CN107294030B - Tubular bus connecting structure - Google Patents
Tubular bus connecting structure Download PDFInfo
- Publication number
- CN107294030B CN107294030B CN201710609664.1A CN201710609664A CN107294030B CN 107294030 B CN107294030 B CN 107294030B CN 201710609664 A CN201710609664 A CN 201710609664A CN 107294030 B CN107294030 B CN 107294030B
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- piece
- conductor
- switch cabinet
- tubular bus
- tubular
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/007—Butt joining of bus-bars by means of a common bolt, e.g. splice joint
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- 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
- H01R4/56—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 one conductor screwing into another
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- 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
- H01R4/70—Insulation of connections
Abstract
The invention discloses a tubular bus connecting structure which is used for being inserted into a socket of a switch cabinet to realize the electrical conduction of an inlet wire and an outlet wire of the switch cabinet and comprises a conductor connecting piece, a tubular bus, a silicon rubber insulating piece and a fastening piece; the conductor connecting piece is fixedly connected to the top of the tubular bus and used for being inserted into a socket of the switch cabinet to be electrically connected with a socket conductor; the silicon rubber insulator is sleeved on the outer surface of the part, located below the conductor connecting piece, of the tubular bus, located in the switch cabinet when the tubular bus works, and is used for insulating and electrically isolating a socket of the switch cabinet; the fastening piece is arranged below the silicon rubber insulating piece and is used for being fixedly connected with the switch cabinet during working; the pipe bus connecting structure further comprises a stress supporting piece, wherein the stress supporting piece comprises a metal bearing ring and a semi-conductive silicon rubber ring which covers the outer surface of the metal bearing ring. The invention solves the development requirements of through-flow performance and miniaturization of the switch cabinet, and can upgrade rated current without changing the existing switch equipment.
Description
Technical Field
The invention relates to the technical field of power transmission equipment of power cables, in particular to a tubular bus connecting structure.
Background
In an electric power system, the inlet and outlet wires of the gas-filled cabinet are connected by a power cable and accessories thereof, the power cable has years of use and operation experience, and the gas-filled cabinet is high in insulation level, stable and reliable. However, the current capacity of the cable is relatively poor, and in the case of 35kV power cables, the maximum cross section used at present is 630mm 2 The rated current can only reach 1250A, so that the development requirement of the switch cabinet is greatly restricted, and the requirements of many projects cannot be met; in order to achieve the purpose of transmitting large current of 2500A or above, two or more cables are generally connected in parallel, more cables and accessories thereof are required to be matched, and the cost is increased; and this mode makes the inlet wire scheme complicated, and occupation space is big, contradicts with the trend of present cubical switchboard miniaturization compactification.
In addition, some cable incoming and outgoing line switching devices are already used in the power system, and the matched epoxy sockets can meet the requirement of high current, but the through current is small due to the limitation of the cable. In order to increase the rated current of the system, if the current switch device is replaced, the cost is increased greatly.
Therefore, a novel switch cabinet wire inlet and outlet structure which is large in through-flow rate, high in insulating property and convenient to install and use needs to be developed and designed to meet the development requirements of through-flow performance and miniaturization of a switch cabinet, and rated current can be upgraded without changing the existing switch equipment.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a tubular bus connection structure, which solves the development requirements of through-flow performance and miniaturization of a switch cabinet and can upgrade rated current without changing the existing switch equipment.
In order to solve the technical problems, the invention provides the following technical scheme: a tubular bus connecting structure is used for being inserted into a socket of a switch cabinet to realize the electrical conduction of an inlet wire and an outlet wire of the switch cabinet and comprises a conductor connecting piece, a tubular bus, a silicon rubber insulating piece and a fastening piece; the conductor connecting piece is fixedly connected to the top of the tubular bus and used for being inserted into a socket of the switch cabinet to be electrically connected with a socket conductor; the silicon rubber insulator is sleeved on the outer surface of the part, located below the conductor connecting piece, of the tubular bus, located in the switch cabinet when the tubular bus works, and is used for insulating and electrically isolating a socket of the switch cabinet; the fastener is installed below the silicon rubber insulating part and is used for being fixedly connected with the switch cabinet during working.
Furthermore, the conductor connecting piece consists of a contact ring, a large gasket and a screw; a section of the middle part of the inner wall of the contact ring is provided with a taper which is matched with a pipe bus connected with the contact ring so as to ensure close fit and increase the contact area; the outer side of the contact ring is provided with a groove for mounting a watch chain contact finger so as to realize connection with a socket conductor; and the large gasket and the screw are arranged on the upper end surface of the contact ring and used for fixedly connecting the conductor connecting piece with the top of the tubular bus.
Furthermore, the uppermost section of the inner wall of the contact ring is of a non-taper circular ring structure so as to be used as installation guide, and the taper of the lowermost section is greater than that of the middle section, so that the contact ring is convenient to connect and install with the tubular bus.
Further, the tubular busbar comprises a metal conductor and an epoxy insulation casting; the metal conductor is formed by connecting a copper bar and a copper pipe or integrally forming the metal conductor, the upper end part of the metal conductor is of a copper bar structure, and the circle center of the upper end of the copper bar is provided with a threaded groove so as to realize the connection with the conductor connecting piece; the copper bar structure has a certain taper, and a section of the copper bar structure in the middle of the contact ring is in close contact with the contact ring during connection; the epoxy insulation pouring piece is covered on the outer surface of the metal conductor outside the conductor connecting piece.
Further, the epoxy insulation casting piece comprises an upper section conical body part and a lower section circular body part, wherein the conical body part covers the part, located in the switch cabinet when the metal conductor works, of the metal conductor.
Furthermore, the silicon rubber insulator is sleeved on the outer surface of the part of the tubular bus located below the conductor connecting piece and located in the switch cabinet during operation of the tubular bus, and means that the silicon rubber insulator is in a cone shape, is sleeved outside the epoxy insulation pouring piece and is matched with the cone part of the upper section of the epoxy insulation pouring piece.
Further, the fastener is a metal flange, and the metal flange comprises a positioning shell and a fixing flange; a plurality of grooves are formed in the inner wall of the positioning shell and are poured into a whole with the circular body part of the lower section of the epoxy insulation pouring piece of the tubular bus; the outer wall of the positioning shell is provided with threads which are in threaded connection with the fixed flange.
Furthermore, a sealing groove for installing a sealing element is formed in the upper end of the fixing flange; the upper end of the fixed flange adopts a bell mouth inclined plane structure with a large upper part and a small lower part.
Furthermore, the fastener is arranged below the silicon rubber insulating part, namely the upper end of the fixing flange is arranged below the silicon rubber insulating part, and the tail end of the silicon rubber insulating part also adopts a bell-mouth inclined plane structure which is matched with the upper end of the fixing flange and has a large upper part and a small lower part.
Furthermore, the tubular bus connecting structure further comprises a stress supporting piece, wherein the stress supporting piece comprises a metal force bearing ring and a semi-conductive silicon rubber ring coated on the outer surface of the metal force bearing ring; when the device works, the stress supporting piece is sleeved outside the pipe main piece through the metal bearing ring and is arranged below the conductor connecting piece.
After the technical scheme is adopted, the invention at least has the following beneficial effects:
(1) By adopting the tubular bus connecting structure, the rated current can be upgraded without changing the existing switchgear, the same current amount can be realized without using a plurality of cables as the existing material, the installation process is simplified, and the installation difficulty is reduced;
(2) The stress support piece of the invention adopts a mode of combining the silicon rubber material and the metal material, and plays roles of buffering and compensating on the basis of realizing bearing positioning, thereby avoiding mechanical damage and vibration;
(3) The fastener adopts an assembly structure, can realize in-factory pouring of the positioning shell, is safe and reliable, and does not influence the assembly of the on-site current transformer;
(4) The conductor connecting piece increases the contact area with the socket of the switch cabinet, so that the current amount is increased, the whole pipe bus connecting structure is fastened and connected through the fastening piece, and particularly, the threaded connection capable of being adjusted up and down is adopted, so that the depth of the conductor connecting piece with the socket in the switch cabinet can be conveniently adjusted, the electrical contact with the socket of the switch cabinet is better realized, the occurrence of poor contact is avoided, and the safety and reliability are realized.
Drawings
FIG. 1 is a schematic structural view of a tubular busbar connection structure according to the present invention;
FIG. 2 is a schematic view of a tubular busbar construction of a tubular busbar connection structure according to the present invention;
FIG. 3 is a schematic view of a fastener structure of a tubular busbar connecting structure according to the invention;
FIG. 4 is a schematic view of the seal construction of the fastener of FIG. 3;
FIG. 5 is a schematic view of a stress support structure of a tubular busbar joining structure according to the present invention;
FIG. 6 is a schematic view of a conductor connecting member of a tubular busbar connecting structure according to the present invention;
fig. 7 is a schematic view of a contact ring structure of the conductor connection of fig. 6.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present application is further described in detail with reference to the drawings and specific embodiments.
Example one
The invention aims to solve the development requirements of through-flow performance and miniaturization of the switch cabinet, and can upgrade rated current without changing the existing switch equipment; the tubular bus connecting structure has the advantages of reliable pressure resistance, strong through-current capacity, compact structure and convenience in installation.
In order to achieve the above purpose, as shown in fig. 1, the present invention is realized by the following technical solutions: a tubular bus connecting structure comprises a tubular bus 3, a fastening piece 4, a silicon rubber insulating piece 5, a stress supporting piece 6 and a conductor connecting piece 7. Wherein, with whole tub generating line connection structure, assemble in the socket 2 of cubical switchboard 1, thereby realize the electric of cubical switchboard 1 business turn over line with the socket conductor electricity among the socket 2 electricity and switch on, make whole electric power system safety and stability operation.
More specifically, as shown in fig. 2, the tubular bus bar 3 includes a metal conductor 31 and an epoxy insulating potting member 32; preferably, the metal conductor 31 is formed by connecting a copper rod and a copper pipe, the end part of the metal conductor 31 is of a copper rod structure, the upper end of the copper rod is provided with a thread so as to realize matching connection with the conductor connecting piece 7 and make a certain taper, and the middle part of a contact ring of the conductor connecting piece 7 is also provided with a taper structure, so that the metal conductor 31 is more tightly connected with the conductor connecting piece 7, and the through-current capability is stronger; the lower end of the copper bar adopts a copper pipe structure, and due to the skin effect of current transmission, the through current mainly depends on the outer layer of the conductor, so that the copper pipe structure cannot influence the through current capacity, and the copper pipe structure can reduce the material cost and weight and is convenient to install and use. Preferably, an epoxy insulation casting 32, provided as a conical part of the upper section and a circular part of the lower section, respectively; in addition, the silicon rubber insulating part 5 is sleeved on the outer surface of the part of the tubular bus, which is positioned below the conductor connecting part and is positioned in the switch cabinet when the tubular bus works, and is used for insulating and electrically isolating the socket of the switch cabinet; the silicon rubber insulating part 5 also adopts a cone shape and is sleeved outside the epoxy insulating pouring part 32, so that the assembly of the cone part at the upper section of the epoxy insulating pouring part 32 and the silicon rubber insulating part 5 is more suitable and firmer; the circular body part of the lower section of the epoxy insulation pouring piece 32 is poured into a linear structure, so that the demolding and splicing are more convenient.
As shown in fig. 3, the fastening member 4 is installed below the silicon rubber insulating member, and when the switch cabinet works in practice, the tubular bus connecting structure is inserted into a socket of the switch cabinet, and the fastening member 4 is fixedly connected with the switch cabinet, so that the tubular bus connecting structure fastens the switch cabinet to avoid falling off; preferably, the fastening member 4 is a metal flange, and includes a positioning housing 41 and a fixing flange 42, the inner wall of the positioning housing 41 is provided with a plurality of grooves and is integrally cast with the circular body part of the lower section of the epoxy insulation casting 32 of the tubular bus 3, and the outer wall of the positioning housing 41 is provided with threads and is in threaded connection with the fixing flange 42; specifically, the positioning shell 41 is cast with the epoxy insulation casting 32 of the tubular bus bar 3 into a whole according to a certain positioning size, so as to realize synchronous installation; the multi-channel groove is formed in the epoxy pouring box, when epoxy pouring is carried out, epoxy can enter the groove-shaped structure, and compared with a cylindrical surface, the epoxy pouring box can be well combined with the cylindrical surface, so that the epoxy pouring box is connected with the epoxy more firmly. The upper end of the fixed flange 42 is provided with a groove and a sealing element 43, so that the whole pipe bus connecting structure and the switch cabinet 1 are sealed; the cross section of the sealing element 43 is of a rectangular structure, so that the sealing element has larger compression amount than the existing commonly used O-shaped sealing ring structure, double sealing of the end face and the side face can be realized, the sealing is more reliable, the structure of the sealing element 43 is shown in fig. 4, and the existing O-shaped sealing ring is certainly selected and used. Preferably, the upper end of the fixing flange 42 is made into a bell-mouth inclined plane structure, so that the fixing flange can be more fully connected with the silicon rubber insulating part 5 to play a role in bearing force; compared with a straight surface structure, the inclined surface structure of the grounding wire has a larger contact surface with the silicon rubber insulating part 5, so that the sufficient contact is ensured, and the grounding is more reliable; the lower end adopts screw thread structure and location shell 41 to link as an organic whole, and screw thread structure has upper and lower regulating power, can increase or turn down and adapt to on-the-spot mounting dimension to deal with cubical switchboard and fastener 4 mounting dimension error and the installation problem that leads to. The fixing flange 42 is connected with the switch cabinet 1 through a mounting hole formed on the fixing flange. Because the tubular bus structure often passes through the current transformer, but the flange of the tubular bus structure is generally large in size, in order to complete the assembly of the current transformer, the existing tubular bus structure often adopts an assembly mode with an epoxy field; the fastener 4 adopts a splicing structure of the positioning shell 41 and the fixed flange 42, so that the positioning shell 41 is integrally cast with epoxy in a factory, is more reliable and controllable compared with field installation, has smaller outer diameter and can pass through a current transformer.
Preferably, the inner cavity of the silicon rubber insulating part 5 is of an inner cone structure to realize connection with a cone head of the epoxy insulating pouring part 32, and the outer part of the silicon rubber insulating part 5 is of an outer cone structure and can be inserted into the switch socket 2 to realize insulation matching of the tubular bus bar 3 and the switch cabinet 1. The lower end of the inner cavity of the silicon rubber insulating part 5 adopts a stress cone structure to improve electric field distribution and ensure that the electric operation is more reliable.
As shown in fig. 5, the stress supporting member 6 adopts a combined structure of a semi-conductive silicone rubber and a metal force-bearing ring, the semi-conductive silicone rubber is covered on the outer surface of the metal force-bearing ring, the silicone rubber material has excellent elastic deformation capacity, and the semi-conductive silicone rubber is used for size adjustment and buffering during the assembly of the tubular bus, so that the mechanical damage caused by the hard assembly of the epoxy of the tubular bus 3 and the metal member is avoided, and the vibration problem caused by the improper assembly can be solved; the metal bearing ring is made of a non-magnetic metal material, so that the heating phenomenon caused by large current is avoided, and the metal bearing ring has a certain supporting force for limiting the positioning of the silicon rubber insulating part 5, so that the creeping problem caused by insufficient conical surface matching pressure possibly caused by upward displacement is avoided. The test shows that: only the semiconductive silicon rubber soft structure is adopted, when the structure is integrally assembled, the semiconductive silicon rubber deforms and concaves upwards under stress, so that the silicone rubber insulating part 5 moves upwards by about 10mm relative to the tubular bus epoxy casting body, and the performance of the silicone rubber insulating part is reduced by 20% when the electrical performance is detected; and only adopt metal rigid structure, when it has the space with socket 2 connection face, because of lacking self-adjusting ability, when circular telegram heavy current, the metalwork can produce strong vibration under the electric power effect, and the heat that produces the heat leads to the insulating thermal ageing of silicon rubber, can lead to the breakdown destruction in the long term.
As shown in fig. 6, the conductor connecting member 7 is composed of a contact ring 71, a large spacer 72 and a screw 73; the outer side of the contact ring 71 is provided with a concave groove for mounting a watch chain contact finger, and the watch chain is fixed in the groove and does not slip; the watch chain is connected by multiple contacts, a plurality of connecting sheets connected in parallel can greatly reduce the connecting resistance, and the watch chain has enough large compression amount, high continuous current carrying capacity, good electrical conductivity and thermal conductivity, enough high contact force and anti-vibration performance, can realize the connection with the inner cavity of the socket conductor 21, and ensures the through-current capacity; as shown in fig. 7, the inner side of the contact ring 71 adopts a plurality of sections of tapers, the invention preferably adopts three sections of tapers, wherein the taper 2 is greater than the taper 1, the taper at the lower part is greater than the taper at the middle part, and the installation is easy due to the guiding function; the middle part is a contact surface which is consistent with the taper of the tubular bus metal conductor 31, so that the contact surface is ensured to be tightly matched, the contact area is increased, and the through flow is ensured; the upper part has no angle, thus playing a role in limiting; the contact ring 71 is sleeved on the tubular bus metal conductor 31, the upper end surface of the contact ring 71 is slightly higher than the end surface of the tubular bus metal conductor 31 when the installation is started, the upper end of the contact ring 71 is provided with the large gasket 72, and the contact ring 71 is driven to move downwards through the screw 73, so that the contact ring 71 is completely locked with the tubular bus metal conductor 31 after the installation is finished, the tight connection between the contact ring 71 and the tubular bus metal conductor 31 is ensured, and the conduction problem of large current is solved. The structure can meet the current requirement of more than 2500A, and the technical parameter can be achieved only by connecting 34 cables in parallel by adopting the cable structure. The existing tubular bus conductor mostly adopts a bar-shaped structure, and the current conduction is realized by slotting a socket conductor and installing a spring contact finger; the watch chain is arranged on the contact ring 71, and the inner cavity of the socket conductor 21 is of a smooth straight-tube structure and is consistent with the structure of the existing socket conductor connected with a cable, so that the rated current can be upgraded without changing the existing switch equipment.
Example two
The present embodiment is different from the first embodiment only in that the stress supporting member 6 is not required to be used in the present embodiment, and other structures are the same as those of the first embodiment.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various equivalent changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
1. A tubular bus connecting structure is used for being inserted into a socket of a switch cabinet to realize the electrical conduction of an inlet wire and an outlet wire of the switch cabinet and is characterized by comprising a conductor connecting piece, a tubular bus, a silicon rubber insulating piece and a fastening piece; the conductor connecting piece is fixedly connected to the top of the tubular bus and used for being inserted into a socket of the switch cabinet to be electrically connected with a socket conductor; the silicon rubber insulator is sleeved on the outer surface of the part, located below the conductor connecting piece, of the tubular bus to the inside of the switch cabinet when the tubular bus works, and is used for insulating and electrically isolating a socket of the switch cabinet; the fastening piece is arranged below the silicon rubber insulating piece and is used for being fixedly connected with the switch cabinet during working;
the conductor connecting piece consists of a contact ring, a large gasket and a screw; the middle section of the inner wall of the contact ring is provided with a taper which is matched with a tubular bus connected with the contact ring so as to ensure close fit and increase the contact area; the outer side of the contact ring is provided with a groove for mounting a watch chain contact finger so as to realize connection with a socket conductor; the large gasket and the screw are arranged on the upper end face of the contact ring and used for fixedly connecting the conductor connecting piece with the top of the tubular bus;
the tubular bus comprises a metal conductor and an epoxy insulating pouring piece; the metal conductor is formed by connecting a copper bar and a copper pipe or integrally forming the metal conductor, the upper end part of the metal conductor is of a copper bar structure, and the circle center of the upper end of the copper bar is provided with a threaded groove so as to realize the connection with the conductor connecting piece; the copper bar structure has a certain taper, and a section of the copper bar structure in the middle of the contact ring is in close contact with the contact ring during connection; the epoxy insulating pouring piece is covered on the outer surface of the metal conductor outside the conductor connecting piece;
the epoxy insulation pouring piece comprises an upper conical body part and a lower circular body part, wherein the conical body part is covered on the part, located in the switch cabinet when the metal conductor works;
the fastening piece is a metal flange, and the metal flange comprises a positioning shell and a fixed flange; a plurality of grooves are formed in the inner wall of the positioning shell and are cast with the circular body part of the lower section of the epoxy insulation casting piece of the tubular bus into a whole; the outer wall of the positioning shell is provided with threads which are in threaded connection with the fixed flange;
the uppermost section of the inner wall of the contact ring is of a non-taper circular ring structure so as to be used as installation guide, and the taper of the lowermost section is greater than that of the middle section, so that the contact ring is convenient to be connected with the tubular bus and installed.
2. The tubular busbar connecting structure according to claim 1, wherein the silicone rubber insulator is sleeved on the outer surface of the part of the tubular busbar located below the conductor connecting piece and inside the switch cabinet during operation of the tubular busbar, which means that the silicone rubber insulator is cone-shaped, sleeved outside the epoxy insulating casting and matched with the cone-shaped part on the upper section of the epoxy insulating casting.
3. The tubular busbar connecting structure according to claim 1, wherein a sealing groove for installing a sealing member is formed at an upper end of the fixing flange; the upper end of the fixed flange adopts a bell-mouth inclined plane structure with a large upper part and a small lower part.
4. The tubular busbar connecting structure according to claim 3, wherein the fastening member is mounted below the silicone rubber insulating member, that is, the upper end of the fixing flange is mounted below the silicone rubber insulating member, and the tail end of the silicone rubber insulating member also adopts a bell-mouth inclined surface structure which is matched with the upper end of the fixing flange and has a large upper part and a small lower part.
5. The tubular busbar connecting structure according to any one of claims 1 to 4, further comprising a stress supporting member, wherein the stress supporting member comprises a metal force bearing ring and a semi-conductive silicone rubber ring coated on the outer surface of the metal force bearing ring; when in work, the stress supporting piece is sleeved outside the pipe female piece and arranged below the conductor connecting piece through the metal bearing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609664.1A CN107294030B (en) | 2017-07-25 | 2017-07-25 | Tubular bus connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609664.1A CN107294030B (en) | 2017-07-25 | 2017-07-25 | Tubular bus connecting structure |
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| CN107294030A CN107294030A (en) | 2017-10-24 |
| CN107294030B true CN107294030B (en) | 2022-10-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3474024A1 (en) * | 2017-10-19 | 2019-04-24 | RITZ Instrument Transformers GmbH | Current transformer with fluid or oil-impregnated paper insulation for high voltage |
| CN108134233A (en) * | 2017-12-05 | 2018-06-08 | 贵州航天凯山石油仪器有限公司 | The electrical connection methods and structure that a kind of high pressure resistant wet type in underground is given up with socket |
| CN113078578A (en) * | 2021-04-02 | 2021-07-06 | 长江勘测规划设计研究有限责任公司 | High-voltage equipment connecting structure of offshore booster station and mounting method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4202998A (en) * | 1978-07-17 | 1980-05-13 | Gould Inc. | Air entrance bushing for gas-insulated bus |
| DE29520459U1 (en) * | 1995-12-22 | 1997-04-24 | Giersiepen Gira Gmbh | Electrical installation device with central cover |
| JP5198989B2 (en) * | 2008-03-18 | 2013-05-15 | 一般財団法人電力中央研究所 | Conductor connection device for gas insulated power equipment |
| CN201708505U (en) * | 2010-07-06 | 2011-01-12 | 沈阳华利能源设备制造有限公司 | Inner cone bus insulating sleeve |
| CN103001167B (en) * | 2012-11-09 | 2015-10-07 | 广东吉熙安电缆附件有限公司 | A kind of solid insulated busbar syndeton be connected with user side for switchgear |
| CN203617673U (en) * | 2013-12-16 | 2014-05-28 | 广东吉熙安电缆附件有限公司 | Voltage test connector for switching device |
| CN203983533U (en) * | 2014-07-31 | 2014-12-03 | 西安神电高压电器有限公司 | A kind of jockey |
| CN204349234U (en) * | 2015-01-05 | 2015-05-20 | 熊宏兵 | A kind of A, C phase insulated busbar system |
| CN105226479B (en) * | 2015-09-28 | 2017-08-25 | 平高集团有限公司 | A kind of preparation method of tubular type conducting rod, hydraulic bulging device and tubular type conducting rod |
| CN206340936U (en) * | 2016-08-30 | 2017-07-18 | 江苏华强电力设备有限公司 | A kind of insulation of second third copper pipe bus transition joint annex |
| CN207021629U (en) * | 2017-07-25 | 2018-02-16 | 广东吉熙安电缆附件有限公司 | A kind of pipe bus connection structure for switch cubicle |
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