CN213303876U - Combined current transformer - Google Patents
Combined current transformer Download PDFInfo
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- CN213303876U CN213303876U CN202021526755.2U CN202021526755U CN213303876U CN 213303876 U CN213303876 U CN 213303876U CN 202021526755 U CN202021526755 U CN 202021526755U CN 213303876 U CN213303876 U CN 213303876U
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Abstract
The utility model relates to a combined current transformer; this combination formula current transformer includes: the current transformer comprises a current transformer body, a breaker contact box, a boss, a bus lapping block and a secondary wiring terminal; the secondary wiring terminal is arranged on the current transformer body; a primary coil inside the current transformer body is directly connected with a copper insert inside a contact box of the circuit breaker, and then poured and fused into a whole through an external insulating material; bosses extend out of two sides of the current transformer body, the bosses on the two sides and the current transformer body form an accommodating cavity, and the bus lapping block extends out of the current transformer body and is positioned in the accommodating cavity; the bus lapping block is vertically arranged perpendicular to the current transformer body, and the extended bus lapping block is completely shielded in an accommodating cavity formed by the boss. The utility model discloses unite two into one mutual-inductor and circuit breaker contact box, shortened the distance between contact box to the mutual-inductor, practiced thrift generating line between the two, improve the insulating level in the distance between the two. The depth of the whole cabinet is reduced.
Description
Technical Field
The utility model relates to a current transformer, concretely relates to simple structure, it is insulating effectual, save space, with the inside primary coil of current transformer body and the inside copper insert lug connection of circuit breaker contact box, the combination formula current transformer who fuses as an organic whole is pour to the outside insulating material of rethread.
Background
The current transformer is a main element of a high-voltage switch cabinet and consists of a body poured by insulating materials, an internal electric coil, an exposed primary bus lapping block and a secondary junction box. The insulation distance in the switch cabinet is determined by the body structure and the bus lapping mode, and the overall size of the switch cabinet is also influenced. Because the insulation distance between the electrified body in traditional size cubical switchboard satisfies national standard requirement completely, current pillar type current transformer's generating line overlap joint piece is the flush-mounting overlap joint of the generating line preparation of being convenient for, and body insulation design also only considers reduction space and prevents the creepage, need not to do for the electrical insulation between the three-phase generating line overlap joint and cuts off the protection. Fig. 5 is a perspective view illustrating an overall structure of a current transformer. As shown in fig. 5: the notation is as follows: the current transformer comprises a current transformer body 1 'in a common current transformer, a bus lapping block 4' in the common current transformer and a secondary junction box 7.
Along with the urban development, compared with the traditional KYN28A-12 products and the like, the miniature high-voltage switch cabinet has the advantages of more compact structure and small size, and can greatly save limited land and be widely applied.
The bus lapping structure of the existing strut type current transformer limits that the bus lapping can only be a flat lapping mode, according to the requirements of national standard GB/T11022-2011, the minimum air clear distance of a charged body in a 10kV high-voltage switch cabinet is 125mm, the minimum bus specification 60X6mm is taken as an example, the width of the switch cabinet is three-phase bus width plus three-phase bus to cabinet body minimum air clear distance, and the minimum air clear distance is 60X3+125X4 which is 680 mm. Namely, when the traditional parallel lapping current transformer is adopted, the minimum cabinet width of the high-voltage switch cabinet reaches 680 mm. The width of the conventional KYN28A-12 switch cabinet is generally 800mm, and the minimum air clear distance requirement specified by the national standard can be met.
The miniaturized 10kV air insulated switchgear is 550mm wide at most, still adopts the overlap joint mode of flush mounted bus just can not accord with the national standard requirement completely, and the miniaturized cubical switchboard of 550mm is exactly traditional current transformer flush mounted bus, then adopts the pyrocondensation insulating boot of bus suit, and the mode of installing insulating barrier additional between the three-phase bus prevents to take the insulating breakdown between the body. The method has the advantages of multiple customized accessories, high cost and high requirement on the assembly process, and does not meet the requirement that the thermal shrinkage insulating sleeve cannot reduce the insulating distance between the charged bodies in the national standard.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, an object of the present invention is to provide a combined current transformer which has a simple structure, good insulation effect, space saving, direct connection of a primary coil inside the current transformer body and a copper insert inside the contact box of the circuit breaker, and integration of the primary coil and the copper insert into a whole by pouring of an external insulation material.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: a combined current transformer; the combined current transformer includes: the current transformer comprises a current transformer body, a breaker contact box, a boss, a bus lapping block and a secondary wiring terminal;
the secondary wiring terminal is arranged on the current transformer body;
a primary coil inside the current transformer body is directly connected with a copper insert inside a contact box of the circuit breaker, and then poured and fused into a whole through an external insulating material;
bosses extend out of two sides of the current transformer body, the bosses on the two sides and the current transformer body form an accommodating cavity, and the bus lapping block extends out of the current transformer body and is positioned in the accommodating cavity; the bus lapping block is vertically arranged perpendicular to the current transformer body, and the extended bus lapping block is completely shielded in an accommodating cavity formed by the boss.
In the embodiment of the present invention: the height of the outmost end of the bus bar overlapping block is shorter than that of the outmost end of the lug boss.
In the embodiment of the present invention: the left side wall and the right side wall of the current transformer body are poured by epoxy resin to form a boss, and the boss extends to protrude out of the current transformer body.
In the embodiment of the present invention: the length of the part, extending out of the current transformer body, of the bus lapping block is as follows: 60-80 mm.
In the embodiment of the present invention: the containing cavity is n-shaped with a narrow top and a wide bottom.
In the embodiment of the present invention: the thickness range of the current transformer body is as follows: 140-.
In the embodiment of the present invention: the bus bar overlapping block is positioned on one side of the left side wall or the right side wall of the boss, and the bus bar which is overlapped out on the bus bar overlapping block is arranged in the middle of the accommodating cavity.
The utility model discloses an actively advance the effect and lie in: the utility model provides a combination formula current transformer has following advantage: the utility model discloses simple structure, it is insulating effectual, save space, with the inside primary coil of current transformer body and the inside copper insert lug connection of circuit breaker contact box, the integration is pour to the outside insulating material of rethread. The utility model discloses unite two into one mutual-inductor and circuit breaker contact box, shortened the distance between contact box to the mutual-inductor, practiced thrift generating line between the two, improve the insulating level in the distance between the two. The depth of the whole cabinet is reduced.
Drawings
Fig. 1 is a front view of the overall structural schematic diagram of the combined current transformer provided by the present invention.
Fig. 2 is a left side view of the overall structure schematic diagram of the combined current transformer provided by the utility model.
Fig. 3 is a right side view of the overall structure schematic diagram of the combined current transformer provided by the present invention.
Fig. 4 is a perspective view of the overall structure schematic diagram of the combined current transformer provided by the present invention.
Fig. 5 is a perspective view illustrating an overall structure of a current transformer.
The utility model discloses the name that well reference numeral corresponds:
the current transformer comprises a current transformer body 1, a breaker contact box 2, a boss 3, a bus overlapping block 4, a secondary wiring terminal 5 and an accommodating cavity 6. The current transformer comprises a current transformer body 1 'in a common current transformer, a bus lapping block 4' in the common current transformer and a secondary junction box 7.
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
Fig. 1 is a front view of the overall structural schematic diagram of the combined current transformer provided by the present invention. Fig. 2 is a left side view of the overall structure schematic diagram of the combined current transformer provided by the utility model. Fig. 3 is a right side view of the overall structure schematic diagram of the combined current transformer provided by the present invention. Fig. 4 is a perspective view of the overall structure schematic diagram of the combined current transformer provided by the present invention. As shown in fig. 1-4, the utility model provides a combined current transformer; this combination formula current transformer includes: the current transformer comprises a current transformer body 1, a breaker contact box 2, a boss 3, a bus lapping block 4 and a secondary wiring terminal 5; the secondary wiring terminal 5 is arranged on the current transformer body 1; the inside primary coil of current transformer body 1 and the inside copper insert lug connection of circuit breaker contact box 2, the integration is pour to the outside insulating material of rethread.
The height of the outmost end of the bus bar overlapping block 4 is shorter than that of the outmost end of the boss 3. In a specific implementation process, the length of the part of the bus bar overlapping block 4 extending out of the current transformer body is as follows: 60-80 mm.
The left side wall and the right side wall of the current transformer body 1 are poured by epoxy resin to form a boss 3, and the boss 3 extends to protrude out of the current transformer body 1.
The accommodation chamber 6 is n-shaped with a narrow top and a wide bottom, as shown in fig. 2 to 4.
In a specific implementation process, the thickness range of the current transformer body 1 is as follows: 140-. Other parameters may also be selected during the particular implementation.
In the specific assembling process, the bus bar overlapping block 4 is positioned on one side of the left side wall or the right side wall of the boss 3, and the bus bar overlapped on the bus bar overlapping block 4 is arranged in the middle of the accommodating cavity 6.
The utility model discloses well generating line overlap joint piece 4 is changed into with body vertically to erect the dress formula by the flush-mounted formula parallel with the body, and the generating line overlap joint piece 4 that stretches out shields having that is formed at boss 3 completely and holds the intracavity. The utility model discloses pour the primary coil of 1 inside of current transformer body and the inside copper insert lug connection of circuit breaker contact box 2, the integration is pour to the outside insulating material of rethread.
The utility model discloses a bus bar overlap joint piece 4 also can remain the flush mounting formula design parallel with current transformer body 1, nevertheless requires to stretch out the generating line of 3 parts of boss must be in safe electrical insulation protection, for example extension earthing switch bus bar overlap joint box to mutual-inductor boss below, or increase alternate insulation board.
The utility model discloses unite two into one mutual-inductor and circuit breaker contact box, shortened the distance between contact box to the mutual-inductor, practiced thrift generating line between the two, improve the insulating level in the distance between the two. The depth of the whole cabinet is reduced.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (7)
1. A combined current transformer; the method is characterized in that: the combined current transformer includes: the current transformer comprises a current transformer body, a breaker contact box, a boss, a bus lapping block and a secondary wiring terminal;
the secondary wiring terminal is arranged on the current transformer body;
a primary coil inside the current transformer body is directly connected with a copper insert inside a contact box of the circuit breaker, and then poured and fused into a whole through an external insulating material;
bosses extend out of two sides of the current transformer body, the bosses on the two sides and the current transformer body form an accommodating cavity, and the bus lapping block extends out of the current transformer body and is positioned in the accommodating cavity; the bus lapping block is vertically arranged perpendicular to the current transformer body, and the extended bus lapping block is completely shielded in an accommodating cavity formed by the boss.
2. The combined current transformer of claim 1, wherein the height of the outermost end of the busbar overlapping block is shorter than the height of the outermost end of the boss.
3. The combined current transformer of claim 1, wherein the left and right side walls of the current transformer body are cast with epoxy to form bosses extending beyond the current transformer body.
4. The combined current transformer of claim 1, wherein the bus bar overlapping block protrudes from the current transformer body by a length of: 60-80 mm.
5. The combined current transformer of claim 1, wherein the receiving cavity is n-shaped with a narrow top and a wide bottom.
6. The combined current transformer of claim 1, wherein the thickness of the current transformer body is in the range of: 140-.
7. The combined current transformer of claim 1, wherein the busbar overlapping block is located on one side of the left side wall or the right side wall of the boss, and the busbar overlapped on the busbar overlapping block is located in the middle of the accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021526755.2U CN213303876U (en) | 2020-07-28 | 2020-07-28 | Combined current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021526755.2U CN213303876U (en) | 2020-07-28 | 2020-07-28 | Combined current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213303876U true CN213303876U (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021526755.2U Active CN213303876U (en) | 2020-07-28 | 2020-07-28 | Combined current transformer |
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| CN (1) | CN213303876U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793742A (en) * | 2021-08-03 | 2021-12-14 | 河南平高通用电气有限公司 | Strut type current transformer and switch cabinet |
-
2020
- 2020-07-28 CN CN202021526755.2U patent/CN213303876U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793742A (en) * | 2021-08-03 | 2021-12-14 | 河南平高通用电气有限公司 | Strut type current transformer and switch cabinet |
| CN113793742B (en) * | 2021-08-03 | 2024-04-02 | 河南平高通用电气有限公司 | Pillar type current transformer and switch cabinet |
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