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WO1997032329A1 - Commutateur electrique de protection - Google Patents

Commutateur electrique de protection Download PDF

Info

Publication number
WO1997032329A1
WO1997032329A1 PCT/AT1997/000037 AT9700037W WO9732329A1 WO 1997032329 A1 WO1997032329 A1 WO 1997032329A1 AT 9700037 W AT9700037 W AT 9700037W WO 9732329 A1 WO9732329 A1 WO 9732329A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit breaker
electrical circuit
pawl
breaker according
support
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.)
Ceased
Application number
PCT/AT1997/000037
Other languages
German (de)
English (en)
Inventor
Franz Reil
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.)
Felten and Guilleaume Austria AG
Original Assignee
Felten and Guilleaume Austria AG
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 Felten and Guilleaume Austria AG filed Critical Felten and Guilleaume Austria AG
Priority to AU17591/97A priority Critical patent/AU1759197A/en
Publication of WO1997032329A1 publication Critical patent/WO1997032329A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • 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
    • H01H71/1027—Interconnected mechanisms comprising a bidirectional connecting member actuated by the opening movement of one pole to trip a neighbour pole
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/524—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism the contact arm being pivoted on handle and mechanism spring acting between cradle and contact arm
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism

Definitions

  • the invention relates to a circuit breaker with a switching mechanism which has a pawl and a pawl support with a latching projection on which the pawl is supported and with a bimetal which actuates the pawl support.
  • circuit breakers e.g. Line circuit breakers
  • bimetal for thermal overload protection which operate a pawl support when a predetermined, adjustable temperature is exceeded, so that the circuit breaker is actuated and the line to be protected is interrupted.
  • adjusting screws are usually provided which act on the bimetal element or a holder for it. The position of the bimetal element in the circuit breaker can be changed by turning the adjusting screw, so that the temperature at which the bimetal element triggers the switch can also be set.
  • the object of the invention is to provide a circuit breaker of the type specified at the outset which, as far as the tripping by the bimetal is concerned, is as simple and compact as possible.
  • a release bracket is arranged on the latch support, which is assigned to the bimetal and that the position of the release bracket on the latch support is adjustable.
  • the invention provides a very simple and easy-to-assemble assembly, consisting of the latch support and the release bracket, which can be installed as a pre-assembled assembly in the circuit breaker.
  • this can be characterized in that the position of the release bracket on the latch support can be adjusted by means of an adjusting screw, and preferably that the release bracket is approximately U-shaped and that one leg of the release bracket on the clinch
  • REPLACEMENT LATCH (RULE 26) kenankzug rests, whereas the other leg is assigned to the bimetal.
  • This embodiment of the invention offers the advantage that the trigger bracket can be adjusted particularly easily and precisely.
  • FIG. 1 shows an embodiment of a switch according to the invention with the top shell removed, in the “manual” OFF position
  • FIG. 2 shows a section through the switch of FIG. 1 along the lines A-A,
  • FIG. 3 is a view of the switch of FIG. 1 in the ON position
  • FIG. 4 shows a view of the switch according to FIG. 1 at the moment of electromagnetic triggering
  • FIG. 5 is a view of the switch of FIG. 1 in the "electrical" OFF position
  • FIG. 6 shows a view of the switch according to FIG. 1 in the so-called “reset” position before it is switched on again.
  • FIG. 1 and 2 show an embodiment of a switch according to the invention, the housing of which, as usual, consists of a lower shell 1 and an upper shell 2 which are riveted or screwed together.
  • the switch has two terminals 23, 24, which are used to connect the line to be protected.
  • the terminal 23 is a
  • REPLACEMENT BLA ⁇ (RULE 26) is connected to a leg 28 of an approximately L-shaped yoke 6 of the electromagnetic release 27.
  • a folding anchor 7 is pivotally mounted on the other leg 29 of the yoke 6, a folding anchor 7 is pivotally mounted.
  • a bimetal 20 is attached, the free end 31 of which is electrically connected to a round cable 18.
  • This round cable 18 is subsequently electrically connected to a switching bridge 12, which is pivotally mounted at one end 32 on a switching button 3.
  • a contact area 33 of the switching bridge 12 lies in the ON position (FIG. 3) on a stationary contact 21 which is fastened to a contact carrier 11.
  • the essentially U-shaped contact carrier 11 is in turn connected at one end 34 to the terminal 24 and ends at its other end 34 'in a deionization chamber 10.
  • the switching mechanism of the switch according to the invention has an actuating button 3 which has pivot pins 35 on both sides, which are mounted in recesses in the upper shell 2 and the lower shell 1.
  • a handle 36 of the actuating button 3 leads out of the housing 1, 2 through a slot 37.
  • the actuating button 3 has approximately V-shaped projections 38 on both sides, which form a receptacle for the ends 32 of the switching bridge 12 which is divided in the form of a fork in this region.
  • the switching bridge 12 has an opening 39 approximately in its central region, into which a tension spring 15 is suspended at one end.
  • the other end of this tension spring 15 is suspended in an opening 40 in a pawl 8 which is guided through a slot 67 in the operating button 3.
  • the pawl 8 is approximately U-shaped and has an end 41 in approximately V-shaped recesses 42 in the lower shell 1 and the upper shell 2.
  • the other end 43 of the pawl 8 is supported in the ON position (FIG. 3) and in the “manual” OFF position of the switch (FIG. 1) on a support bolt 14 of a pawl support 4.
  • the term “manual” OFF position means that the switch has been switched off manually using the operating button 3.
  • the force vector of the tension spring 15 leads either to the left or to the right at the point of contact of the ends 32 of the switching bridge 12 past the actuation button 3 and thus pulls the switching bridge into the ON or OFF position.
  • the pawl support 4 can be mechanically coupled to an adjacent switch along the axis 44 in order to transmit the pivoting movement of a pawl support 4 to the adjacent switch.
  • rectangular recesses 66 are provided on both sides of the clinch support 4, into which rectangular connecting plates, also not shown, can be inserted. These connecting plates are inserted into the mutually facing recesses 66 of the pawl supports 4 of adjacent circuit breakers, so that the movement of a pawl support 4 is transmitted to the adjacent pawl support 4.
  • the connecting plates are inserted with so much play in the recesses 66 that a latch support 4 can be rotated to such an extent that the Pawl 8 can slide off the support bolt 14 without an adjacent pawl support 4 also being rotated.
  • the jack support 4 has an extension 45 below the support bolt 14, on which an extension 46 is arranged, which extends transversely to the main plane of the switch housing 1, 2. Via this extension 46, the electromagnetic release 27 can open the switch via its hinged armature 7, as will be described in the following.
  • the pawl support 4 is rotated clockwise by means of a support spring 16 designed as a torsion spring, which is supported on the one hand on the lower shell 1 and on the other hand on the pawl support 4.
  • a support spring 16 designed as a torsion spring
  • the pawl support 4 On the side facing away from the pawl 8, the pawl support 4 has a U-shaped release bracket 9, which rests with a leg 47 on the pawl support 4 and is fastened there, for example, by means of a bayonet catch.
  • the other leg 48 of the trigger bracket 9 extends into the region of the free end 31 of the bimetal 20 and is spaced from it in the "cold" state of the bimetal 20.
  • This distance can be adjusted by means of an adjusting screw 25, which passes through both legs 47, 48 of the release bracket 9, by screwing the adjusting screw 25, the longitudinal axis of which intersects the axis of rotation of the pawl support 4, into the pawl support 4 to different degrees.
  • it can be set in a very simple manner at which temperature of the bimetal 20 the pawl support 4 is rotated so far that the end 43 of the pawl 8 slides off the support bolt 14 and the switch is opened.
  • the second possibility of "electrical" triggering is provided by the electromagnetic release 27.
  • the hinged armature 7 of the electromagnet trigger 27 is of approximately T-shaped design, one leg 50 of the folding armature 7 projecting through the leg 29 of the yoke 6 and being pivotably mounted in this.
  • the second leg 49 of the crossbeam of the hinged armature 7 is arranged in the extension of a core 13 surrounded by the coil 19 and is abruptly attracted by this, for example in the event of a short circuit, against the force of an armature spring 17.
  • the armature spring 17 is formed in the illustrated embodiment as a torsion spring.
  • One leg 51 of the armature spring rests on the leg 49 of the hinged anchor 7 and rotates the hinged anchor 7 counterclockwise.
  • the other leg 52 of the armature spring 17 is inserted into one of a plurality of recesses 53 which are located laterally on the leg 28 of the yoke 6 which is arranged horizontally in the drawings.
  • the retaining force that is applied by the armature spring 17 against the electromagnetic tensile force of the core 13 on the hinged armature 7 can be adjusted in a very simple manner by inserting the leg 52 of the armature spring 17 into a selected recess 53.
  • the retaining force of the armature spring 17 is smaller in the position shown in FIG. 1 than if it were inserted in the central recess 53, and greatest when it is inserted in the right recess 53.
  • the armature spring 17 is plugged with its winding 54 onto an extension 55 on the vertical leg 29 of the yoke 6.
  • the main advantage of this arrangement is that the complete assembly consisting of solenoid release 27, yoke 6, hinged armature 7, armature spring 17 and bimetal 20 can be assembled and adjusted outside the switch und .. and thus used as a complete, pre-set assembly in the switch can be.
  • the current flows via the coil 19, the yoke leg 28, the bimetal 20 and the round cable 18 to the switching bridge 12 and further to the contact carrier 11.
  • the current flows from the coil 19 via the yoke leg 29 of the yoke 6 and the arc to the contact carrier 11.
  • the bimetal 20 is not further burdened by the short-circuit current.
  • the bimetallic resistor which has a favorable effect on the current damping, is replaced by the resistance of the yoke 6 or its yoke leg 29.
  • the yoke leg 29 is connected to the yoke 6 so that the arc, viewed in the direction of current flow, commutates to the connection point.
  • the actuation of the pawl support 4 by the hinged armature 7 takes place in that the hinged armature 7 comes to rest with its web 56 on the shoulder 46 of the latch support 4 when it is pivoted clockwise by the magnetic field of the core 13 of the electromagnetic release 27, and in further follow the pawl support 4 pivoted until the pawl 8 slides off the support pin 14.
  • the pawl 8 pivots clockwise from its position shown in FIG. 3 about its bearing point 41, 42.
  • the opening 40 in the pawl 8, in which the tension spring 15 is suspended moves clockwise to the right until the force vector of the tension spring 15 on the right at the point of contact of the switching bridge 12 leads past the projections 38 on the actuating button 3, as a result of which the switching bridge 12 is pulled to the right into the position shown in FIG. 1 until it abuts a rib 57 of the lower shell 1.
  • the arc travels downward on the switching bridge horn 33, commutates on the yoke leg 29 and is extinguished in the deionization chamber 10.
  • the pawl 8 has a pawl extension 60 which lifts the switching bridge 12 from the contact 21, while the pawl 8 pivots to the right.
  • the switch behavior of the switch cannot be improved to a very great extent by the pawl extension 60, but the pawl extension 60 supports the breaking open of any light contact welds that may be present.
  • a significant improvement in the release movement of the pawl 8 can, however, be achieved by a pull tab 5 which has a bore 61 at one end and an elongated hole 62 at the other end. With its bore 61, the pull tab 5 is on one Approach 63 plugged on, which is located approximately in the middle of the switching bridge 12 laterally on this.
  • the web 56 of the hinged anchor 7 engages with an extension 64 in the elongated hole 62.
  • the hinged armature 7 is pivoted clockwise and assumes the position shown in FIG. 4.
  • the pawl support 7 first pivots the pawl support 4 counterclockwise, as a result of which the pawl 8 is released.
  • the hinged armature 7 with its extension 64 which then rests on the right end of the elongated hole 62 of the pull tab 5, pulls the switching bridge 12 to the right and away from the stationary contact 21, even before a significant opening force is exerted by the tension spring 15 on the switching bridge 12 is exercised.
  • the contact opening speed of the circuit breaker according to the invention can thereby be considerably improved.
  • the switching bridge 12 After the switching bridge 12 has been moved into the position shown in FIG. 4 by the pull tab 5, the switching bridge 12 is pulled to the right by the pawl 8 pivoted to the right until it has reached the position shown in FIG. 5.
  • the actuation button 3 is turned clockwise.
  • the actuating button 3 presses the pawl 8 with an extension 65, which comes into contact with the pawl 8 in a manner not shown, counterclockwise to the left until the position shown in FIG. 6 is reached, the end 43 of the pawl 8 is pivoted over the support pin 14 and can rest on the support pin 14 when the actuating button 3 is released. If the actuating button 3 is subsequently pivoted counterclockwise into the ON position shown in FIG. 3, the switching bridge 12 is simultaneously pivoted until it abuts the contact 21. The contact between the contact 21 and the switching bridge 12 closes very suddenly and quickly, as a result of which the switch-on erosion and the probability of contact welding is very low.

Landscapes

  • Breakers (AREA)

Abstract

Commutateur électrique de protection présentant un mécanisme de commutation comportant un cliquet (8) et un support (4) muni d'une saillie de crantage (14) sur laquelle le cliquet (8) vient prendre appui. Le commutateur présente en outre un bimétal (20) actionnant le support de cliquet (4). Sur ce support (4) est monté un étrier de déclenchement (9) associé au bimétal (20), la position de l'étrier (9) étant réglable sur le support de cliquet (4). On obtient de cette façon un ensemble composé du support de cliquet (4) et de l'étrier (9), d'une construction simple et d'un montage facile, pouvant être inséré dans le commutateur de protection de la ligne, sous la forme d'un ensemble préalablement monté.
PCT/AT1997/000037 1996-02-26 1997-02-26 Commutateur electrique de protection Ceased WO1997032329A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU17591/97A AU1759197A (en) 1996-02-26 1997-02-26 Electrical safety switch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0035096A AT404647B (de) 1996-02-26 1996-02-26 Elektrischer schutzschalter
ATA350/96 1996-02-26

Publications (1)

Publication Number Publication Date
WO1997032329A1 true WO1997032329A1 (fr) 1997-09-04

Family

ID=3488288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1997/000037 Ceased WO1997032329A1 (fr) 1996-02-26 1997-02-26 Commutateur electrique de protection

Country Status (3)

Country Link
AT (1) AT404647B (fr)
AU (1) AU1759197A (fr)
WO (1) WO1997032329A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU505815B1 (de) * 2023-12-18 2025-06-19 Phoenix Contact Gmbh & Co Magnetauslöser für Schutzschalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011080680A1 (de) * 2011-08-09 2013-02-14 Siemens Aktiengesellschaft Ankerfeder für ein Magnetsystem eines Leitungsschutzschalters sowie Leitungsschutzschalter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050285A (en) * 1933-10-31 1936-08-11 Westinghouse Electric & Mfg Co Circuit interrupter
GB634701A (en) * 1947-02-19 1950-03-29 Crabtree & Co Ltd J A Improvements in automatic electric circuit breakers having thermal overload release units
DE1131785B (de) * 1960-08-09 1962-06-20 Licentia Gmbh Thermischer Ausloeser fuer elektrische Schaltgeraete
US3593234A (en) * 1970-02-09 1971-07-13 Cutler Hammer Inc Trip adjustment means for instantaneous trip circuit breaker
US4030060A (en) * 1976-02-26 1977-06-14 Westinghouse Electric Corporation Thermally adjustable circuit breaker
US5089797A (en) * 1990-11-14 1992-02-18 Westinghouse Electric Corp. Circuit breaker with dual function electromagnetic tripping mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660794B1 (fr) * 1990-04-09 1996-07-26 Merlin Gerin Mecanisme de commande d'un disjoncteur electrique.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050285A (en) * 1933-10-31 1936-08-11 Westinghouse Electric & Mfg Co Circuit interrupter
GB634701A (en) * 1947-02-19 1950-03-29 Crabtree & Co Ltd J A Improvements in automatic electric circuit breakers having thermal overload release units
DE1131785B (de) * 1960-08-09 1962-06-20 Licentia Gmbh Thermischer Ausloeser fuer elektrische Schaltgeraete
US3593234A (en) * 1970-02-09 1971-07-13 Cutler Hammer Inc Trip adjustment means for instantaneous trip circuit breaker
US4030060A (en) * 1976-02-26 1977-06-14 Westinghouse Electric Corporation Thermally adjustable circuit breaker
US5089797A (en) * 1990-11-14 1992-02-18 Westinghouse Electric Corp. Circuit breaker with dual function electromagnetic tripping mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU505815B1 (de) * 2023-12-18 2025-06-19 Phoenix Contact Gmbh & Co Magnetauslöser für Schutzschalter

Also Published As

Publication number Publication date
AU1759197A (en) 1997-09-16
AT404647B (de) 1999-01-25
ATA35096A (de) 1998-05-15

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