Auxiliary device for direct-current leakage test of two-section zinc oxide arrester

Abstract

The utility model discloses a double-section zinc oxide lightning arrester direct current leakage test auxiliary device, a double-section zinc oxide lightning arrester comprises an upper section lightning arrester and a lower section lightning arrester, and the test auxiliary device comprises a power supply, a direct current high voltage generator, a first ammeter, a clock module and an ultrasonic sensor. The power supply, the direct-current high-voltage generator and the first ammeter are connected in series to form a grounded detection circuit; the direct-current high-voltage generator is used for providing direct-current high-voltage current flowing through the two-section zinc oxide lightning arrester, and the first ampere meter is used for detecting current flowing through the two-section zinc oxide lightning arrester at each moment; the ultrasonic sensor is used for receiving ultrasonic waves generated when the valve plates of the upper section lightning arrester and the lower section lightning arrester are conducted for discharging; the clock module is used for displaying a first moment when the ultrasonic sensor receives the ultrasonic waves, and a user can determine a first instantaneous current measured by the first ampere meter at the first moment as a first effective acquisition current. The effectiveness of data measured by the test auxiliary device is higher.

Description

Technical Field

[0001] The present application relates to the technical field of power distribution equipment, and in particular to a DC leakage test auxiliary device for a double-section zinc oxide lightning arrester. Background Art

[0002] The double-section zinc oxide arrester is an important device used to prevent internal overvoltage. The DC leakage test can check whether its valve plate is aged or damp, and whether its long-term allowable working current meets the requirements of the specification. It can effectively measure the performance of the double-section zinc oxide arrester and is one of the essential items in the arrester test.

[0003] In the current DC leakage test technology, the DC high voltage generator, power supply and ammeter are connected in series with the grounding of the upper arrester of the double-section zinc oxide arrester to measure the voltage value corresponding to the flowing current of 1 mA (i.e., U 1mA ) to check whether the valve plate of the double-section zinc oxide arrester is damp or aged. The DC high-voltage generator, power supply and ammeter should be connected in series with the grounding of the lower section of the double-section zinc oxide arrester. The measured voltage is 0.75U 1mA The leakage current at this time.

[0004] However, in the prior art, the test auxiliary device consists of only a DC high voltage generator, a power supply and an ammeter. When conducting a DC leakage test, it is necessary to manually record the instantaneous current measured by the ammeter at each moment. However, since the current will change during the experiment, there will be invalid data in the recorded instantaneous current, which affects the validity of the measurement results. Therefore, how to ensure the validity of the measurement results has become a technical problem to be solved. Utility Model Content

[0005] In view of this, the utility model provides a double-section zinc oxide arrester DC leakage test auxiliary device to solve the technical problem of low effectiveness of measurement results measured by the existing test auxiliary device.

[0006] The embodiment of the present application provides a double-section zinc oxide arrester DC leakage test auxiliary device, the double-section zinc oxide arrester includes an upper section arrester and a lower section arrester, and the test auxiliary device includes: a power supply, a DC high voltage generator, a first ammeter, a clock module, and an ultrasonic sensor;

[0007] The power supply, the DC high voltage generator and the first ammeter are connected in series to form a grounded detection circuit; the power supply and the DC high voltage generator are used to provide a DC high voltage current flowing through the double-section zinc oxide arrester, and the first ammeter is used to detect the current flowing through the double-section zinc oxide arrester at each moment;

[0008] The ultrasonic sensor is used to receive the ultrasonic waves generated when the valve plates of the upper and lower lightning arresters are turned on and discharged;

[0009] The clock module is used to display the first moment when the ultrasonic sensor receives the ultrasonic wave.

[0010] Optionally, the test auxiliary device further comprises: a collector for recording the current at each moment including the first moment;

[0011] The clock module is arranged on the collector; the collector is respectively connected to the ultrasonic sensor and the first ammeter for communication so as to collect the first instantaneous current at the first moment.

[0012] Optionally, a display module is also provided on the collector to display the current at each moment including the first moment.

[0013] Optionally, the display module is a digital display module.

[0014] Optionally, the collector is a single chip microcomputer; the input unit of the single chip microcomputer is communicatively connected with the output unit of the ultrasonic sensor and the output unit of the ammeter.

[0015] Optionally, the test auxiliary device further includes: a second ammeter;

[0016] The detection circuit is connected between the upper arrester and the lower arrester;

[0017] The second ammeter is connected in series in the grounding circuit at the bottom of the lower lightning arrester, and is used to detect the current flowing through the lower lightning arrester at each moment including the first moment.

[0018] Optionally, the second ammeter is communicatively connected to the collector, and the collector records the current at each moment detected by the second ammeter.

[0019] Optionally, there are at least two ultrasonic sensors.

[0020] Compared with the prior art, this application has the following advantages:

[0021] In the DC leakage test auxiliary device for the double-section zinc oxide arrester provided in the embodiment of the present application, the double-section zinc oxide arrester includes an upper section arrester and a lower section arrester, and the test auxiliary device includes: a power supply, a DC high-voltage generator, a first ammeter, a clock module, and an ultrasonic sensor; the power supply, the DC high-voltage generator, and the first ammeter are connected in series to form a grounded detection circuit; the power supply and the DC high-voltage generator are used to provide a DC high-voltage current flowing through the double-section zinc oxide arrester, and the first ammeter is used to detect the current flowing through the double-section zinc oxide arrester at each moment; the ultrasonic sensor is used to receive the ultrasonic wave formed when the valve plate of the upper section arrester and the lower section arrester is turned on and discharged; the clock module is used to display the first moment when the ultrasonic sensor receives the ultrasonic wave. The user can record the current detected by the ammeter at each moment, and determine the first instantaneous current measured by the first ammeter at the first moment in each moment as the first effective collection current.

[0022] In this double-section zinc oxide arrester DC leakage test auxiliary device, in addition to the power supply, DC high-voltage generator and the first ammeter, a clock module and an ultrasonic sensor are also provided, so that the discharge moment of the double-section zinc oxide arrester during the power-on process, that is, the first moment, is obtained through ultrasound, and then the instantaneous current at the first moment is used as the effective current, which can make the measurement result more effective, the measurement effect better, and the credibility higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a double-section zinc oxide arrester DC leakage test auxiliary device provided in an embodiment of the present application for measuring an upper-section arrester;

[0024] Figure 2 A schematic diagram of a double-section zinc oxide arrester DC leakage test auxiliary device provided in an embodiment of the present application for measuring a lower-section arrester;

[0025] Figure 3 A schematic diagram of a double-section zinc oxide arrester DC leakage test auxiliary device provided with a second ammeter provided in an embodiment of the present application.

[0026] The reference numerals in the drawings are:

[0027] Upper section lightning arrester 11; lower section lightning arrester 12; valve plate 13;

[0028] Power supply 21; DC high voltage generator 22; first ammeter 23; clock module 24; ultrasonic sensor 25; collector 26; display module 28; second ammeter 29. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described clearly and completely below in conjunction with the drawings in the embodiments of the present application. However, the present application can be implemented in many other ways different from the following description. Therefore, based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", "third", etc. in the claims, description and drawings of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. The data used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including", "having" and their variants are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The first embodiment of the present application provides a double-section zinc oxide arrester DC leakage test auxiliary device. The structure and working principle of the double-section zinc oxide arrester DC leakage test auxiliary device of this embodiment are described below using specific embodiments. It should be noted that the embodiments described below are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. The double-section zinc oxide arrester DC leakage test auxiliary device involved in this application is described in detail below.

[0033] The double-section zinc oxide arrester is an important device used to prevent internal overvoltage. The DC leakage test can check whether its valve plate is aged or damp, and whether its long-term allowable working current meets the requirements of the specification. It can effectively measure the performance of the double-section zinc oxide arrester and is one of the essential items in the arrester test.

[0034] In the current DC leakage test technology, the DC high voltage generator, power supply and ammeter are connected in series with the grounding of the upper arrester of the double-section zinc oxide arrester to measure the voltage value corresponding to the flowing current of 1 mA (i.e., U 1mA) to check whether the valve plate of the double-section zinc oxide arrester is damp or aged. The DC high-voltage generator, power supply and ammeter should be connected in series with the grounding of the lower section of the double-section zinc oxide arrester. The measured voltage is 0.75U 1mA The leakage current at this time.

[0035] However, in the prior art, the test auxiliary device consists of only a DC high voltage generator, a power supply and an ammeter. When conducting a DC leakage test, it is necessary to manually record the instantaneous current measured by the ammeter at each moment. However, since the current will change during the experiment, there will be invalid data in the recorded instantaneous current, which affects the validity of the measurement results. Therefore, how to ensure the validity of the measurement results has become a technical problem to be solved.

[0036] In order to solve the above problems, an embodiment of the present application provides a double-section zinc oxide lightning arrester DC leakage test auxiliary device. In this test auxiliary device, in addition to the power supply, the DC high-voltage generator and the first ammeter, a clock module and an ultrasonic sensor are also provided, so that the discharge moment of the double-section zinc oxide lightning arrester during the power-on process, that is, the first moment, is obtained through ultrasound, and then the instantaneous current at the first moment is used as the effective current, which can make the measurement result more effective, the measurement effect better, and the credibility higher.

[0037] The auxiliary device for DC leakage test of double-section zinc oxide arrester provided in the embodiment of the present application is specifically as follows: Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of a double-section zinc oxide arrester DC leakage test auxiliary device provided in an embodiment of the present application for measuring the upper section arrester, Figure 2 A schematic diagram of a double-section zinc oxide arrester DC leakage test auxiliary device provided in an embodiment of the present application for measuring a lower section arrester. It should be clear that in this embodiment, for the sake of clarity. Figures 1 to 3 In the connection mode between the components in the embodiment, the solid line indicates the electrical connection and the dotted line indicates the communication connection.

[0038] In the double-section zinc oxide arrester DC leakage test auxiliary device, the double-section zinc oxide arrester includes an upper section arrester 11 and a lower section arrester 12. The test auxiliary device includes: a power supply 21, a DC high voltage generator 22, a first ammeter 23, a clock module 24, and an ultrasonic sensor 25;

[0039] The power supply 21, the DC high voltage generator 22 and the first ammeter 23 are connected in series to form a grounded detection circuit; the power supply 21 and the DC high voltage generator 22 are used to provide a DC high voltage current flowing through the double-section zinc oxide arrester, and the first ammeter 23 is used to detect the current flowing through the double-section zinc oxide arrester at each moment;

[0040] The ultrasonic sensor 25 is used to receive the ultrasonic wave generated when the valve plates 13 of the upper lightning arrester 11 and the lower lightning arrester 12 are turned on and discharged;

[0041] The clock module 24 is used to display the first moment when the ultrasonic sensor 25 receives the ultrasonic wave.

[0042] In this embodiment, each component of the DC leakage test auxiliary device for double-section zinc oxide arresters is used to perform a DC leakage test, and each component can be concentrated together or separated from each other. In other words, the DC leakage test auxiliary device for double-section zinc oxide arresters in this embodiment can be set as an integral structure or a structure composed of multiple components used in combination.

[0043] During the implementation, since the current flowing through the test auxiliary device during the DC leakage test is in the milliampere level, the first ammeter 23 is preferably a microampere meter. Of course, other types of ammeters can also be selected without limitation. The power supply 21, the DC high voltage generator 22, the clock module 24, and the ultrasonic sensor 25 should also be adapted and selected according to the different measurement accuracy, without specific limitation.

[0044] The power supply 21, the DC high voltage generator 22 and the first ammeter 23 are connected in series to form a grounded detection circuit, which is a circuit segment for connecting to the double-section zinc oxide lightning arrester to form a grounding loop with the double-section zinc oxide lightning arrester to measure the voltage value corresponding to the flowing current of 1 mA (i.e., U 1mA ), and the measured voltage is 0.75U 1mA The leakage current at this time.

[0045] Specifically, when conducting a DC leakage test, it is necessary to first disconnect the double-section zinc oxide arrester from the high-voltage lead, and then connect the detection circuit formed by the power supply 21, the DC high-voltage generator 22 and the first ammeter 23 in series to the double-section zinc oxide arrester to form a ground loop, and place the ultrasonic sensor 25 at the ultrasonic measurement position. The ultrasonic measurement position needs to be set at a position adjacent to the valve plate 13 of the upper section arrester 11 and the lower section arrester 12, and the distance between the ultrasonic measurement position and the valve plate 13 does not exceed the measurement range of the ultrasonic sensor 25. The ultrasonic sensor 25 is at the ultrasonic measurement position and directly faces the valve plate 13 of the upper section arrester 11 and the lower section arrester 12, so that when the double-section zinc oxide arrester is energized to cause the valve plate 13 to discharge, the corresponding ultrasonic wave is measured.

[0046] The time corresponding to when the ultrasonic sensor 25 receives the ultrasonic wave can be obtained by the clock module 24, that is, the first time is obtained. At this time, the first instantaneous current measured by the first ammeter 23 can be used as the first effective collection current to perform subsequent current abnormality analysis based on the first effective collection current.

[0047] There are many specific implementations for connecting the detection circuit formed by the power supply 21, the DC high voltage generator 22 and the first ammeter 23 in series with the double-section zinc oxide lightning arrester to form a grounding loop.

[0048] A possible implementation method is as follows Figure 1 As shown in the figure, the voltage value corresponding to the flow current of 1 mA (i.e. U 1mA ), the detection circuit composed of the power supply 21, the DC high voltage generator 22 and the first ammeter 23 in series is connected to the head end of the upper lightning arrester 11, and the tail end of the upper lightning arrester 11 and the tail end of the lower lightning arrester 12 are grounded respectively, so as to form a grounding loop. A DC voltage generator is used to apply a DC high voltage to the upper lightning arrester 11, so as to measure the voltage across the upper lightning arrester 11 when the first effective collection current is 1 mA, that is, when the current is 1 mA, the voltage value U1 corresponding to the upper lightning arrester 11 is 上 mA . Then, the voltage across the upper arrester 11 is measured to be 0.75U1 上 mA The first effective current collected by the ammeter is the voltage of 0.75U1 上 mA The leakage current value corresponding to the arrester 11 in the upper section.

[0049] When measuring the lower arrester 12, if Figure 2 As shown, the detection circuit composed of the power supply 21, the DC high voltage generator 22 and the first ammeter 23 connected in series is connected to the head end of the lower lightning arrester 12, and the tail end of the lower lightning arrester 12 is grounded, thereby forming a new grounding loop, and applying a DC high voltage to both ends of the lower lightning arrester 12, so as to measure the voltage across the upper lightning arrester 11 when the first effective collection current is 1 mA, that is, when the current is 1 mA, the voltage value U1 corresponding to the lower lightning arrester 12 下 mA Further, the voltage across the lower arrester 12 is measured to be 0.75U1 下 mA The first effective current collected by the ammeter is the voltage of 0.75U1 下 mA The leakage current value corresponding to the arrester 12 at this time.

[0050] There may be at least two ultrasonic sensors 25, and the two ultrasonic sensors 25 are respectively aimed at the valve plate 13 of the upper arrester 11 and the valve plate 13 of the lower arrester 12 for measurement. Alternatively, the two ultrasonic sensors 25 are set to two or more, and each ultrasonic sensor 25 is arranged in a triangular, rectangular, circular or other manner for comprehensive measurement, which is not specifically limited here.

[0051] In this embodiment, other arrangements may be made based on the structure of the above double-section zinc oxide arrester DC leakage test auxiliary device to further improve the convenience of performing a DC leakage test on the double-section zinc oxide arrester.

[0052] In a feasible implementation, the test auxiliary device also includes: a collector 26 for recording the current at each moment including the first moment; a clock module 24 is arranged on the collector 26; the collector 26 is respectively communicated with the ultrasonic sensor 25 and the first ammeter 23 to collect the first instantaneous current at the first moment.

[0053] In this embodiment, the collector 26 is a structure for collecting various data. Specifically, the collector 26 can be set to a single-chip microcomputer, such as a single-chip microcomputer of any series of STM32. The input unit of the single-chip microcomputer is connected to the output unit of the ultrasonic sensor 25 and the output unit of the ammeter in communication, which can be either wired communication or wireless communication, which is not limited here. The collector 26 can collect and record the current at each moment, including the first moment mentioned above. The user can find the current measured by the first ammeter 23 at the first moment in the current of all moments recorded by the collector, so as to use it as the first effective collection current, so as to facilitate the subsequent analysis of current anomalies.

[0054] The first effective current collector 26 may also be provided with a display module 28 to display the current at each moment including the first moment. The display module 28 is preferably configured as a digital display module to directly display the first moment and the first instantaneous current in digital form, so that the test personnel can view and record them manually.

[0055] Of course, the collector 26 may also be provided with an output module, such as a printing device, to output the recorded data, and more modules may be provided to obtain more functions, which are not limited here.

[0056] Another embodiment is as follows Figure 3 As shown, Figure 3Schematic diagram of a double-section zinc oxide arrester DC leakage test auxiliary device provided with a second ammeter for an embodiment of the present application. Among them, the test auxiliary device also includes: a second ammeter 29; a detection circuit connected between the upper section arrester 11 and the lower section arrester 12; the second ammeter 29 is connected in series in the grounding circuit at the bottom of the lower section arrester 12, and is used to detect the current flowing through the lower section arrester 12 at each moment. Since each moment includes the first moment of discharge mentioned above, the user can obtain the second instantaneous current measured by the second ammeter 29 at the first moment, and determine it as the second effective collection current, so as to perform subsequent current anomaly analysis based on the first effective collection current and the second effective collection current at the same time.

[0057] This implementation method can perform a DC leakage test without disconnecting the double-section zinc oxide arrester from the high-voltage lead. Figure 3 As shown, a detection circuit composed of a power supply 21, a DC high-voltage generator 22 and a first ammeter 23 connected in series is connected between the upper lightning arrester 11 and the lower lightning arrester 12, and the high-voltage lead connected to the upper lightning arrester 11 is grounded, the lower lightning arrester 12 is grounded, and a second ammeter 29 is connected in series in the grounding circuit of the lower lightning arrester 12, thereby forming a grounding loop in which the upper lightning arrester 11 and the lower lightning arrester 12 are connected in parallel.

[0058] The user can use the scheme in the above embodiment for testing. After applying a DC high voltage at the connection between the upper lightning arrester 11 and the lower lightning arrester 12 using a DC voltage generator, at the first moment when the ultrasonic sensor 25 receives the ultrasonic wave, the first ammeter 23 measures the first effective collection current, and the second ammeter 29 measures the second effective collection current. The user can compare the difference between the two effective collection currents at the first moment to obtain the leakage current. If the difference reaches 1mA, the voltage value U1 corresponding to the current flowing through the upper lightning arrester 11 of 1mA can be measured. 上 mA , and then, the voltage across the upper arrester 11 is 0.75U1 上 mA When the first effective current collected by the first ammeter 23 is 1mA, the voltage value U1 corresponding to the current flowing through the lower arrester 12 of 1mA can be measured. 下 mA , and then, the voltage across the lower arrester 12 is 0.75U1 下 mA When the first effective collection current measured by the first ammeter 23 is the leakage current value of the next lightning arrester 12. Such a comparison technique is a commonly used technique in the art, and there are many similar techniques, which will not be described one by one.

[0059] Moreover, in this embodiment, the value of the second ammeter 29 can be collected by the collector 26 in addition to being recorded manually. A specific embodiment is that the test auxiliary device also includes: a second ammeter 29; a detection circuit connected between the upper lightning arrester 11 and the lower lightning arrester 12; the second ammeter 29 is connected in series in the grounding circuit at the bottom of the lower lightning arrester 12, and is used to detect the current flowing through the lower lightning arrester 12 at each moment including the first moment; the second ammeter 29 is connected to the collector 26 for communication, so that the collector 26 records the current at each moment detected by the second ammeter 29.

[0060] Similarly, on this basis, the second ammeter 29 is also preferably a microammeter, and the collector may also be added with a display module, an output module and other structures, which are not limited here.

[0061] In the double-section zinc oxide arrester DC leakage test auxiliary device provided in this embodiment, in addition to the power supply, the DC high-voltage generator and the first ammeter, a clock module and an ultrasonic sensor are also provided, so that the discharge moment of the double-section zinc oxide arrester during the power-on process, that is, the first moment, is obtained through ultrasound, and then the instantaneous current at the first moment is used as the effective current, which can make the measurement result more effective, the measurement effect better, and the credibility higher.

[0062] It should be noted that, although several structures, components or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, according to the specific implementation of the present application, the features and functions of two or more structures, components or units described above can be concretized in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided into multiple components, structures or units to be concretized.

[0063] In addition, although the components and the installation methods of the components or devices in the present application are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed according to the specific components or the installation methods of the components, or that all the components shown must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve corresponding functions, and / or one component can be decomposed into multiple components to achieve corresponding functions, etc.

[0064] Although the present application is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present application. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A double-section zinc oxide arrester DC leakage test auxiliary device, the double-section zinc oxide arrester comprises an upper section arrester and a lower section arrester, characterized in that: The test auxiliary device includes: a power supply, a DC high voltage generator, a first ammeter, a clock module, and an ultrasonic sensor; The power supply, the DC high voltage generator and the first ammeter are connected in series to form a grounded detection circuit; the power supply and the DC high voltage generator are used to provide a DC high voltage current flowing through the double-section zinc oxide arrester, and the first ammeter is used to detect the current flowing through the double-section zinc oxide arrester at each moment; The ultrasonic sensor is used to receive ultrasonic waves when the valve plates of the upper lightning arrester and the lower lightning arrester are turned on and discharged; The clock module is used to display the first moment when the ultrasonic sensor receives the ultrasonic wave.

2. The double-section zinc oxide arrester DC leakage test auxiliary device according to claim 1 is characterized in that: The test auxiliary device also includes: a collector for recording the current at each moment including the first moment; The clock module is arranged on the collector; the collector is respectively connected to the ultrasonic sensor and the first ammeter for communication.

3. The DC leakage test auxiliary device for double-section zinc oxide arrester according to claim 2 is characterized in that: The collector is also provided with a display module to display the current at each moment including the first moment.

4. The DC leakage test auxiliary device for double-section zinc oxide arrester according to claim 3 is characterized in that: The display module is a digital display module.

5. The double-section zinc oxide arrester DC leakage test auxiliary device according to claim 2 is characterized in that: The collector is a single chip microcomputer; an input unit of the single chip microcomputer is communicatively connected with an output unit of the ultrasonic sensor and an output unit of the ammeter.

6. The DC leakage test auxiliary device for double-section zinc oxide arrester according to claim 1 is characterized in that: The test auxiliary device also includes: a second ammeter; The detection circuit is connected between the upper lightning arrester and the lower lightning arrester; A second ammeter is connected in series in the grounding circuit at the bottom of the lower lightning arrester, and is used to detect the current flowing through the lower lightning arrester at each moment including the first moment.

7. The DC leakage test auxiliary device for double-section zinc oxide arrester according to claim 6 is characterized in that: The second ammeter is in communication connection with the collector, and the collector records the current at each moment detected by the second ammeter.

8. The double-section zinc oxide arrester DC leakage test auxiliary device according to claim 1 is characterized in that: There are at least two ultrasonic sensors.

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