EP0161968A1 - Schalter mit Differentialfunktion - Google Patents

Schalter mit Differentialfunktion Download PDF

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Publication number
EP0161968A1
EP0161968A1 EP85400762A EP85400762A EP0161968A1 EP 0161968 A1 EP0161968 A1 EP 0161968A1 EP 85400762 A EP85400762 A EP 85400762A EP 85400762 A EP85400762 A EP 85400762A EP 0161968 A1 EP0161968 A1 EP 0161968A1
Authority
EP
European Patent Office
Prior art keywords
arm
circuit breaker
breaker according
axis
sensitive relay
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.)
Withdrawn
Application number
EP85400762A
Other languages
English (en)
French (fr)
Inventor
Norbert Signorelli
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.)
Legrand SA
Original Assignee
Legrand SA
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 Legrand SA filed Critical Legrand SA
Publication of EP0161968A1 publication Critical patent/EP0161968A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
    • H01H83/226—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with differential transformer
    • 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
    • H01H71/04—Means for indicating condition of the switching device

Definitions

  • the present invention relates generally to circuit breakers.
  • a circuit breaker comprises, overall, for the control of a movable contact, a latching mechanism, which is established between said movable contact and an interlocking and tripping lever, and which itself even two hooking members capable of engaging disengageably with each other, in cooperation with magneto-thermal tripping members, capable of causing, in the event of an overload and / or a short circuit, the release relative to each other of said hooking members, and thereby the release of the movable contact.
  • Such a differential function is usually provided by a relay, which, in response to a possible fault, is capable of intervening, via a transmission, on the latching mechanism, for breaking of that -ci, that is to say for release from each other, as before, of its attachment members.
  • the relay thus implemented can be a relay of the so-called percussion type, in which, in the event of a fault, a movable member is positively “called", the energy necessary for its propulsion then being drawn from the network concerned .
  • the relay operates only if the network is itself supplied.
  • the relay used to provide the desired differential function can also be a relay of the so-called release type, or sensitive relay, which, in response to a possible fault, is satisfied with the only differential current then circulating between the phases in question or between phase and neutral for its triggering, the energy necessary for the propulsion of its movable member then being due to a spring associated with said movable member and normally kept under stress .
  • this movable member is simply released, and no longer "called", as previously.
  • the transmission interposed between such a sensitive relay and the latching mechanism to be broken is most often an active transmission, that is to say a transmission which, regardless of the energy storage capacity that by itself presents the spring associated with the movable member of the sensitive relay, always comprises an amplifier stage capable of developing, when this movable member is released, and in response to it, an energy greater than that of said spring .
  • patent FR-A-2,128,274 however, and it is substantially the same in patent FR-A-2,486,304, it is proposed the implementation of a transmission which can be described as direct in the extent that, by only transmitting the effort applied to it, it is itself devoid of any means of amplification.
  • the present invention generally relates to a provision making it possible, on the contrary, to add, in a simple and space-saving manner, to a circuit breaker with magneto-thermal trip members, a differential function with sensitive relay.
  • a circuit breaker of the type comprising, in particular, on the one hand, a latching mechanism, which, for controlling a movable contact, is established between said movable contact and a joystick engagement and release, and which itself comprises two attachment members capable of engaging disengageably with each other, and, on the other hand, a sensitive relay, which, in response to a possible differential current between the phases in question or between phase and neutral, is capable of intervening, by means of a direct transmission, on said hooking mechanism, for the release relative to one another of these organs attachment
  • this circuit breaker being characterized in that said transmission comprises a part, called below for simple convenience, transmission part, which, in one piece, forms a support barrel, which is rotatably mounted around its axis, and, carried jointly by this support shaft, two arms, which are each derived laterally from said support barrel, substantially perpendicular to the axis thereof and substantially orthogonally to one another, namely a first arm, or control arm, which is subjected to the
  • a display arm which is either rotatably mounted around the axis of the barrel of the transmission part, or carried by this barrel, said display arm carrying preferably a mark, which is retracted for the engagement position of this display arm, and which is visible for its trigger position.
  • said transmission part carries another arm, or resetting arm, intended to cooperate with a cam integral with the engagement and tripping lever, for return to the initial position of the control arm, and thus automatic resetting of the sensitive relay.
  • the display arm when carried by the transmission part, it may be associated with the latter a specific manual reset means, and it is preferably a pusher, which is mounted movable transversely relative to to the interlocking and tripping lever, and the path of which interferes with that of the latter, so that, in the advanced reset position, it opposes the movement of said interlocking and tripping lever.
  • the latching member on which the transmission acts being rotatably mounted about an axis which extends in a first direction, parallel in practical on the main faces of the circuit breaker housing, the axis of the support barrel of the transmission part that this transmission comprises extends in a second direction orthogonal to the previous one, it follows from the above that the desired differential function can advantageously be housed in a minimal footprint, corresponding for example simply to that of a monopolar magneto-thermal trip module.
  • circuit breaker according to the invention can for example be housed in a housing 120, of which only the outline and certain elements have been shown in the figures, and that a central partition 121 of this housing 120, parallel to the main faces or walls 112 thereof ci, the division into two compartments, one, 10, corresponding overall to the circuit breaker housing requirementj.t in patent EP-A-0028958 and therefore serving to house the magneto-thermal function of this circuit breaker, the other, 10 ', used, according to the invention, for housing a differential function added to the previous one.
  • the compartment 10 ′ the outline of which is identical to that of the compartment 10, since housed in the same general housing 120 as the latter, has, transversely, substantially the same extension as that of this compartment 10, its volume thus corresponding substantially to that of a monopolar magneto-thermal module.
  • the case 120 thus formed has, at its base, a fixing sole 113 adapted to allow it to be fixed on a rail of the so-called cap type.
  • the circuit breaker according to the invention comprises, in particular, on the one hand, a latching mechanism, which, for controlling a mobile contact not shown, is established between said movable contact and an interlocking and tripping lever 37, and which itself comprises two hooking members 32, 74 capable of engaging, disengageably, with each other, as shown in the Figures 1, 2, for maintaining said movable contact in the latching position.
  • the attachment member 32 is formed by the free end of the opening spring 29 permanently urging the movable contact in the direction of its tripping position, and, jointly, the hooking member 74 is constituted by a pin carried transversely projecting by a pallet 51, which, belonging to the same movable assembly as the engagement and trigger lever 37, and pivotally mounted on it, forms, with a cylinder head, not shown, also belonging to this movable assembly, an electromagnetic trip member.
  • the pin constituting the hooking member 74 is, like this one, rotatably mounted about an axis corresponding substantially to the base of this pallet 51.
  • This axis therefore extends in a first direction D1, which is parallel to the main faces 112 of the housing 120, and which is also parallel to the fixing flange 113 thereof.
  • the direction Di is shown diagrammatically in broken lines in FIGS. 1 and 2.
  • the differential function provided according to the invention in compartment 10 ′ of the housing 120 also comprises a sensitive relay 122, which, in response to a possible differential current between the phases in question, or between phase and neutral, must be suitable to intervene, via a transmission 123, on the latching mechanism consisting of the latching members 32, 74 mentioned above, for the release, relative to each other, of these members attachment, and thus the release of the mobile contact.
  • this sensitive relay 122 is for this purpose controlled by a toroid 124 on which are wound, on the one hand, a thin winding, not visible in the figures, connected to its terminals, and, on the other hand share, two large windings 1251, 125 2 , the number of turns of which depends on the greater or lesser sensitivity to be ensured, and which are each respectively connected in bypass on the connection terminals of the circuit breaker.
  • the toroid 124 and the windings 125 1 , 125 2 are housed in the compartment 10 ′ of the housing 120.
  • the output element of the sensitive relay 122 which forms the active element is constituted by a pusher 126.
  • this pusher 126 is constituted by a core mounted movable along its axis, and, in these embodiments, this axis extends along a direction D'1, which, like the previous direction D1, is also parallel both to the main faces 112 of the housing 120 and to the fixing flange 113 thereof.
  • the direction D'1 is therefore parallel to the first direction D1.
  • this sensitive relay 122 When this sensitive relay 122 is activated, its pusher 126 is propelled axially by a spring not shown, along its axis, and therefore along the arrow F1 in FIG. 2.
  • the transmission 123 intervening between the sensitive relay 122, and more precisely the pusher 126 thereof, on the one hand, and the latching mechanism constituted by the latching members 32, 74, on the other hand, is a direct transmission.
  • this transmission 123 comprises a 'part 130, called here for simple convenience, transmission part, which, in one piece, forms, on the one hand, a support barrel 131, which is rotatably mounted around from its axis, and, on the other hand, carried jointly by this support barrel 131, two arms, which each come laterally from said support barrel, substantially perpendicular thereto and substantially orthogonally to one another, namely an arm 128, or control arm, which is subjected to the sensitive relay 122, and more precisely to the pusher 126 thereof, and an arm 129, or action arm, which, wedged on the previous one, is suitable to act on one of the attachment members 32, 74, and, more precisely, in the embodiments shown, on the pallet 51 carrying the attachment member 74.
  • a 'part 130 called here for simple convenience, transmission part, which, in one piece, forms, on the one hand, a support barrel 131, which is rotatably mounted around from its axis, and, on the other hand, carried jointly by this support barrel
  • the axis of the support barrel 131 of the transmission part 130 extends in a second direction D2 orthogonal to the first direction Dl specified above.
  • This second direction D2 is shown diagrammatically in broken lines in FIG. 1.
  • the support barrel 131 of the transmission part 130 has, at its ends, in the embodiment more particularly shown in FIGS. 1 to 6, cylindrical extensions of circular section 132 engaged in journalling in bearings 133 secured to the housing 120.
  • control arm 128 and the action arm 129 carried by this support barrel 131 are established at a distance from one another along the latter.
  • the action of the sensitive relay 122, and more precisely of its push-button 126, on the control arm 128 is effected by means of an adjustment member 134, which, carried by said arm control 128, is mounted adjustable in position thereon relative to said sensitive relay 122.
  • this adjusting member 134 is a screw which is engaged in screwing, along the axis of the push-button 126 of the sensitive relay 122, in a threaded bore 135 provided for this purpose at the end, rounded accordingly, of the control arm 128.
  • the central wall 121 of the housing 120 has, level with this pin 140, and as shown diagrammatically in FIG. 2, a recess 142 elongated, for example in a buttonhole .
  • the transmission part 130 carries, in one piece, another arm 144, or resetting arm, intended to cooperate with a cam 145 secured to the engagement and trigger lever 37, to return to the initial position of the control arm 128, and thus automatic reset of the sensitive relay 122.
  • this reset arm 144 comes laterally from the support barrel 131 of the transmission part 130, substantially perpendicular to the axis of the latter.
  • control arm 1228 extends substantially level with the control arm 128, parallel to the action arm 129, and therefore substantially orthogonally to said control arm 128.
  • an elongated buttonhole window 146 is provided in the middle wall 121 of the housing 120, so that the reset arm 144 has access to the cam 145 carried by the engagement and trigger lever 37.
  • this cam 145 is a single facet formed obliquely on the corresponding face of the engagement and trigger lever 37, at the base thereof.
  • the action arms 129 and reset arms 144 have their rounded ends.
  • the barrel 131 of the part 130 pivots about its axis, along the arrow F2 in FIG. 2, and it follows that, by means of the pin 144 constituting the second constituent part of the transmission 123 according to the invention, the action arm 129 of the transmission part 130 of the latter in turn acts on the pallet 51.
  • the resetting arm 144 is found occupying the position shown in broken lines in FIG. 3.
  • the cam 145 forces the reset arm 144 to return to its initial position, which is that shown in solid lines in FIG. 3, which jointly ensures the return of the entire workpiece to its initial position.
  • transmission 130 and therefore, by action of the control arm 128 thereof, on the push-button 126 of the sensitive relay 122, the return to the reset position of this push-button 126.
  • the return means associated with the part 130 according to the invention advantageously belong to those already provided elsewhere in the circuit breaker, since they are those associated with the interlocking and tripping lever 37.
  • the screw constituting the adjustment member 134 allows, during assembly, to suitably adjust the position of the part 130 relative to the pusher 126 of the sensitive relay 122 and, by intermediate from counter 140, to pallet 51.
  • this adjustment member is constituted by the head of an eccentric 137 the body 138 of which is engaged in journalling, along an axis perpendicular to that of the push-button 126 of the sensitive relay 122, in a bore provided accordingly at the end of the control arm 128.
  • journal axis of this eccentric 137 is parallel to the pivot axis of the support barrel 131; as a variant, it may be jointly perpendicular thereto and perpendicular to the axis of the push-button 126 of the sensitive relay 122.
  • the head of the eccentric 137 thus constituting the adjusting member 134 has diametrically, on the surface, a groove.
  • the support barrel 131 of the transmission part 130 has axially, for its pivoting, a bore 150 by which it is engaged on a separate axis 152 carried by the housing 120. It can for example be forcibly engaged on such an axis 152, in which case the latter is mounted in journals on the housing 120; alternatively it can be engaged in journalling on this axis 152.
  • the reset arm 144 is assumed to have a certain rigidity.
  • this reset arm 144 is by itself elastically deformable.
  • the resetting arm 144 can be in one piece with the support barrel 131, with, possibly, a clearance at its root, to favor elasticity.
  • it carries, like the control arm 128, for cooperation with the cam 145, an adjustment member mounted adjustable in position, such as a screw or an eccentric for example.
  • the transmission part 130 carries yet another arm 155, or drive arm, which, like the control arm 128 and the action arm 129, comes laterally, in one piece, from its support barrel 131, substantially perpendicular to the axis thereof.
  • this drive arm 155 is substantially level with the action arm 129 in the embodiment shown.
  • this display arm 157 is rotatably mounted on the axis 152 on which is also also rotatably engaged the support barrel 131, at the corresponding end of said axis 152.
  • the display arm 157 which in practice extends immediately below the front wall 160 of the housing 120, carries a mark 161, for example a colored mark.
  • the display arm 157 is integral with a reset arm 162, which, like the action arm 129, is level, thanks to a recess 163, FIG. 10, with the pin 140 carried by the interlocking and tripping lever 37, and which, for cooperation with this pin 140, has an oblique ramp 164, FIG. 11.
  • the reference mark 161 which this display arm 157 carries is retracted, this is i.e. invisible from outside the housing 120.
  • this window 166 is equipped with a magnifying glass 167.
  • the passage of the display arm 157 from its latching position to its triggering position is effected by the lug 156 of the drive arm 155, during the pivoting of the transmission part 130 around the axis of its support barrel 131 on differential fault, said lug 156 extending in line with the current part of said display arm 157, at a distance from said axis.
  • the eccentric 137 carried by the arm control 128 has a journal axis perpendicular both to this control arm 128 and to the axis of the pusher 126 of the sensitive relay 122.
  • the display arm 157 which, as before, carries a reference 161, comes laterally, in one piece, from the support barrel 131 of the transmission part 130, substantially perpendicular to the axis of this support shaft 131, like the control arm 128 and the action arm 129.
  • the reset of the sensitive relay 122 is no longer automatic, and the transmission part 130 therefore no longer carries a reset arm 144.
  • this manual reset means 170 is constituted by a pusher, which, at the disposal of the user, is mounted to move against elastic return means in a slot 171 provided for this purpose in the front wall 160 of the housing 120, and which, below the latter, on its lower face, carries a lug 172 whose path interferes with one of the arms of the transmission part 130, and, in practice, with the display arm 157 then carried by the latter.
  • the display arm 157 carries an elastically deformable tongue 173, which extends parallel to its current part, being separated from the latter by a slot 174.
  • the elastic return means associated with the pusher constituting the manual resetting means 170 are constituted by an arm 176, or return arm, which is integral with this pusher 170, being in practice from its lug 172, and which, at one end, bears on a stud 177 secured to the housing 120.
  • the pusher thus constituting the manual reset means 170 associated with the transmission part 130 is mounted movable transversely with respect to the engagement and trigger lever 37, and, as shown diagrammatically in broken lines in FIG. 13, its path interferes with that of the latter this.
  • the reference 161 carried by the display arm 157 appears, in sight, in the window 166 of the front wall 160 of the housing 120.
  • this pusher indeed acts by its lug 172 on the elastically deformable tongue 173 of the display arm 157 carried by the transmission part 130.
  • the display arm 157 makes it possible to signal that a trip has taken place on a differential fault, or, in other words, to store this differential fault.
  • the axis of the push-button of the sensitive relay can, for example, no longer be parallel, but perpendicular, to the fixing plate of the circuit-breaker housing, the axis of the support barrel of the transmission part then being, for its part, against, parallel to said fixing base.
  • a test button can be provided, for checking the operation of the sensitive relay by sending a current pulse on the toroid driving it. this.
  • this circuit breaker can also have the neutral sectioning arrangements which are the subject of the document EP-A-0108022, and it is moreover essentially for a circuit breaker with neutral sectioning of this type that it is more particularly intended.
  • the present invention finds its application as well for a multipole circuit breaker as for a monopolar circuit breaker, its differential function finding as well to apply to a possible current between phases as to a possible current between phase and neutral.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
EP85400762A 1984-04-24 1985-04-17 Schalter mit Differentialfunktion Withdrawn EP0161968A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8406383A FR2563375B1 (fr) 1984-04-24 1984-04-24 Disjoncteur a fonction differentielle
FR8406383 1984-04-24

Publications (1)

Publication Number Publication Date
EP0161968A1 true EP0161968A1 (de) 1985-11-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85400762A Withdrawn EP0161968A1 (de) 1984-04-24 1985-04-17 Schalter mit Differentialfunktion

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EP (1) EP0161968A1 (de)
FR (1) FR2563375B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0259800A2 (de) * 1986-09-09 1988-03-16 Asea Brown Boveri Aktiengesellschaft Zweipoliger Leitungsschutzschalter
EP0299440A2 (de) * 1987-07-13 1989-01-18 Mitsubishi Denki Kabushiki Kaisha Apparat für einen elektrisch betätigten Schalter
EP0470215A1 (de) * 1990-02-23 1992-02-12 Square D Co Lastschalter.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825497A1 (de) * 1988-07-27 1990-02-01 Asea Brown Boveri Fehlerstromschutzschalter

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128274A3 (de) * 1971-03-02 1972-10-20 Feme Fabbrica Equipaggia
US3745414A (en) * 1972-01-21 1973-07-10 Westinghouse Electric Corp Ground fault circuit interrupter
US3855502A (en) * 1973-02-22 1974-12-17 Ite Imperial Corp Ground fault interrupter device
US3984736A (en) * 1975-02-04 1976-10-05 Thin Fay Rai Leakage protective device
US4037185A (en) * 1976-03-11 1977-07-19 General Electric Company Ground fault circuit breaker with trip indication
US4081852A (en) * 1974-10-03 1978-03-28 Westinghouse Electric Corporation Ground fault circuit breaker
EP0028958A1 (de) * 1979-10-26 1981-05-20 Legrand Schutzschalter, sein Auslösemechanismus
FR2486304A1 (fr) * 1979-03-01 1982-01-08 Ave Di Belli Andrea C Interrupteur magneto-thermique differentiel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128274A3 (de) * 1971-03-02 1972-10-20 Feme Fabbrica Equipaggia
US3745414A (en) * 1972-01-21 1973-07-10 Westinghouse Electric Corp Ground fault circuit interrupter
US3855502A (en) * 1973-02-22 1974-12-17 Ite Imperial Corp Ground fault interrupter device
US4081852A (en) * 1974-10-03 1978-03-28 Westinghouse Electric Corporation Ground fault circuit breaker
US3984736A (en) * 1975-02-04 1976-10-05 Thin Fay Rai Leakage protective device
US4037185A (en) * 1976-03-11 1977-07-19 General Electric Company Ground fault circuit breaker with trip indication
FR2486304A1 (fr) * 1979-03-01 1982-01-08 Ave Di Belli Andrea C Interrupteur magneto-thermique differentiel
EP0028958A1 (de) * 1979-10-26 1981-05-20 Legrand Schutzschalter, sein Auslösemechanismus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0259800A2 (de) * 1986-09-09 1988-03-16 Asea Brown Boveri Aktiengesellschaft Zweipoliger Leitungsschutzschalter
EP0259800A3 (en) * 1986-09-09 1988-09-28 Bbc Brown Boveri Aktiengesellschaft Bipolar automatic cutout
EP0299440A2 (de) * 1987-07-13 1989-01-18 Mitsubishi Denki Kabushiki Kaisha Apparat für einen elektrisch betätigten Schalter
EP0299440A3 (en) * 1987-07-13 1990-05-30 Mitsubishi Denki Kabushiki Kaisha Apparatus for electrically operating a circuit breaker
EP0470215A1 (de) * 1990-02-23 1992-02-12 Square D Co Lastschalter.
EP0470215A4 (en) * 1990-02-23 1993-05-05 Square D Company A circuit breaker

Also Published As

Publication number Publication date
FR2563375B1 (fr) 1988-05-20
FR2563375A1 (fr) 1985-10-25

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