CN106842448B - Insulating surplus cable case that falls to ground of cable that advances on transformer substation - Google Patents
Insulating surplus cable case that falls to ground of cable that advances on transformer substation Download PDFInfo
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- CN106842448B CN106842448B CN201710071747.XA CN201710071747A CN106842448B CN 106842448 B CN106842448 B CN 106842448B CN 201710071747 A CN201710071747 A CN 201710071747A CN 106842448 B CN106842448 B CN 106842448B
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- cable
- opgw
- box
- insulating
- transformer substation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4452—Distribution frames
Abstract
The invention relates to the technical field of residual cable boxes, in particular to an insulated and floor residual cable box for a cable inlet on a transformer substation, which comprises a box body and an OPGW optical cable descending device, wherein an OPGW optical cable enters the box body from the top of a door-type framework through the OPGW optical cable descending device, the box body is arranged at the bottom of the door-type framework, the OPGW optical cable descending device comprises an OPGW voltage limiting device and a fixing device, the OPGW voltage limiting device is arranged at the top of the door-type framework, and a needle insulator is arranged on the fixing device.
Description
Technical Field
The invention relates to the technical field of residual cable boxes, in particular to an insulating and landing residual cable box for an inlet cable on a transformer substation.
Background
At present, part of power companies are led down by a gate-type framework at a transformer substation OPGW, a parallel groove clamp and a grounding wire are adopted at the position 1.5 m away from the ground of an OPGW optical cable, and a special grounding device of the gate-type framework is grounded, wherein the OPGW optical cable passes through a hot dip galvanized steel pipe with the diameter of 50mm at the position 1 m away from the ground, and before passing through the hot dip galvanized steel pipe and entering a cable pit, the OPGW optical cable needs to pass through an insulating sleeve, so that the OPGW optical cable is insulated from the galvanized steel pipe, the gate-type framework and the ground. OPGW optical cable gets into surplus cable case in the place from the cable pit, and OPGW optical cable dish exists on surplus cable case inside positive metal cross, and ordinary optical cable dish exists on surplus cable frame in surplus cable case back, and OPGW joint box installs in surplus cable case positive upper left corner for OPGW optical cable welds with ordinary optical cable, and the ordinary optical cable of welding is got into the transformer substation communication computer lab along the cable pit.
The OPGW floor residual cable box is designed by referring to annex B of the technical specification of the installation of the communication optical cable of the Q/GDW 758-2012 electric power system, and the OPGW floor residual cable box is attractive in appearance and solves the problem of reliable insulation of the OPGW in theory, but the problem of reliable insulation of the OPGW optical cable is not completely solved in practice, and meanwhile, the problems of inconvenient pole climbing operation, unsafe and the like when a transformer substation performs annual insulation supervision detection and measurement on the resistance of a grounding network of the transformer substation are solved.
The OPGW optical cable is guided down from the gate framework in the whole process, and the OPGW optical cable and the gate framework are kept insulated and fixed by adopting a rubber clamp. The problem of OPGW optical cable-release pole-building is easily caused by the fact that rubber oxidation can be accelerated when rubber clamps and rubber pads are used in a high-voltage induction electric environment of a transformer substation.
Disclosure of Invention
The invention aims to solve the defects of poor insulativity and insecure grounding in the prior art, and provides an insulating and floor residual cable box for a cable in a transformer substation.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the cable feeding insulation floor residual cable box on the transformer substation comprises a box body and an OPGW cable downdraw device, wherein an OPGW cable enters the box body from the top of a door-shaped framework through the OPGW cable downdraw device, the box body is arranged at the bottom of the door-shaped framework, the OPGW cable downdraw device comprises an OPGW voltage limiting device and a fixing device, the OPGW voltage limiting device is arranged at the top of the door-shaped framework, a needle insulator is arranged on the fixing device, the OPGW cable is arranged on the needle insulator and the voltage limiting device, a first grounding wire is connected to the voltage limiting device, and the other end of the first grounding wire is connected with the door-shaped framework;
the cable box is characterized in that a cable inlet hole is formed in one side of the top of the box body, a nylon insulating pipe is arranged on the cable inlet hole, a waterproof plug is arranged at the upper end of the nylon insulating pipe, a first cable locking device is arranged in the box body and close to the cable inlet hole, a second grounding wire is connected to the first cable locking device, a grounding disconnecting link is arranged at the bottom of the box body, the grounding disconnecting link is connected with a transformer substation grounding grid through a grounding wire, the second grounding wire is connected with the grounding disconnecting link, an insulating isolation plate is arranged in the box body, an OPGW cable tray is arranged on one side of the insulating isolation plate, a cable passing hole is formed in one side of the insulating isolation plate, a second cable locking device is arranged at the other side of the insulating isolation plate and close to the cable passing hole, a third grounding wire is connected to the third grounding wire, an optical fiber direct-melting disc and an optical cable fixing seat are arranged on the back of the insulating isolation plate, a hollow residual cable box bottom seat is arranged at the bottom of the box, and through holes are formed in the bottom and top of the residual cable box bottom.
Preferably, the fixing device comprises pin pulling rod customizing hoops which are equidistantly arranged on the upper portion of the door-shaped framework, U-shaped clamping devices which are arranged in the middle of the door-shaped framework and herringbone rod customizing hoops which are equidistantly arranged on the lower portion of the door-shaped framework, the pin pulling rod customizing hoops and the herringbone rod customizing hoops comprise two semicircular hoops and a mounting frame, the OPGW voltage limiting device and the needle insulator are fixed on the mounting frame, and the two semicircular hoops are connected through two connecting bolts.
Preferably, the OPGW voltage limiting device comprises a high-voltage arc striking rod and a low-voltage arc striking rod which are parallel to each other, a plurality of outer sleeve umbrella skirts are arranged outside the high-voltage arc striking rod at equal intervals, discharge balls are arranged at the end parts of the high-voltage arc striking rod and the low-voltage arc striking rod, one end of the high-voltage arc striking rod is connected with a first grounding wire, and the OPGW optical cable is fixed at the other end of the high-voltage arc striking rod.
Preferably, the back of the insulating isolation plate is also provided with a wire arranging plate, the wire arranging plate is provided with a plurality of wire binding grooves, and the wire arranging plate is provided with a movable cover plate through bolts.
Preferably, the grounding knife switch comprises a knife switch and two connectors, the two connectors are connected in series, the two connectors are connected through the knife switch and the ground wire, the second grounding wire is connected with one connector, and the third grounding wire is connected with the other connector.
Preferably, the box body, the OPGW cable rack and the insulating isolation board are made of insulating SMC materials or epoxy resin boards.
The invention provides a cable insulation and landing residual cable box on a transformer substation, which has the beneficial effects that:
1. the needle insulator is adopted to fix the OPGW optical cable, so that reliable insulation between the OPGW optical cable and the door type framework is effectively ensured, the box body, the OPGW disc cable frame and the insulating isolation plate are made of insulating SMC materials or epoxy resin plates, reliable insulation is truly realized after the OPGW residual cables are coiled, and hidden troubles such as cable burning and strand breakage of the OPGW optical cable caused by insulation problems are avoided;
2. the voltage limiting device is arranged to carry out voltage limiting discharge on lightning stroke induced electricity and induced electricity in the transformer substation, and the grounding wires are arranged in the voltage limiting device and the box body, so that reliable grounding is ensured, and hidden danger of OPGW optical cable lightning stroke induced electricity, turn-to-turn discharge electric erosion cable burning and strand breakage caused by grounding problems is avoided;
3. the grounding wire is grounded through the grounding switch blade, when the annual insulation supervision detection of the OPGW of the transformer substation and the resistance detection of the grounding network of the transformer substation are carried out, the grounding switch inside the insulation residual cable box is only required to be disconnected, after the test is finished, the grounding switch is closed, so that the test time is saved, the power failure loss is reduced, the maintenance is convenient, and the risk of pole climbing operation is avoided.
And 4, when the OPGW is 2 meters away from the ground, the OPGW passes through the nylon insulating tube and enters the residual cable box inventory, and the OPGW guides the lower cable to enter the box body without entering the cable pit, so that the insulating tube material through which the OPGW optical cable passes is omitted.
5. The invention has reliable insulation and good grounding performance, effectively solves the hidden troubles of OPGW optical cable such as electric erosion and cable burning, strand breakage and the like, has convenient construction and simple maintenance, and has good popularization value.
Drawings
Fig. 1 is a schematic structural diagram of an insulation and landing residual cable box for a cable in a transformer substation;
fig. 2 is a schematic structural diagram of the front surface of a box body of an insulating and falling residual cable box for a cable feeding on a transformer substation;
fig. 3 is a schematic structural diagram of the back of a box body of an insulating and falling residual cable box for a cable feeding on a transformer substation;
fig. 4 is a schematic structural diagram of a voltage limiting device of a cable insulation and landing residual cable box on a transformer substation;
fig. 5 is a schematic structural diagram of a needle insulator of a cable-feeding insulation and landing residual cable box on a transformer substation;
fig. 6 is a schematic structural diagram of a pin pulling rod customizing hoop of an insulating and landing residual cable box of a cable feeding device on a transformer substation;
fig. 7 is a schematic structural diagram of a herringbone pole custom-made hoop of a cable feeding insulation and landing residual cable box on a transformer substation;
fig. 8 is a schematic structural diagram of a U-shaped fixture of an insulation cable box on a transformer substation.
In the figure: the cable-locking device comprises an OPGW voltage limiting device 1, a needle insulator 2, a pin pulling rod customizing anchor ear 3, a U-shaped clamp 4, a herringbone rod customizing anchor ear 5, a waterproof plug 6, a nylon insulating tube 7, a box body 8, an OPGW cable frame 9, an OPGW optical cable 10, a first cable locking device 11, a first grounding wire 12, an insulating isolation plate 13, a grounding disconnecting link 14, an optical fiber direct melting disc 15, a wire arranging plate 16, an optical cable fixing seat 17, a common optical cable 18, a residual cable box base 19, a gate-shaped framework 20, a second grounding wire 21, a third grounding wire 22, a high-voltage arc striking rod 23, an outer sleeve umbrella skirt 24, a low-voltage arc striking rod 25, a cable passing hole 26, a discharge ball 27 and a second cable locking device 28.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-8, an insulated and landed residual cable box for a cable feeding on a transformer substation comprises a box body 8 and an OPGW optical cable downdraw device, wherein an OPGW optical cable 10 enters the box body 8 from the top of a door-shaped framework 20 through the OPGW optical cable downdraw device, the box body 8 is arranged at the bottom of the door-shaped framework 20, the OPGW optical cable downdraw device comprises an OPGW voltage limiting device 1 and a fixing device, the OPGW voltage limiting device 1 is arranged at the top of the door-shaped framework 20, a needle insulator 2 is arranged on the fixing device, the OPGW optical cable 10 is arranged on the needle insulator 2 and the voltage limiting device 1, a first grounding wire 12 is connected to the OPGW voltage limiting device 1, and the other end of the first grounding wire 12 is connected with the door-shaped framework 20; the OPGW voltage limiting device 1 performs voltage limiting discharge on lightning induced electricity and induced electricity in a transformer substation. The first grounding wire 12 is arranged on the OPGW voltage limiting device 1, so that the reliability of grounding is guaranteed, the OPGW optical cable 10 is arranged on the needle insulator 2, the reliable insulation between the OPGW optical cable and the door type framework 20 is effectively guaranteed, and the OPGW optical cable voltage limiting device is used in an outdoor environment, and the service life is longer than 25 years.
The cable feeding hole is formed in one side of the top of the box body 8, the nylon insulating tube 7 is arranged on the cable feeding hole, the waterproof plug 6 is arranged at the upper end of the nylon insulating tube 7, the first cable locking device 11 is arranged in the box body 8 and close to the cable feeding hole, the second grounding wire 21 is connected to the first cable locking device 11, the grounding disconnecting link 14 is arranged at the bottom of the box body 8, the grounding disconnecting link 14 is connected with the transformer substation grounding grid through the grounding wire, the second grounding wire 21 is connected with the grounding disconnecting link 14, the insulating isolation plate 13 is arranged in the box body 8, the OPGW cable frame 9 is arranged on one side of the insulating isolation plate 13, the cable passing hole 26 is formed in one side of the insulating isolation plate 13, the second cable locking device 28 is arranged at the position, close to the cable passing hole 26, of the other side of the insulating isolation plate 13, the third grounding wire 22 is connected with the grounding disconnecting link 14, the back of the insulating isolation plate 13 is provided with the optical fiber direct-melting disc 15 and the optical cable fixing seat 17, the bottom of the box 8 is provided with the hollow residual cable bottom seat 19, and the bottom and the top of the residual cable box seat 19 are both provided with through holes. OPGW optical cable 10 gets into box 8 inside from nylon insulating tube 7, OPGW draws down the cable and does not need to go into the cable duct and gets into the box, the insulating tube material that OPGW optical cable passed has been saved, it is coiled on OPGW dish cable frame 9 again through first cable locking device 11, its tip passes through cable hole 26 and gets into the back of insulating division board 13, and through second cable locking device 28, OPGW optical cable 10 strips out the steel core aluminium stranded conductor, the optical fiber unit of taking the stainless steel pipe gets into optic fibre straight melting dish 15 and the welding of the ordinary optical cable 18 of transformer substation's computer lab, ordinary optical cable 18 gets into from the through-hole of surplus cable case bottom 19 bottom, redundant cable dish exists surplus cable case bottom 19 inside, it is fixed to get into box 8 to pass through cable fixing base 17 again, ordinary optical cable 18 removes the steel core aluminium stranded conductor, the optical fiber unit of taking the stainless steel pipe gets into optic fibre straight melting dish 15. The second grounding wire 21 and the third grounding wire 22 are connected with the transformer substation grounding network through the grounding disconnecting link 14, so that the reliability of grounding is guaranteed, and when the annual insulation supervision detection of the transformer substation OPGW and the resistance detection of the transformer substation grounding network are performed, only the grounding disconnecting link switch inside the insulation residual cable box is required to be disconnected, and after the test is finished, the grounding disconnecting link switch is closed, so that the testing time is saved, the power failure loss is reduced, the maintenance is convenient, and the risk of pole climbing operation is avoided.
The box body 8, the OPGW cable rack 9 and the insulating isolation plate 13 are made of insulating SMC materials or epoxy resin plates, so that the insulating effect of the optical cable is ensured.
The fixing device comprises pin pulling rod customizing hoops 3 which are equidistantly arranged on the upper portion of the door-shaped framework 20, U-shaped clamping devices 4 which are arranged in the middle of the door-shaped framework 20 and herringbone rod customizing hoops 5 which are equidistantly arranged on the lower portion of the door-shaped framework 20, the pin pulling rod customizing hoops 3 and the herringbone rod customizing hoops 5 comprise two semicircular hoops and an installation frame, the OPGW voltage limiting device 1 and the needle insulator 2 are fixed on the installation frame, and the two semicircular hoops are connected through two connecting bolts.
The voltage limiting device 1 comprises a high-voltage arc striking rod 23 and a low-voltage arc striking rod 25 which are parallel to each other, a plurality of outer cover umbrella skirts 24 are arranged outside the high-voltage arc striking rod 23 at equal intervals, discharge balls 27 are arranged at the end parts of the high-voltage arc striking rod 23 and the low-voltage arc striking rod 25, one end of the high-voltage arc striking rod 23 is connected with the first grounding wire 12, and the OPGW optical cable 10 is fixed at the other end of the high-voltage arc striking rod 23.
The back of the insulating isolation plate 13 is also provided with a wire arranging plate 16, a plurality of wire binding grooves are formed in the wire arranging plate 16, and the wire arranging plate 16 is provided with a movable cover plate through bolts. The wire management plate 16 mainly plays a role in managing and protecting the optical cables.
The earthing knife-switch 14 comprises a knife-switch and two connectors, the two connectors are connected in series, the two connectors are connected with the ground wire through the knife-switch, the second ground wire 21 is connected with one connector, and the third ground wire 22 is connected with the other connector. The switch blade is connected with the grounding wire and disconnected with the grounding wire when being separated.
Working principle: the OPGW optical cable 10 is arranged on the needle insulator 2, reliable insulation between the OPGW optical cable and the door type framework 20 is effectively guaranteed, the OPGW voltage limiting device 1 carries out voltage limiting discharge on lightning induced electricity and induced electricity in a transformer substation, the OPGW voltage limiting device 1 is grounded through the first grounding wire 12, the OPGW optical cable 10 enters the inside of the box body 8 from the nylon insulating tube 7, then enters the optical fiber direct melting disc 15 to be welded with the common optical cable 18 of a transformer substation machine room, the second grounding wire 21 and the third grounding wire 22 are connected with the transformer substation grounding network through the grounding disconnecting link 14, the reliability of grounding is guaranteed, and meanwhile, the maintenance is convenient.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides an insulating surplus cable case that falls to ground of cable of going up of transformer substation, includes box (8) and OPGW optical cable downdraw device, and OPGW optical cable (10) are through OPGW optical cable downdraw device from door frame (20) top entering box (8), and box (8) are established in the bottom of door frame (20), its characterized in that: the OPGW optical cable downdraw device comprises an OPGW voltage limiting device (1) and a fixing device, wherein the OPGW voltage limiting device (1) is arranged at the top of a door-shaped framework (20), a needle insulator (2) is arranged on the fixing device, an OPGW optical cable (10) is arranged on the needle insulator (2) and the voltage limiting device (1), a first grounding wire (12) is connected to the voltage limiting device (1), and the other end of the first grounding wire (12) is connected with the door-shaped framework (20);
the utility model discloses a cable-feeding device, including box (8) and cable-feeding device, box (8) top one side is equipped with into cable hole, is equipped with nylon insulating tube (7) on the cable hole, nylon insulating tube (7) upper end is equipped with waterproof end cap (6), be close to into cable hole department in box (8) and be equipped with first lock cable device (11), be connected with second earth connection (21) on first lock cable device (11), box (8) bottom is equipped with ground knife switch (14), ground knife switch (14) are connected with transformer substation's ground net through the earth connection, second earth connection (21) are connected with ground knife switch (14), be equipped with insulating division board (13) in box (8), one side of insulating division board (13) is equipped with OPGW dish cable frame (9), one side of insulating division board (13) is equipped with cable-passing hole (26), the other side of insulating division board (13) is close to cable-passing hole (26) department and is equipped with second lock cable device (28), be connected with third earth connection (22) on second lock cable device (28), third earth connection (22) are equipped with ground connection (19) and cable connection (13) bottom half (19) are equipped with insulating base (17), the bottom and the top of the residual cable box base (19) are respectively provided with a through hole;
the fixing device comprises pin pulling rod customizing hoops (3) which are equidistantly arranged on the upper portion of the door-shaped framework (20), U-shaped clamps (4) which are arranged in the middle of the door-shaped framework (20) and herringbone rod customizing hoops (5) which are equidistantly arranged on the lower portion of the door-shaped framework (20), the pin pulling rod customizing hoops (3) and the herringbone rod customizing hoops (5) comprise two semicircular hoops and a mounting frame, the OPGW voltage limiting device (1) and the needle insulator (2) are both fixed on the mounting frame, and the two semicircular hoops are connected through two connecting bolts;
OPGW voltage limiting device (1) is including high-pressure striking stick (23) and low pressure striking stick (25) that are parallel to each other, a plurality of overcoat umbrella skirt (24) have been arranged to the outer equidistance of high pressure striking stick (23), the tip of high pressure striking stick (23) and low pressure striking stick (25) all is equipped with discharge ball (27), the one end and the first earth connection (12) of high pressure striking stick (23) are connected, OPGW optical cable (10) are fixed at the other end of high pressure striking stick (23).
2. The insulated and landed residual cable box for cable feeding on a transformer substation according to claim 1, wherein: the back of the insulating isolation plate (13) is also provided with a wire arranging plate (16), the wire arranging plate (16) is provided with a plurality of wire binding grooves, and the wire arranging plate (16) is provided with a movable cover plate through bolts.
3. The insulated and landed residual cable box for cable feeding on a transformer substation according to claim 1, wherein: the grounding disconnecting link (14) comprises a disconnecting link and two connectors, the two connectors are connected in series, the two connectors are connected with the ground wire through the disconnecting link, the second grounding wire (21) is connected with one connector, and the third grounding wire (22) is connected with the other connector.
4. The insulated and landed residual cable box for cable feeding on a transformer substation according to claim 1, wherein: the box body (8), the OPGW cable rack (9) and the insulating isolation plate (13) are made of insulating SMC materials or epoxy resin plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071747.XA CN106842448B (en) | 2017-02-09 | 2017-02-09 | Insulating surplus cable case that falls to ground of cable that advances on transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071747.XA CN106842448B (en) | 2017-02-09 | 2017-02-09 | Insulating surplus cable case that falls to ground of cable that advances on transformer substation |
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| Publication Number | Publication Date |
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| CN106842448A CN106842448A (en) | 2017-06-13 |
| CN106842448B true CN106842448B (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710071747.XA Active CN106842448B (en) | 2017-02-09 | 2017-02-09 | Insulating surplus cable case that falls to ground of cable that advances on transformer substation |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429213A (en) * | 2018-05-20 | 2018-08-21 | 新能量科技股份有限公司 | A kind of primary steel band hoop bracket |
| CN108693433A (en) * | 2018-05-20 | 2018-10-23 | 新能量科技股份有限公司 | A kind of ground-wire monitoring instrument |
| CN110589628A (en) * | 2018-06-13 | 2019-12-20 | 国网辽宁省电力有限公司营口供电公司 | Integrated device for storage, carrying and field detection of insulating rope |
| CN108572423A (en) * | 2018-07-17 | 2018-09-25 | 国网山西省电力公司忻州供电公司 | Substation divides cable frame more than cable type OPGW |
| CN109245008A (en) * | 2018-11-26 | 2019-01-18 | 国网山东省电力公司信息通信公司 | OPGW optical cable draws lower device and construction technology at a kind of substation architecture |
| CN113824080B (en) * | 2021-09-23 | 2023-12-22 | 中电联电力发展研究院有限公司 | Device and method for releasing tensile stress of transformer substation cable |
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| CN205176349U (en) * | 2015-11-26 | 2016-04-20 | 中国能源建设集团江苏省电力设计院有限公司 | Embedded OPGW optical cable termination case of indoor transformer substation |
| CN206431335U (en) * | 2017-02-09 | 2017-08-22 | 新能量科技股份有限公司 | A kind of enterprising remaining cable case of cable insulation landing of transformer station |
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| JP2008233695A (en) * | 2007-03-22 | 2008-10-02 | Chugoku Electric Power Co Inc:The | Splicing box for opgw and method of splicing opgw |
| CN202929258U (en) * | 2012-08-29 | 2013-05-08 | 谢琪超 | Disconnectable grounding type optical cable cross-connecting box |
| CN103048747A (en) * | 2012-12-17 | 2013-04-17 | 绍兴电力局 | Optical cable cross-connecting box with isolated base |
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| CN206431335U (en) * | 2017-02-09 | 2017-08-22 | 新能量科技股份有限公司 | A kind of enterprising remaining cable case of cable insulation landing of transformer station |
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| CN106842448A (en) | 2017-06-13 |
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