EP1983541A1 - Borne à vis et appareil d'installation - Google Patents

Borne à vis et appareil d'installation Download PDF

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Publication number
EP1983541A1
EP1983541A1 EP08005633A EP08005633A EP1983541A1 EP 1983541 A1 EP1983541 A1 EP 1983541A1 EP 08005633 A EP08005633 A EP 08005633A EP 08005633 A EP08005633 A EP 08005633A EP 1983541 A1 EP1983541 A1 EP 1983541A1
Authority
EP
European Patent Office
Prior art keywords
terminal
screw
frame
transverse
transverse leg
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.)
Withdrawn
Application number
EP08005633A
Other languages
German (de)
English (en)
Inventor
Ralf Dipl.-Ing. Wieland
Klaus-Peter Dipl.-Ing. Eppe
Albrecht Dr. Vogel
Wolfgang Wilhelm
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
Priority claimed from DE102007060077A external-priority patent/DE102007060077A1/de
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP1983541A1 publication Critical patent/EP1983541A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • 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
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/0264—Protective covers for terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5855—Electric connections to or between contacts; Terminals characterised by the use of a wire clamping screw or nut

Definitions

  • the invention relates to a screw terminal for an electrical installation device according to the preamble of claim 1.
  • the invention further relates to an electrical installation device according to the preamble of claim 14.
  • Screw terminals are widely used, in particular, in domestic installation technology and serve to connect electrical connection conductors to an installation device, for example a circuit breaker or a fault current circuit breaker.
  • Such installation switching devices have a Isolierstoffgeophuse with at least one front, one of these opposite mounting side, may be provided on the fastening devices for snapping or otherwise attaching the installation switching device to a mounting rail or other fastening device, as well as with the front and the attachment side connecting narrow and broad sides.
  • the screw terminals for connecting the connection conductors are usually mounted in the region of the narrow sides in the service switching device. Inside the service switching device are the other required for the intended function of the service switching device components or assemblies, such as triggers, shifter and contacts, arc quenching, alignment, etc
  • Known screw terminals have a terminal frame with a rectangular cross-section and a clamping screw, which projects through a threaded bore in a first transverse leg of the terminal frame in this. Turning the clamping screw moves the clamp frame along the axis of the clamping screw. Inside the terminal frame, a terminal space is formed for clamping a terminal conductor.
  • Screw terminals additionally have a contact strip on which presses the clamping screw, so that the connection conductor between the contact strip and the second transverse leg is clamped.
  • the clamping screw When the clamping screw is screwed in, it first strikes the contact strip, thereby clamping a connection conductor possibly inserted between the contact strip and the first transverse leg in the first part clamping space in the terminal frame. Upon further rotation of the clamping screw in the screwing direction, the clamping screw is supported on the contact strip, and the clamping frame pushes thereby in the direction of the free end of the clamping screw to the top. As a result, the second transverse leg is moved upward in the direction of the contact strip. A connecting conductor introduced in the second partial clamping space is thereby clamped between the contact strip and the second transverse leg.
  • the housing of the installation device in the interior of which such a screw terminal is arranged, has an insertion opening, through which a connecting conductor in the housing and in the terminal space of the terminal frame is insertable.
  • a connecting conductor in the housing and in the terminal space of the terminal frame is insertable.
  • the object of the invention is therefore to develop a screw of the type mentioned in such a way that a touching of the live terminal frame is prevented in festgeklemmtem connection conductor.
  • That part of the terminal frame which can be touched in the installation position through the insertion opening from outside the device housing is covered by an insulating material.
  • the insulating layer is formed by an insulating plate coupled to the terminal frame.
  • a plate-shaped insulating part is arranged in the region of the second transverse leg, which is formed by the second transverse leg portion of a first end side of the terminal frame and at least a portion of the second transverse leg at its side facing away from the clamping screw side covered.
  • the insulating part may be formed approximately L-shaped and be plugged or clipped on one of the two legs forming the L-shape on the terminal frame.
  • the insulating layer is formed by an insulating film attached to the second transverse limb or by an insulating film sprayed onto the second transverse limb.
  • an insulating part is coupled to the clamping frame, which covers at least one region formed by the second transverse limb of a first end side of the clamping frame.
  • the region of the first end face of the terminal frame which is covered by the insulating part is the region which can be touched from the outside through the insertion opening of the housing.
  • the coupling of the insulating part with the terminal frame can be done by plugging, clipping, snapping, gluing, screwing or otherwise.
  • the insulating member prevents touching the portion of the first end side formed by the second transverse leg.
  • the insulating part extends parallel to the first end side beyond the side facing away from the clamping screw side of the second transverse leg.
  • a web is formed, which projects beyond the second transverse limb parallel to the first end side on the side facing away from the clamping screw.
  • the insulating part completely covers portions of the regions of the first end side formed by the longitudinal limbs, or else the regions of the first end side formed by the longitudinal limbs. According to a further advantageous embodiment of the invention, the insulating part also covers a region of the first end face formed by the first transverse leg. According to a further advantageous embodiment of the invention, the insulating part is fastened by means of at least two snap hooks on the terminal frame. According to a further advantageous embodiment of the invention, the insulating part is dimensioned such that it is impossible to insert a finger through an insertion opening into the installation device.
  • a screw terminal 10 according to the invention is shown.
  • the screw terminal 10 comprises a terminal frame 14, a clamping screw, not shown here, and an insulating part 12.
  • the terminal frame 14 and the clamping screw each consist of an electrically conductive material, usually made of metal, such as stainless steel or a copper alloy.
  • the terminal frame 14 in this example is for receiving a lead with a relatively large cross-section of 50 mm 2 is provided. But on other types of terminal frame, for example, for a conductor cross section of 35 mm 2 , the invention is applicable.
  • the terminal frame 14 is approximately cuboidal and has an approximately rectangular cross section with a first longitudinal leg 20, a second longitudinal leg 22 extending parallel thereto, a first transverse leg 24 running perpendicular to the longitudinal legs 20, 22 and a second transverse leg 26 extending parallel to the first transverse leg 24 ,
  • Perpendicular to the longitudinal limbs 20, 22 and perpendicular to the transverse limbs 24, 26 extend a first end face 30 and a concealed in this representation second end face 32.
  • the first end face 30 has a connection opening 34 which occupies approximately the entire surface of the first end face 30 and is surrounded by the longitudinal legs 20, 22 and the transverse legs 24, 26.
  • the parallel to the first end face 30 extending second end face 32 is configured in a similar manner.
  • the clamp frame 14 is made of a sheet metal strip which is bent to assume the shape described above. The ends of the metal strip overlap in the region of the first transverse leg 24.
  • the first transverse leg 24 has a threaded bore 28 into which a clamping screw can be inserted. An inserted into the connection opening 34 connecting conductor can be clamped by tightening the clamping screw between the clamping screw and the second transverse leg 26.
  • an insulating part 12 is attached in such a way that it covers a part of the first end face 30.
  • the insulating part 12 conceals the region of the first end face 30 formed by the second transverse limb 26 and relatively small subregions of the regions of the first end side 30 formed by the longitudinal limbs 20, 22.
  • the insulating part 12 only covers the region of the first end face 30 formed by the second transverse limb 26. It is also conceivable that the insulating part 12 covers larger portions of the areas formed by the longitudinal legs 20, 22, or that the insulating part 12, the areas of the first end face 30 formed by the longitudinal legs 20, 22 completely covered. Furthermore, it is conceivable that the area of the first end face 30 formed by the first transverse limb 24 is also covered by the insulating part 12.
  • the insulating part 12 is designed such that it not only conceals areas and / or partial areas of the first end face 30 of the clamping frame 14, but additionally extends parallel to the first end face 30 beyond the side of the second transverse leg 26 facing away from the clamping screw. It then forms, so to speak, a web which projects beyond the second clamping leg downwards.
  • first attachment opening 36 In the first longitudinal leg 20 and in the second longitudinal leg 22, a first attachment opening 36, and a second attachment opening 38 are introduced. These attachment openings 36, 38 serve to secure the insulating part 12 by means of corresponding snap hooks.
  • Fig. 2 is that off Fig. 1 known isolation part 12 again shown.
  • the insulating member 12 is made of an electrically insulating material and has substantially the shape of a flat plate. It has a width that correlates with the width of the second transverse leg 26 of the terminal frame 14.
  • the insulating part 12 has a first snap hook 40 and a second snap hook 42, which are designed so that they engage in the mounting holes 36, 38 of the terminal frame 14 and thus fix the insulating member 12 to the terminal frame 14.
  • the insulating member 12 has a head portion 44 which is formed so that the insulating member 12, when fixed to the clamp frame 14, is flush with the side of the second transverse leg 26 which faces the clamp screw.
  • the height of the insulating part 12, that is to say the distance between the head region 44 and a foot region 46 opposite the head region 44, is dimensioned so that the insulating part 12, when fastened to the clamping frame 14, extends beyond the side of the clamping screw facing away from the clamping screw second transverse leg 26 extends beyond.
  • the insulation member 12 has two snap hooks 40, 42 for attachment to the clamp frame 14. It is also conceivable that the insulation member 12 has three or more snap hooks for attachment to the clamp frame 14.
  • a snap hook may be arranged on the rear side 48 of the insulating part 12 such that it engages in a fastening opening provided in the second transverse leg 26 of the fastening frame 14.
  • FIG. 3 an electrical installation device 60 is shown, for example a circuit breaker.
  • the installation device 60 comprises a first housing part 52 and a second housing part 54, which surround the live parts of the installation device 60.
  • the side facing away from the second housing part 54 of the first housing part 52 is referred to as the first broad side 53 and is hidden in this representation.
  • the side facing away from the first housing part 52 of the second housing part 54 is referred to as the second broad side 55.
  • An attachment side 66 of the installation device 60 is perpendicular to the broad sides 53, 55.
  • the attachment side 66 is configured such that the installation device 60 can be fastened by means of this attachment side 66 to a carrier rail, not shown here, for example a DIN rail.
  • the fastening side 66 opposite side of the installation device 60 is referred to as the front 68.
  • the front side 68 comprises a central area, which is referred to as the front front 70, and two adjacent areas, which are set back relative to the front front 70 and are referred to as the rear front 72.
  • the housing parts 52, 54 are designed so that they form an insertion opening 62 in the region of the first narrow side 74, through which an electrical connection conductor 58 can be inserted into the interior of the housing of the installation device 60.
  • an electrical connection conductor 58 can be inserted into the interior of the housing of the installation device 60.
  • the connecting conductor 58 is inserted through the insertion opening 62 in the connection opening 34 of the terminal frame 14 of the screw 10 and clamped there in a known manner.
  • an insulating member 12 is attached.
  • the insulating member 12 covers the portion of the end face of the terminal frame formed by the second transverse leg and extends downward from the terminal frame, as shown in the downward direction.
  • the housing parts 52, 54 cover the remaining parts of the live terminal frame.
  • no live part of the installation device 60 is visible and touchable from the outside. Due to the expansion of the insulating part 12 away from the terminal frame, in the illustration shown thus down, the insertion opening 62 is additionally reduced in size. Thus, the introduction of objects in the insertion opening 62 is difficult.
  • the extent of the insulating part 12 is particularly dimensioned so that it is prevented to insert a finger through the insertion opening 62 into the installation device 60 into it.
  • live parts in the interior of the installation device 60 which are not visible from the outside, untouchable.
  • the housing parts 52, 54 have in the interior of the housing of the installation device 60 groove-like, parallel to the first narrow side 74 and parallel to the central axis of the clamping screw 64 extending depressions, in which the insulating member 12 slides.
  • the terminal frame is provided for a conductor cross-section of 50 mm 2 .
  • the connected terminal conductor 58 has a relatively small cross section of only 6 mm 2 .
  • the second transverse leg In order to firmly clamp this connection conductor 58, the second transverse leg must therefore be positioned relatively close to the clamping screw of the screw terminal. In the illustration shown, the terminal frame and therefore also the insulating part 12 is thus located relatively high up.
  • This arrangement represents, based on a risk of accidental contact with live parts, a critical situation, since the remaining insertion opening 62 has a maximum size. Without additional measures such as the attachment of an insulating member 12 according to the invention, it would be easily possible to touch the terminal frame with the finger through the insertion opening 62 therethrough.
  • the insulating part 12 in the illustration shown reduces the insertion opening via its web, so that contact is prevented.
  • FIG. 4 is that off Fig. 3 known installation device 60 shown with the housing open.
  • a first housing part 52 receives a screw 10 and a contact strip 56, wherein the screw 10 is arranged on the edge of the first housing part 52.
  • the flat contact strip 56 is positioned so that one end is within the terminal frame 14 of the screw terminal 10, from where the contact strip 56 protrudes into the interior of the housing.
  • the contact strip is mounted fixed relative to the housing halves 52, 54, for example, by being clamped in corresponding grooves which are formed by webs integrally formed on the inside of the housing.
  • the clamping frame 14 is guided lijnsveschietons inside the housing parallel to the longitudinal direction of the first narrow side 74 of the housing.
  • connection conductor 58 is connected to the screw terminal 10.
  • the clamping frame 14 is moved upward in the direction of the rear front side 72, so that the connection conductor 58 is clamped between the contact strip 56 and the second transverse leg 26 of the clamping frame 14.
  • the clamping screw 64 for an operating tool, such as a screwdriver, accessible.
  • test finger 66 In the remaining insertion opening 62 is in the illustration after FIG. 4 a so-called test finger 66 introduced.
  • the test finger 66 has an approximately cylindrical shape with a diameter of, for example, about 12 mm and tapering at the end inserted into the insertion opening 62.
  • test finger 66 abuts the boundary of the insertion opening 62 formed by the first housing part 52 and the insulating part 12. Further insertion of the test finger 66 into the interior of the installation device 60 is not possible.
  • the inserted into the installation device 60 end of the test finger 66 does not touch a live part.
  • said end of the test finger 66 has a predetermined distance from the second transverse leg 26 of the clamp frame 14.
  • the terminal frame 14 is provided for a relatively large conductor cross-section of 50 mm 2 .
  • the connected terminal conductor 58 has a relatively small cross section of only 6 mm 2 .
  • the insulating part 12 is located further down in the illustration shown, whereby the extent of the insertion opening 62 in the direction of the longitudinal axis of the clamping screw 64 is further reduced. In this case, the test finger 66 can not be inserted as deep as shown in the installation device 60.
  • FIG. 5 shows a further embodiment of a screw according to the invention.
  • the same or equivalent parts or assemblies bear the same reference numerals as in the FIG. 1 ,
  • the insulating part 12 according to the FIG. 5 carries no downwardly projecting web, which protrudes in the installed position of the terminal in the insertion opening of the terminal receiving space and reduces this.
  • a cover plate 80 of electrically insulating material which covers the underside of the terminal frame 14, is arranged on the rear side 48 of the insulation part 12.
  • the cover plate 80 is integrally formed in this illustration with the insulating member 12; but it can also be a separate part.
  • the cover plate 80 can be fixed to the terminal frame 14 by means not shown here, for example, snap hooks.
  • cover plate 80 is designed as a separate part, it has in the region adjacent to the insulating part 12 further fastening means for attachment to the terminal frame 14 or on the insulating part 12th
  • no attachment is attached, but the underside of the terminal frame is covered with an insulating film or sprayed with an insulating layer.
  • the insulating part 12 can also carry both the downwardly projecting web, and thus also the cover plate 80. This is then a multiple security against accidental contact with the terminal given.
  • the insulating part 12 can also carry the downwardly projecting web, as in FIG Fig. 1 shown, and the underside of the terminal frame may be covered with an insulating film or splattered with an insulating layer or otherwise covered with an insulating film. This also provides multiple security against accidental contact with the terminal.

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  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP08005633A 2007-04-19 2008-03-26 Borne à vis et appareil d'installation Withdrawn EP1983541A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007018520 2007-04-19
DE102007060077A DE102007060077A1 (de) 2007-04-19 2007-12-13 Schraubklemme und Installationsgerät

Publications (1)

Publication Number Publication Date
EP1983541A1 true EP1983541A1 (fr) 2008-10-22

Family

ID=39619008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08005633A Withdrawn EP1983541A1 (fr) 2007-04-19 2008-03-26 Borne à vis et appareil d'installation

Country Status (1)

Country Link
EP (1) EP1983541A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011044998A1 (fr) 2009-10-17 2011-04-21 Abb Ag Borne à vis à capot et appareil de commutation d'installation
EP2639952A3 (fr) * 2012-03-15 2017-11-29 Rockwell Automation Technologies, Inc. Convertisseur de puissance et sa bobine d'arrêt CC intégrée

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3629796C1 (en) * 1986-09-02 1987-12-10 Phoenix Elekt Electrical series terminal arrangement
FR2601513A1 (fr) * 1986-07-09 1988-01-15 Alsthom Cgee Borne de connexion protegee
WO1995003641A1 (fr) * 1993-07-20 1995-02-02 Bticino S.P.A. Appareil electrique modulaire a protection integree des doigts pour borne de serrage
EP0874433A2 (fr) * 1997-04-21 1998-10-28 Siemens Aktiengesellschaft Dispositif encliquetable sur un rail de support
WO1998053470A1 (fr) * 1997-05-20 1998-11-26 Gewiss S.P.A. Borne electrique a protection contre la decharge
EP1519396A2 (fr) * 2003-09-26 2005-03-30 ABB PATENT GmbH Appareil d'installation électrique
DE10340465A1 (de) * 2003-09-03 2005-05-12 Abb Patent Gmbh Klemmenabdeckteil
WO2005071793A1 (fr) * 2004-01-27 2005-08-04 Moeller Gebäudeautomation KG Borne de connexion a elements relevables
EP1746619A1 (fr) * 2001-03-20 2007-01-24 Moeller Gebäudeautomation GmbH Auxiliaire de serrage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601513A1 (fr) * 1986-07-09 1988-01-15 Alsthom Cgee Borne de connexion protegee
DE3629796C1 (en) * 1986-09-02 1987-12-10 Phoenix Elekt Electrical series terminal arrangement
WO1995003641A1 (fr) * 1993-07-20 1995-02-02 Bticino S.P.A. Appareil electrique modulaire a protection integree des doigts pour borne de serrage
EP0874433A2 (fr) * 1997-04-21 1998-10-28 Siemens Aktiengesellschaft Dispositif encliquetable sur un rail de support
WO1998053470A1 (fr) * 1997-05-20 1998-11-26 Gewiss S.P.A. Borne electrique a protection contre la decharge
EP1746619A1 (fr) * 2001-03-20 2007-01-24 Moeller Gebäudeautomation GmbH Auxiliaire de serrage
DE10340465A1 (de) * 2003-09-03 2005-05-12 Abb Patent Gmbh Klemmenabdeckteil
EP1519396A2 (fr) * 2003-09-26 2005-03-30 ABB PATENT GmbH Appareil d'installation électrique
WO2005071793A1 (fr) * 2004-01-27 2005-08-04 Moeller Gebäudeautomation KG Borne de connexion a elements relevables

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011044998A1 (fr) 2009-10-17 2011-04-21 Abb Ag Borne à vis à capot et appareil de commutation d'installation
DE102009049709A1 (de) 2009-10-17 2011-04-21 Abb Ag Schraubklemme mit Abdeckung und Installationsschaltgerät
EP2639952A3 (fr) * 2012-03-15 2017-11-29 Rockwell Automation Technologies, Inc. Convertisseur de puissance et sa bobine d'arrêt CC intégrée

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