CN107332195A - A kind of high voltage direct current cable outdoor terminal - Google Patents
A kind of high voltage direct current cable outdoor terminal Download PDFInfo
- Publication number
- CN107332195A CN107332195A CN201710631345.0A CN201710631345A CN107332195A CN 107332195 A CN107332195 A CN 107332195A CN 201710631345 A CN201710631345 A CN 201710631345A CN 107332195 A CN107332195 A CN 107332195A
- Authority
- CN
- China
- Prior art keywords
- eduction rod
- gold utensil
- direct current
- high voltage
- conductor
- 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.)
- Withdrawn
Links
- 239000004020 conductor Substances 0.000 claims abstract description 57
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000010931 gold Substances 0.000 claims abstract description 31
- 229910052737 gold Inorganic materials 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 31
- 239000000945 filler Substances 0.000 claims abstract description 21
- 238000010292 electrical insulation Methods 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 230000035882 stress Effects 0.000 abstract description 36
- 238000004643 material aging Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000005684 electric field Effects 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/04—Cable-end sealings
- H02G15/043—Cable-end sealings with end caps, e.g. sleeve closed at one end
- H02G15/046—Cable-end sealings with end caps, e.g. sleeve closed at one end with bores or protruding portions allowing passage of cable conductors
Landscapes
- Cable Accessories (AREA)
Abstract
The present invention relates to a kind of high voltage direct current cable outdoor terminal, including top gold utensil, insulating sleeve, bottom gold utensil, insulation filling agent, cable, bottom conductor eduction rod, connect conductor, upper conductor eduction rod, stress cone, insulating sleeve, top gold utensil, bottom gold utensil formation sealed chamber one, it is interior to be filled with insulation filling agent, the inner bottom part of sealed chamber one is provided with closed chamber two, connect the top that conductor lower surface connects closed chamber two by bottom conductor eduction rod, bottom conductor eduction rod is extended in closed chamber two, connection conductor upper surface is connected with upper conductor eduction rod, upper conductor eduction rod is through top gold utensil and stretches out；Cable is extended in closed chamber two through bottom gold utensil, connects bottom conductor eduction rod, and cable is being set with stress cone close to the part of bottom conductor eduction rod.Stress cone is arranged in closed chamber two, be effectively isolated the contact of stress cone and insulation filling agent, it is to avoid the stress cone material aging that contact is caused, and realizes longtime running, and stability is high.
Description
Technical field
The present invention relates to a kind of high voltage direct current cable outdoor terminal, belong to high voltage DC power systems technology field.
Background technology
The secondary energy sources aboundresources such as China's wind energy, solar energy, tide energy, and the best transmission of this kind of Energy output electric energy
Mode be exactly using flexible high pressure direct current transportation because not only transmission capacity is 2 times of ac cable to high voltage direct current cable, and
Electric energy loss of transmitting electricity is only the 40% of ac cable, therefore transmission distance can be lengthened significantly.Outdoor terminal is in electric line
End, be important connector.It plays improvement direct current cables end Electric Field Distribution, connection cable and other power transmission and transforming equipments
Important function.
At present, China's input immense strength exploitation high voltage direct current cable, China's direct current cables manufacturing technology has been obtained rapidly
Development, but the development of the direct current cables outdoor terminal of direct current cables annex especially large usage quantity relatively lags behind, and seriously restricts
The development of China's high voltage direct current Force system.Existing high voltage direct current cable outdoor terminal has more deficiency, for example, should
Power cone typically uses quality of rubber materials, and insulation filling agent is generally silicone oil or polyisobutylene oil, and stress cone immerses insulation filling for a long time
In agent, the stress cone material aging easily caused reduces electric property, and longtime running easily causes insulation breakdown, there is safety hidden
Suffer from；Structure design existing defects, exterior insulation sleeve pipe electric-field intensity is larger, easily produces filthy build up and causes pollution flashover even
Puncture, sealing is poor, influence the safe operation of cable system.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of high voltage direct current cable outdoor terminal；
Present invention, avoiding infiltration of the rubber stress cone in insulation filling agent, longtime running stability is high；Exterior insulation
Sleeve pipe electric-field intensity is smaller, good airproof performance, is conducive to cable system safe operation.
The technical scheme is that：
A kind of high voltage direct current cable outdoor terminal, including top gold utensil, insulating sleeve, bottom gold utensil, insulation filling agent, electricity
Cable, bottom conductor eduction rod, connection conductor, upper conductor eduction rod, stress cone, upper surface, the lower surface of the insulating sleeve
It is connected respectively with the top gold utensil lower surface, the bottom gold utensil upper surface, forms sealed chamber one, the sealed chamber one
Interior to be filled with the insulation filling agent, the inner bottom part of sealed chamber one is provided with closed chamber two, and the connection conductor is arranged at close
Seal in chamber one, the connection conductor lower surface connects the top of the closed chamber two, institute by the bottom conductor eduction rod
State bottom conductor eduction rod to extend in the closed chamber two, the connection conductor upper surface connects with the upper conductor eduction rod
Connect, the upper conductor eduction rod is through top gold utensil and stretches out；The cable extends to described close through the bottom gold utensil
Seal in room two, connect the bottom conductor eduction rod, the cable is set with the part close to the bottom conductor eduction rod
Stress cone.
The advantage designed herein is that stress cone is arranged in closed chamber two, has been effectively isolated stress cone and insulation filling
The direct contact of agent, it is to avoid stress cone contacts the stress cone material aging caused with insulation filling agent for a long time, can be achieved long-term
Operation, and stability is high.
According to currently preferred, the closed chamber two includes built-in electrical insulation sleeve, connecting seat, and the connecting seat is hollow
Tubular structure, the upper surface of the built-in electrical insulation sleeve connects the connection conductor by the bottom conductor eduction rod, described
The lower surface of built-in electrical insulation sleeve connects the upper surface of the connecting seat, and the lower surface of the connecting seat connects the bottom gold
Internal shield electrode is provided with tool, the built-in electrical insulation sleeve.
The advantage designed herein is that the internal shield electrode that built-in electrical insulation sleeve inner is set, homogenizing closes on position electricity
Field distribution so that stress cone, built-in electrical insulation sleeve, insulation filling agent, insulating sleeve electric-field intensity are uniformly distributed, and reduce insulation
Sleeve surface electric-field intensity, so as to reduce the probability of insulating sleeve surface filth accumulation, it is to avoid pollution flashover punctures
Produce.
According to currently preferred, the surface of the internal shield electrode is provided with insulating blanket.
The advantage designed herein is that insulating blanket excellent insulating property, compact structure is high, not with insulation filling agent phase
Infiltration, long-term operation performance is stable.
According to currently preferred, the insulating blanket is epoxy resin or insulating paper.
According to currently preferred, the high voltage direct current cable outdoor terminal also includes tail pipe, compression set, the stress
Bore bottom and be provided with compression set, the bottom gold utensil bottom connects the tail pipe, the built-in electrical insulation sleeve, the connecting seat,
The tail pipe forms the closed chamber two, and the cable enters the closed chamber two through the tail pipe.
The advantage designed herein is, is applied on stress cone uniform compression stress by compression set, increases stress cone
Face pressure intensity between cable, reduces stress cone and the air gap at cable interface, reduces the generation of shelf depreciation, enter one
Step improves the electric stability of outdoor terminal.
According to currently preferred, the top of the insulating sleeve is provided with high-tension shielding ring, the bottom of the insulating sleeve
Provided with earth shield ring.
The advantage designed herein is, reduce further insulating sleeve surface field intensity, it is to avoid insulating sleeve table
Face local electric field strength is concentrated so that insulating sleeve surface field uniform intensity distribution.
According to currently preferred, the junction between the built-in electrical insulation sleeve and the connecting seat is provided with sealing ring
One, the junction between the connecting seat and the bottom gold utensil is provided with sealing ring two.
The advantage designed herein is, further enhancing sealing property, it is to avoid moisture etc. enters inside insulating sleeve.
According to currently preferred, the top gold utensil upper surface is covered with rain cover, and the upper conductor eduction rod is passed through
Stretched out after the rain cover.
The advantage designed herein is, prevents the top gold utensil that drenches with rain.
According to currently preferred, the top gold utensil and the bottom gold utensil are flange.
Beneficial effects of the present invention are：
1st, stress cone of the present invention is isolated with insulation filling agent, it is to avoid stress cone for a long time contacts what is caused with insulation filling agent
Stress cone material aging, longtime running stability is high.
2nd, built-in electrical insulation sleeve of the present invention sets insulating blanket, and insulating blanket excellent insulating property, compact structure is high, no
Mutually infiltrated with insulation filling agent, long-term operation performance is stable.
The 3rd, internal shield electrode is set inside insulating sleeve of the present invention, and homogenizing closes on position Electric Field Distribution, reduces insulation
Sleeve surface electric-field intensity, insulating sleeve top and bottom are provided with high-tension shielding ring and earth shield ring so that insulation sleeve
Pipe surface electric-field intensity distribution is uniform, so as to reduce the probability of insulating sleeve surface filth accumulation, it is to avoid pollution flashover or
The generation punctured.
4th, built-in electrical insulation sleeve and connecting seat linkage interface of the present invention, connecting seat and lower flange linkage interface are provided with
Sealing ring, it is to avoid moisture etc. enters inside insulating sleeve, effectively strengthens sealing property.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the internal structure enlarged drawing of closed chamber two of the present invention；
1st, upper flange, 2, insulating sleeve, 3, lower flange, 4, insulation filling agent, 5, built-in electrical insulation sleeve, 6, stress
Cone, 7, upper conductor eduction rod, 8, bottom conductor eduction rod, 9, connecting seat, 10, connection conductor, 11, tail pipe, 12, high-tension shielding
Ring, 13, earth shield ring, 14, cable, 15, compression set, 16, rain cover, 17, sealing ring one, 18, sealing ring two, 5.1, interior
Portion's bucking electrode, 5.2, insulating blanket.
Embodiment
The present invention is further qualified with reference to Figure of description and embodiment, but not limited to this.
Embodiment 1
A kind of high voltage direct current cable outdoor terminal, as shown in figure 1, including upper flange 1, insulating sleeve 2, lower flange 3,
Insulation filling agent 4, cable 14, bottom conductor eduction rod 8, connection conductor 10, upper conductor eduction rod 7, stress cone 6, insulation sleeve
Pipe 2 is hollow cylindrical structure, the upper surface of insulating sleeve 2, lower surface respectively with the lower surface of upper flange 1, lower flange 3
End face is connected, and is formed and insulation filling agent 4 is filled with sealed chamber one, sealed chamber one, the inner bottom part of sealed chamber one is provided with close
Room two is sealed, connection conductor 10 is arranged in sealed chamber one, and the connection lower surface of conductor 10 connects close by bottom conductor eduction rod 8
The top of room two is sealed, bottom conductor eduction rod 8 is extended in closed chamber two, the connection upper surface of conductor 10 and upper conductor eduction rod
7 connections, upper conductor eduction rod 7 is through upper flange 1 and stretches out；Cable 14 is extended in closed chamber two through lower flange 3,
Bottom conductor eduction rod 7 is connected, cable 14 is being set with stress cone 6 close to the part of bottom conductor eduction rod 8.
The advantage designed herein is that stress cone 6 is arranged in closed chamber two, has been effectively isolated stress cone 6 and has been filled out with insulation
Fill the direct contact of agent 4, it is to avoid stress cone 6 contacts the material aging of stress cone 6 caused with insulation filling agent 4 for a long time, can be real
Existing longtime running, and stability is high.
Embodiment 2
A kind of high voltage direct current cable outdoor terminal according to embodiment 1, its difference is,
Closed chamber two includes built-in electrical insulation sleeve 5, connecting seat 9, and connecting seat 9 is hollow cylindrical structure, built-in electrical insulation set
The upper surface of cylinder 5 passes through the connection connection conductor 10 of bottom conductor eduction rod 8, the lower surface connection connecting seat 9 of built-in electrical insulation sleeve 5
Upper surface, the lower surface connection lower flange 3 of connecting seat 6 is provided with internal shield electrode 5.1 in built-in electrical insulation sleeve 5, internal
Bucking electrode 5.1 is hollow cylindrical structure.
The advantage designed herein is that the internal shield electrode 5.1 that the inside of built-in electrical insulation sleeve 5 is set, homogenizing closes on portion
Potential electrical field is distributed so that stress cone 6, built-in electrical insulation sleeve 5, insulation filling agent 4, the electric-field intensity of insulating sleeve 2 are uniformly distributed, drop
The low surface field intensity of insulating sleeve 2, so as to reduce the probability of the surface filth of insulating sleeve 2 accumulation, it is to avoid filthy sudden strain of a muscle
Network or the generation punctured.
The surface of internal shield electrode 5.1 is provided with insulating blanket 5.2.
Insulating blanket 5.2 is epoxy resin or insulating paper.The excellent insulating property of insulating blanket 5.2, compact structure is high, no
Mutually infiltrated with insulation filling agent 4, long-term operation performance is stable.
This example terminal structure is applicable to ± 80kV to the direct current cables outdoor terminal of ± 500kV voltage class, general
Property is strong.
Embodiment 3
A kind of high voltage direct current cable outdoor terminal according to embodiment 1, its difference is,
High voltage direct current cable outdoor terminal also includes tail pipe 11, compression set 15, and the bottom of stress cone 6 is provided with compression set
15, the bottom of lower flange 3 connection tail pipe 11, built-in electrical insulation sleeve 5, connecting seat 9, the formation closed chamber two of tail pipe 11, such as Fig. 2 institutes
Show, cable 14 enters closed chamber two through tail pipe 11.
The advantage designed herein is, uniform compression stress is applied on stress cone 6 by compression set 15, increases stress
Cone 6 and cable 14 between face pressure intensity, reduce the air gap of stress cone 6 and the interface of cable 14, reduce shelf depreciation
Produce, further increase the electric stability of outdoor terminal.
Embodiment 4
According to a kind of any described high voltage direct current cable outdoor terminals of embodiment 1-3, its difference is,
The top of insulating sleeve 2 is provided with high-tension shielding ring 12, and the bottom of insulating sleeve 2 is provided with earth shield ring 13.
The advantage designed herein is, reduce further the surface field intensity of insulating sleeve 2, it is to avoid insulating sleeve 2
Surface local electric field strength is concentrated so that the surface field uniform intensity distribution of insulating sleeve 2.
Embodiment 5
According to a kind of any described high voltage direct current cable outdoor terminals of embodiment 1-4, its difference is,
Junction between built-in electrical insulation sleeve 5 and connecting seat 9 is provided with sealing ring 1, connecting seat 9 and lower flange 3 it
Between junction be provided with sealing ring 2 18.
The advantage designed herein is, further enhancing sealing property, it is to avoid moisture etc. enters inside insulating sleeve 2.
Embodiment 6
According to a kind of any described high voltage direct current cable outdoor terminals of embodiment 1-5, its difference is,
The upper surface of upper flange 1 is covered with rain cover 16, and upper conductor eduction rod 7 is passed through to be stretched out after rain cover 6.
The advantage designed herein is, prevents the upper flange 1 that drenches with rain.
Claims (9)
1. a kind of high voltage direct current cable outdoor terminal, including top gold utensil, insulating sleeve, bottom gold utensil, insulation filling agent, electricity
Cable, bottom conductor eduction rod, connection conductor, upper conductor eduction rod, stress cone, upper surface, the lower surface of the insulating sleeve
It is connected respectively with the top gold utensil lower surface, the bottom gold utensil upper surface, forms sealed chamber one, the sealed chamber one
Interior to be filled with the insulation filling agent, it is characterised in that the inner bottom part of sealed chamber one is provided with closed chamber two, the connection is led
Body is arranged in sealed chamber one, and the connection conductor lower surface connects the closed chamber two by the bottom conductor eduction rod
Top, the bottom conductor eduction rod extended in the closed chamber two, the connection conductor upper surface and the upper guide
Body eduction rod is connected, and the upper conductor eduction rod is through top gold utensil and stretches out；The cable prolongs through the bottom gold utensil
Extend in the closed chamber two, connect the bottom conductor eduction rod, the cable is close to the bottom conductor eduction rod
Part is set with stress cone.
2. a kind of high voltage direct current cable outdoor terminal according to claim 1, it is characterised in that the closed chamber two includes
Built-in electrical insulation sleeve, connecting seat, the connecting seat are hollow cylindrical configuration, and the upper surface of the built-in electrical insulation sleeve passes through described
Bottom conductor eduction rod connects the connection conductor, and the lower surface of the built-in electrical insulation sleeve connects the upper end of the connecting seat
Face, the lower surface of the connecting seat, which is connected, is provided with internal shield electrode in the bottom gold utensil, the built-in electrical insulation sleeve.
3. a kind of high voltage direct current cable outdoor terminal according to claim 2, it is characterised in that the internal shield electrode
Surface be provided with insulating blanket.
4. a kind of high voltage direct current cable outdoor terminal according to claim 3, it is characterised in that the insulating blanket is ring
Oxygen tree fat or insulating paper.
5. a kind of high voltage direct current cable outdoor terminal according to claim 2, it is characterised in that the high voltage direct current cable
Outdoor terminal also includes tail pipe, compression set, and the stress cone bottom is provided with compression set, and the bottom gold utensil bottom connects institute
Tail pipe is stated, the built-in electrical insulation sleeve, the connecting seat, the tail pipe form the closed chamber two, and the cable is described in
Tail pipe enters the closed chamber two.
6. a kind of high voltage direct current cable outdoor terminal according to claim 1, it is characterised in that the insulating sleeve it is upper
Portion is provided with high-tension shielding ring, and the bottom of the insulating sleeve is provided with earth shield ring.
7. a kind of high voltage direct current cable outdoor terminal according to claim 2, it is characterised in that the built-in electrical insulation sleeve
Junction between the connecting seat is provided with sealing ring one, and the junction between the connecting seat and the bottom gold utensil is provided with
Sealing ring two.
8. a kind of high voltage direct current cable outdoor terminal according to claim 1, it is characterised in that the top gold utensil upper end
Mask has rain cover, and the upper conductor eduction rod is passed through to be stretched out after the rain cover.
9. according to a kind of any described high voltage direct current cable outdoor terminals of claim 1-8, it is characterised in that the top gold
Have and the bottom gold utensil is flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710631345.0A CN107332195A (en) | 2017-07-28 | 2017-07-28 | A kind of high voltage direct current cable outdoor terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710631345.0A CN107332195A (en) | 2017-07-28 | 2017-07-28 | A kind of high voltage direct current cable outdoor terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107332195A true CN107332195A (en) | 2017-11-07 |
Family
ID=60200279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710631345.0A Withdrawn CN107332195A (en) | 2017-07-28 | 2017-07-28 | A kind of high voltage direct current cable outdoor terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107332195A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342899A (en) * | 2018-11-23 | 2019-02-15 | 长园电力技术有限公司 | A kind of test terminal of direct current cables |
| CN110224367A (en) * | 2019-07-04 | 2019-09-10 | 中车青岛四方车辆研究所有限公司 | A kind of EMU hv cable termination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976476Y (en) * | 2006-12-05 | 2007-11-14 | 广东长园电缆附件有限公司 | High-voltage air gap shielding processed cable terminal |
| WO2011043313A1 (en) * | 2009-10-09 | 2011-04-14 | 株式会社ビスキャス | Power cable termination for aerial connection and process for producing power cable termination for aerial connection |
| CN204144888U (en) * | 2014-09-28 | 2015-02-04 | 广东吉熙安电缆附件有限公司 | A kind of high voltage direct current cable outdoor terminal |
| CN205070380U (en) * | 2015-10-30 | 2016-03-02 | 上海上缆藤仓电缆有限公司 | 320kV DC cable outdoor termination |
| CN206977010U (en) * | 2017-07-28 | 2018-02-06 | 特变电工昭和（山东）电缆附件有限公司 | A kind of high voltage direct current cable outdoor terminal |
-
2017
- 2017-07-28 CN CN201710631345.0A patent/CN107332195A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976476Y (en) * | 2006-12-05 | 2007-11-14 | 广东长园电缆附件有限公司 | High-voltage air gap shielding processed cable terminal |
| WO2011043313A1 (en) * | 2009-10-09 | 2011-04-14 | 株式会社ビスキャス | Power cable termination for aerial connection and process for producing power cable termination for aerial connection |
| CN204144888U (en) * | 2014-09-28 | 2015-02-04 | 广东吉熙安电缆附件有限公司 | A kind of high voltage direct current cable outdoor terminal |
| CN205070380U (en) * | 2015-10-30 | 2016-03-02 | 上海上缆藤仓电缆有限公司 | 320kV DC cable outdoor termination |
| CN206977010U (en) * | 2017-07-28 | 2018-02-06 | 特变电工昭和（山东）电缆附件有限公司 | A kind of high voltage direct current cable outdoor terminal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342899A (en) * | 2018-11-23 | 2019-02-15 | 长园电力技术有限公司 | A kind of test terminal of direct current cables |
| CN110224367A (en) * | 2019-07-04 | 2019-09-10 | 中车青岛四方车辆研究所有限公司 | A kind of EMU hv cable termination |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171107 |
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| WW01 | Invention patent application withdrawn after publication |