EP1166305B1 - Circuit provided with a protective function - Google Patents

Circuit provided with a protective function Download PDF

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Publication number
EP1166305B1
EP1166305B1 EP00917008A EP00917008A EP1166305B1 EP 1166305 B1 EP1166305 B1 EP 1166305B1 EP 00917008 A EP00917008 A EP 00917008A EP 00917008 A EP00917008 A EP 00917008A EP 1166305 B1 EP1166305 B1 EP 1166305B1
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EP
European Patent Office
Prior art keywords
make contact
circuit
main
contact elements
contacts
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
EP00917008A
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German (de)
French (fr)
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EP1166305A1 (en
Inventor
Jürgen BEHRENS
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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Publication date
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Publication of EP1166305A1 publication Critical patent/EP1166305A1/en
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Publication of EP1166305B1 publication Critical patent/EP1166305B1/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
    • H01H47/005—Safety control circuits therefor, e.g. chain of relays mutually monitoring each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices

Definitions

  • the invention relates to a circuit arrangement with a safety function, the Contains at least two power contactors, which are arranged in release circuits Have main make contacts, each having a main make contact a contactor with a main normally open contact of another Power contactor is connected in series in the respective enabling circuit.
  • a circuit of the beginning mentioned type, but which contains positively driven relays, is from the DE 39 37 122 C2 known.
  • For contactors is a forced operation of main and auxiliary contacts due to the design not possible.
  • each coil of each power contactor is provided, the Normally open contacts can be operated together, and that the main normally open contacts each contactor is arranged between two auxiliary switch blocks which each have a make contact and a break contact, which are designed as positively driven contacts, the normally open contacts of all auxiliary switch blocks connected in series in a first signaling circuit are arranged and the break contacts of all auxiliary switch blocks in series switched are arranged in a second reporting circuit, and wherein the contacts of contactors and associated auxiliary switch blocks on one common contact bridge are set.
  • the circuit arrangement according to Figure 1 contains two power contactors, the Coils are designated K1 and K2.
  • Each of the coils K1, K2 is in one Circuit 1 or 1 'arranged, which by a normally open contact S1 or S2 can be closed via the query circuit 7. They work Normally open contacts S1 and S2 not directly on the contactors, but to the query circuit 7 as a safety-related shutdown for channels 1 and 2 ( Figure 2). In Figure 1, this is due to the hatching for the query circuit 7 in lines 1 and 1 '.
  • the normally open contacts S1 and S2 can be operated by a manual button 5.
  • the contactors are with their main normally open contacts H11, H12, H13 and H21, H22, H23 in the enabling circuits (collectively referred to here as 4) between auxiliary switch blocks, each auxiliary switch block a pair of contacts T1, V1; T3, V3; T2, V2; T4, V4 from make contact T1, T3, T2, T4 and NC contact V1, V3, V2, V4 contains.
  • the contacts of each auxiliary switch block are self-guided, i.e. NC contact and NO contact can be in the normal operation, never both open or both closed.
  • the normally open contacts T1, T3 and T2, T4 are connected in series in a first signaling circuit 2 arranged. This zone 2 provides information about the active position.
  • the normally closed contacts V1, V3 or V2, V4, again connected in series, are arranged in a second reporting circuit 3.
  • This zone 3 provides information about the passive position.
  • the information from the reporting circles 2 and 3 is monitored and evaluated by a query circuit 7. Since the Circuit arrangement with safety function according to the present invention does not meet the requirement for isolating properties, is in the enabling circuits 4 a main switch 6 is provided.
  • Figure 1 shows the circuit arrangement in the de-energized state, in which the coils K1, K2 are de-energized, a current flows in the alarm circuit 3 and the alarm circuit 2 is interrupted. If button 5 is now pressed, the normally open contacts S1 and S2 closed. The coils K1 and K2 are excited Sagittarius pull on. The normally open contacts T1, T3 and T2, T4, while the normally closed contacts V1, V3 or V2, V4 open. The main normally open contacts H11, H12, H13, H21, H22, H23 of the enabling circuit 4 will be closed. If button 5 is not pressed, it will normally turn itself on the conditions of the de-energized state again.
  • Figure 2 shows how two power contactors redundant and self-monitoring are connected.
  • the components of the OSSDs are K1M, K2M designated by auxiliary contactors with HK1, HK2, HK3, HK4.
  • a time module K1T which is used to bypass the contactors for starting, also has positively driven contacts.
  • the redundant design ensures functional reliability the circuit, even if one of the self-monitoring Contactors completely failed.
  • Figures 3 and 4 schematically show accidents. It's one at a time Main normally open contacts arranged between two auxiliary switching blocks B1 and B2 a contactor.
  • Figure 3 shows the fault that one of the main normally open contacts H11 welds. Due to the inclined contact bridge 8, the break contact can Close V3 again and would always signal an enable.
  • the normally closed contact V1 arranged in the same signaling circuit 3, however spatially close to the main normally open contact H11 remains open, so that in Message circuit 3 no current flows, which is recognized by the query circuit 7 ( Figure 1) becomes.
  • the normally open contact T3 opens accordingly, but since the normally open contact T1 remains closed, the fault is also detected in zone 2.
  • the main make contacts H12 and H13 are welded the NC and NO contacts of the auxiliary contactors behave accordingly.
  • Figure 4 illustrates the situation when one of the contacts of an auxiliary switch block welded, as an example the normally closed contact V1.
  • the contact V1 bends strongly but without opening, and all other contacts except T1 go into their active position.
  • the Control of the active position via the message line 2 reports because of the open normally open contact T11 the error, and after a short start-up bypass
  • the power contactor goes via the time module K1T ( Figure 2) in the off position.
  • the circuit arrangement of the invention fulfills the requirement for a Individual errors must be recognized by executing the safety function. Furthermore, it meets the requirements for preventive devices of an unexpected start. With a suitable design of the query circuit the demands for protection against unauthorized, unintentional and / or erroneous closing. The separator properties Circuit arrangement, however, is therefore not the main switch required in the enabling circuits.

Landscapes

  • Keying Circuit Devices (AREA)
  • Burglar Alarm Systems (AREA)
  • Protection Of Static Devices (AREA)
  • Safety Devices In Control Systems (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Relay Circuits (AREA)
  • Control Of Combustion (AREA)
  • Air Bags (AREA)

Abstract

A protective circuit arrangement includes at least two power contactors that have main make contact elements arranged in enable circuits. Each main make contact element of a power contactor is connected in series to a main make contact element of another power contactor in each respective enable current circuit. A respective coil circuit make contact element is provided in the coil current circuit of each coil of each power contactor, whereby the coil circuit make contact elements can be jointly actuated. The main make contact elements of each power contactor are disposed between two respective auxiliary contact units which each have a respective make contact element and a respective break contact element, and which are respectively configured as positively driven contacts. The make contact elements of all auxiliary contact units arc connected in series in a first indicator circuit, and the break contact elements of all auxiliary contact units are connected in series in a second indicator circuit. The main make contact elements and the contacts of the assigned auxiliary contact units are fixed on a common contact bridge.

Description

Technisches GebietTechnical field

Die Erfindung betrifft eine Schaltungsanordnung mit Sicherheitsfunktion, die mindestens zwei Leistungsschütze enthält, die in Freigabestromkreisen angeordnete Haupt-Schließerkontakte aufweisen, wobei jeweils ein Haupt-Schließerkontakt eines Leistungsschütz mit einem Haupt-Schließerkontakt eines anderen Leistungsschütz im jeweiligen Freigabestromkreis in Reihe gelegt ist.The invention relates to a circuit arrangement with a safety function, the Contains at least two power contactors, which are arranged in release circuits Have main make contacts, each having a main make contact a contactor with a main normally open contact of another Power contactor is connected in series in the respective enabling circuit.

Stand der TechnikState of the art

Bei Schaltungsanordnungen mit Sicherheitsfunktionen liegt das Ziel darin, einerseits Einzelfehler durch Ausführung der Sicherheitsfunktion zu erkennen, andererseits aber auch, den unerwarteten Anlauf zu verhindern. Auch sollte der Schutz vor unbefugtem, unbeabsichtigtem oder irrtümlichen Schließen Gefahr bringender Stromkreise gewährleistet sein. Eine Schaltung der eingangs genannten Gattung, die aber zwangsgeführte Relais enthält, ist aus der DE 39 37 122 C2 bekannt. Dort wird eine sogenannte Fail-Safe-Schaltung durch ein fehlersicheres UND-Glied realisiert, das nur zu den Spulen der zwangsgeführten Relais durchschaltet, wenn der geforderte sichere Zustand vorliegt, d.h. keine der Komponenten einen Defekt aufweist. Bei Leistungsschützen ist eine Zwangsführung von Haupt- und Hilfskontakten bauartbedingt nicht möglich. With circuit arrangements with safety functions, the goal is, on the one hand Detect individual errors by executing the safety function on the other hand also to prevent the unexpected start-up. Also should protection against unauthorized, unintentional or erroneous closing Dangerous circuits can be guaranteed. A circuit of the beginning mentioned type, but which contains positively driven relays, is from the DE 39 37 122 C2 known. There is a so-called fail-safe circuit realized by a fail-safe AND gate that only connects to the coils of the positively driven relay switches through when the required safe state is present, i.e. none of the components are defective. For contactors is a forced operation of main and auxiliary contacts due to the design not possible.

Darstellung der ErfindungPresentation of the invention

Es ist daher die Aufgabe der Erfindung, eine Schaltungsanordnung mit Sicherheitsfunktion zur Verfügung zu stellen, die die obengenannten Kriterien erfüllt und sich insbesondere für Leistungsschütze eignet.It is therefore the object of the invention to provide a circuit arrangement with a safety function to provide the above criteria fulfilled and is particularly suitable for contactors.

Ausgehend von einer Schaltungsanordnung der eingangs genannten Art wird die Aufgabe erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches gelöst.Starting from a circuit arrangement of the type mentioned the task according to the invention by the characterizing features of the claim solved.

Erfindungsgemäß ist vorgesehen, daß jeweils ein Schließerkontakt im Spulenstromkreis jeder Spule jedes Leistungsschützes vorgesehen ist, wobei die Schließerkontakte gemeinsam betätigbar sind, und daß die Haupt-Schließerkontakte jedes Leistungsschütz zwischen zwei Hilfsschalterblocks angeordnet ist, die jeweils einen Schließerkontakt und einen Öffnerkontakt aufweisen, welche als zwangsgeführte Kontakte ausgebildet sind, wobei die Schließerkontakte aller Hilfsschalterblocks in Reihe geschaltet in einem ersten Meldekreis angeordnet sind und die Öffnerkontakte aller Hilfsschalterblocks in Reihe geschaltet in einem zweiten Meldekreis angeordnet sind, und wobei die Kontakte von Leistungsschützen und zugeordneten Hilfsschalterblocks auf einer gemeinsamen Kontaktbrücke festgelegt sind.According to the invention it is provided that in each case one make contact in the coil circuit each coil of each power contactor is provided, the Normally open contacts can be operated together, and that the main normally open contacts each contactor is arranged between two auxiliary switch blocks which each have a make contact and a break contact, which are designed as positively driven contacts, the normally open contacts of all auxiliary switch blocks connected in series in a first signaling circuit are arranged and the break contacts of all auxiliary switch blocks in series switched are arranged in a second reporting circuit, and wherein the contacts of contactors and associated auxiliary switch blocks on one common contact bridge are set.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden, anhand von Figuren erläuterten Ausführungsbeispiel. Es zeigen

Figur 1:
schematisiert eine Schaltungsanordnung nach einer Ausführungsform der Erfindung;
Figur 2:
die Verschaltung der selbstüberwachenden Leistungsschütze in redundanter Auslegung;
Figur 3:
ein Schemabild eines zwischen Hilfsschalterblocks angeordneten Leistungsschützes für die Schaltungsanordnung nach der Erfindung, das einen ersten Störfall darstellt, bei dem Hauptkontakte des Leistungsschütze verschweißt sind;
Figur 4:
ein Schemabild eines zwischen Hilfsschalterblocks angeordneten Leistungsschützes für die Schaltungsanordnung nach der Erfindung, das einen zweiten Störfall darstellt, bei dem ein Kontakt eines Hilfsschalterblocks verschweißt ist.
Further details and advantages of the invention result from the following exemplary embodiment explained with reference to figures. Show it
Figure 1:
schematically a circuit arrangement according to an embodiment of the invention;
Figure 2:
the interconnection of the self-monitoring contactors in a redundant design;
Figure 3:
a schematic image of a power contactor arranged between the auxiliary switch block for the circuit arrangement according to the invention, which represents a first fault in which the main contacts of the power contactor are welded;
Figure 4:
a schematic image of a power contactor arranged between the auxiliary switch block for the circuit arrangement according to the invention, which represents a second fault in which a contact of an auxiliary switch block is welded.

Bester Weg zur Ausführung der ErfindungBest way to carry out the invention

Die Schaltungsanordnung nach Figur 1 enthält zwei Leistungsschütze, deren Spulen mit K1 und K2 bezeichnet sind. Jede der Spulen K1, K2 ist in einem Stromkreis 1 bzw. 1' angeordnet, der durch einen Schließerkontakt S1 bzw. S2 über die Abfrageschaltung 7 geschlossen werden kann. Es wirken die Schließerkontakte S1 und S2 also nicht direkt auf die Leistungsschütze, sondern auf die Abfrageschaltung 7 als sicherheitsgerichtete Abschaltung für Kanäle 1 und 2 (Figur 2). In Figur 1 ist dies durch die Schraffuren für die Abfrageschaltung 7 in den Leitungen 1 und 1' veranschaulicht. Die Schließerkontakte S1 und S2 können durch einen Handtaster 5 betätigt werden. Die Leistungsschütze liegen mit ihren Haupt-Schließerkontakten H11, H12, H13 und H21, H22, H23 in den Freigabestromkreisen (hier gesammelt mit 4 bezeichnet) zwischen Hilfsschalterblocks, wobei jeder Hilfsschalterblock ein Kontaktpaar T1, V1; T3, V3; T2, V2; T4, V4 aus Schließerkontakt T1, T3, T2, T4 und Öffnerkontakt V1, V3, V2, V4 enthält. Die Kontakte jedes Hilfsschalterblocks sind in sich zwangsgeführt, d.h. Öffnerkontakt und Schließerkontakt können im normalen Betrieb nie beide offen oder beide geschlossen sein. Die Schließerkontakte T1, T3 bzw. T2, T4 sind in Reihe geschaltet in einem ersten Meldekreis 2 angeordnet. Dieser Meldekreis 2 gibt Information über die Aktivstellung. Die Öffnerkontakte V1, V3 bzw. V2, V4, wiederum in Reihe geschaltet, sind in einem zweiten Meldekreis 3 angeordnet. Dieser Meldekreis 3 gibt Information über die Passivstellung. Die Information aus den Meldekreisen 2 und 3 wird von einer Abfrageschaltung 7 überwacht und ausgewertet. Da die Schaltungsanordnung mit Sicherheitsfunktion gemäß der vorliegenden Erfindung nicht die Forderung nach Trennereigenschaften erfüllt, ist in den Freigabestromkreisen 4 ein Hauptschalter 6 vorgesehen.The circuit arrangement according to Figure 1 contains two power contactors, the Coils are designated K1 and K2. Each of the coils K1, K2 is in one Circuit 1 or 1 'arranged, which by a normally open contact S1 or S2 can be closed via the query circuit 7. They work Normally open contacts S1 and S2 not directly on the contactors, but to the query circuit 7 as a safety-related shutdown for channels 1 and 2 (Figure 2). In Figure 1, this is due to the hatching for the query circuit 7 in lines 1 and 1 '. The normally open contacts S1 and S2 can be operated by a manual button 5. The contactors are with their main normally open contacts H11, H12, H13 and H21, H22, H23 in the enabling circuits (collectively referred to here as 4) between auxiliary switch blocks, each auxiliary switch block a pair of contacts T1, V1; T3, V3; T2, V2; T4, V4 from make contact T1, T3, T2, T4 and NC contact V1, V3, V2, V4 contains. The contacts of each auxiliary switch block are self-guided, i.e. NC contact and NO contact can be in the normal operation, never both open or both closed. The normally open contacts T1, T3 and T2, T4 are connected in series in a first signaling circuit 2 arranged. This zone 2 provides information about the active position. The normally closed contacts V1, V3 or V2, V4, again connected in series, are arranged in a second reporting circuit 3. This zone 3 provides information about the passive position. The information from the reporting circles 2 and 3 is monitored and evaluated by a query circuit 7. Since the Circuit arrangement with safety function according to the present invention does not meet the requirement for isolating properties, is in the enabling circuits 4 a main switch 6 is provided.

Figur 1 zeigt die Schaltungsanordnung im entregten Zustand, in der die Spulen K1, K2 stromlos sind, ein Strom im Meldekreis 3 fließt und der Meldekreis 2 unterbrochen ist. Wird nun der Taster 5 betätigt, werden die Schließerkontakte S1 und S2 geschlossen. Die Spulen K1 und K2 werden angeregt, die Schütze ziehen an. Dabei schließen sich die Schließerkontakte T1, T3 bzw. T2, T4, während die Öffnerkontakte V1, V3 bzw. V2, V4 öffnen. Die Haupt-Schließerkontakte H11, H12, H13, H21, H22, H23 des Freigabestromkreises 4 werden geschlossen. Wird der Taster 5 nicht betätigt, stellen sich im Normalfall die Verhältnisse des entregten Zustandes wieder ein.Figure 1 shows the circuit arrangement in the de-energized state, in which the coils K1, K2 are de-energized, a current flows in the alarm circuit 3 and the alarm circuit 2 is interrupted. If button 5 is now pressed, the normally open contacts S1 and S2 closed. The coils K1 and K2 are excited Sagittarius pull on. The normally open contacts T1, T3 and T2, T4, while the normally closed contacts V1, V3 or V2, V4 open. The main normally open contacts H11, H12, H13, H21, H22, H23 of the enabling circuit 4 will be closed. If button 5 is not pressed, it will normally turn itself on the conditions of the de-energized state again.

Figur 2 zeigt, wie zwei Leistungsschütze redundant und selbstüberwachend verschaltet sind. Die Komponenten der Freigabekreise sind mit K1M, K2M bezeichnet, die von Hilfsschützen mit HK1, HK2, HK3, HK4. Ein Zeitbaustein K1T, der zur Anlaufüberbrückung für die Leistungsschütze dient, hat ebenfalls zwangsgeführte Kontakte. Durch die redundante Auslegung ist die Funktionssicherheit der Schaltung gewährleistet, selbst wenn eines der selbstüberwachenden Leistungsschütze vollständig versagt.Figure 2 shows how two power contactors redundant and self-monitoring are connected. The components of the OSSDs are K1M, K2M designated by auxiliary contactors with HK1, HK2, HK3, HK4. A time module K1T, which is used to bypass the contactors for starting, also has positively driven contacts. The redundant design ensures functional reliability the circuit, even if one of the self-monitoring Contactors completely failed.

Die Figuren 3 und 4 zeigen in schematischer Weise Störfälle. Es ist jeweils ein zwischen zwei Hilfsschaltblocks B1 und B2 angeordnete Haupt-Schließerkontakte eines Leistungsschütz dargestellt.Figures 3 and 4 schematically show accidents. It's one at a time Main normally open contacts arranged between two auxiliary switching blocks B1 and B2 a contactor.

Figur 3 zeigt den Störfall, daß einer der Haupt-Schließerkontakte H11 verschweißt. Durch die sich schräg stellende Kontaktbrücke 8 kann sich der Öffnerkontakt V3 wieder schließen und würde grundsätzlich eine Freigabe signalisieren. Der im selben Meldekreis 3 angeordnete Öffnerkontakt V1 jedoch, der räumlich nahe am Haupt-Schließerkontakt H11 liegt, bleibt offen, so daß im Meldekreis 3 kein Strom fließt, was von der Abfrageschaltung 7 (Figur 1) erkannt wird. Entsprechend öffnet der Schließerkontakt T3, da aber der Schließerkontakt T1 geschlossen bleibt, wird der Fehler auch im Meldekreis 2 erkannt. Bei einem Verschweißen der Haupt-Schließerkontakte H12 und H13 verhalten sich die Öffner- und Schließkontakte der Hilfsschütze entsprechend.Figure 3 shows the fault that one of the main normally open contacts H11 welds. Due to the inclined contact bridge 8, the break contact can Close V3 again and would always signal an enable. The normally closed contact V1 arranged in the same signaling circuit 3, however spatially close to the main normally open contact H11 remains open, so that in Message circuit 3 no current flows, which is recognized by the query circuit 7 (Figure 1) becomes. The normally open contact T3 opens accordingly, but since the normally open contact T1 remains closed, the fault is also detected in zone 2. When the main make contacts H12 and H13 are welded the NC and NO contacts of the auxiliary contactors behave accordingly.

Figur 4 veranschaulicht die Situation, wenn einer der Kontakte eines Hilfsschalterblocks verschweißt, hier als Beispiel der Öffnerkontakt V1. Durch die starke Anzugskraft verbiegt sich der Kontakt V1, ohne allerdings zu öffnen, und sämtliche weiteren Kontakte bis auf T1 gehen in ihre Aktivstellung. Die Kontrolle der Aktivstellung über die Meldeleitung 2 meldet jedoch wegen des geöffneten Schließerkontaktes T11 den Fehler, und nach einer kurzen Anlaufüberbrückung über den Zeitbaustein K1T (Figur 2) geht das Leistungsschütz in die Aus-Position.Figure 4 illustrates the situation when one of the contacts of an auxiliary switch block welded, as an example the normally closed contact V1. Through the contact V1 bends strongly but without opening, and all other contacts except T1 go into their active position. The Control of the active position via the message line 2 reports because of the open normally open contact T11 the error, and after a short start-up bypass The power contactor goes via the time module K1T (Figure 2) in the off position.

Die Schaltungsanordnung der Erfindung erfüllt die Forderung, nach der ein Einzelfehler durch Ausführung der Sicherheitsfunktion erkannt werden muß. Weiterhin erfüllt sie die Forderungen für Ausschalteinrichtungen zum Verhindern von unerwartetem Anlauf. Bei geeigneter Auslegung der Abfrageschaltung werden auch die Forderungen nach Schutz vor unbefugtem, unbeabsichtigtem und/oder irrtümlichem Schließen erfüllt. Trennereigenschaften hat die Schaltungsanordnung allerdings nicht, daher ist nach wie vor der Hauptschalter in den Freigabestromkreisen erforderlich.The circuit arrangement of the invention fulfills the requirement for a Individual errors must be recognized by executing the safety function. Furthermore, it meets the requirements for preventive devices of an unexpected start. With a suitable design of the query circuit the demands for protection against unauthorized, unintentional and / or erroneous closing. The separator properties Circuit arrangement, however, is therefore not the main switch required in the enabling circuits.

Claims (1)

  1. A circuit provided with a protective function including at least two power contactors which have main make contact elements arranged in enable circuits (4), in each case one main make contact element (H11; H12; H13) of a power contactor being connected in series with a main make contact element (H21; H22; H23) of another power contactor in the respective enable circuit (4), characterized in that in each case one make contact element (S1; S2) is provided in the coil circuit (1; 1') of each coil (K1; K2) of each power contactor, the make contact elements (S1, S2) being capable of being jointly actuated, and in that the main make contact elements (H11, H12, H13 or H21, H22; H23) of each power contactor are spatially arranged between two auxiliary contact units (B1; B2) which each have a make contact element (T1; T3 or T2; T4) and a break contact element (V1; V3 or V2; V4) which are designed as positively driven contacts, the make contact elements (T1, T2, T3, T4) of all auxiliary contact units (B1, B2) being connected in series in a first indicator circuit (2) and the break contact elements (V1, V2, V3, V4) of all auxiliary contact units (B1, B2) being connected in series in a second indicator circuit (3), and the main make contact elements (H11, H12, H13 or H21, H22, H23) and the contact elements (T1, V1, T3, V3 or T2, V2, T4, V4) of the associated auxiliary contact units (B1, B2) being fixed on a common contact bridge (8).
EP00917008A 1999-04-03 2000-03-29 Circuit provided with a protective function Expired - Lifetime EP1166305B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19915234 1999-04-03
DE19915234A DE19915234A1 (en) 1999-04-03 1999-04-03 Circuit arrangement with security function to recognize individual errors and prevent unexpected attempt of unauthorized, unintentional or erroneous switching-off
PCT/EP2000/002735 WO2000060623A1 (en) 1999-04-03 2000-03-29 Circuit provided with a protective function

Publications (2)

Publication Number Publication Date
EP1166305A1 EP1166305A1 (en) 2002-01-02
EP1166305B1 true EP1166305B1 (en) 2002-12-18

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EP00917008A Expired - Lifetime EP1166305B1 (en) 1999-04-03 2000-03-29 Circuit provided with a protective function

Country Status (8)

Country Link
US (1) US6614635B2 (en)
EP (1) EP1166305B1 (en)
JP (1) JP2002541755A (en)
CN (1) CN1179390C (en)
AT (1) ATE230156T1 (en)
AU (1) AU3815300A (en)
DE (2) DE19915234A1 (en)
WO (1) WO2000060623A1 (en)

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DE102015104211A1 (en) * 2015-03-20 2016-09-22 Pilz Gmbh & Co. Kg Safety switching device for fail-safe disconnection of an electrical load
EP3196913B1 (en) 2016-01-20 2019-04-10 Schneider Electric Industries SAS Relay circuit and method for performing self-test of relay circuit
MX2022014583A (en) 2016-07-06 2023-02-01 Hubbell Inc Power switch enclosure.

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US4762663A (en) * 1986-04-08 1988-08-09 Westinghouse Electric Corp. Self-testing monitoring circuit
DE3619723A1 (en) * 1986-06-12 1987-12-17 Kloeckner Moeller Elektrizit Additional controller, having contacts, for safety circuits
DE3937122C2 (en) * 1989-11-10 1997-12-18 Elan Schaltelemente Gmbh Circuit arrangement with safety function
DE19603310A1 (en) * 1996-01-31 1997-08-07 Siemens Ag Method for determining the remaining service life of contacts in switchgear and associated arrangement
JP3506590B2 (en) * 1997-10-03 2004-03-15 三菱電機株式会社 Motor emergency stop device

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US20020011888A1 (en) 2002-01-31
ATE230156T1 (en) 2003-01-15
WO2000060623A1 (en) 2000-10-12
JP2002541755A (en) 2002-12-03
DE50000972D1 (en) 2003-01-30
US6614635B2 (en) 2003-09-02
CN1179390C (en) 2004-12-08
AU3815300A (en) 2000-10-23
DE19915234A1 (en) 2000-10-05
CN1346502A (en) 2002-04-24
EP1166305A1 (en) 2002-01-02

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