CN107196073A - Substation grounding device and ground stud - Google Patents
Substation grounding device and ground stud Download PDFInfo
- Publication number
- CN107196073A CN107196073A CN201710465515.2A CN201710465515A CN107196073A CN 107196073 A CN107196073 A CN 107196073A CN 201710465515 A CN201710465515 A CN 201710465515A CN 107196073 A CN107196073 A CN 107196073A
- Authority
- CN
- China
- Prior art keywords
- connecting plate
- plate
- ground stud
- ground
- riser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
- H02B5/01—Earthing arrangements, e.g. earthing rods
Abstract
The present invention relates to a kind of substation grounding device and ground stud, the ground stud includes connecting plate, stretch out plate and connecting ear, the connecting plate is flat, the stretching plate is L-shaped bending plate, the L-shaped bending plate includes the transverse slat and riser connected in angle, the one side of the connecting plate is connected with one end of the transverse slat and riser, the another side of the connecting plate is used to be connected with earthing bar, the one side of the riser is connected with the connecting ear, the connecting ear is provided with the first mounting hole, first mounting hole is used to install the first bolt lock immediately ground wire, the connecting plate, stretch out plate and connecting ear is integrally formed using aluminium alloy.The ground stud welded compared to tradition by steel or iron, can effectively reduce heating when induced-current flows through ground stud；Increase the contact area of ground stud and earthing bar, reduce the contact resistance between earthing bar and ground stud, further reduce heating when induced-current flows through ground stud, it is to avoid ablation, ground connection is reliable.
Description
Technical field
The present invention and substation grounding equipment, more particularly to a kind of substation grounding device and ground stud.
Background technology
Electrically setting for substantial amounts of power transformation, the high voltage electric equipment of transmission and disttrbution and other purposes is equiped with transformer station
It is standby, in order to prevent induced electricity and suddenly incoming call, it is ensured that the personal safety of staff, it is necessary to pacify the high voltage electric equipment of maintenance
Full reliable ground, the common electrical equipment grounding measure of current power system has conjunction grounding switch and hangs two kinds of temporary ground wire.
Operating experience shows, if only hanging earthing conductor does not conform to grounding switch during line maintenance, the induced-current that ground wire flows through up to 100A,
Traditional ground stud easily generates heat when flowing through larger induced-current, or even ablation, causes ground connection unreliable, has seriously threatened the person
Safety and equipment safety.
The content of the invention
Based on this, the invention reside in the defect for overcoming prior art, there is provided a kind of substation grounding device and ground stud, energy
Ground stud heating ablation is effectively prevented, ground connection is reliable.
A kind of ground stud, including connecting plate, stretching plate and connecting ear, the connecting plate are flat, and the stretching plate is L
Shape bending plate, the L-shaped bending plate includes the transverse slat and riser connected in angle, the one side of the connecting plate and the transverse slat and
One end connection of riser, the another side of the connecting plate is used to be connected with earthing bar, and the one side of the riser connects with described
Line ear is connected, and the connecting ear is provided with the first mounting hole, and first mounting hole is used to install the first bolt lock immediately ground wire,
The connecting plate, stretching plate and connecting ear are integrally formed using aluminium alloy.
Its further technical scheme is as follows：
The end of the transverse slat and riser is connected with the side of the connecting plate by the first arc transition, the transverse slat with
Riser is connected by the second arc transition.
The tensile strength of the ground stud is more than 205MPa, and offset yield strength is more than 170MPa.
The connecting plate is provided with the second mounting hole, and second mounting hole, which is used for the second bolt of installation, locks connecting plate
On line bank.
Described to stretch out the bottom that plate is arranged on the connecting plate, the top of the connecting plate is installed provided with two described second
Arranged for interval above and below hole, two the second mounting holes.
The area of the connecting plate is more than the area of the stretching plate.
The transverse slat is mutually perpendicular to riser, the connecting plate respectively with the transverse slat, riser is vertical is connected, the wiring
Ear is arranged on the one end of the riser away from the connecting plate.
A kind of substation grounding device, including earthing bar, ground wire and the ground stud, the side of the connecting plate is sticked
Pressure is provided with corrosion resistant transition piece on the line bank, and between connecting plate and line bank, and the corrosion resistant transition piece connects with connecting plate
The material of tactile side is identical with the material of the connecting plate, the material for the side that the corrosion resistant transition piece is contacted with line bank with
The material of the line bank is identical, and the ground wire is locked on the connecting ear by the first nut and the first bolt.
Its further technical scheme is as follows：
The corrosion resistant transition piece is iron aluminium transition plate.
Holddown spring is arranged with first bolt, the holddown spring is located between the first nut and ground wire.
The advantage or principle to preceding solution are illustrated below：
Above-mentioned ground stud, its connecting plate, stretching plate and connecting ear are integrally formed using aluminium alloy, compared to tradition by steel or iron
The ground stud of welding, it is to avoid welding procedure, reduces loop overall electrical resistance, when flowing through ground stud so as to effectively reduce induced-current
Heating；And setting is connected in the connecting plate of flat with earthing bar, the contact area of increase ground stud and earthing bar reduces
Contact resistance between earthing bar and ground stud, further reduces heating when induced-current flows through ground stud, it is to avoid ablation, connects
Ground is reliable；Plate will be stretched out simultaneously and is set to L-shaped bending plate, and the wherein side of riser is used to set connecting ear, and ground wire is by setting
The first bolt and the first nut put in the first mounting hole are locked on connecting ear, and transverse slat is used to set lockset.
Above-mentioned substation grounding device, using the integrally formed ground stud of aluminium alloy, it is to avoid welding procedure, reduction loop is whole
Bulk resistor, can effectively reduce heating when induced-current flows through ground stud；And setting is in the connecting plate and earthing bar of flat
The contact area of connection, increase ground stud and earthing bar, reduces the contact resistance between earthing bar and ground stud, further reduces
Induced-current flows through heating during ground stud, it is to avoid ablation, and ground connection is reliable；Pressure is provided with anti-between connecting plate and line bank simultaneously
Rotten transition plate, prevents electrochemical corrosion.
Brief description of the drawings
Fig. 1 is the structural representation of ground stud described in the embodiment of the present invention；
Fig. 2 is the structural representation of lockset.
Description of reference numerals：
1st, cross bar, 100, line bank, 10, connecting plate, the 101, first circular arc, 20, stretch out plate, the 202, second circular arc, 210,
Transverse slat, 220, riser, 30, connecting ear, the 40, first bolt, the 50, second bolt, 60, holddown spring.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the better embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make to understand more the disclosure
Plus it is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element be referred to as " directly existing " another element " on " when,
In the absence of intermediary element.Term as used herein " vertically ", " level ", "left", "right" and similar statement are
For illustrative purposes, it is unique embodiment to be not offered as.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more
The arbitrary and all combination of related Listed Items.
As shown in figure 1, a kind of ground stud, including connecting plate 10, stretching plate 20 and connecting ear 30, the connecting plate 10 is flat
Flat board, the stretching plate 20 is L-shaped bending plate, and the L-shaped bending plate includes the transverse slat 210 connected in angle and riser 220, described
The one side of connecting plate 10 is connected with one end of the transverse slat 210 and riser 220, the another side of the connecting plate 10 be used for
Earthing bar is connected, and the one side of the riser 220 is connected with the connecting ear 30, and the connecting ear 30 is installed provided with first
Hole, first mounting hole is used to install the first bolt 40 locking ground wire, the connecting plate 10, stretching plate 20 and connecting ear 30
It is integrally formed using aluminium alloy.
Above-mentioned ground stud, its connecting plate 10, is stretched out plate 20 and connecting ear 30 and is integrally formed using aluminium alloy, compared to tradition by
Steel or the ground stud of iron welding, it is to avoid welding procedure, reduce loop overall electrical resistance, flow through so as to effectively reducing induced-current and connect
Heating during pile；And setting is connected in the connecting plate 10 of flat with earthing bar, contact of the increase ground stud with earthing bar
Area, reduces the contact resistance between earthing bar and ground stud, further reduces heating when induced-current flows through ground stud, keeps away
Unburned erosion, ground connection is reliable；It is in 90 ° that plate 20 will be stretched out simultaneously to be set to riser 220 and transverse slat 210 in L-shaped bending plate, the present embodiment
Angle is connected, and wherein the side of riser 220 is used to set connecting ear 30, ground wire by be arranged in the first mounting hole first
The nut of bolt 40 and first is locked on connecting ear 30, and transverse slat 210 is used to set lockset as shown in Figure 2, the lockset
Cross bar 1 is used to keep off above the first nut, plays a part of locking the first nut, the first nut refers to matches somebody with somebody with first bolt 40
The nut of conjunction.
As shown in figure 1, the end of the transverse slat 210 and riser 220 and the side of the connecting plate 10 use the first circular arc
101 transition are connected, and the transverse slat 210 is connected with riser 220 using the transition of the second circular arc 202.Two can effectively be increased by so setting
The area of passage of individual corner position, reduces the resistance of ground stud, further reduces heating when induced-current flows through ground stud
The fusing point of ground stud described in the present embodiment is up to 655 DEG C, it is sufficient to ensure non-fusible when ground stud is overheated；It is described to connect
The tensile strength of pile is more than 205MPa, and offset yield strength is more than 170MPa, is enough to protect when operations staff assembles and disassembles ground stud
Card does not damage ground stud and ground wire；And indeformable, material is fine and close intact with corrosion resistance is fabulous, toughness is high, after processing
The features such as falling into.
As shown in figure 1, the connecting plate 10 is provided with the second mounting hole, second mounting hole is used to install the second bolt
50 make connecting plate 10 be locked on line bank 100.Traditional ground stud is directly welded on earthing bar, is only connected by solder side,
Contact area is very small, and along with being welding procedure, junction resistance ratio is larger；Connecting plate 10 uses second described in the present embodiment
Bolt 50 is directly locked on earthing bar, without welding, and the increase of both contacts area is a lot, and contact resistance is greatly reduced, simultaneously
Improve construction and installation convenience.The bottom that plate 20 is arranged on the connecting plate 10, the connecting plate 10 are stretched out described in the present embodiment
Top provided with two second mounting holes, arranged for interval above and below two the second mounting holes, in this way, being on the one hand easy to dress
If ground wire is on ground stud, sufficiently large space of on the other hand stepping down out, two the second bolts arranged for interval about 50 makes company
The upper and lower ends of fishplate bar 10 can be contacted with earthing bar, it is to avoid occur gap between the two, it is ensured that contact resistance is sufficiently small, be increased simultaneously
Plus the stability that both earthing bar and ground stud are connected.
Further, the area of the connecting plate 10 is more than the area of the stretching plate 20.Traditional ground stud will directly stretch out
Plate 20 is welded with earthing bar, and connecting plate 10 is not designed, causes ground stud resistance big, induced-current flows through heating during ground stud
Greatly, cause ground connection unreliable, there is potential safety hazard, the ground stud of the present embodiment is to reduce hair when induced-current flows through ground stud
Heat, is docked using connecting plate 10 with earthing bar, without welding, is that further reduce is generated heat, the area of connecting plate 10 is arranged to
More than the area of the stretching plate 20.The transverse slat 210 is mutually perpendicular to riser 220, the connecting plate 10 respectively with the horizontal stroke
Plate 210, riser 220 are vertically connected, and the connecting ear 30 is arranged on the one end of the riser 220 away from the connecting plate 10, this
Sample, which is set, makes the lockset in order that on transverse slat 210, is kept off by its cross bar 1 above the first nut, i.e. cross bar 1 and first
The relative position matching of nut can just play position-limiting action.
As shown in figure 1, a kind of substation grounding device, including earthing bar, ground wire (not shown) and described connect
Pile, the side of the connecting plate 10 is sticked on the line bank 100, and pressure is provided between connecting plate 10 and line bank 100
Corrosion resistant transition piece (not shown), the material for the side that the corrosion resistant transition piece is contacted with connecting plate 10 and the connecting plate 10
Material it is identical, the material phase of the material for the side that the corrosion resistant transition piece is contacted with line bank 100 and the line bank 100
Together, the ground wire is locked on the connecting ear 30 by the first nut and the first bolt 40.Earthing bar is typically installed
In equipment or on power distribution room wall.
The substation grounding device uses the integrally formed ground stud of aluminium alloy, it is to avoid welding procedure, and reduction ground stud is returned
Road overall electrical resistance, can effectively reduce heating when induced-current flows through ground stud；And set in flat connecting plate 10 with
Earthing bar is connected, the contact area of increase ground stud and earthing bar, is reduced the contact resistance between earthing bar and ground stud, is entered one
Step reduces heating when induced-current flows through ground stud, it is to avoid ablation, ground connection is reliable；Simultaneously in connecting plate 10 and line bank 100
Between pressure be provided with corrosion resistant transition piece, prevent electrochemical corrosion.Corrosion resistant transition piece described in the present embodiment is iron aluminium transition plate.And in
Between place iron aluminium transition plate prevent electrochemical corrosion.
As shown in figure 1, being arranged with holddown spring 60 on first bolt 40, the holddown spring 60 is located at the first nut
Between ground wire, increase ground stud and ground wire junction contact area reduce the contact electricity between ground wire and ground stud
Resistance, further reduces heating when induced-current flows through ground stud.The induced-current that ground wire flows through is up to 100A, tradition ground connection
Stake resistance measured value is up to 1.4 Ω, and one second ground stud caloric value is through-flow for a long time ground stud to be caused to generate heat up to 14000J
Even ablation, ground stud resistance measured value described in the present embodiment is 0.1 Ω, and can similarly obtain one second ground stud caloric value is
1000J, can reach dynamic equilibrium with radiating, do not result in ground stud heating, ground stud ablation is not resulted in more.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of ground stud, it is characterised in that including connecting plate, stretch out plate and connecting ear, the connecting plate is flat, described
Stretching plate be L-shaped bending plate, the L-shaped bending plate include in angle connect transverse slat and riser, the one side of the connecting plate with
One end connection of the transverse slat and riser, the another side of the connecting plate is used to be connected with earthing bar, the side of the riser
Face is connected with the connecting ear, and the connecting ear is provided with the first mounting hole, and first mounting hole is used to install the first bolt
Ground wire is locked, the connecting plate, stretching plate and connecting ear are integrally formed using aluminium alloy.
2. ground stud according to claim 1, it is characterised in that the end of the transverse slat and riser and the connecting plate
Side is connected by the first arc transition, and the transverse slat is connected with riser by the second arc transition.
3. ground stud according to claim 2, it is characterised in that the tensile strength of the ground stud is more than 205MPa, bar
Part yield strength is more than 170MPa.
4. the ground stud according to any one of claims 1 to 3, it is characterised in that the connecting plate is installed provided with second
Hole, second mounting hole, which is used for the second bolt of installation, makes connecting plate be locked at line bank.
5. ground stud according to claim 4, it is characterised in that the stretching plate is arranged on the bottom of the connecting plate,
The top of the connecting plate is provided with arranged for interval above and below two second mounting holes, two the second mounting holes.
6. the ground stud according to any one of claims 1 to 3, it is characterised in that the area of the connecting plate is more than described
Stretch out the area of plate.
7. the ground stud according to any one of claims 1 to 3, it is characterised in that the transverse slat is mutually perpendicular to riser, institute
State connecting plate respectively with the transverse slat, riser is vertical is connected, the connecting ear is arranged on the riser away from the connecting plate
One end.
8. a kind of substation grounding device, it is characterised in that including described in earthing bar, ground wire and any one of claim 1~7
Ground stud, the side of the connecting plate is sticked on the line bank, and pressure is provided with anti-corrosion mistake between connecting plate and line bank
Piece is crossed, the material for the side that the corrosion resistant transition piece is contacted with connecting plate is identical with the material of the connecting plate, the anti-corrosion mistake
The material for crossing the side that piece is contacted with line bank is identical with the material of the line bank, and the ground wire passes through the first nut and
One bolt is locked on the connecting ear.
9. substation grounding device according to claim 8, it is characterised in that the corrosion resistant transition piece is iron aluminium transition
Piece.
10. substation grounding device according to claim 8, it is characterised in that be arranged with compression on first bolt
Spring, the holddown spring is located between the first nut and ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710465515.2A CN107196073B (en) | 2017-06-19 | 2017-06-19 | Grounding device and grounding pile of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710465515.2A CN107196073B (en) | 2017-06-19 | 2017-06-19 | Grounding device and grounding pile of transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107196073A true CN107196073A (en) | 2017-09-22 |
| CN107196073B CN107196073B (en) | 2020-02-18 |
Family
ID=59878135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710465515.2A Active CN107196073B (en) | 2017-06-19 | 2017-06-19 | Grounding device and grounding pile of transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107196073B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659713A (en) * | 2018-12-14 | 2019-04-19 | 国网山东省电力公司济南供电公司 | A kind of earthing or grounding means that can detect conduction automatically |
| CN113839231A (en) * | 2021-11-02 | 2021-12-24 | 芜湖造船厂有限公司 | Boats and ships electrical equipment insulation installation earthing device |
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| US4871327A (en) * | 1988-11-14 | 1989-10-03 | H.P. Incorporated | Combined electrical grounding and mechanical locking means for ceiling mounted device |
| US6559387B1 (en) * | 2000-09-01 | 2003-05-06 | Senior Industries, Inc. | Universal ground clamp with S-shaped second strap |
| CN201038474Y (en) * | 2007-04-04 | 2008-03-19 | 实盈电子(东莞)有限公司 | Socket connector grounding improved structure |
| CN201421969Y (en) * | 2009-05-15 | 2010-03-10 | 珠海优特电力科技股份有限公司 | Detection locking device of temporary grounding wire |
| CN201421968Y (en) * | 2009-05-07 | 2010-03-10 | 珠海优特电力科技股份有限公司 | Detection locking device of temporary grounding wire |
| CN102263386A (en) * | 2010-05-31 | 2011-11-30 | 孟异山 | Grounding device dedicated for high-voltage shunt capacitor of transformer station |
| CN202930567U (en) * | 2012-11-14 | 2013-05-08 | 四川省电力公司德阳电业局 | Copper aluminum transitional device cable clamp |
| CN203734188U (en) * | 2014-03-11 | 2014-07-23 | 珠海优特电力科技股份有限公司 | Movable-type ground wire pile |
| CN204558973U (en) * | 2015-03-19 | 2015-08-12 | 国家电网公司 | For the checkout gear of 110kV substation grounding disconnecting link |
| CN204905454U (en) * | 2015-07-16 | 2015-12-23 | 国家电网公司 | Dry -type transformer earthing device |
| CN205985387U (en) * | 2016-08-31 | 2017-02-22 | 国家电网公司 | A earth connection for rectangle base |
| CN206003979U (en) * | 2015-12-07 | 2017-03-08 | 国家电网公司 | Transmission transformer station outdoor temporary earthing device |
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- 2017-06-19 CN CN201710465515.2A patent/CN107196073B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4871327A (en) * | 1988-11-14 | 1989-10-03 | H.P. Incorporated | Combined electrical grounding and mechanical locking means for ceiling mounted device |
| US6559387B1 (en) * | 2000-09-01 | 2003-05-06 | Senior Industries, Inc. | Universal ground clamp with S-shaped second strap |
| CN201038474Y (en) * | 2007-04-04 | 2008-03-19 | 实盈电子(东莞)有限公司 | Socket connector grounding improved structure |
| CN201421968Y (en) * | 2009-05-07 | 2010-03-10 | 珠海优特电力科技股份有限公司 | Detection locking device of temporary grounding wire |
| CN201421969Y (en) * | 2009-05-15 | 2010-03-10 | 珠海优特电力科技股份有限公司 | Detection locking device of temporary grounding wire |
| CN102263386A (en) * | 2010-05-31 | 2011-11-30 | 孟异山 | Grounding device dedicated for high-voltage shunt capacitor of transformer station |
| CN202930567U (en) * | 2012-11-14 | 2013-05-08 | 四川省电力公司德阳电业局 | Copper aluminum transitional device cable clamp |
| CN203734188U (en) * | 2014-03-11 | 2014-07-23 | 珠海优特电力科技股份有限公司 | Movable-type ground wire pile |
| CN204558973U (en) * | 2015-03-19 | 2015-08-12 | 国家电网公司 | For the checkout gear of 110kV substation grounding disconnecting link |
| CN204905454U (en) * | 2015-07-16 | 2015-12-23 | 国家电网公司 | Dry -type transformer earthing device |
| CN206003979U (en) * | 2015-12-07 | 2017-03-08 | 国家电网公司 | Transmission transformer station outdoor temporary earthing device |
| CN205985387U (en) * | 2016-08-31 | 2017-02-22 | 国家电网公司 | A earth connection for rectangle base |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659713A (en) * | 2018-12-14 | 2019-04-19 | 国网山东省电力公司济南供电公司 | A kind of earthing or grounding means that can detect conduction automatically |
| CN113839231A (en) * | 2021-11-02 | 2021-12-24 | 芜湖造船厂有限公司 | Boats and ships electrical equipment insulation installation earthing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107196073B (en) | 2020-02-18 |
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Effective date of registration: 20200924 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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