EP1187158B1 - Schutzschalter - Google Patents

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Publication number
EP1187158B1
EP1187158B1 EP00909734A EP00909734A EP1187158B1 EP 1187158 B1 EP1187158 B1 EP 1187158B1 EP 00909734 A EP00909734 A EP 00909734A EP 00909734 A EP00909734 A EP 00909734A EP 1187158 B1 EP1187158 B1 EP 1187158B1
Authority
EP
European Patent Office
Prior art keywords
pole
circuit breaker
case
interrupting unit
interrupting
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.)
Expired - Lifetime
Application number
EP00909734A
Other languages
English (en)
French (fr)
Other versions
EP1187158A1 (de
EP1187158A4 (de
Inventor
Susumu Mitsubishi Denki Kabushiki Kaisha TAKAHASHI
Masahiro Mitsubishi Denki Kabushiki Kaisha FUSHIMI
Setsuo Mitsubishi Denki Kabushiki Kaisha HOSOGAI
Shinji Mitsubishi Denki Kabushiki Kaisha YAMAGATA
Michihiro Mitsubishi Denki Kabush. Kaisha HAYASHI
Ryozo Mitsubishi Denki Kabushiki Kaisha SUZUKI
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1187158A1 publication Critical patent/EP1187158A1/de
Publication of EP1187158A4 publication Critical patent/EP1187158A4/de
Application granted granted Critical
Publication of EP1187158B1 publication Critical patent/EP1187158B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H71/10—Operating or release mechanisms
    • 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
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0235—Contacts and the arc extinguishing space inside individual separate cases, which are positioned inside the housing of the circuit breaker
    • 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
    • H01H71/0257—Strength considerations
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • 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
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together

Definitions

  • the present invention relates to a circuit breaker, and more particularly to a multipole circuit breaker in which a contactor mechanism, an arc extinguishing device, and the like are configured by a single-pole interrupting unit accommodated in a case, and a plurality of such single-pole interrupting units are accommodated in a housing.
  • Fig. 12 is a partially cutaway section view of a conventional art circuit breaker of the assignee of the present invention and disclosed in, for example, the specification of JP-A-11-221501, and shows a closed state.
  • Fig. 13 is a section view taken along the line a-a of Fig. 12.
  • Fig. 14 shows a state where the circuit breaker shown in Fig. 12 performs an electromagnetic repulsive operation and a movable contactor is separated.
  • Fig. 15 shows a state where the circuit breaker shown in Fig. 12 performs a tripping operation.
  • Fig. 16 is a perspective view of an interrupting unit of the circuit breaker shown in Fig. 12.
  • 10 denotes a housing configured by a base 11, a cover 12, and an auxiliary cover 13. These components are formed by a synthetic resin material.
  • the reference numeral 14 denotes a handle formed by a similar material, and 35 denotes a cross bar which is configured by rotor portions 15 that are made of a synthetic resin material, and a coupling pin 16, and in which the rotor portions 15 for plural poles are integrally coupled to one another by the coupling pin 16.
  • the coupling pin 16 is coupled to an opening/closing mechanism 30 which will be described later.
  • the reference numeral 17 denotes a stationary contactor which has a stationary contact 17a
  • 18 denotes a movable contactor which has a movable contact 18a, and which is held by the rotor portion 15 so as to be swingable about a shaft 19.
  • the movable contactor 18 is urged in the direction of the arrow C by a movable element spring 21.
  • the movable element spring 21 is a tension spring.
  • One end of the spring is engaged with an outer peripheral portion of the rotor portion 15, and the other end is engaged with the movable contactor 18, thereby urging the movable contactor 18 in the direction of the arrow C. Therefore, the movable contactor 18 can swing in the direction of the arrow D against the movable element spring 21 irrespective of the rotor portion 15.
  • the movable contactor 18 is interlocked with the swinging operation of the cross bar 35.
  • the movable contactor 18 is drivenly moved by the swinging.
  • the stationary contactor 17, the movable contactor 18, the cross bar 35, and the like constitute a contactor mechanism.
  • the reference numeral 20 denotes a movable element holder which is formed so that a pair of connecting conductors 20a (shown in Fig. 13) clamp the both side faces of the movable contactor 18 from both sides and are pressed by the movable element spring 21 to maintain electrical contact.
  • the reference numeral 22 denotes a trip bar which is swung with being interlocked with an operation of an overcurrent tripping device (not shown). When the trip bar 22 is swung in a counterclockwise direction with using the shaft 28 as the fulcrum, the opening/closing mechanism 30 operates. This operation causes the cross bar 35 to swing, whereby the movable contactor 18 is separated from the stationary contactor 17 to perform automatic interruption (trip). As well known in the art, the opening/closing mechanism 30 can be operated by the handle 14.
  • the reference numeral 23 denotes an interrupting unit which is configured by the contactor mechanism, an arc extinguishing device, and the like. Namely, as shown in Fig. 13, 23a denotes a first case, and 23b denotes a second case. These cases are formed by a synthetic resin, and accommodate the contactor mechanism which is configured by the stationary contactor 17, the movable contactor 18, the shaft 19, the movable element holder 20, the movable element spring 21, and the cross bar 35, and the arc extinguishing device (not shown).
  • the first case 23a and the second case 23b are coupled into one unit by a plurality of rivets 24 (shown in Fig. 12). As shown in Fig.
  • a first case through hole 23c is opened in a center pole and a side wall of the first case 23a adjacent to the center pole
  • a second case through hole 23d is opened in the center pole and a side wall of the second case 23b adjacent to the center pole.
  • a rotor through hole 15a is opened in a pair of side walls of the rotor portions 15 of the cross bar 35.
  • the relationships among the rotor through holes 15a and the case through holes 23c and 23d are made so that, when the opening/closing mechanism 30 sets via the cross bar 35 the movable contactor 18 to a closed state, the case through holes 23c and 23d and the rotor through holes 15a communicate with each other to form main portions of an arc gas relief hole.
  • the arc gas relief hole is configured so that, when the opening/closing mechanism 30 sets via the cross bar 35 the movable contactor 18 to an opened state, the rotor portion 15 is swung, and hence the case through holes 23c and 23d are closed by the rotor portion 15, or namely the arc gas relief hole which has been opened is closed.
  • the reference numeral 25 denotes phase blocks which are formed inside the base 11 and the cover 12.
  • base plates 25a and partition walls 25b which protrude respectively from the base plates 25a in both the sides are formed to set a predetermined dimension L between the center pole and adjacent poles on both the sides.
  • a first air vent channel 25c which communicates with the first case through hole 23c is formed between the partition wall 25b, the center pole of the interrupting unit 23, and an outer wall face 23e of the first case 23a adjacent to the center pole.
  • a second air vent channel 25d which communicates with the second case through hole 23d is formed between the partition wall 25b, the center pole of the interrupting unit 23, and an outer wall face 23f of the second case 23b adjacent to the center pole.
  • the whole of the arc relief hole is formed by the rotor through hole 15a, the first case through hole 23c and the second case through hole 23d, and the first air vent channel 25c and the second air vent channel 25d.
  • the reference numeral 26 denotes a tripping actuator. As shown in Fig. 12, an engaging portion 26a which is to be engaged with the trip bar 22 is formed in one end, and a valve portion 26b is formed in the other end. The actuator is rotatably journaled on a shaft 31.
  • the reference numeral 27 denotes a torsion spring which urges the tripping actuator 26 in a counterclockwise direction, an which normally urges in a direction along which the valve portion 26b closes the first air vent channel 25c and the second air vent channel 25d.
  • the reference numeral 40 shown in Fig. 13 denotes a frame for supporting the opening/closing mechanism 30 which is to be incorporated into the center pole.
  • the blast of the arc gas is guided by an arc extinguishing device which is not shown, to be discharged to the outside, and flows also in, for example, a direction indicated by the arrow B in Fig. 13 to be discharged toward the air vent channels 25c and 25d of the phase block 25 with passing through the rotor through holes 15a and the case through holes 23c and 23d.
  • the blast of the arc gas which is discharged toward the air vent channels 25c and 25d presses the valve portion 26b of the tripping actuator 26 to drive the valve portion in the leftward direction.
  • the tripping actuator 26 is swung in a clockwise direction with using the shaft 31 as the fulcrum.
  • a plurality of single-pole interrupting units 23 are arranged inside the housing 10 having an appropriate width.
  • three single-pole interrupting units 23 each configured by the contactor mechanism, the arc extinguishing device, and the like are accommodated in parallel inside the housing 10 to configure a three-pole circuit breaker.
  • the distance between the stationary contactors 17 for the poles serving as connecting terminals must be set to the predetermined distance L, for example, 35 millimeters, and the phase blocks 25 are disposed respectively between the interrupting units 23. Since the interrupting units 23 are positioned via the phase blocks 25, there are problems in that adjustments in longitudinal, laterally, and vertical directions are difficult to do, and that the width of each of the interrupting units 23 is limited.
  • the three identical interrupting units 23 are arranged in parallel, and side walls 23h and 23j of the first case 23a, and side walls 23m and 23n of the second case 23b are formed so as to have the same thickness.
  • the side walls 23h, 23j, 23m, and 23n are reinforced by the frame 40 for supporting the opening/closing mechanism 30.
  • the outer side walls 23h, 23j, 23m, and 23n are reinforced by a base side wall 11a of the housing 10.
  • the side walls 23m and 23n, and 23h and 23j, on the side of the center pole, of the case 23b of the interrupting unit 23 for the left pole, and the case 23a of the interrupting unit 23 for the right pole are not reinforced and are thin, thereby producing a further problem in that the side walls are easily broken by a blast of arc gas which is produced at interruption of a large current such as a short-circuit current.
  • the invention has been conducted in order to solve the problems. It is an object of the invention to provide a circuit breaker in which it is not required to dispose a phase block between interrupting units, and a case constituting an interrupting unit is hardly broken.
  • US patent No. 4, 680, 562 corresponding to the preamble of claim 1, discloses an integral circuit interrupter with separable modules.
  • the circuit breaker comprises an electrically insulating housing, two separable contacts to operate between open and closed positions, a tripping mechanism and a modular assembly for disassembling separate components of circuit breakers.
  • the circuit breaker according to the invention is a circuit breaker having: a contactor mechanism which is formed so that, when a short-circuit current flows through a current-flowing circuit, electromagnetic repulsion occurs between a movable contactor and a stationary contactor; an opening/closing mechanism which is coupled via a cross bar to the movable contactor of the contactor mechanism, thereby causing the movable contactor to perform an opening/closing operation; a tripping mechanism which, when a current flowing through the current-flowing circuit exceeds a predetermined value, operates a trip bar to open the contactor mechanism via the opening/closing mechanism; an arc extinguishing device which attracts an arc in a predetermined direction, the arc being generated when the contactor mechanism is opened; and a housing which is formed so as to accommodate the mechanisms and the device, wherein the contactor mechanism, the cross bar, and the arc extinguishing device are accommodated in a case made of an insulating material to constitute a single-
  • the circuit breaker comprises: an interrupting unit for a center pole; and an interrupting unit for an adjacent pole, the interrupting unit being adjacent to the interrupting unit for the center pole and the housing, and a thickness of a side wall of the case of the interrupting unit for the adjacent pole, on a side adjacent to the center pole is larger than a thickness of a side wall on a side adjacent to the housing.
  • a fastening portion is disposed in the interrupting unit for the adjacent pole, and the interrupting unit is fixed in the fastening portion to a base of the housing by a fastening member.
  • the circuit breaker comprises a protrusion which is disposed on the case of the interrupting unit for the center pole, and a recess which is disposed in the case of the interrupting unit for the adjacent pole, and which is to be fitted with the protrusion, to integrate plural interrupting units with each other.
  • the protrusion has a wedge-like shape, and the recess is a dovetail groove.
  • the circuit breaker comprises: an interrupting unit for a center pole; and an interrupting unit for an adjacent pole, the interrupting unit being adjacent to the interrupting unit for the center pole and the housing, and a thickness of a side wall of the case of the interrupting unit for the adjacent pole, on a side adjacent to the housing is larger than a thickness of a side wall on a side adjacent to the center pole.
  • the circuit breaker further comprises a recess which is disposed in the case of the interrupting unit, and a stationary contactor having a protrusion which is to be fitted with the recess.
  • Fig. 1 is a perspective view of a circuit breaker showing Embodiment 1 of the invention.
  • Fig. 2 is a plan view of the circuit breaker of Fig. 1 in which a cover is removed away.
  • Fig. 3 is a section view taken along the line b-b of Fig. 2.
  • Fig. 4 is a plan section view showing main portions of interrupting units of the circuit breaker.
  • interrupting units 50, 53, and 56 which will be described later are accommodated in the housing 10 configured by the base 11, the cover 12, and the auxiliary cover 13 that are formed by an insulating material such as a synthetic resin material.
  • 50 denotes the interrupting unit for the center pole (hereinafter, referred to as C-pole)
  • 53 denotes the interrupting unit for the left pole (hereinafter, referred to as L-pole) which is adjacent to the center pole
  • 56 denotes the interrupting unit for the right pole (hereinafter, referred to as R-pole) which is adjacent to the center pole.
  • the reference numeral 51 denotes a first case for the C-pole
  • 52 denotes a second case for the C-pole
  • 54 denotes a first case for the L-pole
  • 55 denotes a second case for the L-pole
  • 57 denotes a first case for the R-pole
  • 58 denotes a second case for the R-pole.
  • These cases are formed by an insulating material such as a synthetic resin, and accommodate a contactor mechanism which is configured by the stationary contactor 17, the movable contactor 18, the shaft 19, the movable element holder 20, the movable element spring 21, and the cross bar 35, and an arc extinguishing device 59 (shown in Fig. 3).
  • Each of the interrupting units 50, 53, and 56 is coupled by a plurality of rivets 24 to be formed as a unit.
  • a side wall 51a of the first case 51 for the C-pole and a side wall 52a of the second case 52 have the same thickness
  • a side wall 51b of the first case 51 and a side wall 52b of the second case 52 have the same thickness.
  • the thicknesses are equal to those of the apparatus of the conventional art.
  • a side wall 54a of the first case 54 for the L-pole and the side wall 51a of the first case 51 for the C-pole have the same thickness
  • a side wall 54b of the first case 54 for the L-pole and the side wall 51b of the first case 51 for the C-pole have the same thickness.
  • the thickness of a side wall 55a of the second case 55 for the L-pole is formed to be larger than that of the side wall 54a of the first case 54 for the L-pole
  • the thickness of a side wall 55b of the second case 55 for the L-pole is formed to be larger than that of the side wall 54b of the first case 54 for the L-pole.
  • a side wall 58a of the second case 58 for the R-pole and the side wall 52b of the second case 52 for the C-pole have the same thickness
  • a side wall 58b of the second case 58 for the R-pole and the side wall 52b of the second case 52 for the C-pole have the same thickness.
  • the walls are thin in the same manner as those of the apparatus of the conventional art.
  • the thickness of a side wall 57a of the first case 57 for the R-pole is formed to be larger than that of the side wall 58a of the second case 58 for the R-pole
  • the thickness of aside wall 57b of the first case 57 for the R-pole is formed to be larger than that of the side wall 58b of the second case 58 for the R-pole.
  • the trip bar 22 is swung with being interlocked with an operation of an overcurrent tripping device (not shown), the engagement with the opening/closing mechanism 30 by a well-known toggle link mechanism is cancelled, and automatic interruption (trip) is performed at an earlier time after the occurrence of the arc A.
  • the contactor mechanism, the cross bar 35, and the arc extinguishing device 59 are accommodated in a case made of an insulating material to constitute a single-pole interrupting unit, and a plurality of such single-pole interrupting units are closely juxtaposed to constitute a plural-pole interrupting unit.
  • the portions of the interrupting units 53 and 56 for the L- and R-poles on the side of the center pole i.e., the thicknesses of the side walls 55a and 55b of the second case 55 for the L-pole, and those of the side walls 57a and 57b of the first case 57 for the R-pole are formed to be larger, and the outer end faces of the side walls 55a, 55b, 57a, and 57b abut against the side walls 51a, 51b, 52a, and 52b for the C-pole, so as to ensure the predetermined distances L. Therefore, the side walls are enhanced in strength, so that the cases 55 and 57 are hardly broken by a blast of arc gas which is produced at interruption of a large current such as a short-circuit current.
  • Fig. 5 is a plan section view showing main portions of interrupting units of a circuit breaker showing Embodiment 2 of the invention.
  • Fig. 6 is a section view taken along the line c-c of Fig. 5.
  • the reference numerals 55c and 55e denote a fastening portion and a through hole (which is disposed below the fastening portion 55c and corresponds to a through hole 57c, and which is not shown) formed in the second case 55 for the L-pole
  • 57c and 57e denote a fastening portion and a through hole formed in the first case 57 for the R-pole.
  • the interrupting units 53 and 56 are fixed to the base 11 of the housing 10 by a fastening member configured by an attachment screw 60, a nut 61, and the like.
  • a self-tapping screw (not shown) may be used to be screwed into cases 55 and 57 in which the through holes 55e and 57e are not opened, so as to fix the interrupting units to the base 11.
  • the interrupting units may be fixed to the base 11 by using rivets (not shown).
  • the interrupting units 53 and 56 for the L- and R-poles are fixed to the base 11 by using the fastening member, and hence it is possible to prevent the interrupting units 53 and 56 for the L- and R-poles from being moved in a direction along which the interrupting units are separated from the interrupting unit 50 for the C-pole by the electromagnetic repulsive force generated by the current flowing through a conductor for the C-pole and the currents flowing through the L- and R-poles in the same direction, and the base 11 and the cover 12 constituting the housing 10 from being broken.
  • Fig. 7 is a plan section view showing main portions of interrupting units of a circuit breaker showing Embodiment 3 of the invention.
  • 17 to 21, and 50 to 58 are identical with those of Embodiment 1.
  • the reference numerals 51d, 51e, 51f, and 51g denote a plurality of protrusions which are formed on the side walls 51a and 51b of the first case 51 for the C-pole, and 52d, 52e, 52f, and 52g denote a plurality of protrusions which are formed on the side walls 52a and 52b of the second case 52.
  • the reference numerals 55d and 55g denote a plurality of recesses which are formed in the side walls 55a and 55b of the second case 55 for the L-pole
  • 57d and 57g denote a plurality of recesses which are formed in the side walls 57a and 57b of the first case 57 for the R-pole
  • the reference numerals 40a and 40b denote a plurality of through holes which are formed in the frame 40.
  • Embodiment 3 when the interrupting units 53 and 56 for the L- and R-poles are to be combined with both the sides of the interrupting unit 50 for the C-pole to configure interrupting units of a three-pole circuit breaker, the plural protrusions 51d and 51g, and 52d and 52g are fitted into the plural recesses 55d and 55g, and 57d and 57g, and the plural protrusions 51e, 51f, 52e, and 52f are fitted into the through holes 40a and 40b of the frame 40. Therefore, the plural interrupting units 50, 53, and 56 can be surely positioned and integrated with each other, whereby an assembling work is facilitated.
  • the interrupting unit 50 for the C-pole, and the interrupting units 53 and 56 for the L- and R-poles are restricted in mutual movement in a plane perpendicular to the shaft 19. Therefore, it is possible to prevent the interrupting unit 50, 53, or 56 for only one pole from being moved at interruption.
  • Such a fitting portion configured a protrusion and a recess is required to be disposed in at least one of the interrupting units 50, 53, and 56. As in Embodiment 3, preferably, a plurality of fitting portions may be disposed.
  • Fig. 8 is a plan section view showing main portions of interrupting units of a circuit breaker showing Embodiment 4 of the invention.
  • 17 to 21, 40, 40a, 40b, 50 to 58, 51e, 51f, 52e, and 52f are identical with those of Embodiment 1.
  • the reference numerals 51h and 51j denote a plurality of wedge-like protrusions which are formed on the side walls 51a and 51b of the first case 51 for the C-pole
  • 52h and 52j denote a plurality of wedge-like protrusions which are formed on the side walls 52a and 52b of the second case 52
  • the reference numerals 55h and 55j denote a plurality of dovetail grooves which are formed in the side walls 55a and 55b of the second case 55 for the L-pole
  • 57h and 57j denote a plurality of dovetail grooves which are formed in the side walls 57a and 57b of the first case 57 for the R-pole.
  • Embodiment 4 when the interrupting units 53 and 56 for the L- and R-poles are to be combined with both the sides of the interrupting unit 50 for the C-pole to configure interrupting units of a three-pole circuit breaker, the plural wedge-like protrusions 51h and 51j, and 52h and 52j are fitted into the plural dovetail grooves 55h and 55j, and 57h and 57j. Therefore, the plural interrupting units 50, 53, and 56 can be surely positioned and integrated with each other, whereby an assembling work is facilitated.
  • Fig. 9 is a plan section view of main portions of interrupting units of a circuit breaker showing Embodiment 5 of the invention.
  • 17 to 21, 40, and 50 to 58 are identical with those of Embodiment 1.
  • the side wall 51a of the first case 51 for the C-pole and the side wall 52a of the second case 52 have the same thickness
  • the side wall 51b of the first case 51 for the C-pole and the side wall 52b of the second case 52 have the same thickness.
  • the walls are thin in the same manner as those of the apparatus of the conventional art.
  • the side wall 55a of the second case 55 for the L-pole and the side wall 52a of the second case 52 for the C-pole have the same thickness
  • the side wall 55b of the second case 55 for the L-pole and the side wall 52b of the second case 52 for the C-pole have the same thickness.
  • the thickness of the side wall 54a of the first case 54 for the L-pole is formed to be larger than that of the side wall 55a of the second case 55 for the L-pole
  • the thickness of the side wall 54b of the first case 54 for the L-pole is formed to be larger than that of the side wall 55b of the second case 55 for the L-pole.
  • the side wall 57a of the first case 57 for the R-pole and the side wall 51a of the first case 51 for the C-pole have the same thickness
  • the side wall 57b of the first case 57 for the R-pole and the side wall 51b of the first case 51 for the C-pole have the same thickness.
  • the walls are thin in the same manner as those of the apparatus of the conventional art.
  • the thickness of the side wall 58a of the second case 58 for the R-pole is formed to be larger than that of the side wall 57a of the first case 57 for the R-pole
  • the thickness of the side wall 58b of the second case 58 for the R-pole is formed to be larger than that of the side wall 57b of the first case 57 for the R-pole.
  • the reference numerals 51m and 51n denote positioning protrusions which protrude from the side walls 51a and 51b of the first case 51 for the C-pole
  • 52m and 52n denote positioning protrusions which protrude from the side walls 52a and 52b of the second case 52 for the C-pole.
  • the protrusions are configured so that their tip end portions abut against the outer walls of the cases 55 and 57 for the adjacent poles to ensure the predetermined distances L, respectively.
  • the base side wall 11a (indicated by the two-dot chain line) of the portions which are adjacent to the side walls 54a and 54b, and 58a and 58b can be formed to be thin.
  • the material cost of the base 11 is low because the base side wall 11a can be formed to be thin, with the result that an economical circuit breaker can be obtained.
  • Fig. 10 is a view showing an interrupting unit of a circuit breaker showing Embodiment 6 of the invention, (A) is a front section view, and (B) is a side view.
  • Fig. 11 is a view showing a stationary contactor which is to be incorporated into the interrupting unit of Fig. 10, (A) is a plan view, (B) is a front view, and (C) is a side view.
  • 15 to 21, 24, and 50 to 52 are identical with those of Embodiment 1, and their description is omitted.
  • the reference numeral 17b denotes a protrusion which is disposed on a terminal portion 17c of the stationary contactor 17, 50s denote a terminal take-out port which is disposed in the cases 51 and 52 of the interrupting unit 50, and 50t denotes a case recess which is disposed continuously with the terminal take-out port 50s.
  • the stationary contactor 17 is incorporated into the terminal take-out port 50s, the protrusion 17b is fitted into the case recess 50t. At this time, gaps G are formed between the end faces of the terminal portion 17c and side walls 51u and 52u of the terminal take-out port 50s.
  • the protrusion 17b is disposed on the stationary contactor 17 so as to be fitted into the case recess 50t of the cases 51 and 52 of the interrupting unit 50.
  • a short-circuit current is interrupted, or where an external wire is to be fastened by a terminal screw (not shown) to the terminal portion 17c
  • the rotating force is received by the case recess 50t via the protrusion 17b, and the rotating force does not act on the side walls of the terminal take-out port 50s because of the gaps G, and acts on the thick portions of high strength between the case recess 50t and the end faces 51v and 52v of the interrupting units 51 and 52. Consequently, the interrupting units 51 and 52 are hardly broken.
  • phase blocks 25 are not disposed, and the interrupting unit can be made wider, and hence the case recess 50t also can be made wider, so that the embodiment can be favorably used.
  • a contactor mechanism, a cross bar, and an arc extinguishing device are accommodated in a case made of an insulating material to constitute a single-pole interrupting unit, and a plurality of single-pole interrupting units are closely juxtaposed to constitute a plural-pole interrupting unit. Therefore, it is possible to obtain a circuit breaker of a high rated interrupting capacity in which, unlike a circuit breaker of the conventional art, phase blocks that are disposed respectively between interrupting units in order to ensure predetermined distances between stationary contactors for poles are not necessary, which is economical, and in which the predetermined distances can be easily ensured, and the interrupting units can be made wider.
  • the circuit breaker of the invention comprises: an interrupting unit for a center pole; and an interrupting unit for an adjacent pole, the interrupting unit being adjacent to the interrupting unit for the center pole and a housing, and a thickness of a side wall of the case of the interrupting unit for the adjacent pole, on a side adjacent to the center pole is larger than a thickness of a side wall on a side adjacent to the housing. Therefore, side walls are enhanced in strength, so that the cases are hardly broken by a blast of arc gas which is produced at interruption of a large current such as a short-circuit current.
  • a fastening portion is disposed in the interrupting unit for the adjacent pole, and the interrupting unit is fixed in the fastening portion to a base of the housing by a fastening member. Therefore, the interrupting unit for the adjacent pole is hardly moved by the electromagnetic repulsive force generated by the current flowing through a conductor for the Center-pole and the current flowing through the adjacent pole in the same direction, and the base and the cover constituting the housing can be prevented from being broken.
  • a protrusion which is disposed on the case of the interrupting unit for the center pole, and a recess which is disposed in the case of the interrupting unit for the adjacent pole, and which is to be fitted with the protrusion are disposed. Therefore, the plural interrupting units can be surely positioned and integrated with each other, and an assembling work is facilitated.
  • the protrusion has a wedge-like shape and the recess is a dovetail groove. Therefore, the plural interrupting units can be surely positioned and integrated with each other, whereby an assembling work is facilitated. Moreover, the interrupting unit for the adjacent pole is hardly moved by the electromagnetic repulsive force generated by the current flowing through a conductor for the Center-pole and the current flowing through the adjacent pole in the same direction, and the base and the cover constituting the housing can be prevented from being broken.
  • the circuit breaker of the invention comprises: an interrupting unit for a center pole; and an interrupting unit for an adjacent pole, the interrupting unit being adjacent to the interrupting unit for the center pole and the housing, and a thickness of a side wall of the case of the interrupting unit for the adjacent pole, on a side adjacent to the housing is larger than a thickness of a side wall on a side adjacent to the center pole.
  • an expensive material of excellent strength is used as the material of the base into which the interrupting units are to be accommodated, therefore, the material cost of the base is low because the base side wall can be formed to be thin, with the result that an economical circuit breaker can be obtained.
  • a recess which is disposed in the case of the interrupting unit, and a stationary contactor having a protrusion which is to be fitted with the recess are disposed.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (7)

  1. Trennschalter mit einer Vielzahl von einpoligen Abschalteinheiten (50, 53, 56), wobei jede der Einheiten einen Schützenmechanismus (contactor mechanism) (17 bis 21), ein Crossbar (35), und eine Lichtbogenlöschungsvorrichtung (59) aufweist, wobei die Schützenmechanismen, die ein bewegliches Schütz (18) und ein feststehendes Schütz (17) aufweisen, derart gebildet sind, dass, wenn ein Kurzschluss-Strom durch einen stromführenden Stromkreis fliesst, zwischen dem beweglichen Schütz (18) und dem feststehenden Schütz (17) elekromagnetische Repulsion auftritt; wobei der Trennschalter auch einen Öffnungs-/Schließ-Mechanismus (30) aufweist, der über jedes der Crossbars mit jedem der beweglichen Schütze des Schützenmechanismus verbunden ist und dadurch verursacht, dass jedes bewegliche Schütz einen Öffnungs-/Schließ-Betrieb durchführt; wobei der Trennschalter auch einen Schnellauslöser aufweist, der, wenn ein durch den stromführenden Stromkreis fließender Strom einen vorbestimmten Wert überschreitet, einen Auslösestab (22) betreibt, um die Schützenmechanismen über den Öffnungs-Schließ-Mechanismus zu öffnen, und wobei jede der Lichtbogenlöschungsvorrichtungen einen Lichtbogen (A) in eine vorbestimmte Richtung anzieht, wobei der Lichtbogen erzeugt wird, wenn die Schützenmechanismen geöffnet werden; dadurch gekennzeichnet, dass ein Gehäuse (10) geformt ist, um die Schützenmechanismen und die Lichtbogenlöschungsvorrichtungen aufzunehmen, wobei der Schützenmechanismus, das Crossbar, und die Lichtbogenlöschungsvorrichtung von jeder der Abschalteinheiten in einem aus einem isolierenden Material hergestellten Behälter (51; 52; 54; 55; 57; 58) untergebracht sind, um die einpolige Abschalteinheit zu bilden, und wobei die Vielzahl von einpoligen Abschalteinheiten dicht nebeneinander liegt, um eine einpolige Abschalteinheit derart zu bilden, dass angrenzende Seitenwände der zwei jeweils nebeneinander liegenden einpoligen Einheiten gegeneinanderstoßen.
  2. Trennschalter nach Anspruch 1, bei dem der Trennschalter aufweist: eine Abschalteinheit für einen Mittelpol (50); und eine Abschalteinheit für einen angrenzenden Pol (53; 56), wobei die Abschalteinheit an die Abschalteinheit für den Mittelpol und das Gehäuse grenzt, und wobei eine Stärke einer Seitenwand (55a, 55b, 57a, 57b) des Behälters der Abschalteinheit für den angrenzenden Pol auf einer an den Mittelpol grenzenden Seite größer ist, als eine Stärke einer Seitenwand (54a, 54b, 58a,58b) auf einer an das Gehäuse grenzenden Seite.
  3. Trennschalter nach Anspruch 1 oder 2, bei dem ein Befestigungsabschnitt (55c, 55e, 57c, 57e) in der Abschalteinheit für den angrenzenden Pol angeordnet ist, und wobei die Abschalteinheit in dem Befestigungsabschnitt an eine Basis (11) des Gehäuses durch ein Befestigungselement (60, 61) befestigt ist.
  4. Trennschalter nach einem der Ansprüche 1 bis 3, bei dem der Trennschalter einen Vorsprung (51d bis 51g), der auf dem Behälter der Abschalteinheit für den Mittelpol angeordnet ist, und eine Aussparung (55d, 55g, 57d, 57g), die in dem Behälter der Abschalteinheit für den angrenzenden Pol angeordnet ist, und die mit dem Vorsprung zusammenzufügen ist, aufweist.
  5. Trennschalter nach Anspruch 4, bei dem der Vorsprung eine keilartige Form (51h, 51j, 52h, 52j) aufweist, und die Aussparung (55h, 55j, 57h, 57j) eine Schwalbenschwanznut ist.
  6. Trennschalter nach Anspruch 1, bei dem der Trennschalter aufweist: eine Abschalteinheit für einen Mittelpol; und eine Abschalteinheit für einen angrenzenden Pol, wobei die Abschalteinheit an die Abschalteinheit für den Mittelpol und das Gehäuse grenzt, und wobei eine Stärke einer Seitenwand des Behälters der Abschalteinheit für den angrenzenden Pol auf einer an das Gehäuse grenzenden Seite größer ist, als eine Stärke einer Seitenwand auf einer an den Mittelpol grenzenden Seite.
  7. Trennschalter nach einem der Ansprüche 1 bis 6, bei dem der Trennschalter eine Aussparung (50t), die in dem Behälter der Abschalteinheit angeordnet ist, und ein feststehendes Schütz, das einen Vorsprung (17b) aufweist, welcher mit der Aussparung zusammenzufügen ist, aufweist.
EP00909734A 2000-03-17 2000-03-17 Schutzschalter Expired - Lifetime EP1187158B1 (de)

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EP1187158B1 true EP1187158B1 (de) 2004-12-15

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EP (1) EP1187158B1 (de)
JP (1) JP4232370B2 (de)
KR (1) KR100445886B1 (de)
CN (1) CN1196155C (de)
DE (1) DE60016743T2 (de)
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WO (1) WO2001071750A1 (de)

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Publication number Priority date Publication date Assignee Title
EP1473750A1 (de) * 2003-04-30 2004-11-03 Siemens Aktiengesellschaft elektromechanisches Schaltgerät
JP4650023B2 (ja) * 2005-02-25 2011-03-16 富士電機機器制御株式会社 回路遮断器
AT509250A1 (de) 2008-03-05 2011-07-15 Moeller Gebaeudeautomation Gmbh Schaltgerät
CN101604600B (zh) * 2009-06-05 2012-10-03 上海诺雅克电气有限公司 带辅助支撑件的多极断路器
FR2950476B1 (fr) 2009-09-18 2011-09-16 Schneider Electric Ind Sas Assemblage d'un dispositif de coupure multipolaire a double enveloppe et disjoncteur le comprenant
FR2950475B1 (fr) 2009-09-18 2011-09-16 Schneider Electric Ind Sas Entretoise fonctionnelle de separation des ampoules dans un dispositif de coupure multipolaire, et disjoncteur
KR200482130Y1 (ko) * 2012-03-05 2016-12-20 엘에스산전 주식회사 배선용 차단기
ES2694124T3 (es) * 2012-06-11 2018-12-18 Abb Oy Aparato de conmutación de la corriente eléctrica
CN207441642U (zh) * 2017-08-09 2018-06-01 施耐德电气工业公司 漏电断路器
CN109559947B (zh) * 2017-09-27 2020-11-27 常熟开关制造有限公司(原常熟开关厂） 一种多极断路器

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JPS58131625A (ja) * 1982-01-30 1983-08-05 松下電工株式会社 多極型回路遮断器
JPS60250540A (ja) * 1984-05-25 1985-12-11 松下電工株式会社 デアイオンスイツチ
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JPH0753243Y2 (ja) * 1987-06-12 1995-12-06 富士電機株式会社 多極回路遮断器
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JPH01265423A (ja) * 1988-04-18 1989-10-23 Fuji Electric Co Ltd 回路遮断器
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JPH087741A (ja) * 1994-06-20 1996-01-12 Fuji Electric Co Ltd 電気機器の端子カバー

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Publication number Publication date
DE60016743T2 (de) 2005-12-01
CN1350695A (zh) 2002-05-22
KR20010112489A (ko) 2001-12-20
CN1196155C (zh) 2005-04-06
EP1187158A1 (de) 2002-03-13
KR100445886B1 (ko) 2004-08-25
WO2001071750A1 (fr) 2001-09-27
DE60016743D1 (de) 2005-01-20
EP1187158A4 (de) 2003-07-09
JP4232370B2 (ja) 2009-03-04
ES2234573T3 (es) 2005-07-01

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