WO2019029481A1

WO2019029481A1 - Electric leakage circuit breaker

Info

Publication number: WO2019029481A1
Application number: PCT/CN2018/098963
Authority: WO
Inventors: 邱蔚冰; 王宏亮; 李婵娟
Original assignee: 施耐德电气工业公司; 邱蔚冰
Priority date: 2017-08-09
Filing date: 2018-08-06
Publication date: 2019-02-14
Also published as: GB2579953A8; RU2020109378A; CN109390187B; GB2579953B; CN109390187A; RU2020109378A3; GB202003182D0; NO20200271A1; GB2579953A

Abstract

An electric leakage circuit breaker comprises an line entry terminal, a circuit breaker assembly, an electric leakage protection assembly and a line exit terminal that are sequentially disposed in a first direction. The electric leakage protection assembly comprises: a zero-sequence transformer, configured to detect an electric leakage current in a sensing circuit to output a sensing signal; a control circuit, disposed on an electronic circuit board, and configured to receive the sensing signal and determine whether the electric leakage current exceeds a threshold according to the sensing signal; and an action execution mechanism, configured to execute an action when the electric leakage current exceeds the threshold, so that the circuit breaker assembly cuts off the circuit. The zero-sequence transformer and the action execution mechanism are disposed on a first side in a second direction of the electronic circuit board, and the second direction is orthogonal to the first direction.

Description

Leakage circuit breakers

Technical field

The present disclosure relates generally to earth leakage circuit breakers, and more particularly to integrated earth leakage circuit breakers.

Background technique

The earth leakage circuit breaker quickly performs an action to open the circuit when the leakage current in the circuit exceeds a predetermined value. Generally, the earth leakage circuit breaker is assembled, which includes a circuit breaker module and a leakage product module that are assembled side by side. Such an earth leakage circuit breaker occupies more space and requires manual wiring, which is time consuming and labor intensive.

Summary of the invention

Embodiments of the present disclosure provide an earth leakage circuit breaker that integrates a leakage product module and a circuit breaker module while ensuring performance of an earth leakage circuit breaker to implement an integrated earth leakage circuit breaker, thereby not only eliminating wiring but also eliminating wiring Allow to reduce the size of the distribution box.

According to an embodiment of the present disclosure, an earth leakage circuit breaker is provided, including: an incoming terminal disposed in a first direction, a circuit breaker assembly, a leakage protection component, and an outlet terminal, wherein the leakage protection component includes: a zero sequence transformer Configuring to sense a leakage current in the loop to output a sensing signal; the control circuit, disposed on the electronic circuit board, configured to receive the sensing signal and determine whether the leakage current exceeds based on the sensing signal a threshold; and an action actuator configured to perform an action when the leakage current exceeds the threshold to cause the circuit breaker assembly to open a loop, wherein the zero sequence transformer and the motion actuator are disposed at a first side of the electronic circuit board in the second direction, the second direction being orthogonal to the first direction.

According to an embodiment of the present disclosure, the leakage product module is disposed at the outlet end such that the main circuit does not turn in the direction, directly enters the leakage induction coil and is connected to the terminal. In addition, through the optimized layout of the zero-sequence transformer, electronic circuit board and action actuator of the leakage protection module, the leakage protection function is realized with the minimum space, and the maximum space of the miniature circuit breaker is ensured.

In an exemplary embodiment, the leakage protection component further includes at least two wires for at least two poles, the at least two wires passing through the zero sequence transformer, and the at least two wires One end is coupled to a respective terminal of the incoming terminal, and the second ends of the at least two wires are respectively coupled to respective terminals of the outgoing terminal. In this way, at least two poles are integrated together.

In an exemplary embodiment, the leakage protection component further includes an extended contact portion for at least two poles, the extended contact portion extending in the second direction, the extended contact portion being adjacent to the electronic circuit board The ends of the first side are respectively engaged with the second ends of the at least two wires, and the extended contacts are also coupled to respective terminals of the outlet terminals, respectively. In this way, the shortest loop is guaranteed, minimizing power consumption and temperature rise.

In an exemplary embodiment, the earth leakage circuit breaker further includes: a magnetic protection component disposed between the incoming terminal and the leakage protection component along the first direction, and configured to perform Short circuit protection.

In an exemplary embodiment, terminals of the first side of the magnetic protection component are respectively coupled to the incoming terminal, and terminals of the second side of the magnetic protection component are respectively coupled to the first of the at least two wires One end.

In an exemplary embodiment, the motion actuator includes a first housing portion, the magnetic protection assembly includes a first magnetic assembly for one pole, the first magnetic assembly includes a second housing portion, and The first housing portion and the second housing portion are joined to each other.

In an exemplary embodiment, the first housing portion and the second housing portion are coaxially joined as a combined housing.

According to an embodiment of the present disclosure, the leakage protection component and the magnetic protection component are combined into one combined component, which minimizes space, satisfies the trend of product miniaturization, facilitates product assembly, and improves assembly efficiency.

In an exemplary embodiment, the earth leakage circuit breaker further includes: at least two operating handles configured to respectively control at least two poles. In this way, the performance of the miniature circuit breaker is guaranteed.

In an exemplary embodiment, the earth leakage circuit breaker further includes: a leakage test button disposed between the incoming terminal and the operating handle, and disposed between the two poles, the leakage test A button is configured to detect whether the earth leakage circuit breaker opens the circuit when the leakage current exceeds the threshold. In this way, the leakage test button is easy to connect with the two poles and conforms to the operating habits.

In an exemplary embodiment, wherein the zero sequence transformer and the motion actuator are disposed side by side on the first side of the electronic circuit board. In this way, the leakage protection function is implemented with a minimum of space.

In an earth leakage circuit breaker according to an embodiment of the present disclosure, power consumption and temperature of a leakage product module are reduced by integrating two-pole functional components together, reducing footprint and improving assembly efficiency, and by optimizing layout design regarding a leakage product module The rise is minimized and the space of the miniature circuit breaker is ensured to meet miniaturization and ensure product performance.

DRAWINGS

1 shows a schematic cross-sectional view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure;

2 shows a schematic cross-sectional view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure;

FIG. 3 illustrates a schematic structural view of a leakage protection component according to an embodiment of the present disclosure; FIG.

FIG. 4 illustrates a schematic structural view of a leakage protection component according to an embodiment of the present disclosure; FIG.

FIG. 5 illustrates a schematic structural view of a leakage protection component and a magnetic protection component according to an embodiment of the present disclosure; FIG.

6 shows a schematic cross-sectional view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure;

FIG. 7 illustrates an exploded schematic view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure; FIG.

FIG. 8 illustrates a front view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure;

FIG. 9 shows a partially exploded schematic view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure.

Detailed ways

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure may be embodied in various forms and not limited by the embodiments set forth herein. Rather, the embodiments are provided so that this disclosure will be thorough and complete, and the scope of the disclosure will be fully conveyed by those skilled in the art. In the figures, the same reference numerals are used to refer to the same parts.

The integrated leakage circuit breaker according to the concept of the present disclosure combines the leakage product module and the circuit breaker module of the assembled leakage circuit breaker into one without affecting the performance of the earth leakage circuit breaker. According to the concept of the present disclosure, the leakage product module is disposed at the outlet end without affecting user usage and maintaining performance, and the leakage protection component and the magnetic protection component for the two poles are combined into one component. In addition, the leakage protection function is realized with a minimum space by optimizing the layout of the zero-sequence transformer of the leakage protection module, the electronic circuit board, the action actuator and the extended contact.

An integrated leakage circuit breaker according to the above concept of the present disclosure will hereinafter be described in detail with reference to the accompanying drawings.

FIG. 1 illustrates a cross-sectional view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure. Referring to FIG. 1, the earth leakage breaker 100 includes an incoming terminal 102, a circuit breaker assembly 104, a leakage protection component 106, and an outlet terminal 108 that are sequentially disposed along the Z direction.

The incoming terminal 102 and the outgoing terminal 108 are respectively disposed at both ends of the leakage breaker 100 in the Z direction for respectively connecting lines of the respective poles (for example, P poles and N poles) and outputting the pole lines. The incoming terminal 102 and the outgoing terminal 108 may be terminals for at least two poles. In the exemplary embodiment, the incoming terminal 102 and the outgoing terminal 108 are two terminals. For example, the two poles are P poles and N poles, or P1 poles and P2 poles.

The circuit breaker assembly 104 is electrically coupled between the incoming terminal 102 and the outgoing terminal 108 and is disposed proximate to the incoming terminal 102 in the Z direction. The circuit breaker assembly 104 is configured to turn the circuit on or off. In an exemplary embodiment, the circuit breaker assembly 104 is a circuit breaker known in the art, and a description thereof will be omitted herein.

The leakage protection component 106 is electrically coupled between the incoming terminal 102 and the outgoing terminal 108 and is disposed proximate to the outgoing terminal 108 in the Z direction. That is, in the earth leakage breaker 100 of the embodiment of the present disclosure, the leakage protection component 106 is disposed on the outlet terminal 108 side, while ensuring that the design of the breaker assembly 104 remains unchanged, so that the main loop does not have to be rotated, directly The leakage protection component 106 is connected to the outlet terminal 108.

In addition, the earth leakage circuit breaker 100 may further include a thermal protection component electrically coupled between the incoming terminal 102 and the outgoing terminal 108, disposed in the Z direction proximate to the incoming terminal 102, and configured to perform overload protection, such as In the case of a current overload, the circuit breaker assembly is disconnected from the circuit. The thermal protection component is a thermal protector well known in the art, and a description thereof will be omitted herein.

In addition, the earth leakage circuit breaker 100 may further include a magnetic protection component electrically coupled between the incoming terminal 102 and the outgoing terminal 108, disposed in the Z direction proximate to the incoming terminal 102, and configured to perform short circuit protection, such as The circuit breaker assembly is disconnected from the circuit in the event of a short circuit. The magnetic protection component is substantially the same as the magnetic protector known in the art, and differences of the magnetic protection component according to an embodiment of the present disclosure will be described later with reference to FIGS. 4 to 6.

An earth leakage protection assembly according to an embodiment of the present disclosure will be described below with reference to FIGS. 2 and 3. 2 shows a schematic cross-sectional view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure. FIG. 3 shows a schematic structural view of a leakage protection assembly in accordance with an embodiment of the present disclosure. 2 and 3, the leakage protection component 106 in the earth leakage circuit breaker 100 includes a zero sequence transformer 202, a control circuit, an electronic circuit board 204, and an action actuator 206.

The zero sequence transformer 202 is configured to sense a leakage current in the loop and output a sensing signal corresponding to the sensed leakage current. In an exemplary embodiment, the wires for the two poles pass through the zero sequence transformer 202. In this case, the zero sequence transformer 202 senses the imbalance of the current flowing in the wires for the two poles and outputs a corresponding sensing signal.

The control circuit is disposed on the electronic circuit board 204. The control circuit is configured to receive the sensed signal from the zero sequence transformer 202 and determine a leakage current fault based on the sensed signal. In an example embodiment, the control circuit determines whether the leakage current exceeds a predetermined threshold based on the sensed signal. When the sensed leakage current exceeds a predetermined threshold, the control circuit determines a leakage current fault in the loop and outputs a corresponding control signal.

Motion actuator 206 is mechanically coupled to circuit breaker assembly 104. The action actuator 206 is configured to perform an action when the leakage current in the loop exceeds a predetermined threshold such that the circuit breaker assembly 104 opens the circuit. The motion actuator 206 receives the control signal from the electronic circuit board 204 and performs an action based on the control signal, for example, moving the leakage motor core to operate the jack, thereby opening the circuit through the circuit breaker assembly 104 to ensure power safety.

Referring to FIGS. 2 and 3, the zero sequence transformer 202 is disposed on one side (for example, the first side) of the electronic circuit board 204 in the Y direction (for example, the positive Y direction), and the motion actuator 206 is also disposed on the electronic circuit board. One side of the 204 direction (eg, the positive Y direction) (eg, the first side). In the exemplary embodiment, the zero sequence transformer 202 and the motion actuator 206 are disposed side by side on the first side of the electronic circuit board 204. The combination of the zero sequence transformer 202 and the motion actuator 206 and the electronic circuit board 204 are arranged along the Y direction. The combination of the zero sequence transformer 202, the motion actuator 206 and the electronic circuit board 204, and the incoming terminal 102, the circuit breaker assembly 104, and the outgoing terminal 108 are arranged in the Z direction. It should be understood that the X, Y, and Z directions shown in the figures are three mutually orthogonal directions in a Cartesian coordinate system.

In the exemplary embodiment, zero sequence transformer 202, motion actuator 206, and electronic circuit board 204 are disposed substantially along the Y direction to minimize the thickness of leakage protection component 106 in the Z direction. It should be understood that the terminal portions of the zero sequence transformer 202 and the motion actuator 206 for coupling or engaging with the electronic circuit board 204 may overlap the electronic circuit board 204 in the Z direction. Further, the zero sequence transformer 202 and the motion actuator 206 do not overlap each other, and the width of the zero sequence transformer 202 and the motion actuator 206 in the X direction is close to or equal to the width of the electronic circuit board 204 in the X direction.

Through the above design of the zero sequence transformer 202, the action actuator 206 and the electronic circuit board 204, the space arrangement of each component is optimized, and the occupied space is saved, thereby realizing the leakage protection function with the minimum space without affecting the micro disconnection. The space of the device ensures the good performance of the leakage circuit breaker.

Referring to FIG. 2, the earth leakage circuit breaker 100 further includes a test circuit 208. Test circuit 208 is coupled to the leakage test button of earth leakage circuit breaker 100 for use as a leakage test circuit for earth leakage circuit breaker 100. The test loop 208 is disposed at a substantially intermediate position of the two poles, which will be described later with reference to FIG.

The connection relationship of the earth leakage protection component to other components in the earth leakage circuit breaker according to an embodiment of the present disclosure will be described below with reference to FIG.

FIG. 4 shows a schematic structural view of a leakage protection assembly in accordance with an embodiment of the present disclosure.

Referring to FIG. 4, the leakage protection assembly 106 further includes two

wires

402 and 404 for the two poles, and the two

wires

402 and 404 pass through the zero sequence transformer 202. The first ends of the two

wires

402 and 404 are respectively coupled to the two terminals of the incoming terminal 102, and the second ends of the two

wires

402 and 404 are coupled to the two terminals of the outgoing terminal 108, respectively. The two

wires

402 and 404 can be electrically conductive hard wires or cords that are electrically insulated from each other. It should be understood that the electronic circuit board 204 of the leakage protection assembly 106 is not shown in FIG. 4 for ease of illustration.

In addition, the leakage protection assembly 106 also includes

extended contacts

406 and 408 for the two poles. Referring to Figures 2 and 4, the

extended contacts

406 and 408 extend in the Y direction, and the ends in the positive Y direction of the

extended contacts

406 and 408 engage the second ends of the two

wires

402 and 404, respectively.

Extension contacts

406 and 408 are coupled to the two terminals of the outlet terminal, respectively. In this manner, the

wires

402 and 404 that exit from the zero sequence transformer 202 are directly engaged with the outlet terminals in the shortest loop manner, thereby minimizing power consumption and temperature rise. For example, the two

wires

402 and 404 are joined to the

extended contacts

406 and 408 by soldering.

As noted above, the earth leakage circuit breaker can also include a magnetic protection assembly. Referring to FIGS. 1 and 4, the magnetic protection component 410 is electrically coupled between the incoming terminal 102 and the outgoing terminal 108 and disposed between the incoming terminal 102 and the leakage protection component 106 in the Z direction. Magnetic protection component 410 is coupled to leakage protection component 106 in the Z direction.

In an exemplary embodiment, two terminals of the magnetic protection component 410 away from one side (eg, the first side) of the extended contacts 406 and 408 (eg, terminal 606 in FIG. 6 and FIG. 4 described later) Terminals 416) are respectively coupled to the incoming terminals. Two terminals of the magnetic protection component 410 adjacent one side (e.g., the second side) of the

extended contacts

406 and 408 are joined to the first ends of the two

wires

402 and 404, respectively. Referring to FIG. 4, the magnetic protection assembly 410 includes two

joint terminals

412 and 414, and the magnetic protection assembly 410 is engaged with the two

wires

402 and 404 of the leakage protection assembly through the

joint terminals

412 and 414, respectively. For example, the

bond terminals

412 and 414 can be joined to the

wires

402 and 404 by soldering.

Further, referring to FIG. 4, the leakage protection component may further include

extension terminals

418 and 420.

Extension terminals

418 and 420 can engage

extension contacts

406 and 408, respectively. The

extension terminals

418 and 420 may be integrally formed with the

extended contact portions

406 and 408, respectively. The

extension terminals

418 and 420 extend from the ends in the negative Y direction of the

extension contacts

406 and 408 toward the negative Z direction to facilitate coupling with the outlet terminals.

In the above description, the earth leakage protection assembly is engaged with the

joint terminals

412 and 414 of the magnetic protection component 410 through the

wires

402 and 404. Other engagements of the leakage protection component and the magnetic protection component in addition to the above-described engagement will be described below with reference to FIGS. 5 and 6.

FIG. 5 is a block diagram showing a state of a leakage protection component and a magnetic protection component according to an embodiment of the present disclosure. It should be understood that FIG. 5 shows the state of the combination of the leakage protection component and the magnetic protection component before being assembled into the earth leakage circuit breaker, and shows that the

contact portions

406 and 408 and the electronic circuit board are extended in the leakage protection component. The state between 204.

Referring to Figure 5, the magnetic protection assembly includes a first magnetic assembly 502 for one pole and a second magnetic assembly 504 for the other pole.

In an exemplary embodiment, as described above with respect to FIG. 4, the first magnetic component 502 is engaged with the wire 402 of the leakage protection assembly by the bond terminal 412. Additionally, the first magnetic component 502 is engaged with the motion actuator 206 of the earth leakage protection assembly. The first magnetic component 502 is fixed relative to the motion actuator 206, for example, relative to the leakage protection component. The first magnetic component 502 can be integral with the motion actuator 206. The first magnetic component 502 can be integrally formed with the motion actuator 206. The engagement of the first magnetic component 502 with the motion actuator 206 will be described later with reference to FIG.

Further, as described above with reference to FIG. 4, the second magnetic component 504 is engaged with the wire 404 of the leakage protection component by the bonding terminal 414.

In this way, the assembly of the leakage protection component and the magnetic protection component shown in FIG. 5 facilitates assembly into the earth leakage circuit breaker. For example, one pole for a relatively fixed first magnetic component 502 is first assembled, and then when the other pole is assembled, in an exemplary embodiment, the second magnetic component 504 can be relative to other components that have been fixed (eg, leakage protection) The assembly or first magnetoresistive member 502) is movable, so assembly difficulty is greatly reduced.

As described above, the combined components of the leakage protection component and the magnetic protection component not only integrate the components for the two poles, but also integrate the different functional components together, and are easy to assemble into the final product while reducing the space.

Referring to FIG. 5, in the leakage protection assembly, the

extended contacts

406 and 408 can be fixed relative to the electronic circuit board 204. For example, the

extended contacts

406 and 408 can be detachably engaged with the electronic circuit board 204. For example, the

extended contacts

406 and 408 can be fixedly engaged with the electronic circuit board 204. Alternatively, the

extended contacts

406 and 408 can also be movable relative to the electronic circuit board 204.

As described above, the combined assembly of the leakage protection component and the magnetic protection component includes

extended contacts

406 and 408 coupled to the outlet terminals such that the combined components of the leakage protection component and the magnetic protection component are easily assembled with the outlet terminals.

6 shows a cross-sectional schematic view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure, in which the engagement of the first magnetic component 502 with the motion actuator 206 in addition to engagement via the joint terminal 412 is schematically illustrated.

Referring to Figure 6, the motion actuator 206 includes a housing portion 602. The first magnetic component 502 includes a housing portion 604. The housing portion 602 and the housing portion 604 are joined to each other. In an exemplary embodiment, the housing portion 602 is coaxially coupled to the housing portion 604 as a combined housing. For example, the housing portion 602 and the housing portion 604 are coaxially joined in the Z direction. In an example embodiment, the housing portion 602 can be united with the housing portion 604. In an example embodiment, the housing portion 602 can be integrally formed with the housing portion 604.

As described above, according to an embodiment of the present disclosure, the leakage protection component and the magnetic protection component are integrated into a combined component. The combination assembly is a pre-assembled assembly, i.e., the assembly can be provided directly during assembly of the entire earth leakage circuit breaker. The combination assembly includes extended contacts to facilitate shortening the loop length and assembling with the outlet terminals. In addition, the design of the magnetic protection component in the combined component near the incoming terminal and the design of the coupling with the circuit breaker are the same as the typical magnetic protector, so that no additional design and assembly difficulties are required, and it is ensured. Performance of circuit breakers including magnetic protection. The loop length in the combined assembly is short, so that the temperature rises and the power consumption is small, and the combined assembly has a small footprint, which does not affect the space of the miniature circuit breaker, thereby ensuring the performance of the integrated leakage short.

Next, the connection relationship between the above-described combination components (for example, magnetic protection and earth leakage protection components) in the integrated earth leakage circuit breaker and other components will be described with reference to FIG. Fig. 7 shows an exploded schematic view of an earth leakage circuit breaker according to an embodiment of the present disclosure. In addition to the magnetic protection and leakage protection components, the integrated leakage circuit breaker also includes a left side box, a left side cover, a test spring, a right side box and a right side cover to realize the main functions of the earth leakage circuit breaker. In addition, the integrated leakage circuit breaker also includes accessories such as the outlet terminal block, the front cover and the test button, and the locking clip.

In the process of assembling the integrated leakage circuit breaker, the magnetic protection and leakage protection components are first provided. The relatively fixed portion of the magnetic protection and leakage protection assembly (eg, the first magnetic assembly) is then assembled with the left and left side covers. The relatively movable portion of the magnetic protection and leakage protection assembly (eg, the second magnetic assembly) is then assembled with the right and right side covers. After the outlet terminal block is engaged with the extended contact portions of the magnetic protection and leakage protection components, the assembly of the integrated leakage circuit breaker is substantially completed. It should be understood that the left side box, the left side cover, the right side case, and the right side cover are provided with functions other than the magnetic protection and leakage protection components described herein for implementing the function of the earth leakage circuit breaker. Well-known components, the description of these known components will be omitted herein.

FIG. 8 illustrates a front view of an integrated earth leakage circuit breaker in accordance with an embodiment of the present disclosure. Referring to Figure 8, the earth leakage circuit breaker 100 further includes two operating handles 802 that control the two poles, respectively. In addition, the earth leakage breaker 100 further includes a leakage test button 804 that is disposed between the incoming terminal 102 and the operating handle 802. The leakage test button 804 is used to detect whether the earth leakage circuit breaker opens the circuit when the leakage current exceeds a predetermined threshold. In this manner, the integrated earth leakage circuit breaker according to an embodiment of the present disclosure maintains a typical position of the leakage test button to facilitate operational habituation and convenience. Further, the leakage test button 804 is disposed in the middle of the two poles. For example, the leakage test button 804 is disposed at a center point of the earth leakage breaker 100 in the X direction to facilitate connection with the two poles.

FIG. 9 shows a partially exploded schematic view of an earth leakage circuit breaker in accordance with an embodiment of the present disclosure. Figure 9 shows the set position of the test circuit 208 of Figure 2 in an earth leakage circuit breaker. Referring to FIGS. 7 and 9, a leakage test button 804 is disposed on the left side cover 902, and a test spring is disposed in the left side cover 902. In addition, the test circuit is placed in the right side box 904 to be located approximately midway between the two poles for easy connection to the two poles.

In an earth leakage circuit breaker according to an embodiment of the present disclosure, a layout design of a zero sequence transformer, an electronic circuit board, an action actuator, and an extended contact portion of the earth leakage protection assembly is provided, which not only occupies the earth leakage protection component in the earth leakage circuit breaker The smaller space and shorter loop length also allow the leakage protection component to be integrated with the magnetic protection component as a combined component. The combined assembly integrates components for two poles and different functional components, reducing footprint, ensuring the performance of miniature circuit breakers, and facilitating the assembly of the entire integrated earth leakage circuit breaker.

It should be understood that although the above described integrated earth leakage circuit breaker for two poles, the concept of the present disclosure may also be applied to an earth leakage circuit breaker for two or more poles, that is, the earth leakage protection component includes two or more wires. It passes through the zero sequence transformer and is coupled to the respective terminals of the incoming terminal and the respective terminals of the outgoing terminal, respectively.

While the embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art Specific embodiment. The disclosure is intended to cover any adaptations or variations of the specific embodiments described herein.

Claims

An earth leakage circuit breaker comprising:

Incoming terminal, circuit breaker component, leakage protection component and outlet terminal arranged in sequence in the first direction,

The leakage protection component includes:

a zero sequence transformer configured to sense a leakage current in the loop to output a sensing signal;

a control circuit, disposed on the electronic circuit board, configured to receive the sensing signal and determine whether the leakage current exceeds a threshold based on the sensing signal;

An action actuator configured to perform an action when the leakage current exceeds the threshold to cause the circuit breaker assembly to open a circuit,

Wherein the zero sequence transformer and the motion actuator are disposed on a first side of the electronic circuit board in a second direction, the second direction being orthogonal to the first direction.
The earth leakage circuit breaker according to claim 1, wherein

The leakage protection component further includes at least two wires respectively for at least two poles, the at least two wires passing through the zero sequence transformer, and

First ends of the at least two wires are respectively coupled to respective terminals of the incoming terminal, and second ends of the at least two wires are respectively coupled to respective terminals of the outgoing terminal.
The earth leakage circuit breaker according to claim 2, wherein

The leakage protection assembly further includes an extended contact portion for at least two poles, the extended contact portion extending in the second direction, the first side of the extended contact portion being adjacent to the electronic circuit board The ends are respectively joined to the second ends of the at least two wires, and

The extension contacts are also coupled to respective terminals of the outlet terminals, respectively.
The earth leakage circuit breaker according to claim 2, further comprising:

A magnetic protection component disposed between the incoming terminal and the leakage protection component in the first direction and configured to perform short circuit protection.
The earth leakage circuit breaker according to claim 4, wherein terminals of the first side of the magnetic protection component are respectively coupled to the incoming terminal, and terminals of the second side of the magnetic protection component are respectively coupled to the at least two The first end of the root wire.
The earth leakage circuit breaker according to claim 5, wherein

The action actuator includes a first housing portion,

The magnetic protection assembly includes a first magnetic assembly for one pole, the first magnetic assembly includes a second housing portion, and

The first housing portion and the second housing portion are joined to each other.
The earth leakage circuit breaker of claim 6, wherein the first housing portion and the second housing portion are coaxially joined as a combined housing.
The earth leakage circuit breaker according to any one of claims 1 to 7, further comprising: at least two operating handles configured to respectively control at least two poles.
The earth leakage circuit breaker according to claim 8, further comprising: a leakage test button disposed between the incoming terminal and the operating handle, and disposed between the two poles, the leakage test A button is configured to detect whether the earth leakage circuit breaker opens the circuit when the leakage current exceeds the threshold.
The earth leakage circuit breaker according to any one of claims 1 to 7, wherein the zero sequence transformer and the motion actuator are disposed side by side on the first side of the electronic circuit board.