CN211828653U

CN211828653U - Small-sized leakage circuit breaker with static contact piece directly penetrating zero sequence transformer

Info

Publication number: CN211828653U
Application number: CN202020900471.9U
Authority: CN
Inventors: 吴磊
Original assignee: Gret Electric Co ltd
Current assignee: Gret Electric Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-10-30
Anticipated expiration: 2030-05-26

Abstract

A small-sized leakage circuit breaker with a static contact piece directly penetrating through a zero sequence transformer. The problem of current zero sequence transformer department's structure complicacy, damage zero sequence transformer easily in the assembling process is solved. The novel zero sequence transformer comprises a shell, wherein a static contact piece, a movable contact piece, a zero sequence transformer, a wiring terminal and a first arc striking piece are arranged in the shell, one end of the static contact piece is connected with the wiring terminal, the other end of the static contact piece penetrates through the zero sequence transformer, the movable contact piece is provided with a first position separated from the static contact piece and a second position attached to the static contact piece, and the first arc striking piece is detachably connected with the static contact piece. The beneficial effects of the utility model are that, the static contact can be dismantled with first run-on plate and be connected for first run-on plate puts aside the back, and the static contact can directly pass zero sequence transformer, has simplified equipment, the maintenance process of zero sequence transformer department, avoids adopting welding damage zero sequence transformer simultaneously, makes product long service life.

Description

Small-sized leakage circuit breaker with static contact piece directly penetrating zero sequence transformer

Technical Field

The utility model relates to a 1PN miniature leakage circuit breaker's zero sequence transformer technology equipment, concretely relates to zero sequence transformer's miniature leakage circuit breaker is directly worn to static contact.

Background

The miniature circuit breaker is a current-limiting type circuit breaker with overload and short-circuit protection, is suitable for overload short-circuit protection of industrial and commercial lighting power distribution systems, and can also be used for infrequent on-off switching of lines under normal conditions. For monopole circuit breaker adds zero line control among the small-size electric leakage circuit breaker of 1PN, wherein monopole circuit breaker possesses the thermomagnetic dropout function, is applicable to single-phase two-wire system return circuit, is used for controlling live wire (phase line) usually, and the N utmost point is zero line control (N line). The hole of small-size earth leakage circuit breaker's zero sequence current transformer is very little, especially the integral type earth leakage circuit breaker of little volume, its compact structure, zero sequence current transformer's hole is littleer, what adopt mostly is the flexible coupling mode, pass zero sequence current transformer with the flexible coupling earlier, then spot welding processing rigid coupling, the very easy damaged zero sequence current transformer of this kind of technology, and static contact and arc guiding piece adopt the welding formula structure of becoming an organic whole usually, damage zero sequence current transformer easily when the welding promptly, need wholly demolish the change when the maintenance, and is with high costs.

SUMMERY OF THE UTILITY MODEL

For the structure of solving current zero sequence transformer department among the background art is complicated, damage zero sequence transformer's problem easily in the assembling process, the utility model provides a zero sequence transformer's small-size earth leakage circuit breaker is directly worn to static contact.

The technical scheme of the utility model is that: a small-sized leakage circuit breaker with a static contact piece directly penetrating through a zero sequence transformer comprises a shell, wherein the shell is internally provided with the static contact piece, a movable contact piece, the zero sequence transformer, a wiring terminal and a first arc striking piece, one end of the static contact piece is connected with the wiring terminal, the other end of the static contact piece penetrates through the zero sequence transformer, the movable contact piece is provided with a first position separated from the static contact piece and a second position attached to the static contact piece, and the first arc striking piece and the static contact piece are detachably connected.

As an improvement of the utility model, the static contact include the wiring portion that is connected with binding post and the contact portion with movable contact looks adaptation, the contact portion form the level difference through connecting portion and wiring portion.

As a further improvement of the utility model, the connecting portion locate the cover at zero sequence transformer to be equipped with the pyrocondensation pipe.

As a further improvement of the utility model, the first arc striking piece is laminated with the static contact piece through the lap joint.

As a further improvement, the shell on which the mounting groove is arranged, the first arc striking piece and the static contact piece are both arranged to pass through the mounting groove and are mutually overlapped and laminated at the mounting groove.

As a further improvement of the utility model, the shell on be equipped with two baffles, two the baffle mutually support and form the mounting groove.

As a further improvement of the utility model, the casing be equipped with the backup pad in mounting groove department, first run-on arc piece all locate in the backup pad with the static contact.

As a further improvement, the first arc striking piece on be equipped with to the convex arc portion of leading of movable contact spring direction and be the overlap joint portion of invering the L type setting, overlap joint portion and static contact piece overlap joint laminating formation face contact mutually.

As a further improvement, the casing in be equipped with and lead the arc passageway, spout arc mouth, second run-on piece, first run-on piece locate to be close to static contact department and extend to the arc passageway, the one end of second run-on piece insert and lead in the arc passageway and to spouting the arc mouth extension.

As a further improvement, the casing in be equipped with release and control scheme board, zero sequence transformer be connected with the control scheme board electricity, the control scheme board pass through the motion of release drive movable contact spring.

The beneficial effects of the utility model are that, the static contact can be dismantled with first run-on plate and be connected for first run-on plate puts aside the back, and the static contact can directly pass zero sequence transformer, has simplified equipment, the maintenance process of zero sequence transformer department, avoids adopting welding damage zero sequence transformer simultaneously, makes product long service life. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, advantages such as long service life.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the housing in fig. 1.

Fig. 3 is a schematic structural diagram of the zero sequence transformer 4 in fig. 2.

Fig. 4 is a schematic structural view of the stationary contact 2 and the first arc ignition sheet 6 in fig. 3.

Fig. 5 is a schematic structural diagram of the static contact 2 and the zero sequence transformer 4 in fig. 3 when they are disassembled.

Fig. 6 is a schematic structural diagram of the housing 1 according to the embodiment of the present invention.

In the figure, 1, a housing; 11. mounting grooves; 12. a baffle plate; 13. a support plate; 14. an arc guide channel; 15. spraying an arc opening; 2. a static contact piece; 21. a wiring portion; 22. a contact portion; 23. a connecting portion; 24. heat shrink tubing; 3. a movable contact spring; 4. a zero sequence transformer; 5. a wiring terminal; 6. a first arc striking plate; 61. an arc guide part; 62. a lap joint section; 7. a second arc striking plate; 8. a release; 9. and a control circuit board.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

fig. 1 is combined with fig. 2-6 to show that a small-sized leakage circuit breaker with a zero sequence mutual inductor directly penetrated by a static contact piece comprises a shell 1, in the utility model, the shell usually comprises an upper cover, a middle cover and a lower cover, and fig. 6 is a schematic structural diagram of the middle cover. The shell 1 is internally provided with a static contact piece 2, a movable contact piece 3, a zero sequence transformer 4, a wiring terminal 5 and a first arc striking piece 6, one end of the static contact piece 2 is connected with the wiring terminal 5, the other end of the static contact piece passes through the zero sequence transformer 4, the movable contact piece 3 is provided with a first position separated from the static contact piece 2 and a second position attached to the static contact piece 2, and the first arc striking piece 6 is detachably connected with the static contact piece 2. The beneficial effects of the utility model are that, the static contact can be dismantled with first run-on plate and be connected for first run-on plate puts aside the back, and the static contact can directly pass zero sequence transformer, has simplified equipment, the maintenance process of zero sequence transformer department, avoids adopting welding damage zero sequence transformer simultaneously, makes product long service life. The utility model discloses simple structure still has, convenient assembling, and the action is reliable, advantages such as long service life.

The static contact piece 2 comprises a wiring part 21 connected with the wiring terminal 5 and a contact part 22 matched with the movable contact piece 3, and the contact part 22 forms a horizontal height difference with the wiring part 21 through a connecting part 23. Specifically, the connecting portion 23 is sleeved with a heat shrink tube 24 at the zero sequence transformer 4. Such structure makes the product simple structure, easy dismounting, the wiring of being convenient for, the space in the rational utilization casing.

The first arc striking piece 6 is jointed with the static contact piece 2 in an overlapping way. Specifically speaking, casing 1 on be equipped with mounting groove 11, first run-on arc piece 6 and static contact 2 all pass mounting groove 11 setting and at the mutual overlap joint laminating of mounting groove 11 department. Make static contact not need spot welding when the installation through the overlap joint, avoid influencing zero sequence transformer, when the maintenance, can take off first run-on plate for static contact can directly pass through zero sequence transformer, the dismouting maintenance of being convenient for.

The shell 1 is provided with two baffle plates 12, and the two baffle plates 12 are mutually matched to form the mounting groove 11. Specifically, the casing 1 is provided with a supporting plate 13 at the mounting groove 11, and the first arc ignition piece 6 and the static contact piece 2 are both arranged on the supporting plate 13. Such structure makes first run-on piece spacing, simple to operate, simple structure through the mounting groove on the casing. Specifically, the first arc striking piece (cathode arc striking piece) is connected with the static contact piece, the second arc striking piece (anode arc striking piece) is connected with the double-metal piece, and the arc part is arranged to enable the arc to move stably and facilitate reliable arc striking.

The first arc striking plate 6 is provided with an arc guiding part 61 protruding towards the moving contact plate 3 and an overlapping part 62 arranged in an inverted L shape, and the overlapping part 62 is overlapped and attached with the static contact plate 2 to form surface contact. The arc guiding part of the first arc striking piece is in smooth transition with the static contact on the static contact, and when the breaker is disconnected, the breaker has the characteristics of better arc striking effect and smoothness, so that the cost is saved, and the disconnection capability of a product is improved.

The shell 1 in be equipped with and lead arc passageway 14, spout arc mouth 15, second striking piece 7, first striking piece 6 locate and be close to static contact 2 department and extend to arc passageway 14, the one end of second striking piece 7 insert and lead in the arc passageway 14 and to spout arc mouth 15 extension. The structure enables electric arcs to rapidly and reliably enter the arc guide channel and be sprayed out through the arc spraying port, so that arc striking and arc extinguishing of products are reliable, and the breaking performance of the products is good.

The shell 1 is internally provided with a release 8 and a control circuit board 9, the zero sequence transformer 4 is electrically connected with the control circuit board 9, and the control circuit board 9 drives the movable contact 3 to move through the release 8. The structure ensures that the circuit breaker is reliable and convenient to trip.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. A small-sized leakage circuit breaker with a static contact piece directly penetrating through a zero sequence transformer comprises a shell (1) and is characterized in that a static contact piece (2), a movable contact piece (3), a zero sequence transformer (4), a wiring terminal (5) and a first arc striking piece (6) are arranged in the shell (1), one end of the static contact piece (2) is connected with the wiring terminal (5), the other end of the static contact piece penetrates through the zero sequence transformer (4), the movable contact piece (3) is provided with a first position separated from the static contact piece (2) and a second position attached to the static contact piece (2), and the first arc striking piece (6) is detachably connected with the static contact piece (2).

2. The small-sized residual current circuit breaker of the zero sequence transformer with the straight-through static contact as claimed in claim 1, characterized in that the static contact (2) comprises a wiring part (21) connected with the wiring terminal (5) and a contact part (22) matched with the movable contact (3), and the contact part (22) forms a horizontal height difference with the wiring part (21) through the connecting part (23).

3. The small-sized residual current circuit breaker with the static straight-through zero sequence transformer as claimed in claim 2, characterized in that the connecting portion (23) is sleeved with a heat-shrinkable tube (24) at the zero sequence transformer (4).

4. The small-sized residual current circuit breaker of the zero sequence mutual inductor with the straight-through static contact as claimed in claim 1, characterized in that the first arc striking plate (6) is attached to the static contact (2) by lapping.

5. The small-sized residual current circuit breaker with the zero sequence mutual inductor directly penetrating through the static contact as claimed in claim 4, wherein the housing (1) is provided with a mounting groove (11), the first arc striking plate (6) and the static contact (2) are arranged by penetrating through the mounting groove (11) and are mutually overlapped and attached at the mounting groove (11).

6. The small-sized residual current circuit breaker of the zero sequence transformer with the direct-through static contact as claimed in claim 5, characterized in that the housing (1) is provided with two baffles (12), and the two baffles (12) are mutually matched to form the mounting groove (11).

7. The small-sized residual current circuit breaker with the zero sequence transformer directly penetrated by the static contact as claimed in claim 5, characterized in that the casing (1) is provided with a support plate (13) at the installation groove (11), and the first arc striking plate (6) and the static contact (2) are both arranged on the support plate (13).

8. The small-sized residual current circuit breaker of the zero sequence transformer with the direct-through static contact piece as claimed in claim 5, characterized in that the first arc striking piece (6) is provided with an arc guiding part (61) protruding towards the moving contact piece (3) and an overlapping part (62) arranged in an inverted L shape, and the overlapping part (62) is overlapped and attached with the static contact piece (2) to form surface contact.

9. The small-sized residual current circuit breaker with the zero sequence transformer directly penetrated by the static contact is characterized in that an arc guiding channel (14), an arc spraying opening (15) and a second arc striking plate (7) are arranged in the shell (1), the first arc striking plate (6) is arranged close to the static contact (2) and extends towards the arc guiding channel (14), and one end of the second arc striking plate (7) is inserted into the arc guiding channel (14) and extends towards the arc spraying opening (15).

10. The small-sized residual current circuit breaker with the static-contact straight-through zero sequence transformer as claimed in claim 1, characterized in that a release (8) and a control circuit board (9) are arranged in the housing (1), the zero sequence transformer (4) is electrically connected with the control circuit board (9), and the control circuit board (9) drives the moving contact (3) to move through the release (8).