A measuring device and a measuring method for a high voltage live display device

Abstract

The present invention provides a measuring device and method for a high-voltage live display device. The measuring device includes a measuring conductor having a ground terminal and a measuring terminal for electrically connecting to the high-voltage live display device. The measuring conductor is provided with a voltage divider element located between the ground terminal and the measuring terminal. The voltage divider element is connected in parallel with a voltmeter for measuring the voltage of the voltage divider element and a switch for short-circuiting the voltage divider element. The measuring method comprises connecting a ground wire provided with a voltage divider element to the high-voltage live display device to be measured, and simultaneously installing a voltmeter for measuring the voltage of the voltage divider element and a switch for short-circuiting the voltage divider element in parallel at the voltage divider element. The switch is then switched to a measuring state, and a test voltage is applied to a busbar. The voltmeter reading is observed to determine whether the high-voltage live display device is qualified. The present invention effectively solves the technical problem of requiring multiple disconnection of the ground wire when measuring a high-voltage live display device and the high measurement cost.

Description

Technical Field

[0001] The invention relates to a measuring device and a measuring method for a high-voltage charged display device. Background Art

[0002] The high-voltage live indicator (VD) is a safety device that visually indicates whether electrical equipment is operating at voltage. It is widely used in the GIS field. Before shipment, the VD on the busbar barrel must be measured to determine whether it meets technical requirements. Furthermore, the busbar bushing must undergo a withstand voltage test before testing the VD.

[0003] Currently, before conducting a withstand voltage test on a busbar bushing, it is necessary to first ground the high-voltage live display device on the busbar bushing, and then apply a test voltage to the busbar bushing to complete the test. After the withstand voltage test is completed, the high-voltage live display device can be tested. Since the output operating current of the high-voltage live display device is in the microampere level, a high-precision multimeter must be used for measurement. When measuring, it is necessary to first remove the end of the ground wire connected to the high-voltage live display device, then use the measuring wire to connect the input end of the multimeter to the high-voltage live display device, and at the same time connect the output end of the multimeter to the ground wire. Apply a test voltage to the busbar in the busbar barrel, and judge whether the high-voltage live display device is qualified based on the multimeter reading. After completing the measurement of one high-voltage live display device, remove the multimeter and restore the connection between the ground wire and the high-voltage live display device, and then measure the next high-voltage live display device.

[0004] The above measurement process has the following problems: first, when measuring the high-voltage live display device, the wiring needs to be disconnected multiple times, resulting in low measurement efficiency; second, the output working current of the high-voltage live display device is in the microampere level, which requires high accuracy of the multimeter used for measurement. High-precision multimeters are expensive and easy to burn out, resulting in high measurement costs and making it difficult to achieve simultaneous measurement of multiple high-voltage live display devices. Summary of the Invention

[0005] The purpose of the present invention is to provide a measuring device for a high-voltage live display device to solve the current technical problems that when measuring a high-voltage live display device, the grounding wire needs to be disconnected and connected multiple times, resulting in low measurement efficiency, and high-precision multimeters are expensive, resulting in high costs for measuring high-voltage live display devices. At the same time, the present invention also provides a measuring method for a high-voltage live display device.

[0006] To achieve the above-mentioned purpose, the technical solution of the measuring device of the high-voltage live display device provided by the present invention is:

[0007] The measuring device of the high-voltage live display device includes a measuring conductor, which has a grounding end and a measuring end for electrically connecting to the high-voltage live display device, and a voltage divider element located between the grounding end and the measuring end is provided on the measuring conductor. The voltage divider element is connected in parallel with a voltmeter for measuring the voltage of the voltage divider element and a switch for short-circuiting the voltage divider element.

[0008] Beneficial effect: Before conducting a withstand voltage test on the busbar barrel, the measuring end of the measuring device is connected to the high-voltage live display device, the grounding end is connected to the ground of the busbar barrel, and the switch is switched to the short-circuit state. At this time, the measuring conductor is equivalent to the grounding wire of the high-voltage live display device. Then, a test voltage is applied to the busbar barrel to conduct a withstand voltage test on the busbar barrel. After the withstand voltage test is completed, the switch is switched to the measuring state. The high-voltage live display device is grounded through the voltage divider element, and a test voltage is applied to the busbar in the busbar barrel. Whether the high-voltage live display device is qualified can be judged by observing the meter reading. When conducting a withstand voltage test and measuring a high-voltage live display device, the tool only realizes circuit changes by switching the state of the switch. There is no need to disconnect the ground wire multiple times, which improves measurement efficiency. At the same time, this tool uses a voltmeter to measure the high-voltage live display device, and does not require a high-precision multimeter, which reduces measurement costs.

[0009] As a further improvement, the voltage dividing element is a variable resistor.

[0010] Beneficial effects: The variable resistor can adjust the voltage divider value by adjusting its own resistance value. The measuring device can be applied to charged display devices of different standards, thereby expanding the scope of use of the measuring device.

[0011] As a further improvement, the voltmeter is a digital voltmeter.

[0012] Beneficial effects: The digital voltmeter has more intuitive readings and is smaller than other voltmeters.

[0013] As a further improvement, the switch is a knob switch.

[0014] Beneficial effect: The knob switch is easy to operate.

[0015] As a further improvement, the voltage dividing element, the voltmeter and the switch are arranged in the same housing.

[0016] Beneficial effects: The voltage divider element, the voltmeter and the switch are integrated into one housing, making the device smaller in size and easier to carry and store.

[0017] As a further improvement, a conductive clip for clamping onto a charge display device is provided at the measuring end.

[0018] Beneficial effects: The conductive clip is easy to assemble and disassemble, which can improve measurement efficiency.

[0019] As a further improvement, a conductive clip for clamping on the busbar barrel is provided at the grounding end.

[0020] Beneficial effects: The conductive clip is easy to assemble and disassemble, which can improve measurement efficiency.

[0021] The technical solution of the measurement method of the high-voltage live display device provided by the present invention is:

[0022] The measurement method is to connect a grounding wire provided with a voltage divider element to the live display device to be measured, and at the same time install a voltmeter for measuring the voltage of the voltage divider element and a grounding switch for short-circuiting the voltage divider element in parallel at the voltage divider element, then switch the grounding switch to the measurement state, and then apply a test voltage to the busbar, observe the reading of the voltmeter to determine whether the measured live display device is qualified.

[0023] Beneficial effect: When measuring a live display device, one end of the grounding wire with a voltage divider element is connected to the live display device to be measured, and the other end is connected to the busbar body ground. By switching the grounding switch, the grounding circuit and the measurement circuit are switched, avoiding multiple disconnections of the grounding wire when conducting a withstand voltage test and measuring the live display device, thereby improving measurement efficiency. At the same time, this method uses a voltmeter to measure the live display device, and does not require a high-precision multimeter, thereby reducing measurement costs.

[0024] As a further improvement, grounding wires with voltage divider elements are connected to multiple high-voltage live display devices that need to be measured at the same time, and a voltmeter for measuring the voltage of the corresponding voltage divider element and a switch for short-circuiting the corresponding voltage divider element are installed in parallel at each voltage divider element. Then, each switch is switched to the measuring state, and a test voltage is applied to the busbar. The readings of each voltmeter are observed to determine whether the corresponding measured high-voltage live display device is qualified.

[0025] Beneficial effect: This method is to arrange grounding wires with voltage divider elements on multiple high-voltage live display devices that need to be measured. During measurement, only one test voltage needs to be applied to measure multiple high-voltage live display devices at the same time, which reduces the test cost and improves the measurement efficiency.

[0026] As a further improvement, the standard value is determined according to different test voltages and different voltage divider values ​​of the voltage divider element. If the reading of the voltmeter is consistent with the corresponding standard value, the high-voltage live display device is qualified, otherwise the high-voltage live display device is unqualified.

[0027] Beneficial effect: Testers can quickly and accurately judge the measurement results by comparing the voltage display number with the standard value, which is conducive to improving measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the measuring device of the high-voltage live display device provided by the present invention.

[0029] The names of the components corresponding to the corresponding reference numerals in the figures are:

[0030] 1. Measuring conductor; 11. Ground terminal; 12. Measuring terminal; 2. Variable resistor; 3. Digital voltmeter; 4. Rotary switch. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0033] It should be noted that, in the specific embodiments of the present invention, terms such as "first" and "second" and other relational terms that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that a process, method, article or tool that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or tool. In the absence of further restrictions, the phrase "including a ..." and other defined elements that may appear do not exclude the presence of other identical elements in the process, method, article or tool that includes the elements.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] In the description of the present invention, unless otherwise expressly specified or limited, the terms "provided with" and "provided with" should be understood broadly. For example, the object "provided with" may be a part of the main body, or may be arranged separately from the main body and connected to the main body. The connection may be detachable or non-detachable. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] The present invention is described in further detail below with reference to the examples.

[0037] Embodiment 1 of the measuring device of the high-voltage charged display device provided in the present invention:

[0038] like Figure 1 As shown, the measuring device of the high-voltage live display device provided by the present invention includes a measuring conductor 1, the measuring conductor 1 has a grounding terminal 11 and a measuring terminal 12 for electrically connecting to the high-voltage live display device, and the measuring conductor 1 is also provided with a voltage divider element located between the grounding terminal 11 and the measuring terminal 12, and the voltage divider element is connected in parallel with a voltmeter for measuring the voltage of the voltage divider element and a switch for short-circuiting the voltage divider element. When performing a withstand voltage test and measuring a high-voltage live display device, the measuring device only realizes circuit changes by switching the state of the switch, avoiding multiple disconnections of the grounding wire and improving measurement efficiency. At the same time, this tool uses a voltmeter to measure the high-voltage live display device, and does not require a high-precision multimeter, thereby reducing measurement costs.

[0039] Specifically, the measuring conductor 1 is a grounding wire having a grounding end 11 and a measuring end 12. The grounding end 11 is provided with a grounding conductive clip for clamping onto the busbar barrel, and the measuring end 12 is provided with a measuring conductive clip for clamping onto the high-voltage live display device. The grounding wire is provided with a voltage divider element, which is a rheostat 2. A voltmeter is connected in parallel to the rheostat 2. The voltmeter is a digital transformer, which can accurately detect the voltage across the rheostat 2. In addition, a switch is connected in parallel to the rheostat 2. The switch is a rotary switch 4. The rotary switch 4 has two switchable positions, one of which is a measuring state position and the other is a short-circuit state position. When the rotary switch 4 is turned to the measuring state, the rheostat 2 provides a voltage dividing function. When the rotary switch 4 is turned to the short-circuit state, the rheostat 2 is in a short-circuited state. At the same time, in order to facilitate carrying and storage, the variable resistor 2, the knob switch 4, and the digital voltmeter 3 are integrated into the same housing, which is an insulating box.

[0040] When conducting a withstand voltage test on a busbar bushing, the measuring conductive clip on the test conductor is mounted on the high-voltage live display device to be tested, and the grounding conductive clip on the test conductor is mounted on the busbar barrel. Then, the knob switch 4 is turned to the short-circuit state. At this time, the rheostat 2 is in a short-circuited state. The test conductor is equivalent to the grounding wire of the high-voltage live display device. A test voltage is applied to the busbar barrel to complete the withstand voltage test on the busbar barrel. After the withstand voltage test is completed, the high-voltage live display device on the busbar barrel needs to be measured. At this time, the knob switch 4 is rotated to the measuring state. At this time, the high-voltage live display device is grounded through the rheostat 2. A test voltage is applied to the bus in the busbar barrel. The high-voltage live display device is energized by voltage induction, so that current passes through the rheostat 2. The voltage across the rheostat 2 can be measured by a digital transformer. The reading of the digital voltmeter 3 is observed and compared with the corresponding standard value to quickly confirm whether the tested high-voltage live display device is qualified.

[0041] In this embodiment, since different high-voltage live display devices require different test voltages, the corresponding voltage divider values ​​required by the variable resistor 2 during detection are different, so that the voltage values ​​at both ends of the variable resistor 2 are different under different test voltages for the variable resistor 2 with different voltage divider values. These voltage values ​​are obtained by testing and sorted out to obtain the above-mentioned standard values. When the tester performs measurement, the corresponding standard value is found according to the current test voltage and the voltage divider value of the variable resistor 2, and the voltage value obtained by the test is compared with the standard value. If the voltage value obtained by the test is the same as the standard value, the tested high-voltage live display device is qualified, otherwise the tested high-voltage live display device is unqualified.

[0042] The measuring device of the high-voltage live display device provided in this embodiment uses a voltmeter to measure the high-voltage live display device. The cost of each voltmeter is about 30 yuan. Since there are usually multiple high-voltage live display devices on the busbar barrel, when the busbar barrel is subjected to a withstand voltage test, the measuring device provided in this embodiment can be installed at the multiple high-voltage live display devices on the busbar barrel. The knob switches 4 on these measuring devices are turned to the short-circuit state, and the measurement voltage is applied to the busbar barrel to complete the test. When testing the high-voltage live display device, the knob switch 4 is turned to the measurement state, and there is no need to disconnect the ground wire. The test voltage is applied to the bus in the busbar barrel. The voltmeter readings on each of the above-mentioned measuring devices are observed and compared with the standard value to quickly confirm whether the corresponding high-voltage live display device is qualified. In this way, only one test voltage needs to be applied to measure multiple high-voltage live display devices at the same time, which reduces the measurement cost while improving the measurement efficiency. Compared with a high-precision multimeter with a single cost of about 3,000 yuan, the cost of using multiple measuring devices to measure multiple high-voltage live display devices at the same time is still advantageous.

[0043] Embodiment 2 of the measuring device of the high-voltage live display device of the present invention:

[0044] The difference between this embodiment and embodiment 1 lies in the voltage dividing element. In embodiment 1, the voltage dividing element is a varistor, while in this embodiment, the voltage dividing element is a voltage dividing coil.

[0045] Embodiment 3 of the measuring device of the high-voltage live display device of the present invention:

[0046] The difference between this embodiment and embodiment 1 lies in the voltmeter. In embodiment 1, the voltmeter is a digital voltmeter, while in this embodiment, the voltmeter is a pointer voltmeter.

[0047] Example 4 of the measuring device of the high-voltage live display device of the present invention:

[0048] The difference between this embodiment and embodiment 1 lies in the switch. In embodiment 1, the switch is a knob switch, while in this embodiment, the switch is a push button switch.

[0049] Example 1 of the method for measuring a high-voltage charged display device according to the present invention:

[0050] The method provided in this embodiment is that when performing a withstand voltage test on a busbar bushing, the grounding wire on the measuring device of the high-voltage live display device is installed on the high-voltage live display device on the busbar bushing to be tested, and a voltage divider element is provided on the grounding wire. At the same time, the voltage divider element is connected in parallel with a voltmeter for measuring the voltage of the voltage divider element and a switch for short-circuiting the voltage divider element. The switch is switched to the short-circuit state. At this time, the voltage divider element is short-circuited, and a test voltage is applied to the busbar bushing to complete the withstand voltage test. After the withstand voltage test is completed, the switch is switched to the measuring state. At this time, the high-voltage live display device is grounded through the voltage divider element, and a test voltage is applied to the busbar barrel in the busbar barrel body. The reading of the voltmeter is observed and compared with the corresponding standard value. If the voltage value obtained by the test is the same as the standard value, the high-voltage live display device under test is qualified. Otherwise, the high-voltage live display device under test is unqualified.

[0051] In this embodiment, the voltage values ​​at both ends of the variable resistor are different under different test voltages for different voltage division values. These voltage values ​​are obtained through testing and sorted out to obtain the above-mentioned standard value. When testing the high-voltage live display device, the corresponding standard value is found according to the corresponding voltage division value and test voltage, and the tested voltage is compared with the standard value.

[0052] The structure of the measuring device of the high-voltage live charge display device in this embodiment is the same as that of the measuring device of the high-voltage live charge display device in the above-mentioned embodiment 1, and will not be repeated here.

[0053] In other embodiments, the structure of the measuring device of the high-voltage live display device may also adopt the structure of any one of the above-mentioned measuring device embodiments 2 to 4 of the high-voltage live display device, which will not be repeated here.

[0054] Example 2 of the measurement method of the high-voltage charged display device of the present invention:

[0055] The method provided in this embodiment is to simultaneously measure multiple high-voltage live display devices on the busbar barrel. The specific operation is to install the grounding wire on the measuring device of the high-voltage live display device on each high-voltage live display device on the tested busbar bushing, switch the switch on the measuring device of each high-voltage live display device to the short-circuit state, and apply the test voltage to the busbar bushing to complete the withstand voltage test. After the withstand voltage test is completed, each switch is switched to the measurement state, and the reading of the voltmeter on the measuring device of each high-voltage live display device is observed. By comparing it with the standard value, it can be quickly determined whether each high-voltage live display device is qualified. Only one test voltage needs to be applied to measure multiple high-voltage live display devices at the same time, which reduces the measurement cost and improves the measurement efficiency. At the same time, there is no need to disassemble and assemble the grounding wire back and forth, which improves work efficiency. In addition, during the inspection, the tester only needs to stand by and observe, which reduces the operational risk.

[0056] The structure of the measuring device of the high-voltage live charge display device in this embodiment is the same as that of the measuring device of the high-voltage live charge display device in the above-mentioned embodiment 1, and will not be repeated here.

[0057] In other embodiments, the structure of the measuring device of the high-voltage live display device may also adopt the structure of any one of the above-mentioned measuring device embodiments 2 to 4 of the high-voltage live display device, which will not be repeated here.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A method for measuring a high-voltage live display device, characterized in that: The method comprises the following steps: connecting a grounding wire provided with a voltage divider element to a high-voltage live display device to be measured; simultaneously, installing a voltmeter for measuring the voltage of the voltage divider element and a switch for short-circuiting the voltage divider element in parallel at the voltage divider element; setting the switch to a short-circuit state; applying a test voltage to a busbar barrel to complete a withstand voltage test on the busbar barrel; then switching the switch to a measuring state; then applying a test voltage to the busbar; observing the reading of the voltmeter; and comparing it with a corresponding standard value to determine whether the high-voltage live display device is qualified; when multiple high-voltage live display devices need to be measured, simultaneously Multiple high-voltage live display devices that need to be measured are respectively connected to ground wires with voltage divider elements, and a voltmeter for measuring the voltage of the corresponding voltage divider element and a switch for short-circuiting the corresponding voltage divider element are installed in parallel at each voltage divider element. Then, each switch is switched to the measurement state, and then a test voltage is applied to the busbar. The readings of each voltmeter are observed to determine whether the corresponding measured high-voltage live display device is qualified; the standard value is determined according to different test voltages and different voltage divider values ​​of the voltage divider element. If the reading of the voltmeter is consistent with the corresponding standard value, the measured high-voltage live display device is qualified, otherwise the high-voltage live display device is unqualified.

2. The method for measuring a high-voltage live display device according to claim 1, wherein: The voltage dividing element is a variable resistor (2).

3. The method for measuring a high-voltage live display device according to claim 1, wherein: The voltmeter is a digital voltmeter (3).

4. The method for measuring a high-voltage live display device according to claim 1, wherein: The switch is a knob switch (4).

5. The method for measuring a high-voltage charge display device according to claim 2, 3 or 4, wherein: The voltage dividing element, the voltmeter and the switch are arranged in a same housing.

6. The method for measuring a high-voltage live display device according to claim 1, wherein: The grounding wire is provided with a conductive clip for being clamped on the high-voltage charged display device.

7. The method for measuring a high-voltage live display device according to claim 1, wherein: The grounding wire is provided with a conductive clip for clamping on the busbar barrel.

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