CN218275783U

CN218275783U - Drawer type circuit breaker's isolation structure relatively

Info

Publication number: CN218275783U
Application number: CN202221129873.9U
Authority: CN
Inventors: 周永仟; 黄建俊; 陈芳
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2023-01-10
Anticipated expiration: 2032-05-05

Abstract

The utility model provides a drawer type circuit breaker's isolation structure relatively, it includes drawer seat (1) and circuit breaker body (2), be equipped with guide rail group (102) on curb plate (101) of drawer seat (1), slide (103) clamp and are in on guide rail group (102), be provided with on insulating bottom plate (201) of circuit breaker body (2) conductive part (202) of protrusion insulating bottom plate (201), its characterized in that: one or more of the side plate (101), the guide rail group (102) or the sliding plate (103) is/are provided with an insulating piece (104), when the circuit breaker body (2) is in a connection position with the drawer base (1), the insulating piece (104) is positioned between a conductive part (202) of the circuit breaker body (2) and the guide rail group (102) or/and the sliding plate (103) or/and the side plate (101), so that the conductive part (202) is electrically isolated from the guide rail group (102) or/and the sliding plate (103) or/and the side plate (101). The existing drawer base is simply improved, so that the body bus and the side conductor of the drawer base can be electrically isolated, and the electrical clearance or creepage distance is increased.

Description

Drawer type circuit breaker's isolation structure relatively

Technical Field

The utility model belongs to the technical field of the circuit breaker, specifically say so and relate to a withdrawable circuit breaker's isolation structure relatively, can make the body generating line reach electrical isolation to drawer base side conductor position, increase electric clearance or creepage distance.

Background

Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their range of use. The low-voltage circuit breaker is also called an automatic switch, commonly called an air switch and also called a low-voltage circuit breaker, and is an electric appliance which not only has the function of a manual switch, but also can automatically perform voltage loss, undervoltage, overload and short-circuit protection. It can be used for distributing electric energy, starting asynchronous motor infrequently, protecting power supply circuit and motor, etc., when they are seriously overloaded or short-circuited or under-voltage, etc. faults occur, it can automatically cut off circuit, its function is equivalent to the combination of fuse type switch and over-and under-heat relay, etc., and after breaking fault current, it does not need to change parts, so that it has been extensively used.

The circuit breaker requires the structure diversified according to its performance, and wherein pull-out type frame circuit breaker is that low voltage electrical industry uses more common structure, and it mainly comprises circuit breaker body and drawer seat. As shown in fig. 1, the conventional withdrawable circuit breaker is insulated only by air, and due to space limitation, when a body of the withdrawable circuit breaker is located at a connection position of a drawer base, there is no insulation and separation measure between a bus of the body and a side conductor of the drawer base, and when a large voltage impact occurs or when a short-circuit current is broken, the bus exposed outside a bottom plate of an insulation base of the circuit breaker body and the side conductor of the drawer base are easily broken down, which causes a ground short circuit of the circuit breaker.

In order to solve the technical problem that the drawer type circuit breaker is easy to be broken down through air insulation and causes a ground short circuit of the circuit breaker, the chinese patent ZL201010232464.7 discloses a high-insulation circuit breaker, which comprises a body part and a drawer part, wherein: the body part comprises a breaker body and a body slotting tool; the drawer part comprises drawer side plates, an arc isolating device, a bridge contact, a drawer base and a bottom plate, wherein the drawer side plates are positioned at two sides of the circuit breaker body, and the bottom plate is positioned at the lower part of the circuit breaker body; the arc isolating device is arranged between the bridge contact and the body slotting tool and plays an insulating role when the circuit breaker is at a separation position; the body slotting tool and the bridge type contact are respectively arranged in the corresponding circuit breaker body and the drawer base which are insulated from each other; when the circuit breaker is at the connection position, the body slotting tool is connected with the bridge type contact; the method is characterized in that: at least one insulating part is arranged between the part of the conductive part of the circuit breaker body exposed out of the insulating part and the inner side of the drawer; each insulating piece is arranged on the circuit breaker body; at least one of the insulating members is a pair of insulating plates which are installed on both sides of the circuit breaker body, the front end of each insulating plate protrudes out of the circuit breaker body, and when the body plug blade is connected with the bridge-type contact, the front end of each insulating plate is positioned between the drawer side plate and the drawer base; each insulating part and the circuit breaker body are respectively provided with a group of bosses and a group of grooves which are matched with each other, and each boss is positioned in each corresponding groove to jointly form a labyrinth structure. But the technical scheme has complex structure and high requirement on the size matching of the boss and the groove. The structure is closed, heat dispersion can be reduced, and the temperature rise of the product is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at exactly that it is complicated to the insulating isolation structure of above-mentioned current withdrawable circuit-breaker, lead to the too high defect of product temperature rise easily, provide a withdrawable circuit-breaker's isolation structure relatively, through do simple improvement to current drawer seat, just can make and reach electrical isolation between body generating line and the drawer seat side conductor, increased electric clearance or creepage distance.

Technical scheme

In order to realize above-mentioned technical purpose, the utility model provides a pair of withdrawable circuit-breaker's isolation structure relatively, it includes drawer seat and circuit breaker body, be equipped with the guide rail group on the curb plate of drawer seat, the slide clamps on the guide rail group, be provided with the conductive part of salient insulating bottom plate on the insulating bottom plate of circuit breaker body, its characterized in that: the side plate, one or more of the guide rail group or the sliding plate are provided with an insulating part, when the circuit breaker body and the drawer seat are in a connecting position, the insulating part is positioned between the conductive part of the circuit breaker body and the guide rail group or/and the sliding plate or/and the side plate, so that the conductive part is electrically isolated from the guide rail group or/and the sliding plate or/and the side plate.

Further, the guide rail group comprises a first guide rail and a second guide rail, and the first guide rail and the second guide rail are arranged on the inner sides of the side plates in an up-and-down side-by-side mode.

Furthermore, the side plates, the guide rail group and the sliding plate are all electric conductors.

Advantageous effects

The utility model provides a pair of withdrawable circuit-breaker's isolation structure relatively, simple structure requires lowly to size precision. When the breaker body is shaken to the connecting position, the insulator is separated between the body conductor and the guide rail or the sliding plate or the side plate, and is of a staggered structure, so that the influence on heat dissipation performance is small. The existing drawer seat is simply improved, so that the body bus and the side conductor of the drawer seat can be electrically isolated, and the electrical clearance or creepage distance can be increased.

Drawings

Fig. 1 is a schematic view of a relative ground isolation structure of a conventional withdrawable circuit breaker.

Fig. 2 is a schematic structural view of a drawer seat according to a first embodiment of the present invention.

Fig. 3 is a schematic view of the mounting structure of the drawer seat and the circuit breaker body in the first embodiment of the present invention.

Fig. 4 is a schematic structural view of a drawer base according to a first embodiment of the present invention.

Fig. 5 is a schematic view of the mounting structure of the drawer seat and the circuit breaker body according to the first embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of 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," "second," and "third" 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" and "connected" are to be interpreted 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.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Example 1

As shown in fig. 2 and 3, the structure for relatively isolating the drawer type circuit breaker comprises a drawer base 1 and a circuit breaker body 2, wherein a side plate 101 of the drawer base 1 is provided with a guide rail group 102, and a sliding plate 103 is clamped on the guide rail group 102, in this embodiment, the guide rail group 102 comprises a first guide rail 102a and a second guide rail 102b, and the first guide rail 102a and the second guide rail 102b are arranged inside the side plate 101 in a side-by-side manner. The side plates 101, the guide rail set 102 and the sliding plate 103 are all conductive bodies. As shown in fig. 2, a conductive portion 202 protruding out of the insulating bottom plate 201 is disposed on the insulating bottom plate 201 of the circuit breaker body 2, a first insulating member 104' is mounted on the side plate 101, and a second insulating member 104' is mounted on the sliding plate 103. When the circuit breaker body 2 is swung into the drawer base 1 and is located at the connection position, as shown in fig. 3, when the circuit breaker body 2 is swung into the drawer base 1 and the circuit breaker body 2 and the drawer base 1 are located at the connection position, the first insulating member 104' is located between the conductive portion 202 of the circuit breaker body 2 and the first guide rail 102a and the side plate 101, and the second insulating member 104 "is located between the conductive portion 202 of the circuit breaker body 2 and the second guide rail 102b, the sliding plate 103 and the side plate 101, so that the conductive portion 202 and the second guide rail group 102, and the sliding plate 103 and the side plate 101 are electrically isolated. It should be noted that the insulating member 104 composed of the first insulating member 104' and the second insulating member 104 ″ can also be adjusted by a proper position to achieve electrical isolation between the conductive portion 202 and the rail set 102 or the sliding plate 103 or the side plate 101.

Example 2

As shown in fig. 4, an insulator three 104'″ is mounted on the side plate 101 and the guide rail group 102 of the drawer base 1, and as shown in fig. 5, when the circuit breaker body 2 is swung to the connection position, the insulator three 104' ″ is located between the conductive portion 202 of the upper section of the circuit breaker body 2 and the first guide rail 102a and the side plate 101, and is also located between the conductive portion 202 of the lower section of the circuit breaker body 2 and the second guide rail 102b, the sliding plate 103 and the side plate 101. Thereby achieving electrical isolation of the conductive portion 202 from the rail group 102 and the slide plate 103 and side plate 101.

Claims

1. The utility model provides a withdrawable circuit-breaker's isolation structure relatively, it includes drawer seat (1) and circuit breaker body (2), be equipped with guide rail group (102) on curb plate (101) of drawer seat (1), slide (103) clamp is in on guide rail group (102), be provided with on insulating bottom plate (201) of circuit breaker body (2) conductive part (202) of protrusion insulating bottom plate (201), its characterized in that: one or more of the side plate (101), the guide rail group (102) or the sliding plate (103) is/are provided with an insulating piece (104), when the circuit breaker body (2) is in a connection position with the drawer base (1), the insulating piece (104) is positioned between a conductive part (202) of the circuit breaker body (2) and the guide rail group (102) or/and the sliding plate (103) or/and the side plate (101), so that the conductive part (202) is electrically isolated from the guide rail group (102) or/and the sliding plate (103) or/and the side plate (101).

2. The relative earth isolation structure of a withdrawable circuit-breaker according to claim 1, wherein: the guide rail group (102) comprises a first guide rail (102 a) and a second guide rail (102 b), and the first guide rail (102 a) and the second guide rail (102 b) are arranged on the inner side of the side plate (101) in a vertical side-by-side mode.

3. The relative earth isolation structure of a withdrawable circuit-breaker according to claim 1, wherein: the side plates (101), the guide rail group (102) and the sliding plate (103) are all conductive bodies.