EP2095387B1 - Appareil de commutation d'installation comprenant un blocage double - Google Patents

Appareil de commutation d'installation comprenant un blocage double Download PDF

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Publication number
EP2095387B1
EP2095387B1 EP07819680.5A EP07819680A EP2095387B1 EP 2095387 B1 EP2095387 B1 EP 2095387B1 EP 07819680 A EP07819680 A EP 07819680A EP 2095387 B1 EP2095387 B1 EP 2095387B1
Authority
EP
European Patent Office
Prior art keywords
contact bridge
slide
opening
contact
switching device
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.)
Active
Application number
EP07819680.5A
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German (de)
English (en)
Other versions
EP2095387A1 (fr
Inventor
Ralf MÜLLER
Frank Hustert
Hans-Peter Weyand
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 AG Germany
Original Assignee
ABB AG Germany
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 AG Germany filed Critical ABB AG Germany
Publication of EP2095387A1 publication Critical patent/EP2095387A1/fr
Application granted granted Critical
Publication of EP2095387B1 publication Critical patent/EP2095387B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/12—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
    • 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
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism

Definitions

  • the invention relates to an installation switching device with a double interruption according to the preamble of claim 1.
  • Generic installation switching devices such as motor protection switch, have at least one Polstrompfad, comprising two fixed contacts and two arranged on a movable contact bridge movable contact pieces through which a pole switch with two contacts and double interruption is formed.
  • the contact bridge is acted upon by a pusher in the opening direction and by a contact pressure spring in the closing direction.
  • the pusher comprises a slider and a striker, which are arranged substantially displaceable in the direction of movement of the contact bridge relative to this and relative to each other, wherein the arrangement of slide, striker, contact bridge, active lever and armature is arranged so that in case of short circuit, the anchor over the striker the contact bridge opens in the opening direction, the slider lags the striker before the active lever holds the contact bridge against the contact pressure force permanently in the open position on the slide.
  • the pusher according to the invention is thus designed in two pieces. This makes it possible that a first part of the pusher, namely the striker pin can be accelerated very quickly by the anchor in the event of short circuit due to its small mass and thus very quickly hits the contact bridge.
  • the striker lagging slider can slow this countermovement of the contact bridge, so that the contact bridge is prevented from closing the contacts before the active lever, in the due to the greater mechanical inertia of the switch latch the striker still lags, Finally, the contact bridge is permanently held in the open position via the slide.
  • the contact bridge is guided displaceably in a first opening of the slider in its direction of movement.
  • the striker pin is slidably guided in a second opening of the slider in the direction of movement of the contact bridge.
  • the leadership of the striker pin in the second opening of the slide is advantageously dimensioned so that the striker pin in its opening direction of the contact bridge due to an existing frictional force between striker and slider entrains this in the opening direction lagging.
  • the slider in the first opening has a first shoulder, which forms an upper stop for the contact bridge. This ensures a very compact structure. If the slider strikes in its opening direction of the contact bridge in its stroke following the striker pin, then the opposite action of the contact bridge in the closing direction is slowed down by the first shoulder acting as an upper stop.
  • the slider has on its outer side a second shoulder, which forms a point of application for the active lever.
  • the arrangement of striker, slide and contact bridge is dimensioned so that the mass of the slider is equal to or greater than the sum of the masses of striker and contact bridge. This results in the advantage that the force of the return spring on the contact bridge is smaller than the force acting on the contact bridge due to the genetic energy of the striker pin when opening.
  • the slide in the first, the contact bridge leading opening has a third paragraph, which forms a lower stop for the contact bridge.
  • the third paragraph takes the contact bridge at its impact movement in the opening direction, the slider initially a piece in the opening direction and thereby supports the pursuit pin lagging movement in the opening direction. If after the collapse of the electrodynamic Rebound of the electromagnetic release, the contact bridge due to the force of the contact pressure spring moves in the opposite direction in the closing direction, so in the embodiment just described, the slider has advanced even further in the opening direction and meets with his first paragraph even earlier on the contact bridge, creating an even more effective braking the opposite closing movement of the contact bridge is done.
  • FIGS. 1 to 8 each identical or equivalent elements or assemblies are each denoted by the same reference numerals.
  • FIG. 1 shows an inventive switching device 1 with a Polstrompfad 2 between an input terminal 3 and an output terminal 4. It could for example be a Polstrompfad a three-pole motor protection switch, the other two Polstrompfade are constructed accordingly.
  • the pole current path 2 comprises two fixed contact pieces 5, 6 and two movable contact pieces 8, 9 arranged on a movable contact bridge 7, through which a contact point 10 with double interruption is formed.
  • the contact bridge 7 is acted upon by a contact pressure spring 11 in the closing direction, see directional arrow S.
  • a pusher 12 which engages the contact pressure spring 11 opposite side of the contact bridge 7, this can be applied in the opening direction, see direction arrow O.
  • the Polstrompfad 2 also includes a thermal release 113 and an electromagnetic release 13 with an armature which in the case of occurring in the Polstrompfad 2 short-circuit current due to an electrodynamic recoil on the pusher 12, the contact bridge 7 in the opening direction, indicated by the action line 1.4.
  • the armature of the electromagnetic release 13 acts in the event of a short circuit on a switching mechanism 15 and unlocks the Verklinkungsstelle, indicated by the action line 16, so that the switching mechanism 15 in the unlatched state via a knuckle 17, indicated by the action line 18, the pusher 12 permanently in Opening direction of the contact bridge 7 acted upon.
  • thermal release 113 which also acts in the case of an overcurrent on the switching mechanism 15, indicated by the action line 114, is known in principle and not the subject of the present invention.
  • the thermal release 113 is shown here only for the sake of completeness.
  • the mechanical system comprising the switching mechanism 15 and the active lever 17 may be, for example, a toggle lever system with a two-stage latch.
  • the active lever 17 is designed as a double arm lever whose first, acted upon by the switching mechanism 15 lever arm 171 and the second, cooperating with the pusher 12 lever arm 172 form an obtuse angle with each other and is rotatably mounted in a stationary axis of rotation 173, whereby the active lever 17 as a lever acts.
  • the mechanical system just described has a certain mechanical inertia, which after unlatching a certain amount of time, for example 2 to 5 ms, passes before the active lever 17 hits the pusher 12 to apply this permanently in the opening direction.
  • the time to direct strike of the contact bridge 7 by the armature of the electromagnetic release 13 is much shorter, it is for example only 1 ms.
  • the pusher 12 is designed in two parts. It comprises a slider 19 and a striking pin 20. As in the sectional view of Figure 1 b can be seen, the pusher 12 is an elongate member having approximately a cylindrical or cuboidal basic shape.
  • the striker 20 is also movably guided in the closing or opening direction of the contact bridge 7 in a second, channel-like opening 22 in the slide 19. It projects beyond the slide 19 in the direction of the point of the impact anchor.
  • a first shoulder 23 is formed, which serves as an upper stop for the contact bridge 7.
  • a second shoulder 24 is formed, which serves as a point of attack for the active lever 17.
  • FIG. 2a shows this state in which the contact bridge 7, driven by the striker 20, had reached its maximum deflection in the opening direction O.
  • the contact pressure spring 11 is completely compressed.
  • FIG. 5a is that time detected in which the inertia delay of the mechanical system consisting of the switching mechanism 15 and the active lever 17 is completed and designed as a toggle lever 17 is rotated by the switching mechanism 15, indicated by the action arrow K, clockwise.
  • the contact point 10 is still open.
  • the slider 19 Upon further upward movement in the closing direction S, the slider 19 hits with its second paragraph 24 on the rotating further clockwise active lever 17.
  • the switching mechanism 15 is unlatched, and holds - indicated by the arrow K - the active lever 17 permanently in such a position that he holds on the second paragraph 24 the slider 19 so far in the opening direction O that the contact point 10 remains permanently open. A contact bounce has obviously not occurred.
  • the opening of the contact bridge 7 through the armature of the electromagnetic release 13 takes place in the manner described above, preferably with small and medium short-circuit currents. At high short-circuit currents, approximately greater than 1 to 2 kA, the opening is located via an electrodynamic repulsion between the fixed and movable contact pieces 5.6; 8,9 instead. It is also called an opening by electrodynamic repulsion between the contact pieces.
  • This opening by e-lektrodynamisch repelling takes place faster than the opening through the anchor, since no mechanically moving intermediate parts, such as the anchor represents involved and therefore no inertia-related time delay occurs. In this case, the armature initially trails the contact bridge. Prevention of premature closing of the pad occurs after the initial rapid opening due to the electrodynamic repulsion, but then in the subsequent time exactly as described above.
  • FIG. 7 shows a further embodiment of a slide 19a according to the invention.
  • the first opening 21 is closed at the bottom by a web 25.
  • the range of movement of the contact bridge 7 is thus limited in the first opening 21 between acting as the upper stop first shoulder 23 and the web 25.
  • the advantageous effect of the web 25 is that during the downward movement of the striker pin 20, this acts as a lower stop and the slider 19 actively takes down in the opening direction. He supported by the trailing entrainment of the slider 19 down in the opening direction O by the striker 20th
  • FIG. 8 Another variant shows the FIG. 8 , There are instead of a continuous web in the first opening 21 at the open end of two paragraphs 26 each with bevelled side surfaces 27 attached. The entrainment of the slide 19 through the contact bridge 7 takes place via the inclined surfaces 27th
  • the service switching device thus comprises two moving systems.
  • the first moving subsystem comprises the striker 20 and the contact bridge 7, to the second moving subsystem includes the slider 19.
  • the two moving subsystems must be dimensioned so that the force of the contact pressure spring 11 on the contact bridge 7 is smaller than the force that the Striker 20 learns due to the kinetic energy communicated to him from the armature of the electromagnetic actuator 13 by the impact.
  • the mass of the slider 19 must be greater or at least equal to the sum of the masses of the striker pin 20 and the contact bridge. 7

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lock And Its Accessories (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (9)

  1. Appareillage électrique d'installation (1) doté d'au moins un chemin de courant polaire (2), comprenant deux pièces de contact fixes (5, 6) et deux pièces de contact mobiles (8, 9) disposées sur un cavalier de contact (7) mobile, par le biais desquelles est formé un commutateur polaire doté de deux contacts et d'une double interruption, le cavalier de contact (7) étant chargé par un poussoir (12) dans le sens de l'ouverture (0) et par un ressort à compression de contact (11) dans le sens de la fermeture (S), comprenant un déclencheur électromagnétique (13) dont l'induit de frappe, en cas de court-circuit, percute le cavalier de contact (7) par le biais du poussoir (12) dans le sens de l'ouverture (0) et en même temps libère le point d'encliquetage d'un verrouillage de connexion (15), de sorte que le verrouillage de connexion (15), par le biais d'un levier actionneur (17) chargeant le poussoir (12), charge le cavalier de contact (7) dans le sens de l'ouverture continuellement en s'opposant à la force du ressort à compression de contact (11), le poussoir (12) comprenant un curseur (19) et une broche de frappe (20), lesquels sont disposés sensiblement dans le sens du mouvement du cavalier de contact (7) de manière coulissante par rapport à celui-ci et l'un par rapport à l'autre, caractérisé en ce que
    l'arrangement composé du curseur (19), de la broche de frappe (20), du cavalier de contact (7), du levier actionneur (17) et de l'induit est conçu de telle sorte qu'en cas de court-circuit, l'induit percute le cavalier de contact (7) par le biais de la broche de frappe (20) dans le sens de l'ouverture (0), le curseur (19), du fait d'une interaction mécanique existante entre la broche de frappe (20) et le curseur (19), étant en retard par rapport à la broche de frappe (20) dans le sens de l'ouverture avant que le levier actionneur (17) maintienne le cavalier de contact (7) durablement en position ouverte par le biais du curseur (19) en s'opposant à la force de compression de contact.
  2. Appareillage électrique d'installation (1) selon la revendication 1, caractérisé en ce que le cavalier de contact (7) est guidé de manière coulissante dans le sens de son mouvement dans une première ouverture (21) du curseur (19).
  3. Appareillage électrique d'installation (1) selon l'une des revendications précédentes, caractérisé en ce que la broche de frappe (20) est guidée de manière coulissante dans le sens du mouvement du cavalier de contact (7) dans une deuxième ouverture (22) du curseur (19).
  4. Appareillage électrique d'installation (1) selon la revendication 3, caractérisé en ce que le curseur (19) possède dans la première ouverture (21) un premier talon (23) formant une butée supérieure pour le cavalier de contact (7).
  5. Appareillage électrique d'installation (1) selon la revendication 4, caractérisé en ce que le curseur (19) possède sur son côté extérieur un deuxième talon (24) formant un point d'application pour le levier d'actionnement (17).
  6. Appareillage électrique d'installation (1) selon la revendication 5, avec lequel l'arrangement composé de la broche de frappe (20), du curseur (19) et du cavalier de contact (7) est dimensionné de telle sorte que la masse du curseur (19) est égale ou supérieure à la somme des masses de la broche de frappe (20) et du cavalier de contact (7).
  7. Appareillage électrique d'installation (1) selon la revendication 5, caractérisé en ce que le curseur (19) possède dans la première ouverture (21) un troisième talon (26) formant une butée inférieure pour le cavalier de contact (7).
  8. Appareillage électrique d'installation (1) selon la revendication 5, caractérisé en ce que le curseur (19) possède à l'extrémité libre de la première ouverture (21) une nervure (25) qui recouvre l'ouverture, laquelle forme une butée inférieure pour le cavalier de contact (7).
  9. Appareillage électrique d'installation (1) selon l'une des revendications précédentes, caractérisé en ce que dans le cas de courants de court-circuit élevés, l'ouverture du cavalier de contact (7) s'effectue par une répulsion électrodynamique entre les pièces de contact fixes (5, 6) et les pièces de contact mobiles (8, 9) et l'induit de frappe est en retard par rapport au cavalier de contact (7).
EP07819680.5A 2006-11-22 2007-11-08 Appareil de commutation d'installation comprenant un blocage double Active EP2095387B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006055007A DE102006055007A1 (de) 2006-11-22 2006-11-22 Installationsschaltgerät mit einer Doppelunterbrechung
PCT/EP2007/009670 WO2008061630A1 (fr) 2006-11-22 2007-11-08 Appareil de commutation d'installation comprenant un blocage double

Publications (2)

Publication Number Publication Date
EP2095387A1 EP2095387A1 (fr) 2009-09-02
EP2095387B1 true EP2095387B1 (fr) 2015-10-14

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EP07819680.5A Active EP2095387B1 (fr) 2006-11-22 2007-11-08 Appareil de commutation d'installation comprenant un blocage double

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US (1) US8138862B2 (fr)
EP (1) EP2095387B1 (fr)
CN (1) CN101542668B (fr)
DE (1) DE102006055007A1 (fr)
WO (1) WO2008061630A1 (fr)

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Also Published As

Publication number Publication date
CN101542668A (zh) 2009-09-23
DE102006055007A1 (de) 2008-05-29
US20100019873A1 (en) 2010-01-28
WO2008061630A1 (fr) 2008-05-29
US8138862B2 (en) 2012-03-20
EP2095387A1 (fr) 2009-09-02
CN101542668B (zh) 2012-11-07

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