EP0238960B1 - Electric installation equipment - Google Patents

Electric installation equipment Download PDF

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Publication number
EP0238960B1
EP0238960B1 EP87103747A EP87103747A EP0238960B1 EP 0238960 B1 EP0238960 B1 EP 0238960B1 EP 87103747 A EP87103747 A EP 87103747A EP 87103747 A EP87103747 A EP 87103747A EP 0238960 B1 EP0238960 B1 EP 0238960B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
low
installation unit
electrical installation
unit according
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
EP87103747A
Other languages
German (de)
French (fr)
Other versions
EP0238960A1 (en
Inventor
Hermann Dipl.-Ing. Menges
Hermann Schmitt
Walter Schlömer
Horst Von Elm
Erwin Leible
Manfred Fischer
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
ASEA BROWN BOVERI AG
Asea Brown Boveri 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 DE19863610451 external-priority patent/DE3610451A1/en
Priority claimed from DE19863611754 external-priority patent/DE3611754A1/en
Application filed by ASEA BROWN BOVERI AG, Asea Brown Boveri AG Germany filed Critical ASEA BROWN BOVERI AG
Priority to AT87103747T priority Critical patent/ATE71473T1/en
Publication of EP0238960A1 publication Critical patent/EP0238960A1/en
Application granted granted Critical
Publication of EP0238960B1 publication Critical patent/EP0238960B1/en
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
    • H01H73/02—Details
    • H01H73/06—Housings; Casings; Bases; Mountings
    • H01H73/08—Plug-in housings
    • 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
    • H01H2071/088—Terminals for switching devices which make the devices interchangeable, e.g. with fuses
    • 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

Definitions

  • the invention relates to an electrical installation device according to the preamble of claim 1.
  • NH fuses are generally installed in electrical distribution systems. These NH fuses each consist of an NH fuse link and a specially prepared NH fuse base in which it can be inserted with a special handling device.
  • the lower parts normally have an insulating plate as a support plate, to which L-shaped contact angles are attached at a distance from one another.
  • the leg ends which run perpendicular to the insulating material or support plate, carry fork contacts spring-loaded by a ring spring, into the knife contacts located on the NH fuse links be pinched.
  • the parallel to the insulating support plate and the attached legs of the contact angle are designed as contact pieces and provided with clamping screws for connecting supply and discharge conductors.
  • the NH fuses are in turn in a junction box, which is usually sealed.
  • the known NH fuses have fuse links, which after a response, i. H. need to be replaced after melting due to an overcurrent.
  • the connection housing must be opened and its seal must be released.
  • the replacement of the NH fuse links may only be carried out by an authorized specialist, who must also replace the lead seal on the connection housing equipped with the NH fuses. This affects the handling of the NH fuses.
  • connection device for circuit breakers has become known in which the circuit breakers are assigned connection adapters which can be connected to connection terminals arranged on both sides, the shape that the circuit breaker with terminal lugs can be used in the connection terminals. There is no reference to NH fuses in DE-B-26 04 356.
  • the object of the invention is to improve the handling of the NH fuses.
  • an automatic circuit breaker instead of the usual NH fuse link, an automatic circuit breaker is provided, the knife contacts attached to which engage in the fork contact pieces of the NH fuse base.
  • the switch contact located in the circuit breaker opens automatically and thus interrupts the current flow.
  • the switch contact can be closed by hand by operating a switch toggle without having to open the connection housing. This can be done safely by any person, i.e. that is, an approved professional is no longer required in this case.
  • a commercially available circuit breaker can be provided, with clamping screws provided for connecting the current conductors, to which connecting lugs are fastened, which have knife contacts, which can then be inserted into the fork contacts.
  • the connection lugs on the circuit breaker are installed on site by an approved specialist during the initial installation.
  • FIG. 1 shows an NH fuse base 10 for one phase.
  • This lower fuse part 10 has an insulating material carrier 11, on the upper surface of which L-shaped contact angles 12 and 13 are arranged at a distance from one another.
  • the legs of the contact pieces 14 and 15, which run perpendicular to the longitudinal extent of the carrier 11, carry fork contacts 16, 17; these fork contacts 16, 17 are generally known and therefore do not need to be described in detail.
  • the legs 18 and 19 which run parallel to the longitudinal extent of the insulating material carrier 11 carry clamping screws 20 and 21 to which supply and discharge elements (not shown in more detail) can be connected.
  • a circuit breaker 22 are placed, which triggers automatically or can be actuated manually by means of a switching knob 24.
  • the switch toggle 24 is arranged on the front side of the circuit breaker 22 and is shown in FIG. 1 on the right side of the circuit breaker 22 shown in a side view.
  • connecting lugs 26 emerge from the circuit breaker 22, on which knife contact pieces 30, 31 are formed, which engage in the fork contacts 16, 17 of the NH fuse-lower part 10.
  • the connection lugs 26, 28 are each electrically conductively connected to a switch contact (not shown) of the circuit breaker 22, so that a current flows when the switch contacts are closed.
  • the switching knob 26 is actuated or in the case of irregular operating conditions, the circuit breaker 22 trips in a known manner and interrupts the circuit.
  • FIG. 2 shows an arrangement of a novel NH fuse, as is essentially already known from FIG. 1.
  • a circuit breaker 23 is placed, which also trips automatically or can be actuated manually by means of a switching knob 26.
  • the terminals which are not described in any more detail, are designed in a known manner, the terminal bridge being acted upon by two screws.
  • a contact lug 40 is formed at an angle of 90 °, to which a knife contact 31 connects, integrally connected to it.
  • a through bore 42 is provided in the leg 36, the position of which corresponds to a corresponding bore 44 in the housing of the circuit breaker 23. Screws 46 are guided through these mutually aligned bores 42, 44, which are screwed on the side facing the NH lower part by means of nuts 47.
  • the shape of the connecting lugs 28 is dimensionally adapted to the clearance profile of the circuit breaker 23 and lies close to its surface.
  • the outer dimensions of the circuit breaker 23 thereby increase on the narrow sides and on the bottom surface in each case by the thickness of the connecting lugs 28 designed as current conductors.
  • a recess is outlined with hatched lines 48, which receives the connection terminal (not shown in more detail) and the motor space required for fastening the connecting lugs 28.
  • a connecting tab 28 is shown in perspective.
  • the connecting tab 28 is in the form of a U-shaped double bracket made of a flat rod made of conductive material z. B. nickel silver, copper or the like.
  • the upper free leg 34 is provided for connection to the terminals of the circuit breaker 23. For exact adjustment, this leg 34 is set in two steps.
  • a first step 48 serves as a stop against the housing of the circuit breaker, while a second step 50, which is arranged towards the free end, serves as a stop for the connecting terminal.
  • the connecting lug 28 continues at a right angle to the leg 34 in a conductor piece 38. In the installed state, this conductor piece 38 forms the outer boundary of the circuit breaker 23.
  • the length of the conductor piece 38 corresponds to the horizontal distance of the bottom surface 25 of the circuit breaker 23 to its terminal, d. H. the leg 36, which adjoins it at right angles at the lower end of the conductor piece 38, is angled so that it can be inserted tightly into the circuit breaker 23 by hand, but with a certain amount of force in order to bend the resilient legs 34, 36, and already without it further measure maintains its location.
  • the connecting lug 28 is provided with a bore 52 in the leg 36, which runs as an elongated hole in the longitudinal direction of the leg 36 to compensate for tolerances. Aligned with this bore 52, illustrated by the line XX, a further bore 54 is provided in the leg 34, which serves as an assembly opening through which the fastening screws in the bore 52 can be accessed by means of a tool.
  • a contact lug 40 is formed at right angles, to which a knife contact 31 connects, the longitudinal axis of which extends parallel to that of the leg 36 and thus parallel to the longitudinal axis of the circuit breaker 23.
  • the leg 36 is additionally provided with stiffening ribs 56, 58, by means of which the bending stiffness of this arrangement is increased.
  • FIG. 4 shows a cover cap 60 in a perspective view.
  • a rectangular, elongated base plate 62 adapted to the width of the protective switch 23, on the side edges 64 and 65 of which a leg 66 and 67 forming a U are formed; the legs 66, 67 have different lengths; an area 68 with a short leg length is connected via an inclined surface or bevel edge 63 to an area 69 with a longer leg length; this leg length is the side contour of the circuit breaker 23, adapted so that the end edges of the legs 66 and 67 connect exactly to the narrow side surface.
  • a roof part 71 adjoins the upper edge 70 of the base plate 62 at a right angle and continues in a transverse wall 72 which is arranged parallel to the base plate 6.
  • the transverse wall 72 carries a roof-shaped projection 74 which also adjoins it at right angles.
  • the projection 74 projects laterally in some areas and thus forms extensions 76 on both sides, which are interrupted by a transverse slot 77.
  • a coupling part 78 which has two mutually parallel stiffening ribs 80, is placed on the projection 74 symmetrically to an imaginary center line.
  • the free end of the coupling part 78 merges into a crosspiece 82 with a T-shaped attachment 84.
  • the coupling part 78 has a step 86 in its horizontal course, as a result of which a gap 88 is formed between the coupling part 78 and the free end 75 of the projection 74. in which the housing wall of the circuit breaker 23 engages when the cover 60 is snapped open.
  • FIG. 5 shows a side view of the circuit breaker 23 designed according to the invention with covers 60, the course of the connecting lug 28 in cooperation with the cover 60 according to the invention being shown in broken lines in regions.
  • the reference numerals correspond to the features already explained in FIGS. 2 to 4. In this respect, only further details not yet mentioned will be discussed here.
  • a space 29 is delimited by the transverse wall 72 of the cover cap 60, which allows access from above to clamping screws, not shown, when the cover 60 is removed.
  • FIG. 6 shows the view of a narrow side of the arrangement shown in FIG. 5.
  • the projections 76 formed on the roof-shaped projection 74 engage in guide grooves 90 recessed for this purpose in the housing of the circuit breaker 23 and in this way make it possible for forces acting from the direction of arrow P to put on or remove the circuit breaker from the NH Lower fuse part 10 to be transmitted via the coupling part 78.
  • the automatic circuit breaker 22, 23 replaces the fusible link insert previously provided, the current being supplied by means of connecting tabs 26 or connecting tabs 28 provided with knife contacts 30, 31, each of which is electrically conductively connected to the contacts of the circuit breaker 22, 23.
  • NH fuse according to the invention is provided if the existing installation designed with the NH fuse base is to be retained and only the fuse link is to be replaced in order to avoid the effort otherwise required for its future renewal.

Abstract

A low-voltage, high-rupture-capacity (hrc) fuse consists of a low- voltage, hrc fuse lower part (10) and a low-voltage, hrc fuse insert (22, 23), which is designed as an automatic circuit breaker. For this purpose, the commercial circuit breaker (23) is provided with connecting tabs (28) which lead to blade contacts (31) on the rear side of the circuit breaker (23). The blade contacts (31) are inserted in fork contacts (14, 15). A cover (60), which can be snapped onto the circuit breaker (23), is used for protection against touching. Furthermore, the cover (60) is provided with a coupling part (78), which is prepared for an extraction device for commercial low-voltage, hrc fuse inserts to be coupled on. <IMAGE>

Description

Die Erfindung betrifft ein elektrisches Installationsgerät gemaß dem Oberbegriff des Anspruches 1.The invention relates to an electrical installation device according to the preamble of claim 1.

In elektrischen Verteilungsanlagen sind neben Schutzschaltern als Hauptsicherungen bzw. Vorsicherungen im allgemeinen NH-Sicherungen eingebaut. Diese NH-Sicherungen bestehen jeweils aus einem NH-Sicherungseinsatz und einem dafür vorbereiteten NH-Sicherungsunterteil, in welches dieser mit einem speziellen Handhabungsgerät eingesetzt werden kann. Hierzu weisen die Unterteile normalerweise eine Isolierstoffplatte als Tragplatte auf, an der L-förmige Kontaktwinkel im Abstand zueinander befestigt sind. Die senkrecht zur Isolierstoff- bzw. Tragplattte verlaufenden Schenkelenden tragen von einer Ringfeder federnd beaufschlagte Gabelkontakte, in die an den NH-Sicherungseinsätzen befindliche Messerkontakte eingeklemmt werden. Die parallel zu der Isolierstoff-Tragplatte angeordneten und die daran befestigten Schenkel der Kontaktwinkel sind als Kontaktstücke ausgebildet und mit Klemmschrauben versehen, zum Anschluß von Zuund Abführungsleitern. Die NH-Sicherungen befinden sich ihrerseits in einem Ahschlußgehäuse, das üblicherweise plombiert ist.In addition to circuit breakers as main fuses or pre-fuses, NH fuses are generally installed in electrical distribution systems. These NH fuses each consist of an NH fuse link and a specially prepared NH fuse base in which it can be inserted with a special handling device. For this purpose, the lower parts normally have an insulating plate as a support plate, to which L-shaped contact angles are attached at a distance from one another. The leg ends, which run perpendicular to the insulating material or support plate, carry fork contacts spring-loaded by a ring spring, into the knife contacts located on the NH fuse links be pinched. The parallel to the insulating support plate and the attached legs of the contact angle are designed as contact pieces and provided with clamping screws for connecting supply and discharge conductors. The NH fuses are in turn in a junction box, which is usually sealed.

Die bekannten NH-Sicherungen haben Schmelzsicherungseinsätze, die nach einem Ansprechen, d. h. nach dem Schmelzen infolge eines Überstroms ausgetauscht werden müssen. Hierbei ist das Anschlußgehäuse zu öffnen und dabei zwangsläufig seine Plombierung zu lösen.The known NH fuses have fuse links, which after a response, i. H. need to be replaced after melting due to an overcurrent. Here, the connection housing must be opened and its seal must be released.

Gemäß den geltenden Vorschriften darf der Austausch der NH-Sicherungseinsätze nur durch einen zugelassenen Fachmann erfolgen, der auch die Plombierung des mit den NH-Sicherungen ausgestatteten Anschlußgehäuses zu erneuern hat. Hierdurch ist die Handhabung der NH-Sicherungen beeinträchtigt.According to the applicable regulations, the replacement of the NH fuse links may only be carried out by an authorized specialist, who must also replace the lead seal on the connection housing equipped with the NH fuses. This affects the handling of the NH fuses.

Aus der DE-B-26 04 356 ist eine Anschlußvorrichtung für Sicherungsautomaten bekannt geworden, bei der den Leitungsschutzschaltern Anschlußadapter zugeordnet sind, die mit beidseitig angeordneten Anschlußklemmen verbunden werden können, der Gestalt, daß der Leitungsschutzschalter mit Anschlußfahnen in die Anschlußklemmen eingesetzt werden kann. Ein Hinweis auf NH-Sicherungen findet sich in der DE-B-26 04 356 nicht.From DE-B-26 04 356 a connection device for circuit breakers has become known in which the circuit breakers are assigned connection adapters which can be connected to connection terminals arranged on both sides, the shape that the circuit breaker with terminal lugs can be used in the connection terminals. There is no reference to NH fuses in DE-B-26 04 356.

Aufgabe der Erfindung ist es, die Handhabung der NH-Sicherungen zu verbessern.The object of the invention is to improve the handling of the NH fuses.

Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Anspruches 1.This object is achieved according to the invention by the characterizing features of claim 1.

Erfindungsgemäß ist anstelle des üblichen NH-Sicherungseinsatzes ein selbsttätiger Schutzschalter vorgesehen, dessen daran angebrachten Messerkontakte in die Gabelkontaktstücke des NH-Sicherungsunterteils greifen. Im Ansprechfall öffnet der im Schutzschalter befindliche Schaltkontakt selbsttätig und unterbricht so den Stromfluß. Nach Beseitigung der Ansprechursache kann durch Betätigen eines Schaltknebels von Hand der Schaltkontakt geschlossen werden, ohne daß das Anschlußgehäuse geöffnet werden muß. Dies kann ohne Gefahr durch jede Person erfolgen, d. h., ein zugelassener Fachmann wird in diesem Fall nicht mehr benötigt.According to the invention, instead of the usual NH fuse link, an automatic circuit breaker is provided, the knife contacts attached to which engage in the fork contact pieces of the NH fuse base. In the event of a response, the switch contact located in the circuit breaker opens automatically and thus interrupts the current flow. After eliminating the cause of the response, the switch contact can be closed by hand by operating a switch toggle without having to open the connection housing. This can be done safely by any person, i.e. that is, an approved professional is no longer required in this case.

Aus der DE-U-83 34 532 ist eine Abdeckung für Anschlußklemmen eines Leitungsschutzschalters bekannt geworden. Nicht aber ist angegeben, daß diese bekannten Abdeckkappen weitere Aufgaben haben als lediglich die Abdeckung der Anschlußklemmen. Eine Ankopplung einer für handelsübliche NH-Sicherungseinsätze vorgesehenen Abzugsvorrichtung ist nicht möglich.From DE-U-83 34 532 a cover for terminals of a circuit breaker has become known. However, it is not stated that these known cover caps have other functions than merely covering the connection terminals. It is not possible to connect a trigger device intended for standard NH fuse links.

Gemäß einer besonders vorteilhaften Ausgestaltung kann ein handelsüblicher Schutzschalter vorgesehen sein, mit zum Anschluß der Stromleiter vorgesehenen Klemmschrauben, an denen Anschlußfahnen befestigt sind, die Messerkontakte aufweisen, welche dann in die Gabelkontakte eingesetzt werden können. Das Montieren der Anschlußfahnen am Schutzschalter erfolgt hierbei vor Ort durch einen zugelassenen Fachmann bei der Erstmontage.According to a particularly advantageous embodiment, a commercially available circuit breaker can be provided, with clamping screws provided for connecting the current conductors, to which connecting lugs are fastened, which have knife contacts, which can then be inserted into the fork contacts. The connection lugs on the circuit breaker are installed on site by an approved specialist during the initial installation.

Weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind in den Unteransprüchen angegeben.Further advantageous refinements and improvements of the invention are specified in the subclaims.

Anhand der Zeichnung in der ein Ausführungsbeispiel der Erfindung dargestellt ist, soll die Erfindung näher erläutert und beschrieben werden.The invention is to be explained and described in more detail with reference to the drawing in which an exemplary embodiment of the invention is shown.

Es zeigen:

Figur 1
eine Seitenansicht einer Anordnung
Figur 2
eine Seitenansicht einer Anordnung mit Verbindungsfahnen
Figur 3
eine perspektivische Darstellung einer Verbindungsfahne.
Figur 4
eine perspektivische Darstellung einer Abdeckkappe für den Berührungsschutz
Figur 5
eine Seitenansicht auf eine erfindungsgemäße Anordnung mit Berührungsschutz
Figur 6
eine Ansicht auf eine Schmalseite der Anordnung nach Figur 5
Show it:
Figure 1
a side view of an arrangement
Figure 2
a side view of an arrangement with connecting flags
Figure 3
a perspective view of a connecting flag.
Figure 4
a perspective view of a cap for protection against contact
Figure 5
a side view of an arrangement according to the invention with touch protection
Figure 6
a view of a narrow side of the arrangement of Figure 5

Die Figur 1 zeigt ein NH-Sicherungsunterteil 10 für eine Phase. Dieses Sicherungsunterteil 10 besitzt einen Isolierstoffträger 11, an dessen einer oberer Fläche L-förmige Kontaktwinkel 12 und 13 in Abstand zueinander angeordnet sind. Die senkrecht zu der Längserstreckung des Trägers 11 verlaufenden Schenkel der Kontaktstücke 14 und 15 tragen in an sich bekannter Weise Gabelkontakte 16, 17; diese Gabelkontakte 16, 17 sind allgemein bekannt und brauchen daher nicht näher beschrieben zu werden. Die parallel zur Längserstreckung des Isolierstoffträgers 11 verlaufenden Schenkel 18 und 19 tragen Klemmschrauben 20 und 21, an denen Zu- und Abführungselemente (nicht näher dargestellt) angeschlossen werden können. Auf dieses NH-Sicherungsunterteil 10 soll ein Schutzschalter 22 aufgesetzt werden, der selbsttätig auslöst oder mittels eines Schaltknebels 24 von Hand betätigbar ist. Der Schaltknebel 24 ist frontseitig am Schutzschalter 22 angeordnet und in der Figur 1 auf der rechten Seite des in Seitenansicht dargestellten Schutzschalters 22 gezeigt. An der rückseitigen Fläche 25 treten Anschlußfahnen 26 aus dem Schutzschalter 22 heraus, an welchen Messerkontaktstücke 30, 31 angeformt sind, die in die Gabelkontakte 16, 17 des NH-Sicherungsunterteils 10 greifen. Die Anschlußfahnen 26, 28 sind jeweils mit einem nicht gezeigten Schaltkontakt des Schutzschalters 22 elektrisch leitend verbunden, so daß bei geschlossenen Schaltkontakten ein Strom fließt. Bei Betätigungs des Schaltknebel 26 bzw. bei irregulären Betriebsverhältnissen löst der Schutzschalter 22 in bekannter Weise aus und unterbricht den Stromkreis.1 shows an NH fuse base 10 for one phase. This lower fuse part 10 has an insulating material carrier 11, on the upper surface of which L-shaped contact angles 12 and 13 are arranged at a distance from one another. The legs of the contact pieces 14 and 15, which run perpendicular to the longitudinal extent of the carrier 11, carry fork contacts 16, 17; these fork contacts 16, 17 are generally known and therefore do not need to be described in detail. The legs 18 and 19 which run parallel to the longitudinal extent of the insulating material carrier 11 carry clamping screws 20 and 21 to which supply and discharge elements (not shown in more detail) can be connected. On this NH fuse base 10, a circuit breaker 22 are placed, which triggers automatically or can be actuated manually by means of a switching knob 24. The switch toggle 24 is arranged on the front side of the circuit breaker 22 and is shown in FIG. 1 on the right side of the circuit breaker 22 shown in a side view. On the rear surface 25, connecting lugs 26 emerge from the circuit breaker 22, on which knife contact pieces 30, 31 are formed, which engage in the fork contacts 16, 17 of the NH fuse-lower part 10. The connection lugs 26, 28 are each electrically conductively connected to a switch contact (not shown) of the circuit breaker 22, so that a current flows when the switch contacts are closed. When the switching knob 26 is actuated or in the case of irregular operating conditions, the circuit breaker 22 trips in a known manner and interrupts the circuit.

Figur 2 zeigt eine Anordnung einer neuartigen NH-Sicherung, wie sie im wesentlichen bereits aus Fig. 1 bekannt ist.FIG. 2 shows an arrangement of a novel NH fuse, as is essentially already known from FIG. 1.

Auf ein NH-Sicherungsunterteil 10, dessen Ausgestaltung der in Fig. 1 gezeigten identisch entspricht und dessen einzelene Bauteile daher mit den gleichen Bezugsziffern versehen sind, ist ein Schutzschalter 23 aufgesetzt, der ebenfalls selbsttätig auslöst oder mittels Schaltknebel 26 von Hand betätigbar ist.On an NH fuse base 10, the design of which corresponds identically to that shown in FIG. 1 and whose individual components are therefore provided with the same reference numerals, a circuit breaker 23 is placed, which also trips automatically or can be actuated manually by means of a switching knob 26.

Abweichend von der aus Fig. 1 geläufigen Gestaltung ragen beim Schutzschalter 23 aus der Bodenseite 25 keine Anschlußfahnen heraus. Stattdessen sind U-förmig abgewinkelte Verbindungsfahnen 28 vorgesehen, die mit einem Schenkel 34 in die nicht näher gezeigten Anschlußklemmen des Schutzschalters einführbar sind.In contrast to the design familiar from FIG. 1, no connecting lugs protrude from the bottom side 25 of the circuit breaker 23. Instead, U-shaped angled connecting lugs 28 are provided, which can be inserted with a leg 34 into the connection terminals of the circuit breaker (not shown in more detail).

Die nicht näher bezeichneten Anschlußklemmen sind in bekannter Weise ausgebildet, wobei die Klemmbrücke von zwei Schrauben beaufschlagt ist.The terminals, which are not described in any more detail, are designed in a known manner, the terminal bridge being acted upon by two screws.

An seinem parallelen Schenkel 36, der gemeinsam mit einem hierzu senkrecht angeordneten Leiterstück 38 die U-förmig abgewinkelte Verbindungsfahne 28 bildet, ist unter einem Winkel von 90° eine Kontaktfahne 40 angeformt, an welche, einstückig mit ihr verbunden, ein Messerkontakt 31 anschließt.On its parallel leg 36, which, together with a conductor piece 38 arranged perpendicularly thereto, forms the U-shaped angled connecting lug 28, a contact lug 40 is formed at an angle of 90 °, to which a knife contact 31 connects, integrally connected to it.

Um die Verbindungsfahnen 28 mit dem Schutzschalter 23 mechanisch zu verbinden, ist im Schenkel 36 eine Durchgangsbohrung 42 vorgesehen, deren Lage sich mit einer entsprechenden Bohrung 44 im Gehäuse des Schutzschalters 23 deckt. Durch diese miteinander fluchtenden Bohrungen 42, 44 sind Schrauben 46 geführt, die auf der dem NH-Unterteil zugewandten Seite mittels Muttern 47 verschraubt sind. Durch diese Befestigung am Gehäuse des Schutzschalters 23 sind die Anschlußklemmen des Schutzschalters 23 mechanisch entlastet.In order to mechanically connect the connecting lugs 28 to the circuit breaker 23, a through bore 42 is provided in the leg 36, the position of which corresponds to a corresponding bore 44 in the housing of the circuit breaker 23. Screws 46 are guided through these mutually aligned bores 42, 44, which are screwed on the side facing the NH lower part by means of nuts 47. By this attachment to the housing of the circuit breaker 23, the terminals of the circuit breaker 23 are mechanically relieved.

Die Verbindungsfahnen 28 sind in ihrer Formgebung maßlich dem Lichtraumprofil des Schutzschalters 23 angepaßt und legen sich dicht an dessen Oberfläche an. Die Außenabmessungen des Schutzschalters 23 erhöhen sich dadurch an den Schmalseiten und an der Bodenfläche jeweils um die Dicke der als Stromleiter ausgebildeten Verbindungsfahnen 28.The shape of the connecting lugs 28 is dimensionally adapted to the clearance profile of the circuit breaker 23 and lies close to its surface. The outer dimensions of the circuit breaker 23 thereby increase on the narrow sides and on the bottom surface in each case by the thickness of the connecting lugs 28 designed as current conductors.

Gemäß der Erfindung kann vorgesehen sein, diesen maßlichen Überstand zu eliminieren, indem die Verbindungsfahnen in entsprechende Ausnehmungen am Gehäuse des Schutzschalters 23 versenkt sind.According to the invention, it can be provided to eliminate this overhang in size by the connecting lugs being sunk into corresponding recesses on the housing of the circuit breaker 23.

Mit schraffierten Linien 48 ist eine Ausnehmung umrissen, welche die nicht näher gezeigte Anschlußklemme aufnimmt und den zur Befestigung der Verbindungsfahnen 28 erforderlichen Motageraum.A recess is outlined with hatched lines 48, which receives the connection terminal (not shown in more detail) and the motor space required for fastening the connecting lugs 28.

In Fig. 3 ist eine Verbindungsfahne 28 in perspektivischer Darstellung gezeigt. Wie bereits aus Fig. 2 bekannt, ist die Verbindungsfahne 28 in Form eines U-förmigen Doppelwinkels aus einem Flachstab aus leitendem Material z. B. Neusilber, Kupfer o. ä., geformt.In Fig. 3, a connecting tab 28 is shown in perspective. As already known from Fig. 2, the connecting tab 28 is in the form of a U-shaped double bracket made of a flat rod made of conductive material z. B. nickel silver, copper or the like.

Der obere freie Schenkel 34 ist vorgesehen zum Anschluß an den Anschlußklemmen des Schutzschalters 23. Zur exakten Justierung ist dieser Schenkel 34 zweifach stufenförmig angesetzt.The upper free leg 34 is provided for connection to the terminals of the circuit breaker 23. For exact adjustment, this leg 34 is set in two steps.

Eine erste Stufe 48 dient als Anschlag gegen das Gehäuse des Schutzschalters, während eine zweite, zum freien Ende hin angeordnete Stufe 50 als Anschlag für die Anschlußklemme dient.A first step 48 serves as a stop against the housing of the circuit breaker, while a second step 50, which is arranged towards the free end, serves as a stop for the connecting terminal.

Mit Hilfe der Stufen 48, 50 wird die Montage der Verbindungsfahne 28 am Schutzschalter 23 beträchtlich vereinfacht, da hierdurch die Verbindungsfahne 28 ohne weiteren Justieraufwand beim Einsetzen richtig positioniert wird.With the aid of the steps 48, 50, the assembly of the connecting lug 28 on the circuit breaker 23 is considerably simplified, since the connecting lug 28 is thereby correctly positioned without any further adjustment effort when it is inserted.

Im rechten Winkel zum Schenkel 34 setzt sich die Verbindungsfahne 28 in einem Leiterstück 38 fort. Im eingebauten Zustand bildet dieses Leiterstück 38 die äußere Begrenzung des Schutzschalters 23.The connecting lug 28 continues at a right angle to the leg 34 in a conductor piece 38. In the installed state, this conductor piece 38 forms the outer boundary of the circuit breaker 23.

Die Länge des Leiterstücks 38 entspricht dem horizontalen Abstand der Bodenfläche 25 des Schutzschalters 23 zu seiner Anschlußklemme, d. h. der Schenkel 36, der am unteren Ende des Leiterstücks 38 daran rechtwinklig anschließt, ist so abgewinkelt, daß er sich von Hand, jedoch mit gewissem Kraftaufwand, um die rückfedernden Schenkel 34, 36 aufzubiegen, stramm in den Schutzschalter 23 einsetzen läßt und bereits so ohne weitere Maßnahme seine Lage beibehält.The length of the conductor piece 38 corresponds to the horizontal distance of the bottom surface 25 of the circuit breaker 23 to its terminal, d. H. the leg 36, which adjoins it at right angles at the lower end of the conductor piece 38, is angled so that it can be inserted tightly into the circuit breaker 23 by hand, but with a certain amount of force in order to bend the resilient legs 34, 36, and already without it further measure maintains its location.

Dennoch ist als zusätzliche Sicherung zur Lagefixierung vorgesehen, die Verbindungsfahne 28 mittels Schraubverbindung am Gehäuse des Schutzschalters 23 zu befestigten. Hierzu ist die Verbindungsfahne 28 mit einer Bohrung 52 im Schenkel 36 versehen, die zum Ausgleich von Toleranzen als Langloch in Längsrichtung des Schenkels 36 verläuft. Mit dieser Bohrung 52 fluchtend, verdeutlicht durch die Linie XX, ist im Schenkel 34 eine weitere Bohrung 54 vorgesehen, die als Montageöffnung dient, durch welche mittels Werkzeug die Befestigungsschrauben in der Bohrung 52 zugänglich sind.Nevertheless, it is provided as an additional securing means for fixing the position that the connecting lug 28 is fastened to the housing of the circuit breaker 23 by means of a screw connection. For this purpose, the connecting lug 28 is provided with a bore 52 in the leg 36, which runs as an elongated hole in the longitudinal direction of the leg 36 to compensate for tolerances. Aligned with this bore 52, illustrated by the line XX, a further bore 54 is provided in the leg 34, which serves as an assembly opening through which the fastening screws in the bore 52 can be accessed by means of a tool.

An das freie Ende des Schenkels 26 ist eine Kontaktfahne 40 im rechten Winkel angeformt, an die ein Messerkontakt 31 anschließt, dessen Längsachse parallel zu der des Schenkels 36 und damit parallel zur Längsachse des Schutzschalters 23 verläuft.At the free end of the leg 26, a contact lug 40 is formed at right angles, to which a knife contact 31 connects, the longitudinal axis of which extends parallel to that of the leg 36 and thus parallel to the longitudinal axis of the circuit breaker 23.

Zur Verstärkung der Verbindungsfahne 28 ist der Schenkel 36 zusätzlich mit Versteifungsrippen 56, 58 versehen, durch welche die Biegesteifigkeit dieser Anordnung erhöht wird.To strengthen the connecting lug 28, the leg 36 is additionally provided with stiffening ribs 56, 58, by means of which the bending stiffness of this arrangement is increased.

Die Figur 4 zeigt eine Abdeckkappe 60 in perspektivischer Darstellung. Man erkennt eine der Breite des Schutzschalters 23 angepaßte rechteckige, langgestreckte Grundplatte 62, an deren Seitenkanten 64 und 65 ein U bildende Schenkel 66 und 67 angeformt sind; die Schenkel 66, 67 besitzen unterschiedliche Länge; ein Bereich 68 mit kurzer Schenkellänge ist über eine Schrägfläche bzw. Schrägkante 63 mit einem Bereich 69 mit längerer Schenkellänge verbunden; diese Schenkellänge ist der Seitenkontur des Schutzschalters 23, so angepaßt, daß die Endkanten der Schenkel 66 und 67 genau an die Schmalseitenfläche anschließen.FIG. 4 shows a cover cap 60 in a perspective view. One recognizes a rectangular, elongated base plate 62 adapted to the width of the protective switch 23, on the side edges 64 and 65 of which a leg 66 and 67 forming a U are formed; the legs 66, 67 have different lengths; an area 68 with a short leg length is connected via an inclined surface or bevel edge 63 to an area 69 with a longer leg length; this leg length is the side contour of the circuit breaker 23, adapted so that the end edges of the legs 66 and 67 connect exactly to the narrow side surface.

An der oberen Kante 70 der Grundplatte 62 schließt rechtwinklig ein Dachteil 71 an, das sich in einer Querwand 72, die parallel zur Grundplatte 6 angeordnet ist, fortsetzt. Die Querwand 72 trägt einen dachförmigen Vorsprung 74, der sich ebenfalls rechtwinklig daran anschließt.A roof part 71 adjoins the upper edge 70 of the base plate 62 at a right angle and continues in a transverse wall 72 which is arranged parallel to the base plate 6. The transverse wall 72 carries a roof-shaped projection 74 which also adjoins it at right angles.

Der Vorsprung 74 steht bereichsweise seitlich über und bildet so beiderseits Fortsätze 76, die von einem Querschlitz 77 unterbrochen sind.The projection 74 projects laterally in some areas and thus forms extensions 76 on both sides, which are interrupted by a transverse slot 77.

Symmetrisch zu einer gedachten Mittellinie ist auf den Vorsprung 74 ein Kupplungsteil 78 aufgesetzt, das zwei zueinander parallele Versteifungsrippen 80 besitzt. Das freie Ende des Kupplungsteils 78 geht über in einen Quersteg 82 mit T-förmigen Aufsatz 84. Das Kupplungsteil 78 weist in seinem horizontalen Verlauf eine Stufe 86 auf, wodurch zwischen dem Kupplungsteil 78 und dem freien Ende 75 des Vorsprungs 74 ein Spalt 88 entsteht, in welchen die Gehäusewand des Schutzschalters 23 beim Aufschnappen der Abdeckung 60 eingreift.A coupling part 78, which has two mutually parallel stiffening ribs 80, is placed on the projection 74 symmetrically to an imaginary center line. The free end of the coupling part 78 merges into a crosspiece 82 with a T-shaped attachment 84. The coupling part 78 has a step 86 in its horizontal course, as a result of which a gap 88 is formed between the coupling part 78 and the free end 75 of the projection 74. in which the housing wall of the circuit breaker 23 engages when the cover 60 is snapped open.

In Figur 5 ist der erfindungsgemäß ausgestaltete Schutzschalter 23 mit Abdeckungen 60 in Seitenansicht wiedergegeben, wobei bereichsweise gestrichelt der Verlauf der Verbindungsfahne 28 im Zusammenwirken mit der erfindunsgemäßen Abdeckung 60 gezeigt ist. Die Bezugsziffern entsprechen den bereits in Figur 2 bis 4 erläuterten Merkmalen. Insoweit soll hier nur noch auf weitere noch nicht erwähnte Einzelheiten eingegangen werden. Durch die Querwand 72 der Abdeckkappe 60 wird ein Raum 29 begrenzt, welcher von oben Zugang gewährt zu nicht näher dargestellten Klemmschrauben, wenn die Abdeckung 60 abgenommen ist.FIG. 5 shows a side view of the circuit breaker 23 designed according to the invention with covers 60, the course of the connecting lug 28 in cooperation with the cover 60 according to the invention being shown in broken lines in regions. The reference numerals correspond to the features already explained in FIGS. 2 to 4. In this respect, only further details not yet mentioned will be discussed here. A space 29 is delimited by the transverse wall 72 of the cover cap 60, which allows access from above to clamping screws, not shown, when the cover 60 is removed.

In Figur 6 ist die Ansicht einer Schmalseite der in Figur 5 gezeigten Anordnung dargestellt. Bei dieser Darstellung wird besonders deutlich, wie die am dachförmigen Vorsprung 74 angeformten Fortsätze 76 in hierfür im Gehäuse des Schutzschalters 23 eingelassene Führungsnuten 90 greifen und auf diese Weise ermöglichen, aus Richtung des Pfeiles P angreifende Kräfte zum Aufsetzen bzw. Abziehen des Schutzschalters vom NH-Sicherungsunterteil 10 über das Kupplungsteil 78 zu übertragen.FIG. 6 shows the view of a narrow side of the arrangement shown in FIG. 5. In this illustration it is particularly clear how the projections 76 formed on the roof-shaped projection 74 engage in guide grooves 90 recessed for this purpose in the housing of the circuit breaker 23 and in this way make it possible for forces acting from the direction of arrow P to put on or remove the circuit breaker from the NH Lower fuse part 10 to be transmitted via the coupling part 78.

Gemäß der Erfindung ersetzt der selbsttätige Schutzschalter 22, 23 den bisher vorgesehenen Schmelzsicherungseinsatz, wobei die Stromzuführung mittels mit Messerkontakten 30, 31 versehenen Anschlußfahnen 26 bzw. Verbindungsfahnen 28 erfolgt, die jeweils mit den Kontakten des Schutzschalters 22, 23 elektrisch leitend verbunden sind.According to the invention, the automatic circuit breaker 22, 23 replaces the fusible link insert previously provided, the current being supplied by means of connecting tabs 26 or connecting tabs 28 provided with knife contacts 30, 31, each of which is electrically conductively connected to the contacts of the circuit breaker 22, 23.

Der Einsatz der erfindungsgemäßen NH-Sicherung ist vorgesehen, wenn die vorhandene mit NH-Sicherungsunterteil ausgestaltete Installation beibehalten werden soll und lediglich der Schmelzsicherungseinsatz ersetzt werden soll, um den sonst erforderlichen Aufwand bei dessen künftiger Erneuerung zu vermeiden.The use of the NH fuse according to the invention is provided if the existing installation designed with the NH fuse base is to be retained and only the fuse link is to be replaced in order to avoid the effort otherwise required for its future renewal.

Claims (9)

  1. Electrical installation unit, which is used as a low-voltage, high rupture capacity fuse, also known as a low-voltage HRC fuse, having a low-voltage HRC fuse lower part (10) and a low-voltage HRC fuse insert (22, 23) which can be connected to the low-voltage HRC fuse lower part (10), characterised in that the low-voltage HRC fuse insert (22, 23) is an automatic circuit breaker having blade contacts (30, 31) which are integrally formed on connecting tabs (26, 40) and can be plugged into fork contact pieces (16, 17) on the low-voltage HRC fuse lower part (10), in that a covering cap (60) is in each case snapped onto each narrow side of the circuit breaker (23), running at right angles to the connecting line of the fork contact pieces, on which covering cap (60) there is integrally formed a coupling part (78) which, with the covering cap (60) snapped on, allows a trigger mechanism provided for commercial low-voltage HRC fuse inserts to be coupled on, each covering cap at the same time being used to provide protection against touching.
  2. Electrical installation unit according to Claim 1, characterised in that the circuit breaker is fitted with connecting tabs (28) which are arranged on its narrow sides and are connected at one end in each case to a connecting terminal of the circuit breaker (23), and at their other end a connecting tab (40) with the integrally formed blade contact (sic) (31) is provided in each case.
  3. Electrical installation unit according to Claim 2, characterised in that the connecting tabs (28) are inserted in cut-outs provided for this purpose on the narrow sides and in the base surface (25) of the circuit breaker.
  4. Electrical installation unit according to Claim 2, characterised in that the connecting tabs (28) are in each case formed from a flat rod into a double angle, on the one limb (36) of which there is a connecting tab (40), connected at right-angles, on which a blade contact (31) is integrally formed.
  5. Electrical installation unit according to one of the preceding claims, characterised in that the other limb (34) of the connecting tab (28) designed as a double angle tapers in two steps (46, 50) towards its free end, and in that one of the steps (46, 50) is used as a stop against the housing of the circuit breaker (23) or against a connecting terminal of the circuit breaker (23).
  6. Electrical installation unit according to one of the preceding claims, characterised in that the limbs (34, 36) of the connecting tab (28) are provided with through-holes (52, 54) which are used for the mechanical attachment of the connecting tab (28) to the housing of the circuit breaker (23), the hole (52) (sic) let into the limb (36) with the blade contact (31) being designed as an oblong hole, the longitudinal axis of which runs in the same direction as that of the limb (36) and holds a through-screw (48), and the hole (54) located in the other limb (34) being used as a mounting hole for an operating tool.
  7. Electrical installation unit according to one of the preceding claims, characterised in that the limb (36) of the connecting tab (28) provided with the blade contact (31) has reinforcing ribs (56, 58) for increasing the flexural stiffness.
  8. Electrical installation unit according to one of the preceding claims, characterised in that each covering cap (60) is used at the same time to provide protection against touching for the connecting tabs (28), and covers the latter.
  9. Electrical installation unit according to one of the preceding claims, characterised in that each terminal holding space has two mutually opposite slots (90), facing one another, which hold side formations (76) of a covering cap (60) for guiding the latter.
EP87103747A 1986-03-27 1987-03-14 Electric installation equipment Expired - Lifetime EP0238960B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87103747T ATE71473T1 (en) 1986-03-27 1987-03-14 ELECTRICAL INSTALLATION EQUIPMENT.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3610451 1986-03-27
DE19863610451 DE3610451A1 (en) 1986-03-27 1986-03-27 Electrical installation apparatus
DE3611754 1986-04-08
DE19863611754 DE3611754A1 (en) 1986-04-08 1986-04-08 Low-voltage high-rupture-capacity fuse (NH fuse)

Publications (2)

Publication Number Publication Date
EP0238960A1 EP0238960A1 (en) 1987-09-30
EP0238960B1 true EP0238960B1 (en) 1992-01-08

Family

ID=25842414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103747A Expired - Lifetime EP0238960B1 (en) 1986-03-27 1987-03-14 Electric installation equipment

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EP (1) EP0238960B1 (en)
AT (1) ATE71473T1 (en)
DE (1) DE3775800D1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013803A1 (en) * 1990-04-28 1991-10-31 Jung Gmbh Albrecht Cover frame for wall mounted electrical installation device - has slot in side element of frame receiving printed identification card
GB9511278D0 (en) * 1995-06-05 1995-08-02 Square D Co Improvements in and relating to circuit breakers
EP0748018A3 (en) * 1995-06-05 1998-06-24 Square D Company Adaptor for circuit breaker
AT404646B (en) * 1995-06-20 1999-01-25 Felten & Guilleaume Ag Oester DEVICE FOR PREVENTING TOUCHING TERMINALS OF SWITCHGEAR
DE19632726A1 (en) * 1996-08-14 1998-02-19 Abb Patent Gmbh Electrical circuit breaker mountable on lower part of low-voltage/high-power fuse
FR2774506B1 (en) * 1998-02-05 2002-12-13 Cahors App Elec PROTECTION DEVICE FOR LOW VOLTAGE DISTRIBUTION NETWORKS
WO2001029856A1 (en) * 1999-10-18 2001-04-26 Abb Patent Gmbh Electrical installation switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344394A (en) * 1966-05-16 1967-09-26 Zinsco Electrical Products Limited engagement lug assembly
US3437970A (en) * 1966-09-07 1969-04-08 Ite Circuit Breaker Ltd Circuit breaker device including simplified housing assembly and external contacts
DE2604356C3 (en) * 1976-02-05 1979-08-02 Brown, Boveri & Cie Ag, 6800 Mannheim Connection device for circuit breakers
DE8334532U1 (en) * 1983-12-01 1985-02-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Cover for exposed connection terminals of switching devices
DE3437802A1 (en) * 1984-10-16 1986-04-17 Horst von 2900 Oldenburg Elm Adapter for main automatic cut-outs

Also Published As

Publication number Publication date
ATE71473T1 (en) 1992-01-15
DE3775800D1 (en) 1992-02-20
EP0238960A1 (en) 1987-09-30

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