CN211122944U - Special adapter for GIS cable terminal test - Google Patents
Special adapter for GIS cable terminal test Download PDFInfo
- Publication number
- CN211122944U CN211122944U CN201921719803.7U CN201921719803U CN211122944U CN 211122944 U CN211122944 U CN 211122944U CN 201921719803 U CN201921719803 U CN 201921719803U CN 211122944 U CN211122944 U CN 211122944U
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- gis
- grounding
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- voltage test
- test
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- 238000012360 testing method Methods 0.000 title claims abstract description 66
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 206010014357 Electric shock Diseases 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The utility model relates to a special crossover sub of GIS cable termination test, including high-voltage testing lead wire and reducing lead screw, the both ends of high-voltage testing lead wire are GIS end and vehicle end respectively, at GIS end threaded connection reducing lead screw, the screw hole of reducing lead screw one end diameter and high-voltage testing lead wire GIS end match, the bolt hole of reducing lead screw other end diameter and GIS ground connection switch earthing terminal matches. The device can greatly improve the test efficiency and improve the accuracy of fault location.
Description
Technical Field
The utility model belongs to the technical field of the high voltage test, a GIS cable terminal test technique, especially a GIS cable terminal test special crossover sub are related to 110kV and above.
Background
The high-voltage power cable fault finding test is a diagnosis test item which is the first choice after the fault trip of a cable line, and has important significance for finding that the internal insulation of the main insulation of the cable is affected with damp and aged, serious partial discharge breakdown exists, finding the position of a fault point quickly and accurately and the like.
When a fault finding test is carried out on a full-cable transmission line with GIS incoming lines at both side station ends, a grounding disconnecting link of a station end line at one side needs to be pulled open; and because the test end can not connect the high-voltage test lead on the cable terminal head in the GIS air chamber directly, so need pull down the grounding row of GIS circuit grounding switch static contact, then utilize the bolt to insert the high-voltage test lead and close into with the help of circuit grounding switch and then carry out the pressurization test to the tested cable, because the test voltage is higher (generally about 30 kV-70 kV), and the full cable line is the capacitive, this has just led to following several problems:
1. the fault cable is a high-resistance fault cable line with a far fault point, and when the grounding bar is disassembled, residual charges in the cable are easy to cause personal electric shock accidents; or the risk of induction electric shock can be caused by a worker disconnecting the grounding bar and connecting the grounding bar into the high-voltage lead when the cable line is in live-line operation with the same groove as the fault cable;
2. the GIS grounding disconnecting link static contact grounding leading-out terminal and the ground potential can not ensure enough safety distance (the bolt of the static contact grounding leading-out terminal is short and the high-voltage test clamp has a large opening without insulation) and the test can be carried out only by repeatedly adjusting the contact position of the high-voltage test clamp and the bolt and assisting multiple insulation. Even if the fault reflection waveform is extremely unsatisfactory because the bolt cannot be connected with the static contact of the grounding disconnecting link, the accurate judgment of a fault point is seriously influenced;
3. the high-voltage test clamp is clamped on a short bolt, and an insulating tape wound on the test clamp is not compact, so that casualties and equipment damage are easily caused if a high-voltage lead falls off in the high-voltage test process; therefore, it is important to ensure the reliable connection between the high-voltage lead and the static contact bolt of the grounding switch.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide a GIS cable terminal test special crossover sub, solve the problem that exists in 110kV and above two side GIS cable terminal's full cable line trouble-shooting test process.
The utility model provides a technical scheme that technical problem adopted is:
the utility model provides a special crossover sub of GIS cable termination test, includes high-voltage testing lead wire and reducing lead screw, the both ends of high-voltage testing lead wire are GIS end and vehicle end respectively, at GIS end threaded connection reducing lead screw, reducing lead screw one end diameter and the screw hole of high-voltage testing lead wire GIS end match, reducing lead screw other end diameter matches with the bolt hole of GIS ground connection switch earthing terminal.
And one high-voltage test lead is matched with a plurality of reducing screw rods, the diameters of the ends of the plurality of reducing screw rods, which are connected with the GIS end of the high-voltage test lead, are the same, and the diameters of the ends, which are connected with the grounding end of the GIS grounding switch, are different.
And two ends of the high-voltage test lead are respectively wrapped by the high-voltage insulating sleeves.
And the diameter of the end of the reducing screw rod connected with the grounding end of the GIS grounding disconnecting link is 12-16 mm, and the diameter of the end of the reducing screw rod connected with the GIS end of the high-voltage test lead is 8.7 mm.
The utility model has the advantages that:
1. the power failure time is reduced, and the power supply reliability is improved. When in field test, the high-voltage test clamp is clamped on a short bolt, and the insulating tape wound on the test clamp is not compact, so that casualties and equipment damage are easily caused if a high-voltage lead falls off in the high-voltage test process; the time for dismounting the grounding end and adjusting the position of the test clamp to wind, insulate and fix is 1-2 hours, and the single test time of the adapter is shortened to 0.5 hour;
2. the safety risk is reduced, and the intrinsic safety is strengthened. An operator holds the adapter with the insulating sheath to operate, so that the risks of high voltage electric shock and the like are avoided;
3. the working efficiency and the positioning accuracy are improved. The device can greatly improve the test efficiency and improve the accuracy of fault location.
Drawings
FIG. 1 is a block diagram of the present adapter;
fig. 2 is a structural diagram of the variable diameter screw rod.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.
A special adapter for GIS cable terminal tests comprises a high-voltage test lead 3 and a plurality of reducing screw rods 5, wherein a GIS end 4 and a vehicle end 2 are respectively arranged at two ends of the high-voltage test lead, the GIS end is connected with a reducing screw rod in a threaded manner, the diameter of one end of the reducing screw rod is matched with a threaded hole at the GIS end of a high-voltage test lead, the diameter of the other end of the reducing screw rod is matched with a bolt hole at the grounding end 6 of the GIS grounding switch, when in use, different reducing screw rods are selected according to the size of the bolt hole at the grounding end of the GIS grounding disconnecting link, then one end of the reducing screw rod is screwed into the GIS end of the adapter of the high-voltage test lead, the other end of the reducing screw rod is screwed into a bolt hole of the grounding end of the GIS grounding switch, and finally the vehicle end of the high-voltage test lead is connected with the high-voltage lead end 1 of the test vehicle, therefore, safe, reliable and quick electrical connection is realized, and conditions are created for quick searching of cable fault points.
The outside of the adapter is wrapped by a high-voltage insulating sleeve, so that the safety distance between the adapter and the grounding terminal is ensured in the test process, and the electric shock risk of a human body can be effectively prevented when the adapter is connected into a GIS grounding switch;
the butt joint mode is adopted to firmly connect the adapter and the high-voltage lead of the test vehicle, the installation and the disassembly are very convenient, the high-voltage lead can not fall off in the test process, and meanwhile, a large amount of test time is saved.
The invention improves the efficiency of the test to a great extent and saves the test time, thereby ensuring that the tested equipment is put into operation on time, reducing the power failure time and saving a great deal of funds for the company.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the spirit of the present invention, and these modifications and improvements are all within the protection scope of the present invention.
Claims (4)
1. The utility model provides a GIS cable termination tests special crossover sub which characterized in that: the high-voltage test device comprises a high-voltage test lead and a reducing screw rod, wherein a GIS end and a vehicle end are respectively arranged at two ends of the high-voltage test lead, the reducing screw rod is in threaded connection with the GIS end, one end of the reducing screw rod is matched with a threaded hole at the GIS end of the high-voltage test lead, and the other end of the reducing screw rod is matched with a bolt hole at the grounding end of a GIS grounding switch.
2. The adapter special for the GIS cable termination test according to claim 1, characterized in that: a high-voltage test lead wire matches a plurality of reducing lead screws, the diameter of the end head connected with the GIS end of the high-voltage test lead wire is the same, and the diameter of the end head connected with the grounding end of the GIS grounding switch is different.
3. The adapter special for the GIS cable termination test according to claim 1, characterized in that: two ends of the high-voltage test lead are respectively wrapped by the high-voltage insulating sleeves.
4. The GIS cable termination test dedicated adapter connector of claim 1 or 2, characterized in that: the diameter of the end of the reducing screw rod connected with the grounding end of the GIS grounding disconnecting link is 12-16 mm, and the diameter of the end of the reducing screw rod connected with the GIS end of the high-voltage test lead is 8.7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719803.7U CN211122944U (en) | 2019-10-15 | 2019-10-15 | Special adapter for GIS cable terminal test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719803.7U CN211122944U (en) | 2019-10-15 | 2019-10-15 | Special adapter for GIS cable terminal test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211122944U true CN211122944U (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921719803.7U Active CN211122944U (en) | 2019-10-15 | 2019-10-15 | Special adapter for GIS cable terminal test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211122944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672886A (en) * | 2019-10-15 | 2020-01-10 | 国网天津市电力公司 | Adapter for GIS cable terminal test |
-
2019
- 2019-10-15 CN CN201921719803.7U patent/CN211122944U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672886A (en) * | 2019-10-15 | 2020-01-10 | 国网天津市电力公司 | Adapter for GIS cable terminal test |
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