EP0693220B1 - Elektromagnetischer schaltmechanismus für elektrische schutzschaltgeräte - Google Patents

Elektromagnetischer schaltmechanismus für elektrische schutzschaltgeräte Download PDF

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Publication number
EP0693220B1
EP0693220B1 EP94905088A EP94905088A EP0693220B1 EP 0693220 B1 EP0693220 B1 EP 0693220B1 EP 94905088 A EP94905088 A EP 94905088A EP 94905088 A EP94905088 A EP 94905088A EP 0693220 B1 EP0693220 B1 EP 0693220B1
Authority
EP
European Patent Office
Prior art keywords
armature
actuating member
electromagnet
switching mechanism
contact carrier
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
EP94905088A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0693220A1 (de
Inventor
Michael Bunselmeyer
Martin Cordsen
Johannes Becker
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 Energietechnik AG
Original Assignee
Felten and Guilleaume Energietechnik 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 Energietechnik AG filed Critical Felten and Guilleaume Energietechnik AG
Publication of EP0693220A1 publication Critical patent/EP0693220A1/de
Application granted granted Critical
Publication of EP0693220B1 publication Critical patent/EP0693220B1/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
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • H01H73/42—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by rotatable knob or wheel
    • 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
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel

Definitions

  • the invention relates to an electromagnetic switching mechanism, in particular for mobile electrical protective switching devices with manual, electromagnetic and free triggering of the contact opening, according to the preamble of claim 1.
  • An electromagnetic switching mechanism for mobile electrical protective switching devices with differential current and undervoltage tripping is described in DE-A-39 37 546.
  • This mechanism has a contact carrier for the movable contacts, which is mounted on a development of a magnetic yoke of a release coil in a slot guide in a positionally variable and pivotable manner and acted upon by a switching spring, and a hinged armature arranged on the magnetic yoke and acted upon by spring tension, which can be actuated simultaneously by an operating handle and against the action of the respective spring are latched together, as well as fixed contacts.
  • the trip coil is connected to electronics arranged on a printed circuit board with a summation current transformer for residual current and undervoltage monitoring and a test device.
  • the hinged anchor is in the latched state on the magnetic yoke, and the contact carrier is now held in the latched state in such a way that it relieves with its contacts from the operating handle under the pressure of the switching spring around the latching point until the contact with the fixed contacts is pivoted, the switching spring also causing the contact pressure.
  • the protective switching device is switched on.
  • the voltage supply to the trip coil is interrupted by a residual current or undervoltage in a known manner via the electronic circuit arrangement of the protective switching device, as a result of which the magnetic field acting on the armature breaks down and this is torn from the magnetic yoke and out of the latch by the action of the return spring.
  • the contact carrier swivels back into its starting position within the slot guide, and the protective switching device is switched off.
  • Another switching mechanism for protective switching devices is known from DE-A-41 22 268.
  • this has a multi-armed shift lever which is arranged in an elongated hole guide against the force of a tension spring and is adjustable and has a multi-armed ratchet lever which is rotatably mounted thereon.
  • This is connected on one of its arms to form a knee joint with a support lever arranged on an operating handle, acted upon on a second arm by a trigger element and can be brought to a stop on a housing projection with a further, third arm.
  • the switching lever is arranged with one arm acting on a swivel contact acted upon by compression springs.
  • the switching lever and the latch lever are latched with the free end of the support lever in the manner of a knee joint and loaded by a tension spring, the pivot point of the switching lever now being shifted to the system on the release element and the swivel contact, relieved of the shift lever, rests on a fixed contact piece.
  • the triggering element causes the switching lever to rotate counterclockwise, at the same time releasing the catch with the supporting lever and opening the spring-loaded swivel contact arrangement as a result of the further rotary movement.
  • FR-A-2 268 346 (closest prior art) describes an electrical switching device for electrical protective switching devices which has a contact carrier for the switching contacts which is acted upon by a switching spring, an armature arranged on an electromagnet and acting as a lever which can be pivoted about an axis is formed, has a switching shaft (operating handle) and fixed contacts, the switching mechanism being arranged on a holding part and having a release lever (tensioning member).
  • the invention has for its object to provide an electromagnetic switching mechanism for electrical protective switching devices with manual, electromagnetic and free triggering of the contact opening, which can be designed as a compact assembly and suitable for protective switching devices of smaller dimensions and the assembly effort is relatively low.
  • the object is achieved in an electromagnetic switching mechanism according to the preamble of claim 1 by its characterizing features.
  • the advantage of the solution according to the invention is that the one designed as a twist grip on a holding part around the shaft
  • Operating handle arranged switching mechanism is compact and reliable and pre-assembled into an assembly.
  • the named functional elements can be arranged on the front or top of the mounting part and the fixed contacts and the contact carrier with the movable contacts on the back or bottom.
  • the tendon is designed so that when the armature is in contact with the electromagnet, when the rotary handle is rotated and thus the angular position of the articulation axis changes, it can be rotated around the armature actuating element while moving the actuating element of the contact carrier, in a region which is affected by the switching positions " An “and” off “of the contact carrier and the resulting positions of this actuator is given.
  • the tendon In the "on" switch position, the tendon is fixed to the actuating element when the contacts are closed under the pressure of the switching spring and in the angular position of the articulation axis given in this switching position, and can be rotated from this position around the articulation axis when the armature is torn off by the electromagnet under the pressure of the switching spring .
  • This advantageously enables residual current and undervoltage tripping.
  • the switching mechanism is particularly suitable for mobile protective switching devices, since it fulfills the requirement for small dimensions in these devices in an outstanding manner.
  • a contact carrier designed as a rotating element can also be arranged.
  • the measure according to claim 4 is used in a simple manner to facilitate the relative movement between the actuating elements and the tendon and a defined power transmission.
  • the design of the armature according to claim 7, like the measure according to claim 8, serves to increase the sensitivity of the switching mechanism to occurring fault currents and undervoltage.
  • the electromagnetic switching mechanism shown in plan view in FIG. 1 has a holding part 1 , on which the shaft 2 of a rotary handle 2 a with a crank 3 is mounted centrally. On this crank 3 , one leg of a two-leg tendon 4 which surrounds the shaft 2 in an approximately U-shaped manner is articulated.
  • the tendon 4 has an elongated hole-like recess 5 at the end of its other leg and a three-sided recess 6 between it and the attachment of this leg, the mutually facing flanks 7 and 8 of which form an approximately right angle.
  • a cylindrical actuating element 10 can be moved in the recess 5 relative to the latter arranged.
  • This actuating element 10 is arranged on the one arm of an armature 9 designed as a two-armed lever, which is pivotably mounted on the holding part 1 on its pivot axis by means of a cylindrical projection 11 .
  • the end area of the other arm is located in the effective area of an electromagnet 12 also arranged on the holding part 1 , the armature 9 consisting of plastic having in this area an iron plate 12a loaded with degrees of freedom with a contact surface 12b for the electromagnet 12 .
  • the armature 9 is designed such that its pivot axis B is arranged outside the straight line running through the iron plate 12a and the actuating element 10 and on the armature side facing the shaft 2 between the actuating element 10 and the shaft 2 at a distance from this straight line, which is one Fifth of the distance between the actuator 10 and the iron plate 12a corresponds.
  • the actuating element 13 of a arranged on the underside of the mounting part 1 contact slide 14 , which - like the contact slide 14 - is tangential to the shaft 2 at a distance from it , wherein the movement path of this actuator 13 is substantially parallel to the connecting line between the pivot axis B and the shaft 2 and perpendicular to the armature arrangement.
  • the actuating element 10 is located both in the region between the movement path of the actuating element 13 and the pivot axis B and also in the region between the latter and the electromagnet 12 .
  • fixed contacts 19 are detachably held between molded-on holder elements 16 and 17 , fixed by compression springs 18 (FIG. 2).
  • the movable switching contacts 21 are fastened to the contact slide 14 between corresponding receiving elements 20 and 20a .
  • the contact slide 14 has a U-shaped profile, the opening of which faces the mounting part 1, and is slidably supported thereon by means of two pairs of locking elements 22 provided with locking lugs.
  • the range of motion of the contact slide 14 is predetermined by the switch positions "on” and “off” of the movable switch contacts 21 , that is to say by the position in which the switch contacts 21 contact the fixed contacts 19 and by a position in which the switch contacts 21 have a predeterminable distance of the fixed contacts 19 in which there is no longer any electrical contact.
  • the contact slide 14 has a laterally arranged locking part 23 for a compression spring (switching spring) 24 , which is supported at the other end on an element 25 formed on the mounting part 1 and which acts on the latter against the closing direction of the switching contacts 21 .
  • the locking part 22 there is also the actuating element 13 , approximately in the middle of the contact slide 14 , which protrudes through the opening 15 to the upper side of the holding part 1 and there is in engagement with the three-sided recess 6 of the tensioning element 4 .
  • the contacts 19 and 21 are connected to flexible electrical lines 26 which lead to the electrical connections (plugs, sockets) of the protective switching device.
  • the tripping coil 27 of the electromagnet 12 and a summation current transformer 30 have an electronic one arranged on a circuit board Circuit arrangement 29 connected.
  • the electronic circuit arrangement and thus the release coil 27 of the electromagnet 12 is supplied with the necessary supply voltage via an auxiliary contact 28 which is arranged on a movable contact 21 and can be contacted with a mating contact 28a , the closed position of these contacts before reaching the "on" switch position of the contact slide ( 14 ) is given.
  • the electronic circuit arrangement 29 is now able to process fault currents and undervoltage in a known manner and to change the magnetic field on the electromagnet 12 .
  • the switching mechanism is brought into the switching position "off” by turning the twist grip 2a counterclockwise to a stop corresponding to this switching state.
  • the articulation axis A of the tendon 4 is rotated counterclockwise around the shaft 2 , whereby due to the associated change in position of the recess 5 , which causes movement of the actuating element 10 , the armature 9 is brought into contact with the electromagnet 12 .
  • the force acting on the armature 9 in this switching position on the actuating element 10 is directed so that it presses it against the electromagnet 12 .
  • the switching mechanism can be brought from this position into the switching position "on” by turning the twist grip 2a clockwise by 90 degrees.
  • the tendon 4 is rotated about the fixed actuator 10 such that the actuator 13 is moved against the force of the switching spring 24 in the switching position "on", in which the movable switching contacts 21 arranged on the contact slide 14 contact the fixed contacts 19 and thus the switch closed is.
  • the elec Tronic circuit arrangement 29 connected via the auxiliary contact 28 arranged on the contact slide 14 and built up a magnetic field on the electromagnet 12 .
  • the direction and size of the force of the switching spring 24 acting on the actuating element 10 and transmitted via the tension member 4 have changed.
  • the system is self-locking in this position. If the holding force of the electromagnet 12 is reduced, the armature is pressed away by the switching spring 24 when the contacts 19/21 are opened via the actuating element 13 and the elements of the tensioning element 4 and the actuating element 10 acted upon by this spring by the electromagnet 12 , the tensioning element being 4 its pivot axis A is rotated.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Resistance Welding (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)
  • Keying Circuit Devices (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Gas-Insulated Switchgears (AREA)
EP94905088A 1993-04-10 1994-01-19 Elektromagnetischer schaltmechanismus für elektrische schutzschaltgeräte Expired - Lifetime EP0693220B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4311958 1993-04-10
DE4311958A DE4311958C2 (de) 1993-04-10 1993-04-10 Elektromagnetischer Schaltmechanismus für elektrische Schutzschaltgeräte
PCT/EP1994/000125 WO1994024689A1 (de) 1993-04-10 1994-01-19 Elektromagnetischer schaltmechanismus für elektrische schutzschaltgeräte

Publications (2)

Publication Number Publication Date
EP0693220A1 EP0693220A1 (de) 1996-01-24
EP0693220B1 true EP0693220B1 (de) 1996-11-27

Family

ID=6485318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94905088A Expired - Lifetime EP0693220B1 (de) 1993-04-10 1994-01-19 Elektromagnetischer schaltmechanismus für elektrische schutzschaltgeräte

Country Status (10)

Country Link
EP (1) EP0693220B1 (fi)
CN (1) CN1036812C (fi)
AT (1) ATE145759T1 (fi)
AU (1) AU678206B2 (fi)
DE (2) DE4311958C2 (fi)
DK (1) DK0693220T3 (fi)
FI (1) FI111766B (fi)
NO (1) NO306839B1 (fi)
TR (1) TR28262A (fi)
WO (1) WO1994024689A1 (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7449653B2 (en) * 2007-03-29 2008-11-11 Eaton Corporation Positive resetting close latch for closing electrical switching apparatus
CN104239172A (zh) * 2014-09-17 2014-12-24 上海优立检测技术有限公司 一种用于上下电测试的自动测试装置
JP6615426B1 (ja) * 2019-04-08 2019-12-04 三菱電機株式会社 電磁操作装置
CN114284116B (zh) * 2022-03-04 2022-05-03 深圳市恒讯通电子有限公司 一种基于磁性保护的电开关

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR931630A (fr) * 1944-01-19 1948-02-27 Alsthom Cgee Perfectionnements apportés aux relais électromagnétiques à baisse ou manque de tension, notamment pour disjoncteurs
DE1909555C3 (de) * 1969-02-26 1975-02-13 Fa. Heinrich Kopp, Inh. Theodor Simoneit, 8756 Kahl Druckknopfbetätigter Schalter mit thermischer Uberstromauslösung
US4048599A (en) * 1974-04-19 1977-09-13 Elektra Tailfingen Ammann & Cie Electric switching device
DE2419038C3 (de) * 1974-04-19 1978-06-01 Elektra Tailfingen Ammann & Cie Fabrik Elektrischer Schaltapparate, 7470 Albstadt Elektrische Schaltvorrichtung
FR2517114A1 (fr) * 1981-11-26 1983-05-27 Alsthom Cgee Commutateur electrique a commande rotative rappele automatiquement en l'absence de tension
WO1986001936A1 (en) * 1984-09-11 1986-03-27 Heinrich Kopp Gmbh & Co. Kg Variable switch-box for a motor (protection) switch and under-voltage trigger for incorporation in electrical tools etc.
DE3937546A1 (de) * 1989-11-10 1991-05-16 Kopp Gmbh & Co Kg Heinrich Mobiles schutzschaltgeraet mit differenzstrom- und unterspannungsausloesung
DE4122268A1 (de) * 1991-07-05 1993-01-14 Kopp Gmbh & Co Kg Heinrich Schaltmechanismus fuer schutzschaltgeraete

Also Published As

Publication number Publication date
NO954024D0 (no) 1995-10-10
FI111766B (fi) 2003-09-15
ATE145759T1 (de) 1996-12-15
TR28262A (tr) 1996-05-23
NO954024L (no) 1995-10-10
CN1036812C (zh) 1997-12-24
NO306839B1 (no) 1999-12-27
AU5884794A (en) 1994-11-08
EP0693220A1 (de) 1996-01-24
CN1120872A (zh) 1996-04-17
FI954797A (fi) 1995-10-09
DE59401167D1 (de) 1997-01-09
DE4311958C2 (de) 1995-04-20
AU678206B2 (en) 1997-05-22
DK0693220T3 (da) 1997-05-05
WO1994024689A1 (de) 1994-10-27
DE4311958A1 (de) 1994-10-20
FI954797A0 (fi) 1995-10-09

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