WO2018114739A1

WO2018114739A1 - Circuit breaker with tripping functionality

Info

Publication number: WO2018114739A1
Application number: PCT/EP2017/083200
Authority: WO
Inventors: Naresh KODELA; Ranjit Jadhav; Vinod Kumar MANNARU; Hari KONKA
Original assignee: Eaton Industries (Austria) Gmbh
Priority date: 2016-12-20
Filing date: 2017-12-18
Publication date: 2018-06-28

Abstract

A circuit breaker (1) with tripping functionality comprises a fixed contact (10) and a breaker element (20) comprising a movable element (100, 200) including a movable contact (110, 210) that can be moved between an open and closed state. The circuit breaker (1) comprises a casing (40) comprising a slot (41), wherein the breaker element (20) is movably arranged in the slot (41) of the casing between a first and a second position (A, B). The circuit breaker (1) is operated in a manually switchable state in which the movable contact (110, 210) is movable by an actuation element (30) between the open and closed state, when the breaker element (20) is arranged at the first position (A) of the slot (41) of the casing (40). The circuit breaker (1) is operated in the tripped state in which the movable contact (110, 210) is switched in the open state without operating the actuation element (30), when the breaker element (20) is arranged at a second position (B) of the slot (41) of the casing (40).

Description

Description CIRCUIT BREAKER WITH TRIPPING FUNCTIONALITY Technical Field

The disclosure relates to a circuit breaker with a tripping functionality that allows to operate the circuit breaker in a tripped operation state in which a movable contact is switched in an open state without operating an actuation element . Background

A circuit breaker is an automatically operated electrical switch that is used to protect an electrical circuit from damage caused by the occurrence of a short-circuit or by a large current that is lower than the current in the case of the short-circuit but large enough to damage the electrical circuit. The circuit breaker comprises a movable contact that may be moved in a closed and an open state. In the closed state, the movable contact is in electrical contact with a fixed contact of the circuit breaker so that the circuit breaker allows a current flow from an input terminal to an output terminal of the circuit breaker. In an open state of the circuit breaker, the movable contact is separated from the fixed contact so that the flow of current between the input and output terminals of the circuit breaker is

interrupted .

Conventional circuit breaker mechanisms facilitate multiple control functions. The circuit breaker comprises an actuation element, for example, a rotatable knob that allows to switch the circuit breaker from the open state in which the moving contact is isolated from the fixed contact to the closed state in which the moving contact is electrically connected to the fixed contact and vice versa. In the case of a short- circuit in the electrical circuit connected to the circuit breaker, a tripping operation is performed to electrically isolate the moving contact from the fixed contact without being necessary to manually operate the actuation element. For this purpose a solenoid tripping actuator can

electrically isolate the moving contact from the fixed contact. The high current flowing through a solenoid excites a magnetic field by which an anchor of the solenoid tripping actuator hits against the moving contact to separate the moving contact from the fixed contact. After the short- circuit current is switched off, the mechanism has to set back from the tripped operation state in the manually

switchable operation state in which the moving contact can be manually moved by means of the actuation element. A circuit breaker rigid link mechanism acts like a four-bar mechanism during a manual opening and closing operation and is converted into a five-bar mechanism during tripping and an optional re-latching operation in which the movable contact is re-latched with the actuation element. These mechanisms are complex with multiple rigid links, springs and joints. A higher number of components is directly related to higher assembly costs and lower reliability of the product.

Compliant-based structures help the integration of these multiple functions into fewer parts and simplifies the mechanism. For realizing the tripping operation of a circuit breaker, the compliant-based solution should be able to assist for the moving contact to open and the mechanism should lose its bi-stability so that the moving contact can no longer be moved between the open and closed state by manually operating the actuation element, such as a rotating kno .

For rigid links the above-mentioned two functions during the tripping operation happen by conversion of the four-bar mechanism to the five-bar mechanism. For a monolithic

compliant solution this transformation can be complex, because the design will require multiple thin

sections/flexural hinges in the mechanism. Thin

sections/flexural hinges are high-stress regions which can carry a smaller load and can have reliability challenges.

It is desirable to provide a circuit breaker with a tripping functionality that allows to switch the circuit breaker from the manually operation state to the tripped operation state in an easy and reliable manner.

Summary This object, which will be disclosed in detail hereinafter, is achieved by a circuit breaker as specified in claims 1 and 16.

According to a possible embodiment, the circuit breaker comprises a fixed contact and a breaker element comprising a movable element including a movable contact. The breaker element is configured to move the movable element so that the movable contact is moved between an open and closed state of the circuit breaker. In the open state, the movable contact is isolated from the fixed contact, and, in the closed state, the movable contact is electrically connected to the fixed contact. The circuit breaker further comprises an actuation element to manually switch the circuit breaker between the open and closed state. The circuit breaker further comprises a casing comprising a slot. The breaker element is movably arranged in the slot of the casing between a first and a second position. The circuit breaker is operated in a manually switchable state in which the movable contact is movable by the actuation element between the open and closed state, when the breaker element is arranged at the first position of the slot of the casing. The circuit breaker is operated in the tripped state in which the movable contact is switched in the open state without operating the actuation element, when the breaker element is arranged at a second position of the slot of the casing.

The breaker element comprises a guiding pin that is rotatably arranged in the slot of the casing so that the movable contact can be manually switched between the open and closed state by means of the actuation element. When operating the circuit breaker in the manually switchable state, the guiding pin represents a revolute joint around which the movable element, and thus the movable contact, is rotated when the movable contact is switched between the open and closed state. In the manually switchable operation state, the guiding pin is placed at a first position of the slot of the casing . The guiding pin may be changed to a prismatic joint when the operation state of the circuit breaker is changed from the manually switchable state to the tripped state. The guiding pin is configured as a prismatic joint during the movement from the first to the second position of the slot to realize the tripped operation state of the circuit breaker.

The idea of using an interchangeable revolute and prismatic joint to operate the circuit breaker in the manually

switchable state and to change the operating state from the manually switchable operation state to the tripped operation state can be used for compliant link mechanisms as well as for rigid link mechanisms, where it can simplify the

mechanism. According to another embodiment of the circuit breaker, the circuit breaker comprises a fixed contact and a breaker element comprising a movable element including a movable contact. The breaker element is configured to move the movable element so that the movable contact is moved between an open and closed state, wherein, in the open state, the movable contact is isolated from the fixed contact, and, in the closed state, the movable contact is electrically

connected to the fixed contact. The circuit breaker further comprises an actuation element to manually switch the circuit breaker between the open and closed state.

The breaker element comprises a coupling element to provide a force transmission from the actuation element to the movable element to move the movable contact between the open and closed state. The movable element is engagable to the

coupling element. The breaker element is configured to be operated in a switchable state in which the movable contact is moved by the actuation element between the open and closed state, when the movable element engages the coupling element. The circuit breaker is configured to be operated in the tripped state in which the movable contact is switched in the open state without operating the actuation element, when the movable element disengages the coupling element. Additional features and advantages are set forth in the

Detailed Description that follows, and in part will be readily apparent to those skilled in the art from the

description or recognized by practicing the embodiments as described in the written description and claims hereof, as well as the appended drawings. It is to be understood that both the foregoing general description and the following Detailed Description are merely exemplary, and are intended to provide an overview or framework to understand the nature and character of the claims.

Brief Description of the Drawings

The accompanying Figures are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate several embodiments, and together with the Detailed Description serve to explain principles and operations of the various

embodiments. As such, the disclosure will become more fully understood from the following Detailed Description, taken in conjunction with the accompanying Figures, in which:

Figure 1A shows an embodiment of a circuit breaker in a manually switchable state with an open contact according to a spring loaded pin mechanism;

Figure IB shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the spring loaded pin mechanism; Figure 1C shows an enlarged view of the spring loaded pin concept of the circuit breaker in the manually switchable operation state;

Figure 2A shows the circuit breaker operated in the tripped state according to the spring loaded pin mechanism;

Figure 2B shows an enlarged view of the spring loaded pin concept of the circuit breaker in the tripped operation state ; Figure 3A shows an embodiment of a circuit breaker in a manually switchable state with an open contact according to a modified spring loaded pin mechanism; Figure 3B shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the modified spring loaded pin mechanism;

Figure 3C shows an enlarged view of the modified spring loaded pin concept of the circuit breaker in the manually switchable operation state;

Figure 4A shows the circuit breaker operated in the tripped state according to the modified spring loaded pin mechanism;

Figure 4B shows an enlarged view of the modified spring loaded pin concept of the circuit breaker in the tripped operation state; Figure 5A shows a third embodiment of a circuit breaker in a manually switchable state with the movable contact being in an open state according to a concept using a spring loaded ball plunger mechanism; Figure 5B shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the spring loaded ball plunger mechanism;

Figure 5C shows an enlarged view of the spring loaded ball plunger mechanism in the manually switchable operation state;

Figure 5D shows the circuit breaker operated in the tripped state according to the spring loaded ball plunger mechanism; Figure 5E shows an enlarged view of the spring loaded ball plunger concept of the circuit breaker in the tripped

operation state; Figure 6A shows a fourth embodiment of a circuit breaker in a manually switchable state with the movable contact being in an open state according to a concept using a spring loaded pin mechanism; Figure 6B shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the spring loaded pin mechanism;

Figure 6C shows an enlarged view of the spring loaded ball pin mechanism in the manually switchable operation state;

Figure 6D shows the circuit breaker operated in the tripped state according to the spring loaded pin mechanism; Figure 6E shows an enlarged view of the spring loaded pin concept of the circuit breaker in the tripped operation state ;

Figure 7A shows a locking element of a circuit breaker being embodied as a spring loaded sliding latch;

Figure 7B shows a fifth embodiment of a circuit breaker in a manually switchable state with the movable contact being in an open state according to a concept using a spring loaded sliding latch;

Figure 7C shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the spring loaded sliding latch mechanism; Figure 7D shows the circuit breaker operated in the tripped state according to the spring loaded sliding latch mechanism;

Figure 8A shows a sixth embodiment of a circuit breaker in a manually switchable state with the movable contact being in an open state according to a concept using a rotatable latch;

Figure 8B shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the rotatable latch mechanism;

Figure 8C shows the circuit breaker operated in the tripped state according to the rotatable latch mechanism; Figure 9A shows a locking element of a circuit breaker being embodied as a spring loaded ring-shaped latch;

Figure 9B shows a seventh embodiment of a circuit breaker in a manually switchable state with the movable contact being in an open state according to a concept using a spring loaded ring-shaped latch;

Figure 9C shows the circuit breaker operated in the manually switchable state with the movable contact being in the closed state according to the spring loaded ring-shaped latch mechanism;

Figure 9D shows the circuit breaker operated in the tripped state according to the spring loaded ring-shaped latch mechanism;

Figure 10A shows a breaker element of an eight embodiment of a circuit breaker comprising a movable and a coupling element in a latched configuration; Figure 10B shows the eight embodiment of the circuit breaker comprising a movable element and a coupling element in a manually switchable state in an open configuration; Figure IOC shows the eight embodiment of the circuit breaker comprising a movable element and a coupling element in a manually switchable state in a closed configuration;

Figure 10D shows a breaker element of the eight embodiment of a circuit breaker comprising a movable and a coupling element in an unlatched configuration;

Figure 10E shows the eight embodiment of the circuit breaker in the tripped operation state;

Figure 11A shows a movable element of the eight embodiment of the circuit breaker;

Figure 11B shows a coupling element of the eight embodiment of the circuit breaker;

Figure 12A shows a breaker element of a ninth embodiment of a circuit breaker comprising a movable and a coupling element in a latched configuration;

Figure 12B shows the ninth embodiment of the circuit breaker comprising a movable element and a coupling element in a manually switchable state in an open configuration; Figure 12C shows the ninth embodiment of the circuit breaker comprising a movable element and a coupling element in a manually switchable state in a closed configuration; Figure 12D shows a breaker element of the ninth embodiment of a circuit breaker comprising a movable and a coupling element in an unlatched configuration;

Figure 12E shows the ninth embodiment of the circuit breaker in the tripped operation state;

Figure 13A shows a movable element of the ninth embodiment the circuit breaker;

Figure 13B shows a coupling element of the ninth embodiment of the circuit breaker;

Figure 14A shows a breaker element of a tenth embodiment of circuit breaker comprising a movable and a coupling element in a latched configuration;

Figure 14B shows the tenth embodiment of the circuit breaker comprising a movable element and a coupling element in a manually switchable state in an open configuration;

Figure 14C shows the tenth embodiment of the circuit breaker comprising a movable element and a coupling element in a manually switchable state in a closed configuration;

Figure 14D shows a breaker element of the tenth embodiment of a circuit breaker comprising a movable and a coupling element in an unlatched configuration; and Figure 14E shows the tenth embodiment of the circuit breaker in the tripped operation state.

Detailed Description Figures 1A to 14E show several embodiments of a circuit breaker 1 according to a compliant mechanism concept

comprising an interchangeable revolute and prismatic joint in order to switch the circuit breaker from a manually

switchable state to a tripped operation state. The circuit breaker comprises a fixed contact 10, a breaker element 20 and an actuation element 30 housed in a casing 40. The breaker element 20 comprises a flexible coupling portion 21 (Figures 1 to 9D) , 330 (Figures 10A to 14E) and fixed coupling portion 22 (Figures 1 to 9D) , 340 (Figures 10A to 14E) to couple the actuation element 30 to the breaker element 20. The breaker element 20 further comprises a movable element 100 including a movable contact 110 (Figures 1 to 9D) or a movable element 200 including a movable contact 210 (Figures 10A to 14E) .

The actuation element 30 is configured to manually switch the circuit breaker between the open and closed state, when the circuit breaker is operated in the manually switchable operation state. The actuation element 30 may be configured as a knob that is rotatably arranged at the casing 40. The breaker element 20 is configured to move the movable element 100, 200 in the manually switchable operation state so that the movable contact 110, 210 is moved between the open and closed state. In the open state, the movable contact 110, 220 is isolated from the fixed contact 10 and, in the closed state, the movable contact 110, 210 is electrically connected to the fixed contact 10. The flexible coupling portion 21, 330 of the breaker element 20 provides a compliant opening and closing mechanism for the circuit breaker when operated in the manually switchable state.

The casing 40 comprises a slot 41 that is arranged in a wall 400 of the casing. The breaker element 20 is movably arranged in the slot 41 of the casing between a first position A and a second position B. The circuit breaker 1 is operated in the manually switchable operation state in which the movable contact 110, 210 can be moved by the actuation element 30 between the open and closed state, when the breaker element 20 is arranged at the first position A of the slot 41 of the casing 40.

The breaker element 20 may comprise a guiding pin 120

(Figures 1A to 9D) , 220 (Figures 10A to 14E) that is slidably arranged in the slot 41 of the casing 40 between the first position A and the second position B. The circuit breaker 1 is operated in the manually switchable state, when the guiding pin 120. 220 is arranged at the first position A of the slot 41 of the casing 40. The breaker element 20 and thus the movable element 100, 200 are rotatably arranged around the guiding pin 120, 220, when the circuit breaker is

operated in the manually switchable state and the guiding pin is arranged at the first position A of the slot 41. In this case, the guiding pin 120, 220 has the functioning of a revolute joint.

The circuit breaker 1 is operated in the tripped state in which the movable contact 110, 210 is switched in the open state without operating the actuation element 30 when the breaker element 20 is arranged at the second position B of the slot 41 of the casing 40. In particular, the circuit breaker 1 is operated in the tripped operation state when the guiding pin 120, 220 is moved in the slot 41 so that the guiding pin 120, 220 is arranged at the second position B of the slot 41. In this case the guiding pin has the functioning of a prismatic joint. The circuit breaker is switched from the manually switchable state to the tripped state in case of a short-circuit. The guiding pin 120, 220 represents the interchangeable revolute and prismatic joint that is used to operate the circuit breaker in the manually switchable state in which the movable contact 110, 210 is movable by the actuation element 30 between the open and closed state and to change the operation state from the manually switchable state to the tripped state in which the movable contact 110, 210 is switched in the open operation state without operating the actuation element 30.

According to the embodiments of the circuit breaker shown in Figures 1A to 9D, the circuit breaker 1 comprises a locking element 50 being movably arranged between a locked and a released position. The breaker element 20 is locked by the locking element 50 in the first position A of the slot 41 of the casing, when the locking element 50 is moved to the locked position. On the other hand, the breaker element 20 is released by the locking element 50 to be moved from the first position A of the slot 41 to the second position B of the slot 41, when the locking element 50 is moved to the released position .

The circuit breaker may comprise a spring element 60 coupled to the breaker element 20 to move the breaker element 20 from the first position A of the slot 41 to the second position B of the slot 41, when the locking element 50 is arranged at the released position. The circuit breaker may comprise a solenoid tripping actuator 70 comprising a solenoid and a solenoid pin. In the case of a short-circuit the solenoid tripping actuator exerts a force to the locking element 50 so that the locking element 50 is moved from the locked position to the released position. For reasons of simplified

illustration, the solenoid tripping actuator 70 is only shown in Figure 1A, but is included in the other embodiments of the circuit breaker according to the Figures 1A to 9D as well. Figures 1A to 2B show a first embodiment of the circuit breaker 1 to realize a switching between the manually

switchable operation state and the tripped operation state. The locking element 50 comprises a pin 500 and a spring 510. The pin 500 and the spring 510 are mechanically coupled to form a spring loaded pin 51. As shown in Figure 1A and IB, the spring loaded pin 51 is arranged in a guiding slot 41 of the casing 40. The pin 500 is secured by the spring 510 in the slot 41 to lock the guiding pin 120 at the first position A of the slot 41, as shown in Figure 1C. When the guiding pin 120 is secured at the first position A, the guiding pin 120 represents a revolute joint around which the movable element 100 can be rotated by operating the actuation element 30 to move the movable contact 110 between the open and closed state .

Figure 2A shows a circuit breaker according to the first embodiment in a tripped operation state according to the spring loaded pin concept. The spring loaded pin 51 is arranged in the slot 41 so that the pin 500 is pulled back in the slot 41 by means of the solenoid tripping actuator 70, when a short circuit occurs. The pin 500 releases the guiding pin 120 so that the breaker element 20 is moved by the spring element 60 from the first position A to the second position B of the slot 41, as shown in Figure 2B. When changing its operation state from the manually switchable state to the tripped operation state, the guiding pin 120 represents a prismatic joint that is translationally moved in the slot 41 from the first position A to the second position B. The spring element 60 pushes the breaker element 20 backwards so that the movable contact 110 is separated from the fixed contact 10. Figures 1A to 2B show the spring loaded pin concept to realize a tripping operation of the circuit breaker by pulling the pin 500 of the spring loaded pin 51 back in a lower portion of a guiding slot 42. Figures 3A to 4B show a similar spring loaded pin concept to realize the switching of the circuit breaker between the manually switchable operation state and the tripped operation state, wherein the spring loaded pin 51 is arranged in the upper portion of the guiding slot 42. The pin 500 of the spring loaded pin 51 is pushed back in the upper portion of guiding slot 42 from a push solenoid tripping actuator. As shown in Figures 3A to 4B the spring loaded pin 51 is arranged in the upper portion of the guiding slot 42 that enters the slot 41 from an upper

direction, whereas the guiding slot 42 shown in Figures 1A to 2B enters the slot 41 from the lower side.

As shown in Figures 3A and 3B, the spring loaded pin 51 is arranged in the guiding slot 42 so that the pin 500 is secured by the spring 510 in the slot 41 of the casing to lock the guiding pin 120 at the first position A of the slot 41. In this state, the breaker element 20 is rotatably arranged around the guiding pin 120 so that the movable contact 110 can be manually opened and closed by the

actuation element 30. As shown in Figures 4A and 4B the spring loaded pin 51 is pushed back, for example by a

solenoid tripping actuator not shown in Figures 4A and 4B, so that the pin 500 is moved out of the slot 41 of the casing 40. As a consequence, the guiding pin 120 is

unlocked/released and the breaker element 20 is moved by the spring element 60 from the first position A to the second position B of the slot 41. As a result, the movable contact 110 is electrically separated from the fixed contact 10.

Figures 5A to 5D shows a circuit breaker 1 comprising a spring loaded ball plunger 52 to realize the switching between the manually switchable operation state and a tripped operation state of the circuit breaker. According to the embodiment of the circuit breaker shown in Figures 5A to 5D, the locking element 50 comprises a spring 520 and a ball plunger 530 to be mechanically coupled to form the spring loaded ball plunger 52. The guiding pin 120 has a cavity 121. The spring loaded ball plunger 52 is arranged within the cavity 121 of the guiding pin 120. The ball plunger 530 is arranged at the end of the spring 520 and protrudes out of the cavity 121 of the guiding pin 120.

As shown in Figure 5B, the slot 41 of the casing 40 comprises a detent 43 at the first position A of the slot 41. The spring loaded ball plunger 52 is arranged so that the ball plunger 530 is locked by the spring 520 in the detent 42 of the slot 41 of the casing 40 to lock the breaker element 20 at the first position A of the slot 41 of the casing. In the locked position of the breaker element 20, the movable contact 110 may be manually moved between the open and closed position by the actuation element 30. In this configuration, the circuit breaker is operated in the manually switchable operation state.

The spring loaded ball plunger 52 is further arranged so that the ball plunger 530 is lifted by a solenoid tripping

actuator 70 out of the detent 42 to release the breaker element 20, as shown in Figure 5E, when a short-circuit occurs. In the unlocked state, the breaker element 20 is pushed by the spring element 60 from the first position A to the second position B of the slot 41 of the casing 40. In this case the movable contact 110 is moved in the open position, as shown in Figure 5D. The actuation element 30 is moved in an intermediate position between the open and closed position . Figures 6A to 6D illustrate an embodiment of a circuit breaker 1 using a spring loaded pin concept to realize switching the circuit breaker from the manually switchable state to the tripped state. According to the spring loaded pin concept illustrated in Figures 6A to 6D, the locking element 50 comprises a spring 520 and a pin 540 being

mechanically coupled to form a spring loaded center pin 53. The pin 540 has a ball-shaped end 541. The spring loaded center pin 53 is coupled to the guiding pin 120. The spring loaded center pin 53 is arranged within a cavity 121 of the guiding pin 120. The ball-shaped end 541 of the pin 540 protrudes out of the cavity 121 of the guiding pin 120.

As shown in Figures 6B and 6D, the slot 41 of the casing 40 comprises a detent 43 at the first position A of the slot 41. The spring loaded center pin 53 is arranged so that the ball- shaped end 541 of the pin 540 is locked by the spring 520 in the detent 42 of the slot 41 to lock the breaker element 20 at the first position A of the slot 41. Figures 6A and Figure 6B shows the breaker element 20 in the locked state, wherein Figure 6A illustrates the open state of the contacts 10 and 110 and Figure 6B illustrates the closed states of the contacts 10 and 110. In the locked state of the breaker element 20 the circuit breaker is operated in the manually switchable state in which the movable contact 110 can be moved between the open and closed state by the actuation element 30.

The spring loaded center pin 53 is arranged so that the ball- shaped end 541 of the spring loaded center pin 53 is lifted by the solenoid tripping actuator 70 out of the detent 43 to release the breaker element 20, when the circuit breaker is switched in the tripped operation state. In the released state of the breaker element 20, the breaker element 20 can be moved/pulled by the spring element 60 from the first position A to the second position B of the slot 41.

Figure 6D shows the spring loaded center pin 53 in a state in which the ball-shaped end 541 of the pin 540 is lifted out of the detent 43. In this state, the guiding pin 120 is freely movable in the slot 42 so that the breaker element 20 and thus the movable element 100 can be pulled backwards by means of the spring element 60, as shown in Figure 6D. By lifting the spring loaded pin 540 out of the detent 43, the circuit breaker can be switched from the manually switchable state to the tripped operation state in which the movable contact 110 is in the open position. Figures 7A to 7D show an embodiment of a circuit breaker comprising a locking element being configured as a spring loaded sliding latch to switch the circuit breaker from the manually switchable operation state to the tripped operation state. The spring loaded sliding latch 54 is configured to operate the breaker element 20 in a locked state that

corresponds to the manually switchable operation state and in a released state that corresponds to the tripped operation state of the circuit breaker. As shown in the isometric view of Figure 7A, the sliding latch 54 has a first portion 551 and a second portion 552 that are identically formed and connected by a third portion 553. The first and the second portion 551, 552 are arranged parallel to each other, and the third portion 553 is arranged orthogonally to the first and the second portion 551, 552 of the sliding latch 54. As illustrated in Figure 7A, the first, second and third portion 551, 552, 553 of the sliding latch are arranged so that the sliding latch 54 is U-shaped. Each of the first and second portion 551, 552 of the sliding latch 54 has a projecting section 554 and an indentation or

notched-shaped section 555.

As shown for the manually switchable operation state in

Figures 7B, 7C and 7D, the spring loaded sliding latch 54 is slidably arranged in a guiding channel 44 to be moved by the solenoid tripping actuator 70 between the locked position and the released position. Figures 7B and 7C show the spring loaded sliding latch 54 in a position in which the projecting portion 554 secures the guiding pin 120 so that the breaker element 20 can be moved by the actuation element 30 between the open state shown in Figure 7B and the closed state shown in Figure 7C. In order to switch the circuit breaker from the manually switchable operation state illustrated in Figures 7B and 7C, to the tripped operation state illustrated in Figure 7D, the solenoid tripping actuator 70 moves the sliding latch 550 in the guiding channel 44 towards the right direction so that the guiding pin 120 slides in the indentation/notch-shaped portion 555. In this configuration the guiding pin is freely movable within the slot 41 of the casing 40 so that the spring element 60 can move/pull the breaker element 20 backwards, as shown in Figure 7D, so that the movable contact 110 is moved in the open state and the circuit breaker is switched in the tripped operation state.

Figures 8A to 8C show an embodiment of a circuit breaker using a rotatable latch 55 being configured as a spring loaded ring to operate the circuit breaker in the manually switchable operation state and the tripped operation state. According to the configuration shown in Figures 8A to 8C, a locking element 50 comprises a rotatable latch 55 being rotatably arranged at the casing 40 by a revolute joint 45. The rotatable latch 55 comprises a hook-shaped portion 560 to engage the guiding pin 120, when the rotatable latch 55 is arranged at a first rotational position shown in Figures 8A and 8B. The rotatable latch 55 is configured to be moved by a

solenoid tripping actuator 70 from the first rotational position (Figures 8A and 8B) to the second rotational

position (Figure 8C) in which the hook-shaped portion 560 of the rotatable latch 55 and the guiding pin 120 are

disengaged. In the state shown in Figure 8C, the breaker element 20 is released and the guiding pin 120 is freely movable within the slot of the casing 40. As illustrated in Figure 8C, the spring element 60 moves/pulls the breaker element 20 from a first position shown in Figures 8A and 8B to a second position of the slot shown in Figure 8C, when the breaker element 20 is released.

The breaker element 20 is moved within the slot by means of the guiding pin 120 that slides from the position A (Figures 8A and 8B) to the position B (Figure 8C) . When the guiding pin 120 is moved to the position B, the circuit breaker is switched in the tripped operation state in which the movable contact 110 is in the open state, as shown in Figure 8C. Figures 9A to 9C show an embodiment of a circuit breaker comprising a spring loaded ring-shaped latch 56 to switch the circuit breaker from the manually switchable state to the tripped operation state. According to the embodiment of the circuit breaker shown in Figures 9A to 9D, the locking element 50 is configured as a spring loaded ring-shaped latch 56 comprising a ring-shaped latch 570. The ring-shaped latch 570 comprises a slot 571 extending from an outer rim 572 of the ring-shaped latch 570 to a centre portion 573 of the ring-shaped latch 570. The spring loaded ring-shaped latch 56 and the breaker element 20 are coupled such that the guiding pin 120 is arranged in the slot 571 of the ring-shaped latch 570.

The spring loaded ring-shaped latch 56 is rotatably arranged at the casing 40. The spring loaded ring-shaped latch 56 is arranged in a first rotational position shown in Figures 9A and 9B, in which the slot 41 of the casing 40 and the slot 571 of the ring-shaped latch 56 are misaligned so that the guiding pin 120 is locked at the first position A of the slot 41 of the casing. In the first rotational position of the spring loaded ring-shaped latch 56, the circuit breaker is operated in the manually switchable state in which the movable contact 110 can be moved by the actuation element 30 between the open state (Figure 9A) and the closed state

(Figure 9B) .

The spring loaded ring-shaped latch 56 is configured to be moved from the solenoid tripping actuator 70 from the first rotational position to a second rotational position shown in Figure 9C. In the second rotational position of the spring loaded ring-shaped latch 56, the slot 41 of the casing 40 and the slot 571 of the ring-shaped latch 570 are aligned so that the guiding pin 120 is released, as shown in Figure 9C. In the released state of the guiding pin 120, the guiding pin 120 is freely movable within the slot 41.

The spring element 60 can pull the breaker element 20 backwards so that the guiding pin 120 and thus the breaker element 20 is moved in the slot 41 from the first position A to the second position B. At the second position B the movable contact is in the open state and the circuit breaker is in the tripped operation state. As shown in Figure 9C, the actuation element 30 is set to an intermediate position between the open and closed rotational positions of the actuation element, when the circuit breaker is operated in the tripped operation state.

Figures 10A to 14E show different embodiments of a circuit breaker comprising the fixed contact 10 and a breaker element 20 comprising a movable element 200 and a coupling element 300, wherein the movable element 200 and the coupling element 300 are engageable to form a connected component effecting as a single component, when the circuit breaker is operated in the manually switchable state. The movable element 200 comprises a movable contact 210. The breaker element 20 is configured to move the movable element 200 so that the movable contact 210 is moved between an open and closed state. In the open state, the movable contact 210 is isolated from the fixed contact 10. In the closed state, the movable contact 210 is electrically connected to the fixed contact 10.

The circuit breaker further comprises the actuation element 30 to manually switch the circuit breaker 1 between the open and closed state. The coupling element 300 is configured to provide a force transmission from the actuation element 30 to the movable element 200 to move the movable contact 210 between the open and closed state. The coupling element 300 comprises a flexible portion 330 and a fixed portion 340 to couple the coupling element 300 to the actuation element 30. The coupling element 300 provides a compliant opening and closing mechanism for the circuit breaker. The breaker element 20 is configured to be operated in a manually switchable state in which the movable contact 210 is moved by the actuation element 30 between the open and closed state, when the movable element 200 engages the coupling element 300. Furthermore, the circuit breaker 1 is configured to be operated in the tripped operation state in which the movable contact 210 is switched in the open state without operating the actuation element 30, when the movable element 200 disengages the coupling element 300. The circuit breaker comprises a solenoid tripping actuator 70 to exert a force to the movable element 200 to disengage the movable element 200 and the coupling element 300. For reasons of simplified illustration, the solenoid tripping actuator 70 is only shown in Figure 1A, but is included in the other embodiments of the circuit breaker according to the Figures 10A to 14E as well. The movement of the solenoid tripping actuator 70 is provoked by a high current that flows through a solenoid of the solenoid tripping actuator in the case of a short-circuit. The electromagnetic field generated by the solenoid effects that a solenoid pin is moved out of the solenoid and hits the movable element 200 to disengage the movable element 200 from the coupling element 300. In the disengaged state, the movable contact cannot be moved by the actuation element 30. The circuit breaker is rather switched in the tripped operation state in which the movable contact is electrically separated from the fixed contact 10.

Figures 10A to 10E show an embodiment of a circuit breaker 1 wherein the breaker element 20 comprises two separate

components, i.e. the movable element 200 and the coupling element 300 that are operated in an engaged configuration when the circuit breaker is operated in the manually

switchable state. The movable element 200 and the coupling element 300 are disengaged from each other when the circuit breaker is switched from the manually switchable state to the tripped operation state.

Figure 10A shows the movable element 200 and the coupling element 300 in the engaged configuration. Figure 10B shows the circuit breaker 1 comprising the movable element 200 and a coupling element 300 in a manually switchable state, wherein the movable contact 210 is in the open state. Figure IOC shows a circuit breaker 1 comprising the movable element 200 and the coupling element 300 being operated in a manually switchable state, wherein the movable contact 210 is in the closed state. Figure 10D shows the movable element 200 and the coupling element 300 in an unlatched configuration.

Figure 10E shows a circuit breaker comprising the movable element 200 and the coupling element 300 in an unlocked configuration so that the circuit breaker is operated in the tripped operation state.

Figure 11A shows the movable element 200 of the circuit breaker as illustrated in Figures 10A to 10E in a detailed view. Figure 11B shows the coupling element 300 of the circuit breaker as illustrated in Figures 10A to 10E in a detailed view.

As shown in Figure 11A, the movable element 200 comprises a latching protrusion 230 having a slanted surface 231. Figure 11B shows the coupling element 300 comprising a latching slot 310 having a slanted surface 311. In the engaged

configuration the latching protrusion 230 engages in the latching slot 310 so that the movable element 200 and the coupling element 300 are latched.

In the latched configuration of the movable element 200 and the coupling element 300 the circuit breaker is operated in the manually switchable state, as shown in Figures 10A to IOC. In the latched configuration of the movable element 200 and the coupling element 300 the movable contact may be switched between the open and closed state by means of the actuation element 30 as illustrated in Figures 10B and IOC. The movable element 200 rotates around the guiding pin 220, when the actuation element is moved in the clockwise/anti^¬ clockwise direction.

In order to switch the circuit breaker from the manually switchable operation state to the tripped operation state the solenoid tripping actuator 70 exerts a force onto the movable element 200 so that the slanted surface 231 of the latching protrusion 230 slides over the slanted surface 311 of the latching slot 310. As a result, the latching protrusion 230 of the movable element 200 is lifted out of the latching slot 310 of the coupling element 300, so that the movable element 200 and the coupling element 300 are disengaged, when the state of the circuit breaker 1 is changed from the manually switchable operation state to the tripped operation state.

In the unlatched configuration of the movable element 200 and the coupling element, the guiding pin 220 is freely movable within the slot of the casing 40. Therefore, in the tripped operation state of the circuit breaker, the spring element 60 may pull the guiding pin 220 and thus the movable element 200 in a slot of the casing 40 backwards so that the movable contact 210 is separated from the fixed contact 10, as shown in Figure 10E. Figures 12A to 12D show a configuration of a circuit breaker comprising a breaker element 20 that comprises two separate components, i.e. the movable element 200 and the coupling element 300. The movable element 200 and the coupling element 300 may be latched to form a single part or may be

disengaged. Figure 12A shows the movable element 200 and the coupling element 300 in the latched configuration. Figure 12B shows a circuit breaker 1 comprising the movable element 200 and the coupling element 300 in a latched configuration to operate the circuit breaker in the manually switchable operation state. The movable contact 210 is switched by the actuation element 30 in the open state. Figure 12C shows the circuit breaker 1 comprising the movable element 200 and the coupling element 300 in the latched configuration to operate the circuit breaker in the manually switchable state, wherein the movable contact 210 is switched by the actuation element 30 in the closed state. Figure 12D shows the movable element 200 and the coupling element 300 in the unlatched

configuration. In this configuration, the movable element 200 cannot be moved by the actuation element 30.

Figure 13A shows a perspective view of the movable element 200. Figure 13B shows a perspective view of the coupling element 300. The movable element 200 comprises the movable contact 210 and a flexible beam 240. The coupling element 300 comprises a surface 320 being structured such that the flexible beam 240 can engage the structured surface 320 of the coupling element to couple the movement of the coupling element 300 to the movement of the movable element 200, when the circuit breaker 1 is operated in the manually switchable operation state.

In the latched configuration of the movable element 200 and the coupling element 300 the movable contact 210 may be switched from the open into the closed configuration by means of the actuation element 30 and vice versa, as shown in

Figures 12B and 12C. In order to change the operation state of the circuit breaker from the manually switchable operation state to the tripped operation state, the movable element 200 is configured such that a solenoid tripping actuator 70 impacts a force onto the flexible beam 230 in case of a short-circuit to disengage the flexible beam 230 from the structured surface 320 of the coupling element 300 so that the movable element 200 and the coupling element 300 are in an unlatched state. In the unlatched configuration of the movable element 200 and the coupling element 300 shown in Figure 12D, the movable element 200 is freely movable in a slot of the casing 40 of the circuit breaker. The movable element 200 is pulled back by the spring element 60 so that the guiding pin 220 slides from the front position A of the slot to the back position B of the slot. Thus, the movable contact 210 and the fixed contact 10 gets separated. In this case the circuit breaker is operated in the tripped state.

Figures 14A to 14E show an embodiment of a circuit breaker 1 comprising a movable element 200 and a coupling element 300 that are configured as two separate components. The movable element 200 and the coupling element 300 can be engaged to be in a latched configuration.

Figure 14A shows the breaker element 20 coupled to the actuation element 30. The movable element 200 comprises a hole/cavity 250. A flexible beam 350 of the coupling element 300 is inserted in the hole/cavity 250 of the movable element 200. The movable element 200 comprises a latching notch 251 in a side wall 252 of the hole/cavity 250 to latch an end 351 of the flexible beam 350 of the coupling element 300 to the movable element 200 to couple the movement of the coupling element 300 to the movement of the movable element 200, when the circuit breaker 1 is operated in the manually switchable operation state.

Figure 14A shows the movable element 200 and the coupling element 300, wherein the flexible beam 350 is latched in the latching notch 251 of the movable element 200 so that the movable element 200 and the coupling element 300 are in a latched configuration. In the latched configuration, the movable contact 210 may be moved from the open to the closed state by the actuation element 30. Figure 14B shows the circuit breaker comprising the movable element 200 and the coupling element 300 in the latched configuration to operate the circuit breaker in the manually switchable state, wherein the movable contact 210 is in the open state. Figure 14C shows the circuit breaker comprising the movable element 200 and the coupling element 300 in the latched state to operate the circuit breaker in the manually switchable state, wherein the movable contact 210 is in the closed state. In the case of a short-circuit, a solenoid tripping actuator 70 impacts a force on the flexible beam 350 to disengage the coupling element 300 and the movable element 200. Figure 14D shows the movable element 200 and the coupling element 300 in the unlatched configuration. The impact force of the solenoid tripping actuator leads to a deflection of the flexible beam 350 leading in turn to an unlatching of the movable element 200 and the coupling element 300. As a result, the mechanism loses its bi-stability . In the unlatched configuration the movable element 200 can be pulled back by the spring element 60 so that the guiding pin 220 slides backwards in a slot of the casing 40 and the movable contact 210 and the fixed contact 10 gets separated, as shown in the tripped operation state of the circuit breaker in Figure 14E.

List of Reference Signs

1 circuit breaker

10 fixed contact

20 breaker element

30 actuation element

40 casing

41 slot in the casing

42 guiding slot

43 detent

44 guiding channel

50 locking element

51 spring loaded pin

52 spring loaded ball plunger

53 spring loaded center pin

54 spring loaded sliding latch

55 rotatable latch

56 spring loaded ring-shaped latch

60 spring element

70 solenoid tripping actuator

100 movable element

110 movable contact

120 guiding pin

200 movable element

210 movable contact

220 guiding pin

230 latching protrusion

240 flexible beam

250 hole of the movable element

300 coupling element

310 latching slot

320 structured surface of the coupling element

330 flexible portion of the coupling element

340 fixed portion of the coupling element

350 flexible beam of the coupling element 400 wall of the casing

500 pin

510 spring

530 ball plunger

540 pin

560 hook-shaped portion of rotatable latch

570 ring-shaped latch

Claims

1. A circuit breaker with tripping functionality, comprising:

- a fixed contact (10),

- a breaker element (20) comprising a movable element (100, 200) including a movable contact (110, 210), the breaker element being configured to move the movable element (100, 200) so that the movable contact (110, 210) is moved between an open and closed state of the circuit breaker (1), wherein in the open state, the movable contact (110, 210) is isolated from the fixed contact (10), and, in the closed state, the movable contact (110, 210) is electrically connected to the fixed contact (10),

- an actuation element (30) to manually switch the circuit breaker (1) between the open and closed state,

- a casing (40) comprising a slot (41), wherein the breaker element (20) is movably arranged in the slot (41) of the casing between a first and a second position (A, B) ,

- wherein the circuit breaker (1) is operated in a manually switchable state in which the movable contact (110, 210) is movable by the actuation element (30) between the open and closed state, when the breaker element (20) is arranged at the first position (A) of the slot (41) of the casing (40),

- wherein the circuit breaker (1) is operated in the tripped state in which the movable contact (110, 210) is switched in the open state without operating the actuation element (30), when the breaker element (20) is arranged at a second

position (B) of the slot (41) of the casing (40) . 2. The circuit breaker of claim 1,

wherein the breaker element (20) comprises a guiding pin (120) that is slideably arranged in the slot (41) of the casing (40) between the first position (A) and the second position (B) of the slot (41) of the casing (40) .

3. The circuit breaker of claim 1 or 2, comprising:

a spring element (60) coupled to the breaker element (20) to move the breaker element (20) from the first position (A) of the slot (41) of the casing to the second position (B) of the slot (41) of the casing, when the circuit breaker (1) is operated in the tripped state.

4. The circuit breaker of one of the claims 1 to 3,

comprising :

- a locking element (50) being movably arranged between a locked and a released position,

- wherein the breaker element (20) is locked by the locking element (50) in the first position (A) of the slot (41) of the casing, when the locking element (50) is moved to the locked position,

- wherein the breaker element (20) is released by the locking element (50) to be moved from the first position (A) of the slot (41) of the casing to the second position (B) of the slot (41) of the casing, when the locking element (50) is moved to the released position.

5. The circuit breaker of claim 4, comprising:

- a solenoid tripping actuator (70) to exert a force to the locking element (50) so that the locking element (50) is moved from the locked position to the released position,

- wherein the spring element (60) is configured to move the breaker element (20) from the first position (A) of the slot (41) of the casing to the second position (B) of the slot (41) of the casing, when the locking element (50) is arranged at the released position.

6. The circuit breaker of the claim 4 or 5,

wherein the locking element (50) comprises a pin (500) and a spring (510) being mechanically coupled to form a spring loaded pin (51) .

7. The circuit breaker of claim 6,

- wherein the spring loaded pin (51) is arranged so that the pin (500) is secured by the spring (510) in the slot (41) of the casing (40) to lock the guiding pin (120) at the first position (A) of the slot (41) of the casing (40),

- wherein the spring loaded pin (51) is arranged so that the pin (500) is pulled or pushed back by the solenoid tripping actuator (70) to be moved out of the slot (41) of the casing (40) and to release the guiding pin (120) so that the breaker element (20) is moved by the spring element (60) from the first position (A) to the second position (B) of the slot (41) of the casing (40) . 8. The circuit breaker of claims 4 or 5,

wherein the locking element (50) comprises a spring (520) and a ball plunger (530) being mechanically coupled to form a spring loaded ball plunger (52),

- wherein the guiding pin (120) has a cavity (121), wherein the spring loaded ball plunger (52) is arranged within the cavity (121) of the guiding pin (120), wherein the ball plunger (530) protrudes out of the cavity (121) of the guiding pin (120) . 9. The circuit breaker of claim 8,

- wherein the slot (41) of the casing (40) comprises a detent (43) at the first position (A) of the slot (41) of the casing,

- wherein the spring loaded ball plunger (52) is arranged so that the ball plunger (530) is locked by the spring (520) in the detent (42) of the slot (41) of the casing (40) to lock the breaker element (20) at the first position (A) of the slot (41) of the casing,

- wherein the spring loaded ball plunger (52) is arranged so that the ball plunger (530) is lifted by the solenoid tripping actuator (70) out of the detent (42) to release the breaker element (20) to be moved by the spring element (60) from the first position (A) to the second position (B) of the slot (41) of the casing.

10. The circuit breaker of claim 4 or 5,

- wherein the locking element (50) comprises a spring (520) and a pin (540) being mechanically coupled to form a spring loaded pin (53), wherein the pin (540) has a ball-shaped end (541),

- wherein the guiding pin (120) has a cavity (121), wherein the spring loaded pin (53) is arranged within the cavity (121) of the guiding pin (120), wherein the ball-shaped end (541) of the pin (540) protrudes out of the cavity (121) of the guiding pin (120) .

11. The circuit breaker of claim 10,

- wherein the spring loaded pin (53) is arranged so that the ball-shaped end (541) of the pin (540) of the spring loaded pin (53) is locked by the spring (520) in the detent (43) of the slot (41) of the casing (40) to lock the breaker element (20) at the first position (A) of the slot (41) of the casing,

- wherein the spring loaded pin (53) is arranged so that the ball-shaped end (541) of the spring loaded pin (53) is lifted by the solenoid tripping actuator (70) out of the detent (43) to release the breaker element (20) to be moved by the spring element (60) from the first position (A) to the second position (B) of the slot (41) of the casing.

12. The circuit breaker of claim 4 or 5, wherein the locking element (50) comprises a spring loaded sliding latch (54) being slidably arranged in a guiding channel (44) of the casing (40) to be moved by the solenoid tripping actuator (70) between the locked position and the released position.

13. The circuit breaker of claim 4 or 5,

- wherein the locking element (50) comprises a rotatable latch (55) being rotatably arranged at the casing (40),

- wherein the rotatable latch (55) comprises a hook-shaped portion (560) to engage the guiding pin (120), when the rotatable latch (55) is arranged at a first rotational position,

- wherein the rotatable latch (55) is configured to be moved by the solenoid tripping actuator (70) from the first

rotational position to a second rotational position in which the hook-shaped portion (560) of the rotatable latch (55) and the guiding pin (120) are disengaged so that the breaker element (20) is released and moved by the spring element (60) from the first position (A) to the second position (B) of the slot (41) of the casing (40) .

14. The circuit breaker of claim 4 or 5,

- wherein the locking element (50) is configured as a spring loaded ring-shaped latch (56) comprising a ring-shaped latch

(570) ,

- wherein the ring-shaped latch (570) comprises a slot (571) extending from an outer rim (572) of the ring-shaped latch (570) to a center portion (573) of the ring-shaped latch (570),

- wherein the spring loaded ring-shaped latch (56) and the breaker element (20) are coupled such that the guiding pin (120) is arranged in the slot (571) of the ring-shaped latch (570) .

15. The circuit breaker of claim 14,

- wherein the spring loaded ring-shaped latched (56) is rotatably arranged at the casing (40),

- wherein the spring loaded ring-shaped latch (56) is

arranged in a first rotational position in which the slot

(41) of the casing (40) and the slot (571) of the ring-shaped latch (56) are misaligned so that the guiding pin (120) is locked at the first position (A) of the slot (41) of the casing,

- wherein the spring loaded ring-shaped latch (56) is

configured to be moved from the solenoid tripping actuator (70) from the first rotational position to a second

rotational position in which the slot (41) of the casing (40) and the slot (571) of the ring-shaped latch (570) are aligned so that the guiding pin (120) is released and the beaker element (20) is moved by the spring element (60) from the first position (A) to the second position (B) of the slot (41) of the casing. 16. The circuit breaker of one of the claims 1 to 3,

- wherein the breaker element (20) comprises a coupling element (300) to provide a force transmission from the actuation element (30) to the movable element (200) to move the movable contact (210) between the open and closed state, - wherein the movable element (200) of the breaker element (20) is engagable to the coupling element (300),

- wherein the breaker element (20) is configured to be operated in a switchable state in which the movable contact (210) is moved by the actuation element (30) between the open and closed state, when the movable element (200) engages the coupling element (300),

- wherein the circuit breaker (1) is configured to be

operated in the tripped state in which the movable contact (210) is switched in the open state without operating the actuation element (30), when the movable element (200) disengages the coupling element (300) .

17. The circuit breaker of claim 16, comprising:

- a solenoid tripping actuator (70) to exert a force to the movable element (200) to disengage the movable element (200) and the coupling element (300) .

18. The circuit breaker of claim 17,

- wherein the coupling element (300) comprises a latching slot (310) having a slanted surface (311),

- wherein the movable element (200) comprises a latching protrusion (230) having a slanted surface (231),

- wherein the slanted surface (231) of the latching

protrusion (230) slides over the slanted surface (311) of the latching slot (310) so that the movable element (200) is lifted out of the latching slot (310) of the coupling element (300) to disengage the movable element (200) and the coupling element (300), when the state of the circuit breaker (1) is changed from the manually switchable state to the tripped state .

19. The circuit breaker of claim 17,

- wherein the movable element (200) comprises a flexible beam (240),

- wherein the coupling element (300) comprises a surface (320) being structured such that the flexible beam (230) engages the structured surface (320) of the coupling element to couple the movement of the coupling element (300) to the movement of the movable element (200), when the circuit breaker (1) is operated in the manually switchable state,

- wherein the movable element (200) is configured such that the solenoid tripping actuator (70) impacts a force to the flexible beam (240) to disengage the flexible beam (240) and the coupling element (300), when the state of the circuit breaker (1) is changed from the switchable state to the tripped state.

20. The circuit breaker of claim 17,

- wherein the movable element (200) comprises a hole (250),

- wherein the coupling element (300) comprises a flexible beam (350) to be inserted in the hole (250) of the movable element (200) ,

- wherein the movable element (200) comprises a latching notch (251) a side wall (252) of the hole (250) to latch the flexible beam (350) of the coupling element (300) to couple the movement of the coupling element (300) to the movement of the movable element (200), when the circuit breaker (1) is operated in the manually switchable state,

- wherein the circuit breaker (1) is configured such that the solenoid tripping actuator (70) impacts a force to the flexible beam (350) to disengage the flexible beam (350) and the movable element (200), when the state of the circuit breaker (1) is changed from the switchable state to the tripped state.