CN220189422U - Three-phase common external current transformer for GIS equipment - Google Patents
Three-phase common external current transformer for GIS equipment Download PDFInfo
- Publication number
- CN220189422U CN220189422U CN202321539614.8U CN202321539614U CN220189422U CN 220189422 U CN220189422 U CN 220189422U CN 202321539614 U CN202321539614 U CN 202321539614U CN 220189422 U CN220189422 U CN 220189422U
- Authority
- CN
- China
- Prior art keywords
- transition flange
- end plate
- gis equipment
- current transformer
- external current
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 74
- 230000007704 transition Effects 0.000 claims abstract description 55
- 230000001681 protective effect Effects 0.000 claims abstract description 30
- 238000004804 winding Methods 0.000 claims abstract description 25
- 239000003822 epoxy resin Substances 0.000 claims abstract description 4
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a three-phase common external current transformer for GIS equipment, which comprises an end plate and three supporting cylinders connected with the end plate, wherein a CT winding is arranged outside the supporting cylinders and is solidified into a whole through epoxy resin, the end plate and the supporting cylinders are of an integrated structure, the three supporting cylinders are uniformly distributed at the center of the end plate, a transition flange connected with the GIS equipment is arranged at the upper end of the supporting cylinders, an insulating plate is arranged between the transition flange and the supporting cylinders and fixedly connected with the three, a sealing groove is arranged at the joint of the supporting cylinders and the transition flange and is embedded with the sealing ring, a cylindrical protective shell is connected between the end plate and the transition flange, the protective shell covers the CT winding, the upper end of the protective shell is provided with an assembly edge, the assembly edge is fixed with the upper end face of the transition flange and is embedded with the sealing ring, and the lower end of the protective shell is fixed with the outer side face of the end plate. The utility model has compact structure, good sealing effect at the insulation partition, firm connection with GIS equipment, good sealing performance, good waterproof and dustproof effects and greatly improved safety.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to a three-phase common external current transformer for GIS equipment.
Background
The current transformer for the GIS (Gas Insulated Switchgear, gas-insulated switchgear) is a protection and measurement unit of the GIS equipment, and is divided into an internal type (the secondary coil is located inside the gas chamber) and an external type (the secondary coil is located outside the gas chamber) according to the positional relationship between the secondary coil and the gas chamber.
The built-in current transformer is arranged in GIS equipment, SF6 gas is used as a surrounding medium of a current transformer coil, and the production environment, material selection and process requirements of the current transformer coil are high. By adopting the built-in structure, the overall structure size of the product can be larger, the requirement on the electrode machining precision is very high, if machining defects such as poor surface roughness and the like exist, the quality accident of product discharge is easy to cause, the requirements on machining and assembly are high, and the overall cost is higher.
The coil of the external current transformer is located outside SF6 gas, and is easier to control than the internal current transformer, so that the external current transformer is developed. In the prior art, a three-phase box-dividing circuit transformer is provided, and the positions of the supporting cylinders of the structure are dispersed, so that the product size is larger. In addition, the two ends of the supporting cylinder body are required to be connected with GIS equipment through the flange, through use, the internal sealing of the current transformer and the sealing when the current transformer is connected with the GIS equipment are required to be improved, because the insulating partition is required to be formed between one end of the supporting cylinder body and the flange, the sealing performance is ensured, and meanwhile, the sealing performance is ensured to bear certain pressure, and the existing structure is difficult to consider. On the other hand, the external structure needs to be noted to be waterproof and dustproof, the existing structure of the dustproof cover can only cover the coil part, and the phenomenon of loose sealing still exists at the installation positions at the two ends of the dustproof cover.
Disclosure of Invention
In order to solve the problems, the utility model provides the three-phase common external current transformer for the GIS equipment, which has high safety, compact structure, good sealing effect at the insulation partition, firm connection with the GIS equipment and good sealing performance.
According to one aspect of the utility model, a three-phase common external current transformer for GIS equipment is provided, which comprises an end plate and three support cylinders connected to the end plate, wherein a CT winding is arranged outside the support cylinders, the end plate and the support cylinders are of an integrated structure, the three support cylinders are uniformly distributed in the center of the end plate, a transition flange connected with the GIS equipment is arranged at the upper end of the support cylinder, an insulating plate is arranged between the transition flange and the support cylinder, the transition flange, the insulating plate and the support cylinder are fixedly connected, a cylindrical protective shell is connected between the end plate and the transition flange, the protective shell covers the CT winding, and an outgoing line of the CT winding can be led out of the protective shell. From this, the position of three support barrel of rational distribution makes the structure compacter, is favorable to reducing whole current transformer's volume, and the end plate designs reducible assembly step of integral type structure with supporting the barrel, also is favorable to improving the pressure that it can bear when this current transformer and GIS equipment are assembled, makes the connection more firm.
In some embodiments, the CT winding and the supporting cylinder are solidified into a whole through epoxy resin, and a CT sealing ring is arranged between the CT winding and the end plate. Therefore, the connection firmness of the CT winding and the supporting cylinder body is favorably improved, and the tightness of the inside and the outside of the supporting cylinder body can be further improved by additionally arranging the CT sealing ring.
In some embodiments, the upper end surface of the supporting cylinder body and the lower end surface of the transition flange, which are attached to two sides of the insulating plate, are respectively provided with a first sealing groove, an O-shaped sealing ring is embedded in the first sealing groove, and the first O-shaped sealing ring is compressed when the transition flange, the insulating plate and the supporting cylinder body are fixedly connected. Therefore, the tightness among the transition flange, the insulating plate and the supporting cylinder body can be greatly improved, the insulating partition is ensured, and the tightness inside and outside the supporting cylinder body is further improved.
In some embodiments, the upper end surface of the mounting part of the transition flange and the supporting cylinder body is provided with an inward sinking platform hole, the sinking platform part of the sinking platform hole is provided with an insulating gasket, the transition flange, the insulating plate and the supporting cylinder body are fixedly connected through bolts, the bolts penetrate through the insulating gasket, and the bolts are positioned on the outer side of the O-shaped sealing ring. Therefore, the structure is sealed well, an insulating partition between the supporting cylinder body and the transition flange is effectively formed, and the end part of the bolt does not exceed the upper end surface of the transition flange, so that the tight connection between the current transformer and the GIS equipment is realized.
In some embodiments, the upper end face of the transition flange is in a step-shaped structure near the edge, a second sealing groove is arranged on the step-shaped structure, an O-shaped sealing ring II is embedded in the second sealing groove, the upper end of the protective shell is inwards bent to form a circle of assembly edge, the assembly edge is fixedly connected with the transition flange, the O-shaped sealing ring II is compressed between the transition flange and the assembly edge, and the lower end of the protective shell is fixedly connected with the outer side face of the end plate. Therefore, when the protective shell is installed, the upper part of the protective shell is coated with the upper end face and the side edges of the transition flange, the lower part of the protective shell is coated with the outer wall of the end plate, the CT winding can be coated, the joint of the two ends is seamless, and the waterproof and dustproof effects are greatly improved.
In some embodiments, the fixed connection of the protective shell, the transition flange and the end plate is coated with sealant. Thus, the sealing property can be improved.
In some embodiments, the protective housing is connected with a secondary outlet box, a terminal strip is arranged in the secondary outlet box, outgoing lines of the CT winding are arranged on the terminal strip, an outgoing line gram head is arranged on the secondary outlet box, a cover plate is arranged on the secondary outlet box, a rectangular sealing gasket is arranged between the cover plate and the secondary outlet box, the rectangular sealing gasket and the cover plate are fixedly connected. Therefore, outgoing lines of the CT winding are reasonably treated, and the secondary outgoing line box is waterproof, dustproof and good in sealing performance, and can improve safety performance.
In some embodiments, the upper end surface of the transition flange and the lower end surface of the end plate are both provided with a third sealing groove, the upper end surface of the transition flange is provided with a first threaded hole, the lower end surface of the end plate is provided with a second threaded hole, and the third sealing groove is positioned inside the first threaded hole and the second threaded hole. Therefore, when the circuit transformer is installed with GIS equipment, the sealing rings are placed in the sealing grooves at the two ends of the circuit transformer, and then the circuit transformer is tightly installed with the GIS equipment through the assembly of the screws with the first threaded holes and the second threaded holes.
In some embodiments, the three support cylinders are welded to the end plate as one piece, or the three support cylinders are cast to the end plate as one piece. Therefore, by adopting the integrated structure, the condition of loose sealing can be avoided.
Compared with the prior art, the utility model has the beneficial effects that: the three-phase common external current transformer for the GIS equipment has the advantages that three supporting cylinders are reasonably distributed, the supporting cylinders and the end plates are of an integrated structure, the integral structure is compact, the assembly difficulty is reduced, the sealing effect of the insulating partition of the transition flange and the supporting cylinders is good, the transition flange and the GIS equipment can be firmly connected, the sealing performance is good, the current transformer is external, the internal structure of the current transformer is reasonable to assemble, the sealing performance is good, the surrounding medium of a CT winding is air, and the influence of SF6 gas on the current transformer is not considered.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a three-phase common external current transformer for GIS equipment according to the present utility model;
fig. 2 is a schematic diagram of the main body of the three-phase common external current transformer in a plan view.
Detailed Description
The utility model is further described below in connection with the following detailed description.
As shown in fig. 1 and 2, the three-phase common external current transformer for GIS equipment according to the embodiment of the present utility model includes an end plate 11 and three support cylinders 12 connected to the end plate 11, a CT winding 2 is disposed outside the support cylinders 12, the CT winding 2 and the support cylinders 12 are cured into a whole by epoxy resin 6, and a CT sealing ring 22 is clamped between the CT winding 2 and the end plate 11. The end plate 11 and the supporting cylinder 12 are of an integrated structure, and the three supporting cylinders 12 are distributed in a manner that the three supporting cylinders 12 are uniformly distributed with the center of the end plate 11 as the center. A transition flange 3 connected with GIS equipment is arranged at the upper end of the support cylinder 12, an insulating plate 4 is clamped between the transition flange 3 and the support cylinder 12, and the transition flange 3, the insulating plate 4 and the support cylinder 12 are fixedly connected. A cylindrical protective casing 5 is connected between the end plate 11 and the transition flange 3, the protective casing 5 covers the CT winding 2, and the lead wires 21 of the CT winding 2 can be led out of the protective casing 5. The current transformer is external, the assembly type tightness of the internal structure is good, the surrounding medium of the CT winding 2 is air, and the influence of SF6 gas on the product is not considered.
The three support cylinders 12 and the end plate 11 may be formed as an integral structure by welding. It is also possible to cast the three support cylinders 12 directly in one piece with the end plate 11.
The three positions of the supporting cylinder 12 are reasonably distributed by the current transformer, so that the structure is more compact, the volume of the whole current transformer is reduced, the assembling steps can be reduced by designing the end plate 11 and the supporting cylinder 12 into an integrated structure, and the pressure born by the current transformer and GIS equipment is improved when the current transformer and the GIS equipment are assembled, so that the connection is firmer.
The sealing grooves I7 are formed in the upper end face of the supporting cylinder 12 and the lower end face of the transition flange 3, the sealing grooves I7 are of annular groove structures, O-shaped sealing rings I71 are embedded in the sealing grooves I7, and when the transition flange 3, the insulating plate 4 and the supporting cylinder 12 are fixedly connected, the O-shaped sealing rings I71 are compressed, so that inner and outer sealing of the supporting cylinder 12 is formed, and the sealing performance is very good.
Three sunken sinking platform holes 31 are formed in the upper end face of the mounting position of the transition flange 3 and the support cylinder 12, sinking platform parts of each sinking platform hole 31 are provided with sunk through holes through which bolts can pass, insulating washers 32 are placed in the sunk through holes, the transition flange 3, the insulating plates 4 and the support cylinder 12 are fixedly connected through bolts 33, the bolts 33 penetrate through the insulating washers 32, and the positions of the bolts 33 are located outside the O-shaped sealing rings I71. The structure is sealed well and effectively forms an insulating partition between the support cylinder 12 and the transition flange 3. In addition, the end of the bolt 33 does not exceed the upper end face of the transition flange 3, so that the tight connection of the current transformer and the GIS equipment is realized.
Specific installation of the protective housing 5: the upper end face of the transition flange 3 is provided with a step-shaped structure 34 near the edge, the step-shaped structure 34 is provided with a second sealing groove 35, the second sealing groove 35 is a circular arc-shaped groove, and an O-shaped sealing ring 36 is embedded in the second sealing groove 35. The upper end of the protective shell 5 is inwards bent to form a circle of assembly edge 51, the assembly edge 51 is fixedly connected with the transition flange 3, the O-shaped sealing ring II 36 is compressed between the transition flange 3 and the assembly edge 51, and the transition flange 3 is fixedly connected with the assembly edge 51 of the protective shell 5 through screws 52. The lower end of the protective housing 5 is fixedly connected with the outer side surface of the end plate 11 through screws 53. The screw fixing joints of the protective shell 5, the transition flange 3 and the end plate 11 are coated with sealant 54. In the assembly process of the current transformer, the assembly gap is also coated with sealant, so that the sealing effect is improved.
The protective shell 5 is fixedly connected with a secondary outlet box 8, a terminal row 81 is arranged in the secondary outlet box 8, outgoing wires 21 of the CT winding 2 are arranged on the terminal row 81, an outlet gram head 82 is arranged on the secondary outlet box 8, a cover plate 83 is arranged on the secondary outlet box, a rectangular sealing pad 84 is arranged at an opening of the secondary outlet box 8, the rectangular sealing pad 84 is clamped between the cover plate 83 and the secondary outlet box 8, the rectangular sealing pad 84 and the cover plate 83 are fixedly connected through bolts 85.
In order to realize the installation of the circuit transformer and GIS equipment, the tightness is required to be ensured during the installation. A third sealing groove 9 is formed in the upper end face of the transition flange 3 and the lower end face of the end plate 11, the third sealing groove 9 is an annular groove, a first threaded hole 37 is formed in the upper end face of the transition flange 3, the first threaded hole 37 is an internal threaded blind hole, a second threaded hole 111 is formed in the lower end face of the end plate 11, the second threaded hole 111 is an internal threaded through hole, and the third sealing groove 9 is located inside the first threaded hole 37 and the second threaded hole 111. When the circuit transformer is installed with GIS equipment, sealing rings are placed in sealing grooves III 9 at two ends of the circuit transformer, and then the circuit transformer is assembled with the first screw holes 37 and the second screw holes 111 through screws, so that the installation of the circuit transformer and the GIS equipment is realized.
The three-phase common external current transformer for the GIS equipment has the advantages of compact structure, good sealing effect at the insulation partition, firm connection with the GIS equipment and good sealing performance.
While only certain embodiments of the present utility model have been described, it will be apparent to those skilled in the art that other modifications and improvements can be made without departing from the inventive concept of the present utility model.
Claims (9)
1. The utility model provides a three-phase external current transformer of sharing body for GIS equipment, includes end plate (11), connects three support barrel (12) on end plate (11), support barrel (12) and be equipped with CT winding (2) outward, its characterized in that, end plate (11) are as an organic whole structure with support barrel (12), three support barrel (12) are evenly distributed with the center of end plate (11), the upper end of support barrel (12) is equipped with transition flange (3) that are connected with GIS equipment, be equipped with insulating board (4) between transition flange (3) and support barrel (12), just be connected with protective housing (5) of tube-shape between transition flange (2) insulating board (4) and support barrel (12), protective housing (5) cover outside CT winding (2), protective housing (5) can be drawn forth to lead-out wire (21) of CT winding (2).
2. The three-phase common external current transformer for GIS equipment according to claim 1, wherein the CT winding (2) and the supporting cylinder (12) are solidified into a whole through epoxy resin (6), and a CT sealing ring (22) is arranged between the CT winding (2) and the end plate (11).
3. The three-phase common external current transformer for GIS equipment according to claim 2, wherein the upper end face of the supporting cylinder body (12) and the lower end face of the transition flange (3) attached to two sides of the insulating plate (4) are respectively provided with a first sealing groove (7), an O-shaped sealing ring (71) is embedded in the first sealing groove (7), and the first O-shaped sealing ring (71) is compressed when the transition flange (3), the insulating plate (3) and the supporting cylinder body (12) are fixedly connected.
4. A three-phase common external current transformer for GIS equipment according to claim 3, wherein the upper end surface of the installation part of the transition flange (3) and the supporting cylinder body (12) is provided with an inward sinking platform hole (31), the sinking platform part of the sinking platform hole (31) is provided with an insulating gasket (32), the transition flange (3), the insulating plate (4) and the supporting cylinder body (12) are fixedly connected through bolts (33), the bolts (33) penetrate through the insulating gasket (32), and the bolts (33) are positioned outside the first O-shaped sealing ring (71).
5. The three-phase common external current transformer for GIS equipment according to any one of claims 1 to 4, wherein the upper end face of the transition flange (3) is provided with a step-shaped structure (34) near the edge, the step-shaped structure (34) is provided with a second sealing groove (35), an O-shaped sealing ring (36) is embedded in the second sealing groove (35), the upper end of the protective shell (5) is inwards bent to form a circle of assembly edge (51), the assembly edge (51) is fixedly connected with the transition flange (3), the second O-shaped sealing ring (36) is compressed between the transition flange (3) and the assembly edge (51), and the lower end of the protective shell (5) is fixedly connected with the outer side face of the end plate (11).
6. The three-phase common external current transformer for GIS equipment according to claim 5, wherein the fixed connection parts of the protective shell (5) and the transition flange (3) and the end plate (11) are coated with sealant.
7. The three-phase external current transformer for GIS equipment according to claim 6, wherein the protective housing (5) is connected with a secondary outlet box (8), a terminal row (81) is arranged in the secondary outlet box (8), the outgoing line (21) of the CT winding (2) is arranged on the terminal row (81), an outlet gram head (82) is arranged on the secondary outlet box (8), a cover plate (83) is arranged on the secondary outlet box (8), a rectangular sealing pad (84) is arranged between the cover plate (83) and the secondary outlet box (8), the rectangular sealing pad (84) and the cover plate (83) are fixedly connected.
8. The three-phase common external current transformer for GIS equipment according to claim 7, wherein the upper end face of the transition flange (3) and the lower end face of the end plate (11) are respectively provided with a third sealing groove (9), the upper end face of the transition flange (3) is provided with a first threaded hole (37), the lower end face of the end plate (11) is provided with a second threaded hole (111), and the third sealing grooves (9) are respectively positioned on the inner sides of the first threaded hole (37) and the second threaded hole (111).
9. The three-phase common external current transformer for GIS equipment according to claim 1, wherein three supporting cylinders (12) and the end plate (11) are welded and fixed into a whole, or three supporting cylinders (12) and the end plate (11) are cast into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321539614.8U CN220189422U (en) | 2023-06-16 | 2023-06-16 | Three-phase common external current transformer for GIS equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321539614.8U CN220189422U (en) | 2023-06-16 | 2023-06-16 | Three-phase common external current transformer for GIS equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220189422U true CN220189422U (en) | 2023-12-15 |
Family
ID=89106439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321539614.8U Active CN220189422U (en) | 2023-06-16 | 2023-06-16 | Three-phase common external current transformer for GIS equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220189422U (en) |
-
2023
- 2023-06-16 CN CN202321539614.8U patent/CN220189422U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6035224Y2 (en) | Instrument transformer mounting device for high voltage switchgear equipment with metal capsule | |
| CN220189422U (en) | Three-phase common external current transformer for GIS equipment | |
| WO2009135741A1 (en) | Draw rod mounting arrangement for a high voltage bushing, high voltage bushing comprising such arrangement and high voltage device comprising bushing with such arrangement | |
| CN101667720A (en) | Insulating sleeve of high-voltage fuse for sulfur hexafluoride gas insulation switch cabinet | |
| CN218958519U (en) | Novel compound sleeve type outdoor terminal | |
| CN201036152Y (en) | Voltage mutual inductor for looped network cabinet | |
| CN205609429U (en) | Aerify for cabinet heavy current and seal utmost point post admittedly | |
| CN201927460U (en) | Low-voltage outgoing line terminal board for traction transformer of electric locomotive | |
| CN115798871B (en) | Oil-gas isolation device of switching all-in-one machine | |
| CN220963020U (en) | TPY current transformer structure | |
| CN205582667U (en) | Sleeve pipe current transformer mounting structure | |
| CN210640112U (en) | SF6 gas insulation current transformer universal wiring board structure | |
| CN111768958A (en) | Transformer bushing | |
| CN218333589U (en) | Flexible assembled C-GIS gas-filled cabinet breaker | |
| CN109449040B (en) | Circuit breaker | |
| CN220106147U (en) | Basin-type insulator, switch equipment and power system | |
| CN216051911U (en) | Electronic voltage transformer | |
| CN209912651U (en) | Pour insulating voltage transformer | |
| CN213400757U (en) | Protective box type current transformer | |
| CN111354521A (en) | Pillar insulating part for solid cabinet | |
| CN219457480U (en) | Coil assembly and contactor | |
| CN216284905U (en) | Power transmission and transformation equipment thing networking type SF6 little water measuring transducer | |
| CN215452302U (en) | GIS shell with reserved clamping holes convenient to assemble | |
| CN219393163U (en) | External current transformer special sealing structure for GIS | |
| CN211508801U (en) | External-division motor junction box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |