NO20200271A1 - Electric leakage circuit breaker - Google Patents

Electric leakage circuit breaker

Info

Publication number
NO20200271A1
NO20200271A1 NO20200271A NO20200271A NO20200271A1 NO 20200271 A1 NO20200271 A1 NO 20200271A1 NO 20200271 A NO20200271 A NO 20200271A NO 20200271 A NO20200271 A NO 20200271A NO 20200271 A1 NO20200271 A1 NO 20200271A1
Authority
NO
Norway
Prior art keywords
leakage
circuit breaker
assembly
protection assembly
magnetic
Prior art date
Application number
NO20200271A
Inventor
Weibing Qiu
Hongliang Wang
Chanjuan Li
Original Assignee
Schneider Electric Ind Sas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Schneider Electric Ind Sas filed Critical Schneider Electric Ind Sas
Publication of NO20200271A1 publication Critical patent/NO20200271A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/128—Manual release or trip mechanisms, e.g. for test purposes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

LEAKAGE CIRCUIT BREAKER
FIELD
[0001] Embodiments of the present disclosure generally relate to a leakage circuit breaker, and more specifically, to an integrated leakage circuit breaker.
BACKGROUND
[0002] A leakage circuit breaker rapidly executes an action to disconnect a circuit when a leakage current in the circuit exceeds a predetermined value. Generally, the leakage circuit breaker is of an assembled type, and comprises a circuit breaker module and a leakage detector module assembled together side by side. However, such leakage circuit breaker occupies a large space and requires a manual wiring process, which is time consuming and labor intensive.
SUMMARY
[0003] Embodiments of the present disclosure provide a leakage circuit breaker which integrates therein a leakage protection module and a circuit breaker module while ensuring the performance of the leakage circuit breaker, to implement an integrated leakage circuit breaker, thereby saving a manual wiring process and reducing a size of a distribution box.
[0004] According to embodiments of the present disclosure, there is provided a leakage circuit breaker, comprising: an inlet terminal, a circuit breaker assembly, a leakage protection assembly and an outlet terminal disposed sequentially along a first direction, wherein the leakage protection assembly comprises: a zero sequence transformer configured to sense a leakage current in a loop to output a sense signal; a control circuit disposed on an electronic circuit board, and configured to receive the sense signal and determine, based on the sense signal, whether the leakage current exceeds a threshold; and an action actuator configured to execute an action if the leakage current exceeds the threshold, to cause the circuit breaker assembly to disconnect the loop, wherein the zero sequence transformer and the action actuator are disposed at a first side of the electronic circuit board in a second direction orthogonal to the first direction.
[0005] According to the embodiments of the present disclosure, the leakage protection assembly is disposed at the outlet end such that the main loop directly enters into a leakage induction coil and is connected to the terminal, without changing its direction. In addition, the layout of the zero sequence transformer, the electronic circuit board, and the action actuator of the leakage protection assembly is optimized, the leakage protection function is implemented with a minimum space, and a maximum space of a micro circuit breaker is ensured.
[0006] In an exemplary embodiment, the leakage protection assembly further comprises at least two wires for at least two poles, the at least two wires passing through the zero sequence transformer. First ends of the at least two wires are coupled to corresponding terminals of the inlet terminal, respectively, and second ends of the at least two wires are coupled to corresponding terminals of the outlet terminal, respectively. In this way, the at least two poles are integrated together.
[0007] In an exemplary embodiment, the leakage protection assembly further comprises extended contacts for the at least two poles. The extended contacts extend in the second direction, ends of the extended contacts close to the first side of the electronic circuit board are connected to the second ends of the at least two wires, respectively, and the extended contacts are also coupled to the corresponding terminals of the outlet terminal, respectively. In this way, the shortest length of loop is ensured, minimizing power consumption and temperature rise.
[0008] In an exemplary embodiment, the leakage circuit breaker further comprises: a magnetic protection assembly disposed between the inlet terminal and the leakage protection assembly along the first direction, and configured to execute short circuit protection.
[0009] In an exemplary embodiment, terminals of the magnetic protection assembly at a first side are coupled to the inlet terminal, respectively, and terminals of the magnetic protection assembly at a second side are connected to the first ends of the at least two wires, respectively.
[0010] In an exemplary embodiment, the action actuator comprises a first housing portion, the magnetic protection assembly comprises a first magnetic assembly for a pole, the first magnetic assembly comprises a second housing portion, and the first housing portion and the second housing portion are connected to each other.
[0011] In an exemplary embodiment, the first housing portion and the second housing portion are coaxially connected as a combined housing.
[0012] According to the embodiments according to the present disclosure, the leakage protection assembly and the magnetic protection assembly are combined as a combined assembly to achieve product miniaturization by minimizing the space, facilitate assembling of the product, and improve the assembling efficiency.
[0013] In an exemplary embodiment, the leakage circuit breaker further comprises at least two operating handles configured to control the at least two poles. In this way, the performance of the micro circuit breaker is ensured.
[0014] In an exemplary embodiment, the leakage circuit breaker further comprises a leakage test button disposed between the inlet terminal and the operating handles and in the middle of the two poles, and the leakage test button is configured to detect whether the leakage circuit breaker disconnects the loop if the leakage current exceeds the threshold. In this way, the leakage test button is easily connected to two poles and suits operational habits.
[0015] In an exemplary embodiment, the zero sequence transformer and the action actuator are disposed side by side at the first side of the electronic circuit board. In this way, the leakage protection function can be implemented with the minimum space.
[0016] In the leakage circuit breaker according to the embodiments of the present disclosure, two functional assemblies are integrated together to reduce the occupied space and improve the assembling efficiency. The layout design for the leakage protection module is optimized to minimize power consumption and temperature rise of the leakage protection module and guarantee the space of the micro circuit breaker, thereby satisfying miniaturization and ensuring the product performance.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Fig. 1 illustrates a cross-sectional schematic diagram of a leakage circuit breaker according to an embodiment of the present disclosure;
[0018] Fig. 2 illustrates a cross-sectional schematic diagram of a leakage circuit breaker according to an embodiment of the present disclosure;
[0019] Fig. 3 illustrates a structural schematic diagram of a leakage protection assembly according to an embodiment of the present disclosure;
[0020] Fig. 4 illustrates a structural schematic diagram of a leakage protection assembly according to an embodiment of the present disclosure;
[0021] Fig. 5 illustrates a structural schematic diagram of a leakage protection assembly and a magnetic protection assembly according to an embodiment of the present disclosure;
[0022] Fig. 6 illustrates a cross-sectional schematic diagram of a leakage circuit breaker according to an embodiment of the present disclosure;
[0023] Fig. 7 illustrates an exploded view of a leakage circuit breaker according to an embodiment of the present disclosure;
[0024] Fig. 8 illustrates a front view of a leakage circuit breaker according to an embodiment of the present disclosure; and
[0025] Fig. 9 illustrates an exploded partial view of a leakage circuit breaker according to an embodiment of the present disclosure.
DETAILED DESCRIPTION OF EMBODIMENTS
[0026] Embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Although the drawings illustrate preferred embodiments of the present disclosure, it should be appreciated that the present disclosure may be implemented in various manners but should not be construed as being limited by the embodiments illustrated herein. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. Throughout the drawings, the same or similar reference numbers refer to the same or similar components.
[0027] The integrated leakage circuit breaker according to a concept of the present disclosure combines a leakage protection module and a circuit breaker module of an assembled type of leakage circuit breaker into one piece, without impacting the performance of the leakage circuit breaker. According to the concept of the present disclosure, the leakage protection module is disposed at an outlet end, and a leakage protection assembly and a magnetic protection assembly for two poles are combined into one assembly, without affecting user’s use and maintaining the performance. In addition, a layout for a zero sequence transformer, an electronic circuit board, an action actuator and extended contacts is optimized to implement the leakage protection function in a minimum space.
[0028] Hereinafter, the integrated leakage circuit breaker according to the above concept of the present disclosure will be described in detail with reference to the accompanying drawings.
[0029] Fig. 1 illustrates a cross-sectional schematic diagram of the leakage circuit breaker according to the embodiment of the present disclosure. Referring to Fig. 1, the leakage circuit breaker 100 comprises an inlet terminal 102, a circuit breaker assembly 104, a leakage protection assembly 106 and an outlet terminal 108 sequentially disposed in a Z direction.
[0030] The inlet terminal 102 and the outlet terminal 108 are disposed at two ends of the leakage circuit breaker 100 in the Z direction, to allow entrance and exit of wires of respective poles (e.g., a P pole and an N pole). The inlet terminal 102 and the outlet terminal 108 may be terminals for at least two poles. In an exemplary embodiment, the inlet terminal 102 and the outlet terminal 108 are terminals for two poles. For example, the two poles are P pole and N pole, or P1 pole and P2 pole.
[0031] The circuit breaker assembly 104 is electrically coupled between the inlet terminal 102 and the outlet terminal 108 and disposed close to the inlet terminal 102 in the Z direction. The circuit breaker assembly 104 is configured to switch on or off a loop. In an exemplary embodiment, the circuit breaker assembly 104 is a circuit breaker well known in the art, and descriptions thereof will be omitted herein.
[0032] The leakage protection component 106 is electrically coupled between the inlet terminal 102 and the outlet terminal 108 and disposed close to the outlet terminal 108. That is, in the leakage circuit breaker 100 according to the embodiment of the present disclosure, the leakage protection assembly 106 is disposed at the outlet terminal 108 side, so that the circuit breaker assembly 104 is coupled to the outlet terminal 108 directly through the leakage protection component 106 without altering a direction of the main loop, while ensuring that the design of the circuit breaker 104 remains unchanged.
[0033] In addition, the leakage circuit breaker 100 may further comprise a thermal protection assembly. The thermal protection assembly is electrically coupled between the inlet terminal 102 and the outlet terminal 108 and disposed close to the inlet terminal 102 in the Z direction, and is configured to perform overload protection, for example, to cause the circuit breaker assembly to disconnect the loop in a case of current overload. The thermal protection assembly is a thermal protector well known in the art, and descriptions thereof will be omitted herein.
[0034] Moreover, the leakage circuit breaker 100 may further comprise a magnetic protection assembly. The magnetic protection assembly is electrically coupled between the inlet terminal 102 and the outlet terminal 108 and disposed close to the inlet terminal 102 in the Z direction, and is configured to perform short circuit protection, for example, to cause the circuit breaker assembly to disconnect the loop in the case of short circuit. The magnetic protection assembly is substantially identical to a magnetic protector well known in the art, and different structures of the magnetic protection assembly according to the embodiment of the present disclosure will be described later with reference to Figs. 4-6.
[0035] The leakage protection assembly according to the embodiment of the present disclosure will be described below with reference to Figs. 2 and 3. Fig. 2 illustrates a cross-sectional schematic diagram of the leakage circuit breaker according to the embodiment of the present disclosure. Fig. 3 illustrates a structural schematic diagram of the leakage circuit breaker according to the embodiment of the present disclosure. Referring to Figs. 2 and 3, the leakage protection assembly 106 in the leakage circuit breaker 100 comprises a zero sequence transformer 202, a control circuit, an electronic circuit board 204 and an action actuator 206.
[0036] The zero sequence transformer 202 is configured to sense a leakage current in the loop and output a sense signal corresponding to the sensed leakage current. In an exemplary embodiment, wires for two poles pass through the zero sequence transformer 202. In the circumstance, the zero sequence transformer 202 senses an imbalance between currents flowing through the wires for two poles and outputs the corresponding sense signal.
[0037] The control circuit is disposed on the electronic circuit board 204. The control circuit is configured to receive the sense signal from the zero sequence transformer 202 and determine a leakage current fault based on the sense signal. In an exemplary embodiment, the control circuit determines, based on the sense signal, whether the leakage current exceeds a predetermined threshold. If the sensed leakage current exceeds the predetermined threshold, the control circuit determines the leakage current fault in the loop and outputs a corresponding control signal.
[0038] The action actuator 206 is mechanically coupled to the circuit breaker assembly 104. The action actuator 206 is configured to execute an action if the leakage current in the loop exceeds the predetermined threshold, to cause the circuit breaker assembly 104 to disconnect the loop. The action actuator 206 receives the control signal from the electronic circuit board 204 and executes, based on the control signal, the action, for example, for causing a leakage core to move to operate a knockout pin, thereby disconnecting the loop via the circuit breaker assembly 104, so as to ensure power safety.
[0039] Referring to Figs. 2 and 3, the zero sequence transformer 202 is disposed at a side (e.g., a first side) of the electronic circuit board 204 in a Y direction (e.g., the positive Y direction), and the action actuator 206 is also disposed at the side (e.g., the first side) of the electronic circuit board 204 in the Y direction (e.g., the positive Y direction). In an exemplary embodiment, the zero sequence transformer 202 and the action actuator 206 are disposed side by side at the first side of the electronic circuit board 204. A combination of the zero sequence transformer 202 and the action actuator 206, and the electronic circuit board 204 are arranged along the Y direction. A combination of the zero sequence transformer 202, the action actuator 206 and the electronic circuit board 204, and the inlet terminal 102, the circuit breaker assembly 104 and the outlet terminal 108 are arranged along the Z direction. It should be appreciated that the X, Y and Z directions as shown in the drawings are three directions orthogonal to one another in Cartesian coordinate system.
[0040] In an exemplary embodiment, the zero sequence transformer 202, the action actuator 206 and the electronic circuit board 204 are disposed substantially along the Y direction, to minimize a thickness of the leakage protection assembly 106 in the Z direction. It should be appreciated that terminal portions of the zero sequence transformer 202 and the action actuator 206 for coupling or connecting to the electronic circuit board 204 may overlap with the electronic circuit boards 204 in the Z direction. Moreover, the zero sequence transformer 202 and the action actuator 206 do not overlap with each other, and a width of the zero sequence transformer 202 and the action actuator 206 in the X direction approximates or is equal to a width of the electronic circuit board 204 in the X direction.
[0041] Through the above design of the zero sequence transformer 202, the action actuator 206 and the electronic circuit board 204, the present disclosure optimizes the spatial arrangement of the respective components and saves the occupied space, thereby implementing the leakage protection function by using the minimum space without impacting a space of a micro circuit breaker, and ensuring the good performance of the leakage circuit breaker.
[0042] Referring to Fig. 2, the leakage circuit breaker 100 further comprises a test loop 208. The test loop 208 is coupled to a leakage test button of the leakage circuit breaker 100 for serving as a leakage test loop of the leakage circuit breaker 100. The test loop 208 is disposed at a substantially intermediate position between the two poles, which will be described later with reference to Fig.9.
[0043] Connection relations of the leakage protection assembly with other components in the leakage circuit breaker according to the embodiment of the present disclosure will be described below with reference to Fig.4.
[0044] Fig. 4 illustrates a structural schematic diagram of the leakage protection assembly according to the embodiment of the present disclosure.
[0045] Referring to Fig. 4, the leakage protection assembly 106 also comprises two wires 402 and 404 for two poles which pass through the zero sequence transformer 202. First ends of the two wires 402 and 404 are coupled to two terminals of the inlet terminal 102, respectively, and second ends of the two wires 402 and 404 are coupled to two terminals of the outlet terminal 108, respectively. The two wires 402 and 404 may be electrically conductive hard or soft wires insulating from each other. It should be appreciated that, for ease of illustration, Fig. 4 does not show the electronic circuit board 204 of the leakage protection assembly 106.
[0046] The leakage protection assembly 106 further comprises extended contacts 406 and 408. Referring to Figs. 2 and 4, the extended contacts 406 and 408 extend along the Y direction, and ends of the extended contacts 406 and 408 in the positive Y direction are connected to the second ends of the two wires 402 and 404, respectively. The extended contacts 406 and 408 are coupled to two terminals of the outlet terminal 108, respectively. In this way, the wires 402 and 404 passing through the zero sequence transformer 202 are directly connected to the outlet terminal 108 in a manner of the shortest loop, thereby minimizing power consumption and temperature rise. For example, the two wires 402 and 404 are connected to the extended contacts 406 and 408 by welding.
[0047] As aforementioned, the leakage circuit breaker may further comprise a magnetic protection assembly. Referring to Figs. 1 and 4, the magnetic protection assembly 410 is electrically coupled between the inlet terminal 102 and the outlet terminal 108 and disposed between the inlet terminal 102 and the leakage protection assembly 106 in the Z direction. The magnetic protection assembly 410 is connected to the leakage protection assembly 106 in the Z direction.
[0048] In an exemplary embodiment, two terminals (e.g., a terminal 606 in Fig. 6, and a terminal 416 in Fig.4 as will be described later) of the magnetic protection assembly 410 at a side (e.g., a first side) away from the extended contacts 406 and 408 are coupled to the inlet terminal 102, respectively. Two terminals of the magnetic protection assembly 410 at a side (e.g., a second side) close to the extended contacts 406 and 408 are connected to the first ends of the two wires 402 and 404, respectively. Referring to Fig. 4, the magnetic protection assembly 410 comprises two connecting terminals 412 and 414 through which the magnetic protection assembly 410 is connected to the two wires 402 and 404 of the leakage protection assembly 106, respectively. For example, the connecting terminals 412 and 414 may be connected to the wires 402 and 404 by welding.
[0049] In addition, referring to Fig. 4, the leakage protection assembly 106 may further comprise extended terminals 418 and 420. The extended terminals 418 and 420 may be connected to the extended contacts 406 and 408, respectively. The extended terminals 418 and 420 may be formed integrally with the extended contacts 406 and 408, respectively. The extended terminals 418 and 420 extend from ends of the extended contacts 406 and 408 in the negative Y direction towards the negative Z direction, to facilitate coupling to the outlet terminal.
[0050] In the above descriptions, the leakage protection assembly 106 is connected via the wires 402 and 404 to the connecting terminals 412 and 414 of the magnetic protection assembly 410. Hereinafter, further connections other than the above connections of the leakage protection assembly to the magnetic protection assembly will be described below with reference to Figs. 5 and 6.
[0051] Fig. 5 illustrates a structural schematic diagram of one state of the leakage protection assembly and the magnetic protection assembly according to the embodiment of the present disclosure. It should be appreciated that Fig.5 illustrates the state before the combination of the leakage protection assembly and the magnetic protection assembly is assembled into the leakage circuit breaker, and the state of relation between the extended contacts 406 and 408 and the electronic circuit board 204 in the leakage protection assembly.
[0052] Referring to Fig. 5, the magnetic protection assembly comprises a first magnetic assembly 502 for one pole and a second magnetic assembly 504 for the other pole.
[0053] In an exemplary embodiment, as described above with reference to Fig. 4, the first magnetic assembly 502 is connected via the connecting terminal 412 to the wire 402 of the leakage protection assembly. In addition, the first magnetic assembly 502 is connected to the action actuator 206 of the leakage protection assembly. The first magnetic assembly 502 is fixed relative to the action actuator 206, for example, relative to the leakage protection assembly. The first magnetic assembly 502 may be connected with the action actuator 206 as one piece. The first magnetic assembly 502 may be formed integrally with the action actuator 206. Connection between the first magnetic assembly 502 and the action actuator 206 will be described below with reference to Fig.6.
[0054] In addition, as described above with reference to Fig. 4, the second magnetic assembly 504 is connected via the connecting terminal 414 to the wire 404 of the leakage protection assembly.
[0055] In this way, the assembly comprised of the leakage protection assembly and the magnetic protection assembly as shown in Fig. 5 makes itself easily assembled into the leakage circuit breaker. For example, assembling for a pole corresponding to the relatively fixed first magnetic assembly 502 is first performed, and then assembling for the other pole is performed. In an exemplary embodiment, the second magnetic assembly 504 is movable relative to other fixed components (e.g., the leakage protection assembly or the first magnetic assembly 502) to lower the assembling difficulty.
[0056] As aforementioned, the combined assembly of the leakage protection assembly and the magnetic protection assembly not only integrates the assemblies for two poles but also integrates different functional assemblies, and can be easily assembled into a final product while reducing the occupied space.
[0057] Referring to Fig. 5, in the leakage protection assembly, the extended contacts 406 and 408 may be fixed relative to the electronic circuit board 204. For example, the extended contacts 406 and 408 may be detachably connected to the electronic circuit board 204. For example, the extended contacts 406 and 408 may be fixedly connected to the electronic circuit board 204. Alternatively, the extended contacts 406 and 408 may be movable relative to the electronic circuit board 204.
[0058] In view of the above descriptions, the combined assembly of the leakage protection assembly and the magnetic assembly comprises the extended contacts 406 and 408 coupled to the outlet terminal, such that the combined assembly of the leakage protection assembly and the magnetic assembly can be easily assembled to the outlet terminal 108.
[0059] Fig. 6 illustrates a cross-sectional schematic diagram of the leakage circuit breaker according to the embodiment of the present disclosure, which shows a connection between the first magnetic assembly 502 and the action actuator 206, other than the connection via the connecting terminal 412.
[0060] Referring to Fig. 6, the action actuator 206 comprises a housing portion 602. The first magnetic assembly 502 comprises a housing portion 604. The housing portion 602 and the housing portion 604 are connected with each other. In an exemplary embodiment, the housing portion 602 and the housing portion 604 are coaxially connected as a combined housing. For example, the housing portion 602 and the housing portion 604 are coaxially connected along the Z direction. In an exemplary embodiment, the housing portion 602 and the housing portion 604 are connected as one piece. In an exemplary embodiment, the housing portion 602 and the housing portion 604 are formed integrally.
[0061] As described above, according to the embodiments of the present disclosure, the leakage protection assembly and the magnetic protection assembly are integrated as a combined assembly. The combined assembly is a pre-assembled assembly, i.e., the combined assembly may be provided directly in the process of assembling the entire leakage circuit breaker. The combined assembly comprises the extended contacts to shorten the loop length and facilitate assembling with the outlet terminal. In addition, the design for a side of the magnetic assembly of the combined assembly close to the inlet terminal and the design of the magnetic assembly for coupling to the circuit breaker are the same as those of a typical magnetic protector, thereby ensuring the performance of the circuit breaker including the magnetic protection function, without incurring extra design and assembling difficulties. The combined assembly has a short loop length, resulting in a small temperature increase and less power consumption, and it also occupies a small space to ensure the performance of the integrated leakage circuit breaker, without impacting the space of the micro circuit breaker.
[0062] Connection relations between the above-described combined assembly (e.g. the magnetic protection and leakage protection assembly) and other components in the integrated leakage circuit breaker will be described below with reference to Fig.7. Fig. 7 illustrates an exploded view of the leakage circuit breaker according to the embodiment of the present disclosure. In addition to the magnetic protection and leakage protection assembly, the integrated leakage circuit breaker comprises a left box, a left lid, a test spring, a right box and a right lid to implement the main function of the leakage circuit breaker. Moreover, the integrated leakage circuit breaker further comprises fittings such as an outlet terminal block, a front cover and a test button, a locking clip, and the like.
[0063] In a process of assembling the integrated leakage circuit breaker, the magnetic protection and leakage protection assembly is provided first; then the relatively fixed portion (e.g., the first magnetic assembly) of the magnetic protection and leakage protection assembly is assembled to the left box and the left lid; and thereafter, the relatively movable portion (e.g., the second magnetic assembly) of the magnetic protection and leakage protection assembly is assembled to the right box and the right lid. The assembling of the integrated leakage circuit breaker is basically completed after connecting the extended contacts of the magnetic protection and leakage protection assembly to the outlet terminal block. It should be appreciated that, further well-known components for implementing the function of the leakage circuit breaker other than the respective components of the magnetic protection and leakage protection assembly as described herein are provided in the left box, the left lid, the right box and the right lid, and descriptions thereof will be omitted herein.
[0064] Fig. 8 illustrates a front view of the integrated circuit breaker according to the embodiment of the present disclosure. Referring to Fig. 8, the leakage circuit breaker 100 further comprises two operating handles 802 for controlling two poles, respectively. In addition, the leakage circuit breaker 100 further comprises a leakage test button 804 disposed between the inlet terminal 102 and the operating handles 802. The leakage test button 804 is provided for detecting whether the leakage circuit breaker disconnects the loop if the leakage current exceeds the predetermined threshold. In this way, the integrated leakage circuit breaker according to the embodiment of the present disclosure maintains the typical position of the leakage test button, to facilitate operational habits and convenience. Moreover, the leakage test button 804 is disposed between two poles. For example, the leakage test button 804 is disposed at a center point of the leakage circuit breaker 100 in the X direction, to facilitate the connections to the two poles.
[0065] Fig. 9 illustrates an exploded partial view of the leakage circuit breaker according to the embodiment of the present disclosure. Fig. 9 shows a position of the test loop 208 provided in the leakage circuit breaker in Fig. 2. Referring to Figs. 7 and 9, the leakage test button 804 is disposed on the left lid 902 in which a spring is disposed. In addition, the test loop is disposed in the right box 904 substantially intermediate between the two poles, for facilitating the connections to two poles.
[0066] In the leakage circuit breaker according to the embodiments of the present disclosure, there is provided a layout design of the zero sequence transformer, the electronic circuit board, the action actuator and the extended contacts of the leakage protection assembly, which not only allows the leakage protection assembly to occupy a small space and have a short length of loop in the leakage circuit breaker, but also allows the leakage protection assembly to integrate with the magnetic protection assembly to form the combined assembly. The combined assembly integrates the assemblies for two poles and different functional assemblies, and thus reduces the occupied space, ensures the performance of the micro circuit breaker, and facilitates assembling of the entire integrated leakage circuit breaker.
[0067] It should be appreciated that, although the integrated leakage circuit breaker for two poles is described herein, the concept of the present disclosure is applicable to a leakage circuit breaker for more than two poles, i.e., the leakage protection assembly comprises more than two wires that pass through the zero sequence transformer and are coupled to corresponding terminals of the inlet terminal and corresponding terminals of the outlet terminal, respectively.
[0068] Although embodiments of the present disclosure have been illustrated and described, it should be appreciated by those skilled in the art that various alternative and/or equivalent implementations, without departing from the scope of the present disclosure, may substitute for the embodiments as illustrated and described. The present disclosure is intended to cover any change or variant to the embodiments described herein.

Claims (10)

I/We Claim:
1. A leakage circuit breaker, comprising:
an inlet terminal, a circuit breaker assembly, a leakage protection assembly and an outlet terminal disposed sequentially along a first direction,
wherein the leakage protection assembly comprises:
a zero sequence transformer configured to sense a leakage current in a loop to output a sense signal;
a control circuit disposed on an electronic circuit board, and configured to receive the sense signal and determine, based on the sense signal, whether the leakage current exceeds a threshold; and
an action actuator configured to execute an action if the leakage current exceeds the threshold, to cause the circuit breaker assembly to disconnect the loop,
wherein the zero sequence transformer and the action actuator are disposed at a first side of the electronic circuit board in a second direction orthogonal to the first direction.
2. The leakage circuit breaker of claim 1, wherein
the leakage protection assembly further comprises at least two wires 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 coupled to corresponding terminals of the inlet terminal, respectively, and second ends of the at least two wires are coupled to corresponding terminals of the outlet terminal, respectively.
3. The leakage circuit breaker of claim 2, wherein
the leakage protection assembly further comprises extended contacts for the at least two poles, the extended contacts extending in the second direction, ends of the extended contacts close to the first side of the electronic circuit board being connected to the second ends of the at least two wires, respectively, and
the extended contacts are also coupled to the corresponding terminals of the outlet terminal, respectively.
4. The leakage circuit breaker of claim 2, further comprising:
a magnetic protection assembly disposed between the inlet terminal and the leakage protection assembly along the first direction, and configured to execute short circuit protection.
5. The leakage circuit breaker of claim 4, wherein terminals of the magnetic protection assembly at a first side are coupled to the inlet terminal, respectively, and terminals of the magnetic protection assembly at a second side are connected to the first ends of the at least two wires, respectively.
6. The leakage circuit breaker of claim 5, wherein
the action actuator comprises a first housing portion,
the magnetic protection assembly comprises a first magnetic assembly for a pole, the first magnetic assembly comprises a second housing portion, and
the first housing portion and the second housing portion are connected to each other.
7. The leakage circuit breaker of claim 6, wherein the first housing portion and the second housing portion are coaxially connected as a combined housing.
8. The leakage circuit breaker of any of claims 1-7, further comprising: at least two operating handles configured to control the at least two poles, respectively.
9. The leakage circuit breaker of claim 8, further comprising: a leakage test button disposed between the inlet terminal and the operating handles and in the middle of the two poles, and configured to detect whether the leakage circuit breaker disconnects the loop if the leakage current exceeds the threshold.
10. The leakage circuit breaker of any of claims 1-7, wherein the zero sequence transformer and the action actuator are disposed side by side at the first side of the electronic circuit board.
NO20200271A 2017-08-09 2020-03-06 Electric leakage circuit breaker NO20200271A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710674062.4A CN109390187B (en) 2017-08-09 2017-08-09 Earth leakage circuit breaker
PCT/CN2018/098963 WO2019029481A1 (en) 2017-08-09 2018-08-06 Electric leakage circuit breaker

Publications (1)

Publication Number Publication Date
NO20200271A1 true NO20200271A1 (en) 2020-03-06

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ID=65273365

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20200271A NO20200271A1 (en) 2017-08-09 2020-03-06 Electric leakage circuit breaker

Country Status (4)

Country Link
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GB2579953A8 (en) 2020-07-29

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