EP0727091B1 - Overvoltage protection device - Google Patents

Overvoltage protection device Download PDF

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Publication number
EP0727091B1
EP0727091B1 EP94921523A EP94921523A EP0727091B1 EP 0727091 B1 EP0727091 B1 EP 0727091B1 EP 94921523 A EP94921523 A EP 94921523A EP 94921523 A EP94921523 A EP 94921523A EP 0727091 B1 EP0727091 B1 EP 0727091B1
Authority
EP
European Patent Office
Prior art keywords
rocker
casing
ram
web
guide
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
EP94921523A
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German (de)
French (fr)
Other versions
EP0727091A1 (en
Inventor
Ernst Hammermayer
Herbert Ettlinger
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.)
Felten and Guilleaume Austria AG
Original Assignee
Felten and Guilleaume Austria AG
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Publication date
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Publication of EP0727091A1 publication Critical patent/EP0727091A1/en
Application granted granted Critical
Publication of EP0727091B1 publication Critical patent/EP0727091B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/10—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
    • H01H2037/763—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts the spring being a blade spring

Definitions

  • the invention relates to an overvoltage protection device with two or more protective elements, which are accommodated in a housing and are designed as varistors, the electrodes on the earth line side of which are electrically conductively connected to one another by a strip with a contact piece, the other electrodes on the network side being connected to the protective elements in series with separating devices with contact pieces are connected.
  • the invention has for its object to improve known devices of the type mentioned and to simplify the design without adversely affecting the protective properties.
  • FIG. 2 shows the combination of block arrester and device base of FIG. 1 from the side
  • Fig. 14 is a side view of the rocker.
  • the information “top”, “bottom”, “front”, “rear” relates to the orientation of the device base 1 and the insert element 2 locked in this in FIGS. 1 and 2, in which, for example, an overvoltage protection device is housed.
  • the device base 1 is essentially U-shaped in cross-section (FIG. 2), a device consisting of a hook-like extension 3 and a spring-loaded snap slide 4 being provided on the rear (ie “rear”), via which the device base 1 , as is known per se, can be snapped onto, for example, a mounting rail mounted in a control cabinet.
  • connection terminals 6 for three outer conductors and a connection terminal 6 'for the neutral conductor are accommodated, the design of which can be seen in more detail in FIGS. 5 and 6.
  • connection terminal 8 for the earth line and two auxiliary contact terminals 9 and 10 for an integrated auxiliary switch (make contact) are accommodated.
  • each contact terminal 6, 6 'and 8 is a contact angle 11 with which a resilient contact 12 is connected.
  • the contacts 12 protrude from the legs 5 and 7 in the web of the device base 1.
  • the free ends of the contacts 12 are pressed forward by contact springs 13, that is, into the space between the two legs 5 and 7 of the device base 1.
  • a leaf spring 17 is connected, which can be bent in a manner to be described in more detail below by an actuating pin 37 in contact with the auxiliary contact terminal 10, so that the auxiliary contact terminals 9 and 10 are electrically conductively connected to one another.
  • the contacts 12 are accessible through openings 18 in the forward-facing middle part 19 of the housing cover 20 which closes the device base 1 on the inside (FIGS. 3 and 4).
  • a slot 27 open to the inside thereof is provided, through which the contact spring 17 is accessible.
  • the insert element 2 has a housing comprising a cover 30 and a trough 31.
  • a contact 33 and four contacts 34 protrude through the bottom of the housing cover 30 in the position of use, which contacts through the openings 18 in the wall part 19 of the housing cover 20 of the device base 1 the contacts 12 of the contact terminal 8 for the ground line, the contacts 12 of the three contact terminals 6 for the outer conductor and the contact terminal 6 'for the neutral conductor rest when the insert element 2, as shown in FIGS. 1 and 2, with the device base 1 is locked.
  • a projecting rib 35 is provided, which engages in the slot 27 when the insert element 2 is inserted in the device base 1, so that only a correct mounting of the insert element 2 on the device base 1 is possible.
  • the actuating pin 37 projects, which interacts with the contact spring 17 in the device base 1 in a manner to be described.
  • each snap arm 40 On the cover 30 of the housing of the insert element 2, two snap arms 40 are provided which are made in one piece with it, which engage in corresponding recesses in the side walls of the trough 31 of the housing of the insert element 2.
  • Each snap arm 40 carries an outwardly facing actuating projection 41 and two likewise outwardly facing latching lugs 42, which engage behind the latching projections 25 of the device base 1 when the insert element 2 is locked with the device base 1, as shown in FIG. 2.
  • the actuating projections 41 are easily accessible thanks to the recessed handles 23, 24.
  • the recessed handles 23, 24 in the installation position that is to say when the combination of device base 1 and insert element 2 is mounted in a switch box, are covered by a panel, ie are not readily accessible. Unauthorized handling is at least hampered.
  • tongues 45 are formed on the cover 30, which at their free ends have locking projections (not visible) which point inwards.
  • the tongues 45 are received in grooves 46 in the outer sides of the two longitudinal walls of the tub 31, their latching projections engaging in holes 47 when the lid 30 is placed on the tub 31.
  • the holes 47 are provided at the rear ends of the grooves 46.
  • the inner structure of the insert element 2 designed as a surge protection device is described below with reference to FIGS. 9 to 14.
  • each protective element 51 in the form of metal oxide varistors is accommodated in the trough 31 in a receiving space which is separated on one side by a wall 50.
  • Each protective element 51 is inserted into its own receiving space, the receiving spaces being separated from one another by partition walls 52.
  • conductive electrodes 53, 54 On both sides of the protective elements 51 are electrical with them conductive electrodes 53, 54 connected.
  • the arrangements of protective element 51 and the two electrodes 53, 54 are fixed in their receiving spaces by a (polyurethane) potting compound 55.
  • the partition walls 52 are formed in the invention only so long that they end below the upper edge 56 of the tub 31.
  • the electrodes 54 are electrically conductively connected to a common conductor rail 58 which leads into the contact 33 (see FIG. 9).
  • the electrodes 54 form the “ground side” of the protective elements 51.
  • Each separating device consists of a plunger in the form of a tubular rivet 60, which is soldered to a flag of the electrodes 53 by means of soft solder 61.
  • An insulating piece 100 is fixed to an angled part 63 of the electrode 53, a sleeve-shaped part of the insulating piece 100 serving as a guide for the tubular rivet 60 and slidably receiving the tubular rivet 60 therein.
  • a helical compression spring 62 is inserted over the insulating piece 100 as a release spring and is inserted between the widened end of the insulating piece 100 fastened to the angled part 63 of the electrode 53 and a contact plate 64 with pretension.
  • the contact plate 64 lies with its side facing away from the helical compression spring 62 against a collar 65 provided at the end of the tubular rivet 60.
  • a flexible conductor cable 66 is connected to the contact plate 64 in an electrically conductive manner, e.g. welded, which leads to the respective contact 34.
  • a rocker is also pivotable in the insert element 2 70 stored, which is shown in Figs. 13 and 14 by itself.
  • the rocker 70 is designed as an essentially U-shaped bracket and has a bearing journal 73, 74 on each of its two legs 71, 72.
  • the bearing journals 73, 74 are in bearing seats 75, 76 on the narrow walls of the tub 31 about an axis 77 ' pivoted.
  • lugs 78 are provided, which are assigned with their hemispherically curved front sides 79 to the end of the tubular rivet 60 having the collar 65.
  • the aforementioned actuating pin 37 is also slidably mounted.
  • the actuating pin 37 has a thickened end 80 which engages in a recess 81 on the end of the web 77 of the rocker 70 which carries the longer leg 72.
  • a return spring 83 is inserted, which holds the actuating pin 37 in contact with the web 77 of the rocker 70.
  • solder joint 61 which connects the tubular rivet 60 to the angled part 63 of the lug of the electrode 53, is brought to a certain temperature, this solder joint 61 opens and the tubular rivet 60 is driven by the helical compression spring (release spring) 62, by the angled part 63 of the electrode 53 moves away and is guided in the insulating piece 100 during this movement.
  • This insulating piece 100 also ensures the insulation between the angled part 63 of the electrode 53 and the release spring 62 after a release, ie a disconnection process.
  • this disconnection process creates an air gap of, for example, 5 mm between the angled part 63 of the electrode 53 and the tubular rivet 60, so that the necessary dielectric strength is ensured.
  • the free end of the longer leg 72 of the rocker 70 serves as a display device for all pole sections of the overvoltage protection device.
  • the viewing window 39 in the bottom of the tub 31 pointing forward in the position of use (FIGS. 1 and 2), either the green-colored end face 90 of the leg 72 or the red-colored end face 91 of a pointer 92, which, as shown in FIG. 14 or 12 can be seen, is locked with the free end of the longer leg 74 of the rocker 70, visible.
  • the display which is visible in the viewing window 39 changes from green (end surface 90) to red (end surface 91) and thus indicates that an exchange of the insert element 2 is necessary.
  • test contacts 95 are provided, which are connected to an outer conductor (the upper test contact 95 in FIG. 10) or to earth (the lower test contact 95 in FIG. 10). As mentioned, the test contacts 95 are accessible through the openings 38 which are closed with plastic domes and which are likewise provided in the base of the trough 31.
  • the invention can be represented as follows, for example:
  • An overvoltage protection device 2 has a plurality of varistors 51 accommodated in a housing, the electrodes of which on the ground line side are electrically conductive with one another via a strip 58 are connected.
  • the network-side electrodes 53 of the varistors are connected to contact pieces 34 via disconnection devices 60, 61.
  • the separating devices consist of a plunger designed as a tubular rivet 60, which is connected to the electrodes 53 via a soft soldering point 61.
  • the plunger 61 is slidably received in a guide 100 made of insulating material.
  • Each of the plungers 60 cooperates with one of its ends with a rocker (70) which is common to all disconnection devices and which can be pivoted in the overvoltage protection device.
  • the soft solder connection 61 opens and the plunger 60 in question is pivoted, driven by a tripping spring 62, the rocker 70, which in turn displaces an actuating pin 37 so that further switching operations are triggered.
  • the rocker 70 also carries a display device 90, 91, which is visible through a window in the housing of the surge protection device (2), so that it can be seen from the outside that one of the disconnection devices 60, 61 has triggered.
  • the fact that a single rocker 70 is assigned to all disconnection devices results in a simple construction of the overvoltage protection device.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Thermistors And Varistors (AREA)
  • Fuses (AREA)
  • Amplifiers (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

An overvoltage protection device (2) has a plurality of varistors (51) fitted in a housing, whose earth electrodes are electrically interconnected via a strip (58). The mains electrodes (53) of the varistors are connected to contacts (34) via separators (60, 61). The separators consist of a push-rod in the form of a tubular rivet (60) connected to the electrodes (53) via a soft-soldered point (61). The push-rod (60) can move in a guide (100) of insulating material. One end of each push-rod (60) act together with a rocker (70) shared by all the separators which can pivot in the overvoltage protection device. On triggering, i.e. when one of the varistors (51) is overloaded, the soft-soldered connection (61) opens and the push-rod (60) concerned, actuated by a release spring (62), pivots the rocker (70) so that further switching operations are triggered. The rocker (70) also bears an indicating device (90, 91) visible through a window in the housing of the overvoltage protecting device (2), making it possible to see from outside that one of the separators (60, 61) has been triggered. As a single rocker (70) is allocated to all the separators, the design of the overvoltage protecting device is simple.

Description

Die Erfindung betrifft eine Überspannungsschutzvorrichtung mit zwei oder mehreren in einem Gehäuse untergebrachten, als Varistoren ausgebildeten Schutzelementen, deren erdleitungsseitigen Elektroden durch eine Leiste mit einem Kontaktstück elektrisch leitend miteinander verbunden sind, wobei die anderen, netzseitigen Elektroden über in Serie zu den Schutzelementen geschaltete Abtrennvorrichtungen mit Kontaktstücken verbunden sind. (DE-A-3 805 890)The invention relates to an overvoltage protection device with two or more protective elements, which are accommodated in a housing and are designed as varistors, the electrodes on the earth line side of which are electrically conductively connected to one another by a strip with a contact piece, the other electrodes on the network side being connected to the protective elements in series with separating devices with contact pieces are connected. (DE-A-3 805 890)

Der Erfindung liegt die Aufgabe zugrunde, bekannte Vorrichtungen der eingangs genannten Gattung zu verbessern und konstruktiv zu vereinfachen, ohne daß die Schutzeigenschaften nachteilig beeinträchtigt werden.The invention has for its object to improve known devices of the type mentioned and to simplify the design without adversely affecting the protective properties.

Gelöst wird diese Aufgabe dadurch, daß alle Abtrennvorrichtungen im Schwenkbereich des Steges eines im Gehäuse verschwenkbar gelagerten, im wesentlichen U-förmigen, als Wippe ausgebildeten Bügels angeordnet sind, und daß am Steg ein im Gehäuse verschiebbar gelagerter Betätigungsstift anliegt und am Bügel gegebenenfalls eine Anzeigevorrichtung angeordnet ist.This object is achieved in that all separating devices are arranged in the pivoting region of the web of a substantially U-shaped bracket which is designed as a rocker and is pivotably mounted in the housing, and in that an actuating pin which is displaceably mounted in the housing rests on the web and, if appropriate, a display device is arranged on the bracket is.

Bevorzugte und vorteilhafte Ausführungsformen der efindungsgemäßen Überspannungsschutzvorrichtung sind Gegenstand der Unteransprüche.Preferred and advantageous embodiments of the surge protection device according to the invention are the subject of the dependent claims.

Dadurch, daß allen Abtrennvorrichtungen, die im Überspannungsschutz eingebauten Schutzelementen zugeordnet sind, eine gemeinsame Wippe zugeordnet ist, wird die Konstruktion vereinfacht. Trotzdem ist gewährleistet, daß beim Öffnen (Auslösen) auch nur einer der Abtrennvorrichtungen der Betätigungsstift verschoben und die allenfalls vorgesehene Auslöseanzeigevorrichtung in die Stellung gelangt, die anzeigt, daß ein Austausch der Überspannungsschutzeinrichtung notwendig ist.The construction is simplified by the fact that a common rocker is assigned to all disconnection devices which are installed in the overvoltage protection elements. Nevertheless, it is ensured that when opening (tripping) only one of the disconnecting devices the actuating pin is displaced and the tripping indicator device, if any, comes into the position which indicates that an exchange of the overvoltage protection device is necessary.

Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus der nachstehenden Beschreibung eines Ausführungsbeispieles der Erfindung, nämlich einem als Blockableiter (Überspannungsschutzvorrichtung) ausgebildeten Einsatzelement, das in einen Gerätesockel austauschbar eingesetzt ist. Es zeigt:Further details and features of the invention result from the following description of an embodiment of the invention, namely one as a block arrester (overvoltage protection device) trained insert element, which is used interchangeably in a device base. It shows:

Fig. 1 den in den Gerätesockel eingesetzten Blockableiter von vorne,1 shows the block arrester inserted in the device base from the front,

Fig. 2 die Kombination aus Blockableiter und Gerätesockel von Fig. 1 von der Seite,2 shows the combination of block arrester and device base of FIG. 1 from the side,

Fig. 3 den Gerätesockel von vorne,3 the device base from the front,

Fig. 4 den Gerätesockel von der Seite,4 the device base from the side,

Fig. 5 den Gerätesockel bei abgenommenem Gehäusedeckel,5 shows the device base with the housing cover removed,

Fig. 6 teilweise im Schnitt den Gerätesockel ohne Deckel,6 partially in section the device base without cover,

Fig. 7 das Einsatzelement von unten gesehen,7 seen the insert element from below,

Fig. 8 das Einsatzelement von hinten gesehen,8 seen the insert element from behind,

Fig. 9 das Einsatzelement von unten gesehen mit teilweise weggebrochener Gehäusewand,9 the insert element seen from below with the housing wall partially broken away,

Fig. 10 das Einsatzelement von hinten gesehen bei abgenommenem Gehäusedeckel,10 the insert element seen from behind with the housing cover removed,

Fig. 11 das Einsatzelement ohne Gehäusedeckel, nachdem eine Abtrennvorrichtung geöffnet hat,11 shows the insert element without a housing cover after a separating device has opened,

Fig. 12 den Überspannungsschutz ohne Gehäuse,12 the surge protection without housing,

Fig. 13 die Wippe des Überspannungsschutzes undFig. 13 the rocker of the surge protector and

Fig. 14 eine Seitenansicht der Wippe.Fig. 14 is a side view of the rocker.

In der folgenden Beschreibung beziehen sich die Angaben "oben", "unten", "vorne", "hinten" auf die in Fig. 1 und 2 bezogene Ausrichtung des Gerätesockels 1 und des mit diesem verrasteten Einsatzelement 2, in dem beispielsweise eine Überspannungsschutzeinrichtung untergebracht ist.In the following description, the information “top”, “bottom”, “front”, “rear” relates to the orientation of the device base 1 and the insert element 2 locked in this in FIGS. 1 and 2, in which, for example, an overvoltage protection device is housed.

Der Gerätesockel 1 ist im Querschnitt (Fig. 2) im wesentlichen U-förmig ausgebildet, wobei an seiner Rückseite (also "hinten") eine Einrichtung, bestehend aus einem hakenartigen Ansatz 3 und einem federbelasteten Schnappschieber 4 vorgesehen ist, über welche der Gerätesockel 1, wie an sich bekannt, auf eine beispielsweise in einem Schaltschrank montierte Tragschiene aufgeschnappt werden kann.The device base 1 is essentially U-shaped in cross-section (FIG. 2), a device consisting of a hook-like extension 3 and a spring-loaded snap slide 4 being provided on the rear (ie “rear”), via which the device base 1 , as is known per se, can be snapped onto, for example, a mounting rail mounted in a control cabinet.

In dem in der Fig. 1 und 2 gezeigten Gebrauchslage oberen Schenkel 5 des Gerätesockels 1 sind Anschlußklemmen 6 für drei Außenleiter und eine Anschlußklemme 6' für den Null-Leiter untergebracht, deren Ausbildung aus den Fig. 5 und 6 näher ersichtlich ist.In the position of use shown in FIGS. 1 and 2, upper leg 5 of the device base 1, connection terminals 6 for three outer conductors and a connection terminal 6 'for the neutral conductor are accommodated, the design of which can be seen in more detail in FIGS. 5 and 6.

In dem in der Gebrauchslage unten liegenden Schenkel 7 des Gerätesockels 1 sind eine Anschlußklemme 8 für die Erdleitung sowie zwei Hilfskontaktklemmen 9 und 10 für einen integrierten Hilfsschalter (Schließer) untergebracht.In the leg 7 of the device base 1 lying at the bottom in the position of use, a connection terminal 8 for the earth line and two auxiliary contact terminals 9 and 10 for an integrated auxiliary switch (make contact) are accommodated.

Von jeder Kontaktklemme 6, 6' und 8 geht ein Kontaktwinkel 11 aus, mit dem ein federnder Kontakt 12 verbunden ist. Die Kontakte 12 ragen von den Schenkeln 5 und 7 in den Steg des Gerätesockels 1. Die freien Enden der Kontakte 12 werden von Kontaktfedern 13 nach vorne, also in den Raum zwischen den beiden Schenkeln 5 und 7 des Gerätesockels 1 gedrückt.From each contact terminal 6, 6 'and 8 is a contact angle 11 with which a resilient contact 12 is connected. The contacts 12 protrude from the legs 5 and 7 in the web of the device base 1. The free ends of the contacts 12 are pressed forward by contact springs 13, that is, into the space between the two legs 5 and 7 of the device base 1.

Mit der Hilfskontaktklemme 9 ist eine Blattfeder 17 verbunden, die auf noch näher zu beschreibende Weise von einem Betätigungsstift 37 in Anlage an die Hilfskontaktklemme 10 gebogen werden kann, so daß die Hilfskontaktklemmen 9 und 10 elektrisch leitend miteinander verbunden sind.With the auxiliary contact terminal 9, a leaf spring 17 is connected, which can be bent in a manner to be described in more detail below by an actuating pin 37 in contact with the auxiliary contact terminal 10, so that the auxiliary contact terminals 9 and 10 are electrically conductively connected to one another.

Die Kontakte 12 sind durch Öffnungen 18 im nach vorne weisenden Mittelteil 19 des den Gerätesockel 1 innen verschließenden Gehäusedeckels 20 zugänglich (Fig. 3 und 4).The contacts 12 are accessible through openings 18 in the forward-facing middle part 19 of the housing cover 20 which closes the device base 1 on the inside (FIGS. 3 and 4).

In den oben und unten liegenden Wandteilen 21, 22 des Gehäusedeckels 20 des Gerätesockels 1 sind Griffmulden 23 und 24 eingeformt, die an ihrer tiefsten Stelle in einen Vorsprung 25, der zum Steg des Gerätesockels 1 hin hinterschnitten ausgebildet ist (Fig. 2), auslaufen.In the upper and lower wall parts 21, 22 of the housing cover 20 of the device base 1 there are recessed grips 23 and 24 molded in, which run out at their deepest point in a projection 25 which is undercut towards the web of the device base 1 (FIG. 2).

In dem den unteren Schenkel 7 des Gerätesockels 1 abdeckenden Wandteil des Gehäusedeckels 20 ist in dessen in der Gebrauchslage des Gerätesockels nach oben weisenden Wandteil ein zu dessen Innenseite offener Schlitz 27 vorgesehen, durch den die Kontaktfeder 17 zu-gänglich ist.In the wall part of the housing cover 20 covering the lower leg 7 of the device base 1, in the wall part which points upward in the position of use of the device base, a slot 27 open to the inside thereof is provided, through which the contact spring 17 is accessible.

Das Einsatzelement 2 besitzt ein Gehäuse aus einem Deckel 30 und einer Wanne 31. Durch den in der Gebrauchslage hinten liegenden Boden des Gehäusedeckels 30 ragen ein Kontakt 33 und vier Kontakte 34, die durch die Öffnungen 18 im Wandteil 19 des Gehäusedeckels 20 des Gerätesockels 1 an den Kontakten 12 der Kontaktklemme 8 für die Erdleitung, den Kontakten 12 der drei Kontaktklemmen 6 für die Außenleiter und der Kontaktklemme 6' für den Null-Leiter anliegen, wenn das Einsatzelement 2, wie in den Fig. 1 und 2 gezeigt, mit dem Gerätesockel 1 verrastet ist.The insert element 2 has a housing comprising a cover 30 and a trough 31. A contact 33 and four contacts 34 protrude through the bottom of the housing cover 30 in the position of use, which contacts through the openings 18 in the wall part 19 of the housing cover 20 of the device base 1 the contacts 12 of the contact terminal 8 for the ground line, the contacts 12 of the three contact terminals 6 for the outer conductor and the contact terminal 6 'for the neutral conductor rest when the insert element 2, as shown in FIGS. 1 and 2, with the device base 1 is locked.

An einer Wand der Wanne 31 des Einsatzelementes 2 ist eine vorspringende Rippe 35 vorgesehen, die bei in den Gerätesockel 1 eingesetztem Einsatzelement 2 in den Schlitz 27 eingreift, so daß ausschließlich eine lagerichtige Montage des Einsatzelementes 2 am Gerätesockel 1 möglich ist.On a wall of the trough 31 of the insert element 2, a projecting rib 35 is provided, which engages in the slot 27 when the insert element 2 is inserted in the device base 1, so that only a correct mounting of the insert element 2 on the device base 1 is possible.

Durch eine Öffnung 36 im Bereich des oberen Randes der Wanne 31 des Gehäuses des Einsatzelementes 2 ragt der Betätigungsstift 37, der mit der Kontaktfeder 17 im Gerätesockel 1 auf noch zu beschreibende Art und Weise zusammenwirkt.Through an opening 36 in the region of the upper edge of the trough 31 of the housing of the insert element 2, the actuating pin 37 projects, which interacts with the contact spring 17 in the device base 1 in a manner to be described.

An der Vorderseite, d.h. dem nach vorne weisenden Boden der Wanne 31 des Gehäuses des Einsatzelementes 2 sind noch zwei durch Kunststoffkuppen verschlossene Öffnungen 38 für Prüfkontakte und ein Sichtfenster 39 für eine Auslöseanzeige 90, 91 vorgesehen.On the front, i.e. the forwardly pointing bottom of the trough 31 of the housing of the insert element 2, two openings 38 closed by plastic domes for test contacts and a viewing window 39 for a trigger indicator 90, 91 are provided.

An dem Deckel 30 des Gehäuses des Einsatzelementes 2 sind zwei mit diesem einstückig ausgebildete Schnapparme 40 vorgesehen, die in entsprechende Aussparungen in den Seitenwänden der Wanne 31 des Gehäuses des Einsatzelementes 2 greifen. Jeder Schnapparm 40 trägt einen nach außen weisenden Betätigungsvorsprung 41 und zwei ebenfalls nach außen weisende Rastnasen 42, die bei mit dem Gerätesockel 1 verrastetem Einsatzelement 2, wie in Fig. 2 gezeigt, hinter den Rastvorsprüngen 25 des Gerätesockels 1 einrasten. Um das Einsatzelement 2 vom Gerätesokkel abzunehmen, genügt es von beiden Seiten her auf die Betätigungsvorsprünge 41 zu drücken, so daß die Vorsprünge 42 von den Rastnasen 25 freikommen, und das Einsatzelement 2 nach vorne (d.h. nach rechts der Fig. 2) vom Gerätesockel 1 abgezogen werden kann. Dabei sind die Betätigungsvorsprünge 41 dank der Griffmulden 23, 24 gut zugänglich. In diesem Zusammenhang ist darauf hinzuweisen, daß die Griffmulden 23, 24 in der Einbaustellung, d.h. bei in einem Schaltkasten montierter Kombination aus Gerätesockel 1 und Einsatzelement 2 durch eine Blende abgedeckt, d.h. nicht ohne weiteres zugänglich sind. Unbefugtes Hantieren ist damit wenigstens behindert.On the cover 30 of the housing of the insert element 2, two snap arms 40 are provided which are made in one piece with it, which engage in corresponding recesses in the side walls of the trough 31 of the housing of the insert element 2. Each snap arm 40 carries an outwardly facing actuating projection 41 and two likewise outwardly facing latching lugs 42, which engage behind the latching projections 25 of the device base 1 when the insert element 2 is locked with the device base 1, as shown in FIG. 2. In order to remove the insert element 2 from the device socket, it is sufficient to press the actuating projections 41 from both sides, so that the projections 42 are released from the locking lugs 25, and the insert element 2 to the front (ie to the right of FIG. 2) from the device base 1 can be deducted. The actuating projections 41 are easily accessible thanks to the recessed handles 23, 24. In this context, it should be noted that the recessed handles 23, 24 in the installation position, that is to say when the combination of device base 1 and insert element 2 is mounted in a switch box, are covered by a panel, ie are not readily accessible. Unauthorized handling is at least hampered.

Um den Deckel 30 des Gehäuses des Einsatzelementes 2 mit der Wanne 31 zu verbinden, sind am Deckel 30 vier Zungen 45 angeformt, die an ihren freien Enden Rastvorsprünge (nicht sichtbar), die nach innen weisen, tragen. Die Zungen 45 sind in Nuten 46 in den Außensseiten der beiden Längswände der Wanne 31 aufgenommen, wobei ihre Rastvorsprünge bei auf die Wanne 31 aufgesetztem Deckel 30 in Löcher 47 eingreifen. Die Löcher 47 sind an den hinteren Enden der Nuten 46 vorgesehen.In order to connect the cover 30 of the housing of the insert element 2 to the trough 31, four tongues 45 are formed on the cover 30, which at their free ends have locking projections (not visible) which point inwards. The tongues 45 are received in grooves 46 in the outer sides of the two longitudinal walls of the tub 31, their latching projections engaging in holes 47 when the lid 30 is placed on the tub 31. The holes 47 are provided at the rear ends of the grooves 46.

Im folgenden wird unter Bezugnahme auf die Fig. 9 bis 14 der innere Aufbau des als Überspannungsschutzvorrichtung ausgebildeten Einsatzelementes 2 beschrieben.The inner structure of the insert element 2 designed as a surge protection device is described below with reference to FIGS. 9 to 14.

Im gezeigten Ausführungsbeispiel sind in der Wanne 31 in einem einseitig durch eine Wand 50 abgetrennten Aufnahmeraum derselben vier Schutzelemente 51 in Form von Metalloxid-Varistoren aufgenommen. Jedes Schutzelement 51 ist in einen eigenen Aufnahmeraum eingesetzt, wobei die Aufnahmeräume durch Zwischenwände 52 voneinander getrennt sind.In the exemplary embodiment shown, four protective elements 51 in the form of metal oxide varistors are accommodated in the trough 31 in a receiving space which is separated on one side by a wall 50. Each protective element 51 is inserted into its own receiving space, the receiving spaces being separated from one another by partition walls 52.

Auf beiden Seiten der Schutzelemente 51 sind mit diesen elektrisch leitend Elektroden 53, 54 verbunden. Die Anordnungen aus Schutzelement 51 und den beiden Elektroden 53, 54 sind in ihren Aufnahmeräumen durch eine (Polyurethan-)Vergußmasse 55 festgelegt. Um ein gleichmäßiges und gemeinsames Vergießen mit Niveauausgleich der Vergußmasse 55 zu erreichen, sind bei der Erfindung die Zwischenwände 52 nur so lange ausgebildet, daß sie unterhalb der Oberkante 56 der Wanne 31 enden.On both sides of the protective elements 51 are electrical with them conductive electrodes 53, 54 connected. The arrangements of protective element 51 and the two electrodes 53, 54 are fixed in their receiving spaces by a (polyurethane) potting compound 55. In order to achieve a uniform and common potting with level compensation of the potting compound 55, the partition walls 52 are formed in the invention only so long that they end below the upper edge 56 of the tub 31.

Die Elektroden 54 sind über Anschlußfahnen 57 elektrisch leitend mit einer gemeinsamen Leiterschiene 58 verbunden, die in den Kontakt 33 (sh. Fig. 9) ausläuft. Dabei bilden die Elektroden 54 die "Erdungsseite" der Schutzelemente 51.The electrodes 54 are electrically conductively connected to a common conductor rail 58 which leads into the contact 33 (see FIG. 9). The electrodes 54 form the “ground side” of the protective elements 51.

Zwischen den Kontakten 34 und der auf der "Netzseite" der Schutzelemente 51 angebrachten Elektroden 53 sind jeweils Abtrennvorrichtungen angebracht, die bei Überlastung des Schutzelementes 51 ansprechen.Between the contacts 34 and the electrodes 53 mounted on the "network side" of the protective elements 51, disconnection devices are attached, which respond when the protective element 51 is overloaded.

Die Abtrennvorrichtungen werden im folgenden unter Bezugnahme auf Fig. 12 beschrieben.The separators are described below with reference to FIG. 12.

Jede Abtrennvorrichtung besteht aus einem Stössel in Form eins Rohrniets 60, das mittels Weichlot 61 mit einer Fahne der Elektroden 53 verlötet ist. An einem abgewinkelten Teil 63 der Elektrode 53 ist ein Isoliersstück 100 festgelegt, wobei ein hülsenförmiger Teil des Isolierstückes 100 als Führung für das Rohrniet 60 dient und in sich das Rohrniet 60 gleitend aufnimmt. Über das Isolierstück 100 ist als Auslösefeder eine Schraubendruckfeder 62 gesteckt, die zwischen dem am abgewinkelten Teil 63 der Elektrode 53 befestigten, verbreiterten Ende des Isolierstückes 100 und einer Kontaktplatte 64 mit Vorspannung eingesetzt ist. So ist das eine Ende der Rückstellfeder 62 vom Teil 63 der Fahne der Elektrode 53 elektrisch isoliert. Die Kontaktplatte 64 liegt mit ihrer von der Schraubendruckfeder 62 abgekehrten Seite an einem am Ende des Rohrniet 60 vorgesehenen Bund 65 an. Mit der Kontaktplatte 64 ist ein flexibles Leiterseil 66 elektrisch leitend verbunden, z.B. verschweißt, das zu dem jeweiligen Kontakt 34 führt.Each separating device consists of a plunger in the form of a tubular rivet 60, which is soldered to a flag of the electrodes 53 by means of soft solder 61. An insulating piece 100 is fixed to an angled part 63 of the electrode 53, a sleeve-shaped part of the insulating piece 100 serving as a guide for the tubular rivet 60 and slidably receiving the tubular rivet 60 therein. A helical compression spring 62 is inserted over the insulating piece 100 as a release spring and is inserted between the widened end of the insulating piece 100 fastened to the angled part 63 of the electrode 53 and a contact plate 64 with pretension. One end of the return spring 62 is thus electrically insulated from the part 63 of the flag of the electrode 53. The contact plate 64 lies with its side facing away from the helical compression spring 62 against a collar 65 provided at the end of the tubular rivet 60. A flexible conductor cable 66 is connected to the contact plate 64 in an electrically conductive manner, e.g. welded, which leads to the respective contact 34.

In dem Einsatzelement 2 ist weiters verschwenkbar eine Wippe 70 gelagert, die in den Fig. 13 und 14 für sich gezeigt ist. Die Wippe 70 ist als im wesentlichen U-förmiger Bügel ausgebildet und besitzt an ihren beiden Schenkeln 71, 72 je einen Lagerzapfen 73, 74. Die Lagerzapfen 73, 74 sind in Lageraufnahmen 75, 76 an den Schmalwänden der Wanne 31 um eine Achse 77' verschwenkbar gelagert.A rocker is also pivotable in the insert element 2 70 stored, which is shown in Figs. 13 and 14 by itself. The rocker 70 is designed as an essentially U-shaped bracket and has a bearing journal 73, 74 on each of its two legs 71, 72. The bearing journals 73, 74 are in bearing seats 75, 76 on the narrow walls of the tub 31 about an axis 77 ' pivoted.

Am Steg 77 der Wippe 70 sind vier Ansätze 78 vorgesehen, die mit ihren halbkugelförmig gewölbten Vorderseiten 79 dem den Bund 65 aufweisenden Ende des Rohrniet 60 zugeordnet sind.On the web 77 of the rocker 70 four lugs 78 are provided, which are assigned with their hemispherically curved front sides 79 to the end of the tubular rivet 60 having the collar 65.

In der Wanne 31 ist weiters der erwähnte Betätigungsstift 37 verschiebbar gelagert. Der Betätigungsstift 37 besitzt ein verdicktes Ende 80, das in eine Ausnehmung 81 an dem den längeren Schenkel 72 tragenden Ende des Steges 77 der Wippe 70 eingreift. Zwischen dem verdickten Ende 80 und einer Zwischenwand 82 in der Wanne 31 ist eine Rückstellfeder 83 eingesetzt, die den Betätigungsstift 37 in Anlage an den Steg 77 der Wippe 70 hält.In the tub 31, the aforementioned actuating pin 37 is also slidably mounted. The actuating pin 37 has a thickened end 80 which engages in a recess 81 on the end of the web 77 of the rocker 70 which carries the longer leg 72. Between the thickened end 80 and an intermediate wall 82 in the trough 31, a return spring 83 is inserted, which holds the actuating pin 37 in contact with the web 77 of the rocker 70.

Es ist ersichtlich, daß der Betätigungsstift 37 beim Verschwenken der Wippe 70 aus der in Fig. 12 gezeigten, in der Gebrauchslage im wesentlichen horizontalen Lage seiner Schenkel 71, 72 (in Fig. 12 vertikal) in die in Fig. 12 ebenfalls gezeigte schräge Lage aus dem Gehäuse des Einsatzelementes 2 vorgeschoben wird und durch den Schlitz 27 die Kontaktfeder 17 in Anlage an die Hilfskontaktklemme 10 drückt, so daß die Hilfskontaktklemmen 9 und 10 miteinander elektrisch leitend verbunden sind.It can be seen that the actuating pin 37 when the rocker 70 is pivoted from the position of its legs 71, 72 (in the position of use) which is substantially horizontal in the position of use (vertical in FIG. 12) into the inclined position also shown in FIG. 12 is pushed out of the housing of the insert element 2 and presses the contact spring 17 into contact with the auxiliary contact terminal 10 through the slot 27, so that the auxiliary contact terminals 9 and 10 are electrically conductively connected to one another.

Wird eine Lötstelle 61, die das Rohrniet 60 mit dem abgewinkelten Teil 63 der Fahne der Elektrode 53 verbindet, auf eine bestimmte Temperatur gebracht, öffnet sich diese Lötstelle 61 und das Rohrniet 60 wird von der Schraubendruckfeder (Auslösefeder) 62 angetrieben, von dem abgewinkelten Teil 63 der Elektrode 53 wegbewegt und bei dieser Bewegung in dem Isolierstück 100 geführt. Dieses Isolierstück 100 gewährleistet auch die Isolation zwischen dem abgewinkelten Teil 63 der Elektrode 53 und der Auslösefeder 62 nach einer Auslösung, d.h. einem Abtrennvorgang. Bei diesem Abtrennvorgang (des Varistors 51 vom Netz) entsteht zwischen dem abgewinkelten Teil 63 der Elektrode 53 und dem Rohrniet 60 eine Luftstrecke von beispielweise 5 mm, so daß die nötige Spannungsfestigkeit gewährleistet ist.If a solder joint 61, which connects the tubular rivet 60 to the angled part 63 of the lug of the electrode 53, is brought to a certain temperature, this solder joint 61 opens and the tubular rivet 60 is driven by the helical compression spring (release spring) 62, by the angled part 63 of the electrode 53 moves away and is guided in the insulating piece 100 during this movement. This insulating piece 100 also ensures the insulation between the angled part 63 of the electrode 53 and the release spring 62 after a release, ie a disconnection process. In this disconnection process (the varistor 51 from Mesh) creates an air gap of, for example, 5 mm between the angled part 63 of the electrode 53 and the tubular rivet 60, so that the necessary dielectric strength is ensured.

Beim beschriebenen Abtrennvorgang, also dem Öffnen einer Lötstelle 61 irgendeiner der Abtrennvorrichtungen, die den vier Varistoren 51 zugeordnet sind, wird wie erwähnt, die Wippe 70 in die in Fig. 12 gezeigte schräge Lage verschwenkt. Durch diese Schwenkbewegung der Wippe 70 in ihre Auslösestellung wird der Betätigungsstift 37 wie erwähnt durch die Öffnung aus dem Gehäuse des Einsatzelementes 2 herausgeschoben.In the described separation process, that is to say the opening of a soldering point 61 of any of the separation devices which are assigned to the four varistors 51, the rocker 70 is pivoted into the inclined position shown in FIG. 12, as mentioned. As a result of this pivoting movement of the rocker 70 into its release position, the actuating pin 37 is pushed out of the housing of the insert element 2 through the opening.

Das freie Ende des längeren Schenkels 72 der Wippe 70 dient als Anzeigevorrichtung für alle Polstrecken der Überspannungsschutzeinrichtung. Durch das Sichtfenster 39, in dem in der Gebrauchsstellung (Fig. 1 und 2) nach vorne weisenden Boden der Wanne 31, ist entweder die grün eingefärbte Endfläche 90 des Schenkels 72 oder die rot eingefärbte Endfläche 91 eines Zeigers 92, der wie aus Fig. 14 oder 12 ersichtlich, mit dem freien Ende des längeren Schenkels 74 der Wippe 70 verrastet ist, sichtbar. Beim oben beschriebenen Abtrennvorgang wechselt die Anzeige, die im Sichtfenster 39 sichtbar ist, von grün (Endfläche 90) auf rot (Endfläche 91) und zeigt damit an, daß ein Austausch des Einsatzelementes 2 notwendig ist.The free end of the longer leg 72 of the rocker 70 serves as a display device for all pole sections of the overvoltage protection device. Through the viewing window 39, in the bottom of the tub 31 pointing forward in the position of use (FIGS. 1 and 2), either the green-colored end face 90 of the leg 72 or the red-colored end face 91 of a pointer 92, which, as shown in FIG. 14 or 12 can be seen, is locked with the free end of the longer leg 74 of the rocker 70, visible. In the separation process described above, the display which is visible in the viewing window 39 changes from green (end surface 90) to red (end surface 91) and thus indicates that an exchange of the insert element 2 is necessary.

Für die allenfalls erforderliche Prüfung eines vorgeschalteten Fehlerstromschutzschalters sind zwei Prüfkontakte 95 vorgesehen, die mit einem Außenleiter (der in Fig. 10 obere Prüfkontakt 95) bzw. mit Erde (der in Fig. 10 untere Prüfkontakt 95) verbunden sind. Die Prüfkontakte 95 sind, wie erwähnt, durch die mit Kunststoffkuppen verschlossenen Öffnungen 38, die ebenfalls im Boden der Wanne 31 vorgesehen sind, zugänglich.For the test of an upstream residual current circuit breaker which may be necessary, two test contacts 95 are provided, which are connected to an outer conductor (the upper test contact 95 in FIG. 10) or to earth (the lower test contact 95 in FIG. 10). As mentioned, the test contacts 95 are accessible through the openings 38 which are closed with plastic domes and which are likewise provided in the base of the trough 31.

Zusammenfassend kann die Erfindung beispielsweise wie folgt dargestellt werden:In summary, the invention can be represented as follows, for example:

Eine Überspannungsschutzvorrichtung 2 besitzt mehrere in einem Gehäuse untergebrachte Varistoren 51, deren erdleitungsseitigen Elektroden über eine Leiste 58 elektrisch leitend miteinander verbunden sind. Die netzseitigen Elektroden 53 der Varistoren sind über Abtrennvorrichtungen 60, 61 mit Kontaktstükken 34 verbunden. Die Abtrennvorrichtungen bestehen aus einem als Rohrniet 60 ausgebildeten Stössel, der mit den Elektroden 53 über eine Weichlotstelle 61 verbunden ist. Der Stössel 61 ist in einer Führung 100 aus Isolierwerkstoff verschiebbar aufgenommen. Jeder der Stössel 60 wirkt mit einem seiner Enden mit einer allen Abtrennvorrichtungen gemeinsamen Wippe (70) zusammen, die in der Überspannungsschutzvorrichtung verschwenkbar ist. Im Auslösefall, d.h. bei Überlastung eines der Varistoren 51, öffnet sich die Weichlotverbindung 61 und der betroffene Stössel 60 verschwenkt, angetrieben durch eine Auslösefeder 62 die Wippe 70, die ihrerseits einen Betätigungsstift 37 verschiebt, so daß weitere Schaltvorgänge ausgelöst werden. Die Wippe 70 trägt weiters eine Anzeigevorrichtung 90, 91, die durch ein Fenster im Gehäuse der Überspannungsschutzvorrichtung (2) sichtbar ist, so daß von außen erkennbar ist, daß eine der Abtrennvorrichtungen 60, 61 ausgelöst hat. Dadurch, daß allen Abtrennvorrichtungen eine einzige Wippe 70 zugeordnet ist, ergibt sich eine einfache Konstruktion der Überspannungsschutzvorrichtung.An overvoltage protection device 2 has a plurality of varistors 51 accommodated in a housing, the electrodes of which on the ground line side are electrically conductive with one another via a strip 58 are connected. The network-side electrodes 53 of the varistors are connected to contact pieces 34 via disconnection devices 60, 61. The separating devices consist of a plunger designed as a tubular rivet 60, which is connected to the electrodes 53 via a soft soldering point 61. The plunger 61 is slidably received in a guide 100 made of insulating material. Each of the plungers 60 cooperates with one of its ends with a rocker (70) which is common to all disconnection devices and which can be pivoted in the overvoltage protection device. In the event of tripping, ie when one of the varistors 51 is overloaded, the soft solder connection 61 opens and the plunger 60 in question is pivoted, driven by a tripping spring 62, the rocker 70, which in turn displaces an actuating pin 37 so that further switching operations are triggered. The rocker 70 also carries a display device 90, 91, which is visible through a window in the housing of the surge protection device (2), so that it can be seen from the outside that one of the disconnection devices 60, 61 has triggered. The fact that a single rocker 70 is assigned to all disconnection devices results in a simple construction of the overvoltage protection device.

Claims (16)

  1. Voltage overload protective device (2) with two or a plurality of protective members (51) housed in a casing (30, 31) and in the form of varistors, whose electrodes (54) on the earth conductor side are electrically conductively interconnected by a strip (58) with a contact piece (33), the other electrodes (53) on the mains side being connected by separator devices (60, 61) incorporated in series with the protective members (51), and with contact pieces (34), characterised in that all the separator devices (60, 61) are disposed in the pivotal area of the web (77) of a bracket (70) in the form of a rocker pivotally mounted in the casing (30, 31) and being substantially U-shaped, and in that an actuating pin (37) movably mounted in the casing (30, 31) abuts on the web (77), and if necessary a display device (90, 91) is disposed on the bracket (70).
  2. Device according to claim 1, characterised in that the protective members (51) are contained in a casing portion (31) of the overload voltage protective device 92) and are encapsulated therein with a sealing compound (55).
  3. Device according to claim 2, characterised in that the protective members (51) are encapsulated with a polyurethane sealing compound.
  4. Device according to claims 1 to 3, characterised in that the substantially U-shaped bracket (70) is movably mounted in the casing (30, 31) via journals (73, 74) integrally formed on its arm (71, 72).
  5. Device according to one of claims 1 to 4, characterised in that projections (78) are integrally formed on the web (77) of the U-shaped bracket (70), and in that each respective projection (70) faces one of the separator devices (60, 61).
  6. Device according to one of claims 1 to 5, characterised in that the end (80) of the actuating pin (37) accommodated in the interior of the casing is housed in a recess (81) in the web (72) of the bracket (70).
  7. Device according to claim 6, characterised in that the end (80) of the actuating pin (37) disposed in the interior of the casing (30, 31) of the protective device (2) is widened in a head-like manner, and in that there is provided between the wall (82) of the casing (30, 31) and the head (80) a compression spring (83) which is thrust over the actuating pin (37) so that the latter is pressed against the web (77) of the rocker (70).
  8. Device according to one of claims 1 to 7, characterised in that the separator device comprises a ram (60) of electrically conductive material, which is movably housed in a guide (100) of insulating material, and which is attached to the electrode (53) by one end with the aid of a soldered connection (61).
  9. Device according to claim 8, characterised in that the ram (60) is connected via a contact plate (64) and flexible conductor cable (66) to the contact piece (34).
  10. Device according to claim 9, characterised in that the contact plate (64) abuts on a collar which is formed on the ram (60).
  11. Device according to one of claims 8 to 10, characterised in that the guide (100) for the ram (60) is attached to a lug projecting from the electrode (53) especially on a bent-over end (63) of the same.
  12. Device according to one of claims 8 or 9, characterised in that there is thrust over the guide (100) guiding the ram (60) a helical compressive spring (62) which abuts on the contact plate (64) itself abutting on the collar of the ram (60), and abuts on a flange of the guide (100) by means of which said guide is connected to the electrode (53).
  13. Device according to one of claims 1 to 12, characterised in that there are integrally formed on the web (77) of the rocker (70) projections (78) which are aligned towards the ram (60).
  14. Device according to claim 13, characterised in that the ends (79) of the projections (78) facing the rams (60) are semi-circular in shape.
  15. Device according to one of claims 1 to 14, characterised in that one arm (72) of the rocker (70) is elongated beyond its pivotal axis (77') and is in the form of a triggering indicator (90, 91), and in that a viewing window (39)is provided in the casing (30, 31) of the overload voltage protector device (2) opposite the end of the arm (72).
  16. Device according to one of claims 6 to 15, characterised in that the ram (60) is in the form of a tubular rivet.
EP94921523A 1993-11-02 1994-07-15 Overvoltage protection device Expired - Lifetime EP0727091B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT2201/93 1993-11-02
AT0220193A AT400781B (en) 1993-11-02 1993-11-02 OVERVOLTAGE PROTECTION DEVICE
PCT/AT1994/000094 WO1995012893A1 (en) 1993-11-02 1994-07-15 Overvoltage protection device

Publications (2)

Publication Number Publication Date
EP0727091A1 EP0727091A1 (en) 1996-08-21
EP0727091B1 true EP0727091B1 (en) 1997-08-27

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EP (1) EP0727091B1 (en)
AT (2) AT400781B (en)
AU (1) AU677682B2 (en)
CZ (1) CZ284812B6 (en)
DE (1) DE59403893D1 (en)
DK (1) DK0727091T3 (en)
ES (1) ES2109003T3 (en)
HU (1) HU215889B (en)
NO (1) NO308818B1 (en)
PL (1) PL174999B1 (en)
WO (1) WO1995012893A1 (en)

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CN101490916B (en) * 2006-07-18 2012-05-23 德恩及索恩两合股份有限公司 Pluggable device assembly for overvoltage protection
WO2009147043A1 (en) * 2008-06-03 2009-12-10 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection device with a thermal disconnection apparatus
DE102008026555A1 (en) 2008-06-03 2009-12-10 Dehn + Söhne Gmbh + Co. Kg Overvoltage protection device with thermal cut-off device
CN102057449B (en) * 2008-06-03 2012-09-05 德恩及索恩两合股份有限公司 Overvoltage protector with thermal separation device
DE102008026555B4 (en) * 2008-06-03 2016-08-04 DEHN + SÖHNE GmbH + Co. KG. Overvoltage protection device with thermal cut-off device
US11817237B2 (en) 2020-03-17 2023-11-14 Dehn Se Surge protection device and modular surge protection system

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Publication number Publication date
DK0727091T3 (en) 1997-09-29
HU9601164D0 (en) 1996-07-29
DE59403893D1 (en) 1997-10-02
EP0727091A1 (en) 1996-08-21
NO961788L (en) 1996-06-24
HUT75409A (en) 1997-05-28
AU7236994A (en) 1995-05-23
ATA220193A (en) 1995-07-15
NO961788D0 (en) 1996-05-02
CZ128696A3 (en) 1998-12-16
AU677682B2 (en) 1997-05-01
HU215889B (en) 1999-03-29
AT400781B (en) 1996-03-25
CZ284812B6 (en) 1999-03-17
ES2109003T3 (en) 1998-01-01
PL314226A1 (en) 1996-09-02
WO1995012893A1 (en) 1995-05-11
NO308818B1 (en) 2000-10-30
ATE157480T1 (en) 1997-09-15
PL174999B1 (en) 1998-10-30

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