Residual current circuit breaker with overcurrent protection

Abstract

A residual current circuit breaker with overcurrent protection, which comprises a residual current protection pole and a circuit breaker pole. The residual current protection pole is provided with a residual current power supply contact consisting of a moving contact member and a fixed contact member, and a driving member for driving the moving contact member to come into contact with and separate from the fixed contact member, wherein the residual current power supply contact consisting of the moving contact member and the fixed contact member is connected in series in a power supply circuit, which supplies power to an electronic component board and / or a residual current release, and the driving member is interlocked with an operating mechanism of the circuit breaker pole. When a main circuit of the circuit breaker pole is switched on, the driving member is driven by the operating mechanism to drive the moving contact member to come into contact with the fixed contact member, thereby closing the power supply circuit; and when the main circuit of the circuit breaker pole is switched off, the driving member is driven by the operating mechanism to drive the moving contact member to separate from the fixed contact member, or the driving member is driven by the operating mechanism to move away from the moving contact member, causing the moving contact member to reset to a position at which the moving contact member is separated from the fixed contact member, thereby opening the power supply circuit. Thus, damage caused by mistakenly reversing an incoming line terminal end and an outgoing line terminal of the circuit breaker pole during wiring can be avoided.

Description

Leakage protection circuit breaker

[0001] The present application claims priority to Chinese Patent Application No. 202411137231.7, filed on August 19, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of low-voltage electrical apparatus, in particular to a leakage protection circuit breaker. BACKGROUND

[0003] Low-voltage circuit breakers are used to distribute electric energy and to protect lines and equipment from overload and short circuits, and also for infrequent switching of lines and infrequent starting of motors. For electronic leakage circuit breakers, because the electronic component board takes power through one end of the main circuit, and usually the electronic component board takes power from the outgoing line end of the product, it is stipulated that the power source can only be connected to the incoming line end of the product. However, if the user mistakenly connects the power source to the outgoing line end of the product, the electronic component board will always be in a powered-on state. If there is a leakage current in the main circuit at this time, or a leakage current is simulated by pressing the test button, the leakage release will still act, and the release coil will be burned out, causing the leakage protection function to fail.

[0004] In addition, when the load is a high inductive or high capacitive load, if the main circuit power is suddenly disconnected, or the circuit breaker is disconnected, the high inductive or high capacitive load will generate a reverse electromotive force. Because the electronic component board of the electronic leakage circuit breaker takes power through the outgoing line end, the reverse electromotive force generated by the load will be directly added to the electronic component board. At this time, if there is a leakage current in the main circuit or the test button is pressed, the above-mentioned reverse electromotive force directly added to the electronic component board will be directly added to both ends of the leakage release coil, causing the coil to burn out and causing the leakage function to fail. SUMMARY

[0005] The present application aims to overcome at least one of the deficiencies of the prior art and provide a leakage protection circuit breaker.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A leakage protection circuit breaker, comprising a leakage protection pole and at least one circuit breaker pole arranged side by side, the leakage protection pole comprising a zero sequence current transformer, an electronic component board and a leakage release, the circuit breaker pole comprising a handle, an operating mechanism and a main circuit, the handle driving the main circuit to be turned on and turned off through the operating mechanism, the leakage release comprising a leakage release coil and a leakage release core driven by the leakage release coil,

[0008] The leakage protection pole is provided with a leakage power supply contact composed of a dynamic contact and a static contact, and a driving member for driving the dynamic contact to contact and separate from the static contact, the leakage power supply contact is connected in series in a power supply circuit for supplying power to the electronic component board and / or leakage tripping device, the driving member is connected with an operating mechanism of the circuit breaker pole,

[0009] When the main circuit of the circuit breaker pole is turned on, the driving member drives the dynamic contact to contact the static contact under the drive of the operating mechanism, and the power supply circuit is turned on.

[0010] When the main circuit of the circuit breaker pole is turned off, the driving member drives the dynamic contact to separate from the static contact under the drive of the operating mechanism, or the driving member moves away from the dynamic contact under the drive of the operating mechanism, and the dynamic contact is reset to a position separated from the static contact, and the power supply circuit is turned off.

[0011] Preferably, a sliding groove is arranged on the housing of the circuit breaker pole and / or the housing of the leakage protection pole, and the driving member is slidingly arranged in the sliding groove, and the driving member moves linearly along the length direction of the sliding groove under the drive of the operating mechanism.

[0012] Preferably, a sliding hole is arranged on the side wall of the housing of the circuit breaker pole and the housing of the leakage protection pole which are in close contact with each other as the sliding groove, and the driving member is slidingly arranged in the sliding groove, and the driving member moves linearly along the length direction of the sliding groove under the drive of the operating mechanism.

[0013] Preferably, the dynamic contact comprises a resilient portion arranged in the moving direction of the driving member, and the operating mechanism drives the driving member to move along the sliding groove and push the resilient portion to make the resilient portion contact the static contact when the circuit breaker pole is closed, and the operating mechanism drives the driving member to move along the sliding groove and move away from the resilient portion when the circuit breaker pole is opened or the operating mechanism is tripped due to a fault.

[0014] Preferably, a linkage hole is arranged on one side of the sliding groove, and the linkage hole is used for passing through a tripping shaft, one end of the tripping shaft is connected with the operating mechanism of the circuit breaker pole, and the leakage tripping device pushes the other end of the tripping shaft to make the tripping shaft drive the operating mechanism to trip when the leakage tripping device is actuated, and the linkage hole is communicated with the sliding hole.

[0015] Preferably, the operating mechanism comprises a rotating plate, a trip lever and a lock lever which are respectively arranged on the rotating plate and rotate, the trip lever is connected with a handle through a connecting rod, and the lock lever is used for locking the trip lever and the rotating plate to make the handle drive the contact through the trip lever to rotate, and the main circuit comprises a dynamic contact and a static contact, the dynamic contact is arranged on the rotating plate, and the rotating plate drives the dynamic contact to contact and separate from the static contact to turn on and turn off the main circuit when the rotating plate rotates.

[0016] Preferably, the lock catch comprises a rotating part and a locking part on one side of the rotating part, the rotating part is rotatably installed on the rotating plate through a lock catch rotating shaft, the locking part is used for locking the jump catch, the driving member is provided with a driving hole sleeved on the lock catch rotating shaft, and the lock catch is driven to move through the lock catch rotating shaft when the lock catch rotates with the rotating plate.

[0017] Preferably, the driving member comprises a driving rod and first and second bosses respectively arranged at two ends of the driving rod, the first and second bosses are oppositely arranged on the driving rod at two sides close to and away from the circuit breaker pole, the first boss is used for being inserted into the circuit breaker pole, and a driving hole is arranged on the first boss, and the second boss is protruded along the width direction of the shell and extends to the side surface of the moving contact.

[0018] Preferably, the second boss is provided with a pushing surface, the pushing surface is arranged at an oblique angle with the moving direction of the driving member, and the moving contact comprises an elastic part arranged in the moving direction of the driving member, and the elastic part is arranged in parallel with the pushing surface on the driving member when the elastic part does not contact the static contact.

[0019] Preferably, the second boss comprises a first protruding part and a second protruding part connected between the first protruding part and the driving rod, the width of the first protruding part is smaller than the width of the second protruding part, and the pushing surface is arranged on the first protruding part.

[0020] Preferably, the moving contact comprises a fixed part and an elastic part connected with the fixed part, the fixed part is fixedly arranged and connected into the power supply circuit, the shell of the leakage protection pole is provided with a first limiting groove for limiting the fixed part and a second limiting groove for limiting the static contact, one side of the elastic part close to the static contact is inclined, the driving member is located at one side of the elastic part away from the static contact, and the driving member is used for pushing the elastic part of the moving contact to bend towards the static contact and contact the static contact.

[0021] Preferably, the static contact is connected with a first wire, the moving contact is connected with a second wire, one end of the leakage release coil is connected with the second wire, the other end of the leakage release coil is connected with a third wire, the first wire and the third wire are respectively connected with an electronic component board, the first limiting groove and the second limiting groove are respectively provided with a first wiring port and a second wiring port on mutually faraway sides, and the first wiring port and the second wiring port are respectively used for penetrating the second wire and the first wire, so that the second wire and the first wire are respectively connected with the moving contact and the static contact.

[0022] Preferably, the electric leakage protection pole further comprises an indication mechanism matched with the electric leakage release, the indication mechanism comprises an indication button, a push plate and an indication spring, the indication button is slidingly arranged, the indication spring is connected with the indication button, the indication button comprises an indication part and a limiting part, pressing the indication part can make the indication button compress the indication spring to move to a first indication position in the direction of the retracted shell, at the same time, the push plate locks the limiting part to make the indication button locked in the first indication position; when the electric leakage release acts, the push plate drives the release shaft to make the operating mechanism of the circuit breaker pole release, at the same time, the push plate unlocks the limiting part, the indication spring drives the indication button to move, and the indication part moves to a second indication position in the direction of extending out of the shell.

[0023] Preferably, the electric leakage protection pole further comprises a test button and a test circuit, the test button is used to close the test circuit to simulate the electric leakage current signal, and the test button and the indication mechanism are arranged on opposite sides of the electric leakage release along the length direction of the shell of the electric leakage protection pole.

[0024] Preferably, the moving contact is arranged on the driving part, and the static contact is fixedly arranged in the electric leakage protection pole.

[0025] The electric leakage protection circuit breaker provided by the application comprises a shell, an operating mechanism, an electric leakage release, an electric leakage protection pole, an electronic component board and a driving part, the operating mechanism is arranged in the shell, the electric leakage release is arranged in the shell and connected with the operating mechanism, the electric leakage protection pole is arranged in the shell and connected with the electric leakage release, the electronic component board is arranged in the shell and connected with the electric leakage release, and the driving part is arranged in the shell and connected with the operating mechanism.

[0026] In addition, the one end of the driving part for connecting the operating mechanism is arranged between the push plate and the first side plate, which can improve the utilization of the space in the shell, avoid increasing the volume, make the driving part arranged on one side of the release shaft, make the sliding groove arranged adjacent to and communicated with the linkage hole, avoid making great changes to the overall structure of the circuit breaker shell, and reduce the processing cost.

[0027] In addition, the second protrusion is provided with a pushing surface, the pushing surface is arranged at an oblique angle with the moving direction of the driving part, and the elastic part is arranged in parallel with the pushing surface on the driving part when the elastic part does not contact the static contact. Through the parallel arrangement of the pushing surface and the elastic part, the driving part can push the moving contact, the cooperation between the two is more smooth, and the problems such as jamming are prevented. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 is a structural schematic diagram of the leakage protection circuit breaker of the present application;

[0029] Fig. 2 is a structural schematic diagram of the circuit breaker pole of the present application;

[0030] Figs. 3-4 are structural schematic diagrams of the leakage protection pole of the present application;

[0031] Fig. 5 is a schematic diagram of the cooperation of the circuit breaker pole, the driving member, the movable contact and the static contact of the present application;

[0032] Fig. 6 is a structural schematic diagram of the housing of the circuit breaker pole of the present application;

[0033] Fig. 7 is a structural schematic diagram of the operating mechanism, the movable contact and the overload release mechanism of the present application;

[0034] Fig. 8 is a structural schematic diagram of the driving member of the present application;

[0035] Fig. 9 is a circuit schematic diagram of the leakage power supply contact of the present application when the electronic component board is powered;

[0036] In the figures, leakage protection pole 1; circuit breaker pole 2; movable contact 21; static contact 22; overload release mechanism 23; short-circuit release mechanism 24; operating mechanism 25; handle 26; rotating plate 251; jump buckle 252; lock buckle 253; connecting rod 254; lock buckle rotating shaft 255; rotating part 256; locking part 257; leakage release 3; leakage release iron core 33; movable contact 4; elastic part 41; fixed part 42; static contact 5; driving member 6; sliding groove 60; driving hole 61; driving rod 62; first boss 63; second boss 64; first protruding part 641; second protruding part 642; pushing surface 65; linkage hole 601; first side plate 11; second side plate 12; first partition plate 13; second partition plate 14; first limiting groove 101; second limiting groove 102; first wiring port 1011; second wiring port 1021; second wire 72; indicating mechanism 8; indicating button 81; push plate 82; indicating part 811; limiting part 812. DETAILED DESCRIPTION

[0037] The following embodiments, given in conjunction with the accompanying drawings, further illustrate the specific embodiments of the leakage protection circuit breaker of the present application. The leakage protection circuit breaker of the present application is not limited to the description of the following embodiments.

[0038] As shown in Fig. 1-2, the leakage protection circuit breaker of the embodiment comprises leakage protection poles 1 and at least one circuit breaker pole 2 arranged side by side, four circuit breaker poles 2 are arranged side by side in the embodiment, when the circuit breaker poles 2 are phase poles, the circuit breaker pole 2 comprises a main circuit composed of an incoming line end, an outgoing line end, a moving contact 21, a static contact 22, an overload tripping mechanism 23 and a short-circuit tripping mechanism 24, and an operating mechanism 25 for driving the moving contact 21 to contact and separate from the static contact 22, the incoming line end and the outgoing line end are respectively used for connecting the power supply and the load, the moving contact 21 and the static contact 22 are respectively connected with the incoming line end and the outgoing line end, 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 static contact 22 through the operating mechanism 25, so as to realize the conduction and disconnection of the main circuit of the circuit breaker pole 2; when the circuit breaker pole 2 is an N pole, it usually only comprises an incoming line end, an outgoing line end, a moving contact 21 and a static contact 22, and an operating mechanism 25 for driving the moving contact 21 to contact and separate from the static contact 22, without setting the overload tripping mechanism 23 and the short-circuit tripping mechanism 24; of course, the circuit breaker pole 2 of the N pole can not be set, and only the circuit breaker pole 2 of the phase pole can be set. The leakage protection pole 1 comprises a zero sequence current transformer, an electronic component board and a leakage tripping device 3, the zero sequence current transformer is electrically connected with the electronic component board, and the electronic component board is electrically connected with the leakage tripping device 3, the main circuits of the four circuit breaker poles 2 pass through the zero sequence current transformer respectively, the zero sequence current transformer is used for sensing the leakage current in the main circuit and transmitting the leakage signal to the leakage detection circuit of the electronic component board, the leakage detection circuit is used for processing the leakage signal, and when the leakage signal meets the condition, the leakage tripping device 3 is driven to act, so that the leakage tripping device 3 drives the operating mechanism 25 to trip, the operating mechanism 25 drives the moving contact 21 and the static contact 22 to separate, and the main circuit is disconnected to realize the protection function.

[0039] The operating mechanism 25 comprises a rotating plate 251 and an energy storage spring connected with the rotating plate 251, the rotating plate 251 is respectively provided with a rotatable jump buckle 252 and a lock buckle 253, the jump buckle 252 and the lock buckle 253 are snap-fitted, a connecting rod 254 is arranged between the jump buckle 252 and the handle 26, and the two ends of the connecting rod 254 are respectively rotatably connected with the handle 26 and the jump buckle 252, so that the handle 26 is connected with the jump buckle 252 through the connecting rod 254, when the jump buckle 252 and the lock buckle 253 are snap-fitted, the lock buckle 253 locks the jump buckle 252 and the rotating plate 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 support rotation, when the handle 26 rotates in two opposite directions respectively, the rotating plate 251 can drive the moving contact 21 to contact and separate from the static contact 22, and the rotating plate 251 is compressed by the handle 26 and is locked when the moving contact 21 contacts with the static contact 22.

[0040] The leakage tripping device 3, overload tripping device 23 and short-circuit tripping device 24 respectively trigger the unlocking of the lock 253 from the jumper 252 when the leakage current, short-circuit current and overload current meet the conditions, i.e. drive the operating mechanism 25 to trip, at this time, the handle 26 cannot drive the contact 21 to rotate through the jumper 252, and the handle 26 loses the locking of the rotating plate 251, the energy storage spring is released, the energy storage spring drives the contact 21 to rotate when released, so that the moving contact 21 is separated from the static contact 22, thereby realizing the leakage protection, short-circuit protection and overload protection functions.

[0041] The short-circuit tripping device generally comprises a short-circuit tripping coil and a short-circuit core driven by the short-circuit tripping coil, the short-circuit tripping coil is connected with the static contact 22, when the short-circuit current flowing through the short-circuit tripping coil meets the action condition, the short-circuit tripping coil drives the short-circuit core to move, and the short-circuit core directly or indirectly triggers the unlocking of the lock 253 from the jumper 252.

[0042] The overload tripping device generally comprises a bimetallic strip, the bimetallic strip is connected with the moving contact 21, when the overload current flowing through the bimetallic strip meets the action condition, the bimetallic strip is bent due to temperature rise, thereby directly or indirectly triggering the unlocking of the lock 253 from the jumper 252.

[0043] One improvement of the embodiment is that, as shown in FIGS. 3-4, the leakage protection pole 1 is provided with a leakage power supply contact composed of a moving contact 4 and a static contact 5, and a driving member 6 for driving the moving contact 4 to contact and separate from the static contact 5, the leakage power supply contact composed of the moving contact 4 and the static contact 5 is connected in series in a power supply circuit for supplying power to the electronic component board and / or the leakage tripping device 3, the driving member 6 is connected with the operating mechanism 25 of the circuit breaker pole 2, when the main circuit of the circuit breaker pole 2 is turned on, the driving member 6 drives the moving contact 4 to contact the static contact 5 under the driving of the operating mechanism 25, thereby connecting the power supply circuit; when the main circuit of the circuit breaker pole 2 is turned off, the driving member 6 drives the moving contact 4 to separate from the static contact 5 under the driving of the operating mechanism 25, or the driving member 6 moves away from the moving contact 4 under the driving of the operating mechanism 25, the moving contact 4 is reset to a position separated from the static contact 5, thereby disconnecting the power supply circuit.

[0044] The leakage protection circuit breaker of the embodiment is provided with a leakage power supply contact formed by the movable contact 4 and the fixed contact 5, and the driving member is connected with the operating mechanism 25, and the leakage power supply contact is used to control the power supply of the electronic component board and / or the leakage release 3, and when the operating mechanism 25 drives the leakage protection circuit breaker to close, the leakage power supply contact is closed to supply power to the electronic component board and / or the leakage release 3, and when the leakage protection circuit breaker is opened, the operating mechanism 25 drives the leakage power supply contact to be opened, and the current cannot pass through the electronic component board and / or the leakage release 3, and even if the incoming line end and the outgoing line end of the circuit breaker pole 2 are connected reversely or the high inductive or capacitive load is connected, the leakage release coil and the electronic component board of the leakage release 3 will not be burnt, and the reliability of the circuit breaker can be greatly improved.

[0045] The leakage release 3 is provided with a leakage release coil and a leakage release core 33 driven by the leakage release coil, the electronic component board is provided with a switching element and a leakage detection circuit, the switching element is connected in series in the loop for supplying power to the leakage release 3 from the power supply, and the leakage detection circuit can control the switching element to be closed and opened, and the leakage detection circuit closes the switching element when the leakage current in the main loop of the circuit breaker pole 2 meets the condition. The switching element can be a relay or an electronic switch such as a MOS tube. In one embodiment, the leakage power supply contact is connected to the power supply loop, the electronic component board is connected to the power supply from the power supply through the leakage power supply contact, the loop for supplying power to the electronic component board is used as the power supply loop, and the leakage power supply contact is used to control the power supply loop for supplying power to the electronic component board. Alternatively, the leakage release coil, the switching element and the leakage power supply contact are connected in series to the power supply as the power supply loop, and the leakage power supply contact is used to control the power supply loop for supplying power to the leakage release coil of the leakage release 3. Of course, the leakage power supply contact can also be used to control the power supply loop for supplying power to the electronic component board and the leakage release coil.

[0046] When the handle 26 drives the operating mechanism 25 to close the leakage protection circuit breaker, the leakage power supply contact is closed to supply power to the electronic component board and / or the leakage release 3, the leakage detection circuit triggers the switching element to be closed after detecting the leakage fault, the leakage release coil attracts the leakage release core 33 to act, and when the leakage release core 33 acts, the latch 253 of the circuit breaker pole 2 is triggered to be unlocked to release the catch 252, the operating mechanism 25 drives the movable contact 21 to be separated from the fixed contact 22 and the main loop of the circuit breaker pole 2 to be opened, and at the same time, the operating mechanism 25 of the circuit breaker pole drives the movable contact 4 to be separated from the fixed contact 5 through the driving member 6, and the power supply to the electronic component board and / or the leakage release coil is stopped.

[0047] As shown in Fig. 3:5, the housing of the circuit breaker pole and / or the housing of the leakage protection pole 1 is provided with a sliding slot 60, the driving member 6 is slidingly arranged in the sliding slot 60, the driving member 6 is linearly moved along the length direction of the sliding slot 60 under the drive of the operating mechanism 25, the movable contact 4 comprises an elastic part 41 arranged in the moving direction of the driving member 6, when the circuit breaker pole is closed, the operating mechanism 25 drives the driving member 6 to move downward along the sliding slot 60 and pushes the elastic part 41, so that the elastic part 41 is in contact with the static contact 5, when the circuit breaker pole is opened, or when the operating mechanism 25 is tripped due to failure, the operating mechanism 25 drives the driving member 6 to move upward along the sliding slot 60 and away from the elastic part 41, so that the elastic part 41 is reset to a position separated from the static contact 5. The elastic part 41 can be connected with the driving member 6, so that the elastic part 41 is separated from the static contact 5 under the drive of the driving member 6, or the elastic part 41 is reset to the position separated from the static contact 5 by using the elasticity of the elastic part 41 itself or by using a spring, all of which belong to the protection scope of the present application.

[0048] Further, the side wall of the housing of the circuit breaker pole and the housing of the leakage protection pole 1 which are in close contact with each other is provided with a sliding hole as the sliding slot 60, the driving member 6 is slidingly arranged in the sliding slot 60, and the driving member 6 is linearly moved along the length direction of the sliding slot 60 under the drive of the operating mechanism 25. By arranging the sliding hole as the sliding slot 60 on the side wall of the housing of the circuit breaker pole and the housing of the leakage protection pole 1 which are adjacent to each other, the thickness of the driving member 6 is basically equal to the thickness of the side wall of the housing of the circuit breaker pole and the housing of the leakage protection pole 1 which are adjacent to each other, so that the driving member 6 does not need to occupy or occupies very little internal space of the leakage protection pole 1, and the internal structure of the existing leakage protection pole 1 does not need to be changed too much.

[0049] Further, one side of the sliding slot 60 is provided with a linkage hole 601, the linkage hole 601 is used for passing through a tripping shaft not shown in the figure, one end of the tripping shaft is connected with the operating mechanism 25 of the circuit breaker pole, and the other end of the tripping shaft is pushed by the leakage tripping device 3 when the leakage tripping device 3 is in action, so that the tripping shaft drives the operating mechanism 25 to trip, and the linkage hole 601 is in communication with the sliding hole.

[0050] As shown in Figs. 7-8, the lock 253 comprises a rotating part 256 and a locking part 257 on one side of the rotating part 256, the rotating part 256 is rotatably installed on the rotating plate 251 through the lock rotating shaft 255, the locking part 257 is used for locking the jumper 252, the driving member 6 is provided with a driving hole 61 sleeved on the lock rotating shaft 255, and the lock 253 drives the driving member 6 to move through the lock rotating shaft 255 when the lock 253 rotates with the rotating plate 251. In the embodiment, the lock rotating shaft 255 is used as the driving part for driving the driving member 6 to move, of course, the driving part can be arranged on other positions of the operating mechanism 25, for example, other positions of the rotating plate 251 and the lock 253, all of which belong to the protection scope of the present application.

[0051] Further, the driving member 6 comprises a driving rod 62, a first boss 63 and a second boss 64 arranged at two ends of the driving rod 62 respectively, the first boss 63 and the second boss 64 are arranged oppositely on the driving rod 62 near and away from the circuit breaker pole, the first boss 63 is used for inserting into the circuit breaker pole, a driving hole 61 is arranged on the first boss 63, the second boss 64 is protruded along the width direction of the shell and extends to the side surface of the moving contact 4, a pushing surface 65 is arranged on the second boss 64, the pushing surface 65 is arranged at an oblique angle with the moving direction of the driving member 6, and the elastic part 41 is arranged in parallel with the pushing surface 65 on the driving member when not contacting the static contact 5. Through the parallel arrangement of the pushing surface 65 and the elastic part 41, the driving member can push the moving contact 4, so that the cooperation between the two is smoother, and problems such as jamming are prevented.

[0052] The second boss 64 comprises a first protruding part 641 and a second protruding part 642 connected between the first protruding part 641 and the driving rod 62, the width of the first protruding part 641 is smaller than the width of the second protruding part 642, and the pushing surface 65 is arranged on the first protruding part 641, so that the first protruding part 641 can avoid interference with other parts after reducing the size.

[0053] As shown in FIGS. 1-3, the leakage protection pole 1 of the embodiment comprises a shell composed of a first side plate 11 and a second side plate 12, and a first partition plate 13 and a second partition plate 14 arranged between the first side plate 11 and the second side plate 12, the first side plate 11 is provided with a circuit breaker pole shell of the circuit breaker pole 2 away from the second side plate 12, the first side plate 11 is located between the second side plate 12 and the circuit breaker pole 2, the first partition plate 13 is located between the second partition plate 14 and the first side plate 11, the electronic component board, the zero sequence current transformer and the leakage release 3 are arranged on the first side plate 11 and located between the first side plate 11 and the second side plate 12, the moving contact 4, the static contact 5 and the driving member 6 are arranged on the first side plate 11, the leakage release 3 is located between the first side plate 11 and the second partition plate 14, the first partition plate 13 and the second partition plate 14 are provided with slots corresponding to the electronic component board and the zero sequence current transformer, the arrangement of the first partition plate 13 and the second partition plate 14 can make the materials universal, the embodiment is a 4P circuit breaker product, if a 3P circuit breaker product is used, one of the first partition plate 13 or the second partition plate 14 can be removed, and if a 2P circuit breaker product is used, the first partition plate 13 and the second partition plate 14 can be removed. The first side plate 11 can be independent of the circuit breaker pole shell or integrally formed with the circuit breaker pole shell as a part of the circuit breaker pole shell.

[0054] As shown in Fig. 3, the static contact 5 is fixedly arranged on the first side plate 11, the static contact 5 is connected with the first conductor wire (not shown in the figure), the dynamic contact 4 is connected with the second conductor wire 72, one end of the leakage tripping coil is connected with the second conductor wire 72, the other end of the leakage tripping coil is connected with the third conductor wire (not shown in the figure), and the first conductor wire and the third conductor wire are respectively connected with two ends of the switching element on the electronic component board.

[0055] As shown in Fig. 4, the leakage tripping device 3 is arranged above the electronic component board and the zero sequence current transformer, the leakage tripping device 3 is respectively provided with a test button and an indicating mechanism on opposite sides along the length direction of the shell, the indicating mechanism is used for indicating the state of the leakage tripping device 3, i.e. indicating whether the leakage fault occurs, and the test button is used for closing the test loop to simulate the leakage current signal and testing whether the leakage tripping device 3 can normally act. The first side plate 11 of the leakage protection pole 1 and the side plate of the shell of the circuit breaker pole 2 which is in close contact with the first side plate 11 are provided with the sliding groove 60, the driving member 6 is arranged in the sliding groove 60, the driving member 6 is arranged in the thickness direction of the shell of the leakage protection pole 1 and is stacked with the indicating mechanism, and the dynamic contact 4 and the static contact 5 are arranged below the indicating mechanism.

[0056] As shown in FIG. 3-4, the indicating mechanism 8 includes an indicating button 81, a push plate 82 and an indicating spring not shown in the figure, the indicating button 81 is slidingly arranged, the push plate 82 is rotatably arranged and can lock the indicating button 81, the indicating spring is connected with the indicating button 81, the push plate 82 is pushed by the indicating spring to drive the tripping shaft when the electric leakage release 3 acts, so that the operating mechanism of the circuit breaker pole 2 is tripped, and the push plate 82 releases the lock of the indicating button 81, the indicating spring drives the indicating button 81 to extend out of the shell of the electric leakage protection pole 1, and the electric leakage fault is indicated. The tripping shaft extends into the electric leakage protection pole 1 through the linkage hole 601, one end of the driving member 6 for connecting the operating mechanism 25 is located between the push plate 82 and the first side plate 11, so that the sliding groove 60 can be arranged adjacent to and communicated with the linkage hole 601, and one end of the driving member 6 for pushing the moving contact 4 is located on one side below the push plate 82. By locating one end of the driving member 6 for connecting the operating mechanism 25 between the push plate 82 and the first side plate 11, not only the utilization rate of the space in the shell can be improved, but also the volume can be avoided from being increased, and the driving member 6 is arranged on one side of the tripping shaft, so that the sliding groove 60 can be arranged adjacent to and communicated with the linkage hole 601, the overall structure of the circuit breaker shell is avoided from being greatly changed, and the processing cost is reduced. Specifically, the indicating button 81 includes an indicating part 811 and a limiting part 812, the indicating button 81 can be compressed to move to the first indicating position in the direction of retracting into the shell by pressing the indicating part 811, and the push plate 82 locks the limiting part 812, so that the indicating button 81 is locked at the first indicating position; the electric leakage release 3 pushes the push plate 82 to drive the tripping shaft, so that the operating mechanism of the circuit breaker pole 2 is tripped, and the electric leakage release 3 unlocks the limiting part 812 by driving the push plate 82, the indicating spring drives the indicating button 81 to move, so that the indicating part 811 moves to the second indicating position in the direction of extending out of the shell.

[0057] As shown in FIG. 4, the moving contact 4 and the static contact 5 are arranged below the indicating mechanism 8, the moving contact 4 includes an L-shaped fixed part 42 and an elastic part 41 connected with the fixed part 42, the elastic part 41 is inclined on the side close to the static contact 5, the shell of the electric leakage protection pole 1 is provided with a first limiting groove 101 for limiting the fixed part 42 and a second limiting groove 102 for limiting the static contact 5, the first limiting groove 101 and the second limiting groove 102 are respectively provided with a first wiring port 1011 and a second wiring port 1021 on the sides away from each other, the first wiring port 1011 and the second wiring port 1021 are respectively used for penetrating the second wire 72 and the first wire, so that the second wire 72 and the first wire are respectively connected with the moving contact 4 and the static contact 5.

[0058] As shown in the circuit schematic diagram of Fig. 9, at least one set of leakage power supply contacts is provided, and two sets of leakage power supply contacts are provided in the embodiment, any two groups of power supply phase lines among the A-phase line, the B-phase line and the C-phase line are connected to the moving contact 4 of the two sets of leakage power supply contacts, and the stationary contact 5 of the two sets of leakage power supply contacts is connected to the electronic component board respectively for supplying power to the electronic component board. When three sets of leakage power supply contacts are provided, the A-phase line, the B-phase line and the C-phase line are connected to the moving contact 4 of the three sets of leakage power supply contacts respectively, and the stationary contact 5 of the three sets of leakage power supply contacts is connected to the electronic component board respectively for supplying power to the electronic component board. Of course, one set of leakage power supply contacts can also be provided, which all belong to the protection scope of the present application.

[0059] As another embodiment, the moving contact 4 is arranged on the driving member 6, and the stationary contact 5 is fixedly arranged in the leakage protection pole 1, and the driving member 6 drives the moving contact 4 to separate from the stationary contact 5 under the driving of the operating mechanism 25.

[0060] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in use, and are only for the convenience of description, and cannot be understood as indicating that the device or element must have a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0061] The above is a further detailed description of the present application in combination with specific preferred embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as belonging to the protection scope of the present application.

Claims

1. A leakage protection circuit breaker, comprising a leakage protection pole (1) and at least one circuit breaker pole (2) arranged side by side, the leakage protection pole (1) comprising a zero sequence current transformer, an electronic component board and a leakage release (3), the circuit breaker pole (2) comprising a handle (26), an operating mechanism (25) and a main circuit, the handle (26) driving the main circuit to be on and off through the operating mechanism (25), the leakage release (3) comprising a leakage release coil and a leakage release iron core (33) driven by the leakage release coil, characterized in that: the leakage protection pole (1) is provided with a leakage power supply contact composed of a moving contact (4) and a stationary contact (5), and a driving member (6) for driving the moving contact (4) to contact and separate from the stationary contact (5), the leakage power supply contact composed of the moving contact (4) and the stationary contact (5) is connected in series in a power supply circuit for supplying power to the electronic component board and / or the leakage release (3), and the driving member (6) is connected with the operating mechanism (25) of the circuit breaker pole (2), when the main circuit of the circuit breaker pole (2) is on, the driving member (6) is driven by the operating mechanism (25) to drive the moving contact (4) to contact with the stationary contact (5), and the power supply circuit is turned on; when the main circuit of the circuit breaker pole (2) is off, the driving member (6) is driven by the operating mechanism (25) to drive the moving contact (4) to separate from the stationary contact (5), or the driving member (6) is driven by the operating mechanism (25) to move away from the moving contact (4), the moving contact (4) is reset to a position separated from the stationary contact (5), and the power supply circuit is turned off. a sliding groove (60) is arranged on the housing of the circuit breaker pole and / or the housing of the leakage protection pole (1), the driving member (6) is slidingly arranged in the sliding groove (60), and the driving member (6) moves linearly along the length direction of the sliding groove (60) under the driving of the operating mechanism (25).

2. The arc fault circuit interrupter of claim 1, wherein: a sliding hole as the sliding groove (60) is arranged on the side wall of the housing of the circuit breaker pole and the housing of the leakage protection pole (1) which are in close contact with each other, the driving member (6) is slidingly arranged in the sliding groove (60), and the driving member (6) moves linearly along the length direction of the sliding groove (60) under the driving of the operating mechanism (25).

3. The arc fault circuit interrupter of claim 1, wherein: the moving contact (4) comprises a resilient portion (41) arranged in the moving direction of the driving member (6), the operating mechanism (25) drives the driving member (6) to move along the sliding groove (60) and push the resilient portion (41) when the circuit breaker pole is closed, so that the resilient portion (41) contacts with the stationary contact (5), and the operating mechanism (25) drives the driving member (6) to move along the sliding groove (60) and away from the resilient portion (41) when the circuit breaker pole (2) is opened or the operating mechanism (25) is tripped due to a fault.

4. The arc fault circuit interrupter of claim 2 or 3, wherein: one side of the sliding groove (60) is provided with a linkage hole (601) for passing through a tripping shaft, one end of the tripping shaft is connected with the operating mechanism (25) of the circuit breaker pole (2), and the other end of the tripping shaft is pushed by the leakage release (3) when it is in action, so that the tripping shaft drives the operating mechanism (25) to trip, and the linkage hole (601) is communicated with the sliding hole.

5. The arc fault circuit interrupter of claim 3, wherein: ​ 6. The arc fault circuit interrupter of claim 1, wherein: The operating mechanism (25) comprises a rotating plate (251) and a jump buckle (252) and a lock buckle (253) rotatably arranged on the rotating plate (251) respectively, the jump buckle (252) is connected with the handle (26) through a connecting rod (254), the lock buckle (253) is used for locking the jump buckle (252) and the rotating plate (251), so that the handle (26) can drive the contact (21) to rotate by the jump buckle (252), the main circuit comprises the movable contact (21) and the static contact (22), the movable contact (21) is arranged on the rotating plate (251), and the rotating plate (251) drives the movable contact (21) to contact and separate from the static contact (22) when rotating, so as to respectively turn on and turn off the main circuit.

7. The arc fault circuit interrupter of claim 6, wherein: The lock buckle (253) comprises a rotating part (256) and a locking part (257) on one side of the rotating part (256), the rotating part (256) is rotatably installed on the rotating plate (251) through a lock buckle rotating shaft (255), the locking part (257) is used for locking the jump buckle (252), the driving member (6) is provided with a driving hole (61) sleeved on the lock buckle rotating shaft (255), and the lock buckle (253) drives the driving member (6) to move through the lock buckle rotating shaft (255) when rotating with the rotating plate (251).

8. The arc fault circuit interrupter of claim 1, wherein: The driving member (6) comprises a driving rod (62) and first and second bosses (63) and (64) arranged at two ends of the driving rod (62) respectively, the first and second bosses (63) and (64) are oppositely arranged on the two sides of the driving rod (62) close to and away from the circuit breaker pole (2), the first boss (63) is used for being inserted into the circuit breaker pole (2), the driving hole (61) is arranged on the first boss (63), and the second boss (64) protrudes along the width direction of the shell and extends to the side surface of the movable contact (4).

9. The arc fault circuit interrupter of claim 8, wherein: The second boss (64) is provided with a pushing surface (65), the pushing surface (65) is arranged at an oblique angle with the moving direction of the driving member (6), and the movable contact (4) comprises an elastic part (41) arranged in the moving direction of the driving member (6), the elastic part (41) is arranged in parallel with the pushing surface (65) on the driving member when not contacting the static contact (5).

10. The arc fault circuit interrupter of claim 9, wherein: The second boss (64) comprises a first protruding part (641) and a second protruding part (642) connected between the first protruding part (641) and the driving rod (62), the width of the first protruding part (641) is smaller than that of the second protruding part (642), and the pushing surface (65) is arranged on the first protruding part (641).

11. The arc fault circuit interrupter of claim 4, wherein: The movable contact (4) comprises a fixed part (42) and an elastic part (41) connected with the fixed part (42), the fixed part (42) is fixedly arranged and connected to the power supply circuit, the housing of the leakage protection pole (1) is provided with a first limiting groove (101) for limiting the fixed part (42) and a second limiting groove (102) for limiting the static contact (5), the elastic part (41) is inclined on the side close to the static contact (5), and the driving part (6) is located on the side of the elastic part (41) away from the static contact (5), and the driving part (6) is used for bending the elastic part (41) of the movable contact (4) towards the static contact (5) and contacting the static contact (5).

12. The arc fault circuit interrupter of claim 11, wherein: The static contact (5) is connected with a first wire, the movable contact (4) is connected with a second wire (72), the second wire (72) is used for connecting one end of the leakage tripping coil, the other end of the leakage tripping coil is connected with a third wire, and the first wire and the third wire are respectively connected with an electronic component board; the first limiting groove (101) and the second limiting groove (102) are respectively provided with a first wiring port (1011) and a second wiring port (1021) on the sides away from each other, and the first wiring port (1011) and the second wiring port (1021) are respectively used for penetrating the second wire (72) and the first wire, so that the second wire (72) and the first wire are respectively connected with the movable contact (4) and the static contact (5).

13. The arc fault circuit interrupter of claim 5, wherein: The leakage protection pole (1) further comprises an indication mechanism (8) matched with the leakage tripping device (3), the indication mechanism (8) comprises an indication button (81), a push plate (82) and an indication spring, the indication button (81) is slidingly arranged, the indication spring is connected with the indication button (81), the indication button (81) comprises an indication part (811) and a limiting part (812), and pressing the indication part (811) can make the indication button (81) compress the indication spring to move to a first indication position in the direction of retracting the housing, and at the same time, the push plate (82) locks the limiting part (812), so that the indication button (81) is locked in the first indication position; when the leakage tripping device (3) acts, the push plate (82) drives the tripping shaft, so that the operating mechanism of the circuit breaker pole (2) is tripped, at the same time, the push plate (82) unlocks the limiting part (812), the indication spring drives the indication button (81) to move, and the indication part (811) moves to a second indication position in the direction of extending out of the housing.

14. The arc fault circuit interrupter of claim 13, wherein: The leakage protection pole (1) further comprises a test button and a test circuit, the test button is used for closing the test circuit to simulate a leakage current signal, and the test button and the indication mechanism are respectively arranged on opposite sides of the leakage tripping device (3) along the length direction of the housing of the leakage protection pole (1).

15. The arc fault circuit interrupter of claim 13, wherein: The movable contact (4) is arranged on the driving part (6), and the static contact (5) is fixedly arranged in the leakage protection pole (1).

Images