CN222995333U - breaker - Google Patents

Abstract

The utility model relates to the field of low-voltage electrical appliances, and specifically to a circuit breaker, wherein a main circuit comprises an operating member, an operating mechanism that cooperates with the operating member in transmission, a contact system, and an arc extinguishing system that cooperates with the contact system, wherein the operating mechanism comprises a locking member and a tripping member that are snap-fitted, and the contact system comprises a moving contact and a stationary contact that are transmission-connected with the operating mechanism; a sampling device is coupled with the contact system, and a control system is at least used for controlling the action of a tripping system when a short-circuit current and/or an overload current flows through the contact system, and the action of the tripping system is used for releasing the snap-fitting of the tripping member and the locking member to drive the circuit breaker to open; the circuit breaker is suitable for a variety of current protection threshold requirements.

Description

Circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a circuit breaker.

Background

The existing circuit breaker, especially the intelligent circuit breaker, realizes the short-circuit protection function and overload protection function through the electromagnetic release and the bimetallic strip which are respectively arranged, the bimetallic strip is connected with the electromagnetic release in series with the contact system of the circuit breaker, the current capacity or the protection characteristic is fixed, the circuit breaker cannot be simultaneously suitable for different current specifications, and the internal structure of the circuit breaker is complex and occupies large space. In addition, existing circuit breakers, particularly intelligent circuit breakers, lack a structure that prevents the circuit breaker from being pulled out of a circuit breaker mounting cabinet (e.g., a power distribution cabinet, a control cabinet, or other electrical cabinet) in a closed state and that prevents the circuit breaker from being installed in the circuit breaker mounting cabinet in the closed state.

Disclosure of utility model

The object of the present utility model is to overcome at least one of the drawbacks of the prior art and to provide a circuit breaker which is adapted to a variety of current protection threshold requirements.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

The circuit breaker comprises a shell and a main loop, wherein the main loop comprises an operating piece arranged on the shell in a sliding way, an operating mechanism, a contact system and an arc extinguishing system matched with the contact system, wherein the operating mechanism, the contact system and the arc extinguishing system are arranged in the shell;

The circuit breaker further comprises a control system, a tripping system and a sampling device, wherein the tripping system and the sampling device are respectively connected with the control system, the sampling device is coupled with the contact system, the control system is at least used for controlling the tripping system to act when short-circuit current and/or overload current flow through the contact system, and the tripping system is used for releasing the snap fit of the tripping device and the locking device to drive the circuit breaker to open.

Further, the sampling device comprises a manganese copper shunt connected in series with the contact system, or the sampling device comprises a current transformer coupled with the contact system.

Further, in the length direction of the circuit breaker, the operating piece is arranged at one end of the shell, the tripping system and the operating mechanism are arranged in the middle of the shell, the arc extinguishing system and the sampling device are arranged at the other end of the shell, the arc extinguishing system and the sampling device are arranged side by side along the height direction of the circuit breaker, and the control system comprises a circuit board, and the circuit board and the operating mechanism are arranged in a stacked mode along the width direction of the circuit breaker.

The operating mechanism further comprises a connecting rod, a transmission piece and a lever assembly, wherein the transmission piece and the lever assembly are respectively arranged on the shell in a rotating mode, and the lever assembly comprises a rotating plate, a locking piece and a jump fastener, the rotating plate is arranged on the shell in a rotating mode, the locking piece and the jump fastener are respectively arranged on the rotating plate in a rotating mode;

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

Further, the circuit breaker further comprises a transmission rod, and the operating piece is in transmission connection with the transmission piece through the transmission rod.

Further, the tripping system is a direct-type electromagnetic tripping device, and a push rod of the tripping system is arranged in a moving manner along the height direction of the circuit breaker.

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.

In the length direction of the breaker, the operating member and the second terminal are arranged at one end of the shell, the first terminal is arranged at the other end of the shell, and the operating mechanism, the tripping system, the sampling device and the arc extinguishing system are arranged between the operating member and the first terminal.

Further, in the height direction of the circuit breaker, the second terminal, the trip system and the arc extinguishing system are disposed at one end of the case, and the operating member, the operating mechanism, the sampling device and the first terminal are disposed at the other end of the case.

Furthermore, the main loop further comprises a connecting conductor, the fixed contact is electrically connected with the second terminal through the connecting conductor, and the connecting conductor and the circuit board are arranged side by side along the width direction of the circuit breaker.

The control system further comprises a first sampling terminal which is arranged on the circuit board and connected with the circuit board, the connection conducting plate is connected with the first sampling terminal in an inserting and electric mode, and the connection conducting plate and the first sampling terminal are located on the same side of the circuit board in the width direction of the circuit breaker.

Further, at least part of the connecting conductor and the tripping system are arranged side by side along the length direction of the circuit breaker, the part is electrically connected with a first sampling terminal in a plugging mode, the first sampling terminal and the tripping system are arranged side by side along the length direction of the circuit breaker and are positioned between the tripping system and the arc extinguishing system, and the first sampling terminal and the operating mechanism are arranged side by side along the height direction of the circuit breaker.

Further, the circuit breaker further comprises a secondary loop, wherein the secondary loop is a through circuit and comprises a third terminal, a through conductor and a fourth terminal which are sequentially connected in series.

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, the fourth terminal and the operating element are arranged side by side along the height direction of the circuit breaker, and the through conductor and the main circuit are arranged side by side along the height direction of the circuit breaker.

The control system further comprises a second sampling terminal which is arranged on the circuit board and connected with the circuit board, the through conductor is a through conducting plate, at least part of the through conducting plate and the circuit board are arranged side by side along the width direction of the circuit breaker and are connected with the second sampling terminal in an inserting mode, and at least part of the through conducting plate and the second sampling terminal are located on the same side of the circuit board.

Further, the second sampling terminal and the tripping system are arranged side by side along the length direction of the circuit breaker and are positioned 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.

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

Further, the circuit breaker further comprises a first locking mechanism, the first locking mechanism comprises a first locking piece and a first locking piece reset spring, the first locking piece is arranged in the shell in a sliding mode, the first locking piece reset spring acts on the first locking piece to enable the first locking piece to move towards the outside of the shell, a first locking piece protrusion of the first locking piece protrudes out of the shell, the first locking piece protrusion is driven to move towards the inside of the shell when being extruded by external force, and the first locking piece is driven to move towards the inside of the shell by an operating piece pulled at a brake separating position.

The circuit breaker further comprises a second locking mechanism, the second locking mechanism comprises a second locking piece rotatably arranged in the shell, when the operating piece moves from the opening position to the closing position, the second locking piece is driven by the operating piece to rotate positively to enable a second locking protrusion of the second locking piece to move towards the outside of the shell, when the operating piece moves from the closing position to the opening position, the second locking piece rotates reversely to enable the second locking protrusion to move towards the inside of the shell, and when the operating piece is in the closing position, the second locking piece is limited by the operating piece and cannot rotate reversely.

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 reversely rotate.

Further, the second locking member is reversely rotated by the operation member pulled at the opening position, and the first locking member is moved toward the inside of the housing by the second locking member reversely rotated.

Further, the length direction, the width direction and the height direction of the shell are the same as the length direction, the width direction and the height direction of the circuit breaker, the length of the shell is 100-150 mm, the width is 10-60 mm, and the height is 38-45 mm.

Further, the width of the shell is 10mm, 15mm, 20mm, 30mm or 60mm.

Compared with the existing circuit breaker, the circuit breaker disclosed by the utility model can meet the requirements of various protection current thresholds, and is more accurate in action and better in protection effect.

In addition, the control system is matched with the tripping system to realize the short circuit and overload protection functions, compared with the existing circuit breaker, the circuit breaker does not need to be provided with an electromagnetic tripping device for realizing the short circuit protection function and a bimetallic strip for realizing the overload protection function, is beneficial to simplifying the internal structure of the circuit breaker, is convenient for the internal layout design of the circuit breaker and is beneficial to realizing the miniaturization of the circuit breaker, moreover, the control system is matched with the tripping system, can meet the protection requirements (different current protection thresholds) of the circuit breaker with different specifications, and only needs to adjust corresponding parameters according to the protection requirements.

In addition, the circuit breaker of the utility model arranges the tripping system occupying a larger space and the transmission piece occupying a smaller space side by side, which is beneficial to further improving the compactness of the internal layout of the circuit breaker.

In addition, the first locking piece prevents the circuit breaker from being pulled out of the circuit breaker installation cabinet in a closing state, so that personal safety of operators is guaranteed, and electricity utilization safety and continuity are guaranteed.

In addition, the second locking piece prevents the circuit breaker from being installed into the circuit breaker installation cabinet in a closing state, so that personal safety of operators is guaranteed, and electric shock accidents are avoided when the circuit breaker is installed.

In addition, the first locking piece of operating piece drive through the second locking piece removes to the inside of casing to need not to additionally set up the structure that is used for driving the first locking piece and removes to the inside of casing, be favorable to reducing the spare part quantity of circuit breaker, improve the compactedness of circuit breaker inside overall arrangement.

Drawings

Fig. 1 is a schematic structural view of the circuit breaker of the present utility model.

Description of the reference numerals

A shell h;

an operation element 1;

A transmission rod 1c;

the device comprises an operating mechanism 2, a lever assembly 2l, a transmission part 2-0, a connecting rod 2-1, a rotating plate 2-2, a locking part 2-3 and a jump fastener 2-4;

a tripping system 3;

A sampling device 4;

The control system 5, the circuit board 5-0, the first sampling terminal 5-1 and the second sampling terminal 5-2;

An arc extinguishing system 6;

a first terminal 7-0, a second terminal 7-1;

a moving contact 8-0, a fixed contact 8-1 and a connecting conductor 8-2;

a third terminal 9-0, a through conductor 9-2;

A signal terminal 10;

A first locking member 11;

A second locking member 12;

indicator i.

Detailed Description

Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1, one embodiment of the circuit breaker of the present utility model is shown.

The circuit breaker of the embodiment is preferably a plug-in circuit breaker and comprises a shell h and a main loop, wherein the main loop comprises an operating piece 1 arranged on the shell h in a sliding mode, an operating mechanism 2, a contact system 8 and an arc extinguishing system 6, wherein the operating piece 2, the contact system 8 and the arc extinguishing system 6 are arranged in the shell h in a matched mode, the arc extinguishing system 6 is matched with the contact system 8 and used for extinguishing an arc generated by the operating piece, the operating piece 1 is matched with the operating mechanism 2 in a transmission mode, the contact system 8 comprises a moving contact 8-0 and a fixed contact 8-1 which are matched with each other, and the operating mechanism 2 is connected with the moving contact 8-0 in a transmission mode. 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 transmission fit with the operating mechanism 2, and the operating member 1 has a switching-off position and a switching-on position and is switched between the switching-off position and the switching-on position by sliding.

In the circuit breaker of the embodiment, when the operating member 1 is pushed by an external force to move into the housing h to move to a closing position, the operating member 1 drives the moving contact 8-0 to close with the fixed contact 8-1 through the operating mechanism 2, even if the circuit breaker is closed, and when the operating member 1 is pulled by the external force to move out of the housing h to move to a breaking position, the operating member 1 drives the moving contact 8-0 to break with the fixed contact 8-1 through the operating mechanism 2, even if the circuit breaker is broken.

As another embodiment, after the operating member 1 is pressed by an external force to close the circuit breaker by the operating mechanism 2, the operating member 1 is pressed again to open the circuit breaker by the operating mechanism 2, and this operating mode can be realized by the prior art and will not be described here.

In the circuit breaker of the embodiment, the operating mechanism 2 comprises a snap-fit locking piece 2-3 and a tripping piece 2-4, and when the circuit breaker of the embodiment normally opens and closes (for example, the operating piece 1 performs opening and closing operation), the locking piece 2-3 and the tripping piece 2-4 keep the snap-fit. The operating mechanism 2 is realized by adopting the prior art, for example, the operating mechanism 2 comprises a connecting rod 2-1, a transmission part 2-0 and a lever component 2l which are respectively and rotatably arranged on a shell h, the lever component 2l comprises a rotating plate 2-2 which is rotatably arranged on the shell h, a locking part 2-3 and a jump fastener 2-4 which are respectively and rotatably arranged on the rotating plate 2-2, the operating part 1 is in transmission fit with the transmission part 2-0 to drive the transmission part to rotate, the transmission part 2-0 is in transmission connection with the locking part 2-3 through the connecting rod 2-1, and the rotating plate 2-2 is in transmission connection with the moving contact 8-0. Further, the moving contact 8-0 is driven by the rotating plate 2-2 to rotate so as to be closed and opened with the fixed contact 8-1.

Further, in the circuit breaker of the present embodiment, the main circuit further includes a transmission rod 1c, and the operating member 1 is in transmission connection with the transmission member 2-0 via the transmission rod 1 c. Specifically, two ends of the transmission rod 1c are respectively and rotatably connected with the operation piece 1 and the transmission piece 2-0.

The circuit breaker of the embodiment further comprises a control system 5, a tripping system 3 and a sampling device 4, wherein the tripping system 3 and the sampling device 4 are respectively connected with the control system 5, the sampling device 4 is coupled with the contact system 8, the control system 5 is at least used for controlling the tripping system 3 to act when short-circuit current and/or overload current flows through the contact system 8, and the tripping system 3 is used for releasing the snap fit of the tripping device 2-4 and the locking device 2-3 so as to drive the circuit breaker to open. Further, the tripping system 3 is a direct-type electromagnetic tripping device, such as a shunt tripping device, and a push rod of the electromagnetic tripping device drives the tripping device 2-4 to release the snap fit with the tripping device 2-3 so as to drive the breaker to open. Specifically, when the control system 5 detects that the contact system 8 flows a short-circuit current and/or an overload current through the sampling device 4, the control system 5 controls the tripping system 3 to act, the ejector rod of the tripping system 3 drives (e.g. drives in a pressing manner) the tripping element 2-4 to rotate so as to release the snap fit with the tripping element 2-3, and the operating mechanism trips, so that the breaker is opened. Further, the control system 5 is at least used for controlling the tripping system 3 to act when a short circuit current and an overload current flow through the contact system 8. Further, the control system 5 controls the tripping system 3 to act when the sampling device 4 detects overvoltage and/or undervoltage faults, and the tripping system 3 acts to drive the tripping device 2-4 to release the snap fit with the latching device 2-3 so as to drive the breaker to open.

Compared with the existing circuit breaker, the circuit breaker can meet the requirements of various protection current thresholds, and is more accurate in action and better in protection effect. Furthermore, the control system 5 and the tripping system 3 are matched to realize the short-circuit protection function and the overload protection function, compared with the existing circuit breaker, the circuit breaker does not need to be provided with an electromagnetic tripping device for realizing the short-circuit protection function and a bimetallic strip for realizing the overload protection function, the internal structure of the circuit breaker is facilitated to be simplified, the internal layout design of the circuit breaker is facilitated, the miniaturization of the circuit breaker is facilitated, and the control system 5 and the tripping system 3 are matched to meet the protection requirements of circuit breakers of different specifications, and only corresponding parameters are required to be adjusted according to the protection requirements.

As other embodiments, the tripping system 3 may also be a clapping electromagnetic trip, where the clapping electromagnetic trip includes an armature and a yoke that are matched, and the armature is in driving fit with the trip piece 2-4, and when the control system 5 detects that the contact system 8 flows a short circuit current and an overload current through the sampling device 4, the control system 5 controls the tripping system 3 to act, and the armature of the tripping system 3 drives the trip piece 2-4 to rotate so as to release the snap fit with the trip piece 2-3. Further, the connecting conductor 8-2 of the main circuit is located between the armature and the magnetic yoke, and the electromagnetic field generated by the connecting conductor 8-2 is used for attracting the armature to act through the magnetic yoke.

It should be noted that the "electromagnetic release" refers to a release in a broad sense including an electromagnetic coil and a driving member (such as a push rod, an armature, etc.) driven by the electromagnetic coil, and a magnetic field generated by energizing the electromagnetic coil drives the driving member to act, rather than a release in a narrow sense only for achieving short-circuit protection of a circuit breaker.

Further, the arc extinguishing system 6 comprises an arc extinguishing chamber.

In the circuit breaker of this embodiment, the main circuit further 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, i.e. 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 a wire inlet terminal of the main circuit, and the second terminal 7-1 is a wire outlet terminal of the main circuit, both of which are electrically connected with the corresponding external conductor in a plugging manner.

Further, the main circuit further comprises a connecting conductor 8-2, and the fixed contact 8-1 is electrically connected with the second terminal 7-1 through the connecting conductor 8-2. Specifically, the connection conductor 8-2 is a connection conductive plate, and the control system 5 further comprises a first sampling terminal 5-1 connected with the circuit board 5-0, and the connection conductive plate is electrically connected with the first sampling terminal 5-1. Further, the connecting conductive plate and the fixed contact 8-1 are of an integrated structure.

In the circuit breaker of this embodiment, the sampling device 4 comprises a manganese copper shunt in series with the contact system 8. Further, the first terminal 7-0, the manganese copper shunt, the contact system 8 and the second terminal 7-1 are connected in series in sequence. Further, the first terminal 7-0, the manganese copper shunt, the moving contact 8-0, the fixed contact 8-1 and the second terminal 7-1 are sequentially connected in series. Further, the sampling device 4 further comprises a sampling mechanism, such as a voltage transformer, for collecting the voltage signal and coupled to the contact system 8.

As a further embodiment, the sampling device 4 comprises a current transformer coupled to the contact system 8. Specifically, the first terminal 7-0 is connected in series with the contact system 8 via a sampling conductor that passes through the middle of the current transformer. Further, the sampling device 4 further comprises a voltage transformer, which is coupled to the contact system 8. Specifically, the sampling conductor passes through the middle of the voltage transformer.

Further, the main circuit further includes a signal terminal 10 connected to the circuit board 5-0, where the signal terminal 10 is configured to receive an external signal (e.g., a switching control signal, etc.) and/or transmit data (e.g., operating status data of the circuit breaker—current, voltage, switching status, etc.).

The circuit breaker of the present embodiment further includes a secondary loop, which is a through circuit and includes a third terminal 9-0, a through conductor 9-2, and a fourth terminal connected in series in order. The through circuit refers to a circuit without break points, the third terminal 9-0 and the fourth terminal are respectively connected with an external circuit, and the through circuit can conduct electricity directly. Specifically, the third terminal 9-0 and the fourth terminal are an incoming terminal and an outgoing terminal of the secondary loop, respectively.

It should be noted that, the circuit breaker of the present embodiment may be configured with only a main circuit, and the circuit breaker of the present embodiment is a single-phase circuit breaker (1 p-type circuit breaker), or the circuit breaker of the present embodiment may be configured with both a main circuit and a sub-circuit, and the circuit breaker of the present embodiment is a two-phase circuit breaker (1p+1n-type circuit breaker).

Further, the control system 5 further comprises a second sampling terminal 5-2 connected with the circuit board 5-0, and the second sampling terminal 5-2 is electrically connected with the through conductor 9-2. Further, the through conductor 9-2 is a through conductive plate, and the through conductive plate is in plug-in electrical connection with the second sampling terminal 5-2.

The circuit breaker of the present embodiment further includes an indicator i for the opening and closing state of the circuit breaker. Further, the indicator i is rotatably disposed in the middle of the operating element 1, the indicator i is switched between a closing indication position and a opening indication position along with the switching of the operating element 1 between the closing position and the opening position, that is, when the operating element 1 moves to the closing position, the indicator i is driven (e.g., driven by the structure of the housing h) to rotate to the closing indication position, and when the operating element 1 moves to the opening position, the indicator i is driven (e.g., driven by the structure of the housing h) to rotate to the opening indication position, and the operating element 1 is provided with an indication hole matched with the indicator i. The mounting relationship between the indicator i and the operating element 1 and the driving relationship between the indicator i and the housing h may be implemented by the prior art, and will not be described herein.

The circuit breaker of the embodiment further comprises a first locking mechanism, the first locking mechanism comprises a first locking piece 11 and a first locking piece reset spring which are interactively arranged in the shell h, the first locking piece reset spring acts on the first locking piece 11 to enable the first locking piece 11 to have a trend of moving towards the outside of the shell h, a first locking piece bulge of the first locking piece 11 protrudes out of the shell h, the first locking piece bulge drives the first locking piece 11 to move towards the inside of the shell h when being extruded by external force (namely, when the first locking piece bulge is extruded by external force), the whole first locking piece 11 moves towards the inside of the shell h under the driving of the first locking piece bulge, and the first locking piece 11 is driven by the operating piece 1 pulled at the opening position to move towards the inside of the shell h, namely, when the circuit breaker is in the opening state, the operating piece 1 is pulled at the opening position to drive the first locking piece 11 to move towards the inside of the shell h.

In actual use, the circuit breaker of this embodiment is installed in the circuit breaker installation cabinet such as switch board, switch board or other electric cabinet), first locking protrusion receives the structure extrusion of circuit breaker installation cabinet and moves to casing h inside, can not influence the circuit breaker and install the assigned position of circuit breaker installation cabinet, treat that the circuit breaker is installed assigned position and is in place the back, first locking protrusion can be relative and to the first locking hole that the assigned position department of circuit breaker installation cabinet set up and remove and insert in the first locking hole to with circuit breaker installation cabinet spacing cooperation, make the circuit breaker can not be pulled out the assigned position of circuit breaker installation cabinet under the combined floodgate state, both guaranteed operating personnel's personal safety, have guaranteed reliability and the stability of power consumption.

Further, the circuit breaker of the present embodiment further includes an unlocking device by which the first locking member 11 is driven to move toward the inside of the housing h when the operating member 1 is pulled at the opening position. Specifically, the unlocking device is an unlocking rod, the middle part of the unlocking rod is abutted against the shell h and can rotate by taking the shell h as a fulcrum, two ends of the unlocking rod are respectively in transmission fit with the operating piece 1 and the first locking piece 11, in the opening state of the circuit breaker, the operating piece 1 is in an opening position, the operating piece 1 is pulled to drive the unlocking rod to rotate, and the first locking piece 11 is driven to move towards the interior of the shell h when the unlocking rod rotates.

The circuit breaker of the embodiment further comprises a second locking mechanism, the second locking mechanism comprises a second locking piece 12 rotatably arranged in the shell h, when the operating piece 1 moves from the opening position to the closing position, the second locking piece 12 is driven by the operating piece 1 to rotate positively so that a second locking protrusion of the second locking piece 12 moves outwards of the shell h, namely, when the operating piece 1 moves from the opening position to the closing position, the second locking piece 12 is driven to rotate positively so that the second locking protrusion moves outwards of the shell h, when the operating piece 1 moves from the closing position to the opening position, the second locking piece 12 rotates reversely so that the second locking protrusion moves inwards of the shell h, and the second locking piece 12 can be driven by other structures (such as a second locking piece reset spring) except the operating piece 1 to rotate reversely, namely, when the operating piece 1 moves from the opening position to the closing position, the second locking piece 12 is limited by the operating piece 1 and cannot rotate reversely, namely, the second locking protrusion is kept outside the shell h. Further, the second locking protrusion is a square protrusion, so that when the operating member 1 is at the closing position (i.e., the circuit breaker of the present embodiment is in the closing state), the second locking protrusion is forcibly pressed by the structure of the circuit breaker installation cabinet to damage or deform the second locking member 12, and the circuit breaker is directly installed into the circuit breaker installation cabinet.

The second locking piece 12 of the circuit breaker of the embodiment is driven by the operating piece 1 to rotate forward to enable the second locking protrusion to move towards the outside of the shell h when the operating piece 1 moves from the opening position to the closing position, and the second locking protrusion is used for limiting and matching with the structure of a circuit breaker installation cabinet (such as a power distribution cabinet, a control cabinet or other electric cabinets), so that the circuit breaker of the embodiment is prevented from being installed in the circuit breaker installation cabinet in the closing state, the personal safety of an operator is ensured, the circuit breaker of the embodiment is installed in the circuit breaker installation cabinet in the opening state and is installed in place, the second locking protrusion protruding outside the shell h is also used for being opposite to and extending into a second locking hole of the circuit breaker installation cabinet, and the operating piece 1 is limited to rotate reversely when in the closing position, and therefore the circuit breaker of the embodiment is prevented from being pulled out of the circuit breaker installation cabinet in the closing state, the personal safety of the operator is ensured, the circuit breaker of the embodiment is ensured, and the second locking protrusion is prevented from moving reversely when the operating piece 1 is installed in the opening position, and the second locking protrusion is not matched with the second locking protrusion is moved from the second locking protrusion 12 when the second locking protrusion is moved from the opening position.

In the circuit breaker of the present embodiment, when the operating element 1 is moved from the closing position to the opening position, the second locking element 12 is driven by the operating element 1 to rotate reversely, so that the second locking protrusion moves into the housing h.

Specifically, the middle part of the second locking member 12 is rotatably disposed on the housing h, one end is provided with a second locking protrusion, the end is a locking end, and the other end is in transmission fit with the operating member 1, and the end is a matching end. Further, the second locking member 12 also serves as an unlocking means. Further, in the circuit breaker of the present embodiment, in the open state, the operating member 1 is in the open position, the operating member 1 is pulled to drive the second locking member 12 to reversely rotate through the mating end, and the locking end drives the first locking member 11 to move toward the inside of the housing h. Further, the first locking member 11 includes an unlocking portion in driving engagement with an unlocking end of the second locking member 12, and in the circuit breaker of this embodiment, in the opening state, the operating member 1 is in the opening position, the operating member 1 is pulled to drive the second locking member 12 to reversely rotate through the engagement end, and the second locking member 12 drives the first locking member 14 to move toward the inside of the housing h by the locking end abutting against the engagement portion.

As another embodiment, the circuit breaker of the present embodiment includes a second locking member return spring acting on the second locking member 12 to cause the second locking member 12 to have a tendency to reversely rotate, and when the operating member 1 moves from the closing position to the opening position, the operating member 1 no longer restricts the second locking member 12 from reversely rotating, and the force of the second locking member return spring drives the second locking member 15 to reversely rotate.

It should be noted that the circuit breaker of the present embodiment may be provided with only the first locking member 11 or the second locking member 12, and the unlocking device is further provided when the circuit breaker of the present embodiment is provided with only the first locking member. The circuit breaker of the present embodiment may further be provided with the first locking member 11 and the second locking member 12 at the same time, and the circuit breaker of the present embodiment is not provided with the unlocking means independently of the first locking member 11 and the second locking member 12, but uses the second locking member 12 as the unlocking means.

Further, the length direction, the width direction and the height direction of the shell h are the same as the length direction, the width direction and the height direction 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. The height dimension of the shell h is the module dimension of the circuit breaker. Further, the width is 10, 15, 20, 25, 30, 60mm. Further, the circuit breaker of the embodiment has a rated current of not more than 32A when the width of the housing h is 10mm, a rated current of not more than 63 or 80A when the width of the housing h is 15, 20 or 25mm, a rated current of not more than 125A when the width of the housing h is 30mm, and a rated current of not more than 250A when the width of the housing h is 60mm. The circuit breaker of the present embodiment can improve the current carrying capacity of the circuit breaker by increasing the number of the moving contacts 8-0 and/or the fixed contacts 8-1, or by increasing the thickness dimension (dimension in the width direction of the circuit breaker) of the moving contacts 8-0 and/or the fixed contacts 8-1, as the width of the case h increases. Further, the length of the housing h refers to the distance between the outer sides of the two side walls of the housing h perpendicular to the length direction of the housing h, the width of the housing h refers to the distance between the outer sides of the two side walls of the housing h perpendicular to the width direction of the housing h, and the height of the housing h refers to the distance between the outer sides of the two side walls of the housing h perpendicular to the height direction of the housing h.

As shown in fig. 1, the following is a layout of the circuit breaker of the present embodiment.

The length direction, width direction and height direction of the circuit breaker in this embodiment are perpendicular to each other, the length direction of the circuit breaker is the direction d1, and the height direction of the circuit breaker is the direction d2. Specifically, as shown in fig. 1, the vertical direction of fig. 1 is the longitudinal direction of the circuit breaker, the horizontal direction of fig. 1 is the height direction of the circuit breaker, and the inside and outside direction of the paper of fig. 1 is the width direction of the circuit breaker.

In the direction d1, the operating piece 1 is arranged at one end of the shell h, the tripping system 3 and the operating mechanism 2 are arranged in the middle of the shell h, the arc extinguishing system 6 and the sampling device 4 are arranged at the other end of the shell h, the arc extinguishing system 6 and the sampling device 4 are arranged side by side along the direction d2, and the circuit board 5-0 of the control circuit board 5 and the operating mechanism 2 are arranged in a stacked mode along the width direction of the circuit breaker. Further, in said direction d2, the trip 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, i.e. in said direction d2, the trip system 3 and the arc extinguishing system 6 are located at the same side of the operating member 1, the operating mechanism 2 and the sampling device 4.

The circuit breaker of the embodiment has reasonable and compact layout, and is beneficial to realizing miniaturization of the circuit breaker.

Further, the sampling device 4 is also arranged side by side with the wiring board 5-0 in the width direction of the circuit breaker.

Further, the contact system 8 is also arranged side by side with the wiring board 5-0 in the width direction of the circuit breaker.

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

It should be noted that the dimensions of the circuit board 5-0 may be adjusted according to actual needs, and whether the sampling device 4, the contact system 8, and the arc extinguishing system 6 are parallel to the circuit board 5-0 along the width direction of the circuit breaker may also be adjusted according to needs.

Further, the plunger of the trip system 3 is movably arranged in the direction d1, which means that the axial direction of the solenoid of the trip system 3 is also the same as the direction d 1.

Furthermore, the operating member 1, the transmission member 2-0, the lever assembly 2l and the sampling device 4 are sequentially arranged along the direction d1, the tripping system 3 and the transmission member 2-0 are arranged side by side along the direction d2, and the tripping system 3 occupying a larger space and the transmission member 2-0 occupying a smaller space are arranged side by side, so that the compactness of the internal layout of the circuit breaker is further improved. Further, the axial direction of the rotating shaft of the transmission part 2-0 and the lever assembly 2l is the same as the width direction of the circuit breaker.

Further, in said 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 trip system 3, the sampling device 4 and the arc extinguishing system 6 being located between the operating member 1 and the first terminal 7-0. That is, in the direction d1, the case h has the operation member 1 and the second terminal 7-1 arranged at one end and the first terminal 7-0 arranged at the other end, and the operating mechanism 2, the trip system 3, the sampling device 4, and the arc extinguishing system 6 are located between the two ends.

As a further embodiment, in said 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, i.e. the first terminal 7-0 and the second terminal 7-1 are arranged at the same end of the circuit breaker.

Further, the signal terminal 10 and the first terminal 7-0 are arranged side by side along 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 d 1. Further, the first terminal 7-0, the signal terminal 10 and the third terminal 9-0 are sequentially arranged side by side along the direction d 2.

Further, the fourth terminal and the second terminal 7-1 are arranged side by side in the width direction of the circuit breaker and side by side in the direction d2 with the operation member 1, and the fourth terminal, the second terminal 7-1 and the operation member 1 are located at one end of the housing 1 in the direction d 1.

Further, the through conductor 9-2 and the main circuit are arranged side by side along 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 positioned on one side of the through conductor 9-2 along the direction d2.

Further, the connection conductor 8-2 and the circuit board 5-0 are arranged side by side along the width direction of the circuit breaker, the first sampling terminal 5-1 is arranged on the circuit board 5-0, and the connection conductor 8-2 and the first sampling terminal 5-1 are positioned on the same side of the circuit board 5-0. Further, the connection conductor 8-2 is a connection conductive plate, at least part of the connection conductive plate and the tripping system 3 are arranged side by side along the length direction of the circuit breaker, the part is in plug-in electrical connection with the first sampling terminal 5-1, the first sampling terminal 5-1 and the tripping system 3 are arranged side by side along the length direction of the circuit breaker and are positioned between the tripping system 3 and the arc extinguishing system 6, and the first sampling terminal 5-1 and the operating mechanism 2 are arranged side by side along the height direction of the circuit breaker. Further, the first sampling terminal 5-1 and the lever assembly 2l of the operating mechanism 2 are arranged side by side along the height direction of the circuit breaker.

Further, the second sampling terminal 5-2 is disposed on the circuit board 5-0, and at least part of the through conductor 9-2 is disposed side by side with the circuit board 5-0 and is located on the same side of the circuit board 5-0. Further, 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 positioned between the tripping system 3 and the arc extinguishing system 6, and the second sampling terminal 5-2 and the operating mechanism 2 are also arranged side by side 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 sequentially arranged side by side along the height direction of the circuit breaker.

Further, the first locking member 11 is arranged side by side with the operating member 1 along the direction d 2.

Further, the second locking member 12 is arranged side by side with the operating member 1 along the direction d 2.

Further, the first locking member 11 and the second locking member 12 are arranged side by side in the width direction of the circuit breaker.

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

As other embodiments, the circuit breaker of the utility model is not provided with an operating member 1, but is provided with a handle for external force operation, the handle is rotatably arranged on a shell h and is switched between a closing position and a separating position by rotation, the operating mechanism 2 comprises a lever assembly 2l, the structure of the lever assembly 2l is the same as that described above, the handle is in transmission connection with a locking piece 2-3 of the lever assembly 2l through a connecting rod 2-1, the layout of other structures except the operating member 1 and a transmission member 2-0 of the circuit breaker is similar or identical to that of the circuit breaker of the embodiment, and the functions of the first locking member 11 and the second locking member 12 are unchanged, but the matching mode of the first locking member and the second locking member and the handle needs to be adjusted.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (23)

1. A circuit breaker comprises a shell (h) and a main loop, wherein the main loop comprises an operating piece (1) arranged on the shell (h) in a sliding manner, an operating mechanism (2), a contact system (8) and an arc extinguishing system (6) matched with the contact system (8), the operating mechanism (2) is in transmission fit with the operating piece (1) and comprises a snap-fit locking piece (2-3) and a snap-fit piece (2-4), the contact system (8) comprises a moving contact (8-0) and a fixed contact (8-1) which are in transmission connection with the operating mechanism (2);

The circuit breaker is characterized by further comprising a control system (5), a tripping system (3) and a sampling device (4), wherein the tripping system (3) and the sampling device (4) are respectively connected with the control system (5), the sampling device (4) is coupled with the contact system (8), the control system (5) is at least used for controlling the tripping system (3) to act when short-circuit current and/or overload current flows through the contact system (8), and the tripping system (3) is used for releasing the snap fit of the tripping device (2-4) and the locking device (2-3) so as 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 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, wherein the operating member (1) is arranged at one end of a housing (h) in a length direction of the circuit breaker, the trip system (3) and the operating mechanism (2) are arranged in a middle portion of the housing (h), 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 a height direction of the circuit breaker, and 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 in a width direction of the circuit breaker.

4. The circuit breaker according to claim 3, wherein the operating mechanism (2) further comprises a connecting rod (2-1) and a transmission piece (2-0) and a lever assembly (2 l) which are respectively arranged on the shell (h) in a rotating mode, the lever assembly (2 l) comprises a rotating plate (2-2) arranged on the shell (h) in a rotating mode and a locking piece (2-3) and a jumping piece (2-4) which are respectively arranged on the rotating plate (2-2) in a rotating mode, the operating piece (1) is in transmission fit with the transmission piece (2-0), the transmission piece (2-0) is in transmission connection with the locking piece (2-3) through the connecting rod (2-1), and the rotating plate (2-2) is in transmission connection with the moving contact (8-0);

The operating piece (1), the transmission piece (2-0), the connecting rod (2-1), the lever assembly (2 l) and the sampling device (4) are sequentially arranged along the length direction of the circuit breaker; the tripping system (3) and the transmission piece (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 further comprises a transmission rod (1 c), the operating member (1) being in transmission connection with the transmission member (2-0) via the transmission rod (1 c).

6. The circuit breaker according to claim 3, wherein the tripping system (3) is a direct type electromagnetic trip, and the ejector rod of the tripping system (3) is movably arranged along the height direction of the circuit breaker.

7. The circuit breaker according to claim 3, wherein the main circuit further comprises 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) is arranged side by side with the operating member (1) in the height direction of the circuit breaker, that 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) in the length direction of the circuit breaker, and that the operating mechanism (2), the trip 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 the second terminal (7-1), the trip system (3) and the arc extinguishing system (6) are arranged at one end of a housing (h) in a height direction of the circuit breaker, 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, wherein the main circuit further comprises a connection conductor (8-2), the stationary contact (8-1) is electrically connected with the second terminal (7-1) through the connection conductor (8-2), and the connection conductor (8-2) and the circuit board (5-0) are arranged side by side in the width direction of the circuit breaker.

11. The circuit breaker according to claim 10, wherein the connection conductor (8-2) is a connection conductive plate, the control system (5) further comprises a first sampling terminal (5-1) provided on the circuit board (5-0) to which the connection conductive plate is connected, the connection conductive plate is electrically connected with the first sampling terminal (5-1) in a plugging manner, and the connection 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 part of the connection conductor (8-2) is arranged side by side with the tripping system (3) in the length direction of the circuit breaker and the part is in plug-in electrical connection with 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 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) in the height direction of the circuit breaker.

13. The circuit breaker according to claim 8, characterized in that it further comprises a secondary circuit, which is a pass-through circuit and comprises a third terminal (9-0), a pass-through conductor (9-2) and a fourth terminal, connected in series in sequence.

14. The circuit breaker according to claim 13, characterized in that the third terminal (9-0) is arranged side by side with the first terminal (7-0) in the height direction of the circuit breaker, the fourth terminal is arranged side by side with the second terminal (7-1) in the width direction of the circuit breaker and the fourth terminal is arranged side by side with the operating member (1) in the height direction of the circuit breaker, and the through conductor (9-2) is arranged side by side with the main circuit 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 part of the through conductive plate is arranged side by side with the circuit board (5-0) along the width direction of the circuit breaker and is in plug-in electrical connection with the second sampling terminal (5-2), and at least part of the through conductive plate and the second sampling terminal (5-2) are positioned on the same side of the circuit board (5-0).

16. The circuit breaker according to claim 15, wherein 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 between the tripping system (3) and the arc extinguishing system (6), and 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, wherein the first terminal (7-0) and the second terminal (7-1) are provided at one end of the circuit breaker and the operating member (1) is provided at the other end of the circuit breaker in a length direction of the circuit breaker.

18. The circuit breaker according to claim 1, further comprising a first locking mechanism including a first locking member (11) slidably disposed in the housing (h) and a first locking member return spring acting on the first locking member (11) to cause the first locking member (11) to have a tendency to move toward the outside of the housing (h) and to cause a first locking member projection of the first locking member (11) to project outside of the housing (h), the first locking member projection being pressed by an external force to drive the first locking member (11) to move toward the inside of the housing (h), the first locking member (11) being driven by the operating member (1) pulled at the opening position to move toward the inside of the housing (h).

19. The circuit breaker according to claim 18, further comprising a second locking mechanism including a second locking member (12) rotatably disposed in the housing (h), wherein when the operating member (1) is moved from the opening position to the closing 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) is moved to the outside of the housing (h), wherein when the operating member (1) is moved from the closing position to the opening position, the second locking member (12) rotates reversely so that the second locking protrusion is moved to the inside of the housing (h), and wherein when the operating member (1) is in the closing position, the second locking member (12) is restricted by the operating member (1) so as not to rotate reversely.

20. The circuit breaker according to claim 19, wherein the second locking member (12) is driven by the operating member (1) to rotate reversely when the operating member (1) moves from the closing position to the opening position.

21. The circuit breaker according to claim 19, wherein the second locking member (12) is reversely rotated by the operation member (1) pulled at the opening position, and the first locking member (11) is moved toward the inside of the housing (h) by the driving of the reversely rotated second locking member (12).

22. The circuit breaker according to claim 1, wherein the length direction, width direction and height direction of the shell (h) are the same as the length direction, width direction and height direction 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 housing (h) is 10mm, 15mm, 20mm, 30mm or 60mm.