EP0148112B1 - Schalter mit einem selektiv arbeitenden Auslöser - Google Patents

Schalter mit einem selektiv arbeitenden Auslöser Download PDF

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Publication number
EP0148112B1
EP0148112B1 EP84730133A EP84730133A EP0148112B1 EP 0148112 B1 EP0148112 B1 EP 0148112B1 EP 84730133 A EP84730133 A EP 84730133A EP 84730133 A EP84730133 A EP 84730133A EP 0148112 B1 EP0148112 B1 EP 0148112B1
Authority
EP
European Patent Office
Prior art keywords
switch
striker
stop
lever
impact
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
Application number
EP84730133A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0148112A1 (de
Inventor
Bernhard Preuss
Karl-Heinz Manthe
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0148112A1 publication Critical patent/EP0148112A1/de
Application granted granted Critical
Publication of EP0148112B1 publication Critical patent/EP0148112B1/de
Expired 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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch 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
    • H01H71/12—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
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to a switch with a selectively operating trigger with an impact arm, which is actuated by an electromagnet at a current corresponding to the triggering current of the switch and thereby acts on a switch lock of the switch, and with a pivotable lever arrangement which has a first and a second stop for the impact anchor and encompasses it in such a way that the lever arrangement can be pivoted out of a rest position into a position by the impact anchor via the first stop, in which the second stop enables the impact anchor to act on the switching mechanism.
  • an impact armature is displaceably arranged under the action of a spring in the interior of a coil of an electromagnet.
  • the known trigger further includes a lever arrangement which is pivotally mounted about an axis and consists of a two-armed, L-shaped lever and a further one-armed lever which is pivotably mounted on the L-shaped lever.
  • the two levers each form a stop for the impact anchor. In the rest position of the lever arrangement, the one-armed lever is outside the range of movement of the impact anchor.
  • the impact anchor strikes the first stop (L-shaped lever) of the lever arrangement and moves it into a position in which the second stop (armed lever) comes into the range of motion of the impact anchor. If a second trigger current pulse occurs before the lever arrangement swings back into its rest position, the impact armature is pulled back into the coil and thereby strikes against the one-armed lever. This folds down due to the action of the impact anchor and actuates a switch lock of the current-limiting switch via an additional lever.
  • the invention has for its object to provide a switch with a selectively operating trigger, which has the smallest possible number of moving parts and therefore works particularly reliably.
  • the lever arrangement according to the invention has a single lever, which is in the rest position with its second stop between the impact anchor and the release device and in the pivoted position, the second stop outside of Holds the range of motion of the impact anchor in a position in which the impact anchor can act directly on the switch lock.
  • An advantage of the switch according to the invention with the selectively operating trigger is that the lever arrangement has a single lever and is therefore of particularly simple construction. This is due to the fact that the lever arrangement blocks the movement of the impact anchor in its rest position before it can act on the release device and in its pivoted position removes this blocking. Because of the simple construction of the trigger, the switch according to the invention also works particularly reliably. A reliable triggering of the switch is also ensured by the fact that the impact anchor acts directly on the switching lock in the event of a triggering current. In addition, the switch according to the invention has the advantage because of its simple construction that it can be produced with comparatively little effort.
  • the lever is angled approximately U-shaped and has legs of different lengths, the longer leg being pivoted at one end about an axis and forming the first stop; the shorter leg of the lever represents the second stop.
  • the impact anchor can preferably be designed in the form of a rotating arm, the free end of which is arranged so as to cooperate with the stops of the lever arrangement.
  • the arm-shaped design of the impact anchor gives it elasticity, so that damage to the impact anchor and its bearing are avoided when the impact anchor hits the stops of the lever arrangement.
  • the electromagnet contains a busbar to which an iron yoke is attached.
  • This embodiment of the switch according to the invention is particularly suitable for switches for limiting high short-circuit currents which already generate a magnetic field which is sufficiently strong to actuate the impact armature in one current turn.
  • the busbar can be designed both in a straight line and in the form of a U-shaped curved current loop, so that a compact construction of the device according to the invention is advantageously achieved.
  • the iron yoke is horseshoe-shaped and is arranged on the busbar in such a way that the end faces of its two legs lie opposite the plane of motion of the impact anchor.
  • a particularly strong magnetic field is formed at currents in the order of magnitude of the tripping current on the end faces of the two legs of the iron yoke, so that in the sense of a safe actuation of the impact anchor has a great attraction.
  • the impact anchor is essentially cylindrical; the electromagnet contains a coil, in the interior of which the striking armature is displaceably mounted along the coil axis between the stops of the lever.
  • This embodiment is particularly suitable for use in systems in which short-circuit currents do not assume excessive values; due to the execution of the winding as a coil, a sufficiently strong magnetic field for actuating the impact armature is generated in the event of a short circuit from the triggering current. Due to the displaceable arrangement of the impact anchor in the interior of the coil, a particularly compact structure of the switch according to the invention can be achieved.
  • the switch shown in Figures 1 and 2 with a selectively operating trigger has an electromagnet with a loop-shaped busbar 2, which encloses a horseshoe-shaped iron yoke 3 such that its two legs 4 and 5 receive a leg 2 'of the busbar 2 between them.
  • the trigger of the switch further contains an impact armature 6, which is designed in the form of a rotating arm and is mounted in a housing part 7 of the switch so as to be pivotable about an axis of rotation 8.
  • the impact anchor 6 is oriented such that it can be pivoted towards or away from the end faces 9 and 10 of the two legs 4 and 5 of the iron yoke 3.
  • a slightly prestressed torsion spring 11 engages on the impact armature 6 and is supported on a pin 12 which penetrates the housing part 7 transversely.
  • the torsion spring 11 exerts a torque on the impact anchor 6, which acts in the direction of a rotational movement of the impact anchor 6 away from the iron yoke 3.
  • the striking anchor 6 has two striking surfaces 14 and 15 facing away from one another at its multiple angled free end 13. In the rest position, the striking anchor 6 leans with its striking surface 15 against a lever arrangement 16. This consists of a single, approximately U-shaped angled lever which, with regard to its U-shaped configuration, has two legs 17a and 17b of different lengths.
  • the longer leg 17a is pivotally mounted at one end 18 in the housing part 7 about an axis 19 in the plane of movement of the impact anchor 6 and forms a first stop 20a for the impact surface 15 of the impact anchor 6.
  • the shorter leg 17b of the lever arrangement 16 provides a second stop 20b for the striking surface 14 of the striking anchor 6.
  • a further torsion spring 21 which is somewhat more preloaded than the torsion spring 11, engages on the lever arrangement 16 and is supported on a bolt 22 which penetrates the housing part 7 transversely.
  • the further torsion spring 21 exerts a torque on the lever arrangement 16, which acts in the sense of a movement of the lever arrangement 16 with its second stop 20b against the impact anchor 6.
  • the lever arrangement 16 is pressed in its rest position with an extension 17c of the leg 17a against a stop device formed by the bolt 22. In this position, the lever arrangement 16 comprises the impact anchor 6 in such a way that its free end 13 with the impact surfaces 14 and 15 lies between the stops 20a and 20b of the lever arrangement 16.
  • the switch further includes a switch lock 23 with an actuator 24, which is arranged in the path of movement of the striker 6, the second stop 20b of the lever arrangement 16 being between the actuator 24 and the striking surface 14 ′ of the striker 6.
  • the switching lock 23 causes the opening of a contact system 25 of the switch, which is indicated in the drawing and which is arranged in the course of the busbar 2.
  • the magnetic field breaks down and thus its action of force on the impact armature 6. This vibrates due to the inertia of the torsion spring 11 due to its inertia back beyond its rest position.
  • the striking anchor 6 strikes with its striking surface 15 against the first stop 20a of the lever arrangement 16 and moves it against the spring force of the torsion spring 21 from its rest position into a further position, which is shown in broken lines in FIG.
  • the second stop 20b is in this position the lever arrangement 16 outside the range of movement of the impact anchor 6 with its impact surface 14.
  • the impact armature 6 is attracted again as a result of the next short-circuit current pulse by the magnetic field emanating from the iron yoke 3.
  • the torsion springs 11 and 21 are designed with regard to the minimum short-circuit current required to trigger the switch such that the magnetic field of the short-circuit current accelerates the striking armature 6 faster than the restoring force of the torsion spring 21, the lever arrangement 16. Therefore, the striking armature 6 moves relatively the lever arrangement 16 below it towards the iron yoke 3 and strikes with its striking surface 14 on the actuating element 24 of the switching mechanism 23.
  • the exemplary embodiment shown in FIG. 3 of a trigger of the switch according to the invention has an electromagnet 100 with a coil 101, which is applied to a coil body 102 and is surrounded by an iron yoke 103.
  • An essentially cylindrical impact armature 104 is held in the interior of the coil former 102 and consists of a central part 105 which has an extension 106 and 107 on each of its two end faces.
  • the extensions 106 and 107 each protrude from the iron yoke 103 through a bore 108 and 109, respectively.
  • the free ends of the extensions 106 and 107 each form a striking surface 110 or 111 of the striking anchor 104.
  • the striking anchor 104 is displaceably mounted along the coil axis by means of a first compression spring 112 and in the region of the extension 107 by means of a further compression spring 113 .
  • the trigger also has a lever arrangement 114. Like the lever arrangement of the exemplary embodiment according to FIGS. 1 and 2, this consists of a single approximately U-shaped angled lever with two legs 115 a and 115 b of different lengths, of which the longer leg 115 a has a first stop 116 a for the impact anchor 104 with its striking face 110 forms and the shorter leg 115b represents a second stop 116b for the impact anchor 104 with its face 111.
  • the longer leg 115a of the lever arrangement 114 is pivotally mounted at one end 117 about an axis 119 held on a housing part 118 in the plane of movement of the impact anchor 104.
  • a torsion spring 120 acting on the lever 114 presses it in its rest position against a stop device formed by a bolt 121 penetrating the housing part 118. In this rest position, shown with solid lines, the lever arrangement 114 engages around the impact anchor 104 in such a way that its impact surfaces 110 and 111 lie between the stops 116a and 116b of the lever arrangement 114.
  • a switch lock 122 with an actuating element 123 is further arranged, with the second stop 116b between the actuating element 123 of the key switch 122 and the striking surface 111 of the impact armature 104 in the rest position of the lever arrangement 114.
  • the impact armature 104 In the event of a first short-circuit current pulse, the impact armature 104 is drawn into the interior of the coil 101 in the direction of the switching mechanism 122. However, before the striking anchor 104 reaches the actuating member 123 of the key switch 122, it strikes with its striking surface 111 against the second stop 116b of the lever arrangement 114, so that its movement is blocked. After the end of the first short-circuit current pulse, the impact armature 104 swings back in the direction of its rest position accelerated by the second compression spring 113.
  • the striking anchor 104 moves beyond its rest position, with its striking surface 110 striking the first stop 116a of the lever 114 and pivoting it against the spring force of the torsion spring 120 into the position shown in broken lines.
  • the second stop 116b of the lever 114 is outside the range of motion of the impact armature 104. If there is no further short-circuit current pulse, the impact armature 104 and the lever arrangement 114 move into their rest positions, driven by the first compression spring 112 and the torsion spring 120, respectively back.
  • the impact armature 104 is pulled back into the interior of the coil 103.
  • the impact armature 104 is accelerated faster by the magnetic field of the coil 103 than the lever arrangement 114 by the restoring force of the Torsion spring 120.
  • the striking armature 104 moves with its striking surface 111 past the second stop 116b of the lever 114 against the actuating element 123 of the switch lock 122, which causes the contact system (not shown) to open under the force of the striking armature 104.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP84730133A 1983-12-22 1984-12-04 Schalter mit einem selektiv arbeitenden Auslöser Expired EP0148112B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3347121 1983-12-22
DE19833347121 DE3347121A1 (de) 1983-12-22 1983-12-22 Schalter mit einem selektiv arbeitenden ausloeser

Publications (2)

Publication Number Publication Date
EP0148112A1 EP0148112A1 (de) 1985-07-10
EP0148112B1 true EP0148112B1 (de) 1987-03-18

Family

ID=6218181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84730133A Expired EP0148112B1 (de) 1983-12-22 1984-12-04 Schalter mit einem selektiv arbeitenden Auslöser

Country Status (4)

Country Link
US (1) US4599590A (enrdf_load_stackoverflow)
EP (1) EP0148112B1 (enrdf_load_stackoverflow)
JP (1) JPS60157130A (enrdf_load_stackoverflow)
DE (2) DE3347121A1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672036A5 (enrdf_load_stackoverflow) * 1986-12-23 1989-10-13 Sprecher & Schuh Ag
US4876521A (en) * 1987-08-25 1989-10-24 Siemens Energy & Automation, Inc. Tripping coil with flux shifting coil and booster coil
US4801910A (en) * 1988-02-10 1989-01-31 Siemens Energy And Automation, Inc. Magnetic actuating mechanism
JP2954936B1 (ja) * 1998-08-14 1999-09-27 寺崎電気産業株式会社 回路遮断器の引外し装置
DE10141123B4 (de) * 2001-08-22 2004-01-29 Aeg Niederspannungstechnik Gmbh & Co Kg Auslöseeinheit für Leistungsschalter
KR102053710B1 (ko) * 2019-06-11 2019-12-09 (주)공영엔지니어링 연속 여과 운전이 가능한 마이크로 여과기 및 이를 이용한 여과시스템

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569879A (en) * 1969-12-08 1971-03-09 Ite Imperial Corp Circuit breaker trip unit assembly with auxiliary time delay armature
DE2854568C2 (de) * 1978-12-18 1982-09-02 Brown, Boveri & Cie Ag, 6800 Mannheim Selektivschutzvorrichtung für einen strombegrenzenden Schalter
DE2945618A1 (de) * 1979-10-23 1981-05-07 BBC AG Brown, Boveri & Cie., Baden, Aargau Verfahren zum oeffnen eines ueberstromschalters sowie ueberstromschalters sowie ueberstromschalter zur ausfuehrung des verfahrens

Also Published As

Publication number Publication date
DE3347121A1 (de) 1985-07-11
JPH0150056B2 (enrdf_load_stackoverflow) 1989-10-27
JPS60157130A (ja) 1985-08-17
EP0148112A1 (de) 1985-07-10
US4599590A (en) 1986-07-08
DE3462731D1 (en) 1987-04-23

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