EP3176798A1 - Système de contact d'un commutateur d'installation électrique - Google Patents

Système de contact d'un commutateur d'installation électrique Download PDF

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Publication number
EP3176798A1
EP3176798A1 EP16201325.4A EP16201325A EP3176798A1 EP 3176798 A1 EP3176798 A1 EP 3176798A1 EP 16201325 A EP16201325 A EP 16201325A EP 3176798 A1 EP3176798 A1 EP 3176798A1
Authority
EP
European Patent Office
Prior art keywords
contact
piece
rocker
fixed
contact piece
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.)
Granted
Application number
EP16201325.4A
Other languages
German (de)
English (en)
Other versions
EP3176798B1 (fr
Inventor
Sven Diehl
Manfred Lange
Manfred Ewers
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 Schweiz AG
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
Priority claimed from DE102016102457.0A external-priority patent/DE102016102457A1/de
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP3176798A1 publication Critical patent/EP3176798A1/fr
Application granted granted Critical
Publication of EP3176798B1 publication Critical patent/EP3176798B1/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/023—Composite material having a noble metal as the basic material

Definitions

  • the invention relates to a present in a switch insert contact system of an electrical installation device according to the features of claim 1 and is preferably used in switches of flush-mounted and surface-mounted installation devices.
  • a rocker switch is pivotally mounted or rotatably mounted on the switch housing, wherein the rocker acting on a dipping into the switch housing actuating arm on a contact rocker or a contact spring.
  • the kinematics of a switch usually requires an inclination of the contact rocker to ensure the states "on” and "off".
  • the contact point is not optimal in the center of the contact point or contact surface of the contact piece.
  • the switch insert is also equipped with connection terminals for the connection of electric cables, which interact with at least one contact piece and with the contact rocker mounted on a contact rocker bearing.
  • the electric cables can be electrically connected to one another by means of the contact rocker which can be acted upon by the switching rocker.
  • the contact rocker is typically made of a bent part of electrically conductive metal.
  • a derailleur of an installation switch with a switch housing is known in which a rocker switch is pivotally mounted and acts on a movable contact piece, which is also pivotally contacted in two stable end positions each contacted a fixed contact piece.
  • the movable contact piece is designed as a contact rocker and resiliently mounted.
  • movable contact springs which carry at their free ends in each case a riveted, soldered or welded Kunststoffniet, which is provided for example with a erosion-resistant silver alloy, such as silver-nickel, silver metal oxides or weld-resistant silver graphite.
  • a erosion-resistant silver alloy such as silver-nickel, silver metal oxides or weld-resistant silver graphite.
  • rocker switch or rocker switch electrical switching device which has a device base with switching chambers, with connection contacts for electrical conductors to be connected and with at least one arranged therein, of first and second fixed contacts and at least one movable as rocker contact formed contact system.
  • the movable contact is operable by an associated actuator.
  • the fixed contacts are provided with a contact tab on which a contact pad is mounted, which cooperates with the movable contact.
  • the cooperating with the contact plate end of the contact rocker is also occupied on both sides with other contact pads.
  • the contact plates have a plane-parallel surface.
  • the contact plates often welded on the contacts are due to their structural design and due to the kinematics of the switch inclined position of the contact rocker, subjected to a natural abrasion during the switching process. This is due to the fact that the contact points of the contacts do not extend perpendicular to the direction of movement of the switching rocker, so that the contact point is not optimally located in the center of the contact point or contact surface. As a result, a secure contact at the contact point may be impaired.
  • the worn through the switching contacts contact plates are not or only at great expense interchangeable.
  • the invention has for its object to provide a contact system for an electrical installation device, in particular a switch, which avoids the aforementioned disadvantages and in particular a one-sided abrasion of the contact material reduced the contact piece of the contact rocker of the switch.
  • the contact system according to the invention is preferably used as a surface-mounted switch or flush-mounted switch in the interior or exterior of a building.
  • an installation switch integrated contact system according to the invention is composed of a contact rocker with at least one switching contact, hereinafter also called contact piece constructed.
  • the contact piece exerts a contact force upon actuation of the contact rocker on at least one fixed contact, whereby the contact piece contacts the fixed contact in its end position.
  • the fixed contact is preferably formed integrally with a flat surface.
  • contact piece for example, welded or soldered pad is inventively formed of a hybrid material, applied to the contact piece base or substrate made of a non-precious, weldable material, such as nickel, copper-nickel, copper-tin or copper-nickel Zinc alloys, and the noble metal-containing composite material applied thereto, hereinafter referred to as contact material, consists of a material with high conductive properties but low weldability, such as, for example, a silver alloy.
  • a non-precious, weldable material such as nickel, copper-nickel, copper-tin or copper-nickel Zinc alloys
  • contact material consists of a material with high conductive properties but low weldability, such as, for example, a silver alloy.
  • the on the contact piece or the fixed contact, preferably welded, base material is flattened or bevelled wedge-shaped.
  • the angle of inclination of the wedge-shaped base material is dependent on the inclination of the contact rocker.
  • the tilt of the contact rocker is necessary to ensure the states “on” and “off” of the contact system.
  • the angle of inclination of the base material welded onto the switch contact is approximately 13 degrees, whereby an optimal positioning of the contact point when the switch is switched on or off is achieved.
  • the composite applied to the base material is preferably a spherically shaped contact material.
  • the achievable with the present invention consist in particular in that the welded-on contact point or contact surface of the switching contact with its wedge-shaped configuration of the base material prevents uneven wear of the relatively expensive base material to the contact material.
  • the contact system according to the invention formed from the contact rocker, the switching contact and the fixed contact formed thereon can be in different switch variants, such as switches with one or more switching chambers, switches with one or more paddles, single switches, change or intermediate position switches or double or double pole Realize switches.
  • Fig. 1 is a section through a switch insert 1 shown as a switch-off installation switch according to the prior art shown, in which two contact rockers 10 are each pivotally mounted.
  • a contact piece 20 also called switching contact, configured, which in each case contacted a fixed contact 30 upon actuation of the contact piece 20 in connection with the switch.
  • the contact point 40 is formed by a welded on the contact 20 contact plate that comes with a corresponding actuation of the switch in the axial direction with the fixed contact 30 in energized contact.
  • Fig. 2 is a section of the contact system according to the invention, which is installed in a switch insert 1 of a circuit breaker, shown on the switch housing the contact paddles 10, as already in Fig. 1 shown, are pivotally mounted.
  • the contact rockers 10 also have here at their end portions in each case a switching contact 20 for contacting with the fixed contacts 30.
  • the switching contact 20 exerts a contact force upon actuation of the contact rocker 10 on the fixed contact 30, whereby the cooperating with the switching contact 20 fixed contact 30 is electrically connected.
  • the contact pad 40 which is applied on the switch contact 20 and is designed as a contact pad, is formed from a hybrid material whose base material consists of a cost-effective, base, weldable material, usually a copper alloy.
  • the contact material applied to the base material is formed from a higher-grade material, for example a silver alloy, with high conduction properties but low weldability, in order to prevent welding of the surfaces of the switching contact 20 and of the fixed contact 30 with one another.
  • the base material is wedge-shaped flattened or chamfered.
  • Fig. 3 shows the detail of the contact system according to the invention of a switch with a drawn tangent 21 at the apex of a spherically shaped contact material 42 of the switching contact 20.
  • the fixed contact 30 also has a contact piece 50, which is formed integrally with a flat surface in the illustrated case.
  • the base material 41 of the switching contact 20 is wedge-shaped flattened or bevelled so that the tangent 21 at the apex of the spherically shaped contact material 42 in a first contact position 11 to the vertical axis 51 in the contact piece 50 of the fixed contact 30 has a right angle and the vertical axis 51st also has a right angle to the flat surface of the contact piece 50.
  • the first contact layer 11 is here the first position of the contact rocker 10, in which the switching contact 20 contacts the fixed contact 30 (on position).
  • the angle ⁇ which is formed by the contact rocker 10 in the first contact layer 11, and the wedge or inclination angle ⁇ 'of the surface of the base material 41 of the contact piece 20 are approximately equal.
  • the end or the end portion of the contact rocker 10 in the first contact layer 11 is not parallel to the tangent 21, which here runs parallel to the flat surface of the contact piece 50 of the fixed contact.
  • a second position of the contact rocker 10 is shown, in which the contact piece 20 is spaced from the fixed contact 30 (off position).
  • Fig. 4 shows a further section of the contact system according to the invention arranged in the switch insert, the switch contact 20 being welded or soldered to the movable rocker 10 and / or the fixed contact 30, and the base material 41, 61 is additionally embossed with the contact rocker 10 and the fixed contact 30.
  • the one-piece contact piece 50 of the fixed contact 30 shown here has a planar surface and is also designed as a hybrid component, wherein the base material 61 consists of a base, weldable material and the contact material 62 applied thereon consists of a material with high conductive properties and is formed with a flat surface.
  • the contact material 62 of the fixed contact piece 50 may be formed with a spherical surface or if the base material 41 of the switching contact 20 is not wedge-shaped but plane-parallel, the fixed contact piece 50 located on the fixed contact 30 can be used as a hybrid contact piece with a wedge-shaped base material 61 at an angle ⁇ '. and a contact material 62 to the contact piece 20 (not shown in this illustration).
  • the axis 51 is perpendicular to the tangent at the vertex of the contact piece 50.
  • the angle ⁇ ' can be divided between the two base materials 41, 61 of the contact pieces (20, 50).
  • Fig. 5 shows an embodiment of the contact rocker 10 with the switching contact 20 and the contact plate 40 mounted thereon according to the invention, wherein the base material is identified here by the reference numeral 41 and the contact material by the reference numeral 42.
  • the contact plate 40 forms with its chamfered surface or top surface on which the spherically shaped contact material 42 is applied.
  • the angle of inclination of the wedge-shaped base material 41 is dependent on the inclination of the contact rocker 10 when switching on and off of the switch.
  • the angle of inclination of the base base material welded onto the switch contact 20 is approximately 13 degrees, whereby an optimum positioning of the contact point between contact piece 30 and fixed contact 30 is achieved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
EP16201325.4A 2015-12-04 2016-11-30 Système de contact d'un commutateur d'installation électrique Active EP3176798B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015121132 2015-12-04
DE102016102457.0A DE102016102457A1 (de) 2015-12-04 2016-02-12 Kontaktsystem eines elektrischen Installationsschalters

Publications (2)

Publication Number Publication Date
EP3176798A1 true EP3176798A1 (fr) 2017-06-07
EP3176798B1 EP3176798B1 (fr) 2019-04-10

Family

ID=57442540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16201325.4A Active EP3176798B1 (fr) 2015-12-04 2016-11-30 Système de contact d'un commutateur d'installation électrique

Country Status (1)

Country Link
EP (1) EP3176798B1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837818A (en) * 1972-09-11 1974-09-24 Texas Instruments Inc Electrical contact arm material and method of making
DE3740022C1 (en) 1987-11-26 1989-05-03 Kostal Leopold Gmbh & Co Kg Electrical switch
US5471024A (en) * 1994-09-12 1995-11-28 Eaton Corporation Electric switch having improved attachment of movable contact to contact carrier
DE19618014A1 (de) 1996-05-04 1997-11-06 Abb Patent Gmbh Elektrisches Schaltgerät
DE102009038234A1 (de) 2009-08-20 2011-02-24 Abb Ag Schaltwerk eines Installationsschalters
US20120193196A1 (en) * 2011-01-28 2012-08-02 Ching-Hsin Lin Enhanced returning elasticity micro switch
EP2902533A1 (fr) * 2012-09-27 2015-08-05 Dowa Metaltech Co., Ltd Matière de plaquage d'argent et son procédé de fabrication

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837818A (en) * 1972-09-11 1974-09-24 Texas Instruments Inc Electrical contact arm material and method of making
DE3740022C1 (en) 1987-11-26 1989-05-03 Kostal Leopold Gmbh & Co Kg Electrical switch
US5471024A (en) * 1994-09-12 1995-11-28 Eaton Corporation Electric switch having improved attachment of movable contact to contact carrier
DE19618014A1 (de) 1996-05-04 1997-11-06 Abb Patent Gmbh Elektrisches Schaltgerät
DE102009038234A1 (de) 2009-08-20 2011-02-24 Abb Ag Schaltwerk eines Installationsschalters
US20120193196A1 (en) * 2011-01-28 2012-08-02 Ching-Hsin Lin Enhanced returning elasticity micro switch
EP2902533A1 (fr) * 2012-09-27 2015-08-05 Dowa Metaltech Co., Ltd Matière de plaquage d'argent et son procédé de fabrication

Also Published As

Publication number Publication date
EP3176798B1 (fr) 2019-04-10

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