Circuit breaker incorporating a reset lock mechanism

Abstract

A reset lock mechanism for a circuit breaker includes a link, a rocker arm, an armature, a solenoid, and a plunger. The link is positioned to move between an open position and a closed position. The rocker arm is selectively engageable with the link. The armature is selectively engageable with the rocker arm. The plunger is supported by the solenoid and is operatively coupled to the armature. The plunger is movable between a first position and a second position.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an electrical switching apparatus, and more particularly, but not exclusively, to a circuit breaker that includes a reset lockout mechanism engaged by a single actuator such as a rocker arm. BACKGROUND

[0002] The electrical wiring device industry has witnessed an increasing demand for circuit interrupting devices or systems designed to protect against the dangers posed by overcurrent (e.g., overload / short circuit), ground fault, and arc fault. In particular, electrical codes require circuits in bathrooms and kitchens of homes to be equipped with ground fault circuit protection. For example, GFCI devices are resettable after tripping due to detection of a ground fault. A test button can be used to test the circuit for sensing faults and the tripping mechanism. A reset button can be used to reset the electrical connection between the input and output conductive paths. Certain resettable circuit interrupting devices are capable of locking the reset portion of the device if the circuit interrupting portion is not working or if there is an open neutral condition.

[0003] Existing resettable circuit breakers that provide fault protection capability have line phase terminals and line neutral terminals, and load phase terminals and load neutral terminals. In addition, the resettable circuit breakers also have a switch for controlling the distribution to the load phase terminals. To provide fault protection, such circuit breakers have a sensing circuit capable of sensing a fault (e.g., a ground fault). The circuit can be coupled to an actuator (e.g., an electromechanical actuator or a solenoid) such that upon sensing a fault, the circuit can cause the actuator to open the switch. SUMMARY

[0004] The existing challenges related to the foregoing, as well as other challenges, are overcome by systems and methods operating in accordance with the present disclosure.

[0005] According to one aspect, the present disclosure relates to a circuit breaker. The circuit breaker includes a conductive path, a link, a reset lockout mechanism, line phase terminals, load phase terminals, and line neutral terminals. The conductive path is formed between the line phase terminals and the load phase terminals. The conductive path has an open configuration and a closed configuration. The link is configured to move the conductive path between the open configuration and the closed configuration. The reset lockout mechanism is configured to prevent the conductive path from moving to the closed configuration when a predetermined condition exists. The reset lockout mechanism includes a rocker arm and an armature. The rocker arm is selectively engageable with the link, the rocker arm being configured to move the link between an open position and a closed position. The armature is selectively engageable with the rocker arm to hold the conductive path in the open configuration when the predetermined condition exists.

[0006] In an embodiment, the predetermined condition can include a ground fault between the load phase terminals and the line neutral terminals.

[0007] In various embodiments, the reset lock mechanism can further include a solenoid including a plunger, the solenoid configured to move the plunger between a first position and a second position, the plunger operably coupled to the armature.

[0008] In some embodiments, the rocker arm can include a first engagement surface configured to engage the armature.

[0009] In certain embodiments, the armature can include a first arm including an outer surface defining a recess configured to contact the first engagement surface of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to an ON state of the circuit breaker.

[0010] In embodiments, the armature can further include a second arm defining an armature slot. The plunger can include a lip configured to engage the armature slot.

[0011] In various embodiments, the reset lock mechanism can further include a spring configured to act as a detent and hold the armature in place.

[0012] In some embodiments, the rocker arm includes a second engagement surface. The second engagement surface can be configured to strike the armature when the rocker arm returns to a position corresponding to an OFF state of the circuit breaker.

[0013] In certain embodiments, the rocker arm is movable between a first position in which the conductive path is in an open configuration corresponding to an OFF state of the circuit breaker, an intermediate tripped position in which a fault or overcurrent condition occurs, and a second position in which the conductive path is in a closed configuration corresponding to an ON state of the circuit breaker.

[0014] In embodiments, the circuit breaker can further include a catch, wherein at least a portion of the conductive path can further include a contact arm. The catch and the contact arm can have a first spatial arrangement and a second spatial arrangement. When in the first spatial arrangement, the link can be prevented from engaging the catch and the contact arm to move the conductive path from the open configuration to the closed configuration. When in the second spatial arrangement, the link can be able to engage the catch and the contact arm to move the conductive path from the open configuration to the closed configuration. The catch and the contact arm can be in the first spatial arrangement when the rocker arm is in the intermediate tripped position.

[0015] In various embodiments, the first end of the link can be operably coupled to a bottom extension of the rocker arm and associated with a line side terminal such that movement of the link is configured to selectively move the conductive path between the open configuration and the closed configuration. The link can have a second end movably received within a link slot defined by the catch and the contact arm.

[0016] According to another aspect, the present disclosure relates to a reset lock mechanism for a circuit breaker. The reset lock mechanism includes a link, a rocker arm, an armature, a solenoid, and a plunger. The link is positioned to move between an open position and a closed position. The rocker arm is selectively engageable with the link. The armature is selectively engageable with the rocker arm. The plunger is supported by the solenoid and is operably coupled to the armature, the plunger being movable between a first position and a second position.

[0017] In embodiments, a conductive path can be formed between a line phase terminal and a load phase terminal, the conductive path having an open configuration and a closed configuration. The reset lock mechanism can be configured to prevent the conductive path from moving to the closed configuration when a predetermined condition exists.

[0018] In various embodiments, the predetermined condition can include a ground fault between the load phase terminal and a line neutral terminal.

[0019] In some embodiments, the solenoid can be configured to move the plunger between the first position and the second position.

[0020] In certain embodiments, the rocker arm can include an engagement face configured to engage the armature.

[0021] In embodiments, the armature can include a first arm including an outer surface defining a recess configured to contact the engagement face of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to an ON state of the circuit breaker.

[0022] In various embodiments, the armature can further include a second arm defining an armature slot. The plunger can include a lip configured to engage the armature slot.

[0023] In some embodiments, the reset lock mechanism can further include a spring configured to act as a detent and hold the armature in place.

[0024] According to yet another aspect, the present disclosure is directed to a method for preventing a conductive path in a circuit breaker from closing in the presence of a predetermined condition. The method includes determining whether a fault condition is detected when a rocker arm moves from a first position corresponding to an OFF state of the circuit breaker to a second position corresponding to an ON state of the circuit breaker, wherein the circuit breaker includes a line phase terminal and a load phase terminal, and wherein the circuit breaker further includes a conductive path formed between the line phase terminal and the load phase terminal. In the presence of the fault condition, the method further includes de-energizing a solenoid including a plunger, the solenoid configured to move the plunger to the first position when the solenoid is de-energized; moving an armature to the first position by the plunger, the armature configured to lock the rocker arm in the first position, in which the conductive path is open, corresponding to the OFF state of the circuit breaker; and preventing the conductive path from closing based on the first position of the armature. In the absence of the fault condition, the method further includes energizing the solenoid including the plunger, the solenoid configured to move the plunger to the second position when the solenoid is energized; moving the armature to the second position by the plunger, thereby unlocking the rocker arm from the armature; and closing the conductive path based on the second position of the armature, in which the conductive path is closed, corresponding to the ON state of the circuit breaker.

[0025] According to yet another aspect, the present disclosure is directed to a circuit breaker. The circuit breaker includes a line phase terminal; a load phase terminal; a line neutral terminal; a conductive path formed between the line phase terminal and the load phase terminal, the conductive path having an open configuration and a closed configuration; a link configured to move the conductive path between the open configuration and the closed configuration; a rocker arm selectively engageable with the link, the rocker arm configured to move the link between an open position and a closed position; and an armature selectively engageable with the rocker arm to prevent the conductive path from being in the closed configuration when a predetermined condition is present.

[0026] In various embodiments, the predetermined condition can include a ground fault between the load phase terminal and the line neutral terminal.

[0027] In certain embodiments, the circuit breaker can further include a solenoid supporting the plunger, the solenoid configured to move the plunger between the first position and the second position. The plunger includes a distal portion and a proximal portion. The proximal portion can be configured to provide a mechanical stop. The distal portion of the plunger can be operably coupled to the armature.

[0028] In some embodiments, the rocker arm can include an engagement face configured to engage the armature.

[0029] In various embodiments, the armature can include a first arm including an outer surface defining a recess, the recess configured to contact the engagement face of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to the ON state of the circuit breaker.

[0030] In certain embodiments, the armature can further include a second arm defining an armature slot, and the plunger can include a lip configured to engage the armature slot.

[0031] In some embodiments, the circuit breaker can further include a spring configured to act as a detent and hold the armature in place.

[0032] In various embodiments, the rocker arm can include an armature engagement face. The armature engagement face can be configured to strike the armature when the rocker arm returns to a position corresponding to an OFF state of the circuit breaker.

[0033] In certain embodiments, the rocker arm can be movable between a first position in which the conductive path is in an open configuration corresponding to an OFF state of the circuit breaker, an intermediate tripped position in which a fault or overcurrent condition occurs, and a second position in which the conductive path is in a closed configuration corresponding to an ON state of the circuit breaker.

[0034] In some embodiments, the circuit breaker can further include a pawl. At least a portion of the conductive path can further include a contact arm. The pawl and the contact arm can have a first spatial arrangement and a second spatial arrangement. When in the first spatial arrangement, the link can be prevented from engaging the pawl and the contact arm to move the conductive path from the open configuration to the closed configuration. When in the second spatial arrangement, the link can be able to engage the pawl and the contact arm to move the conductive path from the open configuration to the closed configuration. The pawl and the contact arm can be in the first spatial arrangement when the rocker arm is in the intermediate tripped position.

[0035] In various embodiments, a first end of the link can be operably coupled to a bottom extension of the rocker arm and associated with a line side terminal, such that movement of the link is configured to selectively move the conductive path between the open configuration and the closed configuration, the link having a second end movably received within a link slot defined by the pawl and the contact arm.

[0036] The details of one or more aspects of the disclosure are set forth in the accompanying drawings and the description below. Other aspects, features, and advantages will be apparent from the description, the drawings, and the claims. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with the description, explain the principles of the disclosure as set forth in the claims.

[0038] Figure 1is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0039] Figure 2 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker; Figure 1

[0040] Figure 3 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0041] Figure 4 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker; Figure 1

[0042] Figures 5-7 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0043] Figure 8 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker; Figure 1

[0044] Figure 9 and Figure 10 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0045] Figure 11 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker; Figure 1

[0046] Figure 12 and Figure 13 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0047] Figure 14 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0048] Figures 15-25 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0049] Figures 26-29 is a perspective view showing internal components of an embodiment of a circuit breaker according to the principles of the present disclosure, including a reset lock mechanism, shown in a position corresponding to the OFF state of the circuit breaker;

[0050] Figures 30-34 ​​​​is a progression diagram illustrating movement of the reset lock mechanism between positions corresponding to a transition from just beyond the MID-TRIP state of the circuit breaker to the OFF state;

[0051] Figure 35 is a flow diagram illustrating a process in accordance with the principles of the present disclosure;

[0052] Figure 36 is a plan view of an embodiment of a circuit breaker user interface incorporating indicator lights in accordance with the principles of the present disclosure;

[0053] Figure 37 is a perspective view of an embodiment of a dual pole circuit breaker in accordance with the principles of the present disclosure;

[0054] Figure 38 is a perspective view of internal components of a circuit breaker in accordance with the principles of the present disclosure; Figure 37

[0055] Figure 39 is a perspective view of a rocker arm of a reset lock mechanism of a circuit breaker in accordance with the principles of the present disclosure; and Figure 37

[0056] is a side view of internal components of a circuit breaker in accordance with the principles of the present disclosure, with the reset lock mechanism shown in a position corresponding to the OFF state of the circuit breaker. Figure 40 Figure 1 The accompanying drawings are included to provide illustration of embodiments of the present disclosure. It will be readily appreciated that alternative embodiments of the structures and methods illustrated herein can be employed without departing from the principles of the present disclosure described herein, as will be readily apparent to one of skill in the art from the following discussion. DETAILED DESCRIPTION

[0057] The present disclosure relates to resettable circuit interrupting devices or circuit breakers for opening and closing electrical communication between line terminals (e.g., inputs) and load terminals (e.g., outputs) of a device. Electrical communication between the line terminals and the load terminals can be achieved by establishing a conductive path between the line terminals and the load terminals. The devices described herein can be of any suitable type, such as but not limited to a ground fault circuit interrupter (GFCI), an arc fault circuit interrupter (AFCI), a ground fault protection equipment (GFPE), and suitable combinations thereof (e.g., an AFCI / GFCI circuit breaker). In general, the circuit interrupting devices in accordance with the present disclosure include a circuit interrupter, a reset portion, a reset lock mechanism, and a trip portion. It is contemplated that the circuit interrupter, the reset portion, the reset lock mechanism, and the trip portion can be combined in various ways or otherwise implemented without departing from the spirit or scope of the present disclosure.

[0058] The accompanying drawings are included to provide illustration of embodiments of the present disclosure. It will be readily appreciated that alternative embodiments of the structures and methods illustrated herein can be employed without departing from the principles of the present disclosure described herein, as will be readily apparent to one of skill in the art from the following discussion.

[0059] ​​The circuit interrupter includes line-side phase terminals and line-side neutral terminals and load-side phase terminals and load-side neutral terminals. The line-side phase terminals are capable of transmitting power to the load-side phase terminals when the line-side phase terminals are in electrical communication with the load-side phase terminals. Similarly, the line-side neutral terminals are capable of transmitting power to the load-side neutral terminals when the line-side neutral terminals are in electrical communication with the load-side neutral terminals. The line-side phase terminals and the line-side neutral terminals are connected to a power source and the load-side phase terminals and the load-side neutral terminals are connected to a branch circuit having one or more loads. These terminals can be, for example, any suitable electrical fastening device such as, but not limited to, terminal screws, lugs, fastening plates, jaw contacts, pins, prongs, sockets, and / or leads that ensure a conductive path to the circuit interrupter and ensure conduction.

[0060] The circuit interrupting portion and the reset portion generally use an electromechanical component (or multiple electromechanical components) to respectively open and reestablish the conductive path between the line phase terminals and the load phase terminals and the conductive path between the line phase terminals and the load neutral terminals. Examples of such electromechanical components include solenoids, bimetallics, hydraulic components, switches, relays, contactors, or any other suitable component capable of electromechanically engaging to open or reestablish the conductive path between the line terminals and the load terminals. In some embodiments, the circuit interrupter is separate in response to a particular fault type, such as the presence of an overcurrent, a ground fault, an arc fault, or a combination thereof. Additionally, the same circuit interrupter can be used to protect against overcurrent, ground fault, arc fault conditions, or a combination thereof. Furthermore, there can be individual independent circuit interrupters configured to react to overcurrent, ground fault, or arc fault protection, where the individual independent circuit interrupters are configured to share certain components.

[0061] To protect against overcurrent, arc fault, and ground fault, the circuit interrupter opens the electrical continuity between the line phase terminals and the load phase terminals by opening the circuit upon detection of a fault. For example, at least one mechanical connection between components associated with the conductive path can be removed.

[0062] Once the circuit interrupter opens the conductive path, the reset lockout mechanism is configured to prevent the circuit breaker from resetting or reestablishing the continuous or closed conductive path when a predetermined condition or fault is present. The reset lockout mechanism can be any lockout mechanism capable of preventing the reestablishment of the conductive path. For example, such a mechanism can include mechanical and / or electrical components and / or a predetermined routine executed by a control circuit that functions to prevent the reestablishment of the conductive path. For example, one or more of the mechanical components of the circuit breaker can be transitioned to a position where the circuit breaker is in an OFF state in which the components are positioned to lock one or more components of the circuit breaker to prevent the reestablishment of the conductive path.

[0063] The present disclosure contemplates various types of circuit interrupting devices. Generally, the circuit breakers function as resettable branch circuit protection devices that are capable of opening an electrically conductive path that supplies power between a line terminal and a load terminal in an electrical distribution system (or subsystem). For example, if a fault or an overcurrent condition is detected, the electrically conductive path is transitioned from a closed configuration (e.g., ON) to an open configuration (e.g., OFF). Fault detection can be performed by mechanical components and / or electrical components. Once the detected fault is resolved, the circuit breaker can be reset to enable the electrically conductive path to be reestablished.

[0064] The circuit breakers can provide fault protection for various types of faults or combinations of these faults. Faults can include conditions that make a circuit unsafe due to the presence of abnormal current and / or voltage. Contemplated examples of faults include, but are not limited to, ground faults, arc faults, submersion detection faults, appliance leakage faults, and equipment leakage faults. Although various types of fault protection circuit breakers are contemplated, for clarity, the following will be described with reference to GFCI circuit breakers and AFCI circuit breakers.

[0065] Exemplary embodiments of GFCI circuit breakers incorporating a reset lockout mechanism will now be described. Generally, each GFCI circuit breaker has a circuit interrupter, a reset portion, a reset lockout mechanism for selectively preventing the circuit breaker from transitioning from an OFF state to an ON state. Each GFCI circuit breaker can also include a trip portion that operates independently of the circuit interrupter. The trip portion can selectively transition the circuit breaker to a MID-TRIP state.

[0066] In the GFCI circuit breakers, the circuit interrupter and the reset portion can include electromechanical components configured to selectively open or break and / or close or reestablish an electrically conductive path between a line phase terminal and a load phase terminal. Additionally or alternatively, components such as solid state switches or support circuitry can be used to open or reestablish the electrically conductive path. Upon detection of a ground fault, an overcurrent, or an arc fault, or any combination thereof, the circuit interrupter automatically opens electrical continuity along the electrically conductive path between the line phase terminal and the load phase terminal (e.g., breaks the electrically conductive path). The reset portion enables electrical continuity along the electrically conductive path between the line phase terminal and the load phase terminal to be reestablished. The reset portion also enables electrical continuity along the electrically conductive path between the line neutral terminal and the load neutral terminal to be reestablished. In embodiments, the reset portion can transition the reset lockout mechanism to a MID-TRIP position corresponding to a MID-TRIP state of the circuit breaker. Operation of the reset portion and the reset lockout mechanism can occur in conjunction with operation of the circuit interrupter such that the electrically conductive path between the line phase terminal and the load phase terminal cannot be reestablished if the circuit interrupter is not functioning or if a fault is detected.

[0067] Specific embodiments of the present disclosure are described herein with reference to the accompanying drawings. However, it is to be understood that the disclosed embodiments are merely exemplary of the present disclosure and can be embodied in various forms. In order not to obscure the present disclosure with details that are well known in the art, well-known functions or constructions are not described in detail. Therefore, the specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

[0068] For the purpose of promoting an understanding of the principles of the present disclosure, reference will now be made to the particular embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the disclosure is intended by this reference. Alterations and further modifications of the inventive features illustrated herein, and additional applications of the principles of the present disclosure as illustrated herein, which would occur to one ordinarily skilled in the relevant art and having the benefit of the disclosure, are expressly intended to be within the scope of the present disclosure.

[0069] With reference to Figure 1 and Figure 2 , the circuit breaker 100 of the present disclosure generally includes a housing 101 and a reset lock mechanism 10 disposed within the housing 101. The reset lock mechanism 10 is configured to mechanically prevent the circuit breaker 100 from being switched to an ON state when a fault condition occurs or to mechanically enable the circuit breaker 100 to be switched to an ON state (e.g., from an OFF state) when the fault condition does not occur. The housing 101 defines an axis "X" and an axis "Y" that are perpendicular to each other.

[0070] The reset lock mechanism 10 generally includes a rocker arm 300, an armature 400, a solenoid 197, a plunger 208, a detent spring 204, and a link 206. The rocker arm 300 of the reset lock mechanism 10 is partially disposed within the housing 101 of the circuit breaker 100 and is positioned to be in an OFF position (see Figure 15 ) corresponding to an OFF state of the circuit breaker 100 and an ON position (see Figure 25between the OFF and ON states. When the circuit breaker 100 is in the OFF state, the line phase terminal "LINE-P" and the line neutral terminal "LINE-N" are not in electrical communication with the load phase terminal "LOAD-P" and the load neutral terminal "LOAD-N" (the load neutral terminal is not shown) respectively. For the sake of clarity, the line phase terminal "LINE-P" and the line neutral terminal "LINE-N" will be referred to collectively as the line terminal "LINE-T" and, similarly, the load phase terminal "LOAD-P" and the load neutral terminal "LOAD-N" will be referred to collectively as the load terminal "LOAD-T" unless explicitly stated otherwise. Thus, when the circuit breaker 100 is in the OFF state, the line terminal "LINE-T" and the load terminal "LOAD-T" are not in electrical communication. Alternatively, when the circuit breaker 100 is in the ON state, the line terminal "LINE-T" and the load terminal "LOAD-T" are mechanically coupled via a conductive path such that electrical power can be transmitted therebetween.

[0071] The rocker arm 300 extends partially outward through the housing 101 of the circuit breaker 100 and is configured for user access to manually operate the circuit breaker 100. The rocker arm 300 is pivotably coupled to the housing 101 about a pivot pin 311.

[0072] Referring to Figure 3 , the rocker arm 300 has a body 306 that includes a first side 303 and a second side 305. The first side 303 is associated with the OFF position of the rocker arm 300 (when the rocker arm 300 is rotated counterclockwise in Figure 3 toward the housing 101) and, more generally, with the OFF state of the circuit breaker 100. The second side 305 is associated with the ON position of the rocker arm 300 (when the rocker arm 300 is rotated clockwise in Figure 3 toward the housing 101) and, more generally, with the ON state of the circuit breaker 100. The second side 305 of the rocker arm 300 includes a finger 309 that is configured to mechanically engage the switch spring 211 Figure 2 ) to enable the controller "C" of the circuit breaker 100 to determine when a fault condition occurs. The finger 309 is positioned toward the bottom of the second side 305 of the rocker arm 300. The outer surface of the finger 309 includes a switch engagement face 309a that is configured to mechanically engage the switch spring 211. The switch engagement face 309a protrudes outward from the finger 309 and has a curved configuration, but any suitable geometry can also be provided.

[0073] The body 306 of the rocker arm 300 includes a strike arm 308, a lock block 304, and a bottom extension 307 that defines a hole 307a. The strike arm 308 is configured to mechanically engage the armature 400 during a fault condition. An outer surface of the strike arm 308 includes a first cylinder 308b, a second cylinder 308c, a top surface 308d, an armature engagement surface 308a, and a side surface 308e. The armature engagement surface 308a is configured to mechanically engage the armature 400 during a fault condition.

[0074] The lock block 304 is configured to mechanically engage the armature 400 to prevent the rocker arm 300 from moving in the direction "A" until it is determined that the circuit breaker is operating properly. An outer surface of the lock block 304 includes an outer surface with a curved engagement surface 304a, but the curved engagement surface 304a can have any suitable geometry.

[0075] During a portion of the travel of the rocker arm 300, the finger 309 is operably coupled to a switch spring 211 Figure 2 . The switch spring 211 is configured to make electrical contact with a conductive member 212 to enable a controller "C" of the circuit breaker 100 to determine when a fault condition occurs. As Figure 2 shown, the bottom extension 307 of the rocker arm is operably coupled to a first end 206b of a link 206 that has the first end 206b and a second end 206a. The link 206 is disposed in the housing 101 and is configured to enable a conductive path to move between an open configuration and a closed configuration to transition the circuit breaker 100 between an open state and a closed state.

[0076] When the circuit breaker 100 is in the OFF state, Figure 40), the switch engagement face 309a of the rocker 300 pushes against the distal end 211a of the switch spring 211 and prevents the switch spring 211 from making electrical contact with the conductive member 212. When the circuit breaker 100 is not in the OFF state (e.g., in the ON state or the MID-TRIP state), the switch engagement face 309a releases the distal end 211a of the switch spring 211 and enables the switch spring 211 to make electrical contact with the conductive member 212. When the circuit breaker 100 is in the OFF state, the first and second contacts 190, 192 of the contact arm 180 are in the open position (e.g., not in physical contact), such that the reset lockout mechanism 10 is engaged and prevents the conductive path between the line terminal "LINE-T" and the load terminal "LOAD-T". During movement of the rocker 300 from the OFF position to its ON position, the reset lockout mechanism 10 becomes engaged, such that the reset lockout mechanism 10 requires clearance (e.g., it is disengaged) during travel of the rocker 300 in order to enable the rocker 300 to be disposed in its ON position. More particularly, when the reset lockout mechanism 10 is engaged, the circuit breaker 100 is prevented from returning to the ON state until the controller "C" of the circuit breaker 100 determines that the components of the circuit breaker, including the solenoid 197, are functioning properly. Based on the controller "C" determining that no fault conditions exist, the reset lockout mechanism 10 should become disengaged (e.g., cleared) during travel of the rocker 300 (e.g., in the "A" direction) to enter the ON state of the circuit breaker 100.

[0077] The solenoid 197 is configured to be energized by the controller "C". When energized, the solenoid 197 generates a magnetic field sufficient to move the plunger 208 from the first position (see Figure 12 ) to the second position (see Figure 19 ). The plunger 208 extends through the solenoid 197 and partially outward relative to the two sides of the solenoid 197. The plunger 208 defines an axis "Yl". The plunger 208 includes an elongated shaft having a distal portion 210 and a proximal portion 209. The distal portion 210 of the plunger 208 includes a lip 208a configured to interact with a slot 406 defined in the armature 400 (see Figures 5-7 ). The proximal portion 209 of the plunger 208 is configured to act as a stop for the catch 150.

[0078] Continuing with Figure 2 and Figure 4The contact arm 180 includes a contact support section 181 and a pivot support section 183. The contact arm 180 is biased in a first position by a spring 188. The pivot support section 183 has an outer periphery, a portion of which has a circular or substantially circular configuration, but can include any suitable geometric configuration. The pivot support section 183 further defines a slot (not shown) therethrough for receiving a pivot pin 185. The contact arm 180 includes a first contact 190 that is configured to mechanically couple with a second contact 192 that is attached to a housing portion of the housing 101 (e.g., the first contact 190 is movable relative to the housing 101 while the second contact 192 is fixed relative to the housing). When the first and second contacts 190, 192 are mechanically coupled, electrical power can be conducted therebetween. When the rocker 300 is in one of the OFF position or the MID-TRIP position, which corresponds to the OFF state or the MID-TRIP state of the circuit breaker 100, the first and second contacts 190, 192 are not mechanically coupled or are mechanically decoupled.

[0079] The second contact 192 is adjacent to and in electrical communication with the line terminal "LINE-T". When the first and second contacts 190, 192 are mechanically coupled, electrical power can be conducted therebetween. When the rocker 300 is in the OFF position, which corresponds to the OFF state of the circuit breaker 100, the first and second contacts 190, 192 are not mechanically coupled and are not in electrical communication.

[0080] The circuit breaker 100 further includes a pawl 150 that is configured to mechanically engage with the link 206 and the contact arm 180. The pawl 150 includes a proximal portion 151, a distal portion 153, and a plate 152. The distal portion 153 includes a first link portion 155 and a pawl portion 157. The pawl portion 157 can include a curved portion that protrudes outwardly from a surface of the pawl 150. The pawl 150 is biased in a first position by a spring 158.

[0081] To de-latch the latching mechanism 10 and / or to verify that the circuit breaker is functioning properly (e.g., that the circuit is able to sense a fault, that the solenoid 197 is functioning, and / or that the armature 400 is functioning) before returning the circuit breaker 100 to its ON state, electrical power needs to be available to the control circuit or controller "C" of the circuit breaker 100. This is accomplished by supplying electrical power to the controller "C" from the line terminal "LINE-T". Electrical power is supplied from the line side to the DC power supply circuit, and then to the controller "C".

[0082] Additional circuit protection components can also be included, including but not limited to metal oxide varistors (MOVs) and fuses. By powering the controller “C” with power supplied by the line terminal “LINE-T,” the circuit interrupter, including the solenoid 197 and components associated with the solenoid 197, can be tested prior to resetting the circuit breaker 100 (e.g., prior to disengaging the reset lockout mechanism 10 to allow the circuit breaker 100 to return to the ON state) as power can be utilized via the controller power supply. As a result, the load terminal “LOAD-T” and components of the circuit breaker 100 coupled to the load side contact 250 do not receive power during the circuit interrupter test.

[0083] In various embodiments, the circuit of the circuit breaker 100 can include a GFCI integrated circuit (IC) (not shown) and a controller “C.” The GFCI integrated circuit is used to detect ground faults and G / N faults and is electrically coupled to a differential transformer (not shown) and a G / N transformer (not shown). The microprocessor or controller “C” can perform additional functions, such as event recording and self-testing. Event recording can include recording a history of trips (transition to the OFF state), resets (transition to the ON state), manual OFFs, component faults, and any other suitable event. Self-testing performed by the controller “C” enables automatic or selective testing of components of the circuit breaker 100 without user intervention. In embodiments, the controller “C” can temporarily disable firing of the solenoid 197 during self-testing by applying a signal at an output of the controller “C.”

[0084] Additionally, the controller “C” can energize the solenoid 197 to allow the circuit breaker 100 to transition from its OFF state to the ON state. To energize the solenoid 197 when the circuit breaker 100 transitions from the OFF state to its ON state, the controller “C” sends a signal to a silicon controlled rectifier (SCR) (not shown). The solenoid 197 is then energized, causing the plunger 208 to displace to the left (relative to the figures). For further description of the SCR, reference can be made to U.S. Application No. 16 / 322,039, filed January 30, 2019, the disclosure of which is incorporated herein by reference in its entirety.

[0085] State, position, and / or condition information is electronically communicated to the controller “C.” The controller “C” uses this information for event recording (e.g., event recording of trips and / or resets of the circuit breaker 100). The controller “C” can also monitor other portions of the circuit to detect whether various portions of the circuit (e.g., mechanical and / or electrical component faults) have failed, are failing, or will fail at some predetermined predicted failure parameter (e.g., time, usage, etc.). Additionally, the controller “C” communicates with indicators (e.g., LED light assemblies; see FIG. 2) to indicate the status of the circuit breaker 100 (e.g., ON, OFF, test, etc.) and / or the status of the reset lockout mechanism 10 (e.g., engaged, disengaged, etc.). Figure 36) electrical coupling to alert a user of any number of conditions, such as failure, deterioration, malfunction, and / or end of life of the circuit breaker 100 and / or components thereof, detection by the controller "C" of the presence and / or type of fault, and / or any other condition that can compromise the integrity and / or safety standards associated with the conductive path or condition of the circuit breaker 100 or components thereof.

[0086] Figures 5-7 Various views of the armature 400 are shown. The armature 400 is capable of selectively engaging the rocker 300 to trigger the opening of the conductive path between the line phase terminal "LINE-P" and the load phase terminal "LOAD-P" when a fault condition occurs. The armature 400 includes a pivot member 402, a first arm 403, and a second arm 405. The pivot member 402 is configured to enable the armature 400 to pivot about the pivot member 402 between a first position (see Figure 12 ) and a second position (see Figure 13 ). An outer surface of the first arm 403 defines a recess 408. The recess 408 is configured to mechanically engage the curved engagement surface 304a of the rocker 300 during partial movement from the OFF position of the rocker 300 toward the ON position to prevent the rocker 300 from rotating in the direction "A". The second arm 405 is configured to mechanically engage the plunger 208. An outer surface of the second arm 405 includes an engagement surface 404 and defines a slot 406 therein. The slot 406 is configured to receive the plunger 208. The engagement surface 404 is configured to be displaced by the plunger 208 such that if the circuit breaker 100 is functioning properly (see Figure 10 ), the armature 400 pivots to the second position.

[0087] Figures 8-14 Operation of the reset lockout mechanism 10 according to the present disclosure is shown. Referring to Figure 9 , when a user depresses the rocker 300 from its OFF position toward its ON position, the switch spring 211 (see Figure 2 ) and the conductive member 212 (see Figure 2 ) make electrical contact, which is sensed by the controller "C", resulting in the controller "C" running a fault test (e.g., a simulated fault) and determining whether a fault is detected. If the circuit breaker 100 is not functioning, the solenoid 197 remains de-energized and the armature 400 remains in the first position (see Figure 9 ). When the armature 400 is in the first position, the armature recess 408 and the curved engagement surface 304a interact to provide a mechanical stop and prevent movement of the rocker 300 from converting the circuit breaker 100 to its ON state.

[0088] Referring to Figure 10 and Figure 11In the event that the controller "C" does not detect a fault present (e.g., the circuit breaker is not working), the solenoid 197 is configured to move the plunger 208 between the first position and the second position. The plunger 208 includes a lip 208a. The lip 208a interacts with the engagement face 404 of the armature 400 and pivots the armature 400 to the second position, and the rocker arm 300 path is unobstructed (e.g., the armature recess 408 and curved engagement face 304a are disengaged). The circuit breaker 100 can then fully transition to the ON state.

[0089] Referring to Figure 12 and 13 , the detent spring 204 (which can be a torsion spring) is configured to act as a detent and hold the armature 400 in place by providing a resistance to the second arm 405 of the armature 400 when the plunger 208 is in the second position. The detent spring 204 is further configured to hold the armature 400 in place by providing a resistance to the second arm 405 of the armature 400 when the plunger 208 is in the first position. The detent spring 204 includes a leg 204a. The leg 204a can be curved to provide a resistance to the pivoting of the second arm 405 of the armature 400. For example, as shown in Figure 13 , the armature 400 is in the first position such that the movement of the rocker arm 300 is blocked by the armature 400 and the circuit breaker 100 cannot reset to its ON state. As shown in Figure 14 , in the second position of the armature 400, the movement of the rocker arm 300 is free and the circuit breaker 100 can reset to its ON state.

[0090] Referring to Figures 15-34 , during the counterclockwise rotation of the rocker arm 300 to its OFF position, the armature engagement face 308a strikes the first arm 403 of the armature 400, and the armature 400 is forced back to the first position.

[0091] Figure 15 is a progression view of the reset lockout mechanism 10 according to the present disclosure. The reset lockout mechanism 10 is configured to generally transition between an engaged position and a disengaged position. Further, in the engaged position, the circuit breaker 100 can be in transition from its OFF state to its ON state. When the reset lockout mechanism 10 is in its engaged position, the first and second contacts 190, 192 of the contact arm 180 are held in a disengaged position (e.g., not in contact with each other). Likewise, when the reset lockout mechanism 10 is in the engaged position (the circuit breaker 100 is in transition from the OFF state to the ON state), the circuit breaker 100 cannot reset, e.g., the conductive path cannot close, unless the circuit interrupter is operable.

[0092] Initially, in Figures 16-17In the middle, the rocker 300 is in the OFF position and the plunger 208 is in the first position. The switch engagement face 309a of the rocker 300 pushes against the distal end 21 la of the switch spring 211 and prevents the switch spring 211 from making electrical contact with the conductive member 212. The circuit breaker 100 is shown before a force is applied along direction "A" to the second side 305 of the rocker 300. The force on the second side 305 of the rocker 300 is applied by a user to transition the circuit breaker 100 from the OFF state to the ON state. The applied force causes the link 206 to move such that the link 206 transfers the applied force downward (and left in the figure) to the pawl 150 and the contact arm 180. When the downward force is applied to the link 206, the link 206 rotates the pawl 150 and the contact arm 180 clockwise.

[0093] Referring to Figures 16-18 , the user continues to apply a force along direction "A" to the second side 105 of the rocker 300 in order to transition the circuit breaker 100 to its ON state. The force applied to the second side 105 of the rocker 300 causes the link 206 to continue to rotate the pawl 150 and the contact arm 180.

[0094] As the rocker 300 rotates toward its ON position (see Figure 18 ), the switch engagement face 309a of the rocker 300 releases the distal end 21 la of the switch spring 211 and enables the switch spring 211 to make electrical contact with the conductive member 212. The controller "C" performs a self-test and determines that no fault conditions exist (e.g., the circuit breaker 100 is not working), so the solenoid 197 is energized and moves the plunger 208 to the second position (see Figure 19 and Figure 18 ).

[0095] The first end 206b of the link 206 is coupled to and mechanically engaged by the bottom extension 307 of the rocker 300. The pawl 150 is pivotably coupled to the housing 101 and mechanically cooperates with the contact arm 180. The contact arm 180 is pivotably connected to the housing 101 at the same location as the pawl 150. The contact arm 180 and the pawl 150 are configured to mechanically cooperate to enable the first and second contacts 190, 192 of the contact arm 180 to make electrical contact during the ON state of the circuit breaker 100. The contact arm 180 and the pawl 150 define a slot 184 at the first position of the contact arm 180 and the first position of the pawl 150. The second end 206a of the link 206 slidably engages the slot 184 and causes the contact arm 180 and the pawl 150 to rotate clockwise.

[0096] With continuing reference to Figures 20-25 and 19, the lip 208a of the plunger 208 interacts with the slot 406 in the armature 400 and pivots the armature 400 to the second position, the locking block 304 and armature recess 408 disengage, and the path of the rocker arm 300 is unobstructed. The circuit breaker 100 can then be transitioned to its ON state. The brake spring 204 is configured to act as a brake and to hold the armature 400 in place by providing resistance to the armature 400 at the engagement face 404 when the armature 400 is in the second position.

[0097] Referring to Figures 26-34 As the rocker arm 300 continues to rotate to its ON position, the rocker arm 300 continues to rotate the contact arm 180 and the pawl 150 clockwise, thereby creating a conductive path between the line phase terminal "LINE-P" and the load phase terminal "LOAD-P". Before the rocker arm 300 can go to its ON position, the rocker arm 300 must go from its MID-TRIP position to the OFF position and then to its ON position to disengage the reset lockout mechanism 10. If the user attempts to rotate the rocker arm 300 to its ON position, the rocker arm 300 is prevented from transitioning the circuit breaker 100 to its ON state (due to the linkage 206 disengaging from the pawl 150 and the contact arm 180) until the reset lockout mechanism 10 is reset.

[0098] Referring to Figure 35 , the controller "C" detects the presence of a fault and de-energizes the solenoid 197. A G / N fault occurs, for example, when a connection exists between the load neutral conductor and the ground conductor. The presence of a G / N fault occurs when both the neutral conductor and the ground conductor are connected on the line side and the load side of the differential transformer (not shown) and the G / N transformer (not shown). This creates a conductive loop that then magnetically couples the differential transformer (not shown) and the G / N transformer (not shown) together. When this occurs, the differential transformer (not shown) and the G / N transformer (not shown) create positive feedback that causes the amplifier of the GFCI integrated circuit (IC) (not shown) coupled to the sensing circuit to oscillate. When the amplifier oscillates, the sensing circuit interprets this as a high frequency ground fault and engages the circuit interrupting portion. The solenoid 197 axially / linearly moves the plunger 208 from the first position to the second position. The plunger 208 strikes the plate 152, which rotates the pawl 150 counterclockwise, which causes the pawl 150 and the contact arm 180 to disengage from the linkage 206. As the pawl 150 and the contact arm 180 continue to rotate counterclockwise, the first and second contacts 190, 192 of the contact arm 180 mechanically separate.

[0099] As the rocker arm 300 continues to rotate toward its OFF position, the armature engagement face 308a of the rocker arm 300 mechanically engages the armature 400. The armature 400 rotates to its first position. The proximal portion 209 of the plunger 208 pushes against the plate 152 of the pawl 150 and acts as a stop.

[0100] Reference is now made to Figure 35 , a flowchart illustrating the operation of the circuit breaker 100 is provided. More particularly, Figure 36 A process 700 performed by the controller "C" is shown. Initially, the controller "C" receives power from the line terminal "LINE-T" via the rectifier and voltage regulator circuit (step 750). The controller "C" receives information associated with the various components of the circuit breaker 100, which is monitored by the controller "C" (step 752). The information received by the controller "C" can include voltage measurements taken at the line terminal "LINE-T" and the load terminal "LOAD-T" as well as current measurements taken at the transformer "T" for determining whether there is a current imbalance, low current, high current, etc. More particularly, the current measurements taken at the transformer "T" enable the controller "C" to determine whether there is one or more predetermined conditions or faults, such as, but not limited to, a ground fault, an arc fault, a shared neutral condition, an overcurrent condition, etc. The controller "C" can update an event log with the received information as well as the presence or occurrence of any predetermined conditions or faults. Additionally, the controller "C" can determine whether the circuit breaker 100 is in its MID-TRIP state or its ON state based on the voltage measured at the line terminal "LINE-T" and the load terminal "LOAD-T".

[0101] If the current measurements between the line terminal "LINE-T" and the load terminal "LOAD-T" indicate that the current imbalance or change exceeds a predetermined threshold, the controller "C" can determine that there is a ground fault or G / N fault condition. Additionally, the controller "C" can receive a sensor signal indicative of an arc fault. For example, the high frequency transformer and / or other components / circuitry of the transformer assembly can provide a sensor signal indicative of an arc fault.

[0102] Upon determining that there is any of the faults described throughout this disclosure (step 754), the controller "C" further determines the state of the circuit breaker 100 (e.g., ON or OFF) (step 758). In the event that the controller "C" determines that there is a fault and the circuit breaker 100 is in the OFF state (step 758), the circuit interrupting portion is engaged or becomes engaged (step 762). Alternatively, if no fault is detected and the controller "C" determines that the circuit breaker 100 is in the ON state (step 756), the controller "C" can further determine whether there is a predetermined condition that requires the circuit breaker 100 to transition to the OFF state. Upon detection of a fault (or predetermined condition), the circuit breaker 100 can display an indication to the user indicating the presence or type of condition or fault when the circuit breaker is in the OFF state (see Figure 2 ) to the user.

[0103] If a fault (or predetermined condition) is detected (step 754) and it is determined that circuit breaker 100 is not in the OFF state, controller "C" sends a control signal to energize a circuit interrupter, which may be solenoid 197 (step 762). Once solenoid 197 receives the control signal from controller "C", it generates a magnetic field, thereby pulling plunger 208 from a first position to a second position. Pulling plunger 208 to the second position causes circuit breaker 100 to switch from its ON state to its OFF state. Therefore, when a user attempts to switch circuit breaker 100 to the ON state, controller "C" must re-energize solenoid 197 to switch circuit breaker 100 to the ON state once the fault is no longer detected (step 754).

[0104] If no fault (or predetermined condition) is detected (step 754), controller "C" determines the state of circuit breaker 100 (e.g., OFF or ON state) (step 756). If controller "C" determines that the circuit breaker is in the OFF state, controller "C" sends a control signal to the solenoid to pull plunger 208 to the first position, thereby switching circuit breaker 100 to the MID-TRIP state (760). Once circuit breaker 100 is in the MID-TRIP state, the force applied to the first side 303 switches circuit breaker 100 to the OFF state. When the circuit breaker is in the OFF state, along direction "A" ( Figure 34 When force is applied to the second side 105 of the rocker arm 300, the reset locking mechanism 10 is released as the circuit breaker 100 is switched to the ON state. Figure 36 As shown, when controller "C" determines the presence of a fault (step 754) and switches circuit breaker 100 to the OFF state, the MID-TRIP state, or keeps it closed, process 700 is repeated to provide analysis of the state of circuit breaker 100. It is noteworthy that when circuit breaker 100 is switched to the MID-TRIP state, circuit breaker 100 cannot switch back to the ON state until it is first switched to the OFF state.

[0105] Reference Figure 1 The diagram shows a front view of a circuit breaker 500, which includes one or more indicators 503, such as a first indicator 503a and a second indicator 503b. The first and second indicators 503a, 503b, and the rocker arm window 502 are configured to output color signals indicating various possible operating states of the circuit breaker 500. This is based on the reset locking mechanism 10 of the circuit breaker 500. Figure 36 Whether the rocker arm is in the ON or OFF position, the rocker window 502 displays a binary signal corresponding to the position of the reset locking mechanism 10. Additionally, the first and second indicators 503a and 503b can display various color signals indicating relevant faults detected by the controller.

[0106] More particularly, Figure 37 A circuit breaker in the form of a GFCI circuit breaker is shown having two LED indicators 503. Various operating states thereof are visually indicated by a combination of electronic elements (e.g., LEDs) and / or mechanical elements. For states indicated by mechanical elements, this can be indicated by the position of its rocker arm and / or by color indicia made visible through a window 502 defined in the center portion of the rocker arm. More particularly, in the case of mechanical indication, there can be multiple color indicia, one of which is visible to the user depending on the position of the rocker arm 510. For example, when in the OFF position, the rocker arm 510 will be arranged to expose the same color as the entire housing (e.g., white or black) through the window 502. Alternatively, a different color can be used to indicate the OFF position of the rocker arm. When in its ON position, the rocker arm 510 will be arranged so that a green color can be exposed through the window 502. When in the MID-TRIP position, the rocker arm 510 will be arranged so that a red color is exposed through the window 502.

[0107] In addition to the mechanical indication provided by the rocker arm 510, one or more indicators 503 can also be included. For example, a GFCI circuit breaker can have a first indicator 503a which can be in the form of a first LED arranged in a first position; an AFCI circuit breaker can have a second indicator 503b which can be in the form of a second LED in a second position; and combinations thereof, an AFCI / GFCI circuit breaker can include first and second indicators 503a, 503b (e.g., LEDs) in both the first and second positions, respectively. By positioning the indicators 503 in the first position, the second position, or both the first and second positions based on the type of protection provided by the circuit breaker (GFCI, AFCI, and AFCI / GFCI, respectively), a more intuitive user interface 500 is provided. This user interface 500 can help the user differentiate between different circuits when viewing a plurality of circuit breakers arranged along a circuit panel (not shown) as the indicators will be aligned.

[0108] In the case of a GFCI circuit breaker, the various states can be indicated as follows.

[0109]

[0110]

[0111] In the case of an AFCI circuit breaker, the various states can be indicated as follows.

[0112]

[0113] In the case of an AFCI / GFCI circuit breaker, various states can be indicated as follows.

[0114]

[0115]

[0116] The various states indicated by the window 502 and / or GFCI and AFCI indicators 503 can vary depending on the type of fault that the circuit breaker is able to identify, the level of display used to identify a particular fault, and the like.

[0117] Circuit breakers can employ tripping mechanisms, including but not limited to solenoids, bimetallic components, and / or hydraulic components. In the case of a tripping mechanism that includes a bimetallic component, the speed at which it trips is directly proportional to the amount of overcurrent flowing therethrough due to the heat generated by the overcurrent. This is commonly referred to as the trip time curve of the circuit breaker. Regulatory bodies, such as the Underwriters Laboratories (UL), place limits on the amount of time a circuit breaker takes to trip at a given current level. However, trip time curves vary from circuit breaker to circuit breaker depending on the application and requirements associated with a particular installation. This variation in trip time curves is acceptable as long as the defined limits set by the applicable regulatory body are not exceeded.

[0118] Other tripping mechanisms, such as solenoids, can trip nearly instantaneously once a given current threshold is reached. With such mechanisms, it can be beneficial to introduce a delay in tripping based on the current level to replicate the trip time curve.

[0119] In certain embodiments, a circuit breaker can include a mechanism that introduces a delay in tripping based on the detected current level to replicate the trip time curve. These embodiments are similar to the other embodiments described above, except that they include an additional current sensor to measure the current flowing through the branch circuit (not shown). The controller of the circuit breaker monitors the current level detected by the current sensor, and when the controller detects a fault or overcurrent, the controller can set a delay time before it will cause the circuit breaker to trip based on the current level sensed by the current sensor. The trip time curve can be modified by the controller based on the desired operation of the circuit breaker. For example, the circuit breaker can be programmed to adapt one or more of a plurality of trip time curves to any given application. Additionally, the trip time curve can be customized or modified for a user according to the user's requirements while still meeting the defined limits set by the applicable regulatory body.

[0120] Referring to Figure 38 and Figure 2 , a dual pole circuit breaker is shown in accordance with aspects of the present disclosure. In various embodiments, the dual pole circuit breaker 3600 can include features from Figures 37-39a single reset lockout mechanism 10 to lock both breakers of the double pole circuit breaker 3600 during a fault condition.

[0121] Referring to Figure 37 , a rocker assembly 300a for a double pole circuit breaker 3600 (see, e.g., Figure 38 and ​ ) is shown. The rocker assembly 300a includes a rocker 300 and a rocker link 3920 that extends laterally from the rocker 300 and is coupled to the rocker 300 via a pin 3928 such that the rocker link 3920 is able to move with the rocker 300 as the rocker 300 moves between its ON and OFF positions. The rocker link 3920 is configured to transmit mechanical movement of the rocker 300 to a second link 3206 of the double pole circuit breaker 3600 to selectively position the double pole circuit breaker 3600 between its ON and OFF states. The rocker link 3920 includes an arm 3921 having a first end portion 3922, a middle portion 3924, and a second end portion 3930. The first end portion 3922 defines a first hole 3922a that receives a first pin 3923 supported by the double pole circuit breaker 3600 to enable the rocker link 3920 to pivot relative to a housing 3601 of the double pole circuit breaker 3600. The middle portion 3924 defines a recess 3924a that can have a slot shape and includes a portion that defines an opening 3924b. The opening 3924b is configured to receive a pin 3928 that extends from the rocker 300. The second end portion 3930 defines an end hole 3930a that is configured to be coupled to the second link 3206 of the double pole circuit breaker 3600.

[0122] Those skilled in the art will understand that the structures and methods specifically described herein and shown in the drawings are merely exemplary and illustrative of certain embodiments and that the description, disclosure and drawings should be construed as only examples of particular embodiments. This disclosure is not limited to the precise embodiments described and that various other changes and modifications can be made therein by those skilled in the art without departing from the scope or spirit of the disclosure. Further, elements and features shown or described in connection with certain embodiments can be combined with elements and features of certain other embodiments without departing from the scope of the disclosure, and such modifications and variations are intended to be included within the scope of the disclosure. Thus, the subject matter of this disclosure is not limited to the specific embodiments described and shown.

Claims

1. A circuit breaker, comprising: Line phase terminals; Load phase terminals; Line neutral terminal; A conductive path is formed between the line phase terminal and the load phase terminal, the conductive path having an open structure and a closed structure; A link configured to move the conductive path between the open configuration and the closed configuration; and A reset locking mechanism configured to prevent the conductive path from moving into the closed structure when a predetermined condition exists, the reset locking mechanism comprising: A rocker arm that can selectively engage with the link, the rocker arm being configured to move the link between an open position and a closed position; An armature, when the predetermined condition is present, is selectively engaged with the rocker arm to maintain the conductive path in the disconnected configuration; and A solenoid including a plunger, the solenoid being configured to move the plunger between a first position and a second position, the plunger being operatively coupled to the armature. The rocker arm includes a first engagement surface configured to engage the armature, and The armature includes: a first arm having an outer surface defining a recess configured to contact a first engagement surface of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to the ON state of the circuit breaker; and a second arm defining an armature slot, and the plunger including a lip configured to engage the armature slot.

2. The circuit breaker according to claim 1, wherein, The predetermined condition includes a ground fault between the load phase terminal and the line neutral terminal.

3. The circuit breaker according to claim 1, wherein, The reset locking mechanism also includes a spring configured to act as a brake and hold the armature in place.

4. A circuit breaker, comprising: Line phase terminals; Load phase terminals; Line neutral terminal; A conductive path is formed between the line phase terminal and the load phase terminal, the conductive path having an open structure and a closed structure; A link configured to move the conductive path between the open configuration and the closed configuration; and A reset locking mechanism configured to prevent the conductive path from moving into the closed structure when a predetermined condition exists, the reset locking mechanism comprising: A rocker arm that can selectively engage with the link, the rocker arm being configured to move the link between an open position and a closed position; An armature, when the predetermined condition is present, is selectively engaged with the rocker arm to maintain the conductive path in the disconnected configuration; and A solenoid including a plunger, the solenoid being configured to move the plunger between a first position and a second position, the plunger being operatively coupled to the armature. The rocker arm includes: a first engagement surface configured to engage the armature; and a second engagement surface configured to strike the armature when the rocker arm returns to a position corresponding to the OFF state of the circuit breaker. The armature includes a first arm with an outer surface defining a recess configured to contact a first engagement surface of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to the ON state of the circuit breaker.

5. The circuit breaker according to claim 4, wherein, The predetermined condition includes a ground fault between the load phase terminal and the line neutral terminal.

6. The circuit breaker according to claim 4, wherein, The rocker arm is movable between a first position, an intermediate trip position, and a second position. In the first position, the conductive path is in the open configuration corresponding to the OFF state of the circuit breaker. In the intermediate trip position, a fault or overcurrent condition occurs. In the second position, the conductive path is in the closed configuration corresponding to the ON state of the circuit breaker.

7. The circuit breaker according to claim 6, further comprising a stop, wherein: At least a portion of the conductive path further includes a contact arm; The lever and the contact arm have a first spatial arrangement and a second spatial arrangement, wherein: When in the first spatial arrangement, the link is prevented from engaging with the latch and the contact arm to move the conductive path from the open configuration to the closed configuration; When in the second spatial arrangement, the linkage is capable of engaging the latch and the contact arm to move the conductive path from the open configuration to the closed configuration; and When the rocker arm is in the intermediate trip position, the lever and the contact arm are arranged in the first space.

8. The circuit breaker according to claim 7, wherein, The first end of the link is operatively coupled to the bottom extension of the rocker arm and associated with the line terminal, such that movement of the link is configured to selectively move the conductive path between the open and closed configurations, the link having a second end movably received within a link slot defined by a stop and a contact arm.

9. A reset locking mechanism for a circuit breaker, the reset locking mechanism comprising: A link, the link being positioned to move between an open position and a closed position; A rocker arm that can selectively engage with the connecting rod; An armature that can selectively engage with the rocker arm; Solenoid; and A plunger, supported by the solenoid and operably coupled to the armature, is movable between a first position and a second position. The rocker arm includes a mating surface configured to engage the armature, and The armature includes: a first arm having an outer surface defining a recess configured to contact the engagement surface of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to the ON state of the circuit breaker; and a second arm defining an armature slot, and the plunger including a lip configured to engage the armature slot.

10. The reset locking mechanism according to claim 9, wherein, A conductive path is formed between the line phase terminals and the load phase terminals of the circuit breaker, the conductive path having an open configuration and a closed configuration; and wherein the reset locking mechanism is configured to prevent the conductive path from moving to the closed configuration when a predetermined condition exists.

11. The reset locking mechanism according to claim 10, wherein, The predetermined condition includes a ground fault between the load phase terminal and the line neutral terminal of the circuit breaker.

12. The reset locking mechanism according to claim 9, wherein, The solenoid is configured to move the plunger between the first position and the second position.

13. The reset locking mechanism according to claim 9, wherein, The reset locking mechanism also includes a spring configured to act as a brake and hold the armature in place.

14. A circuit breaker, comprising: Line phase terminals; Load phase terminals; Line neutral terminal; A conductive path is formed between the line phase terminal and the load phase terminal, the conductive path having an open structure and a closed structure; A link configured to move the conductive path between the open configuration and the closed configuration; A rocker arm that can selectively engage with the link, the rocker arm being configured to move the link between an open position and a closed position; and The armature, when a predetermined condition exists, can selectively engage with the rocker arm to prevent the conductive path from being in the closed configuration. The circuit breaker further includes a solenoid supporting a plunger, the solenoid being configured to move the plunger between a first position and a second position. The plunger includes a distal portion and a proximal portion, the proximal portion being configured to provide a mechanical stop, and the distal portion of the plunger being operatively connected to the armature. The rocker arm includes a mating surface configured to engage the armature, and The armature includes: a first arm having an outer surface defining a recess configured to contact the engagement surface of the rocker arm to provide a mechanical stop and prevent the rocker arm from rotating to a position corresponding to the ON state of the circuit breaker; and a second arm defining an armature slot, and the plunger including a lip configured to engage the armature slot.

15. The circuit breaker according to claim 14, wherein, The predetermined condition includes a ground fault between the load phase terminal and the line neutral terminal.

16. The circuit breaker according to claim 14, wherein, The circuit breaker also includes a spring configured to act as a brake and hold the armature in place.

17. The circuit breaker according to claim 14, wherein, The rocker arm includes an armature engagement surface, wherein the armature engagement surface is configured to strike the armature when the rocker arm returns to a position corresponding to the OFF state of the circuit breaker.

18. The circuit breaker according to claim 17, wherein, The rocker arm is movable between a first position, an intermediate trip position, and a second position. In the first position, the conductive path is in the open configuration corresponding to the OFF state of the circuit breaker. In the intermediate trip position, a fault or overcurrent condition occurs. In the second position, the conductive path is in the closed configuration corresponding to the ON state of the circuit breaker.

19. The circuit breaker according to claim 18, wherein, The circuit breaker also includes a stop, wherein... At least a portion of the conductive path further includes a contact arm; The lever and the contact arm have a first spatial arrangement and a second spatial arrangement, wherein: When in the first spatial arrangement, the linkage is prevented from engaging with the stop and the contact arm to move the conductive path from the open configuration to the closed configuration; and When in the second spatial arrangement, the linkage is capable of engaging the latch and the contact arm to move the conductive path from the open configuration to the closed configuration; and When the rocker arm is in the intermediate trip position, the lever and the contact arm are arranged in the first space.

20. The circuit breaker according to claim 19, wherein, The first end of the link is operatively coupled to the bottom extension of the rocker arm and associated with the line terminal, such that movement of the link is configured to selectively move the conductive path between the open and closed configurations, the link having a second end movably received within a link slot defined by a stop and a contact arm.

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