation process and other factors of the direct current test feeder in different periods, the direct current test feeder cannot be normally used due to the advanced aging or faults of elements in the direct current test feeder, the existing direct current test feeder lacks a self-checking function, a tester is difficult to find the fault problem of the direct current test feeder in time only by means of regular test feeding, and when the direct current test feeder is in use, the output direct current voltage cannot reach a set value or the output voltage is unstable, the accuracy of test results is affected, and the tester cannot check the insulation fault hidden trouble of a line according to the output of the test feeder. In view of the above, the present utility model provides a dc test feeder with a self-checking function to solve the above-mentioned technical problems. Disclosure of utility model The utility model aims to provide a direct current test feeder with a self-checking function, which aims to solve the technical problems that in the background technology, the direct current test feeder cannot find out the fault defect of the direct current test feeder in time by adopting a regular feeding detection mode, and when the direct current voltage output by the direct current test feeder is inaccurate or unstable, a tester cannot accurately judge the hidden trouble of the insulation fault of a circuit to be tested according to the direct current test feeder. In order to achieve the above object, the present utility model provides a dc test feeder with a self-checking function, comprising: the box body is provided with a high-voltage output terminal, a grounding terminal and a fixing seat; The system comprises a power supply module, a high-voltage generation module, a measurement module and a singlechip; The power module, the high-voltage generation module and the measurement module are all arranged in the box body, the power module is connected with the input end of the high-voltage generation module, the output end of the high-voltage generation module is respectively connected with the measurement module, the fixing seat and the high-voltage output terminal, and the singlechip is respectively connected with the high-voltage generation module and the measurement module; The calibration module is arranged on the box body and comprises a standard resistance module and a temperature sensor, wherein the standard resistance module is detachably connected to the fixing base, and the temperature sensor is connected with the singlechip. Preferably, in the above technical scheme, the fault simulation module further comprises a fault simulation module, the fault simulation module comprises a transparent shell and a sliding push rod, the sliding push rod is slidably arranged in the transparent shell, the sliding push rod comprises a handle and a conductive part, one end of the conductive part is connected with the grounding terminal through a wire, one end of the transparent shell is provided with an electrode, and the electrode is connected with the high-voltage output terminal through a wire. Preferably, in the above technical solution, the high voltage generating module includes an electronic boosting module, a high frequency boosting transformer and a voltage doubling rectifying module, where the power module, the electronic boosting module, the high frequency boosting transformer, the voltage doubling rectifying module and the high voltage output terminal are sequentially connected, an output end of the voltage doubling rectifying