Air circuit breaker provided with an insulating member

Abstract

Disclosed is an air circuit breaker provided with an insulation member. The air circuit breaker of one aspect of the invention can include: a body portion; an operating portion provided in an inner space of the body portion, in which an arc is generated by an operating motion of a movable contact with respect to a fixed contact; a plurality of arc extinguishing portions provided in an upper portion of the operating portion, which are adjacently arranged to extinguish the arc; and an insulation member arranged on both sides in a second direction of the arc extinguishing portions, respectively, in which an end portion is cut off by a pressure developed when arc extinguishing gas generated by the arc extinguishing portions is discharged, to cut off a movement space of the arc extinguishing gas between the arc extinguishing portions and the adjacent arc extinguishing portions.

Description

Technical Field

[0001] This invention relates to an air circuit breaker, and more specifically, to an air circuit breaker provided with insulating components to improve arc extinguishing performance. Background Technology

[0002] Typically, an air circuit breaker (ACB) is a device that uses air as the arc-extinguishing medium to open and close power received in a power transmission and distribution system or line, or to cut off current and protect the power system and load equipment in the event of safety faults such as overload or short circuit.

[0003] This type of air circuit breaker has a moving contact and a stationary contact that contacts the moving contact in its operating section. If the moving contact contacts the stationary contact, current flows through the circuit. If a large current flows through the circuit due to a safety fault, the moving contact separates from the stationary contact and cuts off the current in the circuit.

[0004] On the other hand, air circuit breakers need to be configured to interrupt fault current for a short time in the event of a short-circuit fault to ensure user safety and system integrity.

[0005] At this time, the current flowing between the moving and stationary contacts inside the air circuit breaker does not disappear immediately, but changes into the shape of an arc and extends.

[0006] An electric arc can be defined as a flow of electrons under high temperature and pressure. If such an arc remains inside a circuit breaker for an extended period, it may damage the components that make up the circuit breaker.

[0007] Therefore, existing air circuit breakers include a plurality of arc-extinguishing sections arranged adjacent to each other at the top to stably extinguish and discharge the electric arc.

[0008] Furthermore, the generated electric arc passes from bottom to top through the aforementioned arc-extinguishing section. At this time, as the arc pressure increases, the moving speed accelerates, and it moves along the predetermined discharge path of the arc-extinguishing section and is discharged to the outside.

[0009] Furthermore, the electric arc passing through the arc-extinguishing section is discharged to the outside of the arc-extinguishing section along with a high-temperature conductive gas (hereinafter referred to as "arc-extinguishing gas").

[0010] On the other hand, the capacitance of the power system has been increasing recently, which leads to an increase in fault voltage and fault current.

[0011] When this fault current is interrupted, the pressure inside the arc-extinguishing section inevitably increases. At this time, the arc-extinguishing gas containing the arc may be discharged not only through the predetermined discharge path of the arc-extinguishing section, but also through other parts such as the gap between the arc-extinguishing sections.

[0012] On the other hand, the upper part of the arc-extinguishing section has a steel upper cover panel. The conductive arc-extinguishing gas discharged through the gap causes a phase-to-phase short circuit between the arc-extinguishing sections, resulting in a failure to cut off.

[0013] In other words, the arc-extinguishing gas discharged from the gap makes the upper cover panel made of steel on the upper part of the arc-extinguishing section highly conductive, thereby causing insulation failure between adjacent arc-extinguishing sections and resulting in phase-to-phase short circuit and disconnection failure.

[0014] Therefore, there is an urgent need to develop an air circuit breaker that can achieve complete insulation between the arc-extinguishing parts and ensure high breaking performance even under high voltage / current. Summary of the Invention

[0015] The problem that the invention aims to solve

[0016] The present invention is intended to solve the problems described above. The purpose of the present invention is to provide an air circuit breaker with insulating components that can improve arc extinguishing performance.

[0017] In addition, an air circuit breaker with insulating members is provided to achieve complete insulation between the arc-extinguishing parts and ensure high breaking performance even under high voltage / current.

[0018] In addition, an air circuit breaker with insulating members is provided that, while maintaining assemblability, utilizes the shape deformation caused by the pressure when the arc-extinguishing gas is discharged to cut off the arc-extinguishing gas movement space between the arc-extinguishing parts, thereby achieving complete insulation between the arc-extinguishing parts.

[0019] The subject matter of this invention is not limited to the subject matter mentioned above. Other subject matters not mentioned can be clearly understood by those skilled in the art through the following description.

[0020] Technical solutions to the problem

[0021] According to one aspect of the present invention, an air circuit breaker provided with an insulating member is provided.

[0022] An air circuit breaker includes: a body; an actuating section disposed within the interior space of the body, wherein a moving contact actuates relative to a stationary contact to generate an electric arc; a plurality of arc-extinguishing sections disposed on the upper part of the actuating section and arranged adjacently to extinguish the electric arc; and an insulating member disposed on both sides of the arc-extinguishing section in a second direction, the ends of which are expanded by the pressure of the arc-extinguishing gas generated by the arc-extinguishing section to cut off the movement space of the arc-extinguishing gas between the arc-extinguishing section and the adjacent arc-extinguishing section.

[0023] At this time, the arc-extinguishing part includes an upper frame and an upper cover panel that covers the upper surface of the upper frame.

[0024] Furthermore, one end of the insulating member is fixed between the upper frame and the upper cover panel.

[0025] As an example, the insulating member includes: a fixing portion fixed between the upper frame and the upper cover panel; a bending portion bent and extending from the end of the fixing portion to surround the side of the upper cover panel; and a cutting portion, which is plate-shaped, bent and extending from the end of the bending portion to cover one side of the upper surface of the upper cover panel in a first direction.

[0026] At this time, the fixing part and the bending part may have a length corresponding to the length of the upper cover panel in the first direction.

[0027] At this time, the cut portion may have a length longer than the length of the upper cover panel in the first direction.

[0028] On the other hand, the upper cover panel is formed with a plurality of through-holes. In this case, the cut-off portion of the insulating member is arranged to cover a portion of the vent holes located at both ends in the second direction.

[0029] At this time, the fixing part has a fastening hole through which the fastening member passes.

[0030] At this time, the insulating member can be elastic so that the unfolded end folds back to its original state to maintain its shape when the discharge of the arc-extinguishing gas stops.

[0031] At this point, the insulating component can be formed of a flexible material.

[0032] Invention Effects

[0033] According to the above configuration, the air circuit breaker of the present invention, which is provided with insulating members, includes insulating members that expand under pressure when the arc-extinguishing gas is discharged on both sides of the arc-extinguishing section in the second direction, thereby preventing insulation breakdown between adjacent arc-extinguishing sections and improving arc-extinguishing performance.

[0034] In addition, while maintaining assemblability, complete insulation can be achieved by cutting off the movement space of the arc-extinguishing gas between the arc-extinguishing parts through the shape deformation of the cut-off part of the insulating member generated by the pressure when the arc-extinguishing gas is discharged, thereby ensuring high cutting performance even under high voltage / current.

[0035] The effects of the present invention are not limited to those described above, but should be understood to include all effects that can be inferred from the composition of the invention as described in the detailed description or claims of the present invention. Attached Figure Description

[0036] Figure 1 This is a diagram illustrating an air circuit breaker with insulating components according to an embodiment of the present invention.

[0037] Figure 2 and Figure 3 This is a diagram illustrating an example of an arc-extinguishing section used in an air circuit breaker equipped with an insulating member, according to an embodiment of the present invention.

[0038] Figure 4 and Figure 5 This is a diagram illustrating the arrangement and operating state of the insulating members in the arc-extinguishing section of an air circuit breaker equipped with insulating members according to an embodiment of the present invention.

[0039] Figure 6 and Figure 7 This diagram illustrates the state in which, when arc-extinguishing gas is discharged from an air circuit breaker equipped with an insulating member according to an embodiment of the present invention, the cutting portion of the insulating member unfolds and cuts off the movement space of the arc-extinguishing gas between the arc-extinguishing part and the adjacent arc-extinguishing part.

[0040] Best practice

[0041] The present invention provides, as a preferred embodiment, an air circuit breaker provided with insulating members, comprising: a body portion; an actuating portion disposed within the internal space of the body portion, wherein a moving contact actuates relative to a stationary contact to generate an electric arc; a plurality of arc-extinguishing portions disposed on the upper part of the actuating portion and arranged adjacently to extinguish the electric arc; and insulating members respectively disposed on both sides of the arc-extinguishing portions in a second direction, the ends of which are expanded by the pressure of the arc-extinguishing gas generated by the arc-extinguishing portions to cut off the movement space of the arc-extinguishing gas between the arc-extinguishing portions and adjacent arc-extinguishing portions. Detailed Implementation

[0042] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, enabling those skilled in the art to readily implement the invention. The present invention can be implemented in various different forms and is not limited to the embodiments described herein. For clarity, parts unrelated to the description have been omitted from the drawings, and the same reference numerals are used throughout the specification for the same or similar constituent elements.

[0043] The words and terms used in this specification and claims should not be interpreted as having their usual or dictionary meanings, but rather as meanings and concepts consistent with the technical ideas of the invention, based on the principle that the inventors define terms and concepts in order to best describe their invention.

[0044] Therefore, the embodiments described in this specification and the configuration shown in the accompanying drawings correspond to a preferred embodiment of the present invention, but do not represent all the technical ideas of the present invention. Thus, this configuration has various equivalents and modifications since the application of the present invention.

[0045] In this specification, terms such as “comprising” or “having” are used to describe the presence of features, figures, steps, actions, constituent elements, components or combinations thereof described in the specification, and should not be construed as pre-excluding the presence or additional possibilities of one or more other features, figures, steps, actions, constituent elements, components or combinations thereof.

[0046] Unless otherwise specified, the location of a component "in front of," "behind," "above," or "below" another component includes not only its direct contact with the other component and its arrangement in the "front," "behind," "above," or "below," but also the situation where other components are arranged between them. Furthermore, unless otherwise specified, the "connection" of one component to another includes not only direct connection but also indirect connection.

[0047] The terms "X-axis," "Y-axis," and "Z-axis" used in this description are understood with reference to the coordinate system shown in the accompanying drawings. Furthermore, the X-axis direction is referred to as the first direction, the Y-axis direction as the second direction, and the Z-axis direction as the third direction. However, this is merely an example based on the concept of relativity. The first to third directions, as well as the coordinate axes (X, Y, Z axes), are introduced only to illustrate the relative positions of the constituent elements and do not define the absolute positions of the constituent elements.

[0048] Furthermore, in describing the present invention, specific descriptions of related well-known functions or structures will be omitted to avoid obscuring the spirit of the present invention.

[0049] Hereinafter, an embodiment of the present invention, an air circuit breaker provided with an insulating member, will be described with reference to the accompanying drawings.

[0050] like Figures 1 to 7 As shown, in one embodiment of the present invention, an air circuit breaker 1 with insulating members includes insulating members 100 on both sides of the arc-extinguishing part 40 in the second direction. The cutting portion 130 of the insulating member 100 is expanded by the pressure when the arc-extinguishing gas is discharged, thereby preventing the insulation between adjacent arc-extinguishing parts 40 from being damaged and improving the arc-extinguishing performance.

[0051] Therefore, an air circuit breaker 1 with an insulating member according to an embodiment of the present invention generally includes a body part 10, an operating part 20, a terminal part 30, an arc extinguishing part 40, and an insulating member 100.

[0052] First, the body part 10 forms the shape of the air circuit breaker 1, has a space inside, and can install various components for the operation of the air circuit breaker 1.

[0053] In other words, the body part 10 is used as a housing.

[0054] Furthermore, the body 10 is made of a material with high heat resistance and high rigidity in order to prevent damage to the various components installed inside it and to prevent damage from electric arcs generated inside it.

[0055] In the accompanying drawings, the main body 10 is shown in the shape of a square box, but it is not limited to this. Obviously, it can have various forms, as long as it can accommodate the components for the operation of the air circuit breaker 1 and can be energized from the outside.

[0056] Furthermore, the actuating part 20 is arranged in the internal space of the main body part 10, and is the part that generates an electric arc by the movement of the moving contact relative to the stationary contact, while the terminal part 30 is the part that performs connection with other devices.

[0057] The operating part 20 and the terminal part 30 can adopt the structure of a known air circuit breaker. Specific descriptions of the relevant known functions or configurations will be omitted to avoid obscuring the main points of the present invention.

[0058] However, the actuating unit 20 includes a moving contact (not shown) and a stationary contact (not shown) that contacts the moving contact. If the moving contact contacts the stationary contact, current flows through the circuit. If a large current flows through the circuit due to a safety fault, the moving contact separates from the stationary contact and cuts off the current in the circuit.

[0059] At this time, the current flowing between the moving contact and the stationary contact of the actuating part 20 does not disappear immediately, but changes into the shape of an arc and extends.

[0060] In order to stably extinguish this arc and discharge it to the outside, an embodiment of the present invention provides an air circuit breaker 1 with insulating members, which includes a plurality of arc-extinguishing parts 40 arranged adjacent to each other in a second direction on the upper part of the body 10 (see reference). Figure 1 , Figure 6 as well as Figure 7 ).

[0061] Furthermore, the generated electric arc, together with the arc-extinguishing gas, passes through the arc-extinguishing section 40 from the third direction downwards, thereby moving along the predetermined discharge path of the arc-extinguishing section 40 and being discharged to the outside.

[0062] See below for reference Figures 1 to 5 This arc-extinguishing part 40 will be described in more detail.

[0063] The arc-extinguishing part 40 is provided on the upper part of the actuating part 20 in the main body part 10 and performs the initial arc extinguishing.

[0064] Therefore, the arc-extinguishing section 40 has a shape that allows it to be introduced or extended from the upper frame of the body section 10. The accompanying drawings show three arc-extinguishing sections 40 arranged adjacent to each other and close together along the second direction of the body section 10. However, this is not a limitation; obviously, more may be provided depending on the size of the air circuit breaker 1.

[0065] As one embodiment, the arc-extinguishing part 40 has an upper frame 41 in the shape of a picture frame and a plate-shaped side frame 42 at mutually spaced positions on both sides of the upper frame 41 in a second direction. A plurality of grids 43 are provided between the side frames 42. An upper cover panel 46 is attached to the upper part of the upper frame 41. A plurality of exhaust holes 46a for arc-extinguishing gas to pass through are formed through the upper cover panel 46.

[0066] The grid 43 is made of a magnetic material that exerts an attractive force on the electric arc, which is an electron flow, and guides the generated electric arc to the arc-extinguishing section 40.

[0067] Such grids 43 can be spaced apart and stacked in multiples along a first direction within the internal space of the arc-extinguishing section 40.

[0068] Through the space formed by a plurality of grids 43 separated from each other, the incoming electric arc can be divided and flow, thereby increasing the pressure of the electric arc, the moving speed of the electric arc, and the extinguishing speed of the arc.

[0069] Depending on the requirements, a shielding plate 44 with through holes 44a and a plurality of mesh members 45 may be provided between the upper part of this grid 43 and the upper cover panel 46. The shielding plate 44 performs the function of controlling the amount of high-temperature arc-quenching gas passing through or supporting the components assembled at the lower part from the upper part.

[0070] Since the grid 43, shielding plate 44 and mesh member 45 are known functions, a detailed description of their configuration will be omitted to avoid obscuring the main points of the invention.

[0071] On the other hand, as described above, in an air circuit breaker 1 provided with insulating members according to an embodiment of the present invention, the arc extinguishing part 40 guides the discharge path of the arc extinguishing gas in the form of a box including the above-mentioned components, and is located on the upper part of the actuating part 20 adjacent to the moving contact and the stationary contact.

[0072] At this time, the upper steel cover plate 46 of the arc extinguishing section 40 is arranged close to another upper cover plate 46 of the arc extinguishing section 40 that is adjacent to it.

[0073] Furthermore, the arc-extinguishing part 40 is a structure that can be introduced or drawn out and connected to the upper part of the main body 10, and a gap 11 that allows gas flow is inevitably formed between it and the upper frame of the connected main body 10. Figure 1 ) (reference Figure 1 ).

[0074] Therefore, the arc-extinguishing section 40 of the air circuit breaker 1 with insulating members applied in an embodiment of the present invention further includes an insulating member 100 to prevent conductive arc-extinguishing gas from being discharged from the gap 11 and causing a phase-to-phase short circuit between adjacent arc-extinguishing sections 40.

[0075] Refer again Figures 2 to 4 The insulating member 100 has a bent panel (plate) shape, which is arranged on both sides of the arc extinguishing part 40 in the second direction.

[0076] Furthermore, as the end of the arc-extinguishing section 40 is discharged from the arc-extinguishing gas generated by the arc-extinguishing section 40, the pressure is directed to both sides in the second direction, i.e., left and right, cutting off the movement space of the arc-extinguishing gas between the arc-extinguishing section 40 and the adjacent arc-extinguishing section 40.

[0077] In other words, the arc-extinguishing gas flowing out through the gap 11 is blocked by the insulating members 100 that are deployed in the adjacent arc-extinguishing sections 40, thereby preventing the occurrence of phase-to-phase short circuits between the upper steel cover panels 46 of the arc-extinguishing sections 40.

[0078] On the other hand, this insulating member 100 can be insulating paper manufactured by compressing paper. In other words, the insulating member 100 can obviously be made of various materials, as long as it is formed of an insulating material and can be formed into a thin panel (board) shape like paper. For example, various synthetic resin materials such as rubber or epoxy resin can also be used.

[0079] On the other hand, as described above, the arc extinguishing part 40 includes an upper frame 41 and an upper cover panel 46 that covers the upper surface of the upper frame 41.

[0080] At this time, the aforementioned insulating member 100 is arranged such that one end is inserted and fixed between the upper frame 41 and the upper cover panel 46.

[0081] As a specific example, the insulating member 100 includes a fixing part 110, a bending part 120, and a cutting part 130.

[0082] The fixing part 110 of the insulating member 100 is fixed between the upper frame 41 and the upper cover panel 46 of the arc-extinguishing part 40. As an example, it may have a panel (plate) shape and may have a length corresponding to the length of the upper frame 41 or the upper cover panel 46 in a first direction. However, it is not limited to this and can obviously have various shapes, as long as the fixing force can be maintained between the upper frame 41 and the upper cover panel 46 of the arc-extinguishing part 40 under the pressure generated when the arc-extinguishing gas is discharged.

[0083] On the other hand, this fixing part 110 has a fastening hole 111 through which a fastening member passes. The fixing part 110 is fixedly installed on the upper frame 41 by a fastening member that is engaged with the fastening hole 111. Therefore, even under the pressure of the discharged arc-extinguishing gas, the position of the insulating member 100 will not be dislodged.

[0084] In addition, such as Figure 3 As shown, the upper frame 41 and the upper cover panel 46 of the arc extinguishing part 40 are joined together in a tight fit using fastening components such as bolts.

[0085] As described above, when the upper frame 41 and the upper cover panel 46 are fastened together in a tight fit, the fixing part 110 of the insulating member 100 arranged between them is squeezed, so that even under the pressure of venting more arc-extinguishing gas, the position of the insulating member 100 can remain in the correct position without coming off.

[0086] Furthermore, the bent portion 120 of the insulating member 100 has a shape in which it is bent and extended from the end of the aforementioned fixing portion 110 and can surround the side of the upper cover panel 46.

[0087] On the other hand, the aforementioned fixing part 110 and bending part 120 have lengths corresponding to the length of the upper cover panel 46 in the first direction, so that the conductive arc-extinguishing gas flowing out through the gap 11 does not come into contact with the adjacent arc-extinguishing part 40, and can completely cut off the side of the upper cover panel 46.

[0088] In other words, preferably, the fixing part 110 and the bending part 120 completely surround the side of the upper cover panel 46, thereby fundamentally cutting off the penetration of the arc-extinguishing gas discharged from the arc-extinguishing part 40.

[0089] Furthermore, the cut portion 130 of the insulating member 100 is a shape in which the end of the bent portion 120 is bent again and extended to the upper cover panel 46 side, and has a plate shape that can cover the upper surface side of the upper cover panel 46 in the first direction.

[0090] On the other hand, the aforementioned upper cover panel 46 includes a plurality of vent holes 46a extending through it for discharging arc-extinguishing gases. The accompanying drawings show that the vent holes 46a have a square shape, but are not limited to this; they can obviously have various shapes such as circular or elliptical, as needed.

[0091] Furthermore, referring to Figure 4 The cut-off portion 130 of the aforementioned insulating member 100 is arranged to cover a portion of the aforementioned vent 46a arranged on both end sides in the second direction of the upper cover panel 46.

[0092] In other words, the cut-off portion 130 has a length d1 that extends to cover a portion of the vent hole 46a.

[0093] According to the configuration described above, when the conductive arc-extinguishing gas is discharged to the outside through the exhaust port 46a under pressure, the shape of the cut-off portion 130 of the insulating member 100 is deformed to expand to both sides in the second direction of the arc-extinguishing portion 40 (see reference). Figure 4 and Figure 5 ).

[0094] In other words, the cutting part 130 rotates about the upper end of the bending part 120 as an axis and unfolds to both sides of the arc extinguishing part 40.

[0095] As described above, the cutting section 130 cuts off the movement space of the arc-extinguishing gas between the arc-extinguishing section 40 and the adjacent arc-extinguishing section 40, fundamentally preventing phase-to-phase short circuits between the arc-extinguishing sections (see reference). Figure 7 ).

[0096] On the other hand, as needed, the cutting portion 130 can obviously be extended to be longer than the length of the upper cover panel 46 in the first direction, so as to cut off the arc-extinguishing gas more completely.

[0097] On the other hand, in an embodiment of the present invention, the insulating member 100 of the air circuit breaker 1 provided with the insulating member in the arc extinguishing section 40 may be elastic, so that it can be deployed or restored to its original state as the arc extinguishing gas is discharged and the discharge stops.

[0098] The unfolded end of the insulating member 100, namely the cut-off portion 130, unfolds around the bending portion 120 as an axis due to the discharge pressure when the arc-extinguishing gas is discharged. When the discharge of the arc-extinguishing gas stops (when it is not generated), it can be folded again and restored to its original state to maintain its shape.

[0099] In other words, the insulating member 100 can be formed of a flexible material and has elasticity.

[0100] Refer again Figure 4 and Figure 5 as well as Figure 6 and Figure 7The following describes an air circuit breaker 1 equipped with an insulating member in an embodiment of the present invention, in which the complete insulation between the arc-extinguishing parts is achieved by the shape deformation of the insulating member 100 caused by the pressure when the arc-extinguishing gas is discharged.

[0101] As described above, in an embodiment of the present invention, the arc-extinguishing portion 40 of the air circuit breaker 1 is provided with insulating members 100 including cutting portions 130 on both sides in the second direction.

[0102] Furthermore, the arc-extinguishing parts 40 are introduced or extended in a plurality of units between the upper part of the main body 10 and the upper part of the actuating part 20. These plurality of arc-extinguishing parts 40 are arranged to be adjacent and close to each other in the second direction of the main body 10.

[0103] Figure 6 This is the normal energized state of the air circuit breaker 1. At this time, the insulating member 100, which is combined with the arc-extinguishing part 40, is arranged such that the cutting part 130 is in contact with the top surface of the upper cover panel 46 of the arc-extinguishing part 40.

[0104] and, Figure 7 It shows in Figure 6 The state of air circuit breaker 1 when a short circuit fault occurs.

[0105] At this time, the actuating unit 20 separates the moving contact from the stationary contact and cuts off the current in the circuit.

[0106] At this time, the current flowing between the moving contact and the stationary contact of the actuating part 20 does not disappear immediately, but changes into the shape of an arc and extends. The generated arc is guided to the arc extinguishing part 40, and together with the arc extinguishing gas, it is discharged to the outside through the exhaust hole 46a formed on the upper cover panel 46 of the arc extinguishing part 40.

[0107] On the other hand, at this time, the arc-extinguishing gas discharged through the exhaust port 46a will push out the cut-off portion 130 of the insulating member 100, and the cut-off portion 130 will rotate and unfold about the bending portion 120 (see reference). Figure 7 ).

[0108] As described above, the cut-off portion 130 of the unfolded insulating member 100, together with the unfolded cut-off portion 130 of the adjacent arc-extinguishing portion 40, cuts off the movement space of the arc-extinguishing gas between the arc-extinguishing portion 40 and the adjacent arc-extinguishing portion 40.

[0109] As described above, by forming insulation between the arc-extinguishing sections, it is possible to prevent the insulation between the steel upper cover panels 46 from being damaged and to fundamentally cut off the phase-to-phase short circuit.

[0110] On the other hand, if the discharge of arc-extinguishing gas is stopped after discharge, the cut portion 130 of the insulating member 100 will fold again, and as... Figure 6As shown, it returns to its original state of contact with the top surface of the upper cover panel 46 of the arc extinguishing section 40 and maintains its shape.

[0111] As described above, in one embodiment of the present invention, an air circuit breaker 1 equipped with insulating members includes insulating members 100 on both sides of the arc-extinguishing section 40 in the second direction, which have cut-off sections 130 that expand under pressure when the arc-extinguishing gas is discharged, so as to prevent insulation breakdown between adjacent arc-extinguishing sections 40 and arc-extinguishing sections 40, thereby improving arc-extinguishing performance.

[0112] Furthermore, since the insulating member 100 is a flexible material and has elasticity, it is possible to cut off the movement space of the arc-extinguishing gas between the arc-extinguishing parts 40 by the shape deformation of the cutting part 130 while maintaining the assemblability of the air circuit breaker 1 including the arc-extinguishing part 40, thereby performing complete insulation.

[0113] Therefore, the air circuit breaker 1 of the present invention, which is equipped with insulating components, can ensure high breaking performance even under high voltage / current.

[0114] The embodiments of the present invention have been described, but the technical concept of the present invention is not limited to the embodiments presented in this specification. Those skilled in the art who understand the technical concept of the present invention can easily propose other embodiments by adding, changing, deleting, or supplementing the constituent elements within the same technical concept, and these also fall within the technical concept of the present invention.

Claims

1. An air circuit breaker provided with an insulating member, wherein, include: Body part; An actuating part is provided in the internal space of the main body, and the moving contact moves relative to the stationary contact to generate an electric arc. A plurality of arc-extinguishing parts are disposed on the upper part of the actuating part and arranged adjacently to extinguish the electric arc; as well as Insulating components are respectively arranged on both sides of the arc-extinguishing part in the second direction. The ends are expanded by the pressure when the arc-extinguishing gas generated by the arc-extinguishing part is discharged, thereby cutting off the movement space of the arc-extinguishing gas between the arc-extinguishing part and the adjacent arc-extinguishing part.

2. The air circuit breaker with insulating components according to claim 1, wherein, The arc-extinguishing unit includes an upper frame and an upper cover panel that covers the upper surface of the upper frame. One end of the insulating component is fixed between the upper frame and the upper cover panel.

3. The air circuit breaker with insulating components according to claim 2, wherein, The insulating component includes: A fixing part is fixed between the upper frame and the upper cover panel; A bent portion, which bends and extends from the end of the fixing portion, surrounds the side of the upper cover panel; and The cut-off portion is plate-shaped, bent and extended from the end of the bending portion, and covers one side of the upper surface in a first direction of the upper cover panel.

4. The air circuit breaker with insulating components according to claim 3, wherein, The fixing part and the bending part have lengths corresponding to the length of the upper cover panel in a first direction.

5. The air circuit breaker with insulating components according to claim 3, wherein, The cut portion has a length that is longer than the length of the upper cover panel in the first direction.

6. The air circuit breaker with insulating components according to claim 3, wherein, The upper cover panel has a plurality of through-holes for ventilation. The cut-off portion is arranged to cover a portion of the exhaust port located at both ends in the second direction.

7. The air circuit breaker with insulating components according to claim 3, wherein, The fixing part has a fastening hole through which the fastening member passes.

8. The air circuit breaker with insulating components according to claim 1, wherein, The insulating member is elastic so that the unfolded end folds back to its original state to maintain its shape when the discharge of the arc-extinguishing gas stops.

9. The air circuit breaker with insulating components according to claim 1, wherein, The insulating component is formed of a flexible material.

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