CN203858265U - High-voltage connecting voltage-sharing ring for partial discharge tests or high-voltage insulation tests of power cable - Google Patents
High-voltage connecting voltage-sharing ring for partial discharge tests or high-voltage insulation tests of power cable Download PDFInfo
- Publication number
- CN203858265U CN203858265U CN201420157635.8U CN201420157635U CN203858265U CN 203858265 U CN203858265 U CN 203858265U CN 201420157635 U CN201420157635 U CN 201420157635U CN 203858265 U CN203858265 U CN 203858265U
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- China
- Prior art keywords
- voltage
- high pressure
- power cable
- cable
- tests
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000009413 insulation Methods 0.000 title claims abstract description 7
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims description 14
- 230000015556 catabolic process Effects 0.000 abstract 2
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract 2
- 239000004703 cross-linked polyethylene Substances 0.000 abstract 2
- 239000004698 Polyethylene Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012428 routine sampling Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to a high-voltage connecting voltage-sharing ring for partial discharge tests or high-voltage insulation tests of a power cable. The high-voltage connecting voltage-sharing ring is arranged below a voltage-sharing sleeve and has a double-layer structure, wherein the upper layer of the high-voltage connecting voltage-sharing ring is a circular ring body with the diameter being 40-400mm, and the lower layer is a circular ring body with the diameter being 40-600mm; and the upper end of the high-voltage connecting voltage-sharing ring is connected with a cable conductor connecting end, and the lower end of the high-voltage connecting voltage-sharing ring is provided with a high-voltage connector connected with a high-voltage cable. The field intensity of the end parts of a crosslinked polyethylene power cable or other power cables is centralized under the action of high voltage, and end part breakdown occurs easily; and especially, severe attenuation of partial discharge signals is caused easily because poor contact between a cable core of the crosslinked polyethylene power cable and a high-voltage lead, and the centralized end part field intensity causes electric discharge easily, thereby influencing the tests or flashover or breakdown or the like.
Description
Technical field
The utility model relates to power cable detection device, and the high pressure that particularly a kind of power cable shelf depreciation test or voltage-withstand test are used connects grading ring.
Background technology
According to cross-inked polyethylene power cable, power cable international standard and national standard requirement, cables manufacturing Shang He electric wire testing agency is to cross-inked polyethylene power cable, power cable dispatch from the factory routine test or sampling test, all will carry out voltage-withstand test, cross-inked polyethylene power cable also will carry out shelf depreciation test.
Cross-inked polyethylene power cable or other power cables are under action of high voltage, cable end field intensity is concentrated, end easily occurs to be punctured, especially cross-inked polyethylene power cable core contacts bad with high-voltage connection, easily cause that Partial discharge signal seriously decays, termination field intensity is concentrated and easily to be caused electric discharge, thereby affects test or flashover, puncture etc.
Utility model content
The purpose of this utility model is that the high pressure that provides a kind of power cable shelf depreciation test or voltage-withstand test to use connects grading ring, and it mainly solves the existing technical matters of above-mentioned prior art, and it makes test terminal easy for installation, quick.Cross-inked polyethylene power cable or other power cables are under action of high voltage, cable end field intensity is concentrated, end easily occurs to be punctured, especially cross-inked polyethylene power cable core contacts bad with high-voltage connection, easily cause that Partial discharge signal seriously decays, termination field intensity is concentrated and easily to be caused electric discharge, thereby affects test or flashover, puncture etc.
For solving the problems of the technologies described above, the utility model is achieved in that
The high pressure that the test of power cable shelf depreciation or voltage-withstand test are used connects a grading ring, it is characterized in that: described high pressure connects grading ring and is arranged on equal gland below and has double-decker; Its upper strata is the torus of diameter 120-400mm, and lower floor is the torus of diameter 120-600mm; Described high pressure connects grading ring upper end and is connected with cable conductor link, and the lower end that high pressure connects grading ring has high pressure connection to be connected with hi-line.
The high pressure that described power cable shelf depreciation test or voltage-withstand test are used connects grading ring, it is characterized in that: the core conductor that is fixed on cable insulation core between the levels of described high pressure connection grading ring with inner bolt.
The utility model is compared with existing conventional art, and tool has the following advantages:
1, the utility model is owing to adopting technique scheme, makes that test terminal is easy for installation, quick, material consumption is few, and reusable, evenly local field strength
2, to connect the upper strata of grading ring be the torus of diameter 120-400mm for high pressure of the present utility model, and lower floor is the torus of diameter 120-600mm, can guarantee to contact with cable core good time to avoid high pressure bloom phenomenon to occur.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that uses 35KV of the present utility model and following stress loop-oil sealing type cross-inked polyethylene power cable shelf depreciation test terminal.
Embodiment
Refer to Fig. 1, the utility model discloses the high pressure connection grading ring that a kind of power cable shelf depreciation test or voltage-withstand test are used.As shown in the figure: described high pressure connects grading ring 5 and is arranged on equal gland 3 belows and has double-decker; Its upper strata is the torus of diameter 120-400mm, and lower floor is the torus of diameter 120-600mm; Described high pressure connects grading ring 5 upper ends and is connected with cable conductor link 4, and the lower end that high pressure connects grading ring 5 has high pressure connection 7 to be connected with hi-line.
As preferably, between the levels of described high pressure connection grading ring 4, with inner bolt 6, be fixed on the core conductor of cable insulation core.
Below in conjunction with Fig. 2 and the utility model, the application in 35KV and following stress loop-oil sealing type cross-inked polyethylene power cable shelf depreciation test terminal is described in further detail the utility model.As shown in the figure: it comprises stress loop, all gland 3, high pressure connect grading ring 5; This stress loop is comprised of the interior ring 1 being threaded and 2 two metalworks of outer shroud; Screw 9 on interior ring 1 can make it be fixed on cable shield 8; Described equal gland 3 is enclosed within on cable insulation core, and all the semiconduction interface of gland 3 is connected with interior ring 1 lower end, and 2 of outer shrouds cover on outside connecting portion, all on gland 3, also has 5-16 full skirt 3; There is cable conductor link 4 lower end of described equal gland 3, and cable conductor link 4 is connected with the core conductor of cable insulation core; Described high pressure connects grading ring 5 upper ends and is connected with cable conductor link 4, and the lower end that high pressure connects grading ring 5 has high pressure connection 7 to be connected with hi-line, has inner bolt 6 that high pressure is connected to grading ring 5 and be connected with cable conductor link 4 on high pressure connection grading ring 5; In described equal gland 3, be sealed with high pressure resistant oil product.The upper strata that described high pressure connects grading ring 5 is the torus of diameter 120-400mm, and lower floor is the torus of diameter 120-600mm, can guarantee to contact with cable core good time to avoid high pressure bloom phenomenon to occur.
As preferably, the interior ring 1 band external thread of described stress loop, upper end is the torus of diameter 80-420mm; Described outer shroud 2 band internal threads, lower end is the torus of diameter 80-420mm; After inner and outer rings is fixing with screw thread, equal gland 3 geometrical clamps are located between the two, the height after inner and outer rings combination is 100-300mm.
As preferably, the full skirt 8 on described equal gland 3 is cone-shaped body.
As preferably, the height of described equal gland 2 is 0.45-0.80m, so both can meet testing requirements, can reduce again the stripping length at test cable two ends.
As preferably, the upper terminal inner lining silicon rubber semiconductor layer of described equal gland 2 is connected with stress loop 1 lower end.
As preferably, the two ends up and down of described equal gland 3 are connected respectively grading ring 5 sealings with high pressure by stress loop.
Be only preferred embodiment of the present utility model in sum, be not used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modify, all should be technology category of the present utility model.
Claims (2)
1. the high pressure that the test of power cable shelf depreciation or voltage-withstand test are used connects a grading ring, it is characterized in that: described high pressure connects grading ring (5) and is arranged on equal gland (3) below and has double-decker; Its upper strata is the torus of diameter 40-400mm, and lower floor is the torus of diameter 40-600mm; Described high pressure connects grading ring (5) upper end and is connected with cable conductor link (4), and the lower end that high pressure connects grading ring (5) has high pressure connection (7) to be connected with hi-line.
2. the high pressure that power cable shelf depreciation test according to claim 1 or voltage-withstand test are used connects grading ring, it is characterized in that: the core conductor that is fixed on cable insulation core between the levels of described high pressure connection grading ring (5) with inner bolt (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157635.8U CN203858265U (en) | 2014-04-02 | 2014-04-02 | High-voltage connecting voltage-sharing ring for partial discharge tests or high-voltage insulation tests of power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157635.8U CN203858265U (en) | 2014-04-02 | 2014-04-02 | High-voltage connecting voltage-sharing ring for partial discharge tests or high-voltage insulation tests of power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858265U true CN203858265U (en) | 2014-10-01 |
Family
ID=51608111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420157635.8U Expired - Lifetime CN203858265U (en) | 2014-04-02 | 2014-04-02 | High-voltage connecting voltage-sharing ring for partial discharge tests or high-voltage insulation tests of power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858265U (en) |
-
2014
- 2014-04-02 CN CN201420157635.8U patent/CN203858265U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |