CN212255419U - Wire for testing grounding impedance of transformer substation grounding grid - Google Patents
Wire for testing grounding impedance of transformer substation grounding grid Download PDFInfo
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- CN212255419U CN212255419U CN202020564904.8U CN202020564904U CN212255419U CN 212255419 U CN212255419 U CN 212255419U CN 202020564904 U CN202020564904 U CN 202020564904U CN 212255419 U CN212255419 U CN 212255419U
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- wire core
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- insulating layer
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- transformer substation
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Abstract
The utility model discloses a test transformer substation's ground net wire for ground impedance has solved the problem that consuming time hard and test wire use amount is big that exists when the ground net ground impedance test of transformer substation. Including current test wire core (2) and voltage test wire core (5), the cladding has first insulating layer (3) on current test wire core (2), the cladding has shielding layer (1) on first insulating layer (3), the cladding has second insulating layer (4) on shielding layer (1), be provided with voltage test wire core (5) in second insulating layer (4), voltage test wire core (5) and current test wire core (2) are parallel arrangement each other. Adopt the utility model discloses a when the wire carries out the impedance test of transformer substation, can reduce staff's work load to shorten the time of staff's wiring, shorten test time, improve work efficiency.
Description
Technical Field
The utility model relates to a wire that test impedance used, wire that uses when in particular to test transformer substation's earth mat ground connection impedance.
Background
At present, when the grounding impedance of a ground grid of a large-scale power plant or a transformer substation is tested, a voltage ammeter method with higher accuracy is adopted; during testing, a test lead is required to be respectively connected with a voltage pole and a current pole outside a power plant or a transformer substation, and because the wiring position of the test electrode is far away from the wiring position of a test meter and the distance between the magnetic field of the current test lead and the voltage test magnetic field is required to be about 1 meter away to prevent mutual interference between the magnetic field of the current test lead and the voltage test magnetic field, the problems of long time consumption and large workload of wiring and wire collection exist during field testing; for example: for example, in a 1000kV substation, a current line of 2000 meters and a voltage line of 1300 meters generally need to be arranged in parallel by using a 33-coil wire of 100 meters, which is a problem to be solved urgently in a field test, because the field wiring takes too long time and the working strength of an operator is high, how to reduce the workload of arranging test wires.
Disclosure of Invention
The utility model provides a test transformer substation's ground net wire for ground impedance has solved the technical problem that the consuming time is hard and the test wire use amount is big that exists when the test of transformer substation's ground net ground impedance.
The utility model discloses a solve above technical problem through following technical scheme:
the utility model provides a test transformer substation's ground net wire for ground connection impedance, includes current test wire core and voltage test wire core, has the first insulation layer in the cladding on current test wire core, has the shielding layer in the cladding on the first insulation layer, has the second insulating layer in the cladding on the shielding layer, is provided with voltage test wire core in the second insulating layer, and voltage test wire core and current test wire core are parallel arrangement each other.
And the second insulating layer is coated with a wear-resistant protective layer.
Adopt the utility model discloses a when the wire carries out the impedance test of transformer substation, can reduce staff's work load to shorten the time of staff's wiring, shorten test time, improve work efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
the utility model provides a test transformer substation's ground net wire for ground impedance, includes current test wire core 2 and voltage test wire core 5, has the first insulating layer 3 in the cladding on current test wire core 2, has shielding layer 1 in the cladding on first insulating layer 3, has second insulating layer 4 in the cladding on shielding layer 1, is provided with voltage test wire core 5 in second insulating layer 4, and voltage test wire core 5 and current test wire core 2 are parallel arrangement each other.
The second insulating layer 4 is coated with a wear-resistant protective layer 6.
Current test wire core 2 is formed for many copper wires transposition, voltage test wire core 5 is formed for single copper wire or many copper wires transposition, the material of second insulating layer 4 is polyvinyl chloride, current test wire core 2 and voltage test wire core 5 all set up in second insulating layer 4, be provided with the shielding layer 1 that is used for keeping apart the magnetic field that current test wire core 2 produced between current test wire core 2 and voltage test wire core 5, guarantee that the magnetic field that is used for measuring current's current test wire core 2 to form does not influence voltage test wire core 5 measuring voltage. Shielding layer 1 is the network structure that the copper wire was woven in this embodiment, the utility model discloses replaced two conventional wires with a wire, can reduce staff's work load to shorten the time of staff's wiring, shorten test time, improve work efficiency. In this embodiment, the first insulating layer 3 is made of polyvinyl chloride, the first insulating layer 3 is located between the shielding layer 1 and the current testing wire core 2, the current testing wire core 2 is disposed in the first insulating layer 3, the first insulating layer 3 is disposed in the second insulating layer 4, and the shielding layer 1 is disposed outside the first insulating layer 3, and is configured to isolate a magnetic field generated by the current testing wire core 2 in the first insulating layer 3, so as to prevent the magnetic field formed by the current testing wire core 2 from affecting the voltage measurement of the voltage testing wire core 5; in this embodiment, a wear-resistant protection layer 6 is disposed outside the second insulation layer 4, the wear-resistant protection layer 6 is made of a polyester film, and the life of the test lead can be prolonged by the wear-resistant layer. When the grounding impedance test wire of the grounding grid is used for wiring and winding up, only the wire in the embodiment needs to be arranged, so that the work amount is reduced greatly, the working efficiency is improved, and the test time is shortened.
Claims (2)
1. The utility model provides a test transformer substation's ground net wire for ground impedance, including current test wire core (2) and voltage test wire core (5), a serial communication port, the cladding has first insulating layer (3) on current test wire core (2), the cladding has shielding layer (1) on first insulating layer (3), the cladding has second insulating layer (4) on shielding layer (1), be provided with voltage test wire core (5) in second insulating layer (4), voltage test wire core (5) and current test wire core (2) are parallel arrangement each other.
2. The lead for testing the grounding impedance of a substation grounding grid according to claim 1, characterized in that the second insulating layer (4) is coated with a wear-resistant protective layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020564904.8U CN212255419U (en) | 2020-04-16 | 2020-04-16 | Wire for testing grounding impedance of transformer substation grounding grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020564904.8U CN212255419U (en) | 2020-04-16 | 2020-04-16 | Wire for testing grounding impedance of transformer substation grounding grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212255419U true CN212255419U (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020564904.8U Active CN212255419U (en) | 2020-04-16 | 2020-04-16 | Wire for testing grounding impedance of transformer substation grounding grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212255419U (en) |
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2020
- 2020-04-16 CN CN202020564904.8U patent/CN212255419U/en active Active
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