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WO2025084635A1 - Disjoncteur à boîtier moulé - Google Patents

Disjoncteur à boîtier moulé Download PDF

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Publication number
WO2025084635A1
WO2025084635A1 PCT/KR2024/014162 KR2024014162W WO2025084635A1 WO 2025084635 A1 WO2025084635 A1 WO 2025084635A1 KR 2024014162 W KR2024014162 W KR 2024014162W WO 2025084635 A1 WO2025084635 A1 WO 2025084635A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcing member
receiving portion
base cover
member receiving
circuit breaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2024/014162
Other languages
English (en)
Korean (ko)
Inventor
김정원
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LS Electric Co Ltd
Original Assignee
LS Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LS Electric Co Ltd filed Critical LS Electric Co Ltd
Publication of WO2025084635A1 publication Critical patent/WO2025084635A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • a molded case circuit breaker is a type of circuit breaker that is an electrical device that cuts off current to prevent electrical accidents when abnormal currents such as leakage current or overcurrent occur.
  • a typical circuit breaker has fixed contacts and movable contacts inside.
  • normal current not abnormal current (fault current)
  • the fixed contacts and movable contacts are in contact with each other and can conduct current. Then, when an abnormal current occurs, the fixed contacts and movable contacts are separated and the current is cut off.
  • the generated arc can be defined as a flow of high temperature, high pressure electrons.
  • the heat and pressure generated inside a circuit breaker by interrupting current increases in proportion to the size of the current being interrupted.
  • the high temperature and high pressure arc that occurs when the abnormal current is interrupted generates oxides inside the base cover and also generates a gap in the base cover.
  • the oxides flow out through the gaps and flow into the case of the wiring circuit breaker.
  • the oxides contaminate the inside of the case and reduce the insulation performance of the case.
  • U.S. Patent Publication No. 2013-0334174 proposes that two pieces forming an interrupter housing are joined by bolts and nuts, and that an adhesive is used on the outer surfaces of the two pieces.
  • the purpose of the present invention is to provide a wiring circuit breaker that maintains insulation performance and withstand voltage performance at a constant level.
  • a circuit breaker comprises a case, a plurality of base assemblies accommodated in the case, and a reinforcing member.
  • the reinforcing member is arranged in the base assembly.
  • the base assembly has a base cover having a space formed therein to accommodate a fixed contact, a movable contact, and an arc extinguishing member.
  • a reinforcing member receiving portion for accommodating the reinforcing member is formed in the base cover.
  • the reinforcing member receiving portion is formed in a groove shape that is sunken from the lower surface to the upper surface of the base cover.
  • the base cover includes a first base cover and a second base cover coupled with the first base cover.
  • the reinforcing member receiving portion is formed in the first base cover and the second base cover. When the first base cover and the second base cover are coupled, one reinforcing member receiving portion is formed.
  • the reinforcing member receiving portion includes a first reinforcing member receiving portion formed at an end portion of the lower surface of the first base cover, and a second reinforcing member receiving portion formed at an end portion of the lower surface of the second base cover.
  • One reinforcing member receiving portion is formed by combining the first reinforcing member receiving portion and the second reinforcing member receiving portion.
  • the first reinforcing member receiving portion is formed by being recessed from the lower surface of the first base cover to an upper surface to a preset depth
  • the second reinforcing member receiving portion is formed by being recessed from the lower surface of the second base cover to an upper surface to a preset depth.
  • the reinforcing member receiving portion includes a first reinforcing member receiving portion formed on a side surface of an end portion of a lower surface of the first base cover, and a second reinforcing member receiving portion formed on a side surface of an end portion of a lower surface of the second base cover facing the first reinforcing member receiving portion.
  • One reinforcing member receiving portion is formed by combining the first reinforcing member receiving portion and the second reinforcing member receiving portion.
  • the first reinforcing member receiving portion is formed by being recessed in one direction from a side surface of an end portion of a lower surface of the first base cover to a preset depth
  • the second reinforcing member receiving portion is formed by being recessed in a direction opposite to the one direction from a side surface of an end portion of a lower surface of the second base cover to a preset depth.
  • first reinforcing member receiving portion is formed along an end portion of the lower surface of the first base cover
  • second reinforcing member receiving portion is formed along an end portion of the lower surface of the second base cover.
  • the reinforcing member is formed in a shape corresponding to the reinforcing member receiving portion.
  • the reinforcing member is formed in a rod shape having a preset length in one direction.
  • the reinforcing member receiving portion is formed in a groove shape having a preset length corresponding to the shape of the reinforcing member.
  • the reinforcing member is formed in a plate shape having a preset thickness and a square or rectangular planar shape.
  • the reinforcing member receiving portion is formed in a groove shape having a preset depth and a square or rectangular planar shape.
  • the reinforcing member receiving portion corresponds to a portion of the lower surface of the base cover, and the portion of the lower surface is a flat lower surface without any curves, grooves, or steps among the lower surfaces of the base cover.
  • the preset width and length of the reinforcing member are identical to the preset width and length of the reinforcing member receiving portion.
  • the reinforcing member receiving portion is formed on the inside of the lower surface of the base cover.
  • the reinforcing member is attached to the reinforcing member receiving portion by an adhesive.
  • a circuit breaker for wiring includes a case, a plurality of base assemblies accommodated in the case, and a reinforcing member.
  • the reinforcing member is arranged in the base assembly.
  • the base assembly has a base cover having a space formed therein to accommodate a fixed contactor, a movable contactor, and an arc extinguishing member.
  • the base cover includes a first base cover and a second base cover coupled with the first base cover.
  • the reinforcing member is arranged between an end portion of a lower surface of the first base cover and an end portion of a lower surface of the second base cover.
  • the longitudinal shape of the reinforcing member corresponds to the longitudinal shape of the lower surface of the base cover.
  • the reinforcing member includes a first groove and a second groove.
  • the first groove and the second groove are formed on the outer surface of the reinforcing member along the longitudinal direction of the reinforcing member.
  • the first groove and the second groove are formed in a groove shape that is sunken inwardly toward each other.
  • an end portion of the lower surface of the first base cover is inserted and placed into the first groove, and an end portion of the lower surface of the second base cover is inserted and placed into the second groove.
  • the reinforcing member is attached to an end portion of the lower surface of the first base cover and an end portion of the lower surface of the second base cover by an adhesive.
  • the reinforcing member is formed of or includes a melamine resin.
  • a circuit breaker according to an embodiment of the present invention has the effect of improving the withstand voltage performance of the base cover and the insulation performance of the case by providing a reinforcing member and/or by attaching the reinforcing member to the base cover with an adhesive.
  • circuit breaker according to the embodiments of the present invention has the effect of improving the withstand voltage performance, arc-extinguishing performance, and heat-resistant performance by having a reinforcing member formed of or including a melamine resin.
  • Figure 1 illustrates a wiring circuit breaker according to examples of an embodiment of the present invention.
  • Figure 2 is an exploded perspective view of the wiring circuit breaker of Figure 1.
  • Figure 3 is a cross-sectional view of a base assembly with a handle mounted thereon.
  • Figure 4 illustrates the base assembly, reinforcing member, and case illustrated in Figure 2.
  • Figure 5 is a perspective view of the base assembly illustrated in Figure 4.
  • FIG. 6 is a bottom perspective view of the first reinforcing member and base assembly of the present invention.
  • FIGS. 7 and 8 are bottom perspective views of the second reinforcing member and base assembly of the present invention.
  • FIG. 9 is a bottom perspective view of the third reinforcing member and base assembly of the present invention.
  • Figure 10 is a cross-sectional view schematically showing the third reinforcing member and base cover illustrated in Figure 9.
  • Figure 11 is a cross-sectional view schematically showing the fourth reinforcing member and base cover of the present invention.
  • a molded case circuit breaker is an electrical device that automatically cuts off the circuit in the event of an electrical overload or short circuit to protect the circuit and load.
  • FIG. 1 illustrates a wiring circuit breaker according to examples of an embodiment of the present invention
  • FIG. 2 is an exploded perspective view of the wiring circuit breaker of FIG. 1.
  • a circuit breaker (10) according to an example of an embodiment of the present invention includes a case (12), a case cover (11), a plurality of base assemblies (13), a reinforcing member, and a trip assembly (136).
  • the case (12) and the case cover (11) form the exterior of a wiring circuit breaker (10) according to an example of an embodiment of the present invention.
  • the case (12) and the case cover (11) can be combined to form a polyhedron (e.g., a hexahedron) having an accommodation space inside.
  • a polyhedron e.g., a hexahedron
  • the case (12) and the case cover (11) are combined, and an accommodation space is formed inside the case (12) and the case cover (11) through the combination.
  • the combination can be made by a fastening member such as a bolt, a nut, a screw, etc.
  • the case (12) and the case cover (11) further include other components (e.g., holes into which bolts or screws are inserted, grooves into which nuts are inserted, etc.) that allow them to be fastened to each other by fastening members.
  • other components e.g., holes into which bolts or screws are inserted, grooves into which nuts are inserted, etc.
  • a plurality of base assemblies (13) are accommodated in a receiving space formed by combining the case (12) and the case cover (11).
  • the case (12) can be formed in a box shape with one side (the upper side in the drawing) open and an accommodation space inside.
  • the case (12) has a bottom part (121).
  • the bottom part (121) represents, for example, the bottom plate of a box.
  • the bottom part (121) is formed in a plate shape (see Fig. 4).
  • the bottom portion (121) has a width preset in one direction (e.g., the x direction in FIG. 4), a length preset in another direction (e.g., the y direction in FIG. 4), and a thickness preset in another direction (e.g., the z direction in FIG. 4).
  • the other direction represents a direction horizontally orthogonal to the one direction
  • the other direction represents a direction vertically orthogonal to the one direction.
  • the bottom part (121) can be formed with curves, steps, holes, grooves, etc. according to the user's needs.
  • case (12) has one side (122) and the other side (123), one side wall (124) and the other side wall (125).
  • the above one side (122) and the other side (123), one side wall (124) and the other side wall (125) represent, for example, side plates of a box.
  • One side (122) and the other side (123), one side wall (124) and the other side wall (125) are formed along the edge of the bottom (121) in a direction perpendicular to the bottom (121).
  • One side (122) and the other side (123) are spaced apart by a preset distance and placed facing each other.
  • One side (122) and the other side (123) each have one end and the other end. The one end and the other end are opposite ends.
  • a plurality of one-sided openings (122h) penetrating the one-sided portion (122) are formed between one end (1221) and the other end (1222) of the one-sided portion (122) (see FIG. 4).
  • a plurality of other side openings (123h) penetrating the other side (123) are formed between one end (1231) and the other end (1232) of the other side (123) (see FIG. 4).
  • a terminal connected to the power supply side or the load side is arranged in the above one-side opening (122h) or the other-side opening (123h).
  • the interior of the case (12) is electrically connected to the exterior by the above-mentioned one-sided opening (122h) or the other-sided opening (123h).
  • the above-mentioned connection is made by the electrically conductive portion (138) penetrating the interior and exterior of the case (12) and being coupled to the case (12).
  • One side wall (124) and the other side wall (125) are spaced apart by a preset distance and placed facing each other.
  • One side wall portion (124) and the other side wall portion (125) each have one end and the other end. The one end and the other end are opposite ends.
  • Each of the one side wall portion (124) and the other side wall portion (125) is formed in a plate shape (see Fig. 4).
  • each of the one side wall portion (124) and the other side wall portion (125) is formed in a plate shape having a preset length (length in the y direction in the drawing), a preset thickness (length in the x direction in the drawing), and a preset width (length in the z direction in the drawing).
  • One side (122) and the other side (123), and one side wall (124) and the other side wall (125) are connected to each other.
  • one end (1221) of one side (122) is connected to one end (1241) of one side wall (124), and the other end (1222) of one side (122) is connected to one end (1251) of the other side wall (125).
  • one end (1231) of the other side (123) is connected to the other end (1242) of the one side wall (124), and the other end (1232) of the other side (123) is connected to the other end (1252) of the other side wall (125).
  • the accommodation space of the case (12) represents a space surrounded by the bottom portion (121), one side portion (122), the other side portion (123), one side wall portion (124), and the other side wall portion (125).
  • the above bottom portion (121), one side portion (122) and the other side portion (123), one side wall portion (124) and the other side wall portion (125) can be formed integrally.
  • the case (12) is formed of an insulating material such as plastic or synthetic resin. Accordingly, a safety accident that may occur due to the random passage of current through the case (12) can be prevented.
  • the case cover (11) serves to cover the case (12).
  • components e.g., base assembly (13), etc.
  • the case cover (11) can be formed in a box shape with one side (the lower side in the drawing) open and an accommodation space inside.
  • the top plate of the case cover (11) can be formed with curves, steps, holes, grooves, etc. according to the user's needs.
  • a through hole penetrating the top plate of the case cover (11) is formed.
  • a handle (1351) is placed in the through hole.
  • the case cover (11) has side plates formed along the edge of the top plate in a direction perpendicular to the top plate.
  • the side plates formed on the case cover (11) can be connected to one side (122), the other side (123), one side wall (124) and/or the other side wall (125) formed on the case (12).
  • the connection can be made by a fastening member as described above.
  • components are mounted to block current flow when an abnormal current (accident current) occurs and to extinguish the generated arc.
  • a plurality of base assemblies (13) are accommodated in the accommodation space of the case (12). That is, a plurality of base assemblies (13) are arranged in the accommodation space of the case (12). Three base assemblies (13a, 13b, 13c) are illustrated in FIGS. 2 and 4.
  • the plurality of base assemblies (13) illustrated in FIGS. 2 and 4 include a first base assembly (13a), a second base assembly (13b), and a third base assembly (13c).
  • the first base assembly (13a) is disposed on one side of the case (12) wall portion (124)
  • the second base assembly (13b) is disposed on one side of the first base assembly (13a)
  • the third base assembly (13c) is disposed on the other side of the case (12) wall portion (125).
  • the second base assembly (13b) is disposed between the first base assembly (13a) and the third base assembly (13c).
  • each of the plurality of base assemblies (13) (for example, three as shown in FIGS. 2 and 4) is identical or similar, but one of the plurality of base assemblies (13) (for example, the middle base assembly (13b) among the base assemblies (13) shown in FIGS. 2 and 4) is equipped with a handle (1351).
  • FIG. 3 is a cross-sectional view of a base assembly equipped with a handle
  • FIG. 4 shows the base assembly, reinforcing member and case shown in FIG. 2
  • FIG. 5 is a perspective view of the base assembly shown in FIG. 4.
  • a plurality of base assemblies (13) can be formed with the same or similar structures, except for the handle (1351) and various components that allow the handle (1351) to be mounted.
  • base assemblies 13a, 13b, 13c
  • FIGS. 2 and 4 Although three base assemblies (13a, 13b, 13c) are shown in FIGS. 2 and 4, this is not necessarily limited. Four or more base assemblies (13) may be arranged according to the user's needs.
  • a plurality of base assemblies (13) are connected to each other.
  • Each of the plurality of base assemblies (13) includes several components that allow the plurality of base assemblies (13) to be connected to each other.
  • a plurality of base assemblies (13) are connected to each other and are energized or de-energized simultaneously.
  • One of the plurality of base assemblies (13) is equipped with a handle (1351) and various components for mounting the handle (1351).
  • multiple base assemblies (13) can be energized or de-energized simultaneously.
  • the base assembly (13) includes a base cover (131) and a fixed contact (132), a movable contact (133), an opening/closing mechanism (135), an arc extinguishing portion (134), and a trip portion (136) accommodated in the base cover (131).
  • the trip portion (136) represents the trip assembly (136) illustrated in FIG. 2.
  • the base cover (131) forms the exterior of the base assembly (13).
  • the base cover (131) has an accommodation space inside and can be formed in a polyhedral shape (e.g., a hexahedral shape).
  • a polyhedral shape e.g., a hexahedral shape.
  • Each face of the polyhedron can be formed with curves, steps, holes, grooves, etc. according to the user's needs.
  • the base cover (131) is provided with a first base cover (1311) and a second base cover (1312) that are physically separated for the convenience of assembling the components constituting the base assembly (13).
  • the first base cover (1311) and the second base cover (1312) are manufactured separately and can be joined together.
  • the joining can be accomplished by fastening members such as bolts, nuts, screws, etc.
  • the first base cover (1311) and the second base cover (1312) further include other components (e.g., holes into which bolts or screws are inserted, grooves into which nuts are inserted, etc.) that enable them to be fastened to each other by fastening members.
  • other components e.g., holes into which bolts or screws are inserted, grooves into which nuts are inserted, etc.
  • the first base cover (1311) and the second base cover (1312) form the exterior of the base assembly (13).
  • the first base cover (1311) may be placed on the left side, for example, and the second base cover (1312) may be placed on the right side, for example.
  • the first base cover (1311) and the second base cover (1312) may be formed to be symmetrical to each other. That is, the first base cover (1311) and the second base cover (1312) may be formed such that one side facing each other has the same structure. Similarly, the first base cover (1311) and the second base cover (1312) may be formed such that the other side facing each other has the same structure.
  • a space is formed inside each of the first base cover (1311) and the second base cover (1312).
  • the space is connected to each other as the first base cover (1311) and the second base cover (1312) are combined.
  • a fixed contact (132), a movable contact (133), an opening/closing mechanism (135), an arc extinguishing part (134), and a trip part (136) are accommodated in the space.
  • Fig. 6 is a bottom perspective view of the first reinforcing member and the base assembly of the present invention.
  • the base assembly illustrated in Fig. 6 has its lower surface (which may also be referred to as the 'bottom surface') facing upward.
  • the base cover (131) includes a reinforcing member receiving portion (131a).
  • a reinforcing member receiving portion (131a) is formed in the base cover (131).
  • the reinforcing member receiving portion (131a) is formed on the lower surface of the base assembly (13) (specifically, the base cover (131)).
  • the reinforcing member receiving portion (131a) receives a reinforcing member (14) (which may be referred to as a ‘first reinforcing member (14)’).
  • the first reinforcing member (14) will be described later, and first, the reinforcing member receiving portion (131a) illustrated in Fig. 6, in which the first reinforcing member (14) is received, will be described.
  • the reinforcing member receiving portion (131a) is formed in a recess shape.
  • the reinforcing member receiving portion (131a) is formed in a groove shape that is sunken from the lower surface of the base cover (131) to the upper surface (in the z direction in FIG. 6).
  • the reinforcing member receiving portion (131a) is sunken from the lower surface of the base cover (131) to the upper surface to a preset depth.
  • a reinforcing member receiving portion (131a) is formed in the first base cover (1311) and the second base cover (1312). When the first base cover (1311) and the second base cover (1312) are combined (or assembled), one reinforcing member receiving portion (131a) is formed.
  • the reinforcing member receiving portion (131a) formed in the first base cover (1311) (which may be referred to as the ‘first reinforcing member receiving portion (1311a)’) is formed on the lower surface of the first base cover (1311) and is formed at an end of the first base cover (1311) facing the second base cover (1312) in the opposite direction (for example, the x direction in FIG. 6).
  • the reinforcing member receiving portion (131a) formed in the second base cover (1312) (which may be named as the 'second reinforcing member receiving portion (1312a)') is formed on the lower surface of the second base cover (1312) and is formed at an end of the second base cover (1312) facing the first base cover (1311) in one direction (for example, the x direction in FIG. 6).
  • first reinforcing member receiving portion (1311a) is formed by being sunken from the lower surface of the first base cover (1311) to the upper surface (in the z direction in FIG. 6) to a preset length (depth)
  • second reinforcing member receiving portion (1312a) is formed by being sunken from the lower surface of the second base cover (1312) to the upper surface to a preset length (depth).
  • the sunken depths (preset depths) of the first reinforcing member receiving portion (1311a) and the second reinforcing member receiving portion (1312a) are the same.
  • the reinforcing member receiving portion (131a) includes a first reinforcing member receiving portion (1311a) and a second reinforcing member receiving portion (1312a), and the reinforcing member receiving portion (131a) is formed by combining the first reinforcing member receiving portion (1311a) and the second reinforcing member receiving portion (1312a).
  • first base cover (1311) and the second base cover (1312) are combined (or assembled), the first reinforcing member receiving portion (1311a) and the second reinforcing member receiving portion (1312a) are combined to form one reinforcing member receiving portion (131a).
  • the reinforcing member receiving portion (131a) has a width preset in one direction (e.g., the x direction in FIG. 6), a length preset in another direction (e.g., the y direction in FIG. 6), and a depth preset in another direction (e.g., the z direction in FIG. 6).
  • the other direction represents a direction horizontally orthogonal to the one direction
  • the other direction represents a direction vertically orthogonal to the one direction.
  • the preset width, length, and depth of the first reinforcing member receiving portion (1311a) are each identical to the preset width, length, and depth of the second reinforcing member receiving portion (1312a). Accordingly, the first reinforcing member (14) is evenly seated in the reinforcing member receiving portion (131a). In addition, the force exerted on the first reinforcing member (14) by the arc discharged through the gap between the first base cover (1311) and the second base cover (1312) is evenly distributed to the first reinforcing member (14).
  • the preset width of the reinforcing member receiving portion (131a) is equal to the sum of the preset width of the first reinforcing member receiving portion (1311a) and the preset width of the second reinforcing member receiving portion (1312a).
  • the preset length of the reinforcing member receiving portion (131a) is equal to the preset length of the first reinforcing member receiving portion (1311a) or the second reinforcing member receiving portion (1312a).
  • the preset depth of the reinforcing member receiving portion (131a) is equal to the preset depth of the first reinforcing member receiving portion (1311a) or the second reinforcing member receiving portion (1312a).
  • the preset width of the reinforcing member receiving portion (131a) is formed smaller than the preset length.
  • the reinforcing member receiving portion (131a) is formed in a recess shape in which the length in one direction (e.g., the y direction in FIG. 6) is much longer than the width in another direction (e.g., the x direction in FIG. 6).
  • a plurality of reinforcing member receiving portions (131a) may be formed on the lower surface of the base cover (131).
  • two reinforcing member receiving portions can be formed on the lower surface of the base cover (131).
  • the two reinforcing member receiving portions (131a, 131b) are spaced apart from each other by the length of the groove in one direction (for example, the y direction in Fig. 6).
  • the reference numeral 131a denotes one of the two reinforcing member receiving portions (131a).
  • the reference numeral 1311a denotes a first reinforcing member receiving portion (1311a) provided in the one reinforcing member receiving portion (131a)
  • the reference numeral 1312a denotes a second reinforcing member receiving portion (1312a) provided in the one reinforcing member receiving portion (131a).
  • the reference numeral 131b denotes the other of the two reinforcing member receiving portions (131a).
  • the reference numeral 1311b denotes a first reinforcing member receiving portion (1311b) provided in the other reinforcing member receiving portion (131b), and the reference numeral 1312b denotes a second reinforcing member receiving portion (1312b) provided in the other reinforcing member receiving portion (131b).
  • a single reinforcing member receiving portion (131a or 131b) that is connected without a break can be formed on the lower surface of the base cover (131).
  • a first reinforcing member (14) is arranged in the reinforcing member receiving portion (131a).
  • a first reinforcing member (141, 142) is arranged in each of the plurality of reinforcing member receiving portions (131a, 131b).
  • Reinforcing member receiving portions (131a, 131b) are formed in each of a plurality of base assemblies (13) (specifically, base covers (131)).
  • the wiring circuit breaker (10) of the present invention includes a first reinforcing member (14).
  • the first reinforcing member (14) is placed (or received) in a reinforcing member receiving portion (131a) formed on the lower surface of the base assembly (13) (specifically, the base cover (131)).
  • the first reinforcing member (14) is positioned between the base assembly (13) and the case (12). Specifically, the first reinforcing member (14) is positioned between the lower surface of the base cover (131) and the inner surface of the bottom portion (121) of the case (12).
  • the lower surface of the base cover (131) and the inner surface of the bottom portion (121) of the case (12) come into contact. Accordingly, the inner surface of the bottom portion (121) of the case (12) supports the first reinforcing member (14), prevents the first reinforcing member (14) from being detached from the reinforcing member receiving portion (131a), and ensures that the first reinforcing member (14) is firmly adhered to the reinforcing member receiving portion (131a).
  • the withstand voltage In general, the maximum voltage is called the breakdown voltage, and the withstand voltage indicates a voltage range lower than this breakdown voltage.
  • Circuit breakers must be equipped with a component that maintains the internal withstand voltage performance of the circuit breaker even after the current is cut off.
  • the first reinforcing member (14) serves to maintain the withstand voltage performance of the wiring circuit breaker (10).
  • the first reinforcing member (14) is formed in a shape corresponding to the shape of the reinforcing member receiving portion (131a).
  • the reinforcing member receiving portion (131a) is formed in a groove shape having a preset length in one direction corresponding to the shape of the first reinforcing member (14).
  • the first reinforcing member (14) has a width preset in one direction (e.g., the x direction in FIG. 6), a length preset in another direction (e.g., the y direction in FIG. 6), and a thickness preset in another direction (e.g., the z direction in FIG. 6).
  • the other direction represents a direction horizontally orthogonal to the one direction
  • the other direction represents a direction vertically orthogonal to the one direction.
  • the preset width of the first reinforcing member (14) is formed to be equal to or smaller than the preset width of the reinforcing member receiving portion (131a).
  • the preset length of the first reinforcing member (14) is formed to be equal to or smaller than the preset length of the reinforcing member receiving portion (131a).
  • the preset thickness of the first reinforcing member (14) is formed to be the same as the preset depth of the reinforcing member receiving portion (131a).
  • an adhesive may be applied to the reinforcing member receiving portion (131a) (the lower surface of the base cover (131)).
  • the adhesive may be a silicone adhesive having high heat resistance and excellent electrical insulation properties.
  • the adhesive is not limited to the silicone adhesive, and may be an adhesive of various other materials, such as epoxy.
  • the thickness of the first reinforcing member (14) is formed to be the same as the depth of the reinforcing member receiving portion (131a). This is to ensure that the inner surface of the bottom portion (121) of the case (12) firmly supports the first reinforcing member (14) and that the first reinforcing member (14) is firmly adhered to the reinforcing member receiving portion (131a).
  • the first reinforcing member (14) is formed in a bar shape.
  • the preset width of the first reinforcing member (14) is formed smaller than the preset length.
  • the first reinforcing member (14) is formed in a rod shape in which the length in one direction (e.g., the y direction in FIG. 6) is much longer than the width in another direction (e.g., the x direction in FIG. 6).
  • the first reinforcing member (14) is formed of melamine resin or is formed to include melamine resin. As a result, the first reinforcing member (14) has improved characteristics of withstand voltage performance, arc extinguishing performance, and heat resistance performance.
  • first reinforcing member (14) may be formed of synthetic resin to reduce production costs.
  • the first reinforcing member (14) is attached to the reinforcing member receiving portion (131a) by an adhesive.
  • the first reinforcing member (14) is attached to the reinforcing member receiving portion (131a).
  • the base assembly (13) to which the first reinforcing member (14) is attached is inserted (or assembled) into the case (12).
  • Figures 7 and 8 are bottom perspective views of the second reinforcing member and the base assembly of the present invention.
  • the base assembly illustrated in Figures 7 and 8 has its lower surface facing upward.
  • the base cover (131) includes a reinforcing member receiving portion (P1 in FIG. 7, 131c in FIG. 8). In other words, a reinforcing member receiving portion (P1, 131c) is formed in the base cover (131).
  • the reinforcing member receiving portion (P1, 131c) is formed on the lower surface of the base assembly (13) (specifically, the base cover (131)).
  • the reinforcing member receiving portion (P1, 131c) illustrated in FIGS. 7 and 8 receives a reinforcing member (15) (which may be referred to as a ‘second reinforcing member (15)’).
  • the second reinforcing member (15) will be described later, and first, the reinforcing member receiving portion (P1, 131c) illustrated in FIG. 7 and FIG. 8, in which the second reinforcing member (15) is received, will be described.
  • the reinforcing member receiving portion (P1, 131c) has a square or rectangular planar shape.
  • the planar shape refers to the shape of the reinforcing member receiving portion (P1, 131c) when looking down from above (in the z direction in Figs. 7 and 8) at the reinforcing member receiving portion (P1, 131c).
  • a different characteristic of the reinforcing member receiving portion (P) illustrated in FIG. 7 and the reinforcing member receiving portion (131c) illustrated in FIG. 8 is that the reinforcing member receiving portion (P) illustrated in FIG. 7 has no preset depth, while the reinforcing member receiving portion (131c) illustrated in FIG. 8 is formed in a recessed shape with a preset depth.
  • the reinforcing member receiving portion (P) illustrated in Fig. 7 includes the characteristics 1) to 5) below.
  • the reinforcing member receiving portion (P) represents a portion of the lower surface of the base cover (131). That is, a flat lower surface without any curves, grooves, or steps among the lower surfaces of the base cover (131) becomes the reinforcing member receiving portion (P), and a second reinforcing member (15) is placed in the reinforcing member receiving portion (flat lower surface) (P).
  • the lower surface of the base cover (131) on which the second reinforcing member (15) is placed refers to the lower surface of the base cover (131) that comes into contact with the inner surface of the bottom portion (121) of the case (12) when the second reinforcing member (15) is not present.
  • the size of the reinforcing member receiving portion (P) and the size of the planar shape of the second reinforcing member (15) are the same.
  • the planar shape refers to the shape of the second reinforcing member (15) when looking down at the second reinforcing member (15) from above (in the z direction in FIGS. 7 and 8).
  • the size of the reinforcing member receiving portion (P) may be the same as the size at which the lower surface of the base cover (131) corresponding to the reinforcing member receiving portion (P) comes into contact with the inner surface of the bottom portion (121) of the case (12) in the case where the second reinforcing member (15) is absent. As a result, the withstand voltage performance of the base assembly (13) is greatly improved.
  • the reinforcing member receiving portion (P) can be formed in a square or rectangular shape, and may partially include an arc shape or curve, etc.
  • the reinforcing member receiving portion (131c) illustrated in Fig. 8 is formed to be sunken from the lower surface of the base cover (131) to the upper surface (in the z direction in Fig. 8). Specifically, the reinforcing member receiving portion (131c) is formed in a groove shape sunken from the lower surface of the base cover (131) to the upper surface to a preset depth.
  • a reinforcing member receiving portion (P1, 131c) is formed in the first base cover (1311) and the second base cover (1312). When the first base cover (1311) and the second base cover (1312) are combined (or assembled), one reinforcing member receiving portion (P1, 131c) is formed.
  • a reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) (which may be referred to as a “first reinforcing member receiving portion”) formed in the first base cover (1311) is formed on the lower surface of the first base cover (1311) and includes an end of the first base cover (1311) facing the second base cover (1312) in the opposite direction (for example, the x direction in FIGS. 7 and 8).
  • the reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8) (which may be named a ‘second reinforcing member receiving portion’) formed in the second base cover (1312) is formed on the lower surface of the second base cover (1312) and includes an end portion of the second base cover (1312) facing the first base cover (1311) in one direction (for example, the x direction in FIGS. 7 and 8).
  • the first reinforcing member receiving portion (1311c) illustrated in FIG. 8 is formed by being sunken from the lower surface of the first base cover (1311) to the upper surface (in the z direction in FIG. 8) to a preset length (depth), and the second reinforcing member receiving portion (1312c) is formed by being sunken from the lower surface of the second base cover (1312) to the upper surface to a preset length (depth).
  • the sunken depths (preset depths) of the first reinforcing member receiving portion (1311c) and the second reinforcing member receiving portion (1312c) are the same.
  • the reinforcing member receiving portion (P1, 131c) illustrated in FIGS. 7 and 8 includes a first reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) and a second reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8), and the reinforcing member receiving portion (P1, 131c) is formed by combining the first reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) and the second reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8).
  • the first reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) and the second reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8) are combined to form one reinforcing member receiving portion (P1, 131c).
  • the reinforcing member receiving portion (P1, 131c) illustrated in FIGS. 7 and 8 has a width preset in one direction (e.g., the x direction in FIGS. 7 and 8) and a length preset in another direction (e.g., the y direction in FIGS. 7 and 8).
  • the other direction represents a direction horizontally orthogonal to the one direction.
  • the reinforcing member receiving portion (131c) illustrated in Fig. 8 has a depth preset in another direction (e.g., the z direction in Fig. 8).
  • the another direction represents a direction perpendicular to the one direction.
  • the preset width and length of the first reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) illustrated in FIGS. 7 and 8 are respectively identical to the preset width and length of the second reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8).
  • the preset depth of the first reinforcing member receiving portion (1311c) illustrated in FIG. 8 is respectively identical to the preset depth of the second reinforcing member receiving portion (1312c). Accordingly, the second reinforcing member (15) is evenly seated in the reinforcing member receiving portion (P1, 131c).
  • the force exerted on the second reinforcing member (15) by the arc discharged through the gap between the first base cover (1311) and the second base cover (1312) is uniformly distributed to the second reinforcing member (15).
  • the preset width of the reinforcing member receiving portion (P1, 131c) illustrated in FIGS. 7 and 8 is equal to the sum of the preset width of the first reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) and the preset width of the second reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8).
  • the preset length of the reinforcing member receiving portion (P1, 131c) is equal to the preset length of the first reinforcing member receiving portion (not given a symbol in FIG. 7, 1311c in FIG. 8) or the second reinforcing member receiving portion (not given a symbol in FIG. 7, 1312c in FIG. 8).
  • the preset depth of the reinforcing member receiving portion (131c) illustrated in Fig. 8 is the same as the preset depth of the first reinforcing member receiving portion (1311c) or the second reinforcing member receiving portion (1312c).
  • the preset width of the reinforcing member receiving portion (P1) illustrated in Fig. 7 may be equal to the preset length, which indicates that the shape of the reinforcing member receiving portion (P1) is square.
  • the preset width of the reinforcing member receiving portion (P1) may be smaller than the preset length, which indicates that the shape of the reinforcing member receiving portion (P1) is rectangular.
  • the preset width of the reinforcing member receiving portion (131c) illustrated in Fig. 8 may be the same as the preset length, which indicates that the shape of the reinforcing member receiving portion (131c) is formed as a groove shape having a preset depth and a square plane shape.
  • the preset width of the reinforcing member receiving portion (131c) may be smaller than the preset length, which indicates that the shape of the reinforcing member receiving portion (131c) is formed as a groove shape having a preset depth and a rectangular plane shape.
  • a plurality of reinforcing member receiving portions (P1 and P2 in FIG. 7, 131c and 131d in FIG. 8) as shown in FIG. 7 or FIG. 8 may be formed on the lower surface of the base cover (131).
  • two reinforcing member receiving portions (P1 and P2 in FIG. 7, 131c and 131d in FIG. 8) can be formed on the lower surface of the base cover (131).
  • the two reinforcing member receiving portions (P1 and P2 in FIG. 7, 131c and 131d in FIG. 8) are spaced apart from each other by the length of the groove in another direction (e.g., the y direction in FIGS. 7 and 8).
  • drawing symbol P1 represents one of the two reinforcing member receiving portions
  • drawing symbol P2 represents the other of the two reinforcing member receiving portions.
  • reference numeral 131c denotes one of the two reinforcing member receiving portions.
  • Reference numeral 1311c denotes a first reinforcing member receiving portion provided in the one reinforcing member receiving portion (131c)
  • reference numeral 1312c denotes a second reinforcing member receiving portion provided in the one reinforcing member receiving portion (131c).
  • reference numeral 131d denotes the other of the two reinforcing member receiving portions.
  • Reference numeral 1311d denotes a first reinforcing member receiving portion provided in the other reinforcing member receiving portion (131d)
  • reference numeral 1312d denotes a second reinforcing member receiving portion provided in the other reinforcing member receiving portion (131d).
  • a single reinforcing member receiving portion P1 or P2 in FIG. 7, 131c or 131d in FIG. 8 that is connected without a break can be formed on the lower surface of the base cover (131).
  • a second reinforcing member (15) is arranged in the reinforcing member receiving portion (P1, 131c).
  • a second reinforcing member (151, 152) is arranged in each of the plurality of reinforcing member receiving portions (P1, P2 in FIG. 7, 131c, 131d in FIG. 8).
  • a reinforcing member receiving portion (P1, 131c) is formed in each of a plurality of base assemblies (13) (specifically, base covers (131)).
  • the circuit breaker (10) for wiring of the present invention includes a second reinforcing member (15).
  • the second reinforcing member (15) is placed in the reinforcing member receiving portion (P1, 131c) illustrated in FIGS. 7 and 8.
  • the second reinforcing member (15) is placed (or received) in a reinforcing member receiving portion (P1, 131c) formed on the lower surface of the base assembly (13) (specifically, the base cover (131)).
  • the second reinforcing member (15) is positioned between the base assembly (13) and the case (12). Specifically, the second reinforcing member (15) is positioned between the lower surface of the base cover (131) and the inner surface of the bottom portion (121) of the case (12).
  • the upper surface of the second reinforcing member (15) contacts the lower surface of the base cover (131), and the lower surface of the second reinforcing member (15) contacts the inner surface of the bottom portion (121) of the case (12). Accordingly, the inner surface of the bottom portion (121) of the case (12) supports the second reinforcing member (15), and the second reinforcing member (15) is firmly bonded to the reinforcing member receiving portion (P1).
  • the lower surface of the base cover (131) and the inner surface of the bottom portion (121) of the case (12) come into contact. Accordingly, the inner surface of the bottom portion (121) of the case (12) supports the second reinforcing member (15), prevents the second reinforcing member (15) from being detached from the reinforcing member receiving portion (131c), and ensures that the second reinforcing member (15) is firmly adhered to the reinforcing member receiving portion (131c).
  • the second reinforcing member (15) plays a role in maintaining the withstand voltage performance of the wiring circuit breaker (10) in the same way as the first reinforcing member (14).
  • the second reinforcing member (15) is formed in a shape corresponding to the shape of the reinforcing member receiving portion (P1) illustrated in Fig. 7.
  • the second reinforcing member (15) is formed in a square or rectangular plate shape with a preset thickness.
  • the second reinforcing member (15) is formed in a shape corresponding to the shape of the reinforcing member receiving portion (131c) illustrated in Fig. 8.
  • the reinforcing member receiving portion (131c) is formed in a groove shape having a preset depth and a square or rectangular planar shape
  • the second reinforcing member (15) is formed in a plate shape having a preset thickness and a square or rectangular planar shape that is received in the reinforcing member receiving portion (131c).
  • the second reinforcing member (15) has a width preset in one direction (e.g., the x direction in FIGS. 7 and 8), a length preset in another direction (e.g., the y direction in FIGS. 7 and 8), and a thickness preset in another direction (e.g., the z direction in FIGS. 7 and 8).
  • the other direction represents a direction horizontally orthogonal to the one direction
  • the other direction represents a direction vertically orthogonal to the one direction.
  • the preset width and length of the second reinforcing member (15) are formed to be the same as the preset width and length of the reinforcing member receiving portion (P1) illustrated in Fig. 7.
  • the preset width of the second reinforcing member (15) is formed to be equal to or smaller than the preset width of the reinforcing member receiving portion (131c).
  • the preset length of the second reinforcing member (15) is formed to be equal to or smaller than the preset length of the reinforcing member receiving portion (131c).
  • the adhesive may be a silicone adhesive having high heat resistance and excellent electrical insulation properties.
  • the adhesive is not limited to the silicone adhesive, and may be an adhesive of various other materials, such as epoxy.
  • the thickness of the second reinforcing member (15) is formed to be the same as the depth of the reinforcing member receiving portion (131c). This is to ensure that the inner surface of the bottom portion (121) of the case (12) firmly supports the second reinforcing member (15) and that the second reinforcing member (15) is firmly adhered to the reinforcing member receiving portion (131c).
  • the second reinforcing member (15) is formed of melamine resin or is formed to include melamine resin. As a result, the second reinforcing member (15) has improved characteristics of withstand voltage performance, arc-extinguishing performance, and heat-resistant performance.
  • the second reinforcing member (15) may be formed of synthetic resin to reduce production costs.
  • the second reinforcing member (15) is attached to the reinforcing member receiving portion (P1, 131c) illustrated in FIG. 7 or FIG. 8 by an adhesive.
  • the second reinforcing member (15) is attached to the reinforcing member receiving portion (P1, 131c).
  • the base assembly (13) to which the second reinforcing member (15) is attached is inserted (or assembled) into the case (12).
  • FIG. 9 is a bottom perspective view of the third reinforcing member and base assembly of the present invention
  • FIG. 10 is a cross-sectional view schematically showing the third reinforcing member and base cover shown in FIG. 9.
  • the base assembly shown in FIG. 9 has its lower surface facing upward.
  • the third reinforcing member shown in FIG. 10 shows a cross-section cut when the third reinforcing member shown in FIG. 9 is cut in the A-A direction.
  • the base cover (131) includes a reinforcing member receiving portion (131e).
  • a reinforcing member receiving portion (131e) is formed in the base cover (131).
  • the reinforcing member receiving portion (131e) is formed on the inside of the lower surface of the base assembly (13) (specifically, the base cover (131)).
  • the reinforcing member receiving portion (131e) receives a reinforcing member (16) (which may be referred to as a ‘third reinforcing member’).
  • the third reinforcing member (16) will be described later, and first, the reinforcing member receiving portion (131e) illustrated in Fig. 10, in which the third reinforcing member (16) is received, will be described.
  • a reinforcing member receiving portion (131e) is formed in the first base cover (1311) and the second base cover (1312). When the first base cover (1311) and the second base cover (1312) are combined (or assembled), one reinforcing member receiving portion (131e) is formed.
  • a reinforcing member receiving portion (1311e) formed on the first base cover (1311) (which may be referred to as a “first reinforcing member receiving portion”) is formed on an end portion of the lower surface of the first base cover (1311).
  • the first reinforcing member receiving portion (1311e) is formed on a side surface of the end portion of the lower surface of the first base cover (1311).
  • the first reinforcing member receiving portion (1311e) is formed on a side surface facing a side surface of the end portion of the lower surface of the second base cover (1312) in an opposite direction (for example, the x direction in FIG. 9) among the end portions of the lower surface of the first base cover (1311).
  • the reinforcing member receiving portion (1312e) formed in the second base cover (1312) (which may be named a 'second reinforcing member receiving portion') is formed at an end portion of the lower surface of the second base cover (1312).
  • the second reinforcing member receiving portion (1312e) is formed on a side surface of the end portion of the lower surface of the second base cover (1312).
  • the second reinforcing member receiving portion (1312e) is formed on a side surface that faces the side surface of the end portion of the lower surface of the first base cover (1311) in one direction (for example, the x direction in FIG. 9) among the end portions of the lower surface of the second base cover (1312).
  • first reinforcing member receiving portion (1311e) and the second reinforcing member receiving portion (1312e) face each other and are formed in corresponding shapes.
  • the first reinforcing member receiving portion (1311e) is placed inside the lower surface of the first base cover (1311), and the second reinforcing member receiving portion (1312e) is placed inside the lower surface of the second base cover (1312).
  • the first reinforcing member receiving portion (1311e) and the second reinforcing member receiving portion (1312e) are formed in a groove shape sunken to a preset depth.
  • the first reinforcing member receiving portion (1311e) is formed by being sunk to a preset depth in one direction (x direction in FIG. 9) from the side surface of the end surface of the lower surface of the first base cover (1311)
  • the second reinforcing member receiving portion (1312e) is formed by being sunk to a preset depth in the opposite direction to the one direction from the side surface of the end surface of the lower surface of the second base cover (1312).
  • the preset depth represents the radius of the semicircle when the cross-sectional shapes of the first reinforcing member receiving portion (1311e) and the second reinforcing member receiving portion (1312e) are each semicircular.
  • the reinforcing member receiving portion (131e) illustrated in FIG. 10 includes a first reinforcing member receiving portion (1311e) and a second reinforcing member receiving portion (1312e), and the reinforcing member receiving portion (131e) is formed by combining the first reinforcing member receiving portion (1311e) and the second reinforcing member receiving portion (1312e).
  • the reinforcing member receiving portion (131e) can be formed over the entire lower surface of the base cover (131) along the longitudinal direction of the base cover (131) (y direction in FIG. 9) and over a portion of one side surface of the base cover (131) along the height direction of the base cover (131) (z direction in FIG. 9).
  • the first reinforcing member receiving portion (1311e) can be formed to extend to the entire end of the lower surface of the first base cover (1311) in the y direction in FIG. 9 and to a portion of the end of one side of the first base cover (1311) in the z direction in FIG. 9.
  • the second reinforcing member receiving portion (1312e) can be formed to extend to the entire end of the lower surface of the second base cover (1312) in the y direction in FIG. 9 and to a part of the end of one side of the second base cover (1312) in the z direction in FIG. 9.
  • the reinforcing member receiving portion (131e) may be formed only on the entire lower surface of the base cover (131) along the longitudinal direction of the base cover (131) (y direction in FIG. 9).
  • the second reinforcing member receiving portion (1312e) can be formed to be long only over the entire end portion of the lower surface of the second base cover (1312) in the y direction in FIG. 9.
  • a reinforcing member receiving portion (131e) is formed in each of a plurality of base assemblies (13) (specifically, base covers (131)).
  • the circuit breaker (10) for wiring of the present invention includes a third reinforcing member (16).
  • the third reinforcing member (16) is placed in the reinforcing member receiving portion (131e) illustrated in Fig. 10.
  • the third reinforcing member (16) is arranged between the end of the lower surface of the first base cover (1311) and the end of the lower surface of the second base cover (1312), thereby filling a gap that may occur between the end of the lower surface of the first base cover (1311) and the end of the lower surface of the second base cover (1312), thereby preventing foreign substances from being discharged through the gap and maintaining the withstand voltage performance of the base assembly (13) constant.
  • the third reinforcing member (16) has the same role as the first reinforcing member (14).
  • the third reinforcing member (16) is formed in a rod shape having a preset length, and may include a bent shape. Specifically, the third reinforcing member (16) is formed in a rod shape having a long length in the y direction in FIG. 9, as shown in FIG. 9. In addition, the third reinforcing member (16) may include a partially bent (or bent) shape.
  • the third reinforcing member (16) is formed in a shape corresponding to the shape of the reinforcing member receiving portion (131e).
  • the cross-sectional shape of the reinforcing member receiving portion (131e) is a circle with a preset diameter
  • the cross-sectional shape of the third reinforcing member (16) is formed as a circle with a preset diameter
  • the diameter of the third reinforcing member (16) may be equal to or larger than the diameter of the reinforcing member receiving portion (131e). Accordingly, the third reinforcing member (16) fills a gap that may occur between the end portion of the lower surface of the first base cover (1311) and the end portion of the lower surface of the second base cover (1312).
  • FIG. 10 illustrates a space between the third reinforcing member (16) and the reinforcing member receiving portion (131e)
  • FIG. 10 is intended to show that the third reinforcing member (16) is received in the reinforcing member receiving portion (131e), and in reality, the space does not exist.
  • the shape of the third reinforcing member (16) in the longitudinal direction (y direction in FIG. 9) corresponds to the shape of the reinforcing member receiving portion (131e) in the longitudinal direction (y direction in FIG. 9) or the shape of the lower surface of the base cover (131) in the longitudinal direction (y direction in FIG. 9).
  • the shape of the third reinforcing member (16) in the longitudinal direction (y direction in FIG. 9) and the shape of the reinforcing member receiving portion (131e) in the longitudinal direction (y direction in FIG. 9) also have a shape that is bent (or folded) at a corresponding position.
  • the shapes of the third reinforcing member (16) and the reinforcing member receiving portion (131e) correspond to the shapes of the entire lower surface and one side surface of the base cover (131).
  • the third reinforcing member (16) is formed of melamine resin or is formed to include melamine resin. As a result, the third reinforcing member (16) has improved characteristics of withstand voltage performance, arc-extinguishing performance, and heat-resistant performance.
  • the third reinforcing member (16) may be formed of synthetic resin to reduce production costs.
  • the third reinforcing member (16) is attached to the reinforcing member receiving portion (131e) illustrated in Fig. 10 by an adhesive.
  • the adhesive may be a silicone adhesive having high heat resistance and excellent electrical insulation properties.
  • the adhesive is not limited to the silicone adhesive, and may be an adhesive of various other materials, such as epoxy.
  • the third reinforcing member (16) is attached to the reinforcing member receiving portion (131e).
  • the base assembly (13) to which the third reinforcing member (16) is attached is inserted (or assembled) into the case (12).
  • first base cover (1311) and the second base cover (1312) are combined (or assembled) before the first base cover (1311) and the second base cover (1312) are combined (or assembled).
  • an adhesive is applied to the inner surface of the first reinforcing member receiving portion (1311e) and/or the inner surface of the second reinforcing member receiving portion (1312e) and/or the outer surface of the third reinforcing member (16).
  • the third reinforcing member (16) is placed in the first reinforcing member receiving portion (1311e) or the second reinforcing member receiving portion (1312e).
  • the first base cover (1311) and the second base cover (1312) are combined (or assembled) by fastening members (bolts and nuts, screws, etc.).
  • Fig. 11 is a cross-sectional view schematically showing the fourth reinforcing member and base cover of the present invention.
  • the fourth reinforcing member (16') refer to Fig. 9.
  • the fourth reinforcing member (16’) illustrated in Fig. 11 can be viewed as a cut cross-section similar to the cut cross-section of the third reinforcing member (16) illustrated in Fig. 9 when cut in the A-A direction.
  • the circuit breaker (10) for wiring of the present invention includes a fourth reinforcing member (16’).
  • the fourth reinforcing member (16') is arranged between the first base cover (1311) and the second base cover (1312). Specifically, the fourth reinforcing member (16') is arranged between the end of the lower surface of the first base cover (1311) and the end of the lower surface of the second base cover. Accordingly, the fourth reinforcing member (16') fills a gap that may occur between the end of the lower surface of the first base cover (1311) and the end of the lower surface of the second base cover, thereby preventing foreign substances from being discharged through the gap and maintaining the withstand voltage performance of the base assembly (13) constant.
  • the fourth reinforcing member (16’) has the same role as the first reinforcing member.
  • the fourth reinforcing member (16') is formed in a rod shape having a preset length and may include a bent shape. Specifically, the fourth reinforcing member (16') is formed in a rod shape having a long length in the y direction in FIG. 9, as shown in FIG. 9. In addition, the fourth reinforcing member (16') may include a partially bent (or bent) shape.
  • the fourth reinforcing member (16’) includes a first groove (16’a) and a second groove (16’b).
  • the first groove (16’a) and the second groove (16’b) are formed on the outer surface of the fourth reinforcing member (16’) along the longitudinal direction of the fourth reinforcing member (16’) (e.g., the y direction in FIG. 9).
  • the first groove (16’a) and the second groove (16’b) are grooves that are sunken in opposite directions.
  • the first groove (16’a) and the second groove (16’b) have the same preset depth.
  • the first groove (16’a) is formed by recessing from the first outer surface of the fourth reinforcing member (16’) toward the center of the cross-section
  • the second groove (16’b) is formed by recessing from the second outer surface of the fourth reinforcing member (16’) toward the center of the cross-section.
  • the first outer surface and the second outer surface represent opposite outer surfaces of the fourth reinforcing member (16’).
  • the first groove (16’a) is formed by being sunk in the opposite direction of one direction (e.g., the x direction in FIG. 9), and the second groove (16’b) is formed by being sunk in one direction (e.g., the x direction in FIG. 9).
  • the first groove (16’a) and the second groove (16’b) are arranged on the central axis of one direction (e.g., the x direction in FIG. 9).
  • the cross-sectional shapes of the first groove (16'a) and the second groove (16'b) are formed as polygons.
  • the cross-sectional shapes of the first groove (16'a) and the second groove (16'b) are not limited to the polygons described above, and may be formed as semicircles or semiellipses.
  • An end portion of the lower surface of the first base cover (1311) is inserted and placed in the first groove (16’a), and an end portion of the lower surface of the second base cover (1312) is inserted and placed in the second groove (16’b).
  • the cross-sectional shape of the first groove (16’a) may correspond to the shape of the end of the lower surface of the first base cover (1311)
  • the cross-sectional shape of the second groove (16’b) may correspond to the shape of the end of the lower surface of the second base cover (1312). Accordingly, the fourth reinforcing member (16’) can suppress a gap that may occur between the end of the lower surface of the first base cover (1311) and the end of the lower surface of the second base cover (1312).
  • Fig. 11 shows a space between the end of the lower surface of the fourth reinforcing member (16') and the base cover (131), Fig. 11 is intended to show the fastening relationship between the fourth reinforcing member (16') and the base cover (131), and in reality, the space does not exist.
  • the shape of the fourth reinforcing member (16’) in the longitudinal direction corresponds to the shape of the lower surface of the base cover (131) in the longitudinal direction (y direction in FIG. 9).
  • the shape of the fourth reinforcing member (16') corresponds to the shape of the entire lower surface and one side surface of the base cover (131).
  • the fourth reinforcing member (16') is formed of melamine resin or is formed to include melamine resin. As a result, the fourth reinforcing member (16') has improved characteristics of withstand voltage performance, arc-extinguishing performance, and heat-resistant performance.
  • the fourth reinforcing member (16’) may be formed of synthetic resin to reduce production costs.
  • the fourth reinforcing member (16') is attached to the base cover (131) by an adhesive. Specifically, the fourth reinforcing member (16') is attached to an end of the lower surface of the first base cover (1311) and an end of the lower surface of the second base cover (1312) by an adhesive.
  • the adhesive may be a silicone adhesive having high heat resistance and excellent electrical insulation properties.
  • the adhesive is not limited to the silicone adhesive, and may be an adhesive of various other materials, such as epoxy.
  • first base cover (1311) and the second base cover (1312) are combined (or assembled).
  • an adhesive is applied to the first groove (16’a) and the second groove (16’b) of the fourth reinforcing member (16’) and/or the end of the lower surface of the first base cover (1311) and the end of the lower surface of the second base cover (1312).
  • the end of the lower surface of the first base cover (1311) is inserted into the first groove (16’a)
  • the end of the lower surface of the second base cover (1312) is inserted into the second groove (16’b).
  • the first base cover (1311) and the second base cover (1312) are combined (or assembled) by fastening members (bolts and nuts, screws, etc.).
  • the trip unit (136) blocks the current flowing outside and inside the circuit breaker (10) when an abnormal current (fault current) flows through the circuit breaker (10). In other words, the trip unit (136) detects an overcurrent or short-circuit current flowing through the circuit and induces a trip operation of the switching mechanism (135).
  • the trip unit (136) is accommodated in a part of the case (12).
  • the trip unit (136) is electrically connected to the fixed contact (132).
  • the trip unit (136) includes a trip bar, a shooter, an elastic member, etc. to perform a function.
  • the opening/closing mechanism (135) connected to the trip unit (136) is operated, so that an external user can easily recognize that the trip operation has been performed.
  • An opening/closing mechanism (135) is placed (or mounted) on one of the multiple base assemblies (13).
  • the opening/closing mechanism (135) moves the movable contact (133) to provide the power necessary to open/close the circuit.
  • the opening/closing mechanism (135) includes a handle (1351) and various components that allow the handle (1351) to be mounted and driven.
  • the opening/closing mechanism (135) is connected to the shaft (137), and when the opening/closing mechanism (135) rotates, the shaft (137) also rotates. That is, the shaft (137) can rotate by receiving the force of the opening/closing mechanism (135).
  • the opening/closing mechanism (135) rotates by the operation of the trip unit (136). Accordingly, the shaft (137) also rotates, and the fixed contact (132) and the movable contact (133) come into contact with each other or are separated (spaced apart).
  • a rotary pin (1371) is installed through the shaft (137).
  • the shaft (137) receives the opening and closing power of the opening and closing mechanism (135) through the rotary pin (1371) and rotates.
  • the movable contact (133) also rotates and comes into contact with or is separated (spaced) from the fixed contact (132).
  • the movable contact (133) is rotatably positioned (or mounted) on the shaft (137).
  • the fixed contact (132) is placed at a preset distance from the movable contact (133).
  • An arc extinguishing part (134) is arranged around the part where the fixed contact (132) and the movable contact (133) come into contact with each other or are separated.
  • the fixed contactor (132) and the movable contactor (133) make contact, and current flows through the circuit.
  • a trip operation is performed by the operation of the trip unit (136) and the opening/closing mechanism unit (135). That is, the movable contactor (133) rotates and is separated (separated) from the fixed contactor (132), and the current in the circuit is cut off. At this time, an arc is generated around the part where the movable contactor (133) and the fixed contactor (132) are separated (see Fig. 3).
  • the size (strength) of the above arc (A) is proportional to the size of the current.
  • the arc (A) is a state in which gas in the atmosphere is instantaneously brought into a plasma state by voltage.
  • the temperature at the center of the arc (A) reaches 8,000°C to 12,000°C and has explosive expansion pressure.
  • the arc (A) melts and consumes the contacts (132, 133) and deteriorates and destroys the surrounding components.
  • the internal voltage performance of the base assembly (13) (specifically, the base cover (131)) must be maintained so that the performance required for the wiring circuit breaker can be satisfied.
  • the high temperature and high pressure arc (A) that occurs when interrupting an abnormal current (fault current) generates oxides inside the base cover (131) and also generates a gap between the first base cover (1311) and the second base cover (1312) of the base cover (131).
  • the oxides flow out through the gap and flow into the inside of the case (12) of the wiring circuit breaker.
  • the oxides contaminate the inside of the case (12) and deteriorate the insulation performance of the case (12).
  • a circuit breaker (10) improves the withstand voltage performance of the base cover (131) and the insulation performance of the case (12) by providing a reinforcing member (14, 15, 16, 16') and/or by attaching the reinforcing member (14, 15, 16, 16') to the base cover (131) with an adhesive.
  • the persistence of the arc (A) has a significant impact on the performance and durability of the circuit breaker. Therefore, the arc (A) must be quickly blocked, extinguished, and discharged within the arc extinguishing section (134).
  • the arc extinguishing unit (134) extinguishes the arc (A) that occurs when an abnormal current is interrupted.
  • the arc (A) is divided into short arcs as it passes between the grids (1341), and the voltage of the arc (A) increases.
  • the voltage of the arc (A) increases further due to the arc extinguishing gas such as SF6 present in the arc extinguishing part (134). Accordingly, the arc (A) is extinguished as the emission of free electrons is suppressed.
  • An arc (A) occurs when the fixed contact (132) and the movable contact (133) are separated (spaced).
  • the arc (A) passes through the arc extinguishing section (134) and is extinguished, and is discharged to the outside of the circuit breaker (10).
  • the arc extinguishing portion (134) is located adjacent to the position where the fixed contact (132) and the movable contact (133) come into contact. Specifically, the arc extinguishing portion (134) is located adjacent to the position where the fixed contact (132) and the movable contact (133) come into contact and the path along which the movable contact (133) rotates. Therefore, the arc (A) extending along the movable contact (133) easily enters the arc extinguishing portion (134).
  • a plurality of arc extinguishing parts (134) may be provided.
  • the plurality of arc extinguishing parts (134) are each placed adjacent to the position where the fixed contact (132) and the movable contact (133) come into contact.
  • the arc shield (134) includes a support plate (unsigned) and a grid (1341).
  • a plurality of support plates may be provided.
  • the plurality of support plates are arranged to face each other and spaced apart from each other, and support the grid (1341) from both sides.
  • the grid (1341) applies a magnetic force to the generated arc (A).
  • the generated arc (A) passes through the grid (1341) and is extinguished, and is discharged to the outside of the circuit breaker (10).
  • the grid (1341) is formed of a magnetic material. It is intended to apply an attractive force to the arc (A), which is a flow of electrons, and cause the generated arc (A) to flow to the arc exhaust port.
  • the grid (1341) may have a predetermined space formed on one side facing the movable contact (133).
  • the movable contact (133) may be rotated while passing through the space.
  • the rotation path of the movable contact (133) is located between the grids (1341). Accordingly, the arc (A) may be guided through the grid (1341).
  • a plurality of grids (1341) may be provided.
  • a plurality of grids (1341) are arranged in a stacked manner spaced apart from each other. Through the space formed between the grids (1341) and the grids (1341), the generated arc (A) is extinguished and moves.
  • a plurality of grids (1341) can be stacked in a vertical direction and can be stacked at an angle depending on the position of the passage through which the arc (A) is discharged. Accordingly, the arc (A) can pass through the space between the plurality of grids (1341) and move smoothly toward the passage through which the arc (A) is discharged.

Landscapes

  • Breakers (AREA)

Abstract

Est divulgué un disjoncteur à boîtier moulé. Le disjoncteur à boîtier moulé maintient les performances de tension de tenue même lorsqu'un arc se produit lorsqu'un courant de défaut est interrompu. Le disjoncteur à boîtier moulé, selon les modes de réalisation de la présente invention, comprend : un boîtier ; une pluralité d'ensembles de base reçus dans le boîtier ; et un élément de renforcement. L'élément de renforcement est agencé au niveau des ensembles de base. De plus, les ensembles de base sont pourvus d'un couvercle de base comportant un espacement formé à l'intérieur de celui-ci de façon à recevoir à l'intérieur de celui-ci un contact fixe, un contact mobile et une unité d'extinction d'arc. Le couvercle de base comporte une unité de réception d'élément de renforcement formée au niveau de celui-ci pour recevoir l'élément de renforcement à l'intérieur de celui-ci.
PCT/KR2024/014162 2023-10-18 2024-09-20 Disjoncteur à boîtier moulé Pending WO2025084635A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020230139573A KR102865407B1 (ko) 2023-10-18 2023-10-18 배선용 차단기
KR10-2023-0139573 2023-10-18

Publications (1)

Publication Number Publication Date
WO2025084635A1 true WO2025084635A1 (fr) 2025-04-24

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Application Number Title Priority Date Filing Date
PCT/KR2024/014162 Pending WO2025084635A1 (fr) 2023-10-18 2024-09-20 Disjoncteur à boîtier moulé

Country Status (2)

Country Link
KR (1) KR102865407B1 (fr)
WO (1) WO2025084635A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090035902A (ko) * 2007-10-08 2009-04-13 가와무라 일렉트릭 가부시키가이샤 회로 차단기
KR101513209B1 (ko) * 2013-11-08 2015-04-17 엘에스산전 주식회사 배선용 차단기
KR20200114836A (ko) * 2019-03-29 2020-10-07 엘에스일렉트릭(주) 배선용 차단기의 아크 소호 장치
KR20210115323A (ko) * 2020-03-12 2021-09-27 엘에스일렉트릭(주) 베이스 조립체 및 이를 포함하는 배선용 차단기
KR20220076074A (ko) * 2020-11-30 2022-06-08 엘에스일렉트릭(주) 배선용 차단기

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8829381B2 (en) 2012-06-18 2014-09-09 Schneider Electric USA, Inc. High interrupting rating molded case circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090035902A (ko) * 2007-10-08 2009-04-13 가와무라 일렉트릭 가부시키가이샤 회로 차단기
KR101513209B1 (ko) * 2013-11-08 2015-04-17 엘에스산전 주식회사 배선용 차단기
KR20200114836A (ko) * 2019-03-29 2020-10-07 엘에스일렉트릭(주) 배선용 차단기의 아크 소호 장치
KR20210115323A (ko) * 2020-03-12 2021-09-27 엘에스일렉트릭(주) 베이스 조립체 및 이를 포함하는 배선용 차단기
KR20220076074A (ko) * 2020-11-30 2022-06-08 엘에스일렉트릭(주) 배선용 차단기

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KR102865407B1 (ko) 2025-09-26

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