CN108695115B

CN108695115B - Residual current operated circuit breaker

Info

Publication number: CN108695115B
Application number: CN201710221946.4A
Authority: CN
Inventors: 彭友华; 张业; 韩毅峰
Original assignee: Siemens Corp
Current assignee: Siemens Corp
Priority date: 2017-04-06
Filing date: 2017-04-06
Publication date: 2020-05-26
Anticipated expiration: 2037-04-06
Also published as: EP3385974A1; EP3385974B1; CN108695115A

Abstract

The present invention provides a residual current operated circuit breaker. The circuit breaker comprises: a casing; an electromagnetic tripping device and an arc extinguishing device; a first operating mechanism and a second operating mechanism; a leakage tripping device; A mounting notch is opened on one side of the terminal, and the first terminal assembly can pass through the mounting notch and be clamped in the space formed by the first casing and the second casing; a second terminal assembly is accommodated in the In the first accommodating chamber; a third terminal assembly, which is accommodated in the second accommodating chamber; According to the residual current operated circuit breaker of the present invention, the protection function of the product is more complete, the structure layout of the casing is more compact, and the product installation and wiring process are more convenient and reliable.

Description

Residual current operated circuit breaker

Technical Field

The invention relates to the field of low-voltage electricity, in particular to a residual current operated circuit breaker.

Background

As is well known, an earth leakage circuit breaker has an earth leakage protection function in addition to the control, overload, and short-circuit protection functions of a conventional small circuit breaker (MCB), and can play a positive role in protecting the life safety, property safety, etc. of people, rapidly cut off a fault power supply in a short time, and protect the safety of people and electric equipment.

The conventional RCBO is generally divided into two implementations according to the difference of its own structural layout. The first type of RCBO has the same width as a compact product, but because the leakage detection and N-pole connection flexible lead are located on the left side of the product, the product length is longer, so a special distribution box is still required for installation, and meanwhile, because the N-pole connection flexible lead does not have the basic protection function of the RCBO, the reliability of the product is poor. The second type of RCBO has the same size as a compact product but lacks an N-pole connection pigtail, so that the product installation cost is high and convenience of user wiring is to be improved.

In order to solve the above-mentioned drawbacks, those skilled in the art need to develop a novel residual current operated circuit breaker.

Disclosure of Invention

The invention aims to provide a residual current operated circuit breaker, which has more perfect protection function, more compact structural layout of a shell and more convenient and reliable installation and wiring processes of products.

The invention provides a residual current operated circuit breaker, comprising: a housing including a first housing, a second housing, and a mounting housing therebetween, a first receiving chamber being formed between the first housing and the mounting housing, and a second receiving chamber being formed between the second housing and the mounting housing; an electromagnetic trip device and an arc extinguishing device arranged in the first accommodating chamber; a first operating mechanism, which is used for cooperating with the electromagnetic tripping device and is positioned at one side of the first accommodating chamber; an electrical leakage trip device disposed within said second containment chamber; the second operating mechanism is used for cooperating with the electric leakage tripping device to work and is positioned at one side of the second accommodating chamber, and the actions of the first operating mechanism and the second operating mechanism can realize the disconnection and the connection of a current loop; the first terminal assembly can be used for L-pole incoming line, an installation notch is formed in one side of the installation shell, and the first terminal assembly can penetrate through the installation notch and is clamped in a space formed by the first shell and the second shell; a second terminal assembly for an L pole outlet received in said first receiving chamber; a third terminal assembly for N-pole feed line received in said second receiving chamber; a soft wire subassembly with switching contact function can be used to the N utmost point and goes out the line, and its holding is in the second holds in the chamber, through above-mentioned design, can provide more convenient and reliable mode of connection for the user, under the prerequisite that guarantees that the product possesses perfect safety protection, still has the shell structure of optimization.

According to one aspect of the invention, the second terminal assembly is located in the first housing chamber on a side thereof proximate the electromagnetic trip unit.

According to another aspect of the invention, the wire inlet end of the third terminal assembly and the wire outlet end of the flexible wire assembly are located on the same side of the shell, and by means of the design, the installation and wiring of products are facilitated, the structural design inside the shell is more compact, a user does not need to use a special distribution box for installation, and the space utilization rate of the user is improved.

According to still another aspect of the present invention, the first operating mechanism includes: the second operating mechanism comprises a second contact assembly and a second executing assembly, and the first executing assembly and the second executing assembly can be linked through a driving piece and an operating handle.

According to yet another aspect of the present invention, the flexible wire assembly comprises: a connecting plate; a first connecting wire, one end of which is connected to the fixed contact in the second contact assembly and the other end of which is connected to the connecting plate; one end of the second connecting wire is connected to the connecting plate, the other end of the second connecting wire is a free connecting end and extends to the outside of the shell, so that the inner space of the shell is further saved, and the function of opening and closing the contact of the N-pole connecting wire can be realized because one side of the first connecting wire is connected to the N-pole moving contact and the N-pole static contact.

According to another aspect of the present invention, the connection plate is of a bent structure and is provided with a first bent portion having a groove shape, and the end portion of the first connection lead is received in the first bent portion; and a second bent portion of a sheet shape, an end portion of the second connection wire being crimped on the second bent portion to facilitate enhancement of reliability of the structural connection.

According to another aspect of the invention, the wiring capacity of the first terminal assembly is larger than that of the third terminal assembly, so that the electrical safety and reliability of the L-pole wiring can be effectively enhanced.

According to another aspect of the invention, the current carrying range of the first terminal assembly is 6A-32A, and the first terminal assembly can be connected with a universal bus bar so as to meet the requirement of L-maximum current access, so that the applicability of the product is stronger.

According to another aspect of the present invention, the direction of the N-pole current loop of the residual current operated circuit breaker is sequentially the third terminal assembly, the N-pole moving contact, the N-pole stationary contact, the first connecting wire, the connecting plate, and the second connecting wire.

According to another aspect of the present invention, a thermal protection assembly is further included proximate to the arc extinguishing device and within the first receiving chamber for thermal protection of the circuit breaker.

Drawings

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Wherein:

fig. 1 is a schematic product structure diagram of a residual current operated circuit breaker according to an embodiment of the invention;

fig. 2 is a schematic diagram of an N-pole structure of the residual current operated circuit breaker shown in fig. 1;

fig. 3 is a schematic diagram of an L-pole structure of the residual current operated circuit breaker shown in fig. 1;

FIG. 4 is an exploded view of the portion of FIG. 2; and

fig. 5 is a partially exploded view of fig. 3.

Description of the reference symbols

Second contact assembly 43 of residual current operated circuit breaker 100

Second actuator assembly 44 of housing 10

First housing 11 first terminal assembly 71

Second terminal assembly 72 of second housing 12

Mounting housing 13 third terminal assembly 51

Soft wire assembly 60 of electromagnetic trip device 20

First operating mechanism 21 first connecting wire 61

First contact assembly 22 second connecting wire 62

L-pole static contact 221 connecting plate 63

First bending part 631 of the L-pole moving contact 222

Second bending portion 632 of the N-pole fixed contact 431

N-pole moving contact 432 circuit board assembly 80

Driving part 81 of first execution assembly 23

Operating handle 82 of arc extinguishing device 30

Slide block 83 of leakage tripping device 40

Second operating mechanism 42

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. In the drawings showing embodiments, the same last two digits indicate components that are identical in structure or similar in structure but have the same function.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.

In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate positional relationships between the relevant portions, and do not limit their absolute positions.

In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate their degree of importance, order, and the like.

In this context, "parallel," "perpendicular," and the like are not strictly mathematical and/or geometric limitations, but also encompass tolerances as would be understood by one skilled in the art and permitted by fabrication or use.

Referring to fig. 1, which illustrates a residual current operated circuit breaker according to an embodiment of the present invention, the residual current operated circuit breaker 100 includes a housing 10. The housing 10 includes a first housing 11, a second housing 12, and a mounting housing 13. The mounting housing 13 is located between the first housing 11 and the second housing 12. A first accommodation chamber is formed between the first housing 11 and the mounting housing 13, and a second accommodation chamber is formed between the second housing 12 and the mounting housing 13. The residual current operated circuit breaker 100 has a first current loop and a second current loop, wherein the first current loop is located in the first accommodating chamber and the second current loop is located in the second accommodating chamber.

As shown in fig. 2 and 3, the residual current operated circuit breaker 100 further includes an electromagnetic trip device 20, an arc extinguishing device 30, a first operating mechanism 21, a residual current trip device 40, and a second operating mechanism 42. Specifically, the electromagnetic trip device 20 and the arc extinguishing device 30 are disposed within the first housing chamber. The first operating mechanism 21 is configured to cooperate with the electromagnetic trip device 20 to operate and is located at one side of the first accommodating chamber, the operation of the first operating mechanism 21 can realize the disconnection and connection of the first current loop, so as to realize the overcurrent protection of the residual current operated circuit breaker 100, and the arc extinguishing device 30 is beneficial to realizing the rapid extinction of the arc. The electric leakage tripping device 40 is arranged in the second accommodating cavity, the second operating mechanism 42 is used for cooperating with the electric leakage tripping device 40 to work and is positioned at one side of the second accommodating cavity, and the action of the second operating mechanism 42 can realize the breaking and the connection of the second current loop so as to realize the electric leakage protection of the residual current operated circuit breaker 100. In order to perform the thermal protection function, the residual current operated circuit breaker 100 of the present invention further includes a thermal protection assembly 31 formed of a bimetal close to the arc extinguishing device 30 and located in the first receiving chamber, and a circuit board assembly 80 for detecting and outputting a control signal and disposed in the second receiving chamber.

Referring to fig. 4 and 5, in order to satisfy the L-pole and N-pole wiring functions, respectively, the residual current operated circuit breaker of the present invention further includes a first terminal assembly 71 for L-pole incoming line, a second terminal assembly 72 for L-pole outgoing line, and a third terminal assembly 51 for N-pole incoming line. It is noted that, compared to the terminal assembly in the prior art, the first terminal assembly 71 of the present invention is larger in size, and in order to satisfy the reliability of mounting the first terminal assembly 71 without increasing the size of the housing, it is preferable that a mounting notch is opened at one side of the mounting housing 13, and the first terminal assembly 71 can penetrate through the mounting notch and be clamped in the space formed by the first housing 11 and the second housing 12. The second terminal assembly 72 is housed in the first housing chamber, and the third terminal assembly 51 is housed in the second housing chamber. Preferably, the second terminal assembly 72 is located in the first receiving chamber on a side thereof adjacent to the electromagnetic trip unit.

In particular, the wiring capacity of the first terminal assembly 71 is greater than the wiring capacity of the third terminal assembly 72. Because the first terminal assembly 71 of the present invention replaces the small terminal assembly used in the prior art, and adopts a large terminal assembly with a larger wiring capacity, the electrical safety and reliability of the L-pole wiring can be effectively enhanced. According to a preferred embodiment of the present invention, the current carrying range of the first terminal assembly 71 is 6A-32A. The first terminal assembly 71 can be selectively connected with a universal bus bar, and the L-pole wire inlet end can be connected with a lead wire with a larger cross section so as to meet the requirement of L-pole current access, so that the applicability of the product is stronger, and the competitiveness of the product is better improved. Optionally, a sliding block 83 is further disposed on a side of the housing 10 close to the first terminal assembly 71, and the sliding block 83 can prevent a finger of a user from contacting a live part, so as to effectively protect personal safety of the user, and also facilitate flexible detachable connection of the circuit breaker to a corresponding clamping rail.

In order to facilitate easier management and use of the circuit breaker by a user, unlike the prior art, the residual current operated circuit breaker of the present invention implements N-pole outgoing line through the flexible conductor assembly 60, and the flexible conductor assembly 60 has a function of opening and closing a contact, so that electrical safety and reliability of an N-pole current circuit can be enhanced. As shown in fig. 2 and 4, the flexible lead assembly 60 is accommodated in the second accommodating chamber. According to a preferred embodiment of the present invention, the wire inlet end of the third terminal assembly 51 and the wire outlet end of the flexible wire assembly 60 are located on the same side of the housing 10, which is beneficial to the installation and wiring of the product and improves the space utilization rate of users. Because the inside structural design of casing is compacter, the whole length of circuit breaker product is unchangeable, and the user need not to use special block terminal to install, has effectively promoted the convenience of product installation. In addition, as the flexible conducting wire is adopted to replace the wiring terminal, the processing technology can be simplified, and the production cost of the product is effectively saved.

As shown in fig. 2 and 3, further, the first operating mechanism 21 includes: a first contact assembly 22 and a first actuator assembly 23. The second operating mechanism 42 includes a second contact assembly 43 and a second actuator assembly 44. More specifically, the actions of the first contact assembly 22 and the first actuator assembly 23 can open and close the L-pole current loop. The second contact assembly 43 and the second actuator assembly 44 are operated to open and close the N-pole current loop. The first actuating member 23 and the second actuating member 44 can be linked by a driving member 81 and an operating handle 82.

As shown in fig. 4, the flexible wire assembly 60 includes a connection plate 63, a first connection wire 61 and a second connection wire 62 according to a preferred embodiment of the present invention. Specifically, one end of the first connecting wire 61 is connected to the stationary contact 431 of the second contact assembly 43, and the other end of the first connecting wire 61 is connected to the connecting plate 63. One end of the second connection wire 62 is connected to the connection plate 63, and the other end of the second connection wire 62 is a free connection end and extends to the outside of the housing 10. With reference to fig. 2 and 3, the L-pole current loop of the present invention sequentially includes a first terminal assembly 71, an L-pole moving contact 222, an L-pole static contact 221, and a second terminal assembly 72, and the N-pole current loop sequentially includes a third terminal assembly 51, an N-pole moving contact 432, an N-pole static contact 431, a first connecting wire 61, a connecting plate 63, and a second connecting wire 62, and through the above design, since one side of the first connecting wire 61 is connected to the N-pole moving contact 432, and the N-pole static contact 431, the soft wire assembly 60 has a function of opening and closing a breakpoint.

In conjunction with fig. 4, it is preferable that, as an exemplary embodiment, in order to save the internal space of the housing and enhance the reliability of installation, the connecting plate 63 may adopt a bending structure and can be stably clamped in the installation groove formed by the plurality of limiting ribs on the inner surface of the housing. Preferably, the connecting plate 63 is further provided with a first bent portion 631 and a second bent portion 632. In order to enhance the stability of the electrical connection, the first bent portion 631 may be provided in a groove shape, the end of the first connection wire 61 may be received in the first bent portion 631 in a groove shape, and the second bent portion 632 may be provided in a sheet shape, and the end of the second connection wire 62 is crimped on the second bent portion 632 in a sheet shape. It is to be noted that the shape and structure of the connecting plate 63 are not exclusive, and that those skilled in the art may make various modifications and substitutions according to the actual needs, without departing from the scope of the present invention, provided that they are able to perform the same function.

The residual current operated circuit breaker can provide a more convenient and reliable wiring mode for users, has an optimized shell structure on the premise of ensuring that the product has perfect safety protection, effectively saves the installation space for the users, and simultaneously simplifies the processing technology of the product and reduces the product cost because a flexible conductor is adopted to replace a wiring terminal.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A residual current operated circuit breaker (100), characterized in that it comprises:

A housing (10) comprising a first housing (11), a second housing (12) and a mounting housing (13) therebetween, the first housing (11) and the A first accommodating chamber is formed between the installation casings (13), and a second accommodating chamber is formed between the second casing (12) and the installation casing (13);

an electromagnetic tripping device (20) and an arc extinguishing device (30), arranged in the first accommodating chamber;

a first operating mechanism (21), which is used for working with the electromagnetic tripping device (20) and is located on one side of the first accommodating chamber;

a leakage tripping device (40) arranged in the second accommodating chamber;

A second operating mechanism (42), which is used to cooperate with the leakage tripping device (40) and is located on one side of the second accommodating chamber, the first operating mechanism (21) and the second The action of the operating mechanism (42) can realize the disconnection and connection of the current loop, and the second operating mechanism (42) includes a second contact assembly (43) and a second execution assembly (44);

A first terminal assembly (71), which can be used for the L-pole incoming line, a mounting notch is provided on one side of the mounting shell (13), and the first terminal assembly (71) can penetrate through the mounting notch and clamp in the space formed by the first shell (11) and the second shell (12);

a second terminal assembly (72), which can be used for the L-pole outgoing wire, which is accommodated in the first accommodating chamber;

A third terminal assembly (51), which can be used for N-pole incoming wire, is accommodated in the second accommodating chamber;

A flexible lead assembly (60) with the function of opening and closing contacts, which can be used for the N pole outgoing wire, is accommodated in the second accommodating chamber, the incoming end of the third terminal assembly (51) and the flexible lead The outlet ends of the wire assemblies (60) are located on the same side of the housing (10);

The flexible lead assembly (60) includes:

a connecting plate (63);

a first connecting wire (61), one end of which is connected to the stationary contact (431) in the second contact assembly (43), and the other end of which is connected to the connecting plate (63);

A second connecting wire (62), one end of which is connected to the connecting plate (63), and the other end of which is a free connecting end and extends to the outside of the casing (10).

2 . The residual current operated circuit breaker according to claim 1 , wherein the second terminal assembly ( 72 ) is located in a part of the first accommodating chamber close to the electromagnetic tripping device ( 20 ). 3 . side.

3. The residual current operated circuit breaker according to claim 1, wherein the first operating mechanism (21) comprises: a first contact assembly (22) and a first actuator assembly (23), wherein the The first execution assembly (23) and the second execution assembly (44) can realize linkage through a driving member (81) and an operating handle (82).

4. The residual current operated circuit breaker according to claim 1, wherein the connecting plate (63) adopts a bent structure and is provided with

a groove-shaped first bending part (631), the end of the first connecting wire (61) is accommodated in the first bending part (631); and

A sheet-shaped second bending part (632), and the end of the second connecting wire (62) is crimped on the second bending part (632).

5. The residual current operated circuit breaker according to claim 1, wherein the wiring capacity of the first terminal assembly (71) is greater than the wiring capacity of the third terminal assembly (51).

6. The residual current operated circuit breaker according to claim 1, characterized in that, the current carrying range of the first terminal assembly (71) is 6A-32A, and the first terminal assembly (71) can be connected universally busbar.

7. The residual current operated circuit breaker according to claim 1, wherein the direction of the N-pole current loop of the residual current operated circuit breaker (100) is the third terminal assembly (51), the The N-pole moving contact (432), the N-pole stationary contact (431), the first connecting wire (61), the connecting plate (63), and the second connecting wire (62).

8. The residual current operated circuit breaker according to claim 1, characterized in that it further comprises a thermal protection assembly (31), which is close to the arc extinguishing device (30) and located in the first accommodating chamber.