WO2014108248A1 - Verrouillage de connexion destiné à un appareil de protection basse tension - Google Patents

Verrouillage de connexion destiné à un appareil de protection basse tension Download PDF

Info

Publication number
WO2014108248A1
WO2014108248A1 PCT/EP2013/075040 EP2013075040W WO2014108248A1 WO 2014108248 A1 WO2014108248 A1 WO 2014108248A1 EP 2013075040 W EP2013075040 W EP 2013075040W WO 2014108248 A1 WO2014108248 A1 WO 2014108248A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
switching mechanism
handle
low
voltage protection
Prior art date
Application number
PCT/EP2013/075040
Other languages
German (de)
English (en)
Inventor
Ludwig Niebler
Alexander Zhukowski
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2014108248A1 publication Critical patent/WO2014108248A1/fr

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
    • H01H71/10—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
    • 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

Definitions

  • the invention relates to a switching lock, in particular for
  • Low-voltage protection devices with a knee joint which comprises a handle and a first U-bracket attached thereto, wherein in the handle a spring element is arranged and wherein the first U-bracket mechanically in operative connection with a pawl, which via a second U-bracket mechanically in contact with a shift lever, as well as a protective device.
  • the protective device When the protective device is switched on, at least one switch-off spring is pre-tensioned in the switchgear.
  • the protective device is designed so that current monitoring groups such as bimetal triggers, continuously measure the flow of current in a branch line. If the current flow exceeds a specified threshold value, the opening spring pre-loaded in the switch lock is unlatched. The unlatched spring force is transmitted to the main contacts via the switch lock mechanism, which are then opened. As a result, the flow of current is interrupted.
  • a low-voltage protection device has a rather passive task, that is, it is switched on once after installation in a control cabinet and remains in this state until a system failure occurs.
  • the object of the present invention is to provide a switch lock, in particular for low-voltage protection devices, and a corresponding protective device which functions reliably and minimizes the risk of unrecognized material defects.
  • a switching mechanism in particular for low-voltage protective devices with the Merkma- len of claim 1 and by a protective device with the features of claim 10. Further embodiments of the invention will become apparent from the dependent claims, the description and the drawings. According to the invention this object is achieved by a switching mechanism, in particular for low-voltage protective devices with a knee joint, which comprises a handle and a first U-bracket attached thereto, wherein in the handle a spring element is arranged and wherein the first U-bracket mechanically in operative connection with a pawl is, which is mechanically connected via a second U-bracket with a shift lever.
  • the invention is characterized in that the spring element in the handle is designed such that the knee joint remains stretched under load with a plurality of opening springs, but moves under load with only one opening spring in the off position.
  • the invention also includes a protective device with a switch lock according to the invention.
  • the switching mechanism according to the invention has a knee joint, which comprises a handle, which is preferably formed as a toothed rocker, and a first U-bracket, wherein in the
  • a spring element preferably a torsion spring
  • the U-bracket has two legs, which are arranged on the one hand in the handle and the other in a pawl.
  • a second U-bracket is arranged, which connects the pawl mechanically with the shift lever. This switching mechanism is arranged between two circuit boards.
  • the switching mechanism according to the invention a plurality, in particular at least two Ausschaltfedern on.
  • the first opening spring is preferably designed as a torsion spring, with two ends, wherein the one end on the shift lever and the other end to a first extension of a
  • the second opening spring is preferably designed as a tension spring and also has two ends, wherein the one end is attached to a second extension of a circuit board and the other end to the shift lever.
  • the handle in particular toothed rocker, in which a torsion spring is arranged, applied with a torque "Mdf" counterclockwise. This torque counteracts with the lever arm "H" the
  • a stop is provided in the housing.
  • the force “F” comes from a preloaded opening spring, which is tensioned during the switch - on process, and whose force is transmitted via several mechanical parts to the upper U - bar.
  • the torque "Ma” acts clockwise in the switched-on position on the gearshift lever.
  • the feature essential to the invention is that at least two opening springs are provided in the switching mechanism with knee joint. These may be, for example, a tension spring and a torsion spring. This gives the equation for the force F acting on the upper U-bar:
  • F D r ehfede r corresponds to the force acting on the upper, former U-bracket, which originates from a torsion spring located somewhere in the transmission.
  • Each individual opening spring is dimensioned in terms of power so that it can open the main contacts alone a small piece.
  • the opening travel which can be achieved by a switch-off spring, is so great that at rated voltage, a current flow through the main contacts comes to a standstill.
  • the action of the return spring in the toothed rocker (“MDF”) is dimensioned so that the knee joint remains stretched when loaded with two opening springs, but is moved counterclockwise when loaded with only one opening spring.
  • the invention is characterized in that the effect of the return spring in the handle, so in the toothed rocker is dimensioned so that the knee joint is stretched under load with two Ausschaltfedern, but is moved under load with only one opening spring in the off position.
  • the advantage is that if a break-off spring in the switch lock breaks, the low-voltage protection device switches off automatically. The plant comes to a standstill and the fault is detected even before a dangerous situation occurs.
  • the low-voltage protection device is preferably a circuit breaker or a motor branch.
  • the handle is designed as a toothed rocker.
  • the spring element is designed as a torsion spring.
  • the first opening spring is designed as a torsion spring.
  • the first switch-off spring has two ends, wherein the one end on Shift lever and the other end is fastened to a first extension of a circuit board.
  • a second opening spring is designed as a tension spring. It is inventively provided that the second opening spring has two ends, wherein one end is attached to a second extension of a circuit board and the other end on the shift lever.
  • the invention also includes a protective device, in particular a low-voltage protection device, with a switching mechanism according to the invention.
  • the switching mechanism according to the invention is characterized in that the action of the return spring in the handle is dimensioned so that the knee joint is stretched under load with two opening springs, but is moved under load with only one opening spring in the off position.
  • the switching mechanism according to the invention thus enables reliable operation and minimizes the risk of unrecognized material defects.
  • FIG. 1 shows a side view of a switching mechanism according to the invention with a force diagram in switched-on switching position
  • Fig. 2 in a perspective view of the switching mechanism according to the invention of FIG. 1 with two opening springs.
  • Fig. 1 shows the switching mechanism 1 according to the invention, which comprises a knee joint, which comprises a handle 2, which is preferably designed as a toothed rocker, and a first U-bracket 3, wherein in the handle 2, a spring element 4, preferably a torsion spring is arranged.
  • the U-bracket 3 has two legs 5, 6, which are arranged on the one hand in the handle 2 and on the other hand in a pawl 7.
  • a second U-bracket 8 is arranged, which connects the pawl 7 mechanically with a shift lever 9.
  • the force "F” comes from a prestressed opening spring, which is tensioned during the switch-on process and whose force is transmitted to the U-bracket 3 via several mechanical parts.
  • the switching mechanism 1 in the installed state between two circuit boards 10, 11 is shown. From Fig. 2 it is apparent that the switching mechanism of the invention a plurality, in particular at least two Ausschaltfedern 12, 13 has.
  • the first opening spring 12 is preferably designed as a torsion spring with two ends, wherein the one end is attached to the shift lever 9 and the other end to a first extension 14 of the circuit board 11.
  • the second opening spring 13 is preferably designed as a tension spring and also has two ends, wherein one end is attached to a second extension 15 of the circuit board 11 and the other end on the shift lever 9.
  • Feather spring corresponds to the force acting on the upper, first U-bracket, which originates from a tension spring located somewhere in the transmission.
  • FDrehfeder corresponds to the force on the upper, former U-bracket, which originates from somewhere in the transmission arranged torsion spring.
  • Each individual opening spring is dimensioned in terms of power so that it can open the main contacts alone a small piece.
  • the opening travel which can be achieved by a switch-off spring, is so great that at rated voltage, a current flow through the main contacts comes to a standstill.
  • the action of the return spring in the toothed rocker (“Mdf”) is dimensioned so that the knee joint remains stretched under load with two opening springs, but is moved counterclockwise in the off position when loaded with only one opening spring.
  • the invention is characterized in that the effect of the restoring spring in the handle, that is in the toothed rocker is dimensioned such that the The knee joint remains stretched under load with two opening springs, but is moved to the off position under load with only one opening spring.
  • the advantage is that when a break-off spring breaks in the switch lock, the low-voltage protection device switches off automatically. The plant comes to a standstill and the fault ler is discovered even before a dangerous situation occurs.
  • the switch lock according to the invention enables reliable operation and minimizes the risk of unrecognized material defects.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

L'invention concerne un verrouillage de connexion (1) destiné en particulier à un appareil de protection basse tension et comprenant une genouillère qui comprend une manette (2) à laquelle est fixé un premier étrier en U (3), un élément élastique (4) étant agencé dans la manette (2) et le premier étrier en U (3) étant en interaction mécanique avec un cliquet (7) qui est en interaction mécanique avec un levier de commande (9) par l'intermédiaire d'un deuxième étrier en U (8). L'invention concerne également un appareil de protection. L'invention est caractérisée en ce que l'élément élastique (4) est réalisé dans la manette (2) de telle manière que la genouillère reste tendue sous l'action d'une pluralité de ressorts de déclenchement (12, 13), mais adopte la position déclenchée sous l'action d'un seul ressort de déclenchement (12 ou 13).
PCT/EP2013/075040 2013-01-14 2013-11-29 Verrouillage de connexion destiné à un appareil de protection basse tension WO2014108248A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13151144.6A EP2755222B1 (fr) 2013-01-14 2013-01-14 Mécanisme de verrouillage pour appareils de protection basse tension
EP13151144.6 2013-01-14

Publications (1)

Publication Number Publication Date
WO2014108248A1 true WO2014108248A1 (fr) 2014-07-17

Family

ID=47563210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/075040 WO2014108248A1 (fr) 2013-01-14 2013-11-29 Verrouillage de connexion destiné à un appareil de protection basse tension

Country Status (2)

Country Link
EP (1) EP2755222B1 (fr)
WO (1) WO2014108248A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213032B4 (de) 2015-07-13 2022-04-21 Siemens Aktiengesellschaft Schaltschloss für Niederspannungsschutzgeräte und Leistungsschalter mit einem Schaltschloss

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468987C (de) * 1925-01-31 1928-12-04 Otto Dreyer Dipl Ing Selbstschalter mit Freiausloesung
DE652199C (de) * 1932-03-20 1937-10-27 Siemens Schuckertwerke Akt Ges Antrieb fuer Fluessigkeitsschalter mit Lichtbogenloeschung durch den beim Abschalten entwickelten Dampf, insbesondere fuer Expansionsschalter
DE722734C (de) * 1939-05-17 1942-07-20 Stotz Kontakt Gmbh Installations-Schalter mit Kippschaltwerk
US3432787A (en) * 1966-04-05 1969-03-11 Square D Co Manually operated switch
DE29701829U1 (de) * 1997-02-03 1997-04-10 Siemens Ag Schaltgerät mit Drehantrieb
DE19703959C1 (de) * 1997-02-03 1998-04-23 Siemens Ag Schaltgerät mit Tripped-Stellung des Schaltschlosses
WO2004073008A1 (fr) * 2003-02-14 2004-08-26 Siemens Aktiengesellschaft Disjoncteur electromagnetique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468987C (de) * 1925-01-31 1928-12-04 Otto Dreyer Dipl Ing Selbstschalter mit Freiausloesung
DE652199C (de) * 1932-03-20 1937-10-27 Siemens Schuckertwerke Akt Ges Antrieb fuer Fluessigkeitsschalter mit Lichtbogenloeschung durch den beim Abschalten entwickelten Dampf, insbesondere fuer Expansionsschalter
DE722734C (de) * 1939-05-17 1942-07-20 Stotz Kontakt Gmbh Installations-Schalter mit Kippschaltwerk
US3432787A (en) * 1966-04-05 1969-03-11 Square D Co Manually operated switch
DE29701829U1 (de) * 1997-02-03 1997-04-10 Siemens Ag Schaltgerät mit Drehantrieb
DE19703959C1 (de) * 1997-02-03 1998-04-23 Siemens Ag Schaltgerät mit Tripped-Stellung des Schaltschlosses
WO2004073008A1 (fr) * 2003-02-14 2004-08-26 Siemens Aktiengesellschaft Disjoncteur electromagnetique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213032B4 (de) 2015-07-13 2022-04-21 Siemens Aktiengesellschaft Schaltschloss für Niederspannungsschutzgeräte und Leistungsschalter mit einem Schaltschloss

Also Published As

Publication number Publication date
EP2755222A1 (fr) 2014-07-16
EP2755222B1 (fr) 2016-03-23

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