CN216902724U - Circuit breaker - Google Patents

Abstract

The utility model provides a circuit breaker, relate to low-voltage apparatus technical field, including the casing and set up the operating device in the casing, the electric leakage release, the circuit board, electrically conductive piece and test button, drive with electrically conductive relative both ends respectively through operating device and test button, and combine test circuit and indicating circuit that are located on the circuit board to be concerned with the cooperation of electrically conductive piece respectively, can be effectual with the divide-shut brake instruction of earth leakage protection test and circuit breaker and integrate, the effectual quantity that reduces spare part, thereby reduce the degree of difficulty of the inside overall arrangement of circuit breaker, be particularly useful for miniature circuit breaker. Meanwhile, the intelligent circuit breaker further comprises a signal port electrically connected with an external controller, breaker state information such as a switching-off signal, a switching-on signal and an electric leakage fault signal can be output to a remote control console through the signal port, and a control signal can be input to the circuit breaker through the signal port by the remote control console to control the switching-off of the circuit breaker and increase the intelligence of the circuit breaker.

Description

Circuit breaker

Technical Field

The application relates to the technical field of low-voltage apparatuses, in particular to a circuit breaker.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and the safety of household electricity utilization is required to be higher. The circuit breaker may be installed in a terminal distribution line. Meanwhile, the circuit can be connected, carried and disconnected under the condition of normal or abnormal circuit, and the circuit and the electrical equipment are effectively protected.

As one of the circuit breakers, the residual current circuit breaker is generally provided with an opening and closing indicating device and a leakage protection function, and in order to ensure that the leakage protection function is normal, a leakage testing device is also arranged, but because the existing leakage testing device and the existing opening and closing indicating device are generally independent devices, more parts are caused, the layout difficulty is high, and the residual current circuit breaker is difficult to be applied to a miniature circuit breaker.

SUMMERY OF THE UTILITY MODEL

An object of this application lies in, to the not enough among the above-mentioned prior art, provides a circuit breaker to solve present electric leakage testing arrangement and divide-shut brake indicating device's spare part more, lead to the overall arrangement degree of difficulty great, be difficult to be applicable to miniature circuit breaker's problem.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

in one aspect of the embodiments of the present application, there is provided a circuit breaker, including a housing, and an operating mechanism, an electrical leakage release, a circuit board, a conductive member and a test button disposed in the housing, wherein the operating mechanism is driven to close or open to control the on/off of a circuit in which the circuit breaker is located, the electrical leakage release is electrically connected to the circuit board and corresponds to the operating mechanism, the circuit board is respectively provided with an indicating circuit and a test circuit, the operating mechanism and the test button are respectively connected to two opposite ends of the conductive member in a driving manner, when the operating mechanism is driven to close and drives one end of the conductive member away from the indicating circuit to connect to the test circuit, the indicating circuit is disconnected to form a closing indicating signal, the test button is driven to drive the other end of the conductive member to move, so that the test circuit is connected to the circuit through the conductive member and forms an electrical leakage signal, the circuit board controls the electrical leakage release to drive the operating mechanism to move according to the electrical leakage signal, the indication circuit is switched on by switching off the operating mechanism and controlling one end of the conductive piece to form a switching-off indication signal.

Optionally, the indication circuit includes a first contact and a second contact arranged on the circuit board, and when the second contact is in contact with the conductive member, the operating mechanism is switched off and controls one end of the conductive member to be in contact with the first contact, so that the indication circuit is switched on through the first contact, the conductive member and the second contact and forms a switching-off indication signal.

Optionally, the conductive piece includes an installation portion installed on the housing, and a first elastic pin and a second elastic pin connected to the installation portion respectively, the first elastic pin is in driving connection with the operating mechanism, and the second elastic pin is in driving connection with the test button.

Optionally, the second contact contacts the mounting portion, or the second contact is integrally provided with the mounting portion.

Optionally, the second contact corresponds to a second elastic pin, and the second elastic pin provides a reset force to the test button so that the second elastic pin contacts with the second contact after the test button is reset.

Optionally, the indicating circuit further comprises an indicating member located on the circuit board and connected in series with the first contact and the second contact.

Optionally, the testing circuit further comprises a transformer electrically connected with the circuit board, the testing circuit is provided with a third contact on the circuit board, and when two ends of the conductive piece are respectively connected with the testing circuit and the loop, the transformer collects an analog current signal of the loop to form a leakage signal when the analog current signal is greater than a preset value, so that the circuit board controls the leakage release to drive the operating mechanism to open according to the leakage signal.

Optionally, the operating mechanism includes a handle, a transmission assembly and a contact assembly, the handle is in driving connection with the contact assembly through the transmission assembly, and the handle is in driving connection with one end of the conductive member.

Optionally, a shifting lever is further arranged on the handle, and the shifting lever is in driving connection with one end of the conductive piece.

Optionally, the circuit board is further provided with a signal port for electrically connecting with an external controller, the leakage signal, the closing indication signal and the opening indication signal are output to the controller through the signal port, and the circuit board is used for controlling the leakage release to drive the operating mechanism to open according to a control signal of the controller.

The beneficial effect of this application includes:

the application provides a circuit breaker, which comprises a shell, an operating mechanism, an electric leakage release, a circuit board, a conductive piece and a test button, wherein the operating mechanism is arranged in the shell and is driven to be switched on or off to control the on-off of a loop where the circuit breaker is positioned, the electric leakage release is electrically connected with the circuit board and corresponds to the operating mechanism, an indicating circuit and a test circuit are respectively arranged on the circuit board, the operating mechanism and the test button are respectively in driving connection with two opposite ends of the conductive piece, when the operating mechanism is driven to be switched on and drives one end of the conductive piece to be far away from the indicating circuit to be switched on with the test circuit, the indicating circuit is switched off to form a switching-on indicating signal, the test button is driven to drive the other end of the conductive piece to move, so that the test circuit is communicated with the loop through the conductive piece to form an electric leakage signal, the circuit board controls the electric leakage release to drive the operating mechanism to move according to control one end of the conductive piece to switch on the indicating circuit through the operating mechanism, forming a switching-off indication signal. Through operating device and test button respectively with the relative both ends drive of electrically conductive piece in this application to combine test circuit and indicating circuit that are located on the circuit board to be respectively with the cooperation relation of electrically conductive piece, can effectually integrate earth leakage protection test and the divide-shut brake of circuit breaker instruction, the effectual quantity that reduces spare part, thereby reduce the degree of difficulty of the inside overall arrangement of circuit breaker, be particularly useful for miniature circuit breaker. Meanwhile, the leakage tripper and the switching-on/off indicating function are combined with the signal port, and the intelligence of the circuit breaker can be further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic diagram illustrating an electrical leakage test state of a circuit breaker according to an embodiment of the present disclosure;

fig. 2 is a second schematic diagram illustrating a leakage test state of a circuit breaker according to an embodiment of the present disclosure;

fig. 3 is a third schematic diagram illustrating an electrical leakage testing state of a circuit breaker according to an embodiment of the present disclosure;

fig. 4 is a fourth schematic view illustrating an electrical leakage testing state of the circuit breaker according to the embodiment of the present application;

fig. 5 is a schematic diagram of a leakage test of a circuit breaker according to an embodiment of the present disclosure;

fig. 6 is a second schematic diagram of a leakage test of a circuit breaker according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram illustrating an electrical leakage testing state of a circuit breaker according to another embodiment of the present disclosure;

fig. 8 is a third schematic diagram of a leakage test of a circuit breaker according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram illustrating an electrical leakage test state of a circuit breaker according to yet another embodiment of the present application;

fig. 10 is a second schematic diagram illustrating a leakage test state of a circuit breaker according to another embodiment of the present application;

fig. 11 is a third schematic view illustrating a leakage test state of a circuit breaker according to another embodiment of the present application;

fig. 12 is a fourth schematic view illustrating a leakage test state of a circuit breaker according to yet another embodiment of the present application;

fig. 13 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application.

Icon: 102-a housing; 103-output terminal; 104-an input terminal; 105-a test button; 106-a handle; 108-signal port; 109-a circuit board; 110-leakage release; 111-an electromagnetic release; 114-a transformer; 116-a contact assembly; 119-an overload protection mechanism; 120-overload protection tripping; 125-a deflector rod; 126-neutral pole moving contact; 127-a neutral pole stationary contact; 129-a first contact; 130-a third contact; 131-a conductive member; 132-a second contact; 134-a bump; 135-resistance; 136-a transmission assembly; 145-indicator.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. Therefore, the various features of the embodiments of the present application may be combined with each other without conflict, and the combined embodiments are still within the scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when products of the application are used, and are only for convenience of description and simplification of the description, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In one aspect of the embodiments of the present application, there is provided a circuit breaker, as shown in fig. 1 and 13, including a housing 102, and an operating mechanism, an electrical leakage release 110, a circuit board 109, a conductive member 131, and a test button 105 disposed in the housing 102. As shown in fig. 13, the circuit in which the circuit breaker is located is turned on by closing the operation mechanism by an external force, or may be turned off by opening the operation mechanism by an external force. The electrical leakage release 110 is electrically connected to the circuit board 109, and the electrical leakage release 110 also corresponds to the operating mechanism, so that the operating mechanism in the closing state is driven by the electrical leakage release 110 to open when necessary.

As shown in fig. 1, an indication circuit and a test circuit are respectively disposed on the circuit board 109, and the operating mechanism and the test button 105 are respectively in driving connection with two opposite ends of the conductive member 131, so that when the operating mechanism is in an open state, the indication circuit is switched on by the conductive member 131, thereby generating an open indicating signal, and a user can conveniently identify the current state of the circuit breaker; meanwhile, when the operating mechanism is in a closing state and the conductive piece 131 is in contact with the test circuit, the conductive piece 131 is driven by the test button 105 to leave the indication circuit (i.e., the indication circuit is disconnected at this time to generate a closing indication signal) and to be in contact with the loop where the circuit breaker is located, so that the test circuit can be connected with the loop through the conductive piece 131 to generate an electric leakage signal, and the circuit board 109 controls the electric leakage release 110 to drive the operating mechanism to open, so that the electric leakage protection function of the circuit breaker can be tested.

As shown in fig. 1, when the operating mechanism is in the open state (the circuit in which the circuit breaker is located is also open), one end of the conductive member 131, which is in driving connection with the operating mechanism, is separated from the test circuit and is in contact with the indicating circuit, so that the indicating circuit is closed, and the open indicating signal is formed.

When the circuit needs to be closed, the operating mechanism in the state shown in fig. 1 is moved toward the closing direction by an external force, and in the process, the conductive member 131 is driven to leave the indicating circuit (the indicating circuit is disconnected, and a closing indicating signal is generated), and then when the operating mechanism is in the closing state (the circuit where the circuit breaker is located is also connected), the conductive member 131 is also made to contact with the test circuit (in the state shown in fig. 2), and at this time, a breakpoint of the test circuit is connected.

When the leakage protection function needs to be tested, the test button 105 may be driven by an external force in the state shown in fig. 2, the test button 105 drives the other end of the conductive piece 131 to move until contacting with the loop, that is, in the state shown in fig. 3, at this time, another breakpoint of the conductive piece 131 is also connected, the test circuit is connected with the loop through the conductive piece 131, so as to form a leakage signal, the circuit board 109 controls the leakage release 110 to act according to the leakage signal, so that the trip lever of the leakage release 110 drives the operating mechanism to move toward the opening direction, and further the loop is controlled to be disconnected, that is, at this time, in the state shown in fig. 4, it indicates that the leakage protection function of the circuit breaker is normal. The force applied to test button 105 may then be removed, causing test button 105 to reset and the other end of conductor 131 to separate from the circuit.

To sum up, drive through operating device and test button 105 respectively with the relative both ends of electrically conductive 131 in this application to combine test circuit and indicating circuit that are located on circuit board 109 to indicate with the cooperation of electrically conductive 131 respectively to be concerned, can be effectual with the divide-shut brake of earth leakage protection test and circuit breaker and instruct to integrate, the effectual quantity that reduces spare part, thereby reduce the degree of difficulty of the inside overall arrangement of circuit breaker, be particularly useful for miniature circuit breaker. Meanwhile, the leakage release and the switching-on and switching-off indicating function are combined with the signal port, and the intelligence of the circuit breaker can be further improved.

It should be understood that, during the process of the operation mechanism moving towards the opening direction, one end of the conductive member 131 is separated from the test circuit, so that the test circuit is disconnected from the loop, and therefore, even if the external force applied to the test button 105 is not removed, the test circuit cannot be connected with the loop, thereby avoiding the damage caused by the long time that the external force is applied to the test button 105 due to the improper operation of the operator and the long time that the test circuit is connected for a long time in the test of the leakage protection function.

In addition, when the circuit breaker is in the open state, both break points of the conductive member 131 are in the open state, as shown in fig. 2. At this time, if the test button 105 is pressed by mistake for a long time, only one of the double break points is closed, the other one is still in an open state, and the test circuit cannot be connected with the loop, so that damage caused by long-time connection of the test circuit when the test button 105 is pressed by mistake for a long time can be avoided.

When the operating mechanism is driven to close and drive one end of the conductive piece 131 to be far away from the indicating circuit to be connected with the testing circuit, the testing button 105 is driven to drive the other end of the conductive piece 131 to move, so that the testing circuit is communicated with the loop through the conductive piece 131 to form a leakage signal, and the circuit board 109 controls the leakage release 110 to drive the operating mechanism to move according to the leakage signal, so that the operating mechanism is opened and one end of the conductive piece 131 is controlled to connect the indicating circuit, and an opening indicating signal is formed.

Optionally, as shown in fig. 1 to 4, the indication circuit includes a first contact 129 and a second contact 132 disposed on the circuit board 109, so that when the conductive members 131 are both in contact with the first contact 129 and the second contact 132, the indication circuit can be turned on, so as to generate an opening indication signal, that is, the indication circuit also has a double break point, so as to indicate the opening and closing state of the circuit breaker more accurately.

As shown in fig. 1, when the second contact 132 contacts with the conductive member 131, one broken point of the indicating circuit is closed, and at this time, when the operating mechanism is in the open state, one end of the conductive member 131 which is matched with the operating mechanism contacts with the first contact 129, and at this time, the other broken point of the indicating circuit is closed, and the open indicating signal is generated.

As shown in fig. 2, when the operating mechanism is in a closed state, at this time, one end of the conductive member 131 in the indicating circuit, which is engaged with the operating mechanism, is separated from the indicating circuit, that is, at least one breakpoint in the indicating circuit is disconnected, the indicating circuit is not turned on, and a closed indicating signal is generated. When the operating mechanism is driven to open the brake, one end of the conductive element 131 which is in driving connection with the operating mechanism is enabled to leave the test circuit, and when the operating mechanism is in the brake-opening state, one end of the conductive element 131 is in contact with the first contact 129 of the indicating circuit, at this time, two situations exist: first, if the conductive member 131 does not contact with the second contact 132 of the indicating circuit, the indicating circuit is not conducted, and a closing indicating signal is generated; second, if the conductive member 131 contacts with the second contact 132 of the indicating circuit, the indicating circuit is turned on to generate a brake-off indicating signal.

Optionally, the test circuit may have a third contact 130 on the circuit board 109.

Alternatively, as shown in fig. 1 to 4, the conductive element 131 includes a mounting portion, a first elastic pin and a second elastic pin, wherein the mounting portion is mounted on the housing 102, so as to implement the assembly of the conductive element 131 on the housing 102, it should be understood that the conductive element 131 may be fixed with respect to the housing 102 or may rotate with respect to the housing 102 after being mounted on the housing 102 through the mounting portion. The first elastic pin and the second elastic pin are respectively connected to the mounting portion, wherein the first elastic pin is in driving connection with the operating mechanism, and the second elastic pin is in driving connection with the test button 105. In some embodiments, as shown in fig. 1 to 4 or fig. 9 to 12, the conductive member 131 may be a torsion spring, and the ring shape of the middle portion of the torsion spring is used as a mounting portion to be sleeved on the protrusion 134 of the housing 102, so as to mount the torsion spring to the housing 102. In addition, the conductive member 131 may be a tension spring or the like.

Therefore, as shown in fig. 1, when the operating mechanism is in the open state (the circuit in which the circuit breaker is located is also open), the first elastic pin of the conductive member 131 abuts against the operating mechanism, and the first elastic pin of the conductive member 131 contacts with the first contact 129 of the indicating circuit. When the operating mechanism moves towards the closing direction, the first elastic pin is driven to deform and leave the first contact 129, and when the operating mechanism is in the closing state, the first elastic pin of the conductive component 131 also contacts with the third contact 130 of the test circuit, as shown in fig. 2. When the actuator is opened, the first resilient pin is deformed to move away from the third contact 130 of the test circuit and into contact with the first contact 129 of the indicator circuit, as shown in fig. 3.

Similarly, as shown in fig. 1 or fig. 2, when the test button 105 is not subjected to an external force, the second elastic pin of the conductive component 131 is located at the position of fig. 1 or fig. 2, and at this time, the test button 105 protrudes out of the housing 102. When an external force is applied to the test button 105, the test button 105 deforms the second elastic pin until the second elastic pin contacts the circuit, as shown in fig. 3. When the external force applied to the test button 105 is removed, the second elastic pin is deformed again, so that the test button 105 is reset, i.e. extends out of the housing 102 again, as shown in fig. 1.

Optionally, the contact manner of the second contact 132 of the indication circuit with the conductive member 131 includes at least two ways:

one of them: second contact 132 is separate from conductor 131 and second contact 132 is in contact with conductor 131 only when needed, such as shown in fig. 1-4 or 9-12, where second contact 132 is a contact on circuit board 109 that is proximate to (but separate from) the second spring pin. The working principle is as follows: as shown in fig. 1, 9 or 5, when the operating mechanism is in the open state (the circuit in which the circuit breaker is located is also open), the first elastic pin of the conductive member 131 abuts against the operating mechanism, the first elastic pin of the conductive member 131 contacts with the indicating circuit, and the second elastic pin of the conductive member 131 abuts against the test button 105, at this time, the test button 105 is not subjected to an external force, and therefore, the second elastic pin contacts with the second contact 132, so that the indicating circuit is turned on, and the open indicating signal is generated. When the operating mechanism moves towards the closing direction, the first elastic pin is driven to deform and leave the first contact 129, at this time, the test button 105 still has no external force, so even if the second elastic pin still contacts with the second contact 132, the indication circuit is still disconnected, the opening indication signal disappears, and when the operating mechanism is in the closing state, the first elastic pin of the conductive component 131 also contacts with the third contact 130 of the test circuit, as shown in fig. 2 or fig. 10. When the leakage protection test is required, the external force drives the test button 105 to press down, so as to drive the second elastic pin to deform and leave the second contact 132, until the second elastic pin contacts the loop, so that the test circuit is connected to the loop through the third contact 130, the first elastic pin, the mounting portion, and the second elastic pin (as shown in fig. 3, 11, or 6), and generates a leakage signal, so as to cause the circuit board 109 to control the leakage release 110 to drive the operating mechanism to move toward the opening direction, at this time, the first elastic pin recovers to deform and leaves the third contact 130 of the test circuit, the test circuit is disconnected, and when the operating mechanism is in the opening state, the first elastic pin contacts the first contact 129 of the indicating circuit (as shown in fig. 4 or 12). Thereafter, when the external force applied to the test button 105 is removed, the second elastic pin is deformed back to leave the loop and contact with the second contact 132 of the indicating circuit, the indicating circuit is turned on, the opening indicating signal is generated, and the test button 105 is reset to the completion, as shown in fig. 1 or fig. 9.

The other one is as follows: the second contact 132 is always in contact with the conductive member 131, for example, as shown in fig. 7, the second contact 132 is always in contact with the mounting portion, that is, the conductive member 131 is in contact with the second contact 132 of the indicating circuit no matter how the first elastic pin and the second elastic pin are deformed. As shown in fig. 8, the indicating circuit corresponds to a single-break circuit. The working principle is as follows: as shown in fig. 1 and 8, when the operating mechanism is in the open state (the circuit in which the circuit breaker is located is also open), the first elastic pin of the conductive member 131 abuts against the operating mechanism, and the first elastic pin of the conductive member 131 contacts with the indicating circuit, so that the indicating circuit is closed due to the contact between the conductive member 131 and the second contact 132, and an open indicating signal is generated. When the operating mechanism moves towards the closing direction, the first elastic pin is driven to deform and leave the first contact 129, although the conductive piece 131 is in contact with the second contact 132, the indicating circuit is still disconnected, the opening indicating signal disappears, at this time, the test button 105 is still free from external force, and when the operating mechanism is in the closing state, the first elastic pin of the conductive piece 131 is also in contact with the third contact 130 of the test circuit. When the leakage protection test is required, the external force drives the test button 105 to press down to drive the second elastic pin to deform and contact with the loop, so that the test circuit is connected to the loop through the third contact 130, the first elastic pin, the mounting portion and the second elastic pin, and generates a leakage signal, the circuit board 109 controls the leakage release 110 to drive the operating mechanism to move towards the opening direction, at the moment, the first elastic pin recovers deformation and leaves the third contact 130 of the test circuit, the test circuit is disconnected, when the operating mechanism is in the opening state, the first elastic pin contacts with the first contact 129 of the indicating circuit, and the first elastic pin contacts with the second contact 132 all the time based on the conductive piece 131, therefore, the indicating circuit is connected, and the opening indicating signal is generated. Thereafter, the external force applied to the test button 105 is removed, the second resilient pin is deformed back out of the loop, and the test button 105 is reset to completion. It is also possible that the second contact 132 and the mounting portion of the conductive member 131 are the same conductive member, i.e., they are integrally provided.

Optionally, as shown in fig. 1-12, the indicator circuit further includes an indicator 145 located on the circuit board 109 and in series with the first contact 129 and the second contact 132. The indicator 145 may be an indicator lamp, such that when the indicating circuit is turned on, the indicator lamp is turned on to send an opening indicating signal to a user, and when the indicating circuit is turned off, the indicator lamp is turned off to send a closing indicating signal to the user.

Optionally, as shown in fig. 1 to 13, the circuit breaker further includes a transformer 114, a loop where the circuit breaker is located passes through the transformer 114, so that the transformer 114 collects a current signal of the loop where the circuit breaker is located, the transformer 114 is electrically connected to the circuit board 109, and when a current signal collected by the transformer 114 triggers a threshold, the circuit board 109 may control the operation of the electrical leakage release 110 according to the current signal, so that a trip bar of the electrical leakage release 110 drives the operating mechanism to move toward a trip direction, thereby implementing the trip, that is, the disconnection of the loop.

When the aforementioned leakage protection function is tested, the testing circuit may be turned on when the two ends of the conductive member 131 are respectively connected to the third contact 130 of the testing circuit on the circuit board 109 and the loop, at this time, the transformer 114 may collect the analog current signal in the loop, and compare the analog current signal with the preset value, when the analog current signal is greater than the preset value, a leakage signal is formed, the leakage signal controls the leakage release 110 to act through the circuit board 109, and the leakage release 110 drives the operating mechanism to disconnect the loop.

Alternatively, as shown in fig. 5 and 13, the circuit may include a first circuit and a second circuit, the second circuit may be a guard pole circuit, and the first circuit may be a neutral pole circuit. In order to realize the current signal acquisition of the transformer 114, both the neutral pole loop and the protection pole loop can pass through the through hole on the transformer 114, so that when the circuit breaker is normally switched on, the transformer 114 can acquire current signals on the neutral pole loop and the protection pole loop, and when the current signals trigger a threshold value (that is, the current signals are greater than a preset value), a leakage signal is formed, and the circuit board 109 correspondingly controls the leakage release 110 to drive the operating mechanism to open. In some embodiments, the transformer 114 may be a zero-sequence current transformer 114, that is, when the transformer 114 collects current signals of the neutral pole circuit and the protection pole circuit, it may collect current vector signals in both circuits, and when the sum of the two vectors is zero, it indicates that the circuit breaker is working normally; when the vector sum of the two is not zero, the occurrence of a leakage fault is indicated, at this time, a leakage signal is formed, and the circuit board 109 drives the leakage release 110 to drive the operating mechanism to open according to the current signal collected by the transformer 114.

As shown in fig. 5 and 13, to implement the testing of the leakage protection function of the circuit breaker, one end of the testing circuit on the circuit board 109 is connected to the protection pole circuit, and the third contact 130 at the other end of the testing circuit is engaged with the first elastic pin of the conductive member 131, so that, before the leakage function testing is performed, the operating mechanism is closed, that is, the protection pole circuit and the neutral pole circuit are controlled to be respectively conducted and the first elastic pin of the conductive member 131 is driven to leave the first contact 129 of the indication circuit (generating a closing indication signal) and to be connected with the third contact 130 of the testing circuit on the circuit board 109 (as shown in fig. 6). Then, an external force drives the test button 105, the test button 105 drives the second elastic pin of the conductive piece 131 to contact with the neutral pole loop, as shown in fig. 6, the test circuit is connected with the neutral pole loop through the conductive piece 131, that is, the protection pole loop is connected with the neutral pole loop through the test circuit and the conductive piece 131, so that the current vector signals collected by the transformer 114 on the protection pole loop and the neutral pole loop are not zero (leakage signals), the circuit board 109 controls the leakage release 110 to operate according to the leakage signals, and the operating mechanism is driven to open.

In some embodiments, as shown in fig. 5, a control circuit of the leakage release 110 is further disposed on the circuit board 109, that is, the leakage release 110 and the thyristor are connected in series to form the control circuit, the transformer 114 is connected to a gate of the thyristor, and when a current vector collected by the transformer 114 is not zero, a signal may be sent to the gate, so that the thyristor is switched from an off state to an on state, and at this time, the leakage release 110 is powered on, thereby realizing the movement of the trip bar under the action of the magnetic field force.

In some embodiments, as shown in fig. 5, the control circuit of the electrical leakage release 110 may be connected to the protection pole circuit and the neutral pole circuit, respectively, so as to take electricity from the protection pole circuit and the neutral pole circuit. In some embodiments, when the signal port 108 is further disposed on the circuit board 109, the control circuit of the electrical leakage release 110 may be powered from the outside through the signal port 108.

In some embodiments, as shown in fig. 5, in order to improve the safety of the leakage test, a resistor 135 may be connected in series in the test circuit, that is, the resistor 135 can perform current limiting when the test circuit and the conductive member 131 connect the protection pole circuit and the neutral pole circuit.

Alternatively, as shown in fig. 13, the operating mechanism includes a handle 106, a transmission assembly 136 and a contact assembly 116, the handle 106 is drivingly connected to the contact assembly 116 through the transmission assembly 136, and the handle 106 is drivingly connected to one end of the conductive member 131, so that the first elastic pin of the conductive member 131 can be driven to be connected to the third contact 130 of the test circuit of the circuit board 109 during the closing process of the contact assembly 116 driven by the handle 106.

As shown in fig. 1 to 13, the handle 106 is rotatably disposed on the housing 102, the handle 106 drives the contact assembly 116 to move through the transmission assembly 136, and a lever 125 is disposed on the handle 106, and the lever 125 extends toward the circuit board 109 and abuts against one end of the conductive member 131.

When the circuit breaker is located in a loop including a first loop and a second loop, the corresponding contact assembly 116 may include a first moving and static contact and a second moving and static contact which are disposed together on the same contact holder, wherein the contact holder is in driving connection with the transmission assembly 136, the first moving and static contact is used for forming the first loop, and the second moving and static contact is used for forming the second loop, so that the first moving and static contact and the second moving and static contact can be synchronously switched on or switched off under the driving of the handle 106. It should be understood that the aforementioned conduction of the circuit or the circuit breaker is in a closing state, that is, the moving contact and the fixed contact in the first moving and fixed contact are in contact, and the moving contact and the fixed contact in the second moving and fixed contact are in contact.

Taking the neutral pole loop as an example: as shown in fig. 13, an input terminal 104, an output terminal 103, an overload protection mechanism 119, a neutral moving contact 126, and a neutral stationary contact 127 are further disposed in the housing 102, the input terminal 104 is connected to the neutral moving contact 126 through the overload protection mechanism 119, and the neutral stationary contact 127 is connected to the output terminal 103 after passing through the transformer 114 through a flexible connection line. The guard pole loop works the same way.

When the overload protection of the overload protection mechanism 119 is implemented, the latch member in the contact assembly 116 is provided with the overload protection tripping portion 120, and the overload protection tripping portion 120 corresponds to the bimetal position of the overload protection mechanism 119, so that when the latch member is in the closing position and has an overload fault, the bimetal of the overload protection mechanism 119 deforms, and the overload protection tripping portion 120 is driven to drive the operating mechanism to open the latch member.

In addition, as shown in fig. 1, an electromagnetic trip 111 may be further provided in the second circuit, and the electromagnetic trip 111 may drive the operating mechanism to open when the breaker has a short-circuit fault.

As shown in fig. 1 to 13, the bimetal of the overload protection mechanism 119, the circuit board 109 and the conductive element 131 may be disposed in the same layer of chamber, so that when the test button 105 is pressed, the other end of the conductive element 131 is conveniently contacted with the bimetal of the overload protection mechanism 119, thereby connecting the other end of the conductive element 131 with the first circuit.

As shown in fig. 1 to 4, the two elastic pins of elastic conductive element 131 may be located on two opposite sides of protrusion 134 on housing 102, or as shown in fig. 9 to 12, the two elastic pins of elastic conductive element 131 are located on the same side of protrusion 134. It should be understood that both function in the same manner and are not described in detail herein.

Optionally, as shown in fig. 2 to fig. 5, a signal port 108 electrically connected to the circuit board 109 is further disposed on the circuit board 109, and the signal port 108 is used for electrically connecting to an external controller, so that the circuit board 109 can obtain power through the signal port 108 (for example, an indication circuit obtains power through the signal port 108), and at the same time, the closing indication signal, the opening indication signal, and the leakage signal generated in the foregoing embodiment can be output to the external controller through the signal port 108 on the circuit board 109, and in addition, an external controller can send a control signal to the circuit board 109 through the signal port 108, so that the circuit board 109 controls the leakage release 110 to operate to drive the operating mechanism to open the gate, thereby implementing the function of remote opening the gate.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A circuit breaker is characterized by comprising a shell (102), and an operating mechanism, an electric leakage release (110), a circuit board (109), a conductive piece (131) and a test button (105) which are arranged in the shell (102), wherein the operating mechanism is driven to be switched on or switched off to control the on/off of a loop where the circuit breaker is located, the electric leakage release (110) is electrically connected with the circuit board (109) and corresponds to the operating mechanism, an indicating circuit and a test circuit are respectively arranged on the circuit board (109), and the operating mechanism and the test button (105) are respectively in driving connection with two opposite ends of the conductive piece (131);

when the operating mechanism is driven to be switched on and drives one end of the conductive piece (131) to be far away from the indicating circuit to be switched on with the testing circuit, the indicating circuit is switched off to form a switching-on indicating signal, the testing button (105) is driven to drive the other end of the conductive piece (131) to move, so that the testing circuit is communicated with the loop through the conductive piece (131) to form a leakage signal, and the circuit board (109) controls the leakage release (110) to drive the operating mechanism to move according to the leakage signal, so that the operating mechanism is switched off and one end of the conductive piece (131) is controlled to switch on the indicating circuit to form a switching-off indicating signal.

2. The circuit breaker according to claim 1, wherein said indicating circuit comprises a first contact (129) and a second contact (132) arranged on said circuit board (109), when said second contact (132) contacts said conductive member (131), said operating mechanism opens and controls one end of said conductive member (131) to contact said first contact (129), so that said indicating circuit is switched on through said first contact (129), said conductive member (131) and said second contact (132) and forms a open-circuit indicating signal.

3. The circuit breaker of claim 2, wherein said conductive member (131) comprises a mounting portion mounted to said housing (102) and a first resilient pin and a second resilient pin connected to said mounting portion, respectively, said first resilient pin being drivingly connected to said operating mechanism and said second resilient pin being drivingly connected to said test button (105).

4. The circuit breaker of claim 3 wherein said second contact (132) is in contact with said mounting portion, or wherein said second contact (132) is integral with said mounting portion.

5. The circuit breaker of claim 3, wherein said second contact (132) corresponds to said second resilient pin, said second resilient pin providing a reset force to said test button (105) to contact said second contact (132) by said second resilient pin after said test button (105) is reset.

6. The circuit breaker of claim 2 wherein said indicator circuit further comprises an indicator member (145) located on said circuit board (109) and in series with said first contact (129) and said second contact (132).

7. The circuit breaker of claim 1, further comprising a transformer (114) electrically connected to the circuit board (109), wherein the test circuit has a third contact (130) on the circuit board (109), and when the two ends of the conductive member (131) are respectively connected to the third contact (130) of the test circuit and the loop, the transformer (114) collects an analog current signal of the loop to form a leakage signal when the analog current signal is greater than a preset value, so that the circuit board (109) controls the leakage release (110) to drive the operating mechanism to open according to the leakage signal.

8. The circuit breaker of claim 1, wherein said operating mechanism comprises a handle (106), a transmission assembly (136), and a contact assembly (116), said handle (106) being drivingly connected to said contact assembly (116) via said transmission assembly (136), and said handle (106) being drivingly connected to one end of said conductive member (131).

9. The circuit breaker according to claim 8, wherein a lever (125) is further disposed on said handle (106), said lever (125) being drivingly connected to one end of said conductive member (131).

10. The circuit breaker according to claim 1, wherein a signal port (108) is further disposed on the circuit board (109) for electrically connecting with an external controller, the leakage signal, the closing indication signal and the opening indication signal are output to the controller through the signal port (108), and the circuit board (109) is configured to control the leakage release (110) to drive the operating mechanism to open according to a control signal of the controller.

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