CN117476345A - 35kV fuse front plug-in C-GIS voltage transformer with a standard inner cone at the primary high voltage end - Google Patents
35kV fuse front plug-in C-GIS voltage transformer with a standard inner cone at the primary high voltage end Download PDFInfo
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- CN117476345A CN117476345A CN202311066047.3A CN202311066047A CN117476345A CN 117476345 A CN117476345 A CN 117476345A CN 202311066047 A CN202311066047 A CN 202311066047A CN 117476345 A CN117476345 A CN 117476345A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase AC
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a 35kV fuse front-plug-in type C-GIS voltage transformer with a standard inner cone at a primary high-voltage end, wherein a fuse is transversely arranged in a fuse cavity, metal contacts and an inner cone metal nut with a standard structure are respectively arranged at two ends of the fuse cavity, a high-voltage shielding device is screwed outside the metal contacts and connected with a primary wire of the voltage transformer, the primary wire is connected with a secondary lead of the voltage transformer after the voltage transformer is connected, the tail end of the secondary lead is connected with a secondary wiring metal and is fixed on a grinding tool, a high-voltage shielding device is screwed on one external thread of the inner cone metal nut with the standard structure, a primary voltage equalizing device is screwed on the other external thread of the inner cone metal nut, a spring is screwed in the metal contacts, the fuse abuts against one end of the spring, the other end of the fuse is fixed by the metal bolt in a screwed-on mode, and a user only needs to detach the cable elbow head, and the fuse can be taken out for replacement without complex operations such as dismantling the voltage transformer from a cabinet.
Description
Technical Field
The invention relates to the technical fields of measurement, protection and the like of a 35kV power system, in particular to a 35kV fuse front-plug type C-GIS voltage transformer with a primary high-voltage end of a standard inner cone or C-shaped sleeve structure.
Background
The voltage transformer used in the box-type gas-insulated metal-enclosed switchgear C-GIS (Cubicle type Gas Insulated Switchgear) cabinet adopts the structures such as an outer cone with a certain standard-structure, an inner cone with a standard-structure, a common C-shaped sleeve and the like at the primary high-voltage end, and along with the design of 'miniaturization and large parameters' direction of the switchgear in each switch factory in recent years, the structure of the primary high-voltage end of the selected voltage transformer is the standard 2# inner cone and the C-shaped sleeve, and the voltage transformer and the switchgear of the two structures are in a cable connection mode.
The phenomenon that a voltage transformer fuse is fused due to some unreliability factors can often occur in a power system, the fuse needs to be replaced at the moment, when the fuse is replaced, a traditional C-GIS voltage transformer is influenced by the structure, a high-voltage cable elbow head needs to be detached from a fixed screw of a bottom plate of the voltage transformer and removed once, a choke plug at the rear end of the voltage transformer is positioned at the innermost end of a switch cabinet, then the voltage transformer is pulled out of the cabinet, one voltage transformer has the weight of about 300 jin, the dismantling and moving difficulties are large, the fuse can be taken out only by dismantling the choke plug at the rear end of the voltage transformer by a tool and screwing out the fixed fuse bolt, and the voltage transformer needs to be returned to a primary path after the replacement is finished "
The C-GIS cabinet body is narrower than a conventional switch cabinet, and the outer surfaces of the C-GIS voltage transformers are all metal spraying technology, so that the surface of the C-GIS voltage transformers is zero in potential during operation, the distance between three voltage transformers in one cabinet is very small, and therefore the C-GIS voltage transformers are very difficult to disassemble. The whole process not only wastes time but also wastes manpower, and even scratches the metal layer on the outer surface of the voltage transformer to change the electric field distribution on the outer surface of the voltage transformer to form hidden dangers.
In order to overcome the above problems, switch cabinet manufacturers and markets are urgently required a front-plug type voltage transformer for a fuse, wherein the front-plug type voltage transformer can be used as an inlet and an outlet of the fuse when a cable elbow is connected to a primary high-voltage end, and the front-plug type voltage transformer completely abandons the conventional structure (the inlet and the outlet of the fuse of the conventional structure C-GIS voltage transformer are opposite to the primary high-voltage end in consideration of shielding effect and electric field distribution). From the theoretical angle analysis and combining the actual situation, the internal shielding structure and the external connection mode of the front plug-in voltage transformer of the fuse are completely different from the previous one, and the insulation margin requirement of the 35kV voltage transformer is large, the diameter of the fuse is large, and considering that the outer surface of the fuse is sprayed with metal shielding, the electric field distribution is extremely complex, and the partial discharge test is extremely difficult to pass, so that many transformer manufacturers are forgiving.
Disclosure of Invention
Aiming at the situation or the defect of the prior art, the invention provides a 35kV fuse front-plug TYPE C-GIS voltage transformer with a metal shielding sprayed on the outer surface, which can be a standard structure inner cone TYPE transformer or a C-TYPE sleeve TYPE structure transformer.
The technical scheme includes that the 35kV fuse front-plug type C-GIS voltage transformer with the primary high-voltage end being a standard inner cone is arranged in a fuse cavity in a transverse mode, a metal contact and an inner cone metal nut with a standard structure are arranged at two ends of the fuse cavity respectively, the metal contact is externally screwed with a high-voltage shielding device and connected with a primary wire of the voltage transformer, the primary wire is connected with a secondary lead of the voltage transformer after the voltage transformer is connected with the voltage transformer, the tail end of the secondary lead is connected with a secondary wiring metal pattern and is fixed on a die, one end of the inner cone metal nut with the standard structure is externally screwed with the high-voltage shielding device, the other end of the inner cone metal nut with the standard structure is externally screwed with a primary voltage equalizing device, a spring is screwed in the metal contact, the fuse abuts against one end of the spring, the other end of the fuse is screwed and fixed through a metal bolt, and the cavity formed by the metal bolt and the inner cone metal nut with the standard structure and the inner cone cavity with the standard structure form the standard structure inner cone.
Preferably, the high-voltage shielding device is formed by fixing the high-voltage shielding net on the metal accessory of the high-voltage shielding net through welding or riveting.
Preferably, the cable or TYPE-C insulating sleeve is fixedly installed around the inner cone cavity of the standard structure through three groups of M8 fixing inserts, and the three groups of M8 fixing inserts are distributed in a circumferential array with 120 degrees and the center phi is 102 mm.
Preferably, the outer surfaces of the metal contact and the inner cone metal nut with the standard structure are coated with the semiconductor self-adhesive tape and the semiconductor crepe paper.
Preferably, the outer surfaces of the high-voltage shielding devices are sprayed with semiconductor paint after sand blasting.
The primary high-voltage end is a 35kV fuse front-plug TYPE C-GIS voltage transformer with a TYPE-C TYPE sleeve structure, and an assembled standard structure outer cone is connected with the TYPE-C TYPE sleeve and then is inserted into a standard structure inner cone.
Preferably, the inside of the assembled outer cone of the standard structure comprises an insulating rubber sleeve fixing bolt of the standard structure, a contact finger gauge chain, an insulating rubber sleeve fixing metal piece of the standard structure, an insulating rubber sleeve of the standard structure and an insulating rubber sleeve supporting ring of the standard structure; the insulating rubber sleeve fixing metal piece and the contact finger gauge chain with the standard structure are arranged above the insulating rubber sleeve with the standard structure, and are fixed through the insulating rubber sleeve fixing bolt with the second exhaust through hole and the insulating rubber sleeve supporting ring with the standard structure is tightly fastened with the insulating rubber sleeve with the standard structure.
Preferably, the metal flange and the insulating rubber sleeve semiconductor salient point of the standard structure are further included, the metal flange penetrates through the insulating rubber sleeve of the standard structure and is fixed on the outer cone side of the unassembled standard structure through 3 screws, and the insulating rubber sleeve semiconductor salient point of the standard structure reliably contacts with the metal flange.
Preferably, the TYPE-C TYPE sleeve is internally provided with a low-voltage shielding device and a primary conducting rod with a first exhaust through hole; and (5) casting and molding through epoxy resin through a die.
Preferably, when the TYPE-C TYPE sleeve is inserted into the inner cone cavity of the standard structure, the contact finger gauge chain is in interference fit with the smooth inner wall of the inner cone metal nut with a certain standard structure.
The beneficial effects of the invention are as follows: the invention utilizes a brand new structure, optimizes electric field distribution, can spray metal shielding on the outer surface of the 35kV fuse front-plug TYPE C-GIS voltage transformer, has the partial discharge capacity far lower than the national standard requirement, can realize complete immobility of the transformer when the fuse needs to be replaced, can take out the fuse by only removing a primary cable head connected with the voltage transformer and a cabinet body and screwing out a metal bolt, is more convenient for an operator when the fuse is replaced, and can be an inner cone of a standard structure at a primary high-voltage end and also can be connected with a TYPE-C insulating sleeve, thereby meeting the multidirectional requirement of a user.
Drawings
Fig. 1 is a cross-sectional view of a casting body of a front-inserted C-GIS voltage transformer of a 35kV fuse with a standard inner cone at a primary high-voltage end.
Fig. 2 is an assembly diagram of a front-plug type C-GIS voltage transformer of a 35kV fuse with a standard inner cone at a primary high-voltage end.
Fig. 3 is a right side view of a 35kV fuse front plug-in C-GIS voltage transformer assembly with a primary high voltage end that is a standard inner cone.
Fig. 4 is a front view of a casting body of the primary TYPE-C insulating sleeve.
Fig. 5 is a cross-sectional view of a casting of a primary TYPE-C insulating sleeve.
Fig. 6 is a front view of an assembly of a TYPE-C insulating sleeve.
Fig. 7 is a sectional view of an assembly of a TYPE-C insulating sleeve.
Fig. 8 is an assembly schematic diagram of a 35kV fuse front-plug TYPE C-GIS voltage transformer assembly with a primary high-voltage end being a standard inner cone and a primary TYPE-C insulating sleeve assembly.
Fig. 9 is a cross-sectional view of a 35kV fuse front-plug C-GIS voltage transformer assembly with a TYPE-C bushing structure at a primary high voltage end. The marks in the figure: the high-voltage transformer comprises a 1-metal contact, a 2-spring, a 3-fuse cavity, a 4-fuse, a 5-high-voltage shielding net, a 6-high-voltage shielding net metal accessory, a 7-standard-structure inner cone metal nut, an 8-metal bolt, a 9-standard-structure inner cone metal nut smooth inner wall, a 10-voltage equalizing device, an 11-standard-structure inner cone cavity, a 12-M8 fixing insert, 13-epoxy resin, a 14-primary wire, a 15-voltage transformer body, a 16-secondary wire, a 17-secondary wire connection metal block, an 8-primary wire conducting rod, a 19-first exhaust through hole, a 20-low-voltage shielding device, a 21-standard-structure insulating rubber sleeve fixing bolt, a 22-second exhaust through hole, a 23-contact indicator chain, a 24-standard-structure insulating rubber sleeve fixing metal piece, a 25-standard-structure insulating rubber sleeve, a 26-standard-structure insulating rubber sleeve supporting ring, a 27-standard-structure insulating rubber sleeve semiconductor bump, a 28-metal flange, a 29-secondary wire connection cover, a 30-metal hanging ring, a 31-metal base plate, a 32-TE-C-33-standard-structure outer cone-free-structure assembly and a standard-structure outer cone-free assembly.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Aiming at the problems of the prior art that the dismantling and moving difficulty of a fuse is high, the partial discharge of the existing front-inserted transformer is unqualified, the high-voltage end of the transformer discharges to the low-voltage end, for a voltage transformer of 35kV, the thickness of a medium between the high-voltage end and the low-voltage end, namely an epoxy resin mixture, needs to be ensured to be more than 22mm, the partial discharge is not necessarily generated when the thickness is less than 22mm and is more than 20mm, the partial discharge is judged according to the appearance of an integral product in combination with electric field distribution, but the partial discharge of the high-voltage end and the low-voltage end is highly probable to generate partial discharge to destroy an insulating medium to generate discharge channel to accelerate resin aging, the difficulty in the prior art is that the front-inserted partial discharge of the fuse is qualified, the structure of the invention does not need to consider the distance between the high-voltage network and the low-voltage network, the partial discharge quantity of the 35kV front-inserted C-GIS voltage transformer with the outer surface sprayed with metal shielding is far lower than the national standard requirement by optimizing the electric field distribution, the situation that the front-inserted C-GIS voltage transformer can be realized when the fuse is required to be replaced, the complete non-movable transformer can be realized, and the high-voltage transformer can be replaced by a plug bolt with a high-voltage transformer with a high-voltage end, and the required to be conveniently replaced by a user, and a high-voltage sleeve can be conveniently and quickly replaced by a user.
The invention is divided into two structures, namely a 35kV fuse front-plug TYPE C-GIS voltage transformer with a primary high-voltage end being a standard inner cone, as shown in fig. 1-3, a 35kV fuse front-plug TYPE C-GIS voltage transformer with a primary high-voltage end being a TYPE-C TYPE sleeve structure, as shown in fig. 9-10, and a 35kV fuse front-plug TYPE C-GIS voltage transformer with a primary high-voltage end being a standard inner cone, wherein main components such as a voltage transformer body 15, a high-voltage shielding device, a metal contact 1, a metal bolt 8, a spring 2, an inner cone metal nut 7 of the standard structure, a voltage equalizing device 10 and the like are fixed in a mould by using a proper mould, and the mould is formed by casting epoxy resin, wherein the casting body is an insulator with a fuse cavity 3 and the primary high-voltage end being a standard 2# inner cone.
The prior voltage transformer with the fuse 4 is provided with a plug, the plug end is opened to take out the fuse, the plug end is positioned at the innermost end in the assembly cabinet, the transformer is required to be moved out of the assembly cabinet when the fuse is taken out, the transformer is difficult to be moved out in weight, meanwhile, the outer surface of the transformer is a metal spraying process, and the metal layer on the outer surface of the voltage transformer is scratched to change the electric field distribution on the outer surface of the transformer to form hidden dangers.
Therefore, the structure of the invention is that the plug inside is removed, the fuse 4 is arranged in the fuse cavity 3, one end of the fuse is connected with the voltage transformer body 15 through the spring 2 screwed in the metal contact 1, and the other end is screwed and fixed by the metal bolt 8 screwed in the 2# inner cone metal nut. The two ends of the fuse cavity 3 are respectively provided with a metal contact 1 and an inner cone metal nut 7 with a standard structure, and the metal contact 1 and the outer threads of the inner cone metal nut 7 with the standard structure are both screwed with a high-voltage shielding device which can shield irregular high-voltage electric fields generated by external factors such as a fuse 4 in the cavity. The outer surfaces of the metal contact 1 and the inner cone metal nut 7 with a standard structure are coated with a semiconductor self-adhesive tape and a semiconductor crepe paper. One end of the inner cone metal nut 7 with a standard structure is externally threaded with a high-voltage shielding device, and the other end is externally threaded with a primary voltage equalizing device 11. The outer surface of the high-voltage shielding device is sprayed with semiconductor paint after sand blasting, a spring is screwed in the metal contact 1, and the external thread is screwed with the high-voltage shielding device and is connected with the primary wire 14 of the voltage transformer. 3 groups of M8 fixing inserts 12 are arranged around the inner cone cavity of the standard structure of the casting body in a circumferential array with the center phi of 120 degrees and 102mm so as to fixedly install cables or primary TYPE-C TYPE insulating sleeves.
If the primary high-voltage end wants to adopt a TYPE-C TYPE sleeve structure, an inner cone of a standard structure of the casting body needs to be inserted into a TYPE-C TYPE insulating sleeve integrally cast by a primary conducting rod 18, a low-voltage shielding device 20 and epoxy resin, a fixed metal flange 28 is arranged at the joint, and one end of the TYPE-C TYPE insulating sleeve needs to be assembled with an insulating rubber sleeve of the standard structure. One end of the primary TYPE-C TYPE insulating sleeve matched with the casting body is a standard 2# outer cone, and the other end is an EN50181 TYPE C TYPE outer cone. Referring to fig. 4 to 8, the outer cone of the standard structure at one end of the primary TYPE-C insulating sleeve and the EN50181 TYPE-C outer cone share one primary conductive rod 18, that is, the primary conductive rod 18 penetrates through the whole insulating sleeve structure, and the assembled standard structure outer cone 34 internally comprises an insulating rubber sleeve fixing bolt 21 of the standard structure, a contact finger gauge chain 23, an insulating rubber sleeve fixing metal piece 24 of the standard structure, an insulating rubber sleeve 25 of the standard structure and an insulating rubber sleeve supporting ring 26 of the standard structure; the insulating rubber sleeve fixing metal piece 24 and the finger watch chain 23 with the standard structure are arranged above the insulating rubber sleeve 25 with the standard structure, and are fixed through the insulating rubber sleeve fixing bolt 21 with the standard structure and the second exhaust through hole 22, and the insulating rubber sleeve supporting ring 26 with the standard structure is tightly fastened with the insulating rubber sleeve 25 with the standard structure. The metal flange 28 passes through the insulating rubber sleeve 25 with the standard structure and is fixed on the outer cone 33 side of the unassembled standard structure through 3 screws, the insulating rubber sleeve semiconductor salient point 27 with the standard structure reliably contacts the metal flange 28, and the TYPE-C sleeve 32 is assembled with the low-voltage shielding device 20 and the primary conducting rod 18 with the first exhaust through hole 19; and when the TYPE-C sleeve 32 is inserted into the inner cone cavity 11 with the standard structure through casting molding of the epoxy resin 13 by a mold, the contact finger gauge chain 23 is in interference fit with the smooth inner wall 9 of the inner cone metal nut with a certain standard structure. The outer surface of the primary conducting rod 18 is coated with a semiconductor self-adhesive tape and a semiconductor crepe paper, and the surfaces of the casting body and the TYPE-C insulating sleeve are sprayed with a metal shield and then sprayed with insulating paint for protection.
Manufacturing method of 35kV fuse front-plug TYPE C-GIS voltage transformer with primary high-voltage end of TYPE-C TYPE sleeve structure and metal shielding sprayed on outer surface of primary high-voltage end
1. The two high-voltage shielding nets 5 are respectively fixed on the two high-voltage shielding net metal accessories 6 by welding or riveting to form two high-voltage shielding devices.
2. Two high-voltage shielding devices are respectively screwed on the external threads of the metal contact 1 and the external threads of the inner cone metal nut 7 of the standard structure, the voltage equalizing device 10 is also required to be screwed on the external threads of the other end of the inner cone metal nut 7 of the standard structure, the high-voltage shielding devices and the voltage equalizing device 10 are screwed at two ends of the inner cone metal nut 7 of the standard structure, namely, the front section shielding structure of the fuse is formed, the high-voltage shielding device is screwed on the metal contact 1, namely, the rear section shielding structure of the fuse is formed, and the two sections of shielding structures can effectively shield an uneven electric field generated by external factors such as the fuse and the like when the high voltage passes.
3. The two-stage shielding structure is secured in the mold by means of a suitable clamping fixture.
4. The voltage transformer body 15 is fixed in a mold.
5. The end of the secondary lead 16 of the voltage transformer is welded with a secondary wiring metal block 17 and fixed on a die.
6. The tail end of a primary wire 14 of a primary coil of the voltage transformer is welded on the outer wall of the metal contact 1.
7. 3M 8 fixing inserts 12 were fixed in the mold.
8. As shown in fig. 1, after the casting body with the fuse cavity 3, the smooth inner wall 9 of the inner cone metal nut with the standard structure and the inner cone cavity 11 with the standard structure is formed by casting with epoxy resin 13, the work of spraying metal shielding and protective paint on the outer surface is performed for standby (if a switch cabinet manufacturer wants to use a voltage transformer with a primary high-voltage end being the inner cone structure with the standard structure, the secondary wiring cover 29, the metal bottom plate 31 and the metal hanging ring 30 can be assembled on the voltage transformer after the step is completed, as shown in fig. 2 and 3).
9. The low voltage shielding device 20 and the primary conductive rod 18 with the exhaust through hole 19 are molded into a primary TYPE-C insulating sleeve through an appropriate mold by casting through epoxy resin 13, one side of the sleeve is a TYPE-C sleeve structure 32, and the other side is a standard 2# outer cone structure (an insulating rubber sleeve without a standard structure) namely an unassembled standard structure outer cone 33, as shown in fig. 4 and 5.
10. The insulating rubber sleeve 25 with the standard structure is inserted into the outer cone structure (not assembled with the No. 2 insulating rubber sleeve) of the standard structure of the TYPE-C insulating sleeve once, namely, the outer cone 33 side of the unassembled standard structure, the insulating rubber sleeve fixing metal piece 24 with the standard structure and the finger tab chain 23 are arranged above the insulating rubber sleeve 25 with the standard structure and are fixed through the insulating rubber sleeve fixing bolt 21 with the standard structure and provided with the exhaust through hole 22, after the bolt is screwed down, the air gap is generated at the joint of the inner wall of the insulating rubber sleeve 25 with the standard structure and the outer cone 33 with the unassembled standard structure due to deformation of the insulating rubber sleeve 25 with the interference fit standard structure, and at the moment, the insulating rubber sleeve supporting ring 26 with the standard structure plays a role of clamping the insulating rubber sleeve 25 with the standard structure and prevents the phenomenon of air gap.
11. And carrying out outer surface metal spraying process treatment on the primary TYPE-C TYPE insulating sleeve.
12. The metal flange 28 is passed through the insulating rubber bush 25 of standard structure and fixed on the unassembled outer cone 33 side of the primary TYPE-C insulating bush by 3 screws, and note here that the insulating rubber bush semiconductor bumps 27 of all standard structures are required to reliably contact the metal flange 28 to achieve the effect of shielding continuity, and by the above steps, the primary TYPE-C insulating bush shown in fig. 6 can be manufactured, with the outer cone structure 34 of standard structure (insulating rubber bush of assembled standard structure) on one side and the TYPE-C bush structure 32 on one side.
13. After a proper amount of insulating silicone grease is uniformly coated on an insulating rubber sleeve 25 of a standard structure of the primary TYPE-C insulating sleeve, the insulating rubber sleeve is slowly inserted into an inner cone cavity 11 of the standard structure of the voltage transformer, and air in the inner cone cavity 11 of the standard structure can be exhausted through an exhaust hole in the inserting process due to the interference fit effect, so that the inserting difficulty is greatly reduced. The primary TYPE-C insulating sleeve can be firmly fixed on the voltage transformer by 3M 8 fixing inserts 12, and attention is paid here to the fact that after the 3M 8 fixing inserts 12 are screwed down, the metal flange 28 needs to reliably contact the surface of the voltage transformer. As shown in fig. 8.
14. After assembly, the finger gauge chain 23 is reliably contacted with the smooth inner wall of the inner cone metal nut 9 of the standard structure, as shown in fig. 9.
15. The secondary wiring cover 29, the metal bottom plate 31 and the metal hanging ring 30 are assembled on the voltage transformer to finish manufacturing.
The user only need pull down cable elbow (cable elbow and once TYPE-C insulating cover have fixed together this moment), unscrew metal bolt 8 can take out fuse 4 and change, and need not remove loaded down with trivial details operations such as voltage transformer from the cupboard, labour saving and time saving, very convenient.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311066047.3A CN117476345A (en) | 2023-08-23 | 2023-08-23 | 35kV fuse front plug-in C-GIS voltage transformer with a standard inner cone at the primary high voltage end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311066047.3A CN117476345A (en) | 2023-08-23 | 2023-08-23 | 35kV fuse front plug-in C-GIS voltage transformer with a standard inner cone at the primary high voltage end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117476345A true CN117476345A (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311066047.3A Pending CN117476345A (en) | 2023-08-23 | 2023-08-23 | 35kV fuse front plug-in C-GIS voltage transformer with a standard inner cone at the primary high voltage end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117476345A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118335463A (en) * | 2024-06-13 | 2024-07-12 | 浙江华采科技有限公司 | Ring main unit is with measuring and power supply integration mutual-inductor |
| CN119517578A (en) * | 2024-10-12 | 2025-02-25 | 大连第一互感器有限责任公司 | Fuse front-insertion three-phase integrated voltage transformer and processing method thereof |
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| US20010044242A1 (en) * | 2000-04-04 | 2001-11-22 | Thomas & Betts International, Inc. | Elbow canister fuseholder |
| CN204156152U (en) * | 2014-10-11 | 2015-02-11 | 广东吉熙安电缆附件有限公司 | A kind of jockey being convenient to inner cone cable plug |
| CN211404274U (en) * | 2020-01-10 | 2020-09-01 | 保定百川电气科技有限公司 | Voltage transformer |
| CN216818075U (en) * | 2022-03-01 | 2022-06-24 | 微能汇通（大连）电力技术有限公司 | Voltage transformer for ring main unit convenient for replacing fuse |
| CN217444215U (en) * | 2022-05-27 | 2022-09-16 | 大连北方互感器集团有限公司 | Indoor single-phase voltage transformer with fuse |
| CN218826610U (en) * | 2022-11-11 | 2023-04-07 | 大连第二互感器集团有限公司 | Voltage transformer |
| CN219085793U (en) * | 2023-01-17 | 2023-05-26 | 大连北方互感器集团有限公司 | Single-phase all-insulated voltage transformer in harmonic elimination user |
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2023
- 2023-08-23 CN CN202311066047.3A patent/CN117476345A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010044242A1 (en) * | 2000-04-04 | 2001-11-22 | Thomas & Betts International, Inc. | Elbow canister fuseholder |
| CN204156152U (en) * | 2014-10-11 | 2015-02-11 | 广东吉熙安电缆附件有限公司 | A kind of jockey being convenient to inner cone cable plug |
| CN211404274U (en) * | 2020-01-10 | 2020-09-01 | 保定百川电气科技有限公司 | Voltage transformer |
| CN216818075U (en) * | 2022-03-01 | 2022-06-24 | 微能汇通（大连）电力技术有限公司 | Voltage transformer for ring main unit convenient for replacing fuse |
| CN217444215U (en) * | 2022-05-27 | 2022-09-16 | 大连北方互感器集团有限公司 | Indoor single-phase voltage transformer with fuse |
| CN218826610U (en) * | 2022-11-11 | 2023-04-07 | 大连第二互感器集团有限公司 | Voltage transformer |
| CN219085793U (en) * | 2023-01-17 | 2023-05-26 | 大连北方互感器集团有限公司 | Single-phase all-insulated voltage transformer in harmonic elimination user |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118335463A (en) * | 2024-06-13 | 2024-07-12 | 浙江华采科技有限公司 | Ring main unit is with measuring and power supply integration mutual-inductor |
| CN119517578A (en) * | 2024-10-12 | 2025-02-25 | 大连第一互感器有限责任公司 | Fuse front-insertion three-phase integrated voltage transformer and processing method thereof |
| CN119517578B (en) * | 2024-10-12 | 2025-07-08 | 大连第一互感器有限责任公司 | Fuse front-insertion three-phase integrated voltage transformer and processing method thereof |
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Application publication date: 20240130 |
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