Circuit breaker

Abstract

The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker, a main loop of which comprises an operating piece, an operating mechanism in transmission fit with the operating piece, a contact system and an arc extinguishing system matched with the contact system, and the operating mechanism comprises a locking piece and a tripping piece which are in hasp fit. The contact system comprises a moving contact and a static contact which are in transmission connection with the operating mechanism; a sampling device is coupled with a contact system, a control system is at least used for controlling a tripping system to act when short-circuit current and / or overload current flows through the contact system, and the tripping system acts to be used for releasing hasp matching of a tripping fastener and a locking fastener so as to drive a circuit breaker to be opened; the circuit breaker is suitable for various current protection threshold requirements.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly to a circuit breaker. Background Art

[0002] For existing circuit breakers, especially intelligent circuit breakers, the short-circuit protection function and overload protection function are realized by separately arranged electromagnetic tripping devices and bimetal strips. The bimetal strip and the electromagnetic tripping device are connected in series with the contact system of the circuit breaker. The current-carrying capacity or protection characteristics are fixed, and they cannot be applied to different current specifications at the same time, and it also leads to a complex internal structure and large occupied space of the circuit breaker. In addition, existing circuit breakers, especially intelligent circuit breakers, lack structures to prevent the circuit breaker from being pulled out of the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electrical cabinets) when in the closed state and from being installed into the circuit breaker installation cabinet when in the closed state. Content of the Utility Model

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a circuit breaker that is applicable to various current protection threshold requirements.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A circuit breaker includes a housing and a main circuit. The main circuit includes an operating member slidably arranged on the housing, and an operating mechanism, a contact system, and an arc extinguishing system that cooperate with the contact system, all of which are arranged inside the housing. The operating mechanism is in transmission cooperation with the operating member and includes a locking member and a tripping member that are latched together. The contact system includes a moving contact and a static contact that are in transmission connection with the operating mechanism.

[0006] The circuit breaker further includes a control system, a tripping system, and a sampling device that are respectively connected to the control system. The sampling device is coupled with the contact system. The control system is at least used to control the tripping system to act when a short-circuit current and / or an overload current flows through the contact system. The action of the tripping system is used to release the latching cooperation between the tripping member and the locking member and drive the circuit breaker to trip.

[0007] Further, the sampling device includes a manganin shunt connected in series with the contact system; alternatively, the sampling device includes a current transformer coupled with the contact system.

[0008] Further, in the length direction of the circuit breaker, the operating member is arranged at one end of the housing, the tripping system and the operating mechanism are arranged in the middle of the housing, and the arc extinguishing system and the sampling device are arranged at the other end of the housing. The arc extinguishing system and the sampling device are arranged side by side along the height direction of the circuit breaker. The control system includes a circuit board, and the circuit board is stacked with the operating mechanism along the width direction of the circuit breaker.

[0009] Further, the operating mechanism further includes a connecting rod, a transmission member, and a lever assembly that are respectively rotatably disposed on the housing. The lever assembly includes a rotating plate rotatably disposed on the housing, and a locking member and a tripping member that are respectively rotatably disposed on the rotating plate. The operating member is in transmission cooperation with the transmission member. The transmission member is in transmission connection with the locking member through the connecting rod. The rotating plate is in transmission connection with the moving contact.

[0010] The operating member, the transmission member, the connecting rod, the lever assembly, and the sampling device are sequentially arranged along the length direction of the circuit breaker. The tripping system and the transmission member are arranged side by side along the height direction of the circuit breaker.

[0011] Further, the circuit breaker further includes a transmission rod. The operating member is in transmission connection with the transmission member through the transmission rod.

[0012] Further, the tripping system is a direct-acting electromagnetic tripping device, and the ejector rod of the tripping system is movably arranged along the height direction of the circuit breaker.

[0013] Further, the main circuit further includes a first terminal and a second terminal, and the contact system is connected in series between the first terminal and the second terminal.

[0014] Further, the second terminal and the operating member are arranged side by side along the height direction of the circuit breaker. In the length direction of the circuit breaker, the operating member and the second terminal are arranged at one end of the housing, and the first terminal is arranged at the other end of the housing. The operating mechanism, the tripping system, the sampling device, and the arc extinguishing system are located between the operating member and the first terminal.

[0015] Further, in the height direction of the circuit breaker, the second terminal, the tripping system, and the arc extinguishing system are arranged at one end of the housing, and the operating member, the operating mechanism, the sampling device, and the first terminal are arranged at the other end of the housing.

[0016] Further, the main circuit further includes a connecting conductor. The static contact is electrically connected to the second terminal through the connecting conductor. The connecting conductor and the circuit board are arranged side by side along the width direction of the circuit breaker.

[0017] Further, the connecting conductor is a connecting conductive plate. The control system further includes a first sampling terminal disposed on the circuit board and connected thereto. The connecting conductive plate is plugged and electrically connected to the first sampling terminal. The connecting conductive plate and the first sampling terminal are located on the same side of the circuit board in the width direction of the circuit breaker.

[0018] Further, at least a part of the connecting conductor is arranged side by side with the tripping system along the length direction of the circuit breaker and this part is plugged and electrically connected to the first sampling terminal. The first sampling terminal is arranged side by side with the tripping system along the length direction of the circuit breaker and is located between the tripping system and the arc extinguishing system. The first sampling terminal is arranged side by side with the operating mechanism along the height direction of the circuit breaker.

[0019] Further, the circuit breaker further includes a secondary circuit, the secondary circuit being a direct-through circuit and including a third terminal, a direct-through conductor, and a fourth terminal connected in series in sequence.

[0020] Further, the third terminal and the first terminal are arranged side by side along the height direction of the circuit breaker, the fourth terminal and the second terminal are arranged side by side along the width direction of the circuit breaker and the fourth terminal and the operating member are arranged side by side along the height direction of the circuit breaker, and the direct-through conductor and the main circuit are arranged side by side along the height direction of the circuit breaker.

[0021] Further, the control system further includes a second sampling terminal arranged on and connected to the circuit board; the direct-through conductor is a direct-through conductive plate, at least part of the direct-through conductive plate is arranged side by side with the circuit board along the width direction of the circuit breaker and is inserted and electrically connected to the second sampling terminal; at least part of the direct-through conductive plate and the second sampling terminal are located on the same side of the circuit board.

[0022] Further, the second sampling terminal and the tripping system are arranged side by side along the length direction of the circuit breaker and are located between the tripping system and the arc extinguishing system, and the second sampling terminal and the operating mechanism are arranged side by side along the height direction of the circuit breaker.

[0023] Further, in the length direction of the circuit breaker, the first terminal and the second terminal are arranged at one end of the circuit breaker, and the operating member is arranged at the other end of the circuit breaker.

[0024] Further, the circuit breaker further includes a first locking mechanism, the first locking mechanism including a first locking member slidably arranged in the housing and a first locking member return spring, the first locking member return spring acting on the first locking member to give it a tendency to move outward from the housing and causing the first locking member protrusion of the first locking member to protrude outside the housing, and the first locking member being driven to move inward into the housing when the first locking member protrusion is externally squeezed; the first locking member is driven to move inward into the housing by the operating member pulled at the opening position.

[0025] Further, the circuit breaker further includes a second locking mechanism, the second locking mechanism including a second locking member rotatably arranged in the housing; when the operating member moves from the opening position to the closing position, the second locking member is driven by the operating member to rotate forward so that the second locking protrusion of the second locking member moves outward from the housing; when the operating member moves from the closing position to the opening position, the second locking member rotates reversely so that the second locking protrusion moves inward into the housing; when the operating member is in the closing position, the second locking member is restricted by the operating member and cannot rotate reversely.

[0026] Further, when the operating member moves from the closing position to the opening position, the second locking member is driven by the operating member to rotate reversely.

[0027] Furthermore, the second locking member is driven by the operating member pulled in the opening position to rotate reversely, and the first locking member is driven by the reversely rotating second locking member to move towards the interior of the housing.

[0028] Furthermore, the length direction, width direction, and height direction of the housing are the same as those of the circuit breaker; the length of the housing is 100 - 150 mm, the width is 10 - 60 mm, and the height is 38 - 45 mm.

[0029] Furthermore, the width of the housing is 10 mm, 15 mm, 20 mm, 30 mm, or 60 mm.

[0030] For the circuit breaker of the present utility model, its control system and tripping system cooperate to achieve short - circuit and / or overload protection functions. Compared with existing circuit breakers, it can meet the requirements of various protection current thresholds, and the operation is more accurate, and the protection effect is better.

[0031] In addition, the control system and the tripping system cooperate to achieve short - circuit and overload protection functions. Compared with existing circuit breakers, there is no need to separately set an electromagnetic tripping device for short - circuit protection and a bimetallic strip for overload protection, which is beneficial to simplifying the internal structure of the circuit breaker, facilitating the internal layout design of the circuit breaker, and conducive to the miniaturization of the circuit breaker; moreover, the control system and the tripping system cooperate to meet the protection requirements (different current protection thresholds) of circuit breakers of different specifications, and only need to adjust the corresponding parameters according to the protection requirements; and for the circuit breaker of the present utility model, its internal layout is reasonable and compact, which is conducive to the miniaturization of the circuit breaker.

[0032] In addition, for the circuit breaker of the present utility model, the tripping system that occupies a large space and the transmission member that occupies a small space are arranged side by side, which is beneficial to further improving the compactness of the internal layout of the circuit breaker.

[0033] In addition, the first locking member prevents the circuit breaker from being pulled out of the circuit breaker installation cabinet in the closed state, ensuring the personal safety of the operator, and ensuring the safety, electricity consumption, and continuity of electricity use.

[0034] In addition, the second locking member prevents the circuit breaker from being installed into the circuit breaker installation cabinet in the closed state, ensuring the personal safety of the operator and avoiding electric shock accidents during the installation of the circuit breaker.

[0035] In addition, the operating member drives the first locking member to move towards the interior of the housing through the second locking member, so there is no need to additionally set a structure for driving the first locking member to move towards the interior of the housing, which is beneficial to reducing the number of components of the circuit breaker and improving the compactness of the internal layout of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the circuit breaker of the present utility model.

[0037] Description of the reference numerals in the drawings

[0038] Housing h;

[0039] Operating member 1;

[0040] Drive rod 1c;

[0041] Operating mechanism 2, lever assembly 2l, transmission member 2-0, connecting rod 2-1, rotating plate 2-2, locking member 2-3, tripping member 2-4;

[0042] Tripping system 3;

[0043] Sampling device 4;

[0044] Control system 5, circuit board 5-0, first sampling terminal 5-1, second sampling terminal 5-2;

[0045] Arc extinguishing system 6;

[0046] First terminal 7-0, second terminal 7-1;

[0047] Moving contact 8-0, static contact 8-1, connecting conductor 8-2;

[0048] Third terminal 9-0, through conductor 9-2;

[0049] Signal terminal 10;

[0050] First locking member 11;

[0051] Second locking member 12;

[0052] Indicator i. Detailed implementation manners

[0053] The following embodiments given in conjunction with the drawings further illustrate the detailed implementation manners of the circuit breaker of the present utility model. The circuit breaker of the present utility model is not limited to the descriptions of the following embodiments.

[0054] As Figure 1 shown, it is an embodiment of the circuit breaker of the present utility model.

[0055] The circuit breaker of this embodiment is preferably a plug-in circuit breaker, which includes a housing h and a main circuit. The main circuit includes an operating member 1 slidably disposed on the housing h, an operating mechanism 2, a contact system 8, and an arc extinguishing system 6 disposed in the housing h and cooperating with the contact system 8 to extinguish the arc generated thereby; the operating member 1 is in driving cooperation with the operating mechanism 2. The contact system 8 includes a moving contact 8-0 and a static contact 8-1 that are used in cooperation. The operating mechanism 2 is in driving connection with the moving contact 8-0. Further, one end of the operating member 1 protrudes outside the housing h for operation (pressed or pulled by an external force), and the other end is in driving cooperation with the operating mechanism 2. The operating member 1 has a tripping position and a closing position and switches between the tripping position and the closing position by sliding.

[0056] In the circuit breaker of this embodiment, when an external force presses the operating member 1 to move it inward into the housing h and reach the closing position, the operating member 1 drives the moving contact 8-0 to close with the static contact 8-1 through the operating mechanism 2, that is, the circuit breaker is closed; when an external force pulls the operating member 1 to move it outward from the housing h and reach the tripping position, the operating member 1 drives the moving contact 8-0 to disconnect from the static contact 8-1 through the operating mechanism 2, that is, the circuit breaker is tripped.

[0057] As other embodiments, after the circuit breaker is closed by pressing the operating member 1 through the operating mechanism 2 with an external force, the operating member 1 is pressed again to trip the circuit breaker through the operating mechanism 2; this operation mode can be realized by the prior art and will not be described in detail here.

[0058] In the circuit breaker of this embodiment, the operating mechanism 2 includes a locking member 2-3 and a tripping member 2-4 that are latched; when the circuit breaker of this embodiment is normally tripped and closed (for example, tripped and closed through the operating member 1), the locking member 2-3 and the tripping member 2-4 remain latched. The operating mechanism 2 is realized by the prior art. For example, the operating mechanism 2 includes a connecting rod 2-1, a transmission member 2-0 and a lever assembly 2l that are respectively rotatably disposed on the housing h. The lever assembly 2l includes a rotating plate 2-2 rotatably disposed on the housing h and a locking member 2-3 and a tripping member 2-4 that are respectively rotatably disposed on the rotating plate 2-2; the operating member 1 is in driving cooperation with the transmission member 2-0 to drive it to rotate. The transmission member 2-0 is in driving connection with the locking member 2-3 through the connecting rod 2-1, and the rotating plate 2-2 is in driving connection with the moving contact 8-0. Further, the moving contact 8-0 rotates under the drive of the rotating plate 2-2 to close and disconnect from the static contact 8-1.

[0059] Further, in the circuit breaker of this embodiment, the main circuit further includes a transmission rod 1c, and the operating member 1 is in driving connection with the transmission member 2-0 through the transmission rod 1c. Specifically, both ends of the transmission rod 1c are respectively rotatably connected to the operating member 1 and the transmission member 2-0.

[0060] The circuit breaker of this embodiment further includes a control system 5, a tripping system 3, and a sampling device 4 that are respectively connected to the control system 5. The sampling device 4 is coupled to the contact system 8. The control system 5 is at least configured to control the tripping system 3 to operate when a short-circuit current and / or an overload current flows through the contact system 8. The operation of the tripping system 3 is used to release the latching fit between the tripping member 2-4 and the latching member 2-3 and drive the circuit breaker to trip. Further, the tripping system 3 is a direct-acting electromagnetic release, such as a shunt release. The ejector rod of the electromagnetic release drives the tripping member 2-4 to release the latching fit with the latching member 2-3 and drive the circuit breaker to trip. Specifically, when the control system 5 detects through the sampling device 4 that a short-circuit current and / or an overload current flows through the contact system 8, the control system 5 controls the tripping system 3 to operate. The ejector rod of the tripping system 3 drives (such as driving in a pressing manner) the tripping member 2-4 to rotate and release the latching fit with the latching member 2-3, and the operating mechanism trips, causing the circuit breaker to trip. Further, the control system 5 is at least configured to control the tripping system 3 to operate when a short-circuit current and an overload current flow through the contact system 8. Further, when the control system 5 detects an overvoltage and / or undervoltage fault through the sampling device 4, it controls the tripping system 3 to operate. The operation of the tripping system 3 is used to drive the tripping member 2-4 to release the latching fit with the latching member 2-3 and drive the circuit breaker to trip.

[0061] For the circuit breaker of this embodiment, its control system 5 and tripping system 3 cooperate to achieve the short-circuit and / or overload protection functions. Compared with existing circuit breakers, it can meet the requirements of various protection current thresholds, and the operation is more accurate and the protection effect is better. Further, the control system 5 and the tripping system 3 cooperate to achieve both the short-circuit protection function and the overload protection function. Compared with existing circuit breakers, there is no need to separately set an electromagnetic release for the short-circuit protection function and a bimetallic strip for the overload protection function, which is beneficial to simplifying the internal structure of the circuit breaker, facilitating the internal layout design of the circuit breaker, and facilitating the miniaturization of the circuit breaker. Moreover, the cooperation of the control system 5 and the tripping system 3 can meet the protection requirements of different specifications of circuit breakers, and only need to adjust the corresponding parameters according to the protection requirements.

[0062] As another embodiment, the tripping system 3 can also be a clapper-type electromagnetic release. The clapper-type electromagnetic release includes an armature and a yoke that are used in cooperation. The armature is in transmission cooperation with the tripping member 2-4. When the control system 5 detects through the sampling device 4 that a short-circuit current and an overload current flow through the contact system 8, the control system 5 controls the tripping system 3 to operate. The armature of the tripping system 3 drives the tripping member 2-4 to rotate and release the latching fit with the latching member 2-3. Further, the connecting conductor 8-2 of the main circuit is located between the armature and the yoke, and the electromagnetic field generated by the connecting conductor 8-2 is used to attract the armature to act through the yoke.

[0063] It should be noted that the "electromagnetic release" refers to a release that generally includes an electromagnetic coil and a driving member (such as a push rod, armature, etc.) driven by the electromagnetic coil. The magnetic field generated by the energization of the electromagnetic coil drives the driving member to act; rather than a release that is only used to achieve short-circuit protection of a circuit breaker in a narrow sense.

[0064] Furthermore, the arc extinguishing system 6 includes an arc extinguishing chamber.

[0065] In the circuit breaker of this embodiment, the main circuit further includes a first terminal 7-0 and a second terminal 7-1. The contact system 8 is connected in series between the first terminal 7-0 and the second terminal 7-1, that is, the first terminal 7-0, the contact system 8, and the second terminal 7-1 are connected in series in sequence. Specifically, the first terminal 7-0 is the incoming line terminal of the main circuit, and the second terminal 7-1 is the outgoing line terminal of the main circuit. Both are electrically connected to the corresponding external conductors in a plug-in manner.

[0066] Furthermore, the main circuit further includes a connecting conductor 8-2. The static contact 8-1 is electrically connected to the second terminal 7-1 through the connecting conductor 8-2. Specifically, the connecting conductor 8-2 is a connecting conductive plate; the control system 5 further includes a first sampling terminal 5-1 connected to the circuit board 5-0, and the connecting conductive plate is electrically connected to the first sampling terminal 5-1. Furthermore, the connecting conductive plate and the static contact 8-1 are of an integral structure.

[0067] In the circuit breaker of this embodiment, the sampling device 4 includes a manganin shunt, which is connected in series with the contact system 8. Furthermore, the first terminal 7-0, the manganin shunt, the contact system 8, and the second terminal 7-1 are connected in series in sequence. Furthermore, the first terminal 7-0, the manganin shunt, the moving contact 8-0, the static contact 8-1, and the second terminal 7-1 are connected in series in sequence. Furthermore, the sampling device 4 further includes a sampling mechanism for collecting voltage signals and coupled to the contact system 8, such as a voltage transformer.

[0068] As other embodiments, the sampling device 4 includes a current transformer, which is coupled to the contact system 8. Specifically, the first terminal 7-0 is connected in series with the contact system 8 through a sampling conductor, and the sampling conductor passes through the middle of the current transformer. Furthermore, the sampling device 4 further includes a voltage transformer, and the voltage transformer is coupled to the contact system 8. Specifically, the sampling conductor passes through the middle of the voltage transformer.

[0069] Furthermore, the main circuit further includes a signal terminal 10 connected to the circuit board 5-0. The signal terminal 10 is used to receive external signals (such as a tripping control signal, etc.) and / or transmit data outward (such as the operating state data of the circuit breaker - current, voltage, and tripping / closing state, etc.).

[0070] The circuit breaker of this embodiment further includes a secondary circuit, which is a direct-through circuit and includes a third terminal 9-0, a direct-through conductor 9-2, and a fourth terminal connected in series in sequence. The "direct-through circuit" refers to a circuit without breakpoints. The third terminal 9-0 and the fourth terminal are respectively connected to an external circuit, and the direct-through circuit can conduct electricity directly. Specifically, the third terminal 9-0 and the fourth terminal are respectively the incoming line terminal and the outgoing line terminal of the secondary circuit.

[0071] It should be noted that the circuit breaker of this embodiment can be provided with only the main circuit, and then the circuit breaker of this embodiment is a single-phase circuit breaker (1p type circuit breaker); or, the circuit breaker of this embodiment can be provided with both the main circuit and the secondary circuit, and then the circuit breaker of this embodiment is a two-phase circuit breaker (1p+1n type circuit breaker).

[0072] Furthermore, the control system 5 further includes a second sampling terminal 5-2 connected to the circuit board 5-0, and the second sampling terminal 5-2 is electrically connected to the direct-through conductor 9-2. Further, the direct-through conductor 9-2 is a direct-through conductive plate, and the direct-through conductive plate is plugged and electrically connected to the second sampling terminal 5-2.

[0073] The circuit breaker of this embodiment further includes an indicator i for the on-off state of the circuit breaker. Further, the indicator i is rotatably arranged in the middle of the operating member 1. The indicator i switches between the on-state indicating position and the off-state indicating position as the operating member 1 switches between the on position and the off position. That is, when the operating member 1 moves to the on position, the indicator i is driven (for example, driven by the structure of the housing h) to rotate to the on-state indicating position; when the operating member 1 moves to the off position, the indicator i is driven (for example, driven by the structure of the housing h) to rotate to the off-state indicating position; the operating member 1 is provided with an indicating hole that cooperates with the indicator i. The installation relationship between the indicator i and the operating member 1 and the transmission relationship between the indicator i and the housing h can all be realized by the prior art and will not be elaborated here.

[0074] The circuit breaker of this embodiment further includes a first locking mechanism, which includes a first locking member 11 and a first locking member return spring interactively arranged in the housing h. The first locking member return spring acts on the first locking member 11 to make it tend to move outside the housing h and make the first locking member protrusion of the first locking member 11 protrude outside the housing h. When the first locking member protrusion is externally squeezed, it drives the first locking member 11 to move inside the housing h (that is, when the first locking member protrusion is externally squeezed, the entire first locking member 11 moves inside the housing h under the drive of the first locking member protrusion); the first locking member 11 is driven by the operating member 1 that is pulled out in the off position to move inside the housing h. That is, when the circuit breaker is in the off state, the operating member 1 is pulled in the off position to drive the first locking member 11 to move inside the housing h.

[0075] In actual use, when the circuit breaker of this embodiment is installed in a circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet, or other electrical cabinets), the first locking protrusion is pushed inward into the housing h due to the structure of the circuit breaker installation cabinet, which will not affect the installation of the circuit breaker in the designated position of the circuit breaker installation cabinet. After the circuit breaker is installed in the designated position and in place, the first locking protrusion will align with the first locking hole provided at the designated position of the circuit breaker installation cabinet and move outward from the housing h and insert into the first locking hole, thereby limiting and cooperating with the circuit breaker installation cabinet, so that the circuit breaker cannot be pulled out from the designated position of the circuit breaker installation cabinet in the closed state, which not only ensures the personal safety of the operator, but also ensures the reliability and stability of power use.

[0076] Furthermore, the circuit breaker of this embodiment further includes an unlocking device. When the operating member 1 is pulled in the open position, the first locking member 11 is driven to move inward into the housing h through the unlocking device. Specifically, the unlocking device is an unlocking rod. The middle of the unlocking rod abuts against the housing h and can rotate with the housing h as a fulcrum. The two ends of the unlocking rod are respectively in transmission cooperation with the operating member 1 and the first locking member 11. In the open state of the circuit breaker of this embodiment, the operating member 1 is in the open position. When the operating member 1 is pulled, the unlocking rod is driven to rotate. When the unlocking rod rotates, the first locking member 11 is driven to move inward into the housing h.

[0077] The circuit breaker of this embodiment further includes a second locking mechanism. The second locking mechanism includes a second locking member 12 rotatably provided in the housing h. When the operating member 1 moves from the open position to the closed position, the second locking member 12 is driven by the operating member 1 to rotate forward, so that the second locking protrusion of the second locking member 12 moves outward from the housing h. That is, during the process of the operating member 1 moving from the open position to the closed position, the second locking member 12 is simultaneously driven to rotate forward, and the second locking protrusion moves outward from the housing h. When the operating member 1 moves from the closed position to the open position, the second locking member 12 rotates reversely, and the second locking protrusion moves inward into the housing h. The second locking member 12 can either rotate reversely under the drive of the operating member 1 or be driven to rotate reversely by other structures (such as the second locking member return spring) other than the operating member 1. When the operating member 1 is in the closed position, the second locking member 12 is restricted by the operating member 1 and cannot rotate reversely, that is, the second locking protrusion of the second locking member 12 is kept protruding outside the housing h. Further, the second locking protrusion is a square protrusion, so that when the operating member 1 is in the closed position (that is, the circuit breaker of this embodiment is in the closed state), the second locking protrusion is forcibly squeezed by the structure of the circuit breaker installation cabinet, causing damage or deformation of the second locking member 12, and the situation where the circuit breaker is directly installed in the circuit breaker installation cabinet occurs.

[0078] For the circuit breaker of this embodiment, its second locking member 12, when the operating member 1 moves from the opening position to the closing position, is driven by the operating member 1 to rotate forward, causing the second locking protrusion to move outward from the housing h. The second locking protrusion is used for structural limit cooperation with the circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet, or other electrical cabinets), thereby preventing the circuit breaker of this embodiment from being installed in the circuit breaker installation cabinet in the closed state and ensuring the personal safety of the operator. After the circuit breaker of this embodiment is installed in the circuit breaker installation cabinet in the open state and is in place, the second locking protrusion protruding outside the housing h is also used to face and extend into the second locking hole of the circuit breaker installation cabinet. The second locking protrusion is in structural limit cooperation with the circuit breaker installation cabinet. When the operating member 1 is in the closing position, the operating member restricts the reverse rotation of the second locking member 12, thereby preventing the circuit breaker of this embodiment from being pulled out of the circuit breaker installation cabinet in the closed state, ensuring both the personal safety of the operator and the stability and reliability of power consumption. When the operating member 1 moves from the closing position to the opening position, the second locking member 12 rotates reversely, causing the second locking protrusion to move inward into the housing h, and the second locking protrusion withdraws from the second locking hole, thereby releasing the limit cooperation with the circuit breaker installation cabinet, so that the second locking member will not affect the removal of the circuit breaker of this embodiment from the circuit breaker installation cabinet.

[0079] In the circuit breaker of this embodiment, when the operating member 1 moves from the closing position to the opening position, the second locking member 12 is driven by the operating member 1 to rotate reversely, causing the second locking protrusion to move inward into the housing h.

[0080] Specifically, the middle of the second locking member 12 is rotatably arranged on the housing h. One end is provided with a second locking protrusion and this end is the locking end, and the other end is in transmission cooperation with the operating member 1 and this end is the cooperation end. Further, the second locking member 12 also serves as an unlocking device. Further, in the open state of the circuit breaker of this embodiment, when the operating member 1 is in the opening position, the operating member 1 is pulled and drives the second locking member 12 to rotate reversely through the cooperation end, and the locking end drives the first locking member 11 to move inward into the housing h. Further, the first locking member 11 includes an unlocking portion that is in transmission cooperation with the unlocking end of the second locking member 12. In the open state of the circuit breaker of this embodiment, when the operating member 1 is in the opening position, the operating member 1 is pulled and drives the second locking member 12 to rotate reversely through the cooperation end, and the second locking member 12 drives the first locking member 14 to move inward into the housing h by pressing against the cooperation portion through the locking end.

[0081] As another embodiment, the circuit breaker of this embodiment includes a second locking member return spring that acts on the second locking member 12 to make it have a tendency to rotate reversely. When the operating member 1 moves from the closing position to the opening position, the operating member 1 no longer restricts the reverse rotation of the second locking member 12, and the acting force of the second locking member return spring drives the second locking member 15 to rotate reversely.

[0082] It should be noted that the circuit breaker of this embodiment may be provided with only the first locking member 11 or the second locking member 12; when the circuit breaker of this embodiment is provided with only the first locking member, an unlocking device is also provided. The circuit breaker of this embodiment may also be provided with both the first locking member 11 and the second locking member 12 at the same time. At this time, the circuit breaker of this embodiment does not provide an unlocking device independent of the first locking member 11 and the second locking member 12, but uses the second locking member 12 as the unlocking device.

[0083] Furthermore, the length direction, width direction, and height direction of the housing h are the same as the length direction, width direction, and height direction of the circuit breaker; the length of the housing h is 100 - 150 mm, the width is 10 - 60 mm, and the height is 38 - 45 mm. The dimension of the height of the housing h is the modular dimension of the circuit breaker of the present invention. Further, the width is 10, 15, 20, 25, 30, 60 mm. Further, for the circuit breaker of this embodiment, when the width of its housing h is 10 mm, the rated current ≤ 32 A; for the circuit breaker of this embodiment, when the width of its housing h is 15, 20, or 25 mm, the rated current ≤ 63 or 80 A; for the circuit breaker of this embodiment, when the width of its housing h is 30 mm, the rated current ≤ 125 A; for the circuit breaker of this embodiment, when the width of its housing h is 60 mm, the rated current ≤ 250 A. For the circuit breaker of this embodiment, as the width of the housing h increases, the current-carrying capacity of the circuit breaker can be improved by increasing the number of moving contacts 8-0 and / or static contacts 8-1, or by increasing the thickness dimension (the dimension along the width direction of the circuit breaker) of the moving contacts 8-0 and / or static contacts 8-1. Further, the length of the housing h refers to the distance between the outer side surfaces of the two side walls perpendicular to the length direction of the housing h, the width of the housing h refers to the distance between the outer side surfaces of the two side walls perpendicular to the width direction of the housing h, and the height of the housing h refers to the distance between the outer side surfaces of the two side walls perpendicular to the height direction of the housing h.

[0084] As Figure 1 shown, the following is a layout method of the circuit breaker of this embodiment.

[0085] The length direction, width direction, and height direction of the circuit breaker of this embodiment are perpendicular to each other. The length direction of the circuit breaker is direction d1, and the height direction of the circuit breaker is direction d2. Specifically, as Figure 1 shown in the direction, Figure 1 the up and down direction is the length direction of the circuit breaker, Figure 1 the left and right direction is the height direction of the circuit breaker, Figure 1 and the inside and outside direction of the paper surface is the width direction of the circuit breaker.

[0086] In the direction d1, the operating member 1 is arranged at one end of the housing h, the tripping system 3 and the operating mechanism 2 are arranged in the middle of the housing h, and the arc extinguishing system 6 and the sampling device 4 are arranged at the other end of the housing h; the arc extinguishing system 6 and the sampling device 4 are arranged side by side in the direction d2; the circuit board 5-0 of the control circuit board 5 and the operating mechanism 2 are arranged in a stacked manner along the width direction of the circuit breaker. Further, in the direction d2, the tripping system 3 and the arc extinguishing system 6 are arranged at one end of the housing 1, and the operating member 1, the operating mechanism 2 and the sampling device 4 are arranged at the other end of the housing 1; that is, in the direction d2, both the tripping system 3 and the arc extinguishing system 6 are located on the same side of the operating member 1, the operating mechanism 2 and the sampling device 4.

[0087] For the circuit breaker of this embodiment, its layout is reasonable and compact, which is conducive to realizing the miniaturization of the circuit breaker.

[0088] Further, the sampling device 4 is also arranged side by side with the circuit board 5-0 along the width direction of the circuit breaker.

[0089] Further, the contact system 8 is also arranged side by side with the circuit board 5-0 along the width direction of the circuit breaker.

[0090] Further, the arc extinguishing system 6 is also arranged side by side with the circuit board 5-0 along the width direction of the circuit breaker.

[0091] It should be noted that the size of the circuit board 5-0 can be adjusted according to actual needs, and whether the sampling device 4, the contact system 8 and the arc extinguishing system 6 are arranged side by side with the circuit board 5-0 along the width direction of the circuit breaker can also be adjusted according to needs.

[0092] Further, the ejector rod of the tripping system 3 is arranged to move in the direction d1, which means that the axial direction of the electromagnetic coil of the tripping system 3 is also the same as the direction d1.

[0093] Further, the operating member 1, the transmission member 2-0, the lever assembly 2l, and the sampling device 4 are arranged in sequence in the direction d1; the tripping system 3 and the transmission member 2-0 are arranged side by side in the direction d2. Arranging the tripping system 3 that occupies a large space and the transmission member 2-0 that occupies a small space side by side is conducive to further improving the compactness of the internal layout of the circuit breaker. Further, the axial direction of the rotating shaft of the transmission member 2-0 and the lever assembly 2l is the same as the width direction of the circuit breaker.

[0094] Further, in the direction d1, the operating member 1 and the second terminal 7-1 are arranged at one end of the housing, and the first terminal 7-0 is arranged at the other end of the housing h. The operating mechanism 2, the tripping system 3, the sampling device 4, and the arc extinguishing system 6 are located between the operating member 1 and the first terminal 7-0. That is to say, at the two ends of the housing h with the farthest distance in the direction d1, the operating member 1 and the second terminal 7-1 are arranged at one end, and the first terminal 7-0 is arranged at the other end, and the operating mechanism 2, the tripping system 3, the sampling device 4, and the arc extinguishing system 6 are located between these two ends.

[0095] As other embodiments, in the direction d1, the first terminal 7-0 and the second terminal 7-1 are arranged at one end of the circuit breaker, and the operating member 1 is arranged at the other end of the circuit breaker. That is to say, the first terminal 7-0 and the second terminal 7-1 are arranged on the same end of the circuit breaker.

[0096] Further, the signal terminal 10 is arranged side by side with the first terminal 7-0 in the direction d2, and the signal terminal 10 and the first terminal 7-0 are located at one end of the housing 1 in the direction d1. Further, the first terminal 7-0, the signal terminal 10, and the third terminal 9-0 are arranged side by side in sequence in the direction d2.

[0097] Further, the fourth terminal is arranged side by side with the second terminal 7-1 in the width direction of the circuit breaker and side by side with the operating member 1 in the direction d2. The fourth terminal, the second terminal 7-1, and the operating member 1 are located at one end of the housing 1 in the direction d1.

[0098] Further, the through conductor 9-2 is arranged side by side with the main circuit in the direction d2, and the operating mechanism 2, the tripping system 3, the contact system 8, the arc extinguishing system 6, and the sampling device 4 are located on one side of the through conductor 9-2 in the direction d2.

[0099] Further, the connecting conductor 8-2 is arranged side by side with the circuit board 5-0 in the width direction of the circuit breaker. The first sampling terminal 5-1 is arranged on the circuit board 5-0. The connecting conductor 8-2 and the first sampling terminal 5-1 are located on the same side of the circuit board 5-0. Further, the connecting conductor 8-2 is a connecting conductive plate. At least part of the connecting conductive plate is arranged side by side with the tripping system 3 in the length direction of the circuit breaker, and this part is plugged and electrically connected to the first sampling terminal 5-1. The first sampling terminal 5-1 is arranged side by side with the tripping system 3 in the length direction of the circuit breaker and is located between the tripping system 3 and the arc extinguishing system 6. The first sampling terminal 5-1 is arranged side by side with the operating mechanism 2 in the height direction of the circuit breaker. Further, the first sampling terminal 5-1 is arranged side by side with the lever assembly 2l of the operating mechanism 2 in the height direction of the circuit breaker.

[0100] Further, the second sampling terminal 5-2 is arranged on the circuit board 5-0, and at least part of the straight-through conductor 9-2 is arranged side by side with the circuit board 5-0 and both are located on the same side of the circuit board 5-0. Further, the second sampling terminal 5-2 is arranged side by side with the tripping system 3 along the length direction of the circuit breaker and is located between the tripping system 3 and the arc extinguishing system 6, and the second sampling terminal 5-2 is also arranged side by side with the operating mechanism 2 along the height direction of the circuit breaker. Further, the second sampling terminal 5-2 is arranged side by side with the lever assembly 2l of the operating mechanism 2 along the height direction of the circuit breaker. Further, the second sampling terminal 5-2, the first sampling terminal 5-1 and the lever assembly 2l are arranged side by side in sequence along the height direction of the circuit breaker.

[0101] Furthermore, the first locking member 11 and the operating member 1 are arranged side by side along the direction d2.

[0102] Furthermore, the second locking member 12 and the operating member 1 are arranged side by side along the direction d2.

[0103] Furthermore, the first locking member 11 and the second locking member 12 are arranged side by side along the width direction of the circuit breaker.

[0104] Further, in the direction d2, the second terminal 7 - 1 and the fourth terminal are located on one side of the operating member 1 , and the first locking member 11 and the second locking member 12 are located on the other side of the operating member 1 .

[0105] As another embodiment, the circuit breaker of the utility model is not provided with an operating member 1, but a handle for external force operation is provided. The handle is rotatably provided on the housing h and switches between the closing position and the opening position by rotation. The operating mechanism 2 includes a lever assembly 2l. The structure of the lever assembly 2l is the same as described above. The handle is connected to the locking member 2-3 of the lever assembly 2l through a connecting rod 2-1. The layout of the other structures of the circuit breaker except the operating member 1 and the transmission member 2-0 is similar to or the same as that of the circuit breaker of this embodiment, and may also need to be adaptively adjusted. The functions of the first locking member 11 and the second locking member 12 remain unchanged, but the matching method of the two with the handle needs to be adjusted.

[0106] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0107] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A circuit breaker, comprising a housing (h) and a main circuit, wherein the main circuit comprises an operating member (1) slidably arranged on the housing (h), an operating mechanism (2), a contact system (8), and an arc extinguishing system (6) coordinated with the contact system (8), all of which are arranged in the housing (h); the operating mechanism (2) is in transmission cooperation with the operating member (1) and comprises a snap-fit ​​locking member (2-3) and a jumper (2-4); the contact system (8) comprises a moving contact (8-0) and a stationary contact (8-1) which are transmission-connected with the operating mechanism (2); Features: The circuit breaker further comprises a control system (5), a tripping system (3) and a sampling device (4) respectively connected to the control system (5), wherein the sampling device (4) is coupled to the contact system (8); the control system (5) is at least used to control the tripping system (3) to act when a short-circuit current and / or an overload current flows through the contact system (8), and the tripping system (3) acts to release the snap fit between the tripping member (2-4) and the locking member (2-3) to drive the circuit breaker to open.

2. The circuit breaker according to claim 1, characterized in that: The sampling device (4) comprises a manganese copper shunt connected in series with the contact system (8); or, the sampling device (4) comprises a current transformer coupled with the contact system (8).

3. The circuit breaker according to claim 1, characterized in that: In the length direction of the circuit breaker, the operating member (1) is arranged at one end of the housing (h), the tripping system (3) and the operating mechanism (2) are arranged in the middle of the housing (h), and the arc extinguishing system (6) and the sampling device (4) are arranged at the other end of the housing (h); the arc extinguishing system (6) and the sampling device (4) are arranged side by side along the height direction of the circuit breaker; the control system (5) comprises a circuit board (5-0), and the circuit board (5-0) and the operating mechanism (2) are arranged in a stacked manner along the width direction of the circuit breaker.

4. The circuit breaker according to claim 3, characterized in that: The operating mechanism (2) further comprises a connecting rod (2-1), a transmission member (2-0) and a lever assembly (21) which are rotatably arranged on the housing (h); the lever assembly (21) comprises a rotating plate (2-2) which is rotatably arranged on the housing (h), and a locking member (2-3) and a jumper (2-4) which are rotatably arranged on the rotating plate (2-2); the operating member (1) is in transmission cooperation with the transmission member (2-0); the transmission member (2-0) is transmission-connected to the locking member (2-3) via the connecting rod (2-1); the rotating plate (2-2) is transmission-connected to the moving contact (8-0); The operating member (1), the transmission member (2-0), the connecting rod (2-1), the lever assembly (21), and the sampling device (4) are arranged in sequence along the length direction of the circuit breaker; and the tripping system (3) and the transmission member (2-0) are arranged side by side along the height direction of the circuit breaker.

5. The circuit breaker according to claim 4, characterized in that: The circuit breaker also includes a transmission rod (1c), and the operating member (1) is connected to the transmission member (2-0) via the transmission rod (1c).

6. The circuit breaker according to claim 3, characterized in that: The tripping system (3) is a direct-acting electromagnetic tripping device, and the top rod of the tripping system (3) is arranged to move along the height direction of the circuit breaker.

7. The circuit breaker according to claim 3, characterized in that: The main circuit also includes a first terminal (7-0) and a second terminal (7-1), and the contact system (8) is connected in series between the first terminal (7-0) and the second terminal (7-1).

8. The circuit breaker according to claim 7, characterized in that: The second terminal (7-1) and the operating member (1) are arranged side by side along the height direction of the circuit breaker; in the length direction of the circuit breaker, the operating member (1) and the second terminal (7-1) are arranged at one end of the housing (h) and the first terminal (7-0) is arranged at the other end of the housing (h); the operating mechanism (2), the tripping system (3), the sampling device (4) and the arc extinguishing system (6) are located between the operating member (1) and the first terminal (7-0).

9. The circuit breaker according to claim 8, characterized in that: In the height direction of the circuit breaker, the second terminal (7-1), the tripping system (3) and the arc extinguishing system (6) are arranged at one end of the housing (h), and the operating member (1), the operating mechanism (2), the sampling device (4) and the first terminal (7-0) are arranged at the other end of the housing (h).

10. The circuit breaker according to claim 8, characterized in that: The main circuit also includes a connecting conductor (8-2), and the static contact (8-1) is electrically connected to the second terminal (7-1) via the connecting conductor (8-2); the connecting conductor (8-2) and the circuit board (5-0) are arranged side by side along the width direction of the circuit breaker.

11. The circuit breaker according to claim 10, characterized in that: The connecting conductor (8-2) is a connecting conductive plate; the control system (5) further comprises a first sampling terminal (5-1) arranged on the circuit board (5-0) and connected thereto, the connecting conductive plate and the first sampling terminal (5-1) being plug-connected and electrically connected, and the connecting conductive plate and the first sampling terminal (5-1) are located on the same side of the circuit board (5-0) in the width direction of the circuit breaker.

12. The circuit breaker according to claim 11, characterized in that: At least a portion of the connecting conductor (8-2) is arranged side by side with the tripping system (3) along the length direction of the circuit breaker and the portion is plugged and electrically connected to the first sampling terminal (5-1); the first sampling terminal (5-1) is arranged side by side with the tripping system (3) along the length direction of the circuit breaker and is located between the tripping system (3) and the arc extinguishing system (6); and the first sampling terminal (5-1) is arranged side by side with the operating mechanism (2) along the height direction of the circuit breaker.

13. The circuit breaker according to claim 8, characterized in that: The circuit breaker also includes a secondary circuit, which is a through circuit and includes a third terminal (9-0), a through conductor (9-2) and a fourth terminal connected in series.

14. The circuit breaker according to claim 13, characterized in that: The third terminal (9-0) and the first terminal (7-0) are arranged side by side in the height direction of the circuit breaker, the fourth terminal and the second terminal (7-1) are arranged side by side in the width direction of the circuit breaker, and the fourth terminal and the operating member (1) are arranged side by side in the height direction of the circuit breaker, and the straight-through conductor (9-2) and the main circuit are arranged side by side in the height direction of the circuit breaker.

15. The circuit breaker according to claim 13, characterized in that: The control system (5) further comprises a second sampling terminal (5-2) arranged on the circuit board (5-0) and connected thereto; the through conductor (9-2) is a through conductive plate, at least a portion of which is arranged side by side with the circuit board (5-0) along the width direction of the circuit breaker and is plugged and electrically connected to the second sampling terminal (5-2); at least a portion of which is located on the same side of the circuit board (5-0) as the second sampling terminal (5-2).

16. The circuit breaker according to claim 15, characterized in that: The second sampling terminal (5-2) and the tripping system (3) are arranged side by side along the length direction of the circuit breaker and are located between the tripping system (3) and the arc extinguishing system (6); the second sampling terminal (5-2) and the operating mechanism (2) are arranged side by side along the height direction of the circuit breaker.

17. The circuit breaker according to claim 7, characterized in that: In the length direction of the circuit breaker, the first terminal (7-0) and the second terminal (7-1) are arranged at one end of the circuit breaker, and the operating member (1) is arranged at the other end of the circuit breaker.

18. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a first locking mechanism, the first locking mechanism comprising a first locking piece (11) slidably arranged in the housing (h) and a first locking piece reset spring, the first locking piece reset spring acting on the first locking piece (11) to make it have a tendency to move toward the outside of the housing (h) and to make the first locking piece protrusion of the first locking piece (11) protrude outside the housing (h), and when the first locking piece protrusion is squeezed by an external force, the first locking piece (11) is driven to move toward the inside of the housing (h); the first locking piece (11) is driven by the operating piece (1) pulled out in the opening position to move toward the inside of the housing (h).

19. The circuit breaker according to claim 18, characterized in that: The circuit breaker further comprises a second locking mechanism, the second locking mechanism comprising a second locking member (12) rotatably arranged in the housing (h); when the operating member (1) moves from the opening position to the closing position, the second locking member (12) is driven by the operating member (1) to rotate in the forward direction so that the second locking protrusion of the second locking member (12) moves toward the outside of the housing (h); when the operating member (1) moves from the closing position to the opening position, the second locking member (12) rotates in the reverse direction so that the second locking protrusion moves toward the inside of the housing (h); when the operating member (1) is in the closing position, the second locking member (12) is restricted by the operating member (1) and cannot rotate in the reverse direction.

20. The circuit breaker according to claim 19, characterized in that: When the operating member (1) moves from the closing position to the opening position, the second locking member (12) is driven by the operating member (1) to rotate in the reverse direction.

21. The circuit breaker according to claim 19, characterized in that: The second locking member (12) is driven by the operating member (1) pulled out in the opening position to rotate in the reverse direction, and the first locking member (11) is driven by the reversely rotating second locking member (12) to move toward the inside of the housing (h).

22. The circuit breaker according to claim 1, characterized in that: The length, width and height of the shell (h) are the same as those of the circuit breaker; the length of the shell (h) is 100-150 mm, the width is 10-60 mm, and the height is 38-45 mm.

23. The circuit breaker according to claim 22, characterized in that: The width of the shell (h) is 10 mm, 15 mm, 20 mm, 30 mm or 60 mm.

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