CN211699955U - Grounding structure of three-phase dry-type transformer - Google Patents

Abstract

The utility model relates to a ground structure of three-phase dry-type transformer, including transformer body, transformer body's upper end is equipped with the first lead-out wire of connecting three-phase coil respectively and protruding stretching up, second lead-out wire and third lead-out wire, transformer body's upper end still is equipped with the zero line copper bar of connecting three-phase coil, zero line copper bar violently establishes at the rear side of first lead-out wire, second lead-out wire and third lead-out wire, and the zero line copper bar is equipped with overhanging end, overhanging end stretches out one side of first lead-out wire and keeps away from second lead-out wire and third lead-out wire relatively, overhanging serving is equipped with the ground terminal. The utility model has simple structure, scientific and reasonable structure, easy manufacture and convenient wiring installation by grounding the grounding terminal; meanwhile, the zero line copper bar is designed, so that materials are saved, energy consumption is reduced, the effects of material saving and consumption reduction are achieved, the manufacturing cost is reduced, and zero line leading-out ends are arranged in the direction between the first leading-out wire and the second leading-out wire of the zero line copper bar, so that the requirement of national standard specified resistance balance is met.

Description

Grounding structure of three-phase dry-type transformer

Technical Field

The utility model belongs to the technical field of the transformer technique and specifically relates to a ground structure of three-phase dry-type transformer is related to.

Background

The three-phase dry type transformer is installed in a grounding mode when being installed and used, a grounding part needs to be additionally arranged on the transformer, but the three-phase dry type transformer is integral, is heavy in weight and large in size and inconvenient to install, and can be installed conveniently and the usability of the transformer can be improved only by a reasonable and reliable grounding structure. Therefore, the applicant provides a grounding structure of a three-phase dry-type transformer, namely the application.

Disclosure of Invention

An object of the utility model is to provide a three-phase dry-type transformer's ground structure, simple structure, scientific and reasonable, the preparation is easy, easy to assemble.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a ground structure of three-phase dry-type transformer, including the transformer body, the upper end of this transformer body is equipped with the first lead-out wire, second lead-out wire and the third lead-out wire of connecting the three-phase coil respectively and protruding stretching up, the upper end of this transformer body still is equipped with the zero line copper bar of connecting the three-phase coil, this zero line copper bar is violently established in the rear side of first lead-out wire, second lead-out wire and third lead-out wire, and the zero line copper bar is equipped with overhanging end, this overhanging end stretches out one side of first lead-out wire and keeps away from second lead-out wire and third lead-out wire relatively, overhanging serving is equipped with.

According to the scheme, the first outgoing line is connected with the phase a of the transformer body, the second outgoing line is connected with the phase b of the transformer body, the third outgoing line is connected with the phase c of the transformer body, and the zero line outgoing end is arranged in the position, between the first outgoing line and the second outgoing line, of the zero line copper bar.

The grounding terminal of the zero line copper bar is flat, and the grounding terminal is provided with a mounting through hole which is used for being matched with a bolt to lock and conduct the outer grounding piece and the grounding terminal.

In the above scheme, the external grounding piece is provided with a U-shaped clamping groove, the external grounding piece clamps the front and rear side surfaces of the grounding terminal through the U-shaped clamping groove, and the bolt sequentially penetrates through the external grounding piece and the grounding terminal to be locked.

Further, the inner side wall of the U-shaped clamp groove of the outer grounding piece is provided with friction insections which are tightly jointed with the front side and the rear side of the grounding terminal.

The utility model discloses a transformer body's upper end is equipped with the zero line copper bar of connecting the three-phase coil, and this zero line copper bar is violently established in the rear side of first lead-out wire, second lead-out wire and third lead-out wire, and the zero line copper bar is equipped with overhanging end, and this overhanging end is equipped with the ground terminal, does ground connection installation through this ground terminal from this, simple structure, scientific and reasonable, and the preparation is easy, facilitates the wiring installation; meanwhile, the zero line copper bar is designed, so that materials are saved, energy consumption is reduced, the effects of saving materials and reducing consumption are achieved, and the manufacturing cost is reduced. Furthermore, the zero line copper bar is provided with a zero line leading-out end in the direction between the first leading-out wire and the second leading-out wire, so that the requirement of national standard on resistance balance is met.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the ground connection of the embodiment of fig. 1.

The specific implementation mode is as follows:

the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 and 2, it is the intention of the preferred embodiment of the present invention, the present invention relates to a grounding structure of a three-phase dry-type transformer, including a transformer body 1, the transformer body 1 has a phase, b phase and c phase, a first outgoing line 11, a second outgoing line 12 and a third outgoing line 13 are provided at the upper end of the transformer body 1, the first outgoing line 11, the second outgoing line 12 and the third outgoing line 13 are respectively connected to a three-phase coil and protrude upwards, a zero line copper bar 2 connected to the three-phase coil is further provided at the upper end of the transformer body 1, the zero line copper bar 2 is transversely provided at the rear side of the first outgoing line 11, the second outgoing line 12 and the third outgoing line 13, the distribution is convenient, the zero line copper bar 2 is provided with an overhanging end 21, the overhanging end 21 stretches out one side of the first outgoing line 11 and relatively keeps away from the second outgoing line 12 and the third outgoing. The grounding terminal 211 is used for grounding installation, so that the structure is simple, scientific and reasonable, the manufacture is easy, and the installation is convenient; meanwhile, the zero line copper bar is designed, so that materials are saved, energy consumption is reduced, the effects of saving materials and reducing consumption are achieved, and the manufacturing cost is reduced.

As shown in fig. 1 and 2, in this embodiment, the first outgoing line 11 is connected to the phase a of the transformer body 1, the second outgoing line 12 is connected to the phase b of the transformer body 1, the third outgoing line 13 is connected to the phase c of the transformer body 1, and the zero line outgoing end 22 is arranged in the direction between the first outgoing line 11 and the second outgoing line 12 of the zero line copper bar 2, that is, in the middle of the connection line between the phase a and the phase b, zero-ground separated connection and convenient connection are realized, and the structure meets the requirement of national standard for resistance balance, and can optimize the manufacturing requirement of the zero line copper bar 2, thereby achieving the effects of saving materials and reducing consumption.

As shown in fig. 1 and 2, in this embodiment, the ground terminal 211 of the neutral copper bar 2 is flat, and the ground terminal 211 is provided with a mounting through hole 212, where the mounting through hole 212 is used for being matched with the bolt 3 to lock and conduct the external ground piece 4 and the ground terminal 211. Further, the outer ground contact 4 has a U-shaped clip groove 41, the outer ground contact 4 clips front and rear side surfaces of the ground terminal 211 through the U-shaped clip groove 41, and the bolt 3 is sequentially passed through the outer ground contact 4 and the ground terminal 211 to be locked. Further, the inner side wall of the U-shaped clamping groove 41 of the outer grounding piece 4 is provided with friction insection 411, and the friction insection 411 is tightly jointed with the front and back sides of the grounding terminal 211. Through bolt 3 lock joint, realize that the left and right walls of U-shaped double-layered groove 41 of outer ground connection piece 4 are close the centre gripping relatively, the friction insection 411 of U-shaped double-layered groove 41 inside wall closely engages the front and back side of ground terminal 211, firm in connection, ground connection switches on well, promotes the ground effect.

The present invention has been described in detail with reference to the embodiments, and only for the purpose of illustrating the technical concept and features of the present invention, the present invention is intended to be understood and implemented by those skilled in the art, and the protection scope of the present invention can not be limited thereby, so that equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (5)

1. The utility model provides a ground structure of three-phase dry-type transformer, is equipped with first lead-out wire (11), second lead-out wire (12) and third lead-out wire (13) that connect the three-phase coil respectively and stretch protruding upwards including transformer body (1) the upper end of this transformer body (1), its characterized in that: the upper end of this transformer body (1) still is equipped with zero line copper bar (2) of connecting the three-phase coil, and this zero line copper bar (2) are violently established in the rear side of first lead-out wire (11), second lead-out wire (12) and third lead-out wire (13), and zero line copper bar (2) are equipped with overhanging end (21), and this overhanging end (21) stretch out one side of first lead-out wire (11) and keep away from second lead-out wire (12) and third lead-out wire (13) relatively, are equipped with ground terminal (211) on overhanging end (21).

2. The grounding structure of a three-phase dry-type transformer according to claim 1, wherein: the first outgoing line (11) is connected with the phase a of the transformer body (1), the second outgoing line (12) is connected with the phase b of the transformer body (1), the third outgoing line (13) is connected with the phase c of the transformer body (1), and a zero line outgoing end (22) is arranged in the direction of the zero line copper bar (2) between the first outgoing line (11) and the second outgoing line (12).

3. The grounding structure of a three-phase dry-type transformer according to claim 1, wherein: the grounding terminal (211) of the zero line copper bar (2) is flat, the grounding terminal (211) is provided with a mounting through hole (212), and the mounting through hole (212) is used for being matched with a bolt (3) to lock and conduct the outer grounding piece (4) and the grounding terminal (211).

4. The grounding structure of a three-phase dry-type transformer according to claim 3, wherein: the outer grounding piece (4) is provided with a U-shaped clamping groove (41), the outer grounding piece (4) clamps the front side surface and the rear side surface of the grounding terminal (211) through the U-shaped clamping groove (41), and the bolt (3) sequentially penetrates through the outer grounding piece (4) and the grounding terminal (211) to be locked.

5. The grounding structure of a three-phase dry-type transformer according to claim 4, wherein: the inner side wall of the U-shaped clamping groove (41) of the outer grounding piece (4) is provided with friction insection (411), and the friction insection (411) is tightly jointed with the front side surface and the rear side surface of the grounding terminal (211).

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