CN211426614U - Line parameter induced voltage test bar - Google Patents
Line parameter induced voltage test bar Download PDFInfo
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- CN211426614U CN211426614U CN201921811241.9U CN201921811241U CN211426614U CN 211426614 U CN211426614 U CN 211426614U CN 201921811241 U CN201921811241 U CN 201921811241U CN 211426614 U CN211426614 U CN 211426614U
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- insulating cylinder
- resistor
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Abstract
The utility model relates to a line parameter induced voltage test bar, including insulating cylinder, mounting and handle, preceding, the back both ends of mounting are connected with insulating cylinder and handle respectively, the insulating cylinder front end is equipped with the metal contact spare that is used for the contact to be surveyed the circuit, be equipped with first resistance and second resistance in the insulating cylinder, first resistance front end and metal contact spare electric connection, rear end and second resistance electric connection, second resistance rear end connection shielded wire, the shielding layer ground connection of shielded wire, wire wherein are drawn forth and are connected the measurement interface from the mounting side, draw forth a wire between first resistance and the second resistance, also draw forth and connect the measurement interface from the mounting side to connect the measuring instrument. The test bar is beneficial to quickly, accurately and safely measuring the induction voltage of the maintenance line.
Description
Technical Field
The utility model relates to an overhaul line parameter and measure technical field, in particular to line parameter induced voltage test bar.
Background
The measurement of line parameter induced voltage is a necessary item for test, and for a line erected on the same tower, when two ends of the line are open, the induced voltage generated by the running line can be up to 20kV due to capacitance effect. If the induced voltage measurement is not carried out, certain danger can be caused to the personal safety of the testing personnel. Before line power frequency parameter testing, it is necessary to measure the induced voltage safely and effectively, firstly, provide guidance for personnel safety operation, and secondly, make a specific test scheme, thereby protecting the test instrument and personnel safety.
At present, acousto-optic electroscope is used at home and abroad to qualitatively detect whether equipment is electrified or not, but the specific value of the induced voltage of a power transmission line is not quantitatively detected, a universal meter is generally adopted to measure, but the universal meter has great potential safety hazard when the induced voltage is very high.
Disclosure of Invention
An object of the utility model is to provide a line parameter induced voltage test stick, this test stick is favorable to measuring the induced voltage who overhauls the circuit fast, accurately, safely.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a line parameter induction voltage test bar, its characterized in that, includes insulating cylinder, mounting and handle, the preceding, the back both ends of mounting are connected with insulating cylinder and handle respectively, the insulating cylinder front end is equipped with the metal contact spare that is used for contacting the circuit under test, be equipped with first resistance and second resistance in the insulating cylinder, first resistance front end and metal contact spare electric connection, rear end and second resistance electric connection, shielding line is connected to the second resistance rear end, the shielding layer ground connection of shielding line, the wire wherein is drawn forth and is connected the measurement interface from the mounting side, draw forth a wire between first resistance and the second resistance, also draw forth and connect the measurement interface from the mounting side to connect the measuring instrument.
Further, the first resistor is a high-voltage resistor, and the second resistor is a low-voltage resistor.
Further, the insulating cylinder is filled with filling materials.
Furthermore, first opening and second opening have been seted up to the mounting side, be equipped with the aviation plug on the mounting, the back is drawn forth from the insulating cylinder rear end to the shielded wire of connecting the second resistance rear end, and its shielding layer and wire and aviation connector electric connection, and the first opening is drawn forth from all the way of aviation connector connecting wire, connects and measures the interface, and the second opening is drawn forth from all the way of aviation connector connecting shielding layer, connects the ground terminal, the wire of drawing forth between first resistance and the second resistance is drawn forth the back from the insulating cylinder rear end, also wears out from first opening, connects and measures the interface.
Further, the measurement interface is connected with a multimeter.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides a can measure the induced voltage's of overhauing the circuit test stick fast, accurately, safely, overcome the drawback of conventional universal meter direct measurement induced voltage with the response, avoid because of the response is too strong, directly damage the instrument, cause bodily injury. When the line parameters are measured, a specific test scheme can be scientifically formulated according to the magnitude of the induction voltage, equipment and personal safety are protected, and reliability of measured data is improved. In addition, the test rod has the advantages of small appearance, convenience in carrying and operation, strong practicability and wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a line parameter induced voltage test bar, as shown in figure 1, comprising an insulating cylinder 3, a fixing part 8 and a handle 9, wherein the front end and the rear end of the fixing part 8 are respectively connected with the insulating cylinder 3 and the handle 9, the front end of the insulating cylinder 3 is provided with a metal contact element 1 for contacting a tested line, a first resistor 2 and a second resistor 5 are arranged in the insulating cylinder 3, the front end of the first resistor 2 is electrically connected with the metal contact element 1, the rear end is electrically connected with the second resistor 5, the rear end of the second resistor is connected with a shielding line, the shielding layer of the shielding line and the shell of the test bar are grounded together, the lead wire is led out from the side of the fixing part 8 and connected with a measurement interface 6, a lead wire is led out between the first resistor 2 and the second resistor 5, the side is also led out from the fixing part 8 and connected with the measurement interface 6 to connect with a measuring instrument and the, and measuring the induced voltage of the line in a voltage division mode.
In this embodiment, the first resistor is a high voltage resistor, the second resistor is a low voltage resistor, and the voltage division ratio is 1000: 1. And insulation filling materials 4 are filled in other spaces except the resistor and the lead in the insulation cylinder to prevent the resistor and the lead from moving and improve the insulation effect.
In this embodiment, first opening and second opening have been seted up to 8 sides of mounting, be equipped with the aviation plug on the mounting 8, the shielded wire of connecting 5 rear ends of low voltage resistance is drawn forth the back from 3 rear ends of insulating cylinder, and its shielding layer and wire and aviation connector electric connection, aviation connector connecting wire draw forth from first opening all the way, connect and measure interface 6, and aviation connector connecting shielding layer draws forth from the second opening all the way, connects ground terminal 7, the wire of drawing forth between 2 and the low voltage resistance 5 is drawn forth the back from 3 rear ends of insulating cylinder, also wears out from first opening, connects and measures interface 6.
The utility model discloses a maximum test voltage of induced voltage test bar can reach 20kV, and withstand voltage can bear 25kV for a short time, adopts pure resistance divider, impedance 100M omega, and the partial pressure is than 1000:1, and measurement accuracy 5%, can be adapted to the measurement of alternating current induced voltage and direct current charging voltage.
The working method of the utility model is as follows: first, it was confirmed that the outer case of the test bar and the shield layer of the shield wire were well grounded through the ground terminal. Then, the test rod is connected with a universal meter through a measurement interface. And then, holding the induced voltage test bar by hand, enabling the front-end metal contact piece to be firmly contacted with the tested circuit, reading the display value of the multimeter, and calculating the induced voltage according to the voltage division ratio.
Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.
Claims (5)
1. The utility model provides a line parameter induction voltage test bar, its characterized in that, includes insulating cylinder, mounting and handle, the preceding, the back both ends of mounting are connected with insulating cylinder and handle respectively, the insulating cylinder front end is equipped with the metal contact spare that is used for contacting the circuit under test, be equipped with first resistance and second resistance in the insulating cylinder, first resistance front end and metal contact spare electric connection, rear end and second resistance electric connection, shielding line is connected to the second resistance rear end, the shielding layer ground connection of shielding line, the wire wherein is drawn forth and is connected the measurement interface from the mounting side, draw forth a wire between first resistance and the second resistance, also draw forth and connect the measurement interface from the mounting side to connect the measuring instrument.
2. The line parameter induced voltage test bar of claim 1, wherein the first resistor is a high voltage resistor and the second resistor is a low voltage resistor.
3. The line parameter induction voltage test bar of claim 1, wherein the insulating cylinder is filled with a filling material.
4. The line parameter induction voltage test bar according to claim 1, wherein a first opening and a second opening are formed at a side of the fixing member, an aviation plug is arranged on the fixing member, after the shielding wire connected with the rear end of the second resistor is led out from the rear end of the insulating cylinder, the shielding layer and the wire of the shielding wire are electrically connected with the aviation connector, one path of the aviation connector connecting wire is led out from the first opening and connected with the measurement interface, one path of the aviation connector connecting shielding layer is led out from the second opening and connected with the ground terminal, and after the wire led out from the rear end of the insulating cylinder, the wire led out between the first resistor and the second resistor also penetrates out from the first opening and is connected with the measurement interface.
5. The line parameter induced voltage test bar of claim 1, wherein the measurement interface is connected to a multimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921811241.9U CN211426614U (en) | 2019-10-26 | 2019-10-26 | Line parameter induced voltage test bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921811241.9U CN211426614U (en) | 2019-10-26 | 2019-10-26 | Line parameter induced voltage test bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211426614U true CN211426614U (en) | 2020-09-04 |
Family
ID=72287397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921811241.9U Active CN211426614U (en) | 2019-10-26 | 2019-10-26 | Line parameter induced voltage test bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211426614U (en) |
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2019
- 2019-10-26 CN CN201921811241.9U patent/CN211426614U/en active Active
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