Leakage protection circuit breaker

Abstract

An electric leakage protection circuit breaker, an electric leakage tripper module and a circuit breaker module are disclosed, the electric leakage tripper module comprises an electric leakage protection housing and a mounting seat arranged in the electric leakage protection housing, two groups of contact mechanisms are respectively arranged on two sides of the mounting seat, and each of the two groups of contact mechanisms comprises a movable contact member, a static contact member and a driving member. The driving pieces are used for controlling the contact and separation of the corresponding movable contact pieces and static contact pieces, the two groups of contact mechanisms are respectively a first contact mechanism and a second contact mechanism, and the first contact mechanism is linked with the circuit breaker module and is connected in series to a power supply loop for supplying power to an electronic component board of the electric leakage release module and / or an electric leakage release. When the main circuit of the circuit breaker module is opened, the power supply circuit is disconnected; the second contact mechanism is connected in series to a test loop used for generating an electric leakage test signal and is used for generating the electric leakage test signal, and electric leakage test and reverse wiring protection functions can be respectively realized through the two groups of contact mechanisms.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage apparatus, concretely relates to a leakage protection circuit breaker. BACKGROUND

[0002] With the social progress and development, the electric load is more and more diversified, and the electric load surges, and the household small leakage product application is more and more widely. However, at present, the circuit board of electronic leakage product mostly adopts full-wave rectification, does not have the protection function of preventing customer miswiring (reverse wiring). When the customer appears reverse wiring, the coil tripping circuit of the circuit board can not be closed after being triggered, leads to the product silicon controlled rectifier, coil burnout, product interphase short circuit and other faults, and there is the risk of personal and property damage. CONTENT OF UTILITY MODEL

[0003] The utility model aims at overcoming at least one defect of prior art, and provides a leakage protection circuit breaker.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A leakage protection circuit breaker, including the leakage tripping device module and at least one circuit breaker module that are arranged side by side, the leakage tripping device module includes zero sequence current transformer, electronic component board and leakage tripping device, and the circuit breaker module includes handle, operating mechanism and main circuit, and the handle drives the main circuit to be conducted and disconnected through the operating mechanism, and the leakage tripping device includes leakage tripping coil and leakage tripping core driven by the leakage tripping coil,

[0006] The leakage tripping device module includes leakage protection shell and mounting seat arranged in the leakage protection shell, and two groups of contact mechanisms are respectively arranged on the opposite sides of the mounting seat along the width direction of the leakage protection shell, the two groups of contact mechanisms all include moving contact, static contact and driving piece, the driving piece is used to control the contact and separation of the respective corresponding moving contact and static contact, and the two groups of contact mechanisms are respectively first contact mechanism and second contact mechanism,

[0007] The first contact mechanism is arranged on the side of the mounting seat close to the circuit breaker module and is linked with the circuit breaker module, the moving contact and static contact are connected in series to the power supply circuit for supplying power to the electronic component board and / or leakage tripping device, and the driving piece closes the group of contact mechanisms to make the power supply circuit be conducted when the main circuit of the circuit breaker module is closed, and opens the group of contact mechanisms to make the power supply circuit be disconnected when the main circuit of the circuit breaker module is opened.

[0008] The moving contact and static contact of the second contact mechanism are connected in series to the test circuit for generating leakage test signal, and the driving piece can close the group of contact mechanisms to make the test circuit generate leakage test signal.

[0009] Preferably, the first contact mechanism comprises a first moving contact as the moving contact, a first stationary contact as the stationary contact and a first driving member as the driving member, the first moving contact and the first stationary contact are connected in series to a power supply circuit for powering the electronic component board and / or the earth leakage release; the second contact mechanism comprises a second moving contact as the moving contact, a second stationary contact as the stationary contact and a second driving member as the driving member, the second moving contact and the second stationary contact are connected in series to a test circuit for generating an earth leakage test signal.

[0010] Preferably,

[0011] The earth leakage release, the second moving contact, the second stationary contact and the second driving member are respectively mounted on the mounting seat; and / or the first moving contact, the first stationary contact and the first driving member are respectively mounted on the mounting seat.

[0012] Preferably, the earth leakage protection shell is provided with an unlocking member matched with the earth leakage release, and an indication button matched with the unlocking member, the indication button and the mounting seat are arranged along the length direction of the earth leakage protection shell, and pressing the indication button can make the indication button be locked and positioned in the position of the earth leakage protection shell by the unlocking member, when an earth leakage fault occurs, the earth leakage release is actuated to drive the circuit breaker module to be tripped through the unlocking member, at the same time, the unlocking member releases the positioning of the indication button, and the first spring connected with the indication button drives the indication button to move out of the earth leakage protection shell.

[0013] Preferably, the earth leakage protection shell comprises a first half shell and a second half shell arranged oppositely, the first half shell is adjacent to the circuit breaker module, the mounting seat is arranged between the first half shell and the second half shell, the first mounting structure for mounting the first contact mechanism is arranged between the first half shell and the mounting seat, and the first driving member is connected with the handle of the adjacent circuit breaker module.

[0014] Preferably, the first mounting structure is integrally formed with the first half shell, or the first mounting structure is integrally formed with the mounting seat.

[0015] Preferably, the first mounting structure comprises a mounting shaft, the first driving member comprises a rotating part arranged rotatably, a linkage part and a driving part arranged oppositely on both sides of the rotating part, the rotating part is provided with a rotating hole sleeved on the mounting shaft, the driving part is used for pushing the first moving contact and the first stationary contact to contact, and the linkage part is arranged outside the earth leakage protection shell, the linkage part is provided with a linkage shaft protruding, and the linkage shaft is used for being inserted into the handle of the adjacent circuit breaker module for linkage.

[0016] Preferably, the mounting seat is provided with a second rotating hole sleeved on the mounting shaft.

[0017] Preferably, the first mounting structure includes a first mounting boss, the first mounting boss is provided with a first moving mounting groove and a first stationary mounting groove, the first moving mounting groove and the first stationary mounting groove are respectively used to limit the first moving contact and the first stationary contact.

[0018] Preferably, the mounting base includes a first side plate corresponding to the first mounting structure and a second side plate corresponding to the first driving member. The first side plate contacts the first mounting boss of the first mounting structure and is used to limit the first moving contact member and the first stationary contact member on the first mounting boss. The second side plate contacts the first driving member and is used to limit the first driving member on the mounting shaft. The second side plate is provided with a second rotating hole for passing through the mounting shaft.

[0019] Preferably, the first side plate and the second side plate are located in different planes. When the first side plate contacts the first mounting boss, the second side plate is located on the side of the first mounting boss and contacts the rotating part of the first driving member. The second side plate and the side of the first mounting boss are either in contact or spaced apart.

[0020] Preferably, the second side plate is provided with an arc-shaped guide groove, and the driving part of the first driving member is provided with a driving boss that protrudes along the width direction of the leakage protection housing. The driving boss is inserted into the guide groove for sliding engagement or spaced out.

[0021] Preferably, the mounting base further includes an upper side plate and a lower side plate disposed opposite to each other, and a third side plate connected between the upper side plate and the lower side plate. The upper side plate, the lower side plate and the third side plate are disposed on the side of the second side plate away from the first driving member, and the second side plate, the upper side plate, the lower side plate and the third side plate form a tripping mounting groove for accommodating the leakage current trip device.

[0022] Preferably, a fourth side plate is provided on the side of the third side plate away from the tripping mounting groove, and the second contact mechanism is disposed between the third side plate and the fourth side plate.

[0023] Preferably, the leakage current trip device includes a magnetic yoke and a coil frame disposed inside the magnetic yoke. The inner side of the coil frame is provided with a leakage current tripping iron core, and the outer side of the coil frame is provided with a leakage current tripping coil for driving the iron core to move. The magnetic yoke includes two first magnetic yoke parts disposed opposite to each other, and a second magnetic yoke part connected between the two first magnetic yoke parts. The second magnetic yoke part is located on the side of the second side plate away from the first driving member. The second side plate is provided with a guide groove that cooperates with the first driving member at the position corresponding to the second magnetic yoke part.

[0024] Preferably, the third side plate and the fourth side plate are respectively provided with a first protrusion and a second protrusion facing each other. The first protrusion and the second protrusion divide the space between the third side plate and the fourth side plate into a first mounting groove for accommodating the second driving member and a second mounting groove for accommodating the second moving contact member and the second stationary contact member. A third mounting groove is provided between the first protrusion and the second protrusion, and the third mounting groove connects the first mounting groove and the second mounting groove. The third mounting groove is used to allow the second driving member to pass through, so that the second driving member can be inserted into the second mounting groove to drive the second moving contact member to move. A third limiting plate and a fourth limiting plate are respectively provided in the second mounting groove. The third limiting plate and the third side plate limit the second stationary contact member from opposite sides, and the fourth limiting plate and the fourth side plate limit the second moving contact member from opposite sides.

[0025] Preferably, the leakage protection housing includes at least one partition disposed between the first half-shell and the second half-shell, wherein the partition closest to the first half-shell is the first partition, the mounting base is disposed between the first half-shell and the first partition, the first side plate is provided with a raised first limiting boss, the first half-shell of the leakage protection housing is provided with a first limiting groove corresponding to the first limiting boss, the first limiting boss is used to insert into the first limiting groove for limiting engagement, the two opposite sides of the second side plate are respectively provided with a second limiting groove and a third limiting boss, the first half-shell is provided with a second limiting boss, the second limiting boss is used to insert into the second limiting groove for limiting engagement, the first partition is provided with a third limiting groove, the third limiting boss is used to insert into the third limiting groove for limiting engagement.

[0026] Preferably, the third limiting boss has a connecting hole in the middle for the connector to pass through, the connecting hole is connected to the bottom of the second limiting groove, and the connector can pass through the first half shell, the second half shell and the partition respectively to connect the mounting base, the first half shell, the second half shell and the partition.

[0027] Preferably, the first moving contact includes a first moving mounting portion, and a first moving contact portion and a first moving connecting portion respectively disposed at both ends of the first moving mounting portion; the first stationary contact includes a first stationary mounting portion, and a first stationary contact portion and a first stationary connecting portion respectively disposed at both ends of the first stationary mounting portion; the first moving mounting portion and the first stationary mounting portion are respectively inserted into the first moving mounting groove and the first stationary mounting groove for limiting engagement; the first moving connecting portion and the first stationary connecting portion are respectively connected to the wire; and the first moving contact portion is located between the first driving member and the first stationary contact portion.

[0028] The residual current circuit breaker in this embodiment isolates two sets of contact mechanisms via a mounting base, allowing both sets to be safely housed within the residual current trip unit module. These two sets of contact mechanisms can respectively perform leakage current testing and reverse wiring protection functions, and also feature a compact structure and small size. When the operating mechanism closes the residual current circuit breaker, it simultaneously closes the first contact mechanism to supply power to the electronic component board and / or the residual current trip unit. When the residual current circuit breaker opens, the operating mechanism simultaneously opens the first contact mechanism, preventing current from flowing through the electronic component board and / or the residual current trip unit. Even if the incoming and outgoing terminals of the circuit breaker module are mistakenly reversed during wiring, or if a highly inductive or capacitive load is connected, the residual current trip coil of the residual current trip unit and the electronic component board will not be damaged, greatly improving the reliability of the circuit breaker.

[0029] Furthermore, by arranging the first contact mechanism and the second contact mechanism along the width direction of the leakage protection enclosure, it is possible to avoid setting the first contact mechanism and the second contact mechanism along the length direction of the leakage protection circuit breaker, thereby reducing the size of the leakage protection circuit breaker in the length direction.

[0030] Furthermore, by assembling the residual current device (RCD), the second moving contact, the second stationary contact, the second driving component, and the mounting base into a trip unit module, the RCD can be assembled into a single trip unit module first, and then the trip unit module can be installed into the RCD module, which can reduce the difficulty of assembly. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the residual current circuit breaker of this utility model;

[0032] Figure 2 This is a schematic diagram of the internal structure of the circuit breaker module of this utility model;

[0033] Figure 3 This is an exploded view of the leakage current trip module of this utility model;

[0034] Figure 4 This is a front structural diagram of the mounting base of this utility model;

[0035] Figure 5 This is a schematic diagram of the back structure of the mounting base of this utility model;

[0036] Figure 6 This is a schematic diagram of the cooperation between the first contact mechanism and the first half-shell of this utility model;

[0037] Figure 7 This is a schematic diagram of the structure of the first driving component of this utility model;

[0038] Figure 8This is the circuit schematic diagram of this utility model;

[0039] In the picture:

[0040] 1. Residual current trip unit module 82. First mounting boss

[0041] 2. Circuit breaker module 111 First limit slot

[0042] 3. Leakage trip coil assembly 112 Second limit boss

[0043] 4 Mounting base 251 main lever

[0044] 5 First contact mechanism 252 jump buckle

[0045] 6 Second contact mechanism 253 latch

[0046] 11 First half-shell 254 connecting rod

[0047] 12 Second Half-Shell 255 Locking Shaft

[0048] 13 partition plate 411 first limiting boss

[0049] 21 Moving contact 421 Guide groove

[0050] 22 stationary contact 422 second limiting groove

[0051] 23 Overload tripping mechanism 423 Third limit boss

[0052] 24 Short-circuit tripping mechanism 424 connection hole

[0053] 25 Operating Mechanism 425 Second Rotating Hole

[0054] 26 handle 471 first protrusion

[0055] 31 Leakage trip coil 472 Second protrusion

[0056] 32 Leakage tripping core 473 First mounting slot

[0057] 33 Second yoke part 474 Second mounting slot

[0058] 41 First side plate 475 Third limiting plate

[0059] 42 Second side plate 476 Fourth limiting plate

[0060] 43 Upper side plate 511 First moving mounting part

[0061] 44 Lower side plate 512 First moving contact part

[0062] 45 Third side plate 513 First moving connection part

[0063] 46 Fourth side plate 521 First static mounting part

[0064] 51 First moving contact 522 First stationary contact

[0065] 52 First stationary contact 523 First stationary connection

[0066] 53 First driving component 531 Rotating part

[0067] 61 Second moving contact element 532 Linkage unit

[0068] 62 Second static contact 533 Drive unit

[0069] 63 Second driving component 534 Rotating hole

[0070] 71 Unlocking Part 535 Linkage Shaft

[0071] 72 Indicator Buttons 536 Drive Boss

[0072] 81 mounting shaft Detailed Implementation

[0073] The following embodiments, in conjunction with the accompanying drawings, further illustrate the specific implementation of the residual current circuit breaker of this utility model. The residual current circuit breaker of this utility model is not limited to the descriptions in the following embodiments.

[0074] like Figures 1-2 As shown, the residual current circuit breaker in this embodiment includes a residual current trip unit module 1 and at least one circuit breaker module 2 arranged side by side along the width of the circuit breaker. This embodiment has three circuit breaker modules 2 arranged side by side. When the circuit breaker module 2 is a phase, it includes a main circuit consisting of an incoming terminal, an outgoing terminal, a moving contact 21, a stationary contact 22, an overload tripping mechanism 23, and a short-circuit tripping mechanism 24, as well as a mechanism for driving...

[0075] An operating mechanism 25 is used to connect and separate the moving contact 21 and the stationary contact 22. The inlet and outlet terminals are used to connect the power supply and the load, respectively. The moving contact 21 and the stationary contact 22 are connected to the inlet and outlet terminals, respectively. The overload tripping mechanism 23 and the short-circuit tripping mechanism 24 are connected in series in the main circuit. The handle 26 drives the moving contact 21 to contact or separate from the stationary contact 22 through the operating mechanism 25, thereby realizing the conduction and disconnection of the main circuit of the circuit breaker module 2. When the circuit breaker module 2 is an N-pole circuit breaker, it usually only includes the inlet terminal, the outlet terminal, the moving contact 21 and the stationary contact 22, and the operating mechanism 25 used to drive the moving contact 21 to contact and separate from the stationary contact 22. The overload tripping mechanism 23 and the short-circuit tripping mechanism 24 are not provided. Of course, the circuit breaker module 2 can also be without an N-pole circuit breaker module 2, and only a phase-pole circuit breaker module 2 can be provided. The residual current trip module 1 includes a zero-sequence current transformer, an electronic component board, and a residual current trip unit 3. The zero-sequence current transformer is electrically connected to the electronic component board, and the electronic component board is electrically connected to the residual current trip unit 3. The main circuits of the three circuit breaker modules 2 pass through the zero-sequence current transformers respectively. The zero-sequence current transformers are used to sense the leakage current in the main circuit and transmit the leakage signal to the leakage detection circuit of the electronic component board. The leakage detection circuit is used to process the leakage signal and drive the residual current trip unit 3 to act when the leakage signal meets the conditions, so that the residual current trip unit 3 drives the operating mechanism 25 to trip. The tripping operating mechanism 25 drives the moving contact 21 and the stationary contact 22 to separate, disconnecting the main circuit to realize the protection function. Figure 1 The left-right direction represents the width of the circuit breaker, the up-down direction represents its length, and the direction perpendicular to the drawing represents its height. Figure 2 The left-right direction is the length direction of the circuit breaker, and the up-down direction is the height direction of the circuit breaker. This is a well-known technology in this field.

[0076] The operating mechanism 25 includes a main lever 251 and a mechanism return spring connected to the main lever 251. The main lever 251 is respectively provided with a rotatable latch 252 and a locking buckle 253, which are engaged. A connecting rod 254 is provided between the latch 252 and the handle 26. The two ends of the connecting rod 254 are rotatably connected to the handle 26 and the latch 252 respectively, so that the handle 26 is connected to the latch 252 via the connecting rod 254. When 252 and 253 are engaged, 253 locks the jump buckle 252 to the main lever 251. When the handle 26 pushes the jump buckle 252 through the connecting rod 254, the jump buckle 252 can drive the contact 21 to rotate. When the handle 26 rotates in two opposite directions, the main lever 251 can drive the moving contact 21 to contact and separate from the stationary contact 22. When the moving contact 21 contacts the stationary contact 22, the main lever 251 compresses the mechanism return spring and is locked by the handle 26.

[0077] When the leakage current, short circuit current, and overload current meet the conditions, the leakage current 3, overload tripping mechanism 23, and short circuit tripping mechanism 24 trigger the latch 253 to unlock the trip latch 252, thereby driving the operating mechanism 25 to trip. At this time, when the handle 26 rotates, it cannot drive the contact 21 to support the rotation through the trip latch 252, and the handle 26 loses its lock on the main lever 251. The mechanism reset spring is released, and when the mechanism reset spring is released, it drives the contact 21 to support the rotation, so that the moving contact 21 separates from the stationary contact 22, thus realizing the functions of leakage protection, short circuit protection, and overload protection.

[0078] The short-circuit trip device typically includes a short-circuit trip coil and a short-circuit iron core driven by the short-circuit trip coil. The short-circuit trip coil is connected to the stationary contact 22. When the short-circuit current flowing through the short-circuit trip coil meets the operating conditions, the short-circuit trip coil drives the short-circuit iron core to move, and the short-circuit iron core directly or indirectly triggers the latch 253 and the trip latch 252 to release.

[0079] The overload trip device typically includes a bimetallic strip connected to the moving contact 21. When the overload current flowing through the bimetallic strip meets the operating conditions, the bimetallic strip bends due to the temperature rise, thereby directly or indirectly triggering the latch 253 and the trip latch 252 to release.

[0080] The leakage current trip unit 3 includes a leakage current trip coil 31 and a leakage current trip core 32 driven by the leakage current trip coil 31. The electronic component board is provided with a switching element and a leakage current detection circuit. The switching element is connected in series in the circuit that supplies power to the leakage current trip unit 3 and draws power from the power source. The leakage current detection circuit can control the switching element to close and open. The leakage current detection circuit closes the switching element when the leakage current in the main circuit of the circuit breaker module 2 meets the condition. The switching element can be an electronic switch such as a relay or a MOSFET.

[0081] like Figures 3-5 As shown in Figures 8 and 9, one improvement of this embodiment is that the leakage current trip module 1 includes a mounting base 4 and two sets of contact mechanisms disposed opposite to each other on both sides of the mounting base 4.

[0082] Both sets of contact mechanisms include a moving contact, a stationary contact, and a driving element. The driving element controls the contact and separation of the corresponding moving contact with the stationary contact.

[0083] One set of contact mechanism's driving element is linked to the circuit breaker module 2. The moving contact and the stationary contact are connected in series to the power supply circuit that supplies power to the electronic component board and / or the leakage current trip unit 3. When the main circuit of the circuit breaker module 2 is closed, the driving element can close the set of contact mechanism to make the power supply circuit conduct, and when the main circuit of the circuit breaker module 2 is opened, the driving element can open the set of contact mechanism to make the power supply circuit disconnect.

[0084] The driving element of another set of contact mechanisms extends outside the leakage current trip module 1 for manual operation of the driving element. The moving contact and the stationary contact are connected in series to the test circuit for generating leakage current test signals. The driving element can close the set of contact mechanisms to generate leakage current test signals in the test circuit.

[0085] The residual current circuit breaker in this embodiment isolates two sets of contact mechanisms through mounting base 4, allowing the two sets of contact mechanisms to be safely installed in the residual current trip module. The two sets of contact mechanisms can respectively realize the functions of leakage current test and reverse wiring protection, and also have the characteristics of compact structure and small size.

[0086] Furthermore, the leakage current trip module 1 includes a leakage current protection housing, the mounting base 4 is disposed in the leakage current protection housing, and the two sets of contact mechanisms are a first contact mechanism 5 and a second contact mechanism 6, which are disposed opposite to each other on both sides of the mounting base 4 along the width direction of the leakage current protection housing. The first contact mechanism 5 is disposed on the side of the mounting base 4 closer to the circuit breaker module 2.

[0087] The first contact mechanism 5 includes a first moving contact 51, a first stationary contact 52, and a first driving member 53. The first moving contact 51 and the first stationary contact 52 are connected in series to the circuit that supplies power to the electronic component board and / or the leakage current trip unit 3. The first moving contact 51, the first stationary contact 52, and the first driving member 53 are the moving contact, stationary contact, and driving member of the contact mechanism. The first driving member 53 is linked to the circuit breaker module 2, such as by connecting the first driving member 53 to the handle 26 of the circuit breaker module 2, or by connecting the first driving member 53 to the handle 26 of the circuit breaker module 2. When the operating mechanism 25 is connected, the handle 26 or the operating mechanism 25 drives the main circuit of the circuit breaker module 2 to close, and simultaneously drives the first driving member 53 to drive the first moving contact 51 to contact the first stationary contact 52 to close the circuit that supplies power to the electronic component board and / or the leakage current trip unit 3. When the handle 26 or the operating mechanism 25 drives the main circuit of the circuit breaker module 2 to open, the first driving member 53 drives the first moving contact 51 and the first stationary contact 52 to separate to disconnect the circuit that supplies power to the electronic component board and / or the leakage current trip unit 3.

[0088] The first moving contact 51 and the first stationary contact 52 constitute a leakage current supply contact, connected in series to the power supply circuit that supplies power to the electronic component board and / or the leakage current trip unit 3. In one embodiment where the leakage current supply contact is connected to the power supply circuit, the electronic component board draws power from the power source through the leakage current supply contact, and the circuit supplying power to the electronic component board serves as the power supply circuit. The leakage current supply contact is only used to control the power supply circuit supplying power to the electronic component board. Alternatively, the leakage current trip coil 31 and the leakage current supply contact are connected in series to draw power from the power source as the power supply circuit, and the leakage current supply contact is used to control the power supply circuit supplying power to the leakage current trip coil 31 of the leakage current trip unit 3. Of course, the leakage current supply contact can also be used to control a power supply circuit that simultaneously supplies power to both the electronic component board and the leakage current trip coil 31.

[0089] When the handle 26 drives the operating mechanism 25 to close the residual current circuit breaker, it simultaneously drives the first moving contact 51 and the first stationary contact 52 to close, supplying power to the electronic component board and / or the residual current trip unit 3. After the residual current detection circuit detects a residual current fault, it triggers the switching element to close. The residual current trip coil 31 attracts the residual current trip core 32 to move. When the residual current trip core 32 moves, it triggers the latch 253 of the circuit breaker module 2 to unlock the trip latch 252. The operating mechanism 25 drives the moving contact 21 to separate from the stationary contact 22 and disconnects the main circuit of the circuit breaker module 2. At the same time, the operating mechanism 25 of the circuit breaker pole drives the first moving contact 51 to separate from the first stationary contact 52 through the driving component 6, stopping the supply of power to the electronic component board and / or the residual current trip coil 31.

[0090] When the operating mechanism 25 closes the residual current circuit breaker, it simultaneously closes the first contact mechanism 5 to supply power to the electronic component board and / or the residual current trip unit 3. When the residual current circuit breaker opens, the operating mechanism 25 simultaneously opens the first contact mechanism 5, preventing current from passing through the electronic component board and / or the residual current trip unit 3. Even if the incoming and outgoing terminals of the circuit breaker module 2 are mistakenly reversed during wiring, or if a highly inductive or capacitive load is connected, the residual current trip coil 31 of the residual current trip unit 3 and the electronic component board will not be burned out, which can greatly improve the reliability of the circuit breaker.

[0091] The second contact mechanism 6 includes a second moving contact 61, a second stationary contact 62, and a second driving member 63. The second moving contact 61, the second stationary contact 62, and the second driving member 63 are the moving contact, stationary contact, and driving member of the contact mechanism. The second driving member 63 is a test button. The second driving member 63 extends to the outside of the leakage protection housing for pressing. The second driving member 63 is used to drive the second moving contact 61 to contact the second stationary contact 62. The second moving contact 61 and the second stationary contact 62 are connected in series in the test circuit passing through the zero-sequence current transformer. Under external force, the second driving member 63 can drive the second moving contact 61 to contact the second stationary contact 62 and conduct the test circuit, simulating the generation of a leakage test signal to test whether the circuit breaker can disconnect the line.

[0092] In this embodiment, the residual current circuit breaker is arranged in the residual current protection housing along the width direction of the housing via the first contact mechanism 5 and the second contact mechanism 6. This avoids the first contact mechanism 5 and the second contact mechanism 6 being arranged along the length direction of the residual current circuit breaker, thus reducing the size of the residual current circuit breaker in the length direction.

[0093] like Figures 4-5 As shown, the residual current device (RCD) 3, the second moving contact 61, the second stationary contact 62, and the second driving component 63 are respectively mounted on the mounting base 4. The RCD 3, the second moving contact 61, the second stationary contact 62, the second driving component 63, and the mounting base 4 are combined to form a trip unit module, which is then installed into the RCD module 1. By assembling the RCD 3, the second moving contact 61, the second stationary contact 62, the second driving component 63, and the mounting base 4 into a single trip unit module, the assembly difficulty can be reduced. After the circuit breaker is closed, pressing the second drive component 63 can drive the second moving contact component 61 to contact the second stationary contact component 62 and conduct the test circuit, simulating the generation of a leakage current test signal to test whether the circuit breaker can disconnect the line and to check whether the leakage current protection function is normal.

[0094] Furthermore, the leakage protection housing is provided with an unlocking member 71 that cooperates with the leakage trip unit 3, and an indicator button 72 that cooperates with the unlocking member 71. The indicator button 72 and the mounting base 4 are arranged opposite to each other along the length of the leakage protection housing. Pressing the indicator button 72 can lock and limit the indicator button 72 to a position retracted into the leakage protection housing by the unlocking member 71. When a leakage fault occurs, the leakage trip unit 3 drives the circuit breaker module 2 to trip through the unlocking member 71. At the same time, the unlocking member 71 releases the limitation on the indicator button 72, and the first spring connected to the indicator button 72 drives the indicator button 72 to move out of the leakage protection housing, protruding from the leakage protection housing, and the indicator button 72 indicates that a leakage fault has occurred. In this embodiment, the unlocking member 71 is rotatably arranged, and the indicator button 72 is linearly slidably mounted on the leakage protection housing. The leakage trip unit 3 triggers and drives the unlocking member 71 to rotate. The unlocking member 71 pushes the latch 253 of the operating mechanism, causing the circuit breaker module 2 to trip.

[0095] like Figure 3 As shown, the leakage protection housing includes a first half-shell 11 and a second half-shell 12 disposed opposite to each other, and at least one partition 13 disposed between the first half-shell 11 and the second half-shell 12. The first half-shell 11 is adjacent to the circuit breaker module 2, and the partition 13 closest to the first half-shell 11 is the first partition. The mounting base 4 is disposed between the first half-shell 11 and the first partition. The first half-shell 11 and the second half-shell 12 may have only one partition 13, multiple partitions 13, or no partition 13; all of these are within the protection scope of this utility model.

[0096] Furthermore, a first mounting structure is provided between the first half-shell 11 of the leakage current protection housing and the mounting base 4. The first mounting structure is used to install the first moving contact 51, the first stationary contact 52, and the first driving member 53. The first driving member 53 is used to push the first moving contact 51, so that the first moving contact 51 contacts the first stationary contact 52. In this embodiment, the first mounting structure is integrally formed with the first half-shell 11, and the first moving contact 51, the first stationary contact 52, and the first driving member 53 are respectively mounted on the leakage current protection housing through the first mounting structure. Preferably, the first driving member 53 is connected to the handle of the adjacent circuit breaker module 2.

[0097] In another embodiment, the first mounting structure is integrally formed with the mounting base 4, so that the first moving contact 51, the first stationary contact 52, and the first driving component 53 are respectively mounted onto the mounting base 4 through the first mounting structure. Thus, the first moving contact 51, the first stationary contact 52, the first driving component 53, the leakage current trip unit 3, the second moving contact 61, the second stationary contact 62, the second driving component 63, and the mounting base 4 are assembled into a single trip unit module.

[0098] Specifically, the first mounting structure of this embodiment includes a mounting shaft 81 and a first mounting boss 82 disposed on one radial side of the mounting shaft 81. The first driving member 53 is rotatably disposed on the mounting shaft 81. The first mounting boss 82 is provided with a first moving mounting groove and a first stationary mounting groove. The first moving contact member 51 includes a first moving mounting portion 511 and a first moving contact portion 512 and a first moving connecting portion 513 respectively disposed at both ends of the first moving mounting portion 511. The first stationary contact member 52 includes a first stationary mounting portion 521 and a first stationary contact portion 522 and a first stationary connecting portion 523 respectively disposed at both ends of the first stationary mounting portion 521. The first moving mounting portion 511 and the first stationary mounting portion 521 are respectively inserted into the first moving mounting groove and the first stationary mounting groove for limiting and engagement. The first moving connecting portion 513 and the first stationary connecting portion 523 are respectively connected to the wire. The first moving contact portion 512 is located between the first driving member 53 and the first stationary contact portion 522.

[0099] like Figures 6-7 As shown, the first driving member 53 includes a rotating part 531 rotatably disposed, and a linkage part 532 and a driving part 533 disposed opposite to each other on both sides of the rotating part 531. The rotating part 531 is provided with a rotating hole 534 sleeved on the mounting shaft 81. The driving part 533 is used to push the first moving contact 51 to contact the first stationary contact 52. The linkage part 532 extends outside the leakage protection housing. The linkage part 532 is provided with a protruding linkage shaft 535, which is used to insert into the handle 26 of the adjacent circuit breaker module 2. The first driving member 53 is linked with the handle 26 of the circuit breaker module 2. When the main circuit of the circuit breaker module 2 is connected, the first driving member 53, driven by the handle 26, pushes the moving contact part of the first moving contact member 51 to contact the first stationary contact member 52, thus connecting the power supply circuit. When the main circuit of the circuit breaker module 2 is disconnected, the first driving member 53, driven by the handle 26, moves away from the moving contact part of the first moving contact member 51, causing the moving contact part of the first moving contact member 51 to return to a position separated from the first stationary contact member 52, thus disconnecting the power supply circuit. It can be understood that the linkage part 532 may not extend outside the leakage protection housing, or a through hole may be provided in the leakage protection housing for the linkage part 532 to pass through, so that the linkage part 532 can be directly inserted into the circuit breaker module 2 and linked with the handle. In addition, the linkage part 532 may also be directly linked with the operating mechanism of the circuit breaker module 2, replacing the above-mentioned linkage with the handle, all of which are within the protection scope of this utility model.

[0100] like Figures 3-5As shown, the mounting base 4 includes a first side plate 41 corresponding to the first mounting structure and a second side plate 42 corresponding to the first driving member 53. The first side plate 41 contacts the first mounting boss 82 of the first mounting structure and is used to limit the first moving contact member 51 and the first stationary contact member 52 on the first mounting boss 82. The second side plate 42 contacts the first driving member 53 and is used to limit the first driving member 53 on the mounting shaft 81 to prevent the first driving member 53 from moving axially along the mounting shaft 81. The second side plate 42 is provided with a second rotating hole 425 for passing through the mounting shaft 81.

[0101] Furthermore, the thickness of the first mounting boss 82 is different from the thickness of the rotating part 531 of the first driving member 53. The first side plate 41 and the second side plate 42 are located in different planes. When the first side plate 41 contacts the first mounting boss 82, the second side plate 42 is located on the side of the first mounting boss 82 and contacts the rotating part 531 of the first driving member 53. The second side plate 42 and the side of the first mounting boss 82 are either in contact or spaced apart. When in contact, it can serve as a limit for the mounting seat 4.

[0102] Furthermore, the second side plate 42 is provided with an arc-shaped guide groove 421, and the driving part 533 of the first driving member 53 is provided with a driving boss 536 protruding along the width direction of the leakage protection housing. The driving boss 536 is used to push the first moving contact member 51 to contact the first stationary contact member 52. The driving boss 536 is inserted into the guide groove 421 for sliding cooperation or spaced out. The guide groove 421 can guide the driving boss 536 or avoid the driving boss 536, both of which are within the protection scope of this utility model.

[0103] like Figures 4-5 As shown, the mounting base 4 also includes an upper side plate 43 and a lower side plate 44 disposed opposite to each other, and a third side plate 45 connected between the upper side plate 43 and the lower side plate 44. The upper side plate 43, the lower side plate 44 and the third side plate 45 are disposed on the side of the second side plate 42 away from the first driving member 53. The second side plate 42, the upper side plate 43, the lower side plate 44 and the third side plate 45 form a tripping mounting groove for accommodating the leakage current tripping device 3.

[0104] Furthermore, a fourth side plate 46 is provided on the side of the third side plate 45 away from the release mounting groove. A second moving contact 61, a second stationary contact 62, and a second driving member 63 are disposed between the third side plate 45 and the fourth side plate 46. The third side plate 45 and the fourth side plate 46 are respectively provided with a first protrusion 471 and a second protrusion 472 facing each other. The first protrusion 471 and the second protrusion 472 divide the space between the third side plate 45 and the fourth side plate 46 into a first mounting groove 473 for accommodating the second driving member 63 and a second mounting groove 474 for accommodating the second moving contact 61 and the second stationary contact 62. A third mounting groove is provided between the first protrusion 471 and the second protrusion 472, and the third mounting groove connects to the first mounting groove. Between groove 473 and second mounting groove 474, the third mounting groove is used to pass through the second driving member 63, so that the second driving member 63 can be inserted into the second mounting groove 474 to drive the second moving contact member 61 to move. The second mounting groove 474 is provided with a third limiting plate 475 and a fourth limiting plate 476 respectively. A second static mounting groove for limiting the second static contact member 62 is formed between the third limiting plate 475 and the third side plate 45. The third limiting plate 475 and the third side plate 45 limit the second static contact member 62 from opposite sides respectively. A second moving mounting groove for limiting the second moving contact member 61 is formed between the fourth limiting plate 476 and the fourth side plate 46. The fourth limiting plate 476 and the fourth side plate 46 limit the second moving contact member 61 from opposite sides respectively.

[0105] Furthermore, the leakage current trip device 3 includes a U-shaped magnetic yoke and a coil frame disposed inside the magnetic yoke. The inner side of the coil frame is provided with a leakage current tripping iron core 32, and the outer side of the coil frame is provided with a leakage current tripping coil 31 for driving the iron core to move. The magnetic yoke includes two first magnetic yoke parts disposed opposite to each other, and a second magnetic yoke part 33 connected between the two first magnetic yoke parts. The second magnetic yoke part 33 is located on the side of the second side plate 42 away from the first driving member 53. The second side plate 42 is provided with a guide groove 421 corresponding to the second magnetic yoke part 33 to cooperate with the first driving member 53.

[0106] like Figures 3-5As shown, the first side plate 41 is provided with a raised first limiting boss 411, and the first half shell 11 of the leakage protection housing is provided with a first limiting groove 111 corresponding to the first limiting boss 411. The first limiting boss 411 is used to be inserted into the first limiting groove 111 for limiting engagement. The two opposite sides of the second side plate 42 are respectively provided with a second limiting groove 422 and a third limiting boss 423. The first half shell 11 is provided with a second limiting boss 112, which is used to be inserted into the second limiting groove 422 for limiting engagement. The first partition is provided with a third limiting groove (not shown in the figure), and the third limiting boss 423 is used to be inserted into the third limiting groove for limiting engagement. Preferably, the third limiting boss 423 has a connecting hole 424 (not shown) in the middle for the connector to pass through. The connecting hole 424 communicates with the bottom of the second limiting groove 422. The connector can pass through the first half-shell 11, the second half-shell 12, and the partition 13 respectively to connect the mounting base 4, the first half-shell 11, the second half-shell 12, and the partition 13. The connector can be a screw or a snap-fit ​​connector.

[0107] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0108] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A residual current circuit breaker, comprising a residual current trip module (1) and at least one circuit breaker module (2) arranged side by side, wherein the residual current trip module (1) includes a zero-sequence current transformer, an electronic component board and a residual current trip unit (3), and the circuit breaker module (2) includes a handle (26), an operating mechanism and a main circuit, wherein the handle (26) drives the main circuit to be turned on and off through the operating mechanism, and the residual current trip unit (3) includes a residual current trip coil (31) and a residual current trip core (32) driven by the residual current trip coil (31). Its features are: The leakage current trip module (1) includes a leakage current protection housing and a mounting base (4) disposed in the leakage current protection housing. Two sets of contact mechanisms are respectively provided on opposite sides of the mounting base (4) along the width direction of the leakage current protection housing. Each set of contact mechanisms includes a moving contact, a stationary contact, and a driving component. The driving component is used to control the contact and separation of the corresponding moving contact with the stationary contact. The two sets of contact mechanisms are a first contact mechanism (5) and a second contact mechanism (6). The first contact mechanism (5) is set on the side of the mounting base (4) near the circuit breaker module (2) and linked with the circuit breaker module (2). The moving contact and the stationary contact are connected in series to the power supply circuit that supplies power to the electronic component board and / or the leakage trip unit (3). When the main circuit of the circuit breaker module (2) is closed, the driving component closes the contact mechanism to make the power supply circuit conduct, and when the main circuit of the circuit breaker module (2) is opened, the contact mechanism opens to make the power supply circuit disconnect. The moving and stationary contacts of the second contact mechanism (6) are connected in series to the test circuit for generating a leakage current test signal. The driving element can close the set of contact mechanisms to make the test circuit generate a leakage current test signal.

2. The residual current circuit breaker according to claim 1, characterized in that: The first contact mechanism (5) includes a first moving contact (51) as a moving contact, a first stationary contact (52) as a stationary contact, and a first driving member (53) as a driving member. The first moving contact (51) and the first stationary contact (52) are connected in series to a power supply circuit that supplies power to the electronic component board and / or the leakage trip unit (3). The second contact mechanism (6) includes a second moving contact (61) as a moving contact, a second stationary contact (62) as a stationary contact, and a second driving member (63) as a driving member. The second moving contact (61) and the second stationary contact (62) are connected in series to a test circuit for generating a leakage test signal.

3. The residual current circuit breaker according to claim 2, characterized in that: The leakage trip unit (3), the second moving contact (61), the second stationary contact (62), and the second drive unit (63) are respectively mounted on the mounting base (4); and / or, the first moving contact (51), the first stationary contact (52), and the first drive unit (53) are respectively mounted on the mounting base (4).

4. The residual current circuit breaker according to claim 1, characterized in that: The leakage protection housing is provided with an unlocking component (71) that cooperates with the leakage trip unit (3) and an indicator button (72) that cooperates with the unlocking component (71). The indicator button (72) and the mounting base (4) are arranged along the length of the leakage protection housing. Pressing the indicator button (72) can lock the indicator button (72) in the position of being recessed into the leakage protection housing by the unlocking component (71). When a leakage fault occurs, the leakage trip unit (3) will activate and drive the circuit breaker module (2) to trip through the unlocking component (71). At the same time, the unlocking component (71) will release the limit on the indicator button (72), and the first spring connected to the indicator button (72) will drive the indicator button (72) to move out of the leakage protection housing.

5. The residual current circuit breaker according to claim 2, characterized in that: The leakage protection housing includes a first half-shell (11) and a second half-shell (12) arranged opposite to each other. The first half-shell (11) is adjacent to the circuit breaker module (2). The mounting base (4) is disposed between the first half-shell (11) and the second half-shell (12). A first mounting structure for mounting the first contact mechanism (5) is provided between the first half-shell (11) and the mounting base (4). The first driving member (53) is connected to the handle (26) of the adjacent circuit breaker module (2).

6. The residual current circuit breaker according to claim 5, characterized in that: The first mounting structure is integrally formed with the first half shell (11), or the first mounting structure is integrally formed with the mounting base (4).

7. The residual current circuit breaker according to claim 5, characterized in that: The first mounting structure includes a mounting shaft (81), and the first driving member (53) includes a rotating part (531) that is rotatably disposed, and a linkage part (532) and a driving part (533) disposed opposite to each other on both sides of the rotating part (531). The rotating part (531) is provided with a rotating hole (534) sleeved on the mounting shaft (81). The driving part (533) is used to push the first moving contact (51) to contact the first stationary contact (52). The linkage part (532) extends outside the leakage protection housing. The linkage part (532) is provided with a protruding linkage shaft (535). The linkage shaft (535) is used to be inserted into the handle (26) of the adjacent circuit breaker module (2) for linkage.

8. The residual current circuit breaker according to claim 7, characterized in that: The mounting base (4) is provided with a second rotating hole (425) that is fitted onto the mounting shaft (81).

9. The residual current circuit breaker according to claim 7, characterized in that: The first mounting structure includes a first mounting boss (82), and the first mounting boss (82) is provided with a first moving mounting groove and a first stationary mounting groove. The first moving mounting groove and the first stationary mounting groove are respectively used to limit the first moving contact (51) and the first stationary contact (52).

10. The residual current circuit breaker according to claim 9, characterized in that: The mounting base (4) includes a first side plate (41) corresponding to the first mounting structure and a second side plate (42) corresponding to the first driving member (53). The first side plate (41) contacts the first mounting boss (82) of the first mounting structure and is used to limit the first moving contact member (51) and the first stationary contact member (52) on the first mounting boss (82). The second side plate (42) contacts the first driving member (53) and is used to limit the first driving member (53) on the mounting shaft (81). The second side plate (42) is provided with a second rotating hole (425) for passing through the mounting shaft (81).

11. The residual current circuit breaker according to claim 10, characterized in that: The first side plate (41) and the second side plate (42) are located in different planes. When the first side plate (41) contacts the first mounting boss (82), the second side plate (42) is located on the side of the first mounting boss (82) and contacts the rotating part (531) of the first driving member (53). The second side plate (42) and the side of the first mounting boss (82) are either in contact or spaced apart.

12. The residual current circuit breaker according to claim 10, characterized in that: The second side plate (42) is provided with an arc-shaped guide groove (421), and the driving part (533) of the first driving member (53) is provided with a driving boss (536) that protrudes along the width direction of the leakage protection housing. The driving boss (536) is inserted into the guide groove (421) for sliding engagement or spaced out.

13. The residual current circuit breaker according to claim 10, characterized in that: The mounting base (4) further includes an upper side plate (43) and a lower side plate (44) disposed opposite to each other, and a third side plate (45) connected between the upper side plate (43) and the lower side plate (44). The upper side plate (43), the lower side plate (44) and the third side plate (45) are disposed on the side of the second side plate (42) away from the first driving member (53). The second side plate (42), the upper side plate (43), the lower side plate (44) and the third side plate (45) form a tripping mounting groove for accommodating the leakage current trip unit (3).

14. The residual current circuit breaker according to claim 13, characterized in that: The third side plate (45) is provided with a fourth side plate (46) on the side away from the release mounting groove, and the second contact mechanism (6) is disposed between the third side plate (45) and the fourth side plate (46).

15. The residual current circuit breaker according to claim 13, characterized in that: The leakage trip device (3) includes a magnetic yoke and a coil frame disposed inside the magnetic yoke. The inner side of the coil frame is provided with a leakage trip iron core (32), and the outer side of the coil frame is provided with a leakage trip coil (31) for driving the iron core to move. The magnetic yoke includes two first magnetic yoke parts disposed opposite to each other, and a second magnetic yoke part (33) connected between the two first magnetic yoke parts. The second magnetic yoke part (33) is located on the side of the second side plate (42) away from the first driving member (53). The second side plate (42) and the second magnetic yoke part (33) are provided with a guide groove (421) that cooperates with the first driving member (53) at the position corresponding to the second magnetic yoke part (33).

16. The residual current circuit breaker according to claim 14, characterized in that: The third side plate (45) and the fourth side plate (46) are respectively provided with a first protrusion (471) and a second protrusion (472) protruding towards each other. The first protrusion (471) and the second protrusion (472) divide the space between the third side plate (45) and the fourth side plate (46) into a first mounting groove (473) for accommodating the second driving member (63) and a second mounting groove (474) for accommodating the second moving contact member (61) and the second stationary contact member (62). A third mounting groove is provided between the first protrusion (471) and the second protrusion (472), and the third mounting groove is connected to the first... Between the mounting slot (473) and the second mounting slot (474), the third mounting slot is used to pass through the second driving member (63), so that the second driving member (63) can be inserted into the second mounting slot (474) to drive the second moving contact member (61) to move. The second mounting slot (474) is provided with a third limiting plate (475) and a fourth limiting plate (476). The third limiting plate (475) and the third side plate (45) limit the second static contact member (62) from opposite sides, and the fourth limiting plate (476) and the fourth side plate (46) limit the second moving contact member (61) from opposite sides.

17. The residual current circuit breaker according to claim 10, characterized in that: The leakage protection housing includes at least one partition (13) disposed between the first half-shell (11) and the second half-shell (12), wherein the partition (13) closest to the first half-shell (11) is the first partition. The mounting base (4) is disposed between the first half-shell (11) and the first partition. The first side plate (41) is provided with a raised first limiting boss (411). The first half-shell (11) of the leakage protection housing is provided with a first limiting groove (111) corresponding to the first limiting boss (411). The first limiting boss (411) is used to be inserted into the first limiting groove (111) for limiting engagement. The second side plate (42) is provided with a second limiting groove (422) and a third limiting boss (423) on opposite sides. The first half shell (11) is provided with a second limiting boss (112), which is used to be inserted into the second limiting groove (422) for limiting engagement. The first partition is provided with a third limiting groove, and the third limiting boss (423) is used to be inserted into the third limiting groove for limiting engagement.

18. The residual current circuit breaker according to claim 17, characterized in that: The third limiting boss (423) has a connecting hole (424) in the middle for the connector to pass through. The connecting hole (424) is connected to the bottom of the second limiting groove (422). The connector can pass through the first half shell (11), the second half shell (12) and the partition (13) respectively to connect the mounting base (4), the first half shell (11), the second half shell (12) and the partition (13).

19. The residual current circuit breaker according to claim 9, characterized in that: The first moving contact (51) includes a first moving mounting portion (511), and a first moving contact portion (512) and a first moving connecting portion (513) respectively disposed at both ends of the first moving mounting portion (511). The first stationary contact (52) includes a first stationary mounting portion (521), and a first stationary contact portion (522) and a first stationary connecting portion (523) respectively disposed at both ends of the first stationary mounting portion (521). The first moving mounting portion (511) and the first stationary mounting portion (521) are respectively inserted into the first moving mounting groove and the first stationary mounting groove for limiting and matching. The first moving connecting portion (513) and the first stationary connecting portion (523) are respectively connected to the wire. The first moving contact portion (512) is located between the first driving member (53) and the first stationary contact portion (522).

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