CN116203493A - Measuring device and measuring method of high-voltage electrified display device - Google Patents

Abstract

The invention provides a measuring device and a measuring method for a high-voltage charged display device. The measuring device includes a measuring conductor having a grounding terminal and a measuring terminal for electrically connecting with a high-voltage charged display device. The voltage dividing element between the terminal and the measuring end, the voltage dividing element is connected in parallel with a voltmeter for measuring the voltage of the voltage dividing element and a switch for short-circuiting the voltage dividing element; the measurement method is to connect the high voltage live display device to be measured The ground wire of the voltage dividing element is provided, and at the same time, a voltmeter for measuring the voltage of the voltage dividing element and a switch for short-circuiting the voltage dividing element are installed in parallel at the voltage dividing element, and then the switch is switched to the measurement state, and then the bus is applied Test the voltage, observe the reading of the voltmeter, and judge whether the high-voltage live display device is qualified. The invention effectively solves the technical problem that the ground wire needs to be disconnected and connected many times and the measurement cost is high when measuring the high-voltage charged display device.

Description

A measuring device and measuring method for a high-voltage charged display device

technical field

The invention relates to a measuring device and a measuring method of a high-voltage electrified display device.

Background technique

The high-voltage live display device (VD) is a prompt safety device that can visually show whether the electrical equipment has operating voltage, and it is widely used in the field of GIS. When leaving the factory, it is necessary to measure the high-voltage live display device on the busbar barrel to judge whether it meets the technical requirements. In addition, before measuring the high-voltage live display device, it is necessary to carry out a withstand voltage test on the busbar bushing.

At present, before carrying out the withstand voltage test on the busbar bushing, it is necessary to 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 For the test of the live display device, since the output current of the high-voltage live display device is 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, and then use The measuring line connects the input end of the multimeter to the high-voltage live display device, and at the same time connects the output end of the multimeter to the grounding wire, applies a test voltage to the bus bar in the bus barrel, and judges whether the high-voltage live display device is qualified through the reading of the multimeter. After completing the measurement of a 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.

The above-mentioned measurement process has the following problems. First, when measuring the high-voltage live display device, it needs to disconnect the wiring many times, resulting in low measurement efficiency; second, the output current of the high-voltage live display device is microampere level, which requires high accuracy of the multimeter for measurement. High-precision multimeters are expensive and easy to burn out, resulting in high measurement costs, and it is not easy to realize simultaneous measurement of multiple high-voltage live display devices.

Contents of the invention

The purpose of the present invention is to provide a measuring device for a high-voltage charged display device to solve the problem of the need to disconnect and connect the grounding wire many times when measuring a high-voltage charged display device, resulting in low measurement efficiency and high-precision multimeters that are expensive, resulting in the measurement of high-voltage To solve the technical problem of high cost of the charged display device, at the same time, the present invention also provides a measurement method for the high-voltage charged display device.

In order to achieve the above object, the technical scheme of the measuring device of the high-voltage charged display device provided by the present invention is:

The measurement device of the high-voltage live display device includes a measurement conductor, the measurement conductor has a ground terminal and a measurement terminal for electrical connection with the high-voltage live display device, and the measurement conductor is provided with the ground terminal and the measurement terminal. A voltage-dividing element between terminals, and the voltage-dividing element is connected in parallel with a voltmeter for measuring the voltage of the voltage-dividing element and a switch for short-circuiting the voltage-dividing element.

Beneficial effects: before carrying out the 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 grounding of the busbar barrel, and the switch is switched to a short-circuit state. At this time, the measuring conductor is quite Connect the grounding wire of the high-voltage live display device, and then apply a test voltage to the busbar barrel to perform a withstand voltage test on the busbar barrel. After the withstand voltage test is completed, switch the switch to the measurement state, and the high-voltage live display device passes through the voltage divider. Grounding, apply a test voltage to the busbar in the busbar barrel, and judge whether the high-voltage live display device is qualified by observing the display of the ammeter. When the tool is performing a withstand voltage test and measuring a high-voltage live display device, it is only realized by switching the state of the switch. The circuit changes, and the grounding wire does not need to be disconnected and connected many times, which improves the measurement efficiency. At the same time, this tool uses a voltmeter to measure the high-voltage live display device, and does not need to use a high-precision multimeter, which reduces the measurement cost.

As a further improvement, the voltage dividing element is a rheostat.

Beneficial effect: the rheostat can adjust the divided voltage value by adjusting its own resistance value, and the measuring device can be applied to live display devices of different standards, thereby expanding the application range of the measuring device.

As a further improvement, the voltmeter is a digital voltmeter.

Beneficial effect: the reading of the digital voltmeter is more intuitive, and the volume is smaller than other voltmeters.

As a further improvement, the switch is a rotary switch.

Beneficial effect: the rotary switch is convenient to operate.

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

Beneficial effect: the voltage dividing element, the voltmeter and the switch are integrated in one casing, so that the volume of the device is smaller and easier to carry and store.

As a further improvement, the measuring end is provided with a conductive clip for clipping on the live display device.

Beneficial effect: the conductive clip is convenient to disassemble and assemble, and the measurement efficiency can be improved.

As a further improvement, the grounding end is provided with a conductive clip for clipping on the bus bar barrel.

Beneficial effect: the conductive clip is convenient to disassemble and assemble, and the measurement efficiency can be improved.

The technical scheme of the measurement method of the high-voltage charged display device provided by the present invention is:

The measurement method is to connect a grounding wire provided with a voltage dividing element on the charged display device that needs to be measured, and simultaneously install a voltmeter for measuring the voltage of the voltage dividing element in parallel at the voltage dividing element and a The grounding switch with the short circuit of the voltage dividing element, then switch the grounding switch to the measurement state, then apply the test voltage to the bus, observe the reading of the voltmeter to judge whether the measuring live display device is qualified.

Beneficial effects: when measuring the charged display device, connect one end of the grounding wire with the voltage dividing element to the live display device to be measured, and connect the other end to the ground of the bus bar cylinder, and realize the connection between the grounding line and the measuring line by switching the grounding switch. Switching avoids disconnecting and connecting the grounding wire multiple times when carrying out the withstand voltage test and measuring the live display device, which improves the measurement efficiency. At the same time, the method uses a voltmeter to measure the live display device without using a high-precision multimeter, which reduces the measurement cost.

As a further improvement, at the same time, connect the grounding wires provided with voltage dividing elements on multiple high-voltage charged display devices that need to be measured, and install a voltmeter for measuring the voltage of the corresponding voltage dividing element in parallel at each voltage dividing element. Short-circuit the switch corresponding to the voltage dividing element, then switch each switch to the measurement state, then apply the test voltage to the bus, observe the readings of each voltmeter to judge whether the corresponding measurement high-voltage live display device is qualified.

Beneficial effects: the method is to arrange grounding wires provided with voltage dividing elements on a plurality of high-voltage live display devices that need to be measured, and only need to apply a test voltage once during measurement to measure multiple high-voltage live display devices at the same time , while reducing the test cost, it also improves the measurement efficiency.

As a further improvement, the standard value is correspondingly determined according to different test voltages and different voltage division values of the voltage dividing 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 .

Beneficial effects: the tester can quickly and accurately judge the measurement result by comparing the voltage indication number with the standard value, which is beneficial to improve the measurement efficiency.

Description of drawings

FIG. 1 is a schematic structural view of a measuring device for a high-voltage charged display device provided by the present invention.

The names of the components corresponding to the corresponding reference numerals in the figure are:

1. Measuring conductor; 11. Grounding terminal; 12. Measuring terminal; 2. Rheostat; 3. Digital voltmeter; 4. Knob switch.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that in the specific embodiments of the present invention, possible terms such as "first" and "second" and other relative terms are only used to distinguish one entity or operation from another entity or operation , without necessarily requiring or implying any actual relationship or order between these entities or operations. Moreover, the possible occurrences of terms such as "comprises", "comprises" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or means comprising a set of elements includes not only those elements, but also includes Other elements not expressly listed, or elements inherent in such process, method, article, or implement. Without further limitations, the phrase "comprising a ..." and other qualifying elements that may appear does not exclude the presence of additional same elements in the process, method, article, or tool that includes said elements.

In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrally connected; may be mechanically connected, may also be electrically connected; may be directly connected, may also be indirectly connected through an intermediary, or may be internal communication between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

In the description of the present invention, unless otherwise clearly specified and limited, the term "has to be" that may appear should be understood in a broad sense, for example, the object of "has to be" can be a part of the body, or it can be separated from the body Arranged and connected on the body, the connection can be detachable or non-detachable. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

Below in conjunction with embodiment the present invention is described in further detail.

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

As shown in Figure 1, the measuring device of the high-voltage charged display device provided by the present invention comprises a measuring conductor 1, and the measuring conductor 1 has a ground terminal 11 and a measuring terminal 12 for being electrically connected with the high-voltage charged display device, and the measuring conductor 1 is also provided with There is a voltage dividing element between the ground terminal 11 and the measuring terminal 12, and the voltage dividing element is connected in parallel with a voltmeter for measuring the voltage of the voltage dividing element and a switch for short-circuiting the voltage dividing element. When testing and measuring the high-voltage live display device, the circuit change is realized only by switching the state of the switch, avoiding multiple disconnection and connection of the grounding wire, and improving the measurement efficiency. At the same time, this tool uses a voltmeter to measure the high-voltage live display device. Accurate multimeters reduce measurement costs.

Specifically, the measuring conductor 1 is a grounding wire and has a grounding terminal 11 and a measuring terminal 12. The grounding terminal 11 is provided with a grounding conductive clip for clamping on the busbar barrel, and the measuring terminal 12 is provided with a clamp for clamping on a high-voltage The measuring conductive clip on the charged display device, the above-mentioned grounding line is provided with a voltage dividing element, the voltage dividing element is a rheostat 2, and a voltmeter is connected in parallel with the rheostat 2, the voltmeter is a digital transformer, and the digital transformer can accurately The voltage across the rheostat 2 is detected. In addition, the rheostat 2 is also connected in parallel with a switch, which is a rotary switch 4, and the rotary switch 4 has two switchable gear positions, one of which is the gear of the measurement state, and the other gear is the short circuit When the rotary switch 4 is turned to the measurement 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 the short-circuited state. At the same time, for the convenience of carrying and storage, the rheostat 2, the rotary switch 4, and the digital voltmeter 3 are integrated in a same housing, which is an insulating box.

When carrying out the withstand voltage test on the busbar bushing, the measuring conductive clamp on the test conductor is clamped on the high-voltage live display device to be tested, and the grounding conductive clamp on the test conductor is clamped on the busbar barrel, and then the The rotary switch 4 is rotated to the short-circuit state, and now the rheostat 2 is in the short-circuit state, and the test conductor is equivalent to the ground wire of the high-voltage electrified display device, and the test voltage is applied to the busbar barrel to complete the withstand voltage test of the busbar barrel. After the withstand voltage test is completed, it is necessary to measure the high-voltage live display device on the busbar cylinder. At this time, turn the rotary switch 4 to the measurement state. At this time, the high-voltage live display device is grounded through the rheostat 2 and applies a test to the busbar in the busbar cylinder. Voltage, the high-voltage charged display device is powered by voltage induction, so that current flows through the rheostat 2, and the voltage at both ends of the rheostat 2 can be measured through the digital varistor, and the reading of the digital voltmeter 3 can be observed, and compared with the corresponding standard Value comparison can quickly confirm whether the tested high-voltage live display device is qualified.

In this embodiment, due to the different test voltages required by different high-voltage charged display devices, the corresponding voltage division values required by the rheostat 2 during detection are different, so that the rheostats 2 with different voltage division values are different under different test voltages. The voltage values at the terminals are different, and the test obtains these voltage values and arranges them to obtain the above-mentioned standard value. When the tester performs the measurement, he finds the corresponding standard value according to the current test voltage and the divided voltage value of the rheostat 2, and the test obtained The voltage value 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.

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 bus barrel, When carrying out the withstand voltage test on the bus barrel, the measuring devices provided by this embodiment can be installed at multiple high-voltage live display devices on the bus barrel, and the rotary switches 4 on these measuring devices are turned to the short-circuit state, The test can be completed by applying a measurement voltage to the busbar cylinder. When testing the high-voltage live display device, turn the rotary switch 4 to the measurement state. There is no need to disconnect the ground wire. Apply the test voltage to the busbar in the busbar cylinder and observe the above-mentioned By measuring the voltmeter reading on the device and comparing the reading with the standard value, you can quickly confirm whether the corresponding high-voltage live display device is qualified, so that you only need to apply the test voltage once, and you can measure multiple high-voltage live display devices at the same time. While reducing the measurement cost, the measurement efficiency is improved, and compared with a high-precision multimeter with a single cost of about 3,000 yuan, the cost of using multiple measurement devices to simultaneously monitor multiple high-voltage live display devices still has advantages.

Embodiment 2 of the measuring device of the middle and high voltage charged display device of the present invention:

The difference between this embodiment and Embodiment 1 lies in the voltage dividing element. In Embodiment 1, the voltage dividing element is a varistor. In this embodiment, however, the voltage dividing element is a voltage dividing coil.

Embodiment 3 of the measuring device of the middle and high voltage charged display device of the present invention:

The difference between this embodiment and Embodiment 1 lies in the voltmeter. In Embodiment 1, the voltmeter is a digital voltmeter. In this embodiment, the voltmeter is a pointer voltmeter.

Embodiment 4 of the measuring device of the middle and high voltage charged display device of the present invention:

The difference between this embodiment and Embodiment 1 lies in the switch. In Embodiment 1, the switch is a rotary switch. In this embodiment, the switch is a push button switch.

Embodiment 1 of the measurement method of the middle and high voltage charged display device of the present invention:

The method provided in this embodiment is to install the grounding wire on the measuring device of the high-voltage live display device on the high-voltage live display device on the bus bushing under test when carrying out the withstand voltage test on the bus bushing. There is a voltage-dividing element, and the voltage-dividing element is connected in parallel with a voltmeter for measuring the voltage of the voltage-dividing element and a switch for short-circuiting the voltage-dividing element, and switching the switch to a short-circuit state. The test voltage is applied to the bushing to complete the withstand voltage test. After the withstand voltage test is over, switch the switch to the measurement state. At this time, the high-voltage live display device is grounded through the voltage dividing element, and the test voltage is applied to the busbar barrel in the busbar barrel. Observe the indication of the voltmeter and compare it with the corresponding standard. Value comparison, 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.

In this embodiment, the varistors with different voltage division values have different voltage values at both ends of the varistors under different test voltages. These voltage values are obtained from the test and sorted out to obtain the above-mentioned standard values. When testing the high-voltage charged display device, according to For the corresponding divided voltage value and test voltage, find the corresponding standard value, and compare the tested voltage with the standard value.

The measuring device of the high-voltage charging display device in this embodiment has the same structure as that in the above-mentioned embodiment 1 of the measuring device of the high-voltage charging display device, and will not be repeated here.

In other embodiments, the structure of the measurement device of the high-voltage charging display device can also adopt the structure of any one of the above-mentioned embodiments 2 to 4 of the measurement device of the high-voltage charging display device, and will not be repeated here.

Embodiment 2 of the measurement method of the middle and high voltage charged display device of the present invention:

The method provided in this embodiment is to simultaneously measure a plurality of high-voltage live display devices on the bus barrel, and the specific operation is to install the grounding wires on the measurement devices of the high-voltage live display devices respectively On the high-voltage live display device, 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 bus bushing to complete the withstand voltage test. After the withstand voltage test is over, switch each switch to the measurement state, observe the readings of the voltmeter on the measuring device of each high-voltage live display device, and compare it with the standard value to quickly judge whether each high-voltage live display device is qualified. A plurality of high-voltage charged display devices can be measured at the same time by one test voltage, which reduces the measurement cost and improves the measurement efficiency. At the same time, there is no need to reciprocally disassemble and assemble the grounding wire, which improves the work efficiency. In addition, the testers only need to stand by and observe when testing, which reduces the risk of operation.

The measuring device of the high-voltage charging display device in this embodiment has the same structure as that in the above-mentioned embodiment 1 of the measuring device of the high-voltage charging display device, and will not be repeated here.

In other embodiments, the structure of the measurement device of the high-voltage charging display device can also adopt the structure of any one of the above-mentioned embodiments 2 to 4 of the measurement device of the high-voltage charging display device, and will not be repeated here.

The above 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 is subject to the claims. Any equivalent structural changes made by using the description and accompanying drawings of the present invention, All should be included in the protection scope of the present invention in the same way.

Claims (10)

1. A measuring device for a high-voltage charged display device, characterized in that it includes a measuring conductor (1), and the measuring conductor (1) has a grounding terminal (11) and a measuring terminal for electrical connection with a high-voltage charged display device ( 12), and the measuring conductor (1) is provided with a voltage dividing element between the ground terminal (11) and the measuring terminal (12), and the voltage dividing element is connected in parallel for measuring the divided voltage A voltmeter for the element voltage and a switch for short-circuiting the voltage dividing element. 2. The measuring device of a high-voltage charged display device according to claim 1, characterized in that, the voltage dividing element is a rheostat (2). 3. The measuring device of the high-voltage charged display device according to claim 1, characterized in that the voltmeter is a digital voltmeter (3). 4. The measuring device of the high-voltage charged display device according to claim 1, characterized in that the switch is a rotary switch (4). 5. The measuring device of the high-voltage charged display device according to claim 1, 2, 3 or 4, characterized in that, the voltage dividing element, the voltmeter and the switch are arranged in the same casing. 6. The measuring device of the high-voltage charged display device according to claim 5, characterized in that, the measuring end (12) is provided with a conductive clip for clamping on the high-voltage charged display device. 7. The measuring device of the high-voltage charged display device according to claim 5, characterized in that, the grounding terminal (11) is provided with a conductive clip for clamping on the busbar barrel. 8. A measuring method for a high-voltage charged display device, characterized in that, the method is to connect a grounding wire provided with a voltage dividing element on the high-voltage charged display device to be measured, and simultaneously install in parallel at the voltage dividing element for A voltmeter for measuring the voltage of the voltage dividing element and a switch for short-circuiting the voltage dividing element, then switching the switch to the measurement state, and then applying a test voltage to the bus bar, observing the reading of the voltmeter to judge and measure the high voltage charged display Whether the device is qualified. 9. the measuring method of high-voltage charged display device according to claim 8, is characterized in that, simultaneously on a plurality of high-voltage charged display devices that need to be measured, connect respectively the ground wire that is provided with voltage dividing element, and in each voltage dividing element Install a voltmeter for measuring the voltage of the corresponding voltage-dividing element and a switch for short-circuiting the corresponding voltage-dividing element in parallel, then switch each switch to the measurement state, then apply a test voltage to the bus, and observe the readings of each voltmeter to judge the corresponding Measure whether the high-voltage live display device is qualified. 10. The measuring method of the high-voltage charged display device according to claim 8 or 9, characterized in that, according to different test voltages and different voltage division values of the voltage division elements, the standard value is correspondingly determined, if the reading of the voltmeter is the same as the corresponding If the standard values are the same, the measuring high-voltage live display device is qualified, otherwise the high-voltage live display device is unqualified.

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