CN104931864B - A kind of pressure test insulating boot embedded suitable for cable position in storehouse - Google Patents
A kind of pressure test insulating boot embedded suitable for cable position in storehouse Download PDFInfo
- Publication number
- CN104931864B CN104931864B CN201510323586.XA CN201510323586A CN104931864B CN 104931864 B CN104931864 B CN 104931864B CN 201510323586 A CN201510323586 A CN 201510323586A CN 104931864 B CN104931864 B CN 104931864B
- Authority
- CN
- China
- Prior art keywords
- cable
- phase
- insulating boot
- pressure test
- pile crown
- Prior art date
- 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.)
- Active
Links
Landscapes
- Testing Relating To Insulation (AREA)
- Insulating Bodies (AREA)
Abstract
The present invention relates to a kind of pressure test insulating boot embedded suitable for cable position in storehouse, described insulating boot includes three phase-splitting insulation covers, each phase of threephase cable is correspondingly arranged a phase-splitting insulation cover, described phase-splitting insulation cover is columnar structured, umbrella skirt construction is provided with the outside of described phase-splitting insulation cover, to increase along face creep age distance, described phase-splitting insulation cover is directly socketed on hv cable termination pile crown, for when Voltage Cable Lines Construction carries out pressure test, cover cable termination pile crown, isolate cable termination pile crown and ground potential at the top of insulating boot, the high-voltage connection of pressure test is introduced in the inner side of each phase-splitting insulation cover, each phase-splitting insulation enclosure is connected on the cable termination pile crown of corresponding phase and carries out pressure test.During solving to carry out cable run pressure test in new transformer and distribution power station position in storehouse, to avoid inside cable terminal pile crown with surrounding ground potential apart from the problem of insufficient, the existing conventional method of use easily causes cable body to damage and produces pungent gas.
Description
Technical field
The present invention relates to power cable line, particularly high-tension cable pressure test, and in particular to one kind is applied to cable
The embedded pressure test insulating boot of position in storehouse.
Background technology
Power cable line is to transmit and distribute one of main element of electric energy in power network.In the power transformation that power circuit is intensive
Stand, the occasion such as switchyard, central station extensively using power cable line, play the irreplaceable important function of overhead line institute.State
The domestic 35kV and 10kV cable run (hereinafter referred to as " high-tension cables in Jiading district in Shanghai are administered by net Shanghai International Automobile City Tourist Festival electric company
Circuit ") operation management business.
Cable run pressure test is a job most conventional in cable run newly built construction, interruption maintenance, breakdown repair,
The transformer and distribution power station of earlier operation is open type position in storehouse, and cable termination pile crown is abundant with surrounding ground potential air distance after taking apart.
However, as transformer and distribution power station switch cubicle is closed and the development of miniaturization, its disengaging Voltage Cable Lines Construction position in storehouse is more compact, from
And cause cable run before newly built construction puts into operation, after interruption maintenance, after breakdown repair due to inside cable terminal pile crown and around
Ground potential is closer to the distance so that pressure test is difficult to the requirement for meeting real work.
To solve the above problems, traditional method is：
Method one, for the small bore cable (cross-section of cable≤120mm2), it is using the pliability of cable body, cable is whole
Pile crown is held to pull out position in storehouse, as shown in figure 1, so as to keep with surrounding ground potential certain distance to meet the requirement of pressure test.
This method has slight damage to cable body, and is difficult to again because cable displacement easily causes cable termination pile crown
On overlap joint.
Method two, for the electric cable with large cross-section (cross-section of cable >=240mm2), because cable body flexibility is stronger, can not copy
Method one is implemented, and typically separates cable termination pile crown and surrounding ground potential using insulated target.
For this method due to the dirty and insulation system on insulated target surface, surface leakage current is larger, easily causes pressure-resistant examination
Test that leakage current values are bigger than normal, can not correctly reflect the leakage current values of cable body, and when pressure test value is higher, can produce
Pungent gas.
The content of the invention
It is an object of the invention to provide a kind of pressure test insulating boot embedded suitable for cable position in storehouse, described insulation
Cover is arranged on cable termination pile crown, effectively separates cable termination pile crown and top ground potential, to solve to match somebody with somebody in new change
When cable run pressure test is carried out in the position in storehouse of power station, to avoid inside cable terminal pile crown and surrounding ground potential distance deficiency,
The problem of causing pressure test to be difficult to meet real work requirement, meanwhile, avoid because causing cable body to damage using conventional method
The problem of hindering and producing pungent gas.
To achieve the above object, the solution of the present invention is：A kind of pressure test insulation embedded suitable for cable position in storehouse
Cover, described insulating boot include three phase-splitting insulation covers, and each phase of threephase cable is correspondingly arranged a phase-splitting insulation cover, institute
The phase-splitting insulation cover stated is to be provided with umbrella skirt construction on the outside of columnar structured, described phase-splitting insulation cover, is climbed to increase along face
Electrical distance, described phase-splitting insulation cover are directly socketed on hv cable termination pile crown, resistance to for being carried out in Voltage Cable Lines Construction
During pressure experiment, cable termination pile crown, isolation cable termination pile crown and ground potential at the top of insulating boot are covered, in each phase-splitting insulation cover
Inner side introduce the high-voltage connection of pressure test, after high-voltage connection connects, each phase-splitting insulation enclosure is connected on corresponding phase
Pressure test is carried out on cable termination pile crown.
According to the pressure test insulating boot of the present invention embedded suitable for cable position in storehouse, the material of the insulating boot
For polytetrafluoroethylene (PTFE).
It is applied to the embedded pressure test insulating boot of cable position in storehouse according to of the present invention, the phase-splitting insulation cover
Top has insulating boot lid, and after each phase-splitting insulation enclosure enters cable termination pile crown, insulating boot is covered with insulating boot lid.
According to it is of the present invention suitable for cable position in storehouse embed pressure test insulating boot, 10kV high-tension cables it is exhausted
Hollow out length is at least 140mm~145mm inside edge cover, and internal hollow out diameter is at least 51mm~55mm, top insulation thickness
At least 10mm~12mm, avris insulation thickness are at least 8mm~10mm.
According to it is of the present invention suitable for cable position in storehouse embed pressure test insulating boot, 35kV high-tension cables it is exhausted
Hollow out length is at least 190mm~195mm inside edge cover, and internal hollow out diameter is at least 65mm~70mm, top insulation thickness
At least 12mm~14mm, avris insulation thickness are at least 10mm~12mm.
The beneficial effect that the present invention reaches：
(1) insulating boot of the invention is arranged on cable termination pile crown, effectively covers cable termination pile crown, and with top
Current potential keeps safe distance, when avoiding pressure test, inside cable terminal pile crown and surrounding ground potential distance deficiency, causes pressure-resistant
Experiment is difficult to meet real work requirement；
(2) insulating boot of the invention is simple in construction, is easy to carry, and after pressure test high-voltage connection is connected, directly
It is enclosed on cable termination pile crown, is convenient to mount and dismount quick.
(3) the socket part of insulating boot of the present invention and extension design umbrella group structure, and safe distance is effectively ensured；
(4) insulating boot of the invention uses polytetrafluoroethylmaterial material, and cost is low, alternating current breakdown intensity is high.
(5) size design of insulating boot of the present invention can meet the use of various O. cable terminal pile crowns, and not damage electricity
The silicon rubber insulation of cable terminal in itself.
Brief description of the drawings
Fig. 1 is the schematic view of the mounting position of insulating boot of the present invention；
Fig. 2 is the structural representation of insulating boot of the present invention.
In figure, 1 is umbrella skirt construction.
Embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
Present invention is generally directed to cable voltage experiment is carried out after Voltage Cable Lines Construction newly built construction, interruption maintenance, fault restoration
When, the cable termination pile crown and surrounding ground potential in compact cable position in storehouse are closer to the distance, cause that pressure-resistant examination can not be met
The problem of testing magnitude of voltage requirement, a kind of insulating boot for being used to cover cable termination pile crown of design.
As shown in figure 1, the insulating boot of the present invention is arranged at cable bin hv cable termination pile crown, in high-tension cable
When circuit carries out pressure test, cable termination pile crown is covered, it is kept safe enough distance with ground potential around, keeps away
Because of inside cable terminal pile crown and the deficiency of surrounding ground potential distance when exempting from pressure test so that pressure test is difficult to meet actual
The requirement of work.
As shown in Fig. 2 insulating boot of the present invention is cylindrical shape, described insulating boot includes three phase-splitting insulation covers,
Each phase of threephase cable is correspondingly arranged a phase-splitting insulation cover, described phase-splitting insulation cover be it is columnar structured, it is described
Umbrella skirt construction 1 is provided with the outside of phase-splitting insulation cover, it is described to increase along face creep age distance, the safe distance of guarantee test
Phase-splitting insulation cover is directly socketed on hv cable termination pile crown, for when Voltage Cable Lines Construction carries out pressure test, covering
Cable termination pile crown, isolation cable termination pile crown and ground potential at the top of insulating boot, are introduced resistance in the inner side of each phase-splitting insulation cover
The high-voltage connection of experiment is pressed, after high-voltage connection connects, each phase-splitting insulation enclosure is connected on to the cable termination pile crown of corresponding phase
Upper carry out pressure test.
When the insulating boot of the present invention is used for into pressure test, first, high-voltage connection is connected into height by the inner side of insulating boot
Voltage cable terminal pile crown, then three phase-splitting insulation covers are socketed in respectively on the cable termination pile crown of corresponding phase, started pressure-resistant
Experiment.The insulating boot of the present invention is applied to the form that cable position in storehouse embeds, i.e., transformation device extends downwardly from more at position in storehouse doorway
Situation.
Embodiment one：
The present embodiment one is directed to Voltage Cable Lines Construction 10kV normal cables, and its section is 70mm2, 120mm2,240mm2,
400mm2Four kinds, specific size is referring to table one.
The indoor 10KV cable terminations pile crown size table of the high-tension cable of table one
The present embodiment considers various O. cable terminal pile crowns and can be used and do not damage the silicon of cable termination in itself
Rubber-covered, the insulating boot inside hollow out length of 10kV high-tension cables is at least 140mm~145mm, to make cable termination pile crown
Insulating boot can be installed, the intended diameter of insulating boot should be slightly bigger than the width of full-size pile crown under same voltage class,
Hollow out diameter is at least 51mm~55mm inside the insulating boot of 10kV high-tension cables.Insulation thickness is at least 10mm at the top of insulating boot
~12mm, avris insulation thickness are at least 8mm~10mm, and this insulation thickness can meet the requirement of regulation pressure test value and leave
Abundant nargin.
When carrying out pressure test, high-voltage connection is drawn from inside cable terminal pile crown, it is desirable to the insulation division of insulating boot
Divide with the ability that can bear conventional withstanding voltage value, avoid cable termination pile crown from producing ground potential around and climb electricity or direct
Electric discharge phenomena.Conventional insulation materials during electrical industry is applied are from relative dielectric constant, alternating current breakdown intensity, machining property
Energy and four angles of economy are compared, and the present embodiment uses insulated part material of the polytetrafluoroethylmaterial material as insulating boot
Material, polytetrafluoroethylene (PTFE) meet machinability, and cost is low, and alternating current breakdown intensity is high.
When the insulating boot of the present invention is used for into pressure test, insulating boot is directly socketed on cable termination pile crown, by electricity
Cable terminal pile crown is isolated with ground potential at the top of insulating boot, keeps safe enough distance, experiment process is more safe and reliable, following table two
For test effect table：
The 10KV cables of table two insulating boot test effect table
For the insulating boot of the present embodiment in the case where providing pressure test magnitude of voltage, leakage current values are smaller, and no breakdown, nothing climb electricity, without hair
Phenomena such as hot, meet design requirement.
Embodiment two：
The present embodiment two differs only in the difference of design size compared with embodiment one, and 35kV normal cables section is
400mm2And 630mm2Two kinds, specific size is referring to table three.
The indoor 35KV cable terminations pile crown size table of the high-tension cable of table three
The present embodiment considers various O. cable terminal pile crowns and can be used and do not damage the silicon of cable termination in itself
Rubber-covered, the insulating boot inside hollow out length of 35kV high-tension cables is at least 190mm~195mm, to make cable termination pile crown
Insulating boot can be installed, the intended diameter of insulating boot should be slightly bigger than the width of full-size pile crown under same voltage class,
Hollow out diameter is at least 65mm~70mm inside the insulating boot of 35kV high-tension cables.Insulation thickness is at least 12mm at the top of insulating boot
~14mm, avris insulation thickness are at least 10mm~12mm, and this insulation thickness can meet the requirement of regulation pressure test value and stay
There is abundant nargin.Following table four is that 35KV high-voltage cable insulatings cover is used for test effect table：
The 35KV cables of table four insulating boot test effect table
For the insulating boot of the present embodiment in the case where providing pressure test magnitude of voltage, leakage current values are smaller, it is no breakdown, without climb electricity,
Phenomena such as without heating, meet design requirement.
10kV the and 35kV cable run pressure test insulating boots developed by the present invention, can be in compact cable position in storehouse
It is interior that pressure test is carried out to cable run, while the drawbacks of avoid conventional method.It is whole that the insulating boot of the present invention is arranged on cable
Pile crown is held, effectively covers cable termination pile crown, and safe distance is kept with ground potential around, it is indoor when avoiding pressure test
Cable termination pile crown and surrounding ground potential distance deficiency, cause pressure test to be difficult to meet real work requirement.Meanwhile the present invention
After pressure test high-voltage connection is connected, it is directly sleeved on cable termination pile crown, is convenient to mount and dismount quick.
Claims (5)
- A kind of 1. pressure test insulating boot embedded suitable for cable position in storehouse, it is characterised in that：Described insulating boot includes three Individual phase-splitting insulation cover, each phase of threephase cable are correspondingly arranged a phase-splitting insulation cover, and described phase-splitting insulation cover is cylinder Shape structure, described phase-splitting insulation cover outside is provided with umbrella skirt construction, to increase along face creep age distance, described phase-splitting insulation Cover is directly socketed on hv cable termination pile crown, for when Voltage Cable Lines Construction carries out pressure test, covering cable termination Pile crown, isolation cable termination pile crown and ground potential at the top of insulating boot, pressure test is introduced in the inner side of each phase-splitting insulation cover High-voltage connection, after high-voltage connection connects, each phase-splitting insulation enclosure is connected on the cable termination pile crown of corresponding phase carry out it is resistance to Pressure experiment.
- 2. the pressure test insulating boot according to claim 1 embedded suitable for cable position in storehouse, it is characterised in that described The material of insulating boot is polytetrafluoroethylene (PTFE).
- 3. the pressure test insulating boot according to claim 1 embedded suitable for cable position in storehouse, it is characterised in that described The top of phase-splitting insulation cover has insulating boot lid, after each phase-splitting insulation enclosure enters cable termination pile crown, is covered with insulating boot lid Insulating boot.
- 4. the pressure test insulating boot according to claim 1 embedded suitable for cable position in storehouse, it is characterised in that 10kV Hollow out length is at least 140mm~145mm inside the insulating boot of high-tension cable, and internal hollow out diameter is at least 51mm~55mm, Top insulation thickness is at least 10mm~12mm, and avris insulation thickness is at least 8mm~10mm.
- 5. the pressure test insulating boot according to claim 1 embedded suitable for cable position in storehouse, it is characterised in that 35kV Hollow out length is at least 190mm~195mm inside the insulating boot of high-tension cable, and internal hollow out diameter is at least 65mm~70mm, Top insulation thickness is at least 12mm~14mm, and avris insulation thickness is at least 10mm~12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323586.XA CN104931864B (en) | 2015-06-12 | 2015-06-12 | A kind of pressure test insulating boot embedded suitable for cable position in storehouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510323586.XA CN104931864B (en) | 2015-06-12 | 2015-06-12 | A kind of pressure test insulating boot embedded suitable for cable position in storehouse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104931864A CN104931864A (en) | 2015-09-23 |
| CN104931864B true CN104931864B (en) | 2018-03-30 |
Family
ID=54119121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510323586.XA Active CN104931864B (en) | 2015-06-12 | 2015-06-12 | A kind of pressure test insulating boot embedded suitable for cable position in storehouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104931864B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843749A (en) * | 2017-12-11 | 2018-03-27 | 冯志仑 | Insulation protection device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174766A (en) * | 2006-10-30 | 2008-05-07 | 深圳市长园新材料股份有限公司 | Outdoor terminal of crosslinked electric cable compound insulation sleeve |
| CN201813136U (en) * | 2010-10-14 | 2011-04-27 | 柏兰电工有限公司 | High-voltage cable terminal for high-speed train |
| CN201945604U (en) * | 2010-11-28 | 2011-08-24 | 李琛 | Insulating hood for cable alternating current and withstand voltage test |
| CN102353879A (en) * | 2011-07-06 | 2012-02-15 | 浙江晨光电缆股份有限公司 | Cable partial discharge test terminal |
| CN203054161U (en) * | 2012-12-10 | 2013-07-10 | 国家电网公司 | Protection device for cable withstand voltage test |
| CN103809085A (en) * | 2012-11-15 | 2014-05-21 | 国家电网公司 | Junction device for cable high-voltage resistance test and cable high-voltage resistance test |
| CN203858327U (en) * | 2014-04-02 | 2014-10-01 | 上海华普电缆有限公司 | Terminal for testing partial discharge of 35kV or lower crosslinked polyethylene power cable |
| CN203894285U (en) * | 2014-06-18 | 2014-10-22 | 国网上海市电力公司 | Auxiliary electrode for DC withstand voltage test of plug-in elbow-shaped cable terminal |
| CN203910298U (en) * | 2014-05-07 | 2014-10-29 | 国家电网公司 | Cable-type column switch cable silica gel umbrella skirt |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101238141B1 (en) * | 2011-11-15 | 2013-02-28 | 대한전선 주식회사 | Electric test device of epoxy insulator for joint box of ultar high voltage power cable |
-
2015
- 2015-06-12 CN CN201510323586.XA patent/CN104931864B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174766A (en) * | 2006-10-30 | 2008-05-07 | 深圳市长园新材料股份有限公司 | Outdoor terminal of crosslinked electric cable compound insulation sleeve |
| CN201813136U (en) * | 2010-10-14 | 2011-04-27 | 柏兰电工有限公司 | High-voltage cable terminal for high-speed train |
| CN201945604U (en) * | 2010-11-28 | 2011-08-24 | 李琛 | Insulating hood for cable alternating current and withstand voltage test |
| CN102353879A (en) * | 2011-07-06 | 2012-02-15 | 浙江晨光电缆股份有限公司 | Cable partial discharge test terminal |
| CN103809085A (en) * | 2012-11-15 | 2014-05-21 | 国家电网公司 | Junction device for cable high-voltage resistance test and cable high-voltage resistance test |
| CN203054161U (en) * | 2012-12-10 | 2013-07-10 | 国家电网公司 | Protection device for cable withstand voltage test |
| CN203858327U (en) * | 2014-04-02 | 2014-10-01 | 上海华普电缆有限公司 | Terminal for testing partial discharge of 35kV or lower crosslinked polyethylene power cable |
| CN203910298U (en) * | 2014-05-07 | 2014-10-29 | 国家电网公司 | Cable-type column switch cable silica gel umbrella skirt |
| CN203894285U (en) * | 2014-06-18 | 2014-10-22 | 国网上海市电力公司 | Auxiliary electrode for DC withstand voltage test of plug-in elbow-shaped cable terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104931864A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105606850B (en) | High voltage direct current supporting insulator experimental rig, pilot system and test method | |
| CN106469594B (en) | Bushing shell for transformer | |
| CN105743053B (en) | A kind of capacitance type cable terminal being not filled with dielectric | |
| CN104931864B (en) | A kind of pressure test insulating boot embedded suitable for cable position in storehouse | |
| CN104931865B (en) | A kind of Voltage Cable Lines Construction pressure test insulating boot and test method | |
| CN208796801U (en) | A kind of insulation filling type capacitance type transformer sleeve | |
| CN110828112B (en) | Outdoor totally-enclosed composite insulation three-phase combined transformer | |
| WO2011100883A1 (en) | High voltage terminal | |
| Luo et al. | Influence of pin corrosion on mechanical characteristic of UHVDC disc suspension insulators and solutions | |
| CN203589642U (en) | High-voltage conductor dry-type insulating bush | |
| CN105743075B (en) | The single-phase arc grounding analogue means of power distribution network | |
| CN203519814U (en) | Multipurpose junction box for secondary voltage drop test line | |
| CN205692974U (en) | Allocated radio bridge joint ground wire insulation earthing device | |
| CN105846335B (en) | A kind of 12kV current-carrying 1250A solid insulation switch cabinets | |
| CN105428135B (en) | Disconnecting switch | |
| CN206505107U (en) | Voltage x current is double to apply power-supply system | |
| CN213337791U (en) | 10kV rain and snow type high-voltage acousto-optic electroscope | |
| CN209387706U (en) | High-tension cable pressure test insulating boot and insulated connecting device | |
| CN201674149U (en) | Inflatable ring network switch cabinet | |
| CN207097650U (en) | Oil immersed type combination transformer | |
| CN205691644U (en) | 500kV coaxial equivalent potential screen structure capacitive divider | |
| Jing et al. | Characteristics of Circulating Current in Main Feeding Cable armor of Common Ground Electrode | |
| CN206506218U (en) | A kind of outlet casing tube | |
| CN109119956A (en) | A kind of insulation filling type capacitive type wall bushing | |
| CN209415755U (en) | Portable mutual inductor heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |