EP0491250A2 - Appareillage d'installation - Google Patents

Appareillage d'installation Download PDF

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Publication number
EP0491250A2
EP0491250A2 EP91120957A EP91120957A EP0491250A2 EP 0491250 A2 EP0491250 A2 EP 0491250A2 EP 91120957 A EP91120957 A EP 91120957A EP 91120957 A EP91120957 A EP 91120957A EP 0491250 A2 EP0491250 A2 EP 0491250A2
Authority
EP
European Patent Office
Prior art keywords
lever
point
release
overcurrent
switch
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Withdrawn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
EP91120957A
Other languages
German (de)
English (en)
Other versions
EP0491250A3 (en
Inventor
Rolf Goehle
Volker Schmitt
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0491250A2 publication Critical patent/EP0491250A2/fr
Publication of EP0491250A3 publication Critical patent/EP0491250A3/de
Withdrawn legal-status Critical Current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
    • H01H71/74—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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H2071/7454—Adjusting only the electrothermal mechanism with adjustable axis of transmission lever between bimetal element and trip lever
    • 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
    • H01H71/1072—Release mechanisms which are reset by opening movement of contacts
    • 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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature

Definitions

  • the invention relates to an installation device according to the preamble of claim 1.
  • thermobimetal is adjusted in the area of its clamping point using an adjusting screw that is actuated from the outside. Subsequent adjustment of the thermobimetal is only possible if the thermobimetal is operating under operating conditions, i.e. if the thermobimetal has current flowing through it. A subsequent, targeted and desired setting of a bimetal to a certain tripping current is not possible with the known circuit breakers.
  • Adjustment is possible, for example, in the case of thermal overcurrent relays, where there is a setting button with which the thermal overcurrent relay can be set to different tripping values and tripping times.
  • the object of the invention is to provide an installation switching device of the type mentioned, in which means are provided which allow subsequent adjustment to certain, predetermined tripping values without the thermobimetal having to have current flowing through it.
  • a rotary lever which can be rotated about a pivot point is thus provided, which pivot point is adjustable. This allows the distance between the thermal overcurrent release and the rotary lever to be adjusted, which means that the switching device can be set to different trip values. If the overcurrent release is a thermal bimetal, then the adjustment of the pivot point of the rotary lever changes the distance between the bendable end of thermal bimetal and the point of application of the thermal bimetal on the rotary lever, whereby the trigger values are changed.
  • the transmission mechanism with which the movement of the overcurrent release is transmitted to the switch lock of the installation device for opening the contact point is equipped with a latching point, so that in the event of a triggering process, the latching point of the transmission mechanism is first released and, after this latching point has been resolved, the so-called main latching point in the switch lock of the installation device, for. B. a circuit breaker is released.
  • the adjustment is carried out from the outside by means of a rotary knob which can adjust an adjusting element or an adjusting slide in a corresponding manner so that the distance between the rotary lever and the thermobimetal is changed.
  • a reset lever is provided, which is reset by a slide actuated by the contact lever of the installation device when the installation device is switched off.
  • the transmission mechanism is particularly advantageously suitable for temperature compensation insofar as the fulcrum stop is attached to one end of a compensation bimetal.
  • circuit breaker is one for short-circuit tripping and overcurrent tripping, which can also be switched on and off manually.
  • Figure 1 shows some parts of such a circuit breaker. Shown are a contact lever 11 movable about a fulcrum 10, on which a movable contact piece 12 is attached, which forms a contact point with a fixed contact piece 13.
  • the fixed contact piece 13 is attached to an arc guide rail 14, to which an arc quenching plate packet 15 is arranged in parallel.
  • the arc guide rail is connected via a contact piece carrier 16 to one of the coils 17 of a magnet system 18.
  • the magnet system 18 has an impact armature 19, with which the contact lever 11 on the one hand and a trigger element (not shown in more detail) on the opposite side (on the right in the drawing) is actuated.
  • the switching device is assigned a switching lock 20 which has a pawl lever 22 which is rotatably mounted about an axis 21 and which interacts with a lug 23 with a release lever 24 which is rotatably mounted about an axis of rotation 25.
  • FIG. 1 shows that the nose 23 rests on a surface 26 of the release lever 24, so that the nose 23 and the surface 26 form a latching point 27 of the key switch 20, which is also referred to as the main latching point. Other components of the key switch are not shown.
  • a trigger slide 28 is provided, which is displaced in the direction of arrow A by a trigger lever (not shown) associated with the magnet armature 19, so that the trigger slide 28 takes the trigger lever 24 counterclockwise and thus the latching point 27 for actuating the movable Contact lever 11 unlatched.
  • the two figures show a transmission mechanism 30 which has a circuit board 31 fixed to the housing on which a release lever 32 is rotatably mounted by means of an axis 33.
  • the trigger lever 32 has two arms 34 and 35 arranged approximately at right angles to one another, of which the arm 35 interacts with the trigger slide 28.
  • a ratchet lever 37 is articulated in a fixed position on the circuit board 31 via an axis of rotation 36 and is continuously acted counterclockwise by means of a spring (not shown).
  • the pawl lever 37 is provided with a nose-shaped stop 38, also called a nose. In the position shown in FIG. 1, the arm 34 engages behind the lug 38 and forms a latching point 39 with it.
  • the transmission mechanism includes a double-arm lever 40 which, via an axis of rotation 41, bears practically against a fixed stop 42 shown in broken lines.
  • the first arm 43 of the double arm lever 40 abuts a pivot point stop 45 with a pin 44 extending transversely thereto, and the second arm 46 of the double arm lever 40 also has a pin 47 with which it interacts with a thermal bimetal 48 which forms the thermal trigger of the switch (see further down).
  • An adjusting slide 50 is slidably formed on the circuit board 31, to which the fulcrum stop 45 is fastened via a U-shaped extension 51.
  • the adjusting slide 50 can be actuated by an adjusting wheel 52 guided in the housing, on which an extension 54 provided with a spiral cam 53 is formed. If the adjusting wheel 52 is rotated (namely about its central axis M), then the adjusting slide is adjusted in the double arrow direction V, whereby the double arm lever 40 is pivoted about its axis 41 in the clockwise direction. This changes the distance D between the pin 47 and the bimetallic 48; if it is increased, the tripping current is set higher; If the distance is reduced, a low tripping current is obtained.
  • the mode of operation of the switching device is now such that when the thermobimetal bends in the clockwise direction, according to the direction of arrow B, the double-arm lever is rotated counterclockwise in the direction of arrow C about the pivot point stop 45; thereby the double arm lever with an approximately located in its central area 55 against the pawl lever 37 and pivots this in the clockwise direction C1, whereby the second arm 34 of the release lever 32 is released, the counterclockwise due to a spring not shown in the direction of arrow C. the axis 33 is pivoted.
  • the second arm 35 acts on the release slide 28, which unlatches the latching point 27, as a result of which the movable contact lever 11 and the movable contact piece 12 are pivoted in the switching-off direction.
  • an elongated hole 56 is made, which lies on a circular arc, the center of which is the central axis of the axis of rotation 33.
  • the first arm 34 of the release lever 32 has a recess 57 which is covered by a leg of a transmission bracket 58, not shown, which runs perpendicular to the plane of the drawing, which leg engages in the slot 56 and is guided therein.
  • the transmission bracket 58 also has at its other end a leg bent at right angles in the direction of the plane of the drawing, which engages in a slot 59 which is oriented approximately perpendicular to the direction of displacement V of the adjusting slide 50.
  • the slot 59 could also be oriented at an angle to this direction.
  • An actuating surface 60 interacts with the bent leg, which has or takes up an angle of approximately 45 ° to align the slot 59 and which is formed on a reset slide 61 which is slidably attached to the web 62 of the yoke running parallel to the arc guide rail 14 .
  • the slide 61 has an anvil 63 which interacts with a stop surface 64 on the movable contact lever.
  • the thermal bimetal 48 now swings out in the direction of arrow B, then the thermal bimetal pivots the double arm lever 40 in the direction of the arrow C 1 and releases the latching point of the parts 37 and 32, ie the latch lever 37 is rotated in the direction of the arrow C 1; as a result, the trigger lever 32 is pivoted in the direction of arrow C. Since the inclined surface is outside the range of movement of the lower leg of the transmission bracket 58 located in the slot 59, the transmission arm can be moved upward in the arrow direction U by the second arm 34 until the upper leg at the upper end of the elongated hole 56 and the lower leg is in the area of the bottom of the slot 59.
  • the main latching point 27 is opened by the movement of the slide 28 in the direction of arrow A.
  • the transfer bracket 58 pivots the release lever 32 into the position shown in FIG. 2, where the free end of the arm 34 comes behind the nose 38 on the latch lever 37, so that the latching point is closed and the transmission mechanism is brought into the ready-to-release position.
  • the U-shaped extension 51 is designed as a compensation bimetal, so that the position of the fulcrum stop 45 is correspondingly dependent on the outside temperature.
  • This embodiment is not shown in Figures 1 and 2; the U-shaped bimetal will have a U-shape, the legs of which run perpendicular to the plane of the drawing sheet, so that a sufficient size of the compensation bimetal is ensured.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
EP19910120957 1990-12-17 1991-12-06 Installation apparatus Withdrawn EP0491250A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904040263 DE4040263A1 (de) 1990-12-17 1990-12-17 Installationsgeraet
DE4040263 1990-12-17

Publications (2)

Publication Number Publication Date
EP0491250A2 true EP0491250A2 (fr) 1992-06-24
EP0491250A3 EP0491250A3 (en) 1993-03-31

Family

ID=6420517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910120957 Withdrawn EP0491250A3 (en) 1990-12-17 1991-12-06 Installation apparatus

Country Status (2)

Country Link
EP (1) EP0491250A3 (fr)
DE (1) DE4040263A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1126488A2 (fr) * 2000-02-16 2001-08-22 ABBPATENT GmbH Interrupteur sélectif en particulier un interrupteur de protection de ligne principale
CN101685729B (zh) * 2008-09-26 2012-02-08 浙江正泰电器股份有限公司 一种开关设备的自由脱扣机构
EP2743947A1 (fr) * 2012-12-14 2014-06-18 Schneider Electric Industries SAS Arbre de support des contacts mobiles dans un appareil de coupure du courant électrique, et appareil de coupure de courant le comportant, en particulier un disjoncteur de branchement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB426281A (en) * 1933-12-07 1935-04-01 John Ashworth Crabtree Improvements in, or relating to, automatic circuit-breakers
FR1469460A (fr) * 1964-10-30 1967-02-17 App Thermoflex Etablissements Disjoncteur thermique
FR2581243A1 (fr) * 1985-04-27 1986-10-31 Licentia Gmbh Interrupteur automatique comportant des organes de declenchement, magnetique et thermique
US4704593A (en) * 1985-10-16 1987-11-03 Westinghouse Electric Corp. Circuit breaker with adjustable thermal mechanism
EP0400414A2 (fr) * 1989-05-27 1990-12-05 Licentia Patent-Verwaltungs-GmbH Disjoncteur automatique, particulièrement disjoncteur de protection de ligne

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3342469A1 (de) * 1983-11-24 1985-06-05 Bbc Brown Boveri & Cie Elektrischer schalter
DE3533431A1 (de) * 1984-03-21 1987-03-26 Kopp Gmbh & Co Kg Heinrich Zaehlervorautomat
US4641001A (en) * 1984-06-15 1987-02-03 Mitsubishi Denki Kabushiki Kaisha Circuit interrupter
FR2585180A1 (fr) * 1985-07-19 1987-01-23 Telemecanique Electrique Dispositif de reglage du courant thermique d'un organe de declenchement thermique a bilame et appareil interrupteur de protection comportant un tel dispositif
US4698606A (en) * 1986-06-20 1987-10-06 Westinghouse Electric Corp. Circuit breaker with adjustable thermal trip unit
DE3812934A1 (de) * 1988-04-19 1989-11-02 Sursum Elektrizitaetsgesellsch Mehrphasiger schutzschalter
DE3840064A1 (de) * 1988-11-28 1990-05-31 Kloeckner Moeller Elektrizit Thermisches relais mit schaltwippe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB426281A (en) * 1933-12-07 1935-04-01 John Ashworth Crabtree Improvements in, or relating to, automatic circuit-breakers
FR1469460A (fr) * 1964-10-30 1967-02-17 App Thermoflex Etablissements Disjoncteur thermique
FR2581243A1 (fr) * 1985-04-27 1986-10-31 Licentia Gmbh Interrupteur automatique comportant des organes de declenchement, magnetique et thermique
US4704593A (en) * 1985-10-16 1987-11-03 Westinghouse Electric Corp. Circuit breaker with adjustable thermal mechanism
EP0400414A2 (fr) * 1989-05-27 1990-12-05 Licentia Patent-Verwaltungs-GmbH Disjoncteur automatique, particulièrement disjoncteur de protection de ligne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1126488A2 (fr) * 2000-02-16 2001-08-22 ABBPATENT GmbH Interrupteur sélectif en particulier un interrupteur de protection de ligne principale
EP1126488A3 (fr) * 2000-02-16 2003-07-30 ABB PATENT GmbH Interrupteur sélectif en particulier un interrupteur de protection de ligne principale
CN101685729B (zh) * 2008-09-26 2012-02-08 浙江正泰电器股份有限公司 一种开关设备的自由脱扣机构
EP2743947A1 (fr) * 2012-12-14 2014-06-18 Schneider Electric Industries SAS Arbre de support des contacts mobiles dans un appareil de coupure du courant électrique, et appareil de coupure de courant le comportant, en particulier un disjoncteur de branchement
FR2999793A1 (fr) * 2012-12-14 2014-06-20 Schneider Electric Ind Sas Arbre de support des contacts mobiles dans un appareil de coupure du courant electrique, et appareil de coupure de courant le comportant, en particulier un disjoncteur de branchement.

Also Published As

Publication number Publication date
EP0491250A3 (en) 1993-03-31
DE4040263A1 (de) 1992-06-25

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