CN204882632U - Multi -functional electric test terminal box of joining in marriage - Google Patents
Multi -functional electric test terminal box of joining in marriage Download PDFInfo
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- CN204882632U CN204882632U CN201520641183.5U CN201520641183U CN204882632U CN 204882632 U CN204882632 U CN 204882632U CN 201520641183 U CN201520641183 U CN 201520641183U CN 204882632 U CN204882632 U CN 204882632U
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- 238000012360 testing method Methods 0.000 title claims abstract description 107
- 238000005304 joining Methods 0.000 title abstract description 3
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- 238000002788 crimping Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 16
- 238000013522 software testing Methods 0.000 abstract 1
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- 229910052802 copper Inorganic materials 0.000 description 21
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
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- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
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- 230000003252 repetitive effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
Abstract
The utility model discloses a multi -functional electric test terminal box of joining in marriage, including box, incoming wire terminal group and operation terminal group, the square box of box for being formed by connecting the multi -disc insulation board, incoming wire terminal group sets up on a face of box, and the setting of operation terminal is on other faces of box, incoming wire terminal organizes a, b, c congruence N terminal and ground terminal including the A of high -pressure side, B, C phase terminal, low tension side, incoming wire terminal group links to each other through the power equipment of wire with the examination of awaiting measuring, operation terminal group links to each other with the equipment of being tested through special test lead, a, b, c congruence N terminal and ground terminal including the A of high -pressure side, B, C phase terminal, low tension side are organized to the operation terminal, incoming wire terminal connects with operation terminal one -to -one in the box, should join in marriage the electric test terminal box, easy to carry out simple to use, efficiency of software testing is high.
Description
Technical field
The utility model relates to a kind of Multifunctional power distribution test connecting box.
Background technology
Along with development and the expansionism in city, power circuit and consumer are also in index growth doubly, and controller switching equipment testing crew is not significantly increased, and testing crew per capita absorb workload is tending towards saturated gradually.For a control log equipment gate of the quality monitoring, just require that power equipment testing crew carries out testing and operating in strict accordance with testing regulations, and within a short period of time completes test.
Distribution net equipment is varied, and often kind of equipment different tests or same test all must the repeatedly change trial modes of connection, bring a large amount of repetitive operation to staff, is the bottleneck hindering lifting test efficiency.At present, distribution net equipment tests the testing crew of minimum needs more than 3, and wherein a people is responsible for the change of the duration of test mode of connection, and a people is responsible for operation, and another people is responsible for monitoring.Controller switching equipment high-potting project is numerous, such as: tens of items such as ac voltage withstanding, insulation resistance test, no-load voltage ratio, Dielectric Loss Test, each test is all independent test apparatus and independent test wire, needs wiring personnel repeatedly to travel to and fro between change trial line mode between tested device and instrument.
Secondly, controller switching equipment installation environment is complicated, and some equipment is arranged on high-altitude, and some is arranged on relatively airtight small space, and collection dirty collection dirt is more, and personnel are difficult to enter and guarantee that wiring is firm, and be unfavorable for experiment work industry, security risk is large.Personnel activity easily causes airborne dust, is in this environment for a long time, is also very big infringement to the physical and mental health of personnel.
In existing distribution test process, equipment under test (as transformer etc.) and test apparatus is directly connected by cable, and, when cable connects equipment under test, operating personnel are needed to climb to the enterprising line operate of equipment under test, if change wiring, need again to climb on equipment under test and change connection plan, due to equipment under test primary side electric pressure higher (being generally more than 10kV), thus bring larger dangerous hidden danger to operating personnel, and every wiring once, occurs that the chance of peril just increases once.Now, existing distribution experimental technique danger is higher, and wiring is loaded down with trivial details, and efficiency is low, is unfavorable for the carrying out tested.
Therefore, have and will design a kind of novel Multifunctional power distribution test connecting box.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of Multifunctional power distribution test connecting box, and this Multifunctional power distribution test connecting box, easy to implement, testing efficiency is high.
The technical solution of utility model is as follows:
A kind of Multifunctional power distribution test connecting box, comprises casing, end of incoming cables subgroup and operating side subgroup;
Casing is the square box be formed by connecting by multi-disc insulcrete;
End of incoming cables subgroup is arranged on a face of casing, and operating side subgroup is arranged on other faces of casing;
End of incoming cables subgroup comprises on high-tension side A, B, C phase terminal, a, b, c phase of low-pressure side and N terminal (i.e. neutral terminal);
End of incoming cables subgroup is connected with power equipment to be tested by wire (special wire);
Operating side subgroup is connected with the instrument for testing by wire (special wire);
Operating side subgroup comprises on high-tension side A, B, C phase terminal, a, b, c phase of low-pressure side and N terminal;
Input terminal and operation terminal connect one to one in casing, namely correspondingly connect with wire.
End of incoming cables subgroup also comprises ground terminal;
Described on high-tension side electric pressure is 10kV-32kV;
The electric pressure of described low-pressure side is 220V-380V;
Terminal in end of incoming cables subgroup and operating side subgroup is fixed on insulcrete, and the nut that described terminal comprises bolt and coordinates with bolt, the front end of bolt has the jack for inserting plug.
Described operating side subgroup is arranged on the same side.
In the panel at subgroup place, end of incoming cables, ground terminal is positioned at middle part, and other terminals are arranged around ground terminal;
In the panel at leading-out terminal subgroup place, on high-tension side terminal is positioned at side, and low-pressure side terminal is positioned at opposite side; The advantage of such process: in the panel at leading-out terminal subgroup place, on high-tension side terminal is positioned at side, and low-pressure side terminal is positioned at opposite side.Avoid high electric signal to seal in low-voltage circuit, cause measurement out of true, avoid causing damage to electrical equipment.
The outside of casing is also provided with one for drawing over to one's side the cable containing box of cable.
The bottom of casing is provided with at least 2 rollers, casing has Telescopic handle mechanism.
The terminal of end of incoming cables subgroup is docked with the terminal in the subgroup of operating side by wire, and terminal and wire are by being connected in crimping mode based on hollow tubular and solid rod construction.The thickness of insulcrete is 20-30mm.
Terminal in end of incoming cables subgroup and operating side subgroup adopts the nut [screw rod in bolt is cored screw or solid screw, and bolt head can be wing bolt head] having bolt and coordinate with bolt be fixed on insulcrete;
Guidance panel terminal and outgoing line side terminal.
The length 80mm of the bolt of guidance panel terminal, the bolt length of low-pressure side terminal is 65mm; The bolt length of inlet wire side signal input terminal is 180mm;
Box sizes is 600mm × 350mm × 250mm, and cable containing box is of a size of 200mm × 350mm × 250mm; The thickness of insulcrete is 25mm.
The terminal of power equipment in use, using terminal box as switching device, is connected with the end of incoming cables subgroup of terminal box by wire, leading-out terminal subgroup is connected with the instrument being used for testing by wire by this terminal box; By instrument, power equipment is tested;
The outside of switching device upper box is also provided with one for drawing over to one's side the cable containing box of cable;
The bottom of casing is provided with at least 2 rollers, casing has Telescopic handle mechanism.
Terminal in end of incoming cables subgroup and operating side subgroup adopts the nut having bolt and coordinate with bolt be fixed on insulcrete, and the screw rod in bolt is cored screw or solid screw, and bolt head can be wing bolt head.
The length 80mm of the bolt of guidance panel terminal, the bolt length of low-pressure side terminal is 65mm; The bolt length of signal input terminal is 180mm;
Box sizes is 600mm × 350mm × 250mm, and cable containing box is of a size of 200mm × 350mm × 250mm; The thickness of insulcrete is 25mm.
Multifunctional power distribution test connecting box adopts Portable suitcase with pull rods to design on the whole, and entirety is made up of two parts, is chamber and cable containing box respectively.Wherein, test casing is of a size of 600mm × 350mm × 250mm, adopts air insulation.Cable containing box is of a size of 200mm × 350mm × 250mm.
For the needs of the satisfied different mode of connection, multifunction test terminal box guidance panel is designed to one group of high pressure input terminal, one group of low pressure input terminal and a casing electrical grounding pole (ground terminal).Connection terminal (hole) on guidance panel is designed to plug-in, and according to different test connection figure, operator adopts Special wiring to realize the replacing of the mode of connection on panel.
High-voltage signal input terminal adopts single-phase type, and [namely triple-phase line independently.], three-phase is independent.Low pressure input terminal (hole) adopts the outstanding design of cylindrical, Triangle ID, guarantees core one_to_one corresponding, avoids wiring error occurs.
High-voltage signal input line adopt respectively three independently cable connect, cable connect equipment under test one end adopt alligator forceps, facilitate test connection; The cable other end is connected with solid copper bar, and copper rod length is 150mm, and cross section is 100mm
2above, every root length of cable is 10 meters.High side voltage grade is 10kV-32KV.
Low-voltage signal input line adopts the three-phase and four-line low-voltage cable with signal shielding layer, and connect equipment under test one end and adopt alligator forceps, facilitate test connection, the low-voltage cable cable other end is connected with high pressure aviation plug.Type low-voltage cable total length is 10 meters.Low-pressure side electric pressure is 220V-380V.
High-voltage signal input line adopt respectively three independently cable connect, cable connect equipment under test one end adopt alligator forceps, alligator forceps is connected with tested arrangement terminal respectively; The cable other end is connected with solid copper bar, and copper rod shows to be connected with terminal box (grafting) mutually according to correspondence.
At junction box, the connection between each terminal is as follows:
Casing connection wire adopts sectional area to be not less than 6mm
2copper core shielding insulation line, mutual intersection is avoided in wiring in casing, fixed, the wiring of height line ball subregion.
Adopt crimping to connect, connect and should not be less than 30mm, and each joint has plural crimping mouth at least.After interface polishes smooth, docking port place restoring signal screen layer and insulation course.
Using method:
1, Work tool prepares: [wiring is the test connection coordinated with this equipment to each two groups of Special test wiring of Multifunctional power distribution test connecting box, high and low pressure.], ground wire, 10kV insulating glove, conventional test instrument and equipment etc.
2, work flow:
(1) guarantee that tested device has had a power failure and checked its electric discharge, the reliable effective grounding of terminal box earthing pole;
(2) according to the requirement of tested device pilot project, the industrial siding wire clamp clamping electric termination of tested device is adopted, industrial siding other end thereto;
(3) according to the pilot project mode of connection, to have gone out to drill the corresponding mode of connection in terminal block panel, and confirmed errorless.
(4) test apparatus equipment output end is connected with corresponding ports in terminal block panel, carries out electrical test to tested device.
Beneficial effect:
Multifunctional power distribution test connecting box of the present utility model, the HV Terminal of equipment under test and low-voltage terminal are all guided on the casing comprising multiple connection terminal, have again and be connected with testing tool by the terminal on casing, and casing is as the terminal (platform) of wiring, follow-up test need only be carried out for each terminal on casing, even if need to change wiring, also need not climb to equipment under test again to get on operation, thus facilitate operating personnel significantly, improve testing efficiency, its processing safety have also been obtained great lifting.
In addition, the utility model devises cable containing box, and like this, relevant connection cable all can be accommodated in this cable containing box, and practicality is good.
Further, terminal box makes draw-bar box pattern, is easy to carry and moves.
Concrete advantage applies of the present utility model exists:
(1) what realize controller switching equipment conventional test once disconnects line, promotes distribution experiment work efficiency 60%.
By Multifunctional power distribution test connecting box, the connection terminal of tested device is guided into near-end, the operation interface of terminal box realizes change the different modes of connection, what realize test once disconnects line.Testing crew, by three original people, can be reduced to two people, and a people is responsible for change trial wiring on the spot, and a people is responsible for safety supervision, and the time changing the mode of connection, by original 30 minutes, can be reduced to 15 minutes, and work efficiency promotes more than 60%.
(2) improve testing ground safety coefficient, alleviate intensity of workers, improve working environment.
Staff changed the wiring working time by original 30 minutes in equipment installation site, shorten to 5 minutes, safety coefficient improves 83%.Realize once disconnecting line by multifunction test terminal box, alleviate intensity of workers.Distribution net equipment installation environment is complicated, narrow space, and collection dirty collection dirt is more, and staff is in this environment for a long time, is unfavorable for that personnel are healthy.Realize converting the mode of connection on the spot by multifunction test terminal box, working environment improves.
Generally speaking, terminal box is also known as Multifunctional power distribution test connecting box, structure is simple, quality is light and handy, easy to operate, reduce the activity duration of the artificial wiring that different tests project produces, the whole experiment work time can not only be shortened, increase work efficiency, also mitigate the labour intensity of operating personnel, save human resources, ensure the safety of operating personnel to greatest extent.This Multifunctional power distribution test connecting box, easy to implement, practicality is good, can provide great facility, and greatly reduce the danger of test for distribution test.
Accompanying drawing explanation
Fig. 1 is inlet wire side (input terminal panel) structural representation of Multifunctional power distribution test connecting box;
Fig. 2 is guidance panel schematic diagram [terminal on guidance panel is outlet terminal];
Fig. 3 is ground terminal schematic diagram;
Fig. 4 is guidance panel terminal (jack) structural representation;
Fig. 5 is input terminal (input terminal) schematic diagram.
Label declaration: 1-casing, 2-cable containing box, 3-insulcrete, 4-hollow copper tubing, 5-wing bolt head, 6-crimp segment, 7-solid copper bar.
Embodiment
Below with reference to the drawings and specific embodiments, the utility model is described in further details:
Embodiment 1:
As Figure 1-5, substation transformer AC voltage withstand test project, needs high-voltage pile to draw, low lamination shoe short circuit ground connection.High-voltage pile Special test line draws lower transformer, receives multifunction test terminal box high pressure end of incoming cables, and low-pressure side also adopts low pressure Special wiring to draw lower transformer, is connected to multifunction test terminal box low pressure end of incoming cables.Testing crew only need once to crawl into transformer bay every, corresponding test wire is drawn to get off, and carries out corresponding insulation measures and safety practice, whole mistake is no more than 5 minutes, and operating personnel just can get back to instrument and meter and carry out patching operations.Alternate withstand voltage test, relatively withstand voltage test, fracture withstand voltage test just can be realized, the series of experiments projects such as casing insulation test by changing the mode of connection on multifunctional wire box panel.
Tested by reality, having three class connecting lines needs to design, respectively: casing connection wire, and signal inlead and operation connecting line.Consider and reduce interference as far as possible, the accuracy of lifting test data, above three kinds of lines all adopt the High-Voltage Insulation signal wire containing copper core ribbon screen layer.Connecting line wire rod requires as follows:
1. casing connection wire, core is minimum should not be less than 6m
2.
2. signal inlead is divided into hi-line and low-voltage line.
High-voltage signal input line core should not be less than 6m
2, low-voltage signal input line should not be less than 2m
2.
3. operate connecting line core and should not be less than 2.1m
2.
1. casing connection wire
Casing connection wire adopts sectional area to be not less than 6m
2copper core shielding insulation line, mutual intersection is avoided in wiring in casing, fixed, the wiring of height line ball subregion.
2. signal input line
High-voltage signal input line adopt respectively three independently cable connect, cable connect by side apparatus one end adopt alligator forceps, facilitate test connection; The cable other end is connected [when being connected, being directly plugged in the hole in input terminal, the movable grafting that namely can plug] with solid copper bar, and copper rod length is 150mm, and cross section is 100mm
2above, every root length of cable is 10 meters.
Low-voltage signal input line adopts the three-phase and four-line low-voltage cable with signal shielding layer, and connect and adopted alligator forceps by equipment one end, facilitate test connection, the low-voltage cable cable other end is connected with high pressure aviation plug.Type low-voltage cable total length is 10 meters.
3. operate connecting line
Operation connecting line core should not be less than 6m
2copper core shielding insulation line, company's section of line is plug (contact pin).
4. the end of a thread Joining Technology requirement
Adopt crimping to connect, connect (i.e. crimping length) and should not be less than 30mm, and each joint has plural crimping mouth at least.After interface polishes smooth, docking port place restoring signal screen layer and insulation course.
Described crimping refers to by the end of a thread difference in cored screw, then is flattened by the cored screw of crimp segment with Press Plier, cored screw is out of shape thus reaches the reliable effect connected.
(1) multifunction test terminal box cabinet design
Distribution test connecting box entirety adopts Portable suitcase with pull rods design, and entirety is made up of two parts, is chamber and cable containing case respectively.Wherein, test casing is of a size of 600mm × 350mm × 250mm, adopts air insulation.Cable containing case is of a size of 200mm × 350mm × 250mm.
Cabinet design mainly considers three parts such as guidance panel design, the design of test box inlet wire side and internal electrical design.Internal electrical design, under the principle guaranteeing enough electric insulation spacing, avoids crossing elimination, overlap.
For the needs of the satisfied different mode of connection, multifunction test terminal box guidance panel is designed to one group of high pressure inlet wire, one group of low pressure inlet wire and one, casing electrical grounding pole.Guidance panel wiring hole is designed to plug-in, and according to different test connection figure, operator adopts Special wiring to realize the replacing of the mode of connection on panel.Multifunction test terminal block panel design parameter designs, as Fig. 4.
The design of terminal box inlet wire side high pressure, each one group of the special entrance hole of low pressure, ground terminal one.High-voltage signal inlet wire adopts single stage type, and three-phase is independent.Low pressure entrance hole adopts cylindrical, and interior three hand over outstanding design, guarantee core one_to_one corresponding, wiring error do not occur.
The difficult point that this project is maximum, in the selection of major insulation material.Because discrete trial project demand equipment can bear more than 32kV voltage.Guaranteeing, under the prerequisite having enough electric insulation distances, to consider the portability of terminal box again, also will take into account the complexity of production and processing simultaneously.Through site test and the communication of growth manufacturing factory in earlier stage, determine that multifunction test terminal box major insulation adopts the epoxy resin that insulating property are superior, supplementary insulation adopts crosslinked polyethylene.
Test shows, 10kV Multifunctional power distribution test connecting box can realize a dismounting of controller switching equipment electrical test wiring, than in the past repeatedly repeat mounting or dismounting line operation, decrease the workload of electrical test personnel, reduce labour intensity, promote work efficiency more than 60%.Eliminate the potential safety hazard of electric equipment test, improve safety coefficient 83%, also effectively improve work operations environment simultaneously.
After this project is applied, its economic benefit and social benefit huge, year economic benefit more than 1,000,000 yuan, and the ability of power network safety operation and reliable power supply can be promoted, there is higher use value and promotional value.
Solid copper bar in Fig. 3 is also pressure connection terminal, and the length of the pressure connection terminal in this pressure connection terminal and Fig. 4 and Fig. 5 is 30mm.
The mode that solid copper bar in Fig. 3 is connected with wire is: one end of wire has the hollow copper tubing terminal for crimping, this solid copper bar is inserted in described hollow copper tubing terminal as male, again by solid copper bar together with hollow copper tubing terminal compression joint, complete connection.
In input terminal, the overall diameter of cored screw is 20mm, and diameter of bore is 15mm, the height of nut and nut is 5mm, the long 35m of screw thread, and bolt length (i.e. the total length of screw rod and nut) is 80mm, the back segment of bolt is hollow copper tubing, and crimp segment is 30mm;
Lead-out terminal (panel side terminal): the overall diameter of cored screw is 5mm, diameter of bore is 2.76mm, the height of nut and nut is 5mm, the long 35m of screw thread, bolt length (i.e. the total length of screw rod and nut) is 180mm, the back segment of bolt is hollow copper tubing, and crimp segment is 30mm;
In ground terminal, spiro rod length is 65mm, and screw diameter is 5mm, and the diameter in hole is 2.76mm, the long 35mm of screw thread.
Outside when connecting, all there is a jack (i.e. the through hole of hollow copper bar-also can be called copper pipe) in the outside of each terminal, and the wire end of outside is copper bar, is found in this jack by copper bar, completes grafting.
This casing, inner connection is all for being fixedly connected with (mainly adopting crimping), and the flexible connections such as the wiring tea plug-in of outside, like this, not only internal stability is good, and peripheral operation is very convenient.
The aviation plug of three lines unifications that what the input terminal of low pressure adopted is.
Claims (8)
1. a Multifunctional power distribution test connecting box, is characterized in that, comprises casing, end of incoming cables subgroup and operating side subgroup;
Casing is the square box be formed by connecting by multi-disc insulcrete;
End of incoming cables subgroup is arranged on a face of casing, and operating side subgroup is arranged on other faces of casing;
End of incoming cables subgroup comprises on high-tension side A, B, C phase terminal, a, b, c phase of low-pressure side and N terminal;
End of incoming cables subgroup is connected with power equipment to be tested by wire;
Operating side subgroup is connected with the instrument for testing by wire;
Operating side subgroup comprises on high-tension side A, B, C phase terminal, a, b, c phase of low-pressure side and N terminal;
Input terminal and operation terminal connect one to one in casing;
End of incoming cables subgroup also comprises ground terminal;
Described on high-tension side electric pressure is 10kV-32kV;
The electric pressure of described low-pressure side is 220V-380V;
Terminal in end of incoming cables subgroup and operating side subgroup is fixed on insulcrete, and the nut that described terminal comprises bolt and coordinates with bolt, the front end of bolt has the jack for inserting plug.
2. Multifunctional power distribution test connecting box according to claim 1, is characterized in that, described operating side subgroup is arranged on the same side.
3. Multifunctional power distribution test connecting box according to claim 2, is characterized in that, in the panel at subgroup place, end of incoming cables, ground terminal is positioned at middle part, and other terminals are arranged around ground terminal;
In the panel at leading-out terminal subgroup place, on high-tension side terminal is positioned at side, and low-pressure side terminal is positioned at opposite side.
4. Multifunctional power distribution test connecting box according to claim 1, is characterized in that, the outside of casing is also provided with one for drawing over to one's side the cable containing box of cable.
5. Multifunctional power distribution test connecting box according to claim 1, is characterized in that, the bottom of casing is provided with at least 2 rollers, casing has Telescopic handle mechanism.
6. Multifunctional power distribution test connecting box according to claim 1, is characterized in that, the terminal of end of incoming cables subgroup is docked with the terminal in the subgroup of operating side by wire, and terminal and wire are by being connected in crimping mode based on hollow tubular and solid rod construction.
7. the Multifunctional power distribution test connecting box according to any one of claim 1-6, is characterized in that, the thickness of insulcrete is 20-30mm.
8. Multifunctional power distribution test connecting box according to claim 7, is characterized in that, the length 80mm of the bolt of guidance panel terminal, and the bolt length of low-pressure side terminal is 65mm; The bolt length of inlet wire side signal input terminal is 180mm;
Box sizes is 600mm × 350mm × 250mm, and cable containing box is of a size of 200mm × 350mm × 250mm; The thickness of insulcrete is 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520641183.5U CN204882632U (en) | 2015-08-24 | 2015-08-24 | Multi -functional electric test terminal box of joining in marriage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520641183.5U CN204882632U (en) | 2015-08-24 | 2015-08-24 | Multi -functional electric test terminal box of joining in marriage |
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| CN204882632U true CN204882632U (en) | 2015-12-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182012A (en) * | 2015-08-24 | 2015-12-23 | 国网湖南省电力公司带电作业中心 | Distribution test method and wiring device |
| CN108046057A (en) * | 2017-12-20 | 2018-05-18 | 国家电网公司 | Cable reel |
-
2015
- 2015-08-24 CN CN201520641183.5U patent/CN204882632U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182012A (en) * | 2015-08-24 | 2015-12-23 | 国网湖南省电力公司带电作业中心 | Distribution test method and wiring device |
| CN108046057A (en) * | 2017-12-20 | 2018-05-18 | 国家电网公司 | Cable reel |
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