CN108320841A - Busbar, bus-bar room and switchgear - Google Patents
Busbar, bus-bar room and switchgear Download PDFInfo
- Publication number
- CN108320841A CN108320841A CN201711296870.8A CN201711296870A CN108320841A CN 108320841 A CN108320841 A CN 108320841A CN 201711296870 A CN201711296870 A CN 201711296870A CN 108320841 A CN108320841 A CN 108320841A
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- Prior art keywords
- busbar
- layer
- bus
- bar room
- conductive
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
Abstract
The present invention provides a kind of busbar, bus-bar room and switchgear, busbar includes：Conductive core；Electric layer is hindered, resistance electric layer is wrapped in the outer surface of at least partly core segment of conductive core；Wherein, resistance electric layer includes at least one layer of conductive layer and at least one layer of insulating layer.The busbar of the present invention solves the problems, such as that bus insulating property in the prior art is poor.
Description
Technical field
The present invention relates to power domains, in particular to a kind of busbar, bus-bar room and switchgear.
Background technology
Busbar in substation all plays always critically important effect in power supply, and the design of busbar is then to match electrical transmission
Prerequisite.Busbar is as electrical equipments and the phase such as the connection of each voltage class power distribution equipment and transformer in substation
The connection for answering power distribution equipment, has the function of collecting, distribute and transmit electric energy, and bus run situation is directly related to power generation, defeated
Electricity, the safety of electricity consumption, reliability, stability, bus insulation failure will influence the safe and reliable operation of busbar.
The reason of causing bus insulation failure is various, and cause of accident is different.Therefore, it is necessary to exhausted to busbar
The phenomenon that reason hinders and reason are analyzed comprehensively, and optimal processing scheme is formulated according to different causes of accident.According to me
Investigation it is found that cause bus insulation decline the main following points of factor：
1) cause the air gap and creep distance insufficient to reduce cabinet size, and do not take effective guarantee dielectric strength
Measure, this is the basic reason that insulation fault occurs for switchgear.
2) pollutants such as various solid, liquid, gas and dust, particle caused by mankind's activity, with nature
In the adverse weather conditions phase separation such as rain, snow, mist, ice, strong influence is caused to the external insulation of electrical equipment, leads to it absolutely
Edge intensity substantially reduces.
3) when contact poor contact or off-capacity, electric current is generated by bus bar resistance and its overlapped contact resistance
Fever, causes the temperature of regional area excessively high, diversion member at this is blown when serious, causes alternate or arc short-circuit over the ground, makes
At insulation flashover.
The prior art is mostly used such as under type：
(1) conventional generally to use air for the switchgear of dielectric；
(2) use SF6 gases for the switchgear of dielectric；
(3) switchgear using poly- atmosphere ethylene thermal contraction casing tube as bus insulation；
(4) solid insulation switch cabinet of pole technology is used.
The shortcomings that prior art
(1) it is the switchgear of dielectric to use air, and volume is larger, heavier-weight, operating difficulties, cannot especially meet
The requirement under the severe environmental conditions such as High aititude, humidity, filth.
(2) it is the switchgear of dielectric to use SF6 gases, although phase insulation distance is greatly decreased, switch cabinet body
Size substantially reduces, but SF6 gases can cause environmental problem, present SF6 gases to be also listed in the gas of limiting emission.
(3) switchgear using poly- atmosphere ethylene thermal contraction casing tube as bus insulation, because bending busbar need to be after casing
It can be bent, insulating layer subject to damage, while generate became uneven and causing high rejection rate.
(4) use pole technology solid insulation switch cabinet, product is not mature enough at present, there are unstable quality,
The problems such as material property is unqualified.
Invention content
The main purpose of the present invention is to provide a kind of busbar, bus-bar room and switchgears, to solve mother in the prior art
The poor problem of line insulation performance.
To achieve the goals above, according to the first aspect of the invention, a kind of busbar is provided, including：Conductive core；Resistance
Electric layer, resistance electric layer are wrapped in the outer surface of at least partly core segment of conductive core；Wherein, resistance electric layer includes at least one layer of conductive layer
And at least one layer of insulating layer.
Further, conductive layer is alternately distributed with insulating layer.
Further, the outermost layer for hindering electric layer is insulating layer, and insulating layer is wrapped in the outside of conductive layer.
Further, conductive core is cylinder, and/or the outer surface of resistance electric layer is cylindrical surface.
Further, conductive layer is prepared by conductive material, and insulating layer is prepared by insulating materials.
Further, insulating layer is formed by following at least one material preparation：Polyester film insulating materials, polytetrafluoroethylene (PTFE)
Insulating materials, silicone rubber insulation material or epoxy resin insulation material.
According to the second aspect of the invention, a kind of bus-bar room, including installation cabinet and busbar are provided, busbar setting exists
In Installation cabinet body, busbar is above-mentioned busbar.
Further, bus-bar room further includes installation set, and the both ends of busbar are arranged with installation set, and installation set is threaded through installation
On cabinet, wherein the resistance electric layer of busbar is in contact with installation set.
Further, busbar is multiple, and each busbar interval setting, installation set is arranged in pairs, installation set be it is multipair, it is each right
Installation set is respectively sleeved on corresponding busbar.
According to the third aspect of the present invention, a kind of switchgear, including switch cabinet body, bus-bar room and breaker are provided
Room, bus-bar room and breaker chamber are arranged in switch cabinet body, and bus-bar room is above-mentioned bus-bar room.
The busbar of the present invention can effectively improve the insulation of busbar by being enclosed with resistance electric layer in the outer surface of conductive core
Performance.Wherein, resistance electric layer is wrapped in the outer surface of at least partly core segment of conductive core, and resistance electric layer includes at least one layer of conductive layer
And at least one layer of insulating layer.In the specific manufacturing process of busbar, the preferable conductive core of electric conductivity is got out, is then being led
The outer surface package resistance electric layer of battery core, in order to make conductive core fade away to the electricity of the outer surface of resistance electric layer, resistance electricity
Layer includes at least one layer of conductive layer and at least one layer of insulating layer.The busbar of the present invention is enclosed with by the outer surface in conductive core
The resistance electric layer being made of at least one layer of conductive layer and at least one layer of insulating layer can effectively improve the insulation performance of busbar, solve
Bus insulating property in the prior art poor problem.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the embodiment of busbar according to the present invention；
Fig. 2 shows the structural schematic diagrams of the embodiment of bus-bar room according to the present invention；And
Fig. 3 shows the structural schematic diagram of the embodiment of switchgear according to the present invention.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, conductive core；20, electric layer is hindered；21, conductive layer；22, insulating layer；30, cabinet is installed；40, busbar；50, switchgear
Ontology；60, bus-bar room；70, breaker chamber；80, installation set；90, low-pressure chamber；100, circuit breaker cart；110, travelling bogie；
120, supporting insulator.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
The present invention provides a kind of busbares, referring to FIG. 1, busbar includes：Conductive core 10；Electric layer 20 is hindered, resistance electric layer 20 is wrapped
It is rolled in the outer surface of at least partly core segment of conductive core 10；Wherein, resistance electric layer 20 includes at least one layer of conductive layer 21 and extremely
A few layer insulating 22.
The busbar of the present invention can effectively improve busbar by being enclosed with resistance electric layer 20 in the outer surface of conductive core 10
Insulation performance.Wherein, resistance electric layer 20 is wrapped in the outer surface of at least partly core segment of conductive core 10, and resistance electric layer 20 includes at least
One layer of conductive layer 21 and at least one layer of insulating layer 22.In the specific manufacturing process of busbar, it is preferable to get out electric conductivity
Then conductive core 10 wraps up resistance electric layer 20 in the outer surface of conductive core 10, in order to make conductive core 10 to resistance electric layer 20
The electricity of outer surface fades away, and resistance electric layer 20 includes at least one layer of conductive layer 21 and at least one layer of insulating layer 22.The present invention
Busbar be made of at least one layer of conductive layer 21 and at least one layer of insulating layer 22 by being enclosed in the outer surface of conductive core 10
Resistance electric layer 20 can effectively improve the insulation performance of busbar, solve that bus insulating property in the prior art is poor to ask
Topic.
In order to make conductive layer 21 and insulating layer 22 reach the best resistance electrical property to conductive core 10, conductive layer 21 with
Insulating layer 22 is alternately distributed.
In the present embodiment, conductive layer 21 and insulating layer 22.
In the present embodiment, a kind of specific package form, first wraps up a layer insulating 22 in the outer surface of conductive core 10,
Then conductive layer 21 is wrapped up, then wraps up insulating layer 22 on conductive layer 21, is alternately distributed with this.It is best to finally obtain resistance electrical property
Resistance electric layer 20.
In order to ensure the safety of operating personnel, it is preferable that the outermost layer of resistance electric layer 20 is insulating layer 22, and insulating layer 22 wraps
It is rolled in the outside of conductive layer 21.
Preferably, conductive core 10 is cylinder, and/or the outer surface of resistance electric layer 20 is cylindrical surface.
Optionally, conductive core 10 is cuboid, and the outer surface of resistance electric layer 20 is cylindrical surface or square surface.
Preferably, conductive layer 21 is prepared by conductive material, and insulating layer 22 is prepared by insulating materials.
Correspondingly, insulating layer 22 is formed by following at least one material preparation：Polyester film insulating materials, polytetrafluoroethylene (PTFE)
Insulating materials, silicone rubber insulation material or epoxy resin insulation material.
The present invention also provides a kind of bus-bar rooms, as shown in Fig. 2, bus-bar room includes installation cabinet 30 and busbar 40, busbar
In installation cabinet 30, busbar 40 is above-mentioned busbar 40 for 40 settings.
Preferably, bus-bar room further includes installation set 80, and the both ends of busbar 40 are arranged with installation set 80, and installation set 80 is worn
On installation cabinet 30, wherein the resistance electric layer 20 of busbar 40 is in contact with installation set 80.
Preferably, busbar 40 is multiple, and the interval of each busbar 40 setting, installation set 80 is arranged in pairs, and installation set 80 is more
Right, each pair of installation set 80 is respectively sleeved on corresponding busbar 40.
Preferably, bus-bar room further includes supporting insulator 120, and at least part of busbar 40 utilizes supporting insulator 120
Support is in installation cabinet 30.
The bus-bar room of the present invention is through adjacent two cabinet is coupled, with the bus casing (installation set 80) in cabinet sidewall spacer
Support is fixed.Whole busbares are closed with pyrocondensation insulating sleeve.Main bus-bar and interbus use the copper bar of rectangular section, branch female
Line is coupled directly between stationary contact head cartridge and main bus-bar.If there is Internal faults arc, the partition board and bus casing of cabinet side wall
Accident is can effectively prevent to spread to adjacent cabinet.
After busbar applies coating insulation material, insulation performance is greatly improved than simple air insulation.Therefore, it is applied using busbar
Coating insulation material can reach raising insulation performance, reduce the requirement of cabinet volume.
(by taking 10kV as an example) is analyzed by Ansoft software emulations, we can determine whether switch cabinet bus chamber interior electric-field strengths
Degree distribution determines high potential area, and applies coating insulation material in region of interest, achievees the purpose that Insulation Transformation.
Excitation condition is arranged to institute's established model, 10kV voltages are set at 3 phase busbares, are arranged on 6 faces of metal shell
0V voltages (earthing of casing).
Under 10kV busbar voltages, bus-bar room median generatrix and the current potential of epoxy resin junction are very high, especially busbar
With the epoxy resin intersection above moving contact.The epoxy resin current potential of remaining position such as shell exterior is relatively low, this is also shell
Result caused by ground connection.
For the different organic insulating material table of comparisons of 4 kinds for being coated to busbar：
As can be seen from the above table, the two difference is in Mylar material good insulation preformance, but unit price is more expensive；Polytetrafluoro
Vinyl material insulation performance is taken second place, but unit price is relatively low.It is total weight in view of finally applying cost, considers density and list
Valence, in identical surface covered, polyester film is lower compared with polytetrafluoroethylene (PTFE) price, therefore selects polyester film for coating
Insulating materials.
Busbar it is specifically used during, the field strength at busbar is not all very high everywhere, and only busbar and gold
It is higher to belong to the close position electric field strength of shell, rest part electric field strength very little.This may be due to closer, the potential difference of distance
Very big, long square-column-shaped busbar is there are pyramid in addition, lead to point discharge and caused by.Therefore, our Insulation Transformation emphasis portion
Position is above-mentioned junction.So we select to apply coating insulation material in related junction.
Select polyester film wrapping condenser type composite insulating material as coatings, coated on busbar and busbar chamber enclosure
Intersection.
It is 200 that polyester film, which is arranged, to wrap condenser type composite insulating material relative dielectric constant, outside busbar and metal
Shell intersection one encloses, thickness 5mm, length 20mm.
By consulting GB11022-2011《Common specifications for high-voltage switchgear and controlgear standards》, country
Power grid《Prevent AC high voltage switchgear personal injury accident measure》Equal associated materials, we show that 10kV switch cabinet bus room is whole
Body field strength should be less than 9.0 × 105V/m of permission field intensity value under air conditions.
Selection coating polyester film wraps condenser type composite insulating material, at busbar and bus-bar room outer shell interface,
By changing its applied thickness, the best application pattern of final choice.
Setting is justified positioned at the control of upper left side intersection first, checks in the case of different insulative material thickness, controls
How is electric field strength on circle.On the basis of 1mm thickness ,+1mm is unit, observes electric field strength growth trend, simulation result is such as
Shown in following table.
The upper field strength table of comparisons of circle is controlled under material different-thickness：
With being continuously increased for insulation thickness, space field strength is gradually reduced at interface.Since polyester film wraps
Condenser type composite insulating material dielectric strength is high, is maintained to the low of busbar surface in the case that its applied thickness is lower
Electric field strength, therefore, under the premise of maintaining busbar surface electric field intensity extremely low, it should set about reducing the thickness for applying coating insulation material,
To achieve the purpose that busbar field strength and interface field strength are low.
From the foregoing it will be appreciated that bus-bar room entirety field strength should be less than 9.0 × 105V/m of permission field intensity value under air conditions.In order to
On this basis there are certain nargin, it is 8.6 × 105V/m to select field strength when 3mm, can meet field strength requirements, while meeting warp
Ji property and reliability.
The present invention also provides a kind of switchgears, as shown in figure 3, switchgear includes switch cabinet body 50,60 and of bus-bar room
Breaker chamber 70, bus-bar room 60 and breaker chamber 70 are arranged in switch cabinet body 50, and bus-bar room 60 is above-mentioned bus-bar room
60。
In the present embodiment, switchgear further includes low-pressure chamber 90, circuit breaker cart 100 and travelling bogie 110.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
The busbar of the present invention can effectively improve busbar by being enclosed with resistance electric layer 20 in the outer surface of conductive core 10
Insulation performance.Wherein, resistance electric layer 20 is wrapped in the outer surface of at least partly core segment of conductive core 10, and resistance electric layer 20 includes at least
One layer of conductive layer 21 and at least one layer of insulating layer 22.In the specific manufacturing process of busbar, it is preferable to get out electric conductivity
Then conductive core 10 wraps up resistance electric layer 20 in the outer surface of conductive core 10, in order to make conductive core 10 to resistance electric layer 20
The electricity of outer surface fades away, and resistance electric layer 20 includes at least one layer of conductive layer 21 and at least one layer of insulating layer 22.The present invention
Busbar be made of at least one layer of conductive layer 21 and at least one layer of insulating layer 22 by being enclosed in the outer surface of conductive core 10
Resistance electric layer 20 can effectively improve the insulation performance of busbar, solve that bus insulating property in the prior art is poor to ask
Topic.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so that presently filed embodiment described herein for example can be in addition to herein
Sequence other than those of diagram or description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment not
Those of be necessarily limited to clearly to list step or unit, but may include not listing clearly or for these processes, side
The intrinsic other steps of method, product or equipment or unit.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of busbar, which is characterized in that including：
Conductive core (10)；
Electric layer (20) is hindered, the resistance electric layer (20) is wrapped in the outer surface of at least partly core segment of the conductive core (10)；
Wherein, the resistance electric layer (20) includes at least one layer of conductive layer (21) and at least one layer of insulating layer (22).
2. busbar according to claim 1, which is characterized in that the conductive layer (21) replaces point with the insulating layer (22)
Cloth.
3. busbar according to claim 1, which is characterized in that the outermost layer of the resistance electric layer (20) is the insulating layer
(22),
The insulating layer (22) is wrapped in the outside of the conductive layer (21).
4. busbar according to claim 1, which is characterized in that the conductive core (10) is cylinder and/or resistance electricity
The outer surface of layer (20) is cylindrical surface.
5. busbar according to claim 1, which is characterized in that the conductive layer (21) is prepared by conductive material, institute
Insulating layer (22) is stated to be prepared by insulating materials.
6. busbar according to claim 1, which is characterized in that the insulating layer (22) is by following at least one material preparation
It forms：Polyester film insulating materials, Teflom Insulation Material, silicone rubber insulation material or epoxy resin insulation material.
7. a kind of bus-bar room, including installation cabinet (30) and busbar (40), the busbar (40) are arranged in the installation cabinet
(30) in, which is characterized in that the busbar (40) is busbar according to any one of claims 1 to 6 (40).
8. bus-bar room according to claim 7, which is characterized in that the bus-bar room further includes installation set (80), the mother
The both ends of line (40) are arranged with the installation set (80), and the installation set (80) is threaded through on the installation cabinet (30),
In, the resistance electric layer (20) of the busbar (40) is in contact with the installation set (80).
9. bus-bar room according to claim 8, which is characterized in that the busbar (40) is multiple, each busbar
(40) interval setting, the installation set (80) is arranged in pairs, the installation set (80) be it is multipair, it is each to the installation set (80) point
It is not set on the corresponding busbar (40).
10. a kind of switchgear, including switch cabinet body (50), bus-bar room (60) and breaker chamber (70), the bus-bar room (60)
It is arranged in the switch cabinet body (50) with the breaker chamber (70), which is characterized in that the bus-bar room (60) is power
Profit requires the bus-bar room (60) described in any one of 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296870.8A CN108320841A (en) | 2017-12-08 | 2017-12-08 | Busbar, bus-bar room and switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296870.8A CN108320841A (en) | 2017-12-08 | 2017-12-08 | Busbar, bus-bar room and switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108320841A true CN108320841A (en) | 2018-07-24 |
Family
ID=62892625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711296870.8A Pending CN108320841A (en) | 2017-12-08 | 2017-12-08 | Busbar, bus-bar room and switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108320841A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775898Y (en) * | 2004-12-17 | 2006-04-26 | 常州太平洋电力设备(集团)有限公司 | Bus room for inflating cabinet |
| CN101149996A (en) * | 2007-08-09 | 2008-03-26 | 罗志昭 | Multiple fission copper or aluminum busbar |
| CN101339824A (en) * | 2008-08-14 | 2009-01-07 | 上海西邦电气有限公司 | Composite insulating tube type bus and method for preparing the same |
| CN202210647U (en) * | 2011-09-29 | 2012-05-02 | 江苏赛威电气设备有限公司 | Framework assembly type switch cabinet |
-
2017
- 2017-12-08 CN CN201711296870.8A patent/CN108320841A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775898Y (en) * | 2004-12-17 | 2006-04-26 | 常州太平洋电力设备(集团)有限公司 | Bus room for inflating cabinet |
| CN101149996A (en) * | 2007-08-09 | 2008-03-26 | 罗志昭 | Multiple fission copper or aluminum busbar |
| CN101339824A (en) * | 2008-08-14 | 2009-01-07 | 上海西邦电气有限公司 | Composite insulating tube type bus and method for preparing the same |
| CN202210647U (en) * | 2011-09-29 | 2012-05-02 | 江苏赛威电气设备有限公司 | Framework assembly type switch cabinet |
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Application publication date: 20180724 |