WO2016190823A1 - Link box with built-in partial discharge sensor - Google Patents
Link box with built-in partial discharge sensor Download PDFInfo
- Publication number
- WO2016190823A1 WO2016190823A1 PCT/TR2015/000213 TR2015000213W WO2016190823A1 WO 2016190823 A1 WO2016190823 A1 WO 2016190823A1 TR 2015000213 W TR2015000213 W TR 2015000213W WO 2016190823 A1 WO2016190823 A1 WO 2016190823A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- partial discharge
- box
- link box
- cable
- link
- Prior art date
Links
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 210000004907 gland Anatomy 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 4
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001052 transient 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
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
- H02G15/103—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress
- H02G15/105—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress connected to the cable shield only
- H02G15/1055—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes with devices for relieving electrical stress connected to the cable shield only with cross-bonding of cable shields
Definitions
- the present invention relates to link boxes which is electrically and mechanically integral accessories of cable bonding system.
- the invention especially relates to a link box with built-in partial discharge sensor for partial discharge measurement in high voltage cable joints and terminations.
- High voltage cables are always designed with metallic sheath to controls the electric field stress in the cable insulation and also providing return path for fault current.
- AC voltages may be induced on metallic sheath due to electromagnetic coupling between core and the metallic sheath.
- special bonding and grounding methods such as single point bonding and cross bonding are used in high voltage cable systems.
- Link boxes are the metallic enclosures in which bonding and grounding of sheathes of high voltage cable joints or terminations made through removable links. Link boxes also may contain sheath voltage limiters to limit lightning or switching overvoltages of cable system. Link boxes are installed close to high voltage cable joints or terminations and may be installed in places such as underground manholes, aboveground pedestals or tunnel walls and etc. Diagnostic testing of new or service-aged installed high voltage power cable systems which include cable, joints, and terminations, using partial discharge detection, measurement and locating, has a long history. After-laying partial discharge testing on newly installed cable system is an efficient method to find defects in accessories, e.g. improper positioning, cuts or scratches, contaminations etc. Partial discharge testing on service-aged cable systems is a useful indicator of insulation degradation.
- Partial discharge testing may be carried out on-line (at normal service voltage) or off-line (by an external voltage source). Moreover, continuous on-line monitoring of cable systems has received more attention in recent years. Partial discharge measurement on long high voltage cable systems can be carried out by three different methods including 1 Partial discharge detection at cable end using coupling capacitor, 2 Partial discharge detection at cable accessories using embedded sensors inside the joints or terminations 3 Partial discharge detection at link boxes using inductive sensors (e.g. high frequency current transformers).
- Test procedure includes installing temporary high frequency current transformers, protection circuit setup and connection of cables to portable partial discharge test device. These steps can be time- consuming procedure. Furthermore, there is a commonly encountered problem for online partial discharge measurement at link boxes. In such cases, split-core high frequency current transformers are needed. Also, mounting these sensors during online conditions requires live-working on energized link box which may be dangerous for test stuff. Also, this procedure is time & labor consuming in long HV cable systems with a great number of link boxes.
- the Application No. CN 202443038 U relates to high-voltage cable intelligence earth box.
- Another application which has been encountered as a result of the technical researches is the Patent No. CN 103308832 A which relates to a partial discharge test device for high-voltage cable insulation middle joint and use method.
- neither of the applications have a novelty which aims to solve the aforementioned drawbacks.
- the invention configured by being inspired by the current conditions, aims to solve the above mentioned drawbacks.
- Present invention introduces an all-in-one solution for above mentioned problems of partial discharge measurement in link boxes.
- the object of the present invention is to avoid unexpected high induced voltages by short circuits which may occur during offline commissioning tests or online tests using this type of link boxes and performing partial discharge testing easily, just by connecting portable partial discharge test device to its terminal box through spark gap protection box.
- detected partial discharge signals can be sent out of the link box via signal cables through sealed glands. This alternative is very useful in online partial discharge monitoring systems that permanent installation of high frequency current transformers is required.
- partial discharge sensors shall be installed inside a sealed box so they are not affected by environmental conditions or any other hazards.
- the present invention is a link box which provides bonding and grounding of sheathes of voltage cable joints or terminations and comprises ⁇ an enclosure body which all other components are placed inside and protects the all components from environmental effects,
- ⁇ disconnectable crossing bars which provide a cross connection of coaxial bonding cables inside the link box characterized in comprising;
- a protection box located in additional housing intended for connecting partial discharge test device and also provides protection of test circuit using spark gaps inside.
- said link box is comprising sensor cable glands which provide sending of detected partial discharge signals out of the link box and monitoring them.
- FIG. 1 shows components of the present invention.
- FIG. 2 shows top view present invention in detail.
- Figure 3 shows schematic view of a high voltage cable system during offline and online partial discharge test.
- Figure 4 shows arrangement of current invention when it used for online monitoring.
- the invention relates to a link box (100) with built-in partial discharge sensor (10) for partial discharge measurement in high voltage cable joints and terminations (17, 6).
- Fig.1 shows components of the present invention.
- Link box (100) includes a stainless steel enclosure body (1) and stainless steel enclosure cover (2).
- Enclosure body (1) can be seen as a base frame for mounting internal parts and protection of internal parts against environmental conditions.
- Three coaxial bonding cables (4) are used to connect metallic sheath of high voltage cable joints (17) to link box (100).
- Earthing cable (5) is connected to earthing busbar inside the link box (100) and then it's ready to be connected to earthing electrode outside of the link box (100). Sealed penetration of coaxial bonding cables (4) and earthing cable (5) into enclosure body (1) made by cable glands (3).
- Partial discharge detection is made by three partial discharge sensors (10) (high frequency current transformers) placed around main conductor of coaxial bonding cables (4) or disconnectable crossing bars (18), which are used to provide a cross connection of coaxial bonding cables (4), located inside the link box (100) which act as primary winding for partial discharge sensor (10). Pulses of partial discharge signals are induced to secondary of partial discharge sensor (10) and then transmitted to additional housing (6) using signal cables (11).
- Fig.2 shows top view of present invention in detail.
- Detected partial discharge signals enters a sealed additional housing (6) located on the enclosure cover (2). Sealing of this additional housing (6) made by a gasket (8).
- This additional housing (6) contains a protection box (9) with protective spark gaps inside.
- there is a galvanic isolation between primary and secondary side of partial discharge sensors (10) but electromagnetic induction on signal cables (11) and BNC input sockets (14) may occur during transient conditions. So this protection circuit is necessary to prevent any danger to portable test device or test stuff during tests.
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a link box (100) for bonding and grounding of sheathes of high voltage cable joints or terminations (17, 16) consisting partial discharge sensors (10) placed around coaxial bonding cables (4) located inside the link box (100) which act as primary winding for partial discharge sensor (10) and provide detection of partial discharge in sheathes of high voltage cable joints (17) and cable terminations (16); an additional housing (6) located on the enclosure cover (2) which pulses of partial discharge signals are transmitted using signal cables (11) connecting partial discharge sensors (10) to protection box (9) and provides carrying out of partial discharge measurement just only by opening the housing cover (7) without opening enclosure cover (2) and a protection box (9) located in additional housing (6) intended for connection of partial discharge test device and also provides protection of the circuit using spark gaps inside and also sensor cable glands (12) to send out the partial discharge signals to partial discharge monitoring system and it can be covered by threaded caps (13) when this option is not being used.
Description
LINK BOX WITH BUILT-IN PARTIAL DISCHARGE SENSOR Technical Field
The present invention relates to link boxes which is electrically and mechanically integral accessories of cable bonding system. The invention especially relates to a link box with built-in partial discharge sensor for partial discharge measurement in high voltage cable joints and terminations.
State of the Art High voltage cables are always designed with metallic sheath to controls the electric field stress in the cable insulation and also providing return path for fault current. During normal operation of cable system, AC voltages may be induced on metallic sheath due to electromagnetic coupling between core and the metallic sheath. In order to limit the magnitude of sheath voltages and also to minimize the flow of circulating currents, special bonding and grounding methods such as single point bonding and cross bonding are used in high voltage cable systems.
Link boxes are the metallic enclosures in which bonding and grounding of sheathes of high voltage cable joints or terminations made through removable links. Link boxes also may contain sheath voltage limiters to limit lightning or switching overvoltages of cable system. Link boxes are installed close to high voltage cable joints or terminations and may be installed in places such as underground manholes, aboveground pedestals or tunnel walls and etc. Diagnostic testing of new or service-aged installed high voltage power cable systems which include cable, joints, and terminations, using partial discharge detection, measurement and locating, has a long history. After-laying partial discharge testing on newly installed cable system is an efficient method to find defects in accessories, e.g. improper positioning, cuts or scratches, contaminations etc. Partial discharge testing on service-aged cable systems is a useful indicator of insulation degradation. Partial discharge testing may be carried out on-line (at normal service voltage) or off-line (by an external voltage source). Moreover, continuous on-line monitoring of cable systems has received more attention in recent years.
Partial discharge measurement on long high voltage cable systems can be carried out by three different methods including 1 Partial discharge detection at cable end using coupling capacitor, 2Partial discharge detection at cable accessories using embedded sensors inside the joints or terminations 3Partial discharge detection at link boxes using inductive sensors (e.g. high frequency current transformers).
According to current practices, off-line partial discharge measurement during commissioning tests at existing link boxes carried out by installation of temporary partial discharge sensors around sheath bonding cables or cross bonding links of link boxes. Test procedure includes installing temporary high frequency current transformers, protection circuit setup and connection of cables to portable partial discharge test device. These steps can be time- consuming procedure. Furthermore, there is a commonly encountered problem for online partial discharge measurement at link boxes. In such cases, split-core high frequency current transformers are needed. Also, mounting these sensors during online conditions requires live-working on energized link box which may be dangerous for test stuff. Also, this procedure is time & labor consuming in long HV cable systems with a great number of link boxes.
Another problem is encountered when installing permanent high frequency current transformers as a part of online partial discharge monitoring systems. According to current practices, high frequency current transformers are installed around sheath bonding cable itself. This method is not an engineering solution because these sensors are subjected to environmental conditions during its service life or may be damaged due to faults in cable system.
Having been encountered as a result of the technical researches, the Application No. CN 202443038 U relates to high-voltage cable intelligence earth box. Another application which has been encountered as a result of the technical researches is the Patent No. CN 103308832 A which relates to a partial discharge test device for high-voltage cable insulation middle joint and use method. However, neither of the applications have a novelty which aims to solve the aforementioned drawbacks.
As a result, due to the drawbacks mentioned above and the inadequacy of the existing solutions regarding the subject matter, it is required to make a development in the related technical field.
Objects of the Invention
The invention, configured by being inspired by the current conditions, aims to solve the above mentioned drawbacks.
Present invention introduces an all-in-one solution for above mentioned problems of partial discharge measurement in link boxes.
The object of the present invention is to avoid unexpected high induced voltages by short circuits which may occur during offline commissioning tests or online tests using this type of link boxes and performing partial discharge testing easily, just by connecting portable partial discharge test device to its terminal box through spark gap protection box.
Increased safety of test stuff and reduced time and labor work during partial discharge test at link boxes are the main advantages of present invention.
Moreover, detected partial discharge signals can be sent out of the link box via signal cables through sealed glands. This alternative is very useful in online partial discharge monitoring systems that permanent installation of high frequency current transformers is required. By using present invention, partial discharge sensors shall be installed inside a sealed box so they are not affected by environmental conditions or any other hazards.
To achieve the aforementioned objects, the present invention is a link box which provides bonding and grounding of sheathes of voltage cable joints or terminations and comprises · an enclosure body which all other components are placed inside and protects the all components from environmental effects,
• an enclosure cover which is upper part for the link box,
• cable glands through which provide entering into enclosure body of earthing cable and coaxial bonding cables,
· disconnectable crossing bars which provide a cross connection of coaxial bonding cables inside the link box characterized in comprising;
• partial discharge sensors placed inside link box around coaxial bonding cables or disconnectable crossing bars which act as primary winding for partial discharge
sensor and provide detection of partial discharge in high voltage cable joints and terminations,
• an additional housing located on the enclosure cover which pulses of partial discharge signals are transmitted using signal cables connecting partial discharge sensors to protection box and provides carrying out of partial discharge measurement during partial discharge test just only by opening the housing cover without opening enclosure cover,
• a protection box located in additional housing intended for connecting partial discharge test device and also provides protection of test circuit using spark gaps inside.
In another preferred embodiment of the present invention, said link box is comprising sensor cable glands which provide sending of detected partial discharge signals out of the link box and monitoring them.
The structural and characteristic features and all the advantages of the present invention will be more clearly understood thanks to the figures below and the detailed description written with reference to those figures, therefore; the evaluation needs to be done by taking said figures and the detailed description into consideration.
Figures for a Better Understanding of the Invention
Figure 1 shows components of the present invention.
Figure 2 shows top view present invention in detail.
Figure 3 shows schematic view of a high voltage cable system during offline and online partial discharge test.
Figure 4 shows arrangement of current invention when it used for online monitoring.
The drawings do not need to be scaled and the details that are not necessary for understanding the present invention may have been ignored. In addition, the elements that are at least identical to a great extent or at least have identical functions to a great extent are referred with the same number.
Description of the Part References 1. Enclosure body
2. Enclosure cover
3. Cable gland
4. Coaxial bonding cable
5. Earthing cable
6. Additional housing
7. Housing cover
8. Gasket
9. Protection box
10. Partial discharge sensor
11. Signal cable
12. Sensor cable gland
13. Threaded cap
14. Input socket
15. Output socket
16. Cable termination
17. Cable joint
18. Disconnectable crossing bar
19. Sealing gasket
100. Link box
Detailed Description of the Invention
In this detailed description, the preferred embodiments of the invention are described only for a better understanding of the subject without any limiting effect.
The invention relates to a link box (100) with built-in partial discharge sensor (10) for partial discharge measurement in high voltage cable joints and terminations (17, 6).
Fig.1 shows components of the present invention. Link box (100) includes a stainless steel enclosure body (1) and stainless steel enclosure cover (2). Enclosure body (1) can be seen as a base frame for mounting internal parts and protection of internal parts against environmental conditions. Three coaxial bonding cables (4) are used to connect metallic sheath of high voltage cable joints (17) to link box (100). Earthing cable (5) is connected to earthing busbar inside the link box (100) and then it's ready to be connected to earthing electrode outside of the link box (100). Sealed penetration of coaxial bonding cables (4) and earthing cable (5) into enclosure body (1) made by cable glands (3).
Partial discharge detection is made by three partial discharge sensors (10) (high frequency current transformers) placed around main conductor of coaxial bonding cables (4) or disconnectable crossing bars (18), which are used to provide a cross connection of coaxial bonding cables (4), located inside the link box (100) which act as primary winding for partial discharge sensor (10). Pulses of partial discharge signals are induced to secondary of partial discharge sensor (10) and then transmitted to additional housing (6) using signal cables (11).
Fig.2 shows top view of present invention in detail. Detected partial discharge signals enters a sealed additional housing (6) located on the enclosure cover (2). Sealing of this additional housing (6) made by a gasket (8). This additional housing (6) contains a protection box (9) with protective spark gaps inside. There are also three BNC input and three output sockets (14, 15) in additional housing (6) for connection of signal cables (1 1) and also connecting portable partial discharge test device to the protection box (9). Although, there is a galvanic isolation between primary and secondary side of partial discharge sensors (10), but electromagnetic induction on signal cables (11) and BNC input sockets (14) may occur during transient conditions. So this protection circuit is necessary to prevent any danger to portable test device or test stuff during tests.
As shown in Fig.3, offline or online partial discharge testing in present invention is possible just only by opening the housing cover (7) and connecting partial discharge test device to protection box (9). Opening the enclosure cover (2) of link box (100) is not required in this case. It is to be noted that underground link boxes (100) are generally installed in small manholes with limited space so opening of enclosure cover (2) is not done easily. Moreover, opening-closing of enclosure cover (2) may lead to lifetime reduction of sealing gasket (19).
As shown in Fig.4, it is possible to use present invention as a part of online partial discharge monitoring systems. Detected partial discharge signals are sent out of the link box (100) toward monitoring system through sealed small sensor cable glands (12). When this option is not used, sensor cable glands (12) shall be covered by threaded caps (13).
Claims
A link box (100) which provides bonding and grounding of sheathes of high voltage cable joints or terminations (17, 16) and comprises
- an enclosure body (1) which all other components are placed inside and protects the all components from environmental effects,
- an enclosure cover (2) which is upper part for the link box (100),
cable glands (3) through which provide entering into enclosure body (1) of earthing cable (5) and coaxial bonding cables (4),
- disconnectable crossing bars (18) which provide a cross connection of coaxial bonding cables (4) inside the link box (100) characterized in comprising;
- partial discharge sensors (10) placed inside the link box (100) around coaxial bonding cables (4) or disconnectable crossing bars (18) which act as primary winding for partial discharge sensor (10) and provide detection of partial discharge in high voltage cable joints (17) and cable terminations (16),
- an additional housing (6) located on the enclosure cover (2) which pulses of partial discharge signals are transmitted using signal cables (11) connecting partial discharge sensors (10) to protection box (9) and provides carrying out of partial discharge measurement during partial discharge test just only by opening the housing cover (7) without opening enclosure cover (2),
- a protection box (9) located in additional housing (6) intended for connecting partial discharge test device and also provides protection of test circuit using spark gaps inside.
The link box (100) according to Claim 1 , characterized in comprising sensor cable glands (12) which provide sending of detected partial discharge signals out of the link box (100) and monitoring them.
The link box (100) according to Claim 2, characterized in comprising threaded caps (13) which sensor cable glands (12) are covered by when sensor cable glands (12) is not used.
The link box (100) according to Claim 1, characterized in comprising input and output sockets (14, 15) in additional housing (6) for connection of signal cables (11) and also test device to the protection box (9).
5. The link box (100) according to Claim 1 , characterized in comprises gasket (8) which provides sealing of the additional housing (6).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1702592.5A GB2543467B (en) | 2015-05-28 | 2015-05-28 | Link box with built-in partial discharge sensor |
| PCT/TR2015/000213 WO2016190823A1 (en) | 2015-05-28 | 2015-05-28 | Link box with built-in partial discharge sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/TR2015/000213 WO2016190823A1 (en) | 2015-05-28 | 2015-05-28 | Link box with built-in partial discharge sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016190823A1 true WO2016190823A1 (en) | 2016-12-01 |
Family
ID=53541884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2015/000213 WO2016190823A1 (en) | 2015-05-28 | 2015-05-28 | Link box with built-in partial discharge sensor |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2543467B (en) |
| WO (1) | WO2016190823A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019194754A1 (en) * | 2018-04-04 | 2019-10-10 | Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Link box with built-in insulator type voltage divider and inductive partial discharge sensor |
| US10686308B1 (en) | 2019-04-05 | 2020-06-16 | hvGrid-tech Inc. | Sheath-bonding link box |
| CN111830373A (en) * | 2020-06-15 | 2020-10-27 | 贵州电网有限责任公司 | Power equipment partial discharge detection device convenient to operation is used |
| US11183828B1 (en) | 2020-06-12 | 2021-11-23 | hvGrid-tech Inc. | Device with health monitoring |
| CN114518509A (en) * | 2021-12-24 | 2022-05-20 | 宜兴市苏信智能技术发展研究中心 | Partial discharge monitoring equipment of multiple physical quantity |
| US20220166199A1 (en) * | 2019-04-05 | 2022-05-26 | hvGrid-tech Inc. | Sheath-bonding link box |
| FR3134896A1 (en) * | 2022-04-26 | 2023-10-27 | Nexans | DEVICE FOR MONITORING THE OPERATION OF ELECTRIC CABLES IN A MESH NETWORK |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04183219A (en) * | 1990-11-16 | 1992-06-30 | Showa Electric Wire & Cable Co Ltd | Power cable line and partial discharge detecting method therefor |
| EP2392934A1 (en) * | 2010-06-02 | 2011-12-07 | Omicron electronics GmbH | Method and device for surveillance of a sheath voltage arrester of a cable system |
| CN202443038U (en) | 2012-02-22 | 2012-09-19 | 广东电网公司珠海供电局 | High-voltage cable intelligence earth box |
| CN103308832A (en) | 2013-05-31 | 2013-09-18 | 国家电网公司 | Partial discharge test device for high-voltage cable insulation middle joint and use method |
| CN103427390A (en) * | 2013-08-24 | 2013-12-04 | 广州友智电气技术有限公司 | Intelligent intersected interconnection box device |
-
2015
- 2015-05-28 WO PCT/TR2015/000213 patent/WO2016190823A1/en active Application Filing
- 2015-05-28 GB GB1702592.5A patent/GB2543467B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04183219A (en) * | 1990-11-16 | 1992-06-30 | Showa Electric Wire & Cable Co Ltd | Power cable line and partial discharge detecting method therefor |
| EP2392934A1 (en) * | 2010-06-02 | 2011-12-07 | Omicron electronics GmbH | Method and device for surveillance of a sheath voltage arrester of a cable system |
| CN202443038U (en) | 2012-02-22 | 2012-09-19 | 广东电网公司珠海供电局 | High-voltage cable intelligence earth box |
| CN103308832A (en) | 2013-05-31 | 2013-09-18 | 国家电网公司 | Partial discharge test device for high-voltage cable insulation middle joint and use method |
| CN103427390A (en) * | 2013-08-24 | 2013-12-04 | 广州友智电气技术有限公司 | Intelligent intersected interconnection box device |
Non-Patent Citations (3)
| Title |
|---|
| EMELEC ELEKTRIK: "EM Elektrik Malzemeleri Yüklenim San. Tic. Ltd. Sti.", 12 July 2012 (2012-07-12), XP055249707, Retrieved from the Internet <URL:http://web.archive.org/web/20120712194515/http://www.emelec.com.tr/LinkBoxTestDownload.aspx> [retrieved on 20160212] * |
| EMELEC ELEKTRIK: "TT 0710/01 TYPE TEST OF 3 Phase Cross Bonding Link Box, Type: LB.U.CB.3SA.3.1", 12 July 2012 (2012-07-12), pages 0 - 51, XP055249706, Retrieved from the Internet <URL:http://www.emelec.com.tr/download/testbox/TT0710-01 IPH-UCB.pdf> [retrieved on 20160212] * |
| W KOLTUNOWICZ ET AL: "PD MONITORING OF HV XLPE CABLE LINES", PROCEEDINGS OF THE 16TH INTERNATIONAL SYMPOSIUM ON HIGH VOLTAGE ENGINEERING CAPE TOWN, SOUTH AFRICA 24-28 AUGUST 2009, 24 August 2009 (2009-08-24), pages 1 - 6, XP055176447, ISBN: 978-0-62-044584-9, Retrieved from the Internet <URL:http://www.dii.unipd.it/~pesavento/download/ISH2009/Papers/Paper-D-50.pdf> [retrieved on 20150313] * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019194754A1 (en) * | 2018-04-04 | 2019-10-10 | Em Elektri̇k Malzemeleri̇ Yükleni̇m Sanayi̇ Ti̇caret Anoni̇m Şi̇rketi̇ | Link box with built-in insulator type voltage divider and inductive partial discharge sensor |
| US10686308B1 (en) | 2019-04-05 | 2020-06-16 | hvGrid-tech Inc. | Sheath-bonding link box |
| WO2020198875A1 (en) * | 2019-04-05 | 2020-10-08 | hvGrid-tech Inc. | Sheath-bonding link box |
| US20220166199A1 (en) * | 2019-04-05 | 2022-05-26 | hvGrid-tech Inc. | Sheath-bonding link box |
| EP3949045A4 (en) * | 2019-04-05 | 2023-03-22 | Hvgrid-Tech Inc. | Sheath-bonding link box |
| US12316087B2 (en) * | 2019-04-05 | 2025-05-27 | hvGrid-tech Inc. | Sheath-bonding link box |
| US11183828B1 (en) | 2020-06-12 | 2021-11-23 | hvGrid-tech Inc. | Device with health monitoring |
| WO2021250465A1 (en) * | 2020-06-12 | 2021-12-16 | hvGrid-tech Inc. | Device with health monitoring |
| CN111830373A (en) * | 2020-06-15 | 2020-10-27 | 贵州电网有限责任公司 | Power equipment partial discharge detection device convenient to operation is used |
| CN114518509A (en) * | 2021-12-24 | 2022-05-20 | 宜兴市苏信智能技术发展研究中心 | Partial discharge monitoring equipment of multiple physical quantity |
| FR3134896A1 (en) * | 2022-04-26 | 2023-10-27 | Nexans | DEVICE FOR MONITORING THE OPERATION OF ELECTRIC CABLES IN A MESH NETWORK |
| EP4270023A1 (en) * | 2022-04-26 | 2023-11-01 | Nexans | Device for monitoring the operation of electrical cables in a mesh network |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201702592D0 (en) | 2017-04-05 |
| GB2543467B (en) | 2021-03-03 |
| GB2543467A (en) | 2017-04-19 |
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