CN214310667U - Transmission line induced voltage testing arrangement - Google Patents
Transmission line induced voltage testing arrangement Download PDFInfo
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- CN214310667U CN214310667U CN202120300372.1U CN202120300372U CN214310667U CN 214310667 U CN214310667 U CN 214310667U CN 202120300372 U CN202120300372 U CN 202120300372U CN 214310667 U CN214310667 U CN 214310667U
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 25
- 239000000523 sample Substances 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a transmission line induced voltage testing device, which relates to the technical field of electrical testing in an electric power system, and is characterized in that a metal probe, a measuring rod, a grounding terminal, a meter connecting terminal, a multimeter and an insulating rod are arranged; the metal detection piece is positioned on the measuring rod and is electrically connected with the voltage division type resistor in the measuring rod; the grounding terminal and the meter connecting terminal are respectively positioned on the measuring rod and are respectively electrically connected with the voltage-dividing resistor; the universal meter is electrically connected with the meter connecting terminal; the insulating rod is detachably and fixedly arranged below the measuring rod. This application is visited the piece through the metal and is tested circuit electric connection, and ground terminal and earth electric connection connect table terminal and universal meter electric connection for the partial pressure formula resistance transmission that is measured the stick by test line high voltage induced electricity is for current universal meter, just can realize having measured the induced voltage of being surveyed the circuit, and convenient to use is swift, and simple structure, safer.
Description
Technical Field
The utility model relates to an electrical test technical field among the electric power system, concretely relates to transmission line induced voltage testing arrangement.
Background
With the increase of the extension of transformer substations and newly-built transmission lines, in order to fully utilize line corridors, the conditions of parallelly erecting double-circuit transmission lines and four-circuit transmission lines and cross-line spanning erection are more and more. In consideration of power supply reliability, the adjacent lines often cannot be accompanied and stopped during power transmission line testing, and under the condition that field interference is serious, induced voltage in the tested line can reach thousands of volts or even tens of thousands of volts, and the principle of the induced voltage is as follows: because the high-voltage transmission lines are arranged in parallel, distributed capacitance exists between the high-voltage lines, and mutual inductance can be generated between the lines. When the line is overhauled in a power failure mode, the electrified line can generate induced voltage for the power failure line.
However, after the power transmission line is built, modified and expanded, the line parameter test, the insulation test, the phase sequence check and the like need to be performed on the line before the power transmission is put into operation. Because the circuit tested often can produce induced voltage, induced voltage can reach thousands of volts or even tens of thousands of volts under the serious condition, consequently before carrying out these tests, need test the induced voltage on the transmission line earlier to directly perceived, convenient understanding induced voltage size does benefit to and takes corresponding safeguard measure in advance, ensures tester's the personal and test instrument's safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a transmission line induced voltage testing arrangement aims at solving the induced voltage of present stage on to transmission line and tests inconvenient technical problem.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a transmission line induced voltage testing device comprises a metal probe, a measuring rod, a grounding terminal, a meter connecting terminal, a multimeter and an insulating rod; the metal detection piece is positioned on the measuring rod and is electrically connected with the voltage division type resistor in the measuring rod; the grounding terminal and the meter connecting terminal are respectively positioned on the measuring rod and are respectively electrically connected with the voltage-dividing resistor; the universal meter is electrically connected with the meter connecting terminal; the insulating rod is detachably and fixedly arranged below the measuring rod.
As a further improvement of the invention, the metal probe comprises a metal probe hook and a probe; the probe is positioned on the outer side edge of the metal probe hook.
As a further improvement of the present invention, the voltage dividing resistor includes an upper resistor and a lower resistor; the upper resistor and the lower resistor are connected in series; the resistance value of the upper resistor is far larger than that of the lower resistor; the universal meter is electrically connected with the two ends of the lower resistor through the meter connecting terminals.
As a further improvement of the invention, the upper resistor has a resistance value of
The lower resistance value is
As a further improvement of the present invention, the ground terminal is electrically connected to the ground.
As a further improvement of the invention, the meter connecting terminal is an aerial connector structure.
As a further improvement of the invention, the inner joint end of the aerial plug is respectively and electrically connected with the lower resistor and the grounding terminal, and the outside of the aerial plug is electrically connected with a measuring joint of the multimeter through two led-out red and black wires.
As a further development of the invention, the insulating rod is screwed to the measuring rod.
As a further improvement of the invention, the tail part of the insulating rod is a handheld part, the outer surface of the top part of the insulating rod is provided with external threads, and the insulating rod and the bottom part of the measuring rod are connected together through threads.
Compared with the prior art, the beneficial effects of the utility model are that:
this application is visited the piece through the metal and is tested circuit electric connection, and ground terminal and earth electric connection connect table terminal and universal meter electric connection for the partial pressure formula resistance transmission that is measured the stick by test line high voltage induced electricity is for current universal meter, just can realize having measured the induced voltage of being surveyed the circuit, and convenient to use is swift, and simple structure, safer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rod structure according to the present invention;
FIG. 3 is a schematic illustration of the principles of the present invention;
the reference numbers in the figures illustrate:
1. a metal probe; 11. a metal feeler; 12. a probe; 2. measuring the rod; 21. a voltage division resistor; 211. an upper resistor; 212. a lower resistance; 3. a ground terminal; 4. a meter connecting terminal; 5. a universal meter; 6. an insulating rod.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
With reference to fig. 1 to 3, the invention provides a device for testing induced voltage of a power transmission line, and aims to solve the technical problem that the induced voltage on the power transmission line is inconvenient to test at the present stage.
Specifically, the device comprises a metal probe 1, a measuring rod 2, a grounding terminal 3, a meter connecting terminal 4, a universal meter 5 and an insulating rod 6; the metal probe 1 is positioned on the measuring rod 2 and is electrically connected with a voltage division type resistor 21 in the measuring rod 2; the grounding terminal 3 and the meter connecting terminal 4 are respectively positioned on the measuring rod 2 and are respectively electrically connected with the voltage-dividing resistor 21; the universal meter 5 is electrically connected with the meter connecting terminal 4; the insulating rod 6 is detachably and fixedly arranged below the measuring rod 2.
This application is visited piece 1 and by test line electric connection through the metal, ground terminal 3 and earth electric connection, connect table terminal 4 and 5 electric connection of universal meter, make by test line high voltage induced electricity transmit for current universal meter 5 through measuring excellent 2 partial pressure formula resistance 21, just can realize having measured the induced voltage of being surveyed the circuit, solve the induced voltage of current stage on to the transmission line and test inconvenient technical problem, this kind of transmission line induced voltage test stick can be simple, and is convenient, measure the induced voltage on the transmission line reliably, make the testing personnel can be directly perceived, conveniently know the size of induced voltage, thereby take corresponding safeguard procedures, the personal of testing personnel and test instrument's safety have been ensured.
Further, the metal probe 1 comprises a metal probe hook 11 and a probe 12; the probe 12 is positioned at the outer side edge of the metal probe hook 11; the structure can be touched by hands and can also be used for hanging a contact test part, so that the measurement is convenient.
Specifically, the metal probe 1 is an r-shaped metal structure.
Further, the voltage dividing resistor 21 includes an upper resistor 211 and a lower resistor 212; the upper resistor 211 and the lower resistor 212 are connected in series; the resistance value of the upper resistor 211 is much larger than that of the lower resistor 212; the multimeter 5 is electrically connected with two ends of the lower resistor 212 through the meter connecting terminal 4.
Further, the measuring rod 2 is a voltage-dividing resistor structure formed by connecting an upper resistor 211 and a lower resistor 212 in series, and the upper resistor 211 has a resistance value of
The lower resistor 212 has a resistance of
The partial pressure ratio is 1000: 1, choose bigThe resistance is intended to limit the current flow to excessive levels to prevent damage to multimeter 5.
Further, the ground terminal 3 is electrically connected to the ground.
Furthermore, the meter connecting terminal 4 is an aerial plug connector structure; the inner joint end of the aviation plug is respectively electrically connected with the lower resistor 212 and the grounding terminal 3, and the outside of the aviation plug is electrically connected with the measuring joint of the universal meter 5 through two led-out red and black wires.
Further, the insulating rod 6 is screwed to the measuring rod 2.
Specifically, the tail part of the insulating rod 6 is a handheld part, the outer surface of the top part of the insulating rod is provided with external threads, and the insulating rod and the bottom part of the measuring rod 2 can be connected together through threads.
The utility model discloses during the use, transmission line induced voltage test stick is used with current universal meter 5 cooperation, when needs measure transmission line induced voltage, put transmission line induced voltage test stick's metal and visit 1 and by test line electric connection, ground terminal 3 and ground electric connection, connect table terminal 4 and universal meter 5 electric connection, make by test line high voltage induced electricity through the partial pressure formula resistance structure of measurement stick 2, change low-voltage into, then transmit for current universal meter 5 through connecing 4 aviation plugs of table terminal, its voltage is measured to reuse universal meter 5's voltage shelves. In the measurement of the induced voltage of the power transmission line, the voltage measured by the multimeter 5 is the voltage at two ends of the resistor 212R2 under the measuring rod 2, and the voltage is as follows:
in the formula: u1 is the induced voltage on the transmission line, U2 is the voltage measured by multimeter 5, and R1 and R2 are the upper resistance 211 and the lower resistance 212 of the measuring bar 2, respectively.
Assuming the upper resistance 211 of the measuring stick 2
And a lower resistor 212
According to theoretical calculation, the induced voltage U1 on the transmission line is 1000U 2.
Therefore, the real induced voltage of the tested line is obtained by multiplying the measured voltage by 1000 by using the transmission line induced voltage test bar and the multimeter 5.
The application can simply, conveniently and reliably measure the induced voltage on the power transmission line, and helps a tester to visually and conveniently know the magnitude of the induced voltage, so that the corresponding protective measures can be taken in advance, and the personal safety of the tester and the safety of a testing instrument can be guaranteed. The device has the advantages of simple structure, convenient installation and operation, repeated utilization, economy, practicality, convenient carrying and management, flexible use, reasonable design, compact structure and suitability for wide popularization.
It should be noted that the detailed description of the present invention is not included in the prior art, or can be obtained directly from the market, and those skilled in the art can obtain the detailed description without creative efforts, and the detailed connection method has a very wide application in the field or daily life, and is not described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. The utility model provides a transmission line induced voltage testing arrangement which characterized in that: the device comprises a metal probe, a measuring rod, a grounding terminal, a meter connecting terminal, a multimeter and an insulating rod; the metal detection piece is positioned on the measuring rod and is electrically connected with the voltage division type resistor in the measuring rod; the grounding terminal and the meter connecting terminal are respectively positioned on the measuring rod and are respectively electrically connected with the voltage-dividing resistor; the universal meter is electrically connected with the meter connecting terminal; the insulating rod is detachably and fixedly arranged below the measuring rod.
2. The transmission line induced voltage testing arrangement of claim 1, characterized in that: the metal probe comprises a metal probe hook and a probe; the probe is positioned on the outer side edge of the metal probe hook.
3. The transmission line induced voltage testing arrangement of claim 1, characterized in that: the voltage division resistor comprises an upper resistor and a lower resistor; the upper resistor and the lower resistor are connected in series; the resistance value of the upper resistor is far larger than that of the lower resistor; the universal meter is electrically connected with the two ends of the lower resistor through the meter connecting terminals.
4. The transmission line induced voltage testing arrangement of claim 3, characterized in that: the upper resistance value is
The lower resistance value is
5. The transmission line induced voltage testing arrangement of claim 1, characterized in that: the grounding terminal is electrically connected with the ground.
6. The transmission line induced voltage testing arrangement of claim 3, characterized in that: the meter connecting terminal is an aerial plug connector structure.
7. The transmission line induced voltage testing arrangement of claim 6, characterized in that: the aerial plug connector is characterized in that the inner connector end of the aerial plug connector is electrically connected with the lower resistor and the grounding terminal respectively, and the outside of the aerial plug connector is electrically connected with the measuring connector of the universal meter through two led-out red and black wires.
8. The transmission line induced voltage testing arrangement of claim 1, characterized in that: the insulating rod is in threaded connection with the measuring rod.
9. The transmission line induced voltage testing arrangement of claim 1, characterized in that: the tail part of the insulating rod is a handheld part, and the outer surface of the top part of the insulating rod is provided with external threads which are connected with the bottom part of the measuring rod through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120300372.1U CN214310667U (en) | 2021-02-02 | 2021-02-02 | Transmission line induced voltage testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120300372.1U CN214310667U (en) | 2021-02-02 | 2021-02-02 | Transmission line induced voltage testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214310667U true CN214310667U (en) | 2021-09-28 |
Family
ID=77832758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120300372.1U Active CN214310667U (en) | 2021-02-02 | 2021-02-02 | Transmission line induced voltage testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214310667U (en) |
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2021
- 2021-02-02 CN CN202120300372.1U patent/CN214310667U/en active Active
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