Air circuit breaker

Abstract

An air circuit breaker is disclosed. An air circuit breaker according to one aspect of the present invention may comprise: a cradle; a circuit breaker main body which is inserted into and withdrawn from the cradle; a transfer module provided in the cradle and allowing the circuit breaker main body to be inserted into and withdrawn from the cradle; an interlock lever which vertically moves so that an upper side protruding part has a first position at a position higher than the bottom surface of the circuit breaker main body and the protruding part has a second position at a position lower than the bottom surface of the circuit breaker main body; and an interlock lever adjusting module which restricts the vertical movement of the interlock lever so that the interlock lever is fixed in the second position in a state in which the circuit breaker main body is not inserted into the cradle, and allows the interlock lever to move to the first position as the circuit breaker main body is inserted into the cradle.

Description

Air circuit breaker

[0001] The present invention relates to an air circuit breaker, and more particularly, to an air circuit breaker configured so that an interlock device is not locked when the circuit breaker body is not inserted into the cradle.

[0002] In general, an air circuit breaker (ACB) is a device that opens and closes a device that receives power from a power transmission system or line using air as an arcing medium, or cuts off the current in the event of a safety accident such as an overload or short circuit, and protects the power system and load equipment.

[0003] These types of aerial circuit breakers are of the fixed type, which is fixed to a specific location, and the drawer type, in which the circuit breaker body is installed so that it can be drawn in and out of the cradle.

[0004] In the case of a pull-out type air circuit breaker, it is divided into a disconnect position, a test position, and a connect position depending on the relative position of the circuit breaker body inside the cradle.

[0005] At this time, the disconnect position is a state in which the circuit breaker body is pulled out from the cradle and the control power terminal is disconnected (non-operating state), the test position is a state in which the circuit breaker body is inserted a predetermined distance into the cradle and the control power terminal is connected so that the connection status of the circuit breaker can be checked, and the connect position is a state in which the circuit breaker body is completely inserted into the cradle and the body terminal is connected to the cradle terminal so that the main circuit is energized (operating state).

[0006] Air circuit breakers are circuit breakers installed at the top of the distribution system, protecting the load from high fault currents. Therefore, their control must be performed with extreme care, and no one other than authorized personnel should be permitted to operate them.

[0007] For this purpose, interlock devices are used in air circuit breakers to prevent unauthorized main circuit energization and to prevent arbitrary movement of the circuit breaker body for purposes such as maintaining the operating or non-operating state or for user safety.

[0008] Interlocking functions are typically implemented either on the circuit breaker body to prevent arbitrary power application, or on the cradle to prevent arbitrary movement of the circuit breaker body. In other words, the interlocking device is implemented as two interlocks: one on the circuit breaker body and one on the cradle.

[0009] As an example of an interlock device applicable to such a cradle, the present applicant has proposed an air circuit breaker having an interlock device in Korean Patent Publication No. 10-2022-0135013.

[0010] An air circuit breaker having such an interlock device includes an interlock lever that is connected to an off button of a circuit breaker body and moves vertically, and performs an interlock function by restricting and allowing the movement of the interlock lever through a key interlock assembly structure.

[0011] In the locked state, the interlock lever is fixed in the raised first position, and in the unlocked state, the interlock lever has a structure that allows movement to the raised first position and the lowered second position.

[0012] Meanwhile, this interlock function must operate while the circuit breaker body is positioned in the cradle.

[0013] However, there may be cases where the interlock device is locked when the circuit breaker body is not inserted into the cradle due to the user's lack of skill in operation, etc.

[0014] At this time, when the circuit breaker body is inserted into the cradle, the interlock lever fixed in the first position, i.e., the raised position, receives a load due to the weight of the circuit breaker body being inserted, and the related parts that make up the interlock device may be damaged due to being pressed by the circuit breaker body.

[0015] Accordingly, there is an urgent need for the development of a technology that prevents the interlock lever from performing a locked operation to fix its position when the circuit breaker body is not inserted into the cradle.

[0016] The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide an air circuit breaker in which the interlock device is not locked when the circuit breaker body is not inserted into the cradle.

[0017] In addition, an air circuit breaker is provided that can prevent the interlock lever from being pressed against the bottom of the circuit breaker body and being damaged during the process of inserting the circuit breaker body into the cradle.

[0018] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0019] According to one aspect of the present invention, an air circuit breaker is provided.

[0020] An air circuit breaker may include: a cradle; a circuit breaker body inserted into and removed from the cradle; a transport module provided in the cradle for inserting and withdrawing the circuit breaker body; an interlock lever that vertically moves so that an upper protrusion has a first position higher than a bottom surface of the circuit breaker body and a second position lower than a bottom surface of the circuit breaker body; and an interlock lever adjustment module that restricts vertical movement so that the interlock lever is fixed at the second position when the circuit breaker body is not inserted into the cradle, and allows the interlock lever to move to the first position when the circuit breaker body is inserted into the cradle.

[0021] At this time, the interlock lever control module may include a body part rotatably fixed to one side of the transport module by a hinge axis; a head part forming one side of the body part and having a protruding height protruding upward from the transport module; and a pressing part forming the other side of the body part and forcibly maintaining the second position by pressing the interlock lever.

[0022] At this time, the interlock lever adjustment module may further include an elastic member provided on the hinge axis to support the body portion and provide elasticity.

[0023] At this time, the elastic member may be composed of a torsion spring.

[0024] Meanwhile, the head portion may be rotated while being pressed by the bottom surface of the circuit breaker body inserted into the cradle. In addition, the pressing portion may seesaw in accordance with the rotation of the head portion, thereby allowing the interlock lever to move to the first position.

[0025] At this time, preferably, the head portion forms a gently curved upper surface.

[0026] Meanwhile, the interlock lever includes a pressing portion protruding toward the interlock lever adjustment module, and the pressing portion may have a bar shape extending toward the interlock lever so as to press the pressing portion from above.

[0027] Meanwhile, the transport module includes an upper cover plate including an upper portion and a side portion. At this time, the upper cover plate may have an interlock lever hole formed in the upper portion through which the upper protrusion of the interlock lever penetrates, and a flow hole formed in the side portion through which the pressing portion penetrates and moves in a seesaw manner.

[0028] Meanwhile, the air circuit breaker may include a restraint module having a restraint plate that is movably installed in front of the transport module, and that fixes the interlock lever in a first position when in a locked position, and allows the interlock lever to move from the first position to a second position when in an unlocked position.

[0029] And, it may further include a cover plate that covers the outer surface of the transport module and has a hole formed therein; and a shutter plate that is positioned between the transport module and the cover plate and opens and closes the cover plate hole.

[0030] At this time, the restraint module can fix the shutter plate in a position to close the cover plate hole when moved to the locked position, and can allow the shutter plate to open and close the cover plate hole when moved to the unlocked position.

[0031] At this time, the restraint module includes a key assembly that moves the restraint plate, and the direction of movement of the interlock lever and the direction of movement of the restraint plate can be perpendicular to each other.

[0032] At this time, the restraint plate is formed with a restraint protrusion protruding toward the interlock lever to restrict or permit the movement of the interlock lever. In addition, the restraint protrusion can support one side of the interlock lever from the second position toward the first position in the locked position.

[0033] According to the above configuration, the air circuit breaker according to the present invention has the effect of preventing the locking of the interlock device when the circuit breaker body is not inserted into the cradle by forcibly fixing the interlock lever in the lowered second position by the interlock lever adjustment module when the circuit breaker body is not inserted into the cradle.

[0034] In addition, the interlock lever adjustment module allows the interlock lever to move from a lowered second position to a raised first position according to the process of inserting the circuit breaker body into the cradle, thereby enabling a stable interlock function to be performed.

[0035] In addition, the interlock lever adjustment module fixes the interlock lever in the lowered second position, which has the effect of preventing the interlock lever from being pressed against the bottom of the circuit breaker body and being damaged during the process of inserting the circuit breaker body into the cradle.

[0036] In addition, since the breakage of the interlock lever is prevented, it also has the effect of preventing breakage of the associated parts that constitute the interlock device associated with the interlock lever.

[0037] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the composition of the invention described in the claims.

[0038] FIG. 1 is a drawing showing an air circuit breaker according to one embodiment of the present invention.

[0039] FIG. 2 is a drawing showing a state in which the cradle and the circuit breaker body are separated from each other in an air circuit breaker according to one embodiment of the present invention, i.e., a state before being inserted.

[0040] FIG. 3 is a perspective view showing a transport module provided at the bottom of a cradle, including an interlock lever adjustment module, in an air circuit breaker according to one embodiment of the present invention.

[0041] Figure 4 is an exploded perspective view showing the internal configuration of Figure 3.

[0042] Figure 5 is a drawing showing the front cover in Figure 3 separated and viewed from a different angle.

[0043] FIG. 6 is an exploded perspective view showing a restraint module, a key assembly, and a front cover applied to an air circuit breaker according to one embodiment of the present invention.

[0044] FIG. 7 is a drawing showing a state in which a circuit breaker body is inserted into a cradle in an air circuit breaker according to one embodiment of the present invention, and the cover plate is not shown for the purpose of explaining the invention.

[0045] Figure 8 is a drawing showing an enlarged view of part “A” in Figure 7.

[0046] FIG. 9 is a schematic drawing showing the performance of an interlock function according to the position of an interlock lever in an air circuit breaker according to one embodiment of the present invention.

[0047] FIGS. 10 to 12 are drawings showing a key assembly and a restraining plate applied to an air circuit breaker according to one embodiment of the present invention.

[0048] FIG. 13 is a drawing showing an interlock lever adjustment module and an interlock lever applied to an air circuit breaker according to one embodiment of the present invention.

[0049] FIG. 14 and FIG. 15 are schematic drawings showing the process of introducing a circuit breaker body into a cradle in an air circuit breaker according to one embodiment of the present invention.

[0050] The present invention, in its best form, provides an air circuit breaker comprising: a cradle; a circuit breaker body inserted and removed from the cradle; a transport module provided in the cradle for inserting and removing the circuit breaker body; an interlock lever that vertically moves so that an upper protrusion has a first position higher than a bottom surface of the circuit breaker body and a second position lower than the bottom surface of the circuit breaker body; and an interlock lever adjustment module that restricts vertical movement so that the interlock lever is fixed at the second position when the circuit breaker body is not inserted into the cradle, and allows the interlock lever to move to the first position when the circuit breaker body is inserted into the cradle.

[0051] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals designate identical or similar components throughout the specification.

[0052] The words and terms used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best explain his or her invention.

[0053] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to a preferred embodiment of the present invention, and do not represent all of the technical ideas of the present invention, so there may be various equivalents and modified examples that can replace the configuration at the time of filing of the present invention.

[0054] In this specification, terms such as “include” or “have” are intended to describe the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0055] When a component is said to be "in front of," "behind," "above," or "below" another component, this includes not only being placed "in front of," "behind," "above," or "below" the other component in direct contact with it, but also if there is another component intervening therebetween. Furthermore, when a component is said to be "connected" to another component, this includes not only being directly connected to one another, but also being indirectly connected to one another, unless there are special circumstances.

[0056] Additionally, the positions of up, down, left, and right used in the description are to be understood with reference to the coordinate system depicted in the drawing. Furthermore, this is merely an example based on a relative perspective and does not limit the absolute positions of each component.

[0057] In addition, in explaining the present invention, specific descriptions of related known functions or configurations will be omitted in order to avoid obscuring the gist of the present invention.

[0058]

[0059] Hereinafter, an air circuit breaker according to one embodiment of the present invention will be described with reference to the drawings.

[0060] As illustrated, an air circuit breaker according to one embodiment of the present invention includes a cradle (100) and a circuit breaker body (200).

[0061] And, in order to simultaneously implement the function of restricting the insertion and withdrawal of the circuit breaker body (200), i.e., the insertion operation, and the function of restricting the positional movement of the circuit breaker body (200) to each position within the cradle (100), the device includes a transfer module (300), a restraint module (400), a shutter module (500), and an interlock device having a front cover (600) and an interlock lever (700).

[0062] In addition, the most significant feature is that it includes an interlock lever adjustment module (800) that forcibly fixes the interlock lever (700) to be in a lowered second position rather than a raised first position when the circuit breaker body (200) is not inserted into the cradle (100), thereby preventing the interlock device from being locked when the circuit breaker body (200) is not inserted into the cradle (100).

[0063]

[0064] First, FIG. 1 is a drawing showing an air circuit breaker according to one embodiment of the present invention, and FIG. 2 is a drawing showing a state in which a cradle and a circuit breaker body are separated from an air circuit breaker according to one embodiment of the present invention, i.e., a state before being inserted.

[0065] For the purpose of explaining the invention, the housing (3) is indicated by a dotted line, and the configuration seen through the housing (3) is indicated by a solid line.

[0066] Referring to FIGS. 1 and 2, an air circuit breaker (1) according to one embodiment of the present invention includes a housing (3), a cradle (100), a circuit breaker body (200), a transfer module (300), a restraint module (400), a shutter module (500) (see FIG. 4), a front cover (600), and an interlock lever (700) and an interlock lever adjustment module (800). Here, the circuit breaker body (200) and the cradle (100) are shown so that the internal configuration is visible, and only major components are shown and other components are omitted to make it easy to understand the gist of the present invention.

[0067] First, the housing (3) may be provided with a space therein to accommodate a cradle (100) and a circuit breaker body (200).

[0068] This housing (3) performs the function of protecting the main components of the air circuit breaker (1) from external impacts, etc.

[0069] In addition, a plurality of holes can be formed in the housing (3) so that the configuration for operating the cradle (100) and the circuit breaker body (200) and the configuration forming the distribution line can be exposed to the outside.

[0070] Meanwhile, the cradle (100) may be composed of a cradle body (110) and a cradle terminal (120).

[0071] This cradle body (110) can be formed in the shape of a ship body, and an inlet / outlet (111) is formed on the front of the cradle body (110) so that the circuit breaker body (200) can be inserted and removed.

[0072] In addition, the cradle body (110) supports the circuit breaker body (200) that is introduced, and allows the circuit breaker body (200) to move to the disconnect position, test position, and connect position and be fixed in each position. In addition, the cradle (100) can be connected to the main circuit and mediate the connection between the circuit breaker body (200) and the main circuit.

[0073] Meanwhile, components that assist the insertion and withdrawal of the circuit breaker body (200) may be arranged on the side of the cradle body (110). For example, referring to FIG. 2, a body guide (112) that guides the insertion and withdrawal of the circuit breaker body (200) may be provided on the inner surface of the cradle body (110).

[0074] And, a cradle terminal (120) is provided on the rear of the cradle body (110).

[0075] These cradle terminals (120) may be composed of power-side terminals and load-side terminals, and each terminal may be provided for each phase. For example, in the case of a three-phase circuit breaker, three power-side terminals and three load-side terminals may be provided.

[0076] An arc box (not shown) may be provided on the rear surface of the upper surface of the cradle body (110). The arc box performs the function of discharging the arc gas generated in the arc section (230) of the circuit breaker body (200) described later to the outside of the air circuit breaker (1).

[0077] Meanwhile, a control power supply unit (113) is formed on the front part of the upper surface of the cradle body (110). This control power supply unit (113) can perform maintenance operations such as a blocking operation test or residual current removal when the cradle (100) and the circuit breaker body (200) are not connected to the main circuit.

[0078] Meanwhile, a transfer module (300) capable of supporting and pulling in and out the circuit breaker body (200) is provided on the inner lower part of the cradle body (110).

[0079] This transfer module (300) constitutes the lower part of the cradle body (110), and the lower surface of the transfer module (300) can form the lower surface (250, FIGS. 1 and 12) of the circuit breaker body (200).

[0080] Meanwhile, the circuit breaker body (200) may include a contact portion (not shown), a switching mechanism portion (220), a trip portion (not shown), and a protection portion (230). At this time, the switching mechanism portion (220) provides a driving force to cause opening and closing of the contact portion.

[0081] In addition, the opening / closing mechanism (220) may include an on button (221) and an off button (222) for opening / closing operations of the contact portion.

[0082] When the on button (221) or the off button (222) is pressed, the main shaft (240) rotates in one direction by the driving force provided by the opening / closing mechanism (220), thereby opening and closing the contact portion. As a result, the main circuit can be powered on or off.

[0083]

[0084] Meanwhile, Fig. 3 is a perspective view showing a transport module provided at the bottom of a cradle, including an interlock lever adjustment module, in an air circuit breaker according to one embodiment of the present invention, Fig. 4 is an exploded perspective view showing the internal configuration of Fig. 3, and Fig. 5 is a view showing a state in which the front cover is separated from Fig. 3 and viewed from another angle. In addition, Fig. 6 is an exploded perspective view showing a restraint module, a key assembly, and a front cover applied to an air circuit breaker according to one embodiment of the present invention.

[0085] As described above, the transfer module (300) provided in the air circuit breaker (1) according to one embodiment of the present invention supports the circuit breaker body (200) inside the cradle (100) or allows it to be inserted into and extracted from the outside into the cradle (100).

[0086] To this end, the transport module (300) largely includes a base plate (310), an upper cover plate (320), and an inlet / outlet device (330, 340).

[0087] First, the base plate (310) provides a frame on which other components of the transport module (300) can be mounted and supported. The base plate (310) may be composed of a back portion (312) and a front portion (314).

[0088] The back surface (312) may be formed as a plate-shaped member forming the lower surface of the transport module (300). In addition, the front surface (314) may be formed so as to be bent upward from the front edge of the back surface (312) described above to cover the front of the insertion / withdrawal device (330, 340).

[0089] Meanwhile, a pull-out device (330, 340) for pulling in and pulling out the circuit breaker body (200) is installed on the upper surface of the above-described back surface (312).

[0090] These withdrawal devices (330, 340) largely include an withdrawal screw (330) and a positioning screw (340).

[0091] More specifically, a pull-out screw (330) that provides power for the pull-out and pull-out movement of the circuit breaker body (200) by receiving the force of a handle (4, Fig. 1) may be formed to extend in the front-back direction at the center of the upper surface of the back surface (312). In addition, a position indicator screw (340) may be arranged side by side on one side of the pull-out screw (330).

[0092] Meanwhile, a hole may be formed in the front part (314) to expose the front end of the lead-in screw (330) and the front end of the position indicator screw (340) to the front.

[0093] A tool groove formed in a polygonal shape (e.g., hexagonal) shape may be formed at the front end of the lead-in screw (330).

[0094] The handle (4, Fig. 1) passes through the handle insertion hole (613) of the front cover (600) and is coupled to the tool groove described above, and then rotates in one direction to transmit power for pulling out and inserting the circuit breaker body (200) to the transfer module (300).

[0095]

[0096] Meanwhile, Fig. 7 is a drawing showing a circuit breaker body inserted into a cradle in an air circuit breaker according to one embodiment of the present invention, and the cover plate is not shown for the purpose of explaining the invention. In addition, Fig. 8 is a drawing showing an enlarged portion of "A" in Fig. 7.

[0097] As described above, the opening / closing mechanism (220) constituting the circuit breaker body (200) includes an on button (221) and an off button (22) for opening / closing operations of the contact portion.

[0098] Referring to FIG. 7 together with FIG. 2, the above-described off button (222) can be installed so as to be rotatable around the off button rotation axis (225).

[0099] When the off button (222) is pressed, the off button (222) moves backward, and the off button engaging portion (223) facing the off button (222) with the off button rotation axis (225) as the center moves forward.

[0100] This off button (222) includes a torsion spring, whereby when the external force pressing the off button (222) is removed, the off button (222) can be returned to its original position.

[0101] Meanwhile, the off button catch portion (223) can protrude outward from the side wall (224) by penetrating the off button catch hole (2241) formed in the side wall (224).

[0102] The off button engaging member (223) can operate the rotating member (226) and the lifting member (228) provided on one side of the opening / closing mechanism (220).

[0103] A rotating member (226) capable of transmitting the movement of the off button engaging portion (223) to the lifting member (228) is provided at the lower side of the off button engaging hole (2241).

[0104] And, a rotation member rotation axis (2261) is installed in the center of the rotation member (226). The rotation member rotation axis (2261) is installed rotatably on the side wall (224) and is formed so as to support the rotation member (226).

[0105] Meanwhile, the rotating member (226) may be formed as a plate having two arms that extend at a predetermined angle around the center portion.

[0106] An off-button wearing hole (2263) into which an off-button catch (223) is inserted may be formed at the end of the portion extending upward among the two arms. After being combined with the off-button wearing hole (2263), the off-button catch (223) may slide in the off-button catch hole (2241) to operate the rotating member (226).

[0107] Meanwhile, one of the two arms may be formed to protrude backward, and a hook (2262) may be formed at the end to transmit the movement of the rotating member (226) to the lifting member (228).

[0108] At this time, the other of the two arms can be formed to bend in a bow shape. Accordingly, the hook (2262) of the rotating member (226) can move linearly in the up-and-down direction.

[0109] Meanwhile, the lifting member (228) is fitted into a groove formed in the upper and lower direction at the bottom of the side wall (224) to perform an up-and-down movement.

[0110] At this time, the lifting member (228) includes a plate-shaped lifting member body (2282) that extends in the vertical direction and a pressing plate (2284) that can press the interlock lever (700) downward at the lower end of the lifting member body (2282). At this time, a hook hole (2283) into which a hook (2262) of a rotating member (226) can be inserted and fitted can be formed at the upper end of the lifting member body (2282).

[0111] When the off button (222) is pressed, the off button (222) moves backward and rotates, and in conjunction with this, the rotary member (226) can rotate around the rotary member rotation axis (2261). In response, the lifting member (228) can move upward.

[0112] And, when the external force pressing the off button (222) is removed, the off button (222) returns to its original position by the restoring force of the torsion spring, and in conjunction with this, the rotating member (226) can rotate in the opposite direction. In response, the lifting member (228) moves downward.

[0113] Meanwhile, the on button (221) can be placed on the right side of the off button (222).

[0114] This on button (221) can operate the opening / closing mechanism (220) to cause an input operation. When the on button (221) is pressed, the contact part can move and conduct electricity. Meanwhile, the on button (221) is configured not to operate when the off button (222) is pressed.

[0115] Meanwhile, referring again to FIGS. 3 and 4, the interlock lever (700) can be installed on the front of the back surface (312) of the base plate (310).

[0116] At this time, the interlock lever (700) forms a protrusion (710) on the upper side. In the city, this protrusion (710) is expressed as having a triangular shape whose length becomes narrower as it goes upward, but is not limited thereto.

[0117] These protrusions (710) can protrude toward the upper side of the upper cover plate (320) constituting the transport module (300).

[0118] This upper surface cover plate (320) may have a body shape with an open front and includes a top plate (323) and a side plate (322).

[0119] Meanwhile, an interlock lever hole (321) is formed on the upper side of the upper cover plate (320), i.e., the upper plate (323), so that the protrusion (710) of the interlock lever (700) can operate by penetrating the upper cover plate (320).

[0120] The protrusion (710) forming the upper side of the interlock lever (700) can come into contact with the lower surface of the pressing plate (2284, Figs. 7 and 8) of the aforementioned lifting member (228) through the lifting movement passing through the aforementioned interlock lever hole (321).

[0121] More specifically, the pressing plate (2284) is positioned on the outside of the side wall (224) of the opening / closing mechanism (220), and the action plate (2284a, Fig. 8) that is formed by protruding as a part of the pressing plate (2284) and positioned on the inside of the side wall (224) can vertically move the interlock lever (700) when it comes into contact with the protrusion (710) of the interlock lever (700).

[0122] Meanwhile, the interlock lever (700) includes a pressing projection (730) that extends and protrudes toward the interlock lever adjustment module (800) to be described later. This pressing projection (730) is pressed by the pressing portion (840) of the interlock lever adjustment module (800) so that the interlock lever (700) is fixed in the second position when no external force is applied (when the circuit breaker body (200) is not inserted into the cradle (100).

[0123] Meanwhile, as an example, the interlock lever (700) is provided in the transport module (300) and is illustrated as having a protrusion (710) penetrating the interlock lever hole (321) of the upper cover plate (320), but is not limited thereto. In other words, the interlock lever (700) can be formed as a separate module separate from the transport module (300) if it has a structure in which the action plate (2284a, Fig. 8) of the press plate (2284) can move vertically while coming into contact with the protrusion (710).

[0124] The position control of the interlock lever (700) by the interlock lever control module (800) will be described in more detail later.

[0125]

[0126] Meanwhile, FIG. 9 is a schematic drawing showing the performance of an interlock function according to the position of an interlock lever in an air circuit breaker according to one embodiment of the present invention.

[0127] Referring to FIGS. 4, 5 and 9 together, the interlock lever (700) can be positioned in a second position moved downward (or toward the back surface (312) of the base plate (310)) as in (a) of FIG. 9.

[0128] Additionally, the interlock lever (700) may be positioned at a first position moved to the upper side (or, toward the upper cover plate (320) side) as in (b) of FIG. 9.

[0129] In other words, the interlock lever (700) is formed to be movable (up and down, based on FIG. 4) by vertical movement between the first position and the second position.

[0130] Meanwhile, the interlock lever (700) receives an upward force by the interlock lever return spring (720). Therefore, when no external force is applied, the interlock lever (700) is always positioned in the first position.

[0131] To explain the movement of the interlock lever (700) in more detail, referring to FIGS. 7 and 8 together with FIG. 9, when the off button (222) is pressed, the lifting member (228) moves upward, so that the interlock lever (700) moves to the first position by the elastic force of the interlock lever return spring (720).

[0132] And, when the off button (222) returns to the original position, the lifting member (228) moves downward, so the protrusion (710) of the interlock lever (700) is pressed downward by the pressing plate (2284) of the lifting member (228) and moves to the second position.

[0133] Meanwhile, a shutter module (500, Fig. 4) is provided on one side of the front part (314) of the base plate (310).

[0134] This shutter module (500) includes a shutter plate (510) and a shutter module return spring (not shown).

[0135] The shutter plate (510) covers the right side of the front part (314) of the base plate (310) and can be installed to be moved horizontally in the left and right directions.

[0136] Meanwhile, a shutter protrusion (520, Fig. 8) protruding to the left may be formed at the lower left side of the shutter plate (510).

[0137] Referring again to (a) of FIG. 4 and FIG. 9, when the interlock lever (700) is positioned in the second position, the shutter protrusion (520) is caught by the interlock lever (700), thereby restricting the leftward movement of the shutter plate (510).

[0138] In addition, referring to (b) of Fig. 9, when the interlock lever (700) is positioned in the first position, the shutter protrusion (520) is not caught by the interlock lever (700), allowing the shutter plate (510) to move to the left.

[0139] Meanwhile, a handle hole (511) into which a handle (4, Fig. 1) can be inserted may be formed in the shutter plate (510). At this time, the handle hole (511) is formed so that only a portion of the tool groove formed at the end of the insertion / extraction screw (330) is exposed in a normal state in which no external force is applied.

[0140] In addition, a handle insertion prevention portion is formed in the shutter plate (510) adjacent to the handle hole (511), and the insertion of the handle (4) into the tool groove can be restricted by the handle insertion prevention portion.

[0141] This shutter plate (510) has a structure and configuration that is already known, and a detailed description thereof will be omitted to avoid obscuring the gist of the present invention.

[0142] However, when the off button (222) is pressed, the interlock lever (700) is positioned at the first position, so that the shutter plate (510) is allowed to move to the left, and the handle can be coupled to the tool groove of the insertion / extraction screw (330) through the handle hole (511). As a result, insertion / extraction of the circuit breaker body (200) can be possible.

[0143] Meanwhile, a shutter module return spring may be provided to provide force for the shutter plate (510) to return to its original position.

[0144] In a normal state where no external force is applied, the shutter plate (510) is positioned by moving to the right, so that it can cover a part of the tool groove of the lead-in screw (330).

[0145] And, when the handle (4) is inserted while the restraint by the interlock lever (700) is released, the shutter plate (510) is pushed to the left by the handle (4), so that the user can rotate the insertion / extraction screw (330) using the handle (4).

[0146] Meanwhile, when the handle (4) is removed, the shutter plate (510) moves to the right by the shutter module return spring, so that a portion of the tool groove is covered by the handle insertion prevention portion.

[0147]

[0148] Meanwhile, referring again to FIGS. 5 and 6, a front cover (600) covering the front of the transport module (300) and the shutter module (500) is provided in front of the transport module (300).

[0149] This front cover (600) may be composed of a front cover plate (610) and a receiving groove cover member (620).

[0150] At this time, a restraint module (400) is installed on the front cover plate (610).

[0151] The restraint module (400) largely includes a key assembly (450, 460), a restraint plate (410), and a restraint module return spring (440).

[0152] A key assembly receiving groove (611) may be formed on the front of the front cover plate (610).

[0153] A restraint plate (410) can be installed to be movable in a horizontal direction at a portion corresponding to the key assembly receiving groove (611) on the rear of the front cover plate (610).

[0154] The key assembly receiving groove (611) can be opened forward.

[0155] In addition, a key assembly hole may be formed on the bottom surface of the key assembly receiving groove (611). The key assembly (450, 460) may penetrate the key assembly hole and be coupled with the restraint plate (410), thereby allowing the restraint plate (410) to move in a horizontal direction.

[0156] Accordingly, the air circuit breaker (1) according to one embodiment of the present invention can separate the key assembly (450, 460) without disassembling the cover plate from the transfer module (300), so that maintenance, repair, and replacement of the key assembly (450, 460) are easy, thereby immediately reflecting customer needs.

[0157] Meanwhile, the key assembly (450, 460) may be replaced with another actuating means for moving the restraint plate (410). For example, the key assembly (450, 460) may be replaced with an electronic device comprising an electronic interface operable by a user and a motor for moving the restraint plate (410).

[0158] A detailed description of these restraint plates (410) and key assemblies (450, 460) will be provided later.

[0159] Meanwhile, a receiving groove cover member (620) that can cover a key assembly receiving groove (611) may be installed on the front cover plate (610). As a result, the key assembly (450, 460) received inside the key assembly receiving groove (611) can be protected from the outside, and arbitrary access to the key assembly by a third party can be blocked. Screw grooves for screw coupling may be provided on both sides of the receiving groove cover member (620) and the key assembly receiving groove (611), respectively.

[0160] Meanwhile, the front cover plate (610) includes a handle insertion hole (613) and a handle storage hole (615).

[0161] At this time, the handle insertion hole (613) is formed at a position corresponding to the insertion / extraction screw (330), and the handle (4) can be coupled to the tool groove of the insertion / extraction screw (330) by passing through the handle insertion hole (613). In addition, the handle insertion hole (613) can be opened and closed by the horizontal movement of the shutter plate (510).

[0162]

[0163] Next, FIGS. 10 to 12 are drawings showing a key assembly and a restraining plate applied to an air circuit breaker according to one embodiment of the present invention.

[0164] Referring to this, an air circuit breaker (1) according to one embodiment of the present invention includes a restraint module (400) to simultaneously perform a function of preventing the insertion of the circuit breaker body (200) and a function of restricting the insertion and withdrawal of the circuit breaker body (200).

[0165] Meanwhile, the first key assembly (450) of the restraint module (400) may include a first rotating cylinder (452), a first key home (453), and a first key lever (454). The first rotating cylinder (452) may be rotated in one direction using a key inserted into the first key home (453).

[0166] At the rear of the first rotary cylinder (452), a first key lever (454) that rotates together with the first rotary cylinder (452) is provided. This first key lever (454) can be bent toward the restraint plate (410). The first key lever (454) can be inserted into a first key lever hole (411a) formed in the restraint plate (410).

[0167] The first key lever (454) can rotate and pressurize a portion of the inner surface of the first key lever hole (411a).

[0168] For example, when viewed from the front with reference to FIG. 12, when the first rotary cylinder (452) rotates counterclockwise, the first key lever (454) can press the right inner surface of the first key lever hole (411a) to move the restraint plate (410) to the right.

[0169] Meanwhile, the second key assembly (460) may be formed in the same shape as the first key assembly (450). That is, the second key assembly (460) may be formed of a second rotating cylinder (462), a second key home (463), and a second key lever (464), and the second rotating cylinder (462), the second key home (463), and the second key lever (464) may be formed in the same shape as the first rotating cylinder (452), the first key home (453), and the first key lever (454), respectively.

[0170] At this time, the first key assembly (450) and the second key assembly (460) may be arranged in parallel in the horizontal direction. In addition, the restraint plate (410) may be provided with a second key lever hole (411b) into which a second key lever (464) may be inserted. At this time, the lever holes (411a, 411b) may be formed along the movement direction (i.e., horizontal direction) of the restraint plate (410).

[0171] Referring to Figures 12 and 9 (c), a restraint protrusion (420) is formed protrudingly at the lower right side of the restraint plate (410).

[0172] These restraint protrusions (420) can perform the function of entering the lower part of the interlock lever (700) and supporting the lower surface of the interlock lever (700) in an upward direction when the interlock lever (700) is positioned in the first position.

[0173] Accordingly, in the air circuit breaker according to one embodiment of the present invention, even if the external force pressing the off button (222) is removed, the interlock lever (700) does not move downward, so that the circuit breaker body (200) is prevented from being closed.

[0174] Meanwhile, the restraint plate (410) can be installed horizontally movably at the rear of the front cover plate (610).

[0175] A return spring groove (415) into which a return spring (440) for a restraint module can be inserted may be formed on the upper side of the lever hole (411a, 411b) in the restraint plate (410).

[0176] A spring installation portion (430) may be provided on the inner surface of the return spring home (415) to protrude in the direction of movement (i.e., horizontal direction) of the restraint plate (410).

[0177] A restraint module return spring (440) can be installed in the spring installation section (430).

[0178] At this time, the restraint module return spring (440) may be a coil spring.

[0179] On the rear side of the front cover plate (610), a return spring support member (617) may protrude toward the restraint plate (410).

[0180] The return spring support member (617) can be inserted into one section of the return spring groove (415) of the restraint plate (410) to support one side of the restraint module return spring (440).

[0181] Accordingly, in a normal state where no external force is applied to the restraint plate (410), the restraint plate (410) can be moved away from the interlock lever (700).

[0182] When the restraint plate (410) moves toward the interlock lever (700) due to the action of an external force (e.g., force from the key lever of the key assembly), elastic force can be stored in the restraint module return spring (440).

[0183] When the external force is removed from the restraint plate (410), the restraint plate (410) can move to the right by the restoring force of the restraint module return spring (440).

[0184] Referring to the enlarged view of Fig. 5, a first guide protrusion (614) may be formed on the rear side of the front cover plate (610) along the direction of movement of the restraint plate (410) on the upper and lower sides of the restraint plate (410).

[0185] The restraint plate (410) is inserted into the inside of the first guide protrusion (614) and is guided by the first guide protrusion (614) and can move.

[0186] In addition, a second guide protrusion (616) protruding toward the restraint plate (410) may be formed on the front cover plate (610). A guide hole (413) may be formed on one side of the return spring groove (415) of the restraint plate (410) in the direction of movement (i.e., horizontal direction) of the restraint plate (410). The second guide protrusion (616) may be inserted into the guide hole (413). Accordingly, as the restraint plate (410) moves, the second guide protrusion (616) may perform a sliding movement within the guide hole (413).

[0187] Accordingly, the restraint plate (410) according to one embodiment of the present invention can be stably guided and moved by the first guide protrusion (614) and the second guide protrusion (616).

[0188] Meanwhile, a stopper (618) protruding toward the restraint plate (410) may be provided on the rear side of the front cover plate (610). The stopper (618) may be placed on the path along which the restraint plate (410) moves.

[0189] For example, based on the enlarged view of FIG. 5, there may be a plurality of stoppers (618), and they may be positioned at the upper right and lower right sides of the restraint plate (410), respectively. The stoppers (618) may perform a function of preventing the restraint plate (410) from deviating from the set movement path.

[0190]

[0191] Hereinafter, with reference again to FIG. 9, the relative movement of the restraint plate (410), the interlock lever (700), and the shutter plate (510) will be described in more detail.

[0192] Referring to (a) of Fig. 9, in the input state where the off button (222) of the circuit breaker body (200) is not pressed, the interlock lever (700) can be moved downward and positioned in the second position.

[0193] At this time, the shutter plate (510) cannot move to the left because the shutter protrusion (520) is caught by the lower part of the interlock lever (700).

[0194] Accordingly, the handle insertion prevention portion of the shutter plate (510) covers a part of the tool groove of the insertion / extraction screw, thereby restricting the insertion / extraction of the circuit breaker body (200).

[0195] Referring to (b) of Fig. 9, when the off button (222) of the circuit breaker body (200) is pressed, the interlock lever (700) can move upward and be positioned at the first position.

[0196] At this time, the shutter protrusion (520) of the shutter plate (510) may not be caught by the interlock lever (700). In addition, the shutter plate (510) may not be caught by the restraining plate (410) positioned in the release position. Accordingly, the shutter plate (510) may move to the left.

[0197] Accordingly, the shutter plate (510) can expose the tool groove of the insertion / extraction screw to the outside through the handle hole (511). Accordingly, the user can insert / extract the circuit breaker body by engaging the handle with the tool groove of the screw.

[0198] Referring to (c) of Fig. 9, the restraint projection (420) of the restraint plate (410) can enter the lower side of the interlock lever (700) as the restraint plate (410) moves to the right. Hereinafter, the position of the restraint plate (410) shown in (c) of Fig. 9 is referred to as the restraint position.

[0199] The restraint protrusion (420) located at the restraint position can support the lower part of the interlock lever (700) to fix the interlock lever (700) in the first position.

[0200] Accordingly, even if the external force pressing the off button disappears, the circuit breaker body can be prevented from being turned on.

[0201] In addition, the shutter protrusion (520) of the shutter plate (510) can be restricted from moving to the left by being caught by the restraining protrusion (420) of the restraining plate (410). As a result, the handle insertion prevention portion of the shutter plate (510) can partially cover the tool groove of the insertion / withdrawal screw, thereby restricting the insertion / withdrawal of the circuit breaker body.

[0202] That is, the restraint module (400) of the air circuit breaker according to one embodiment of the present invention can simultaneously implement the function of restraining the closing operation and the insertion / withdrawal of the circuit breaker body (200).

[0203]

[0204] Referring again to FIGS. 6 and 8 to 10, as described above, the restraint module (400) can restrict the movement of the interlock lever (700) and the shutter plate (510) through the operation of locking or unlocking the key assembly (450, 460).

[0205] In other words, both the first key assembly (450) and the second key assembly (460) can be in the unlocked state.

[0206] At this time, the restraint module (400) is in a released state, that is, the restraint plate (410) can be moved by the restoring force of the restraint module return spring (440) without being fixed in position by the key lever (454, 464). That is, the restraint plate (410) cannot restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

[0207] And, the first key assembly (450) may be in a locked state and the second key assembly (460) may be in an unlocked state.

[0208] At this time, the movement of the restraint plate (410) is restricted by the first key lever (454). That is, the restraint plate (410) is fixed in position at the restraint position and can restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

[0209] And, the first key assembly (450) may be in an unlocked state and the second key assembly (460) may be in a locked state.

[0210] At this time, the movement of the restraint plate (410) is restricted by the second key lever (464). That is, the restraint plate (410) is fixed in position at the restraint position and can restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

[0211] And, both the first key assembly (450) and the second key assembly (460) can be in a locked state. At this time, the restraint plate (410) is fixed in a restraint position by the first key lever (454) and the second key lever (464) and cannot be moved. That is, the restraint plate (410) can restrict the movement of the interlock lever (700) and the movement of the shutter plate (510).

[0212] As described above, except when all key assemblies (450, 460) are released, when one or more key assemblies (450, 460) are in a locked state, the downward movement of the interlock lever (700) is restricted, the off button (222) remains pressed, thus preventing the insertion action, and the movement of the shutter plate (510) is restricted, thus preventing the insertion and withdrawal of the circuit breaker body (200).

[0213] The first key assembly (450) and the second key assembly (460) can be combined and used in any suitable manner and for any suitable purpose. That is, the first key assembly (450) and the second key assembly (460) can be used independently as well as in parallel.

[0214]

[0215] Next, FIG. 13 is a drawing showing an interlock lever adjustment module and an interlock lever applied to an air circuit breaker according to one embodiment of the present invention, and FIGS. 14 and 15 are schematic drawings showing a process of inserting a circuit breaker body into a cradle in an air circuit breaker according to one embodiment of the present invention.

[0216] As described above, in the air circuit breaker (1) according to one embodiment of the present invention, the restraint plate (410) of the restraint module (400) moves horizontally to a restraint position (locked position) by the action of an external force (for example, force by a key lever of a key assembly).

[0217] At this time, the restraint protrusion (420) formed at the lower right side of the restraint plate (410) enters the lower part of the interlock lever (700) located at the first position and supports the lower side of the interlock lever (700) in the upward direction.

[0218] Accordingly, in the air circuit breaker (1) according to one embodiment of the present invention, even if the external force pressing the off button (222) is removed, the interlock lever (700) does not move downward.

[0219] That is, the restraint projection (420) of the restraint plate (410) located at the restraint position supports the lower part of the interlock lever (700) to fix the interlock lever (700) in the first position.

[0220] Meanwhile, the first position fixing of the interlock lever (700) by the restraint module (400) must be performed while the circuit breaker body (200) is inserted and positioned in the cradle (100).

[0221] However, due to the user's lack of skill in operation, etc., there may be a case where the circuit breaker body (200) is not inserted into the cradle (100) and is in a locked state, i.e., the interlock lever (700) is fixed in the first position.

[0222] If the fixed state of the interlock lever (700) is not confirmed and the circuit breaker body (200) is inserted into the cradle (100), the interlock lever (700) fixed in the first position, i.e., in the raised state, may be loaded by the weight of the circuit breaker body (200) into which the protrusion (710) is inserted and may be pressed against the circuit breaker body (200).

[0223] If the interlock lever (700) is subjected to a load while fixed in this manner, there is a risk that the related components constituting the interlock device may be damaged.

[0224] Referring again to FIGS. 2 to 4 and FIGS. 7 and 8 together, an air circuit breaker (1) according to one embodiment of the present invention includes an interlock lever adjustment module (800) to prevent damage to the interlock lever (700) and to prevent the interlock device from being locked when the circuit breaker body (200) is not inserted into the cradle (100).

[0225] The interlock lever adjustment module (800) performs the function of forcibly fixing the interlock lever (700) to a lowered second position rather than a raised first position when the circuit breaker body (200) is not inserted into the cradle (100). In other words, when the circuit breaker body (200) is not inserted into the cradle (100), the locking of the restraining plate (410) constituting the interlock device can be prevented.

[0226]

[0227] The configuration and operation of this interlock lever control module (800) are described in more detail as follows.

[0228] As described above, an air circuit breaker (1) according to one embodiment of the present invention includes a cradle (100), a circuit breaker body (200) that is inserted and removed from the cradle (100), a transfer module (300) that is provided in the cradle (100) and inserts and removes the circuit breaker body (200), and an interlock lever (700).

[0229] At this time, the interlock lever (700) is provided on the front side of the transfer module (300), for example.

[0230] And, the interlock lever (700) can move vertically to the first position and the second position described above according to the implementation of the function of the interlock device.

[0231] At this time, the interlock lever (700) in the first position has a protrusion height (h2, Fig. 15) that protrudes higher than the upper part (323) of the cover plate (320) of the transfer module (300) so that the upper protrusion (710) is higher than the lower surface (250, Figs. 14 and 15) of the circuit breaker body (200) inserted into the cradle (100).

[0232] Additionally, the interlock lever (700) in the second position may have a height such that the protrusion (710) forming the upper side is lower than the bottom surface of the circuit breaker body (200).

[0233] At this time, the interlock lever adjustment module (800) is provided so that the vertical movement of the interlock lever (700) can be limited so that it is fixed in the second position when the circuit breaker body (200) is not inserted into the cradle (100).

[0234] In addition, the interlock lever adjustment module (800) can allow vertical movement so that the interlock lever (700) can move to the first position as the circuit breaker body (200) is inserted into the cradle (100).

[0235] Meanwhile, in one embodiment, the interlock lever control module (800) is shown as being provided on one side of the transport module (300), but of course, its position is not limited as long as the vertical movement of the interlock lever (700) can be restricted as needed.

[0236] Referring to FIGS. 3, 4, and 13 together, in one embodiment, the interlock lever adjustment module (800) has a structure that allows or restricts the movement of the interlock lever (700) as it seesaws due to an external force applied as the circuit breaker body (200) is inserted into the cradle (100).

[0237] To this end, the interlock lever adjustment module (800) may largely include a body portion (810), a head portion (830), and a pressing portion (840).

[0238] The body part (810) can be rotatably fixed to a hinge axis (820) formed to protrude from one side plate part (322) of the transport module (300).

[0239] To this end, the body part (810) includes a hinge hole (811) through which a hinge axis (820) is fixed. The body part (810) is not limited to a single shape, and can be formed in various shapes, such as a cylinder, a square box, or a polygon, as long as it can be rotated by the hinge axis (820).

[0240] Meanwhile, the head portion (830) forms one side of the body portion (810) and has a protrusion height (h1, Fig. 14) that protrudes upward from the transport module (300).

[0241] Accordingly, the head portion (830) can be rotated toward the rear while being pushed by the bottom surface (250) of the circuit breaker body (200) being introduced.

[0242] Preferably, the head portion (830) has a gently curved upper surface so that the circuit breaker body (200) is not damaged during the process of being inserted from the front to the rear.

[0243] Meanwhile, the pressing part (840) forms the other side of the body part (810), and can forcibly maintain the second position by pressing the interlock lever (700) while the circuit breaker body (200) is not inserted into the cradle (100).

[0244] This pressing part (840) can seesaw in accordance with the rotation of the head part (830) described above, thereby allowing the interlock lever (700) to move to the first position.

[0245] At this time, the interlock lever (700) has a pressing projection (730, Fig. 13) protruding toward the interlock lever adjustment module (800), and the pressing portion (840) may be in the shape of a bar extending from the body portion (810) toward the interlock lever (700) to press the pressing projection (730) from above.

[0246] Meanwhile, the interlock lever adjustment module (800) may further include an elastic member (850) provided on the hinge axis (820) to support the body portion (810).

[0247] For example, such elastic member (850) may be in the form of a torsion spring.

[0248] By utilizing the elastic force of the elastic member (850) as described above, the interlock lever adjustment module (800) maintains a shape in which the head portion (830) protrudes upward as shown in FIG. 14. In addition, accordingly, the pressing portion (840) always maintains a state of pressing the pressing projection (730) of the interlock lever (700) when no external force is applied (when the circuit breaker body (200) is not inserted into the cradle (100). Accordingly, the interlock lever (700) always maintains the lowered second position when no external force is applied (when the circuit breaker body (200) is not inserted into the cradle (100).

[0249] Meanwhile, the elastic member (850) can provide a restoring force so that the body part (810) returns to its original position when the circuit breaker body (200) is withdrawn from the cradle (100). Accordingly, when the circuit breaker body (200) is withdrawn from the cradle (100), the head part (830) protrudes again toward the top of the transport module (300), and the pressing part (840) presses the pressing projection (730) of the interlock lever (700) again according to the seesaw motion, so that the interlock lever (700) is lowered again to the second position.

[0250] As described above, the interlock lever adjustment module (800) is positioned on one side of the upper cover plate (310) of the transport module (300), specifically, on the outside of the side plate (322) of the upper cover plate (310) in a position adjacent to the interlock lever (700).

[0251] At this time, the upper cover plate (310) forms an interlock lever hole (321) through which the upper protrusion (710) of the interlock lever (700) can move vertically as described above.

[0252] In addition, a flow hole (322a) is formed in the side plate (322) of the upper cover plate (310) so that the pressing part (840) of the interlock lever adjustment module (800) can move in a seesaw manner.

[0253] These fluid holes (322a) may have a circular, elliptical, or polygonal hole shape to provide a seesaw movement space for the pressing part (840).

[0254]

[0255] Referring to FIG. 14 including FIG. 2 and FIG. 13, as in the picture, since the pressing part (840) of the interlock lever adjustment module (800) presses the pressing part (730) of the interlock lever (700) using the elastic force of the elastic member (850) in a state where the circuit breaker body (200) is not inserted into the cradle (100), the interlock lever (700) always has a lowered second position.

[0256] In addition, the head portion (830) of the interlock lever adjustment module (800) protrudes from the upper portion of the transport module (300) at a height (h1).

[0257] Next, referring to FIG. 15, as in the city, when the circuit breaker body (200) is inserted into the cradle (100), the bottom surface (250) of the circuit breaker body (200) presses the head portion (830). Accordingly, the head portion (830) rotates rearward about the hinge axis (820), and the force that the pressing portion (840) was pressing on the pressing projection (730) of the interlock lever (700) is released by the seesaw motion. Accordingly, the interlock lever (700) is vertically moved from the lowered second position to the raised first position by the elastic force of the interlock lever return spring (720).

[0258] Accordingly, the interlock lever (700) can be in a state where the interlock function can be performed by the interlock device including the restraint module (400) and the shutter module (500).

[0259]

[0260] As described above, the air circuit breaker (1) according to one embodiment of the present invention enables a stable interlock function to be performed by allowing the interlock lever (700) to move from a lowered second position to a raised first position according to the process in which the circuit breaker body (200) is inserted and removed from the cradle (100).

[0261] In addition, the interlock lever adjustment module (800) fixes the interlock lever (700) in a lowered second position, thereby preventing the interlock lever (700) from being pressed against the bottom surface (250) of the circuit breaker body (200) and being damaged during the process of inserting the circuit breaker body (200) into the cradle (100).

[0262] In addition, as damage to the interlock lever (700) is prevented, damage to the associated parts constituting the interlock device associated with the interlock lever (700) can also be prevented.

[0263] Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

Claims

1. Cradle; A circuit breaker body that is inserted and removed from the above cradle; A transport module provided in the cradle to pull in and pull out the circuit breaker body; An interlock lever that moves vertically so that the upper protrusion has a first position higher than the bottom surface of the circuit breaker body and a second position lower than the bottom surface of the circuit breaker body; and An air circuit breaker, comprising an interlock lever adjustment module that restricts vertical movement of the interlock lever so that it is fixed in the second position when the circuit breaker body is not inserted into the cradle, and allows the interlock lever to move to the first position as the circuit breaker body is inserted into the cradle.

2. In paragraph 1, The above interlock lever adjustment module, A body part rotatably fixed by a hinge axis on one side of the above transport module, A head portion forming one side of the body portion, having a protruding height that protrudes above the transport module; An air circuit breaker comprising a pressing portion that forms the other side of the body portion and forcibly maintains the second position by pressing the interlock lever.

3. In paragraph 2, The above interlock lever adjustment module, An air circuit breaker further comprising an elastic member provided on the hinge axis to support the body portion and provide elasticity.

4. In paragraph 3, The above elastic member is an air circuit breaker composed of a torsion spring.

5. In paragraph 2, The above head portion is rotated while being pressed by the bottom surface of the circuit breaker body inserted into the cradle, An air circuit breaker in which the pressing part seesaws according to the rotation of the head part to allow the interlock lever to move to the first position.

6. In paragraph 5, The above head portion is an air circuit breaker having a gently curved upper surface.

7. In paragraph 2, The above interlock lever includes a pressing projection protruding toward the interlock lever adjustment module, An air circuit breaker, wherein the pressing portion has a bar shape extending toward the interlock lever so as to press the pressing projection from above.

8. In paragraph 7, The above transport module includes an upper cover plate including an upper plate and a side plate, The above upper surface cover plate, An interlock lever hole is formed in the upper part of the above upper plate through which the upper protrusion of the interlock lever penetrates, An air circuit breaker in which a flow hole that moves in a seesaw manner is formed by the pressing part penetrating the side plate.

9. In paragraph 1, An air circuit breaker comprising a restraint module having a restraint plate that is movably installed in front of the transport module, fixes the interlock lever in a first position when in a locked position, and allows the interlock lever to move from the first position to a second position when in an unlocked position.

10. In paragraph 9, A cover plate that covers the outer surface of the above transport module and has a hole formed therein; and It further includes a shutter plate positioned between the above transport module and the above cover plate and opening and closing the cover plate hole, An air circuit breaker in which the above restraint module, when moved to the locked position, fixes the shutter plate in a position to close the cover plate hole, and when moved to the unlocked position, allows the shutter plate to open and close the cover plate hole.

11. In paragraph 9, The above restraint module includes a key assembly that moves the restraint plate, An air circuit breaker in which the direction of movement of the interlock lever and the direction of movement of the restraint plate are perpendicular to each other.

12. In paragraph 9, The above restraint plate has a restraint projection formed to protrude toward the interlock lever, which restricts or allows the movement of the interlock lever, The above-mentioned restraint projection is an air circuit breaker that supports one side of the interlock lever from the second position toward the first position in the locked position.

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