CN103247965A - Ground connection device for charged replacement and lightning-protection system - Google Patents
Ground connection device for charged replacement and lightning-protection system Download PDFInfo
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- CN103247965A CN103247965A CN2013101585747A CN201310158574A CN103247965A CN 103247965 A CN103247965 A CN 103247965A CN 2013101585747 A CN2013101585747 A CN 2013101585747A CN 201310158574 A CN201310158574 A CN 201310158574A CN 103247965 A CN103247965 A CN 103247965A
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- ground connection
- charged
- plug
- base
- strip operation
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 2
- 206010014357 Electric shock Diseases 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 14
- 230000008859 change Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000192 social effect Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a ground connection device for charged replacement. The ground connection device comprises a first connecting base, a metal knife, a clamping piece and a second connecting base, wherein the metal knife is hinged to and electrically connected with the first connecting base; the clamping piece is arranged on the metal knife, and electrically connected with the metal knife; and the second connecting base is provided with a first brake falling prevention lock catch which is in clamping and matching connection with the clamping piece during switching on of the brake. According to the invention, time for safety actions is greatly shortened from an average of 27.5 min down to 4.57 min, working efficiency is improved, working aloft is not needed in operation, the risk of electric shock is avoided, safety factor is greatly enhanced, and blackout operation is unnecessary. The invention further discloses a lightning-protection system with the ground connection device for charged replacement.
Description
Technical field
The present invention relates to electrical equipment technical field, more particularly, relate to a kind of charged for replacement ground connection jockey and lightning protection system.
Background technology
Lightning arrester on-line monitoring instrument be in the high-voltage alternating electric power system with the matching used instrument of zinc oxide arrester, this instrument is serially connected in the arrester ground loop.Be mainly used to monitor lightning arrester operation total current and record lightning arrester overvoltage action frequency, the reflection lightning arrester is in service such as internal wetted, undesirable condition such as element is unusual, machinery is damaged, and the accident that prevents takes place, and has improved the reliability of power system operation.
At present, the circuit of 35kV and above electric pressure, bus, main transformer central point all are equipped with lightning arrester and on-line monitoring instrument.Genus major defect when lightning arrester on-line monitoring instrument shows 1.2 times of super primary datas of data, belong to urgent defective during 1.4 times of super primary datas, carry out test check and the check of on-line monitoring instrument with regard to needing in time to have a power failure to lightning arrester this moment, but according to over the years the failure rate statistics being found, because what the lightning arrester fault caused only accounts for 1.66%, on-line monitoring instrument fault causes that data are overproof often 98.33%, be because monitor exposes out of doors for a long time by analysis, exposed to wind and rain and be exposed to the sun with the sun, watered and wetting, cause data error, normal in order to ensure Monitoring Data, just need often to change the on-line monitoring instrument.
In the prior art, the mode of changing the on-line monitoring instrument can adopt charged and two kinds of replacing methods of power failure.Charged for replacement is by interim shorting stub with the lightning arrester cold end directly and the earth electrode short circuit, will directly change behind the on-line monitoring instrument bypass short circuit; Though operation need not the grid switching operation that has a power failure simply again, but there is sizable security risk, can't clip as shorting stub and come off or loose contact etc., evenly might in operation process, produce the suspension high potential by the lightning arrester cold end, cause the operating personnel to get an electric shock, the method suggestion is not generally adopted.The replacing that has a power failure is to change after On-line Fault monitor place circuit, bus or main transformer must being changed maintenance at interval again; the method is safe and reliable; but can cause the amount of power supply loss and reduce power supply reliability; can cause full the power failure for single circuit power supply, single main transformer operation electric substation; changing bus lightning arrester on-line monitoring instrument also can influence the action accuracy rate of electric quantity balancing rate and protective device in the electric substation, and having a power failure simultaneously to change also increases the grid switching operation risk.
Time and replacing time in above-mentioned two kinds of substitute modes are basic identical, and will be significantly less than the average time of the safety measure of charged for replacement, the coefficient of safety of charged for replacement but will be significantly less than the coefficient of safety that has a power failure and change in addition. the safety measure average time that has a power failure and changeThe repair time of charged for replacement mode is short, high efficiency, but its coefficient of safety is very low, exist very big potential safety hazard, and the safety measure time that the power failure substitute mode is done can't shorten, and therefore can only improve its coefficient of safety on the basis of charged for replacement mode.
Therefore, how on the basis of charged for replacement mode, improve its coefficient of safety, become the technical problem that those skilled in the art need to be resolved hurrily.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of charged for replacement ground connection jockey, with on the basis of charged for replacement mode, improve its coefficient of safety;
Another object of the present invention is to provide a kind of lightning protection system with above-mentioned charged for replacement ground connection jockey.
For achieving the above object, the invention provides following technical scheme:
A kind of charged for replacement ground connection jockey comprises:
First connects base;
With described first to be connected base hinged, and the steel edge that is electrically connected;
Be arranged on the described steel edge, and the shackle member that is electrically connected with described steel edge;
Second connects base, and described second connects base is provided with for join the first anti-breaking snap close that is connected with described shackle member realization card when closing a floodgate.
Preferably, in above-mentioned charged for replacement ground connection jockey, described steel edge comprises two metal rows, and two described metal rows connect by bolt.
Preferably, in above-mentioned charged for replacement ground connection jockey, described metal row is copper bar.
Preferably, in above-mentioned charged for replacement ground connection jockey, also comprise the double-screw bolt that compresses that passes two described metal rows, a described end that compresses double-screw bolt has nut, and the other end has nut;
Between described nut and one of them metal row, and all has holddown spring between nut and another metal row.
Preferably, in above-mentioned charged for replacement ground connection jockey, the described double-screw bolt that compresses is two, and one of them described double-screw bolt that compresses passes described metal row respectively and is connected base with described first.
Preferably, in above-mentioned charged for replacement ground connection jockey, described shackle member comprises:
Be arranged at the plug-in strip operation retainer ring on the described steel edge;
The plug-in strip operation swivel becket hinged with described plug-in strip operation retainer ring, described plug-in strip operation swivel becket is provided with the second anti-breaking snap close that cooperates with the described first anti-breaking snap close locking;
Link to each other with described plug-in strip operation swivel becket with described plug-in strip operation retainer ring respectively, and be used for guaranteeing that the described first anti-breaking snap close and the second anti-breaking snap close are in the elastic device of locking state.
Preferably, in above-mentioned charged for replacement ground connection jockey, described elastic device is extension spring.
Preferably, in above-mentioned charged for replacement ground connection jockey, the described second anti-breaking snap close and described elastic device lay respectively at the both sides of described plug-in strip operation swivel becket and described plug-in strip operation retainer ring articulated position.
Preferably, in above-mentioned charged for replacement ground connection jockey, described shackle member comprises that also being arranged at described plug-in strip operates on the retainer ring, and near described elastic device, is used for the guide vane end stop of the described plug-in strip operation of restriction swivel becket one rotation limit position.
A kind of lightning protection system, comprise lightning arrester and lightning arrester on-line detector, also comprise as above each described charged for replacement ground connection jockey, described first connects the low pressure base fixed screw place that base is electrically connected on described lightning arrester, and described second connects the mounting seat fixed screw place that base is electrically connected on described lightning arrester.
From above-mentioned technical scheme as can be seen, charged for replacement ground connection jockey provided by the invention is joined by the card of shackle member and the first anti-breaking snap close and to be connected the anti-tripping effect of realization, can avoid coming off, reliability is higher, and the present invention can directly just can operate on the ground by link rod.
Through test, the present invention does the safety measure time and shortens greatly, only is reduced to need from average 27.5 minutes 4.57 minutes, high efficiency not only, operation need not work high above the ground, has also evaded the electric shock risk, coefficient of safety promotes greatly, there is no need so the power failure operation also just becomes.
Direct benefit: in more the changing jobs of lightning arrester on-line monitoring instrument, the time of doing safety measure shortens greatly, and coefficient of safety also promotes greatly, has not only guaranteed staff's personal safety, and has improved operating efficiency greatly.
Indirect benefit: because the raising of coefficient of safety needed can live line working changing now of power failure operation in the past, amount when having reduced power failure produces good social effect.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the charged for replacement ground connection jockey that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the vertical view of Fig. 1;
The charged for replacement ground connection jockey that Fig. 3 provides for the embodiment of the invention uses the structural representation of state;
The charged for replacement ground connection jockey that Fig. 4 provides for the embodiment of the invention uses the partial structurtes schematic diagram of state.
Wherein, 1 is the first connection base, and 2 is steel edge, 3 is the second connection base, and 4 is plug-in strip operation swivel becket, and 5 is plug-in strip operation retainer ring, 6 is guide vane end stop, and 7 is elastic device, and 8 is the first anti-breaking snap close, 9 is holddown spring, 10 is bolt, and 11 for compressing double-screw bolt, and 101 is lightning arrester, 102 is the lightning arrester on-line detector, and 103 is charged for replacement ground connection jockey.
Embodiment
Core of the present invention is to provide a kind of charged for replacement ground connection jockey, with on the basis of charged for replacement mode, improves its coefficient of safety;
Another core of the present invention is to provide a kind of lightning protection system with above-mentioned charged for replacement ground connection jockey.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
See also Fig. 1 and Fig. 2, the structural representation of the charged for replacement ground connection jockey that Fig. 1 provides for the embodiment of the invention; Fig. 2 is the vertical view of Fig. 1.
The charged for replacement ground connection jockey that the embodiment of the invention provides comprises that the first connection base 1, steel edge 2, shackle member are connected base 3 with second.
Wherein, the first connection base 1 is connected base 3 and is respectively applied to be connected with two electric connecting terminals with second, and connects base 1 is connected base 3 with second electrical connection or disconnection, connection or the disconnection of two electric connecting terminals of realization by first.The first connection base 1 is connected base 3 and specifically can connects on the corresponding electric connecting terminal by screw with second, corresponding, and the first connection base 1 is connected with second can offer the screw hole that passes for screw on the base 3.
It is hinged that steel edge 2 and first is connected base 1, and be connected base 1 and be electrically connected.Steel edge 2 can rotate along jointed shaft relative to connecting base 1, finishes the function that connects and disconnect in the rotation process.Shackle member is arranged on the steel edge 2, and is electrically connected with steel edge 2.Second connects base 3 is provided with for join the first anti-breaking snap close 8 that is connected with shackle member realization card when closing a floodgate.Feed motion is realized by steel edge 2, and the locking behind combined floodgate is realized by shackle member and the first anti-breaking snap close 8.
Charged for replacement ground connection jockey provided by the invention is joined to be connected by the card of shackle member and the first anti-breaking snap close and is realized anti-tripping effect, can avoid coming off, and reliability is higher, and the present invention can directly just can operate on the ground by link rod.
Through test, the present invention does the safety measure time and shortens greatly, only is reduced to need from average 27.5 minutes 4.57 minutes, high efficiency not only, operation need not work high above the ground, has also evaded the electric shock risk, coefficient of safety promotes greatly, there is no need so the power failure operation also just becomes.
Direct benefit: in more the changing jobs of lightning arrester on-line monitoring instrument, the time of doing safety measure shortens greatly, and coefficient of safety also promotes greatly, has not only guaranteed staff's personal safety, and has improved operating efficiency greatly.
Indirect benefit: because the raising of coefficient of safety needed can live line working changing now of power failure operation in the past, amount when having reduced power failure produces good social effect.
In the present invention's one specific embodiment, steel edge 2 comprises two metal rows, and two metal rows connect by bolt 10.In order to guarantee two spacings between the metal row, one of them metal row positions by nut and a nut of bolt 10, and another one metal row positions by two nuts that lay respectively at this metal row both sides.
Metal row is preferably copper bar, and metal row's material is more preferably red copper.Red copper intensity height, anti-corrosive properties are strong, and conductivity is strong, is fit to produce in batches.In addition, metal row also can adopt band iron or aluminium row, and the present invention does not do restriction to metal row's material.
In the present invention's one specific embodiment, the present invention also can comprise pass two metals row compress double-screw bolt 11, an end that compresses double-screw bolt 11 has nut, the other end has nut.Between nut and one of them metal row, and all has holddown spring 9 between nut and another metal row.Preferably, compressing double-screw bolt 11 is two, and one of them compresses double-screw bolt 11 and pass metal row respectively and is connected base 1 with first, and this compresses the jointed shaft between the double-screw bolt formation first connection base 1 and the steel edge 2.
In the present invention's one specific embodiment, shackle member comprises plug-in strip operation retainer ring 5, elastic device 7 and plug-in strip operation swivel becket 4.Wherein, plug-in strip operation retainer ring 5 is arranged on the steel edge 2, and plug-in strip operation swivel becket 4 is hinged with plug-in strip operation retainer ring 5, make plug-in strip operation swivel becket 4 relatively plug-in strip operate retainer ring 5 and rotate.Plug-in strip operation swivel becket 4 is provided with the second anti-breaking snap close that cooperates with first anti-breaking snap close 8 lockings.
The first anti-breaking snap close 8 can be designed to the structure on an inclined-plane, and the second anti-breaking snap close can be designed to a hook formation, when the second anti-breaking snap close breaks away to a thicker side by one of first anti-breaking snap close 8 thinner thicknesses, has just realized locking.
Elastic device 7 links to each other with plug-in strip operation swivel becket 4 with plug-in strip operation retainer ring 5 respectively, and is used for guaranteeing that the first anti-breaking snap close 8 and the second anti-breaking snap close are in locking state.Under the effect of elastic device 7, the second anti-breaking snap close props up the first anti-breaking snap close 8, avoids throwing off.When needs are thrown off, rotate plug-in strip operation swivel becket 4, win anti-lost lock snap close 8 and the second anti-breaking snap close are thrown off, pass plug-in strip operation retainer ring 5 by link rod then and 4 pullings of plug-in strip operation swivel becket get final product.Concrete, elastic device 7 can be extension spring.
Further, the second anti-breaking snap close and elastic device 7 lay respectively at the both sides of plug-in strip operation swivel becket 4 and plug-in strip operation retainer ring 5 articulated position, when elastic device 7 was the compression spring, the second anti-breaking snap close and elastic device 7 also can be positioned at the same side of articulated position.
Further, shackle member can comprise that also being arranged at plug-in strip operates on the retainer ring 5, and near elastic device 7, is used for the guide vane end stop 6 of restriction plug-in strip operation swivel becket 4 one rotation limit positions, to avoid under the effect of elastic device 7, plug-in strip is operated swivel becket 4 be pulled to other inappropriate position.
See also Fig. 3 and Fig. 4, the charged for replacement ground connection jockey that Fig. 3 provides for the embodiment of the invention uses the structural representation of state; The charged for replacement ground connection jockey that Fig. 4 provides for the embodiment of the invention uses the partial structurtes schematic diagram of state.
The lightning protection system that the embodiment of the invention provides, comprise lightning arrester 101 and lightning arrester on-line detector 102, wherein, also comprise the as above disclosed charged for replacement ground connection of embodiment jockey 103, first connects the low pressure base fixed screw place that base 1 is electrically connected on lightning arrester 101, and second connects the mounting seat fixed screw place that base 3 is electrically connected on lightning arrester 101.
Three-phase of the present invention does not connect, independently operates respectively, targetedly, and selectivity, rapid operation, installing is convenient, debugging is simple.
The present invention uses when mainly applying to outdoor 35KV lightning arrester on-line monitoring instrument charged for replacement, purpose is to change traditional charged for replacement mode, namely put wire clamp by a connecting line high-pressure side and the ground connection of on-line monitoring instrument are located directly to change after the short circuit, improve security reliability; Avoid having a power failure and change, reduce labour intensity, reduce the operating time, improve power supply reliability.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a charged for replacement ground connection jockey is characterized in that, comprising:
First connects base (1);
With described first to be connected base (1) hinged, and the steel edge (2) that is electrically connected;
Be arranged on the described steel edge (2), and the shackle member that is electrically connected with described steel edge (2);
Second connects base (3), and described second connects base (3) is provided with for join the first anti-breaking snap close (8) that is connected with described shackle member realization card when closing a floodgate.
2. charged for replacement ground connection jockey as claimed in claim 1 is characterized in that, described steel edge (2) comprises two metal rows, and two described metal rows connect by bolt (10).
3. charged for replacement ground connection jockey as claimed in claim 2 is characterized in that, described metal row is copper bar.
4. charged for replacement ground connection jockey as claimed in claim 2 is characterized in that, also comprise pass two described metals rows compress double-screw bolt (11), a described end that compresses double-screw bolt (11) has nut, the other end has nut;
Between described nut and one of them metal row, and all has holddown spring (9) between nut and another metal row.
5. charged for replacement ground connection jockey as claimed in claim 4 is characterized in that, the described double-screw bolt (11) that compresses is two, and one of them described double-screw bolt (11) that compresses passes described metal row respectively and is connected base (1) with described first.
6. as each described charged for replacement ground connection jockey of claim 1-5, it is characterized in that described shackle member comprises:
Be arranged at the plug-in strip operation retainer ring (5) on the described steel edge (2);
The plug-in strip operation swivel becket (4) hinged with described plug-in strip operation retainer ring (5), described plug-in strip operation swivel becket (4) is provided with the second anti-breaking snap close that cooperates with described first anti-breaking snap close (8) locking;
Link to each other with described plug-in strip operation swivel becket (4) with described plug-in strip operation retainer ring (5) respectively, and be used for guaranteeing that the described first anti-breaking snap close (8) and the second anti-breaking snap close are in the elastic device (7) of locking state.
7. charged for replacement ground connection jockey as claimed in claim 6 is characterized in that, described elastic device (7) is extension spring.
8. charged for replacement ground connection jockey as claimed in claim 6, it is characterized in that the described second anti-breaking snap close and described elastic device (7) lay respectively at the both sides of described plug-in strip operation swivel becket (4) and described plug-in strip operation retainer ring (5) articulated position.
9. charged for replacement ground connection jockey as claimed in claim 6, it is characterized in that, described shackle member comprises that also being arranged at described plug-in strip operates on the retainer ring (5), and near described elastic device (7), be used for the guide vane end stop (6) of the described plug-in strip operation of restriction swivel becket (4) one rotation limit positions.
10. lightning protection system, comprise lightning arrester (101) and lightning arrester on-line detector (102), it is characterized in that, also comprise each described charged for replacement ground connection jockey (103) as claim 1-9, described first connects the low pressure base fixed screw place that base (1) is electrically connected on described lightning arrester (101), and described second connects the mounting seat fixed screw place that base (3) is electrically connected on described lightning arrester (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310158574.7A CN103247965B (en) | 2013-05-02 | 2013-05-02 | A kind of charged for replacement ground connecting device and lightning protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310158574.7A CN103247965B (en) | 2013-05-02 | 2013-05-02 | A kind of charged for replacement ground connecting device and lightning protection system |
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| Publication Number | Publication Date |
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| CN103247965A true CN103247965A (en) | 2013-08-14 |
| CN103247965B CN103247965B (en) | 2016-02-03 |
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| CN201310158574.7A Active CN103247965B (en) | 2013-05-02 | 2013-05-02 | A kind of charged for replacement ground connecting device and lightning protection system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201311470Y (en) * | 2008-11-21 | 2009-09-16 | 康建准 | On-line monitoring device of lightning arrester |
| JP2010045911A (en) * | 2008-08-12 | 2010-02-25 | Chugoku Electric Power Co Inc:The | Short circuit grounding device |
| CN202258964U (en) * | 2011-07-31 | 2012-05-30 | 黄声宏 | Low-voltage fusing switch |
| CN203205773U (en) * | 2013-05-02 | 2013-09-18 | 国家电网公司 | Grounding connection device allowing live-line change and lightning protection system |
-
2013
- 2013-05-02 CN CN201310158574.7A patent/CN103247965B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010045911A (en) * | 2008-08-12 | 2010-02-25 | Chugoku Electric Power Co Inc:The | Short circuit grounding device |
| CN201311470Y (en) * | 2008-11-21 | 2009-09-16 | 康建准 | On-line monitoring device of lightning arrester |
| CN202258964U (en) * | 2011-07-31 | 2012-05-30 | 黄声宏 | Low-voltage fusing switch |
| CN203205773U (en) * | 2013-05-02 | 2013-09-18 | 国家电网公司 | Grounding connection device allowing live-line change and lightning protection system |
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| Publication number | Publication date |
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| CN103247965B (en) | 2016-02-03 |
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