EP0017818B1 - Earth fault circuit breaker with a checking device including a checking button - Google Patents

Earth fault circuit breaker with a checking device including a checking button Download PDF

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Publication number
EP0017818B1
EP0017818B1 EP80101611A EP80101611A EP0017818B1 EP 0017818 B1 EP0017818 B1 EP 0017818B1 EP 80101611 A EP80101611 A EP 80101611A EP 80101611 A EP80101611 A EP 80101611A EP 0017818 B1 EP0017818 B1 EP 0017818B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
switching mechanism
shaped spring
contact system
current circuit
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
Application number
EP80101611A
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German (de)
French (fr)
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EP0017818A1 (en
Inventor
Fritz Mentel
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.)
Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT80101611T priority Critical patent/ATE1562T1/en
Publication of EP0017818A1 publication Critical patent/EP0017818A1/en
Application granted granted Critical
Publication of EP0017818B1 publication Critical patent/EP0017818B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • 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
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H01H2083/045—Auxiliary switch opening testing circuit in synchronism with the main circuit

Definitions

  • the invention relates to a residual current circuit breaker with a test device according to the preamble of claim 1.
  • a residual current circuit breaker is known (DE-A-2 504 007).
  • the invention has for its object to develop a residual current circuit breaker with carrier and test device, which has a particularly small space requirement with regard to the test device and the assembly.
  • This object is achieved by the characterizing features of claim 1.
  • the V-shaped spring assumes both a mechanical and an electrical function for the test device of the summation current transformer. It allows short distances to the wearer and it can be kept small. This means that a smaller carrier and a smaller housing for the residual current circuit breaker are sufficient.
  • Such a residual current circuit breaker can be built with the profile of a low circuit breaker and yet be made much narrower in the direction of a conventional mounting rail than it is wide across the rail. This advantage of the small structure is particularly evident when the fixed contact pieces are also arranged on the carrier, so that the tolerance insensitivity is further increased.
  • a V-shaped spring with a test button is known per se (DE-B-2 220 558).
  • DE-B-2 220 558 A V-shaped spring with a test button is known per se (DE-B-2 220 558).
  • the special advantages in connection with a carrier and the special structure cannot be gained there.
  • the V-shaped spring of the test device can be a helical spring with an extended end. Such a structure is particularly simple.
  • the shift drum 4 can be held with its axis on an arm of the wearer, to be positioned lying in front of the drawing plane. At its other end, it can find an abutment in the circuit boards of the key switch.
  • the switch lock 6 and the magnetic trigger 3 are fastened on a wall opposite one another on the support 5 and, below in the exemplary embodiment, the switching drum 4 for the contact system 7 is arranged transversely.
  • the summation current transformer 2 is arranged with its imaginary axis upright on the narrow side of the magnetic release 3 and switch 6.
  • the carrier 5 is angular. Its corner houses the magnetic trigger 3.
  • the carrier 5 sits on a base in the housing 1, which can be formed by projecting edges and shielding walls.
  • the base is provided with a pocket-shaped recess 8 for the switching lock 6 arranged on the outside of the angular carrier 5 (FIG. 3).
  • a partition wall can be formed between two adjacent movable contact pieces. 1, the partition is parallel to the plane of the drawing behind a contact piece 10 of the contact system 7.
  • connection terminals 11 according to FIG. 2 can be accommodated in the corners adjacent to the summation current transformer 2 on a narrow side of the housing. On the opposite narrow side, outgoing terminals 12 and a stack of fire-extinguishing plates 13 according to FIG. 1 are arranged underneath.
  • the spring 15 made of electrically conductive material is electrically connected to a phase in the residual current circuit breaker.
  • a suitable ballast resistor 17 is expediently interposed.
  • the V-shaped spring 15 is designed as a coil spring with an extended end. 1 and 2, the test circuit for the usual test device for a residual current circuit breaker is formed by a contact piece 20 which, via a contact lug 21 in the switched-on state, that is to say when the contact pieces 10 and 22 are in contact, has contact with the phase conductor which is connected to the contact piece 10 lies, produces.
  • the test circuit is further developed by a line 23 with the series resistor 17 and through the V-shaped spring 15. It is further formed by contact with the stripped area of the turn 16 of the neutral conductor.
  • 24 denotes a phase conductor of the primary winding
  • 25 denotes the secondary winding of the summation current transformer 2.
  • the housing 1 has a cap 26 which is screwed onto a lower part. On the underside of the housing 1, a snap bracket for snapping onto mounting rails is formed.
  • the snap holder is formed in the usual way by a nose 27 and by a slide 28.

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

1. A fault current circuit breaker having a testing device which contains a test key (14) ; a switching mechanism which, in the event of a current inbalance of the phase conductors and the neutral conductor which are led through a totalising current transformer (2), can be unlatched by means of a magnetic tripping device (3), and which switching mechanism interrupts the tested conductors by means of a contact system (7) on a drum switch (4) ; and a carrier to which the switching mechanism, the magnetic tripping device and the drum switch of the contact system are commonly secured so as to be insertable into the housing, characterised in that the test key (14) is raised into the normal (rest) position by a V-shaped spring (15), in the resilient region of which, there is arranged a bared winding (16) of the neutral conductor of the primary winding, which is located on the summation current transformer (2), and that the V-shaped spring (15) is electrically connected to one phase.

Description

Die Erfindung bezieht sich auf einen Fehlerstromschutzschalter mit Prüfeinrichtung gemäß Oberbegriff des Anspruches 1. Ein derartiger Fehlerstromschutzschalter ist bekannt (DE-A-2 504 007).The invention relates to a residual current circuit breaker with a test device according to the preamble of claim 1. Such a residual current circuit breaker is known (DE-A-2 504 007).

Ein gemeinsamer Träger vereinfacht bekanntlich die Montage und vermindert die Toleranzempfindlichkeit. Problematisch bleibt es, die Prüfeinrichtung so auszubilden und unterzubringen, daß die theoretisch mögliche Raumeinsparung auch verwirklicht werden kann.As is well known, a common carrier simplifies assembly and reduces tolerance sensitivity. It remains problematic to design and accommodate the test facility in such a way that the theoretically possible space saving can also be realized.

Der Erfindung liegt die Aufgabe zugrunde, einen Fehlerstromschutzschalter mit Träger und Prüfeinrichtung zu entwickeln, der hinsichtlich der Prüfeinrichtung und des Zusammenbaus besonders geringen Raumbedarf aufweist. Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Die V-förmige Feder übernimmt zugleich eine mechanische und eine elektrische Funktion für die Prüfeinrichtung des Summenstromwandlers. Sie ermöglicht kurze Wege zum Träger und sie kann selbst kleingehalten werden. Dadurch kommt man mit einem kleineren Träger und kleineren Gehäuse für den Fehlerstromschutzschalter aus. Ein solcher Fehlerstromschutzschalter kann mit dem Profil eines niedrigen Leitungsschutzschalters gebaut werden und dennoch in Richtung einer üblichen Tragschiene sehr viel schmaler als quer zur Schiene breit ausgebildet werden. Dieser Vorteil des kleinen Aufbaus kommt besonders zum Tragen, wenn auch noch die Festkontaktstücke am Träger angeordnet sind, so daß die Toleranzunempfindlichkeit weiter gesteigert ist.The invention has for its object to develop a residual current circuit breaker with carrier and test device, which has a particularly small space requirement with regard to the test device and the assembly. This object is achieved by the characterizing features of claim 1. The V-shaped spring assumes both a mechanical and an electrical function for the test device of the summation current transformer. It allows short distances to the wearer and it can be kept small. This means that a smaller carrier and a smaller housing for the residual current circuit breaker are sufficient. Such a residual current circuit breaker can be built with the profile of a low circuit breaker and yet be made much narrower in the direction of a conventional mounting rail than it is wide across the rail. This advantage of the small structure is particularly evident when the fixed contact pieces are also arranged on the carrier, so that the tolerance insensitivity is further increased.

Eine V-förmige Feder mit Prüftaste ist an sich bekannt (DE-B-2 220 558). Die besonderen Vorteile in Verbindung mit einem Träger und auch der besondere Aufbau kann jedoch dort nicht gewonnen werden.A V-shaped spring with a test button is known per se (DE-B-2 220 558). However, the special advantages in connection with a carrier and the special structure cannot be gained there.

Die V-förmige Feder der Prüfeinrichtung kann eine Schraubenfeder mit verlängertem Ende sein. Ein solcher Aufbau ist besonders einfach.The V-shaped spring of the test device can be a helical spring with an extended end. Such a structure is particularly simple.

Die Erfindung soll anhand eines in der Zeichnung schematisch wiedergegebenen Ausführungsbeispiels erläutert werden:

  • In Fig. 1 ist der Fehlerstromschutzschalter bei einem Schnitt quer zur Richtung einer Schiene, auf die der Schalter aufgeschnappt werden kann, dargestellt. Der Schnitt verläuft dicht unter der Gehäusewand. In Fig. 1 ist die Rückseite des Fehlerstromschutzschalters wiedergegeben.
  • In Fig. 2 ist die Aufsicht auf den Fehlerstromschutzschalter bei angenommener Gehäusekappe dargestellt.
  • In Fig. 3 ist die Vorderansicht des Fehlerstromschutzschalters bei einem Schnitt parallel zu dem von Fig. 1 wiedergegeben.
The invention will be explained with reference to an exemplary embodiment shown schematically in the drawing:
  • In Fig. 1, the residual current circuit breaker is shown in a section transverse to the direction of a rail on which the switch can be snapped. The cut runs just below the housing wall. In Fig. 1 the back of the residual current circuit breaker is shown.
  • 2 shows the top view of the residual current circuit breaker with the housing cap assumed.
  • FIG. 3 shows the front view of the residual current circuit breaker in a section parallel to that of FIG. 1.

Im Gehäuse 1 des Fehlerstromschutzschalters nach Fig. 1 sind untergebracht ein Summenstromwandler 2, ein Magnetauslöser 3, üblicherweise ein Haltemagnet und ein Kontaktsystem 7 mit einer Schaltwalze 4. An einem Träger 5 aus isolierendem Formstoff sind auf der in Fig. 1 nicht eingesehenen Seite ein Schaltschloß 6 (Fig. 3), der Magnetauslöser 3 und das Kontaktsystem 7 mittels der Schaltwalze 4 befestigt. Die Schaltwalze 4 kann mit ihrer Achse an einem Arm des Trägers, vor der Zeichenebene liegend vorzustellen, gehalten werden. An ihrem anderen Ende kann sie in den Platinen des Schaltschlosses ein Widerlager finden.1 contains a summation current transformer 2, a magnetic release 3, usually a holding magnet and a contact system 7 with a switching drum 4. On a side 5 made of insulating molded material there is a switching lock on the side not shown in FIG. 1 6 (Fig. 3), the magnetic release 3 and the contact system 7 attached by means of the shift drum 4. The shift drum 4 can be held with its axis on an arm of the wearer, to be positioned lying in front of the drawing plane. At its other end, it can find an abutment in the circuit boards of the key switch.

Am Träger 5 sind das Schaltschloß 6 und der Magnetauslöser 3 an einer Wand gegenüberliegend befestigt und darunter querliegend ist im Ausführungsbeispiel die Schaltwalze 4 für das Kontaktsystem 7 angeordnet. Der Summenstromwandler 2 ist mit seiner gedachten Achse stehend an der Schmalseite von Magnetauslöser 3 und Schaltschloß 6 angeordnet.The switch lock 6 and the magnetic trigger 3 are fastened on a wall opposite one another on the support 5 and, below in the exemplary embodiment, the switching drum 4 for the contact system 7 is arranged transversely. The summation current transformer 2 is arranged with its imaginary axis upright on the narrow side of the magnetic release 3 and switch 6.

Wie man aus Fig. 2 in Zusammenschau mit Fig. 1 ersehen kann, ist der Träger 5 winkelförmig ausgebildet. Seine Ecke nimmt den Magnetauslöser 3 auf. Der Träger 5 sitzt auf einem Sockel im Gehäuse 1 auf, der durch vorspringende Ränder und abschirmende Wände gebildet werden kann. Der Sockel ist mit einer taschenförmigen Ausnehmung 8 für das an der Außenseite des winkelförmigen Trägers 5 angeordnete Schaltschloß 6 versehen (Fig. 3). Bei einem zweipoligen Fehlerstromschutzschalter kann eine Trennwand zwischen zwei benachbarten beweglichen Kontaktstücken ausgebildet sein. Anhand von Fig. 1 orientiert, liegt die Trennwand parallel zur Zeichenebene hinter einem Kontaktstück 10 des Kontaktsystems 7.As can be seen from Fig. 2 in conjunction with Fig. 1, the carrier 5 is angular. Its corner houses the magnetic trigger 3. The carrier 5 sits on a base in the housing 1, which can be formed by projecting edges and shielding walls. The base is provided with a pocket-shaped recess 8 for the switching lock 6 arranged on the outside of the angular carrier 5 (FIG. 3). In the case of a two-pole residual current circuit breaker, a partition wall can be formed between two adjacent movable contact pieces. 1, the partition is parallel to the plane of the drawing behind a contact piece 10 of the contact system 7.

Bei einem zweipoligen Fehlerstromschutzschalter lassen sich in den zum Summenstromwandler 2 benachbarten Ecken an einer Schmalseite des Gehäuses Anschlußklemmen 11 nach Fig. 2 unterbringen. An der gegenüberliegenden Schmalseite sind Abgangsklemmen 12 und darunterliegend Löschblechstapel 13 nach Fig. 1 angeordnet.In the case of a two-pole residual current circuit breaker, connection terminals 11 according to FIG. 2 can be accommodated in the corners adjacent to the summation current transformer 2 on a narrow side of the housing. On the opposite narrow side, outgoing terminals 12 and a stack of fire-extinguishing plates 13 according to FIG. 1 are arranged underneath.

Eine Prüftaste 14 nach Fig. wird von einer V-förmigen Feder 15 in ihre Ruhelage angehoben. Im Federungsbereich der Feder 15 liegt eine Windung 16 des Nulleiters der Primärwicklung. Sie ist in dem Bereich, in dem der Arm der Feder 15 aufsetzen kann, abisoliert. Die Feder 15 aus elektrisch leitendem Material ist elektrisch mit einer Phase im Fehlerstromschutzschalter verbunden. Zweckmäßigerweise ist ein geeigneter Vorschaltwiderstand 17 zwischengeschaltet.A test button 14 according to FIG. Is lifted into its rest position by a V-shaped spring 15. In the spring region of the spring 15 there is a turn 16 of the neutral conductor of the primary winding. It is stripped in the area in which the arm of the spring 15 can touch down. The spring 15 made of electrically conductive material is electrically connected to a phase in the residual current circuit breaker. A suitable ballast resistor 17 is expediently interposed.

Die V-förmige Feder 15 ist als Schraubenfeder mit verlängertem Ende ausgebildet. Der Prüfstromkreis für die übliche Prüfeinrichtung eines Fehlerstromschutzschalters wird nach den Fig. 1 und 2 gebildet durch ein Kontaktstück 20, das über eine Kontaktnase 21 im eingeschalteten Zustand, wenn also die Kontaktstücke 10 und 22 sich berühren, Kontakt zum Phasenleiter, der am Kontaktstück 10 angeschlossen liegt, herstellt. Der Prüfstromkreis wird weiter gebildet durch eine Leitung 23 mit dem Vorschaltwiderstand 17 und durch die V-förmige Feder 15. Er wird weiter gebildet durch Kontakt zum abisolierten Bereich der Windung 16 des Nulleiters. Mit 24 ist im Ausführungsbeispiel ein Phasenleiter der Primärwicklung und mit 25 die Sekundärwicklung des Summenstromwandlers 2 bezeichnet. Das Gehäuse 1 weist eine Kappe 26 auf, die auf einem Unterteil aufgeschraubt ist. An der Unterseite des Gehäuses 1 ist eine Schnapphalterung zum Aufschnappen auf Tragschienen ausgebildet. Die Schnapphalterung wird in üblicher Weise durch eine Nase 27 und durch einen Schieber 28 gebildet.The V-shaped spring 15 is designed as a coil spring with an extended end. 1 and 2, the test circuit for the usual test device for a residual current circuit breaker is formed by a contact piece 20 which, via a contact lug 21 in the switched-on state, that is to say when the contact pieces 10 and 22 are in contact, has contact with the phase conductor which is connected to the contact piece 10 lies, produces. The test circuit is further developed by a line 23 with the series resistor 17 and through the V-shaped spring 15. It is further formed by contact with the stripped area of the turn 16 of the neutral conductor. In the exemplary embodiment, 24 denotes a phase conductor of the primary winding and 25 denotes the secondary winding of the summation current transformer 2. The housing 1 has a cap 26 which is screwed onto a lower part. On the underside of the housing 1, a snap bracket for snapping onto mounting rails is formed. The snap holder is formed in the usual way by a nose 27 and by a slide 28.

Claims (2)

1. A fault current circuit breaker having a testing device which contains a test key (14); a switching mechanism which, in the event of a current inbalance of the phase conductors and the neutral conductor which are led through a totalising current transformer (2), can be unlatched by means of a magnetic tripping device (3), and which switching mechanism interrupts the tested conductors by means of a contact system (7) on a drum switch (4); and a carrier to which the switching mechanism, the magnetic tripping device and the drum switch of the contact system are commonly secured so as to be insertable into the housing, characterised in that the test key (14) is raised into the normal (rest) position by a V-shaped spring (15), in the resilient region of which, there is arranged a bared winding (16) of the neutral conductor of the primary winding, which is located on the summation current transformer (2), and that the V-shaped spring (15) is electrically connected to one phase.
2. A fault current circuit breaker as claimed in Claim 1, characterised in that the V-shaped spring (15) is formed by a helical spring having an extended end.
EP80101611A 1979-04-12 1980-03-26 Earth fault circuit breaker with a checking device including a checking button Expired EP0017818B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101611T ATE1562T1 (en) 1979-04-12 1980-03-26 RESIDUAL CURRENT CIRCUIT BREAKER WITH TEST DEVICE CONTAINING A TEST BUTTON.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2915091 1979-04-12
DE2915091A DE2915091C2 (en) 1979-04-12 1979-04-12 Residual current circuit breaker

Publications (2)

Publication Number Publication Date
EP0017818A1 EP0017818A1 (en) 1980-10-29
EP0017818B1 true EP0017818B1 (en) 1982-09-15

Family

ID=6068304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101611A Expired EP0017818B1 (en) 1979-04-12 1980-03-26 Earth fault circuit breaker with a checking device including a checking button

Country Status (6)

Country Link
EP (1) EP0017818B1 (en)
JP (1) JPS55146837A (en)
AT (1) ATE1562T1 (en)
DE (1) DE2915091C2 (en)
ES (1) ES8103470A1 (en)
GR (1) GR67227B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852858U (en) * 1981-09-28 1983-04-09 テンパール工業株式会社 Electric leakage or disconnection
FR2530073A1 (en) * 1982-07-12 1984-01-13 Merlin Gerin BIPOLAR DIFFERENTIAL SWITCH
FR2569901B1 (en) * 1984-09-06 1986-12-26 Hager Electro IMPROVEMENTS TO AUTOMATIC SWITCHES, IN PARTICULAR TO DIFFERENTIAL SWITCHES AND CIRCUIT BREAKERS
FR2626105B1 (en) * 1988-01-20 1990-06-15 Hager Electro ELECTRICAL PROTECTION APPARATUS
FR3016078A1 (en) * 2013-12-27 2015-07-03 Legrand France ELECTRICAL EQUIPMENT WITH MODULAR FORMAT

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176255B (en) * 1960-11-15 1964-08-20 Condor Werk Gebr Frede K G Residual current circuit breaker with a switching bridge carrying the contact bridges and with a switch
DE1285053B (en) * 1960-12-24 1968-12-12 Busch Jaeger Duerener Metall Residual current circuit breaker
DE1563671C3 (en) * 1966-03-16 1975-05-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Residual current circuit breaker
DE2220558C3 (en) * 1972-04-26 1975-07-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Residual current circuit breaker
DE2355306C2 (en) * 1973-11-06 1974-12-05 Felten & Guilleaume Schaltanlagen Gmbh, 4150 Krefeld Residual current circuit breaker
AT339991B (en) * 1974-02-08 1977-11-25 Schrack Elektrizitaets Ag E FAULT CURRENT OR FAULT VOLTAGE CIRCUIT BREAKER OR DGL.
DE2739632C2 (en) * 1977-09-02 1980-11-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Residual current circuit breaker
IT1094409B (en) * 1978-04-17 1985-08-02 Elettrocontutture Spa MECHANISM PARTICULARLY SUITABLE FOR MAKING MINIATURIZED DIFFERENTIAL SWITCHES WITH HIGH AND VERY HIGH SENSITIVITY, AND FOR BEING OPERATED BY VERY SENSITIVE AND MECHANICALLY DELICATE RELEASES

Also Published As

Publication number Publication date
DE2915091B1 (en) 1980-10-16
EP0017818A1 (en) 1980-10-29
DE2915091C2 (en) 1981-07-30
ES490472A0 (en) 1981-02-16
JPS6227495B2 (en) 1987-06-15
ES8103470A1 (en) 1981-02-16
GR67227B (en) 1981-06-25
JPS55146837A (en) 1980-11-15
ATE1562T1 (en) 1982-09-15

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