EP0513423B1 - Line protective circuit breaker with remote shunt-trip device - Google Patents

Line protective circuit breaker with remote shunt-trip device Download PDF

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Publication number
EP0513423B1
EP0513423B1 EP91108041A EP91108041A EP0513423B1 EP 0513423 B1 EP0513423 B1 EP 0513423B1 EP 91108041 A EP91108041 A EP 91108041A EP 91108041 A EP91108041 A EP 91108041A EP 0513423 B1 EP0513423 B1 EP 0513423B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
trip device
voltage
ptc thermistor
thermally sensitive
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
EP91108041A
Other languages
German (de)
French (fr)
Other versions
EP0513423A1 (en
Inventor
Anton Dipl.-Ing. Glas
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE59107254T priority Critical patent/DE59107254D1/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP91108041A priority patent/EP0513423B1/en
Priority to ES91108041T priority patent/ES2081387T3/en
Priority to AT91108041T priority patent/ATE133003T1/en
Priority to TR92/0416A priority patent/TR26683A/en
Priority to PT100484A priority patent/PT100484B/en
Priority to US07/884,029 priority patent/US5214405A/en
Publication of EP0513423A1 publication Critical patent/EP0513423A1/en
Application granted granted Critical
Publication of EP0513423B1 publication Critical patent/EP0513423B1/en
Priority to GR950403694T priority patent/GR3018645T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/164—Heating elements
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/206—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition with thermal shunt trip

Definitions

  • the invention relates to a circuit breaker that works at least with a thermal release.
  • Such circuit breakers are on the market in a wide variety of designs. You usually work with a switch lock, which can usually be released by a magnetic release and a thermal release, so that the switch contacts open. The drawn arc is usually extinguished in a quenching chamber.
  • the invention has for its object to develop a circuit breaker in which remote triggering is implemented in a particularly simple manner.
  • the thermal release with its thermally sensitive element is in thermally conductive contact with a PTC thermistor which can be applied to a voltage associated with suitable heating for a response of the thermally sensitive element .
  • the thermal release can be designed in a simple manner as a bimetal. Another force translator can also replace the switch lock.
  • the assigned voltage is applied to the PTC thermistor by remote tripping, it heats up to a value that triggers the thermal trigger.
  • a bimetal there is sufficient deflection, in the case of a switch lock, a pawl slides off the latching point and release the switch lock.
  • Remote tripping can be effected by means of a component based on the principle of operation of a relay in the circuit breaker or by externally applying a suitable voltage to the PTC thermistor.
  • the PTC thermistor limits the energy supply to the thermal release.
  • the PTC thermistor can be attached to a bimetal using a clip.
  • a circuit breaker 1 works with a thermal release 2, in the exemplary embodiment a bimetal as a thermally sensitive element 9.
  • a thermal release 2 in the exemplary embodiment a bimetal as a thermally sensitive element 9.
  • a PTC thermistor 3 to which a voltage associated with suitable heating can be applied by means of connecting lines 4.
  • the PTC thermistor 3 is fastened to the bimetal by means of a holding clip 5. If the bimetal of the thermal release 2 deflects in the direction of deflection 6 at the response temperature, a pawl 8 can drop under the release force 7.
  • the circuit breaker according to the invention enables remote tripping with a simple structure.
  • the usual existing components can be used for this.
  • the thermal release is suitable for remote tripping using AC voltage or DC voltage. If AC voltage is applied to the PTC thermistor, this avoids the usual magnetic hum that is normally used with magnetic triggers that are set up for remote tripping.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Burglar Alarm Systems (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)

Abstract

A line protection circuit breaker (1) which operates with at least one thermal trip device (2) which acts by means of a force converter, especially a latching mechanism, on switch contacts in an opening manner, the thermal trip device (2) operating with a thermally sensitive element (9), especially a bimetallic element, which is in heat-conducting contact with a PTC thermistor (3) which can be connected to a voltage which is allocated to provide suitable heating for the thermally sensitive element (9) to respond. <??>The voltage can be applied by a remote trip device. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Leitungsschutzschalter, der zumindest mit einem thermischen Auslöser arbeitet. Hierunter sollen hier auch andere Schutzschalter verstanden werden, die zumindest mit einem thermischen Auslöser arbeiten. Derartige Leitungsschutzschalter sind in den verschiedenartigsten Ausführungen auf dem Markt. Sie arbeiten in der Regel mit einem Schaltschloß, das üblicherweise durch einen magnetischen Auslöser und durch einen thermischen Auslöser entklinkt werden kann, so daß die Schaltkontakte öffnen. Üblicherweise wird der gezogene Lichtbogen in einer Löschkammer gelöscht.The invention relates to a circuit breaker that works at least with a thermal release. This should also be understood to mean other circuit breakers that work at least with a thermal release. Such circuit breakers are on the market in a wide variety of designs. You usually work with a switch lock, which can usually be released by a magnetic release and a thermal release, so that the switch contacts open. The drawn arc is usually extinguished in a quenching chamber.

Der Erfindung liegt die Aufgabe zugrunde einen Leitungsschutzschalter zu entwickeln, bei dem eine Fernauslösung in besonders einfacher Weise realisiert ist.The invention has for its object to develop a circuit breaker in which remote triggering is implemented in a particularly simple manner.

Die Lösung der geschilderten Aufgabe erfolgt nach der Erfindung durch einen Leitungsschutzschalter nach Patentanspruch 1. Hierbei steht der thermische Auslöser mit seinem thermisch empfindlichen Glied mit einem Kaltleiter in wärmeleitendem Kontakt, der an eine zur geeigneten Erwärmung für ein Ansprechen des thermisch empfindlichen Gliedes zugeordnete Spannung anlegbar ist. Der thermische Auslöser kann in einfacher Weise als Bimetall ausgeführt sein. Anstelle des Schaltschlosses kann auch ein anderer Kraftübersetzer treten.The solution of the described object is achieved according to the invention by a circuit breaker according to claim 1. Here, the thermal release with its thermally sensitive element is in thermally conductive contact with a PTC thermistor which can be applied to a voltage associated with suitable heating for a response of the thermally sensitive element . The thermal release can be designed in a simple manner as a bimetal. Another force translator can also replace the switch lock.

Wenn die zugeordnete Spannung an den Kaltleiter durch Fernauslösung angelegt wird, erwärmt sich dieser auf einen Wert, daß der thermische Auslöser anspricht. Bei einem Bimetall erfolgt eine Auslenkung die ausreicht, im Fall eines Schaltschlosses eine Klinke von der Verklinkungsstelle abgleiten zu lassen und das Schaltschloß zu entklinken. Die Fernauslösung kann mittels eines Bauteils nach dem Wirkungsprinzip eines Relais im Leitungsschutzschalter bewirkt werden oder durch externes Anlegen einer geeigneten Spannung an den Kaltleiter.If the assigned voltage is applied to the PTC thermistor by remote tripping, it heats up to a value that triggers the thermal trigger. In the case of a bimetal, there is sufficient deflection, in the case of a switch lock, a pawl slides off the latching point and release the switch lock. Remote tripping can be effected by means of a component based on the principle of operation of a relay in the circuit breaker or by externally applying a suitable voltage to the PTC thermistor.

Der Kaltleiter sorgt nach Erreichen seiner Kipptemperatur, bei der sein Widerstand sprungartig zunimmt, für eine Begrenzung der Energiezufuhr an den thermischen Auslöser.After reaching its tilting temperature, at which its resistance suddenly increases, the PTC thermistor limits the energy supply to the thermal release.

Der Kaltleiter kann an einem Bimetall mittels einer Klammer befestigt werden.The PTC thermistor can be attached to a bimetal using a clip.

Die Erfindung soll nun anhand eines in der Zeichnung grob schematisch wiedergegebenen Ausführungsbeispiels näher erläutert werden:The invention will now be explained in more detail using an exemplary embodiment shown roughly schematically in the drawing:

Ein Leitungsschutzschalter 1 arbeitet mit einem thermischen Auslöser 2, im Ausführungsbeispiel ein Bimetall als thermisch empfindliches Glied 9. In wärmeleitendem Kontakt hierzu steht ein Kaltleiter 3, an den mittels Anschlußleitungen 4 eine zur geeigneten Erwärmung zugeordnete Spannung angelegt werden kann. Der Kaltleiter 3 ist am Bimetall mittels einer Halteklammer 5 befestigt. Wenn sich das Bimetall des thermischen Auslösers 2 bei der Ansprechtemperatur in Auslenkrichtung 6 auslenkt, kann eine Klinke 8 unter der Entklinkungskraft 7 abfallen.A circuit breaker 1 works with a thermal release 2, in the exemplary embodiment a bimetal as a thermally sensitive element 9. In thermally conductive contact there is a PTC thermistor 3, to which a voltage associated with suitable heating can be applied by means of connecting lines 4. The PTC thermistor 3 is fastened to the bimetal by means of a holding clip 5. If the bimetal of the thermal release 2 deflects in the direction of deflection 6 at the response temperature, a pawl 8 can drop under the release force 7.

Der erfindungsgemäße Leitungsschutzschalter ermöglicht eine Fernauslösung bei einfachem Aufbau. Es können hierzu die üblichen vorhandenen Bauteile genutzt werden. Nach Erreichen des Kippunktes des Kaltleiters besteht lediglich ein geringer Leistungsbedarf, wobei für das Auslöseorgan ein Selbstschutz bereitgestellt ist. Der thermische Auslöser eignet sich für eine Fernauslösung durch Wechselspannung oder durch Gleichspannung. Wenn der Kaltleiter mit Wechselspannung beaufschlagt wird, vermeidet man das sonst bei Magnetauslösern, die für Fernauslösung eingerichtet sind, übliche Magnetbrummen.The circuit breaker according to the invention enables remote tripping with a simple structure. The usual existing components can be used for this. After reaching the tipping point of the PTC thermistor, there is only a low power requirement, with self-protection being provided for the triggering element. The thermal release is suitable for remote tripping using AC voltage or DC voltage. If AC voltage is applied to the PTC thermistor, this avoids the usual magnetic hum that is normally used with magnetic triggers that are set up for remote tripping.

Claims (2)

  1. Circuit breaker (1) which operates at least with a thermal tripping device (2) which acts in an opening manner on switching contacts by means of a power transmitter, in particular a breaker mechanism, whereby the thermal tripping device (2) operates with a thermally sensitive element (9), in particular a bimetallic element, which is in heat-conducting contact with a PTC thermistor (3), which can be applied to an external voltage by way of inherent terminals (4), which voltage is allocated for the suitable heating for operation of the thermally sensitive element (9).
  2. Circuit breaker according to claim 1, characterized in that the PTC thermistor (3) is fastened to a bimetallic element by means of a retaining clip (5).
EP91108041A 1991-05-17 1991-05-17 Line protective circuit breaker with remote shunt-trip device Expired - Lifetime EP0513423B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP91108041A EP0513423B1 (en) 1991-05-17 1991-05-17 Line protective circuit breaker with remote shunt-trip device
ES91108041T ES2081387T3 (en) 1991-05-17 1991-05-17 LINE PROTECTION SWITCH WITH REMOTE CONTROL.
AT91108041T ATE133003T1 (en) 1991-05-17 1991-05-17 CIRCUIT CIRCUIT BREAKER WITH REMOTE RELEASE
DE59107254T DE59107254D1 (en) 1991-05-17 1991-05-17 Miniature circuit breakers with remote tripping
TR92/0416A TR26683A (en) 1991-05-17 1992-04-29 REMOTE SHELTER LINE PROTECTION SWITCH
PT100484A PT100484B (en) 1991-05-17 1992-05-14 LINER PROTECTION BREAKER WITH DISTANCE SHUTTER
US07/884,029 US5214405A (en) 1991-05-17 1992-05-18 Miniature circuit-breaker with remote tripping
GR950403694T GR3018645T3 (en) 1991-05-17 1996-01-11 Line protective circuit breaker with remote shunt-trip device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91108041A EP0513423B1 (en) 1991-05-17 1991-05-17 Line protective circuit breaker with remote shunt-trip device

Publications (2)

Publication Number Publication Date
EP0513423A1 EP0513423A1 (en) 1992-11-19
EP0513423B1 true EP0513423B1 (en) 1996-01-10

Family

ID=8206739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108041A Expired - Lifetime EP0513423B1 (en) 1991-05-17 1991-05-17 Line protective circuit breaker with remote shunt-trip device

Country Status (8)

Country Link
US (1) US5214405A (en)
EP (1) EP0513423B1 (en)
AT (1) ATE133003T1 (en)
DE (1) DE59107254D1 (en)
ES (1) ES2081387T3 (en)
GR (1) GR3018645T3 (en)
PT (1) PT100484B (en)
TR (1) TR26683A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5933311A (en) * 1998-04-02 1999-08-03 Square D Company Circuit breaker including positive temperature coefficient resistivity elements having a reduced tolerance
US5886860A (en) * 1997-08-25 1999-03-23 Square D Company Circuit breakers with PTC (Positive Temperature Coefficient resistivity
US6020802A (en) * 1998-04-02 2000-02-01 Square D Company Circuit breaker including two magnetic coils and a positive temperature coefficient resistivity element
US6094126A (en) * 1999-06-08 2000-07-25 Sorenson; Richard W. Thermal circuit breaker switch
CN1276617A (en) * 1999-06-08 2000-12-13 理查德·W·索伦森 Thermal loop breaker switch
EP2620970A1 (en) 2012-01-26 2013-07-31 Eaton Industries GmbH Remote control with expansion member
DE102013005439A1 (en) * 2013-03-30 2014-04-10 Leoni Bordnetz-Systeme Gmbh Safety device for securing electric current path in electrical system of e.g. hybrid vehicle, has overload relays that are connected with shift element over mechanical coupling for interruption of current paths
CN105551904A (en) * 2016-01-22 2016-05-04 江苏常胜电器股份有限公司 Dual voltage current inlaid protector

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE571982C (en) * 1930-07-29 1933-03-09 Stotz Kontakt Gmbh Installation circuit breaker with release by a bimetal
DE666144C (en) * 1936-02-13 1938-10-13 Ernst Reich Dipl Ing Hand-operated single or multi-pole toggle lever switch with spring force switch designed as a thermal current limiter
DE735839C (en) * 1938-08-19 1943-05-28 Siemens Ag Temperature-dependent trigger
DE1513256B2 (en) * 1965-03-16 1971-02-11 Licentia Patent Verwaltungs GmbH, 6000 Frankfurt Bimetal device, especially bimetal trigger
DE1538689B2 (en) * 1966-08-27 1971-09-23 Licentia Gmbh THERMAL TRIGGER
US3614698A (en) * 1970-10-27 1971-10-19 Donald J Gardner Thermally actuated circuit delay switch
US3840834A (en) * 1972-12-18 1974-10-08 Texas Instruments Inc Protector/indicator using ptc heater and thermostatic bimetal combination
DE7327063U (en) * 1973-07-24 1973-12-06 Westfaelische Kupfer- Und Messingwerke Ag Fastening device for electrical heating from bimetal strips
DE7733309U1 (en) * 1977-10-28 1979-04-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Thermal release
DE3206462A1 (en) * 1982-02-23 1983-09-01 Siemens AG, 1000 Berlin und 8000 München Line protection circuit breaker
US4616206A (en) * 1984-09-07 1986-10-07 Eaton Corporation Circuit breaker and shunt trip apparatus combined within single pole device

Also Published As

Publication number Publication date
PT100484A (en) 1994-05-31
US5214405A (en) 1993-05-25
PT100484B (en) 1999-08-31
ES2081387T3 (en) 1996-03-01
TR26683A (en) 1995-03-15
EP0513423A1 (en) 1992-11-19
DE59107254D1 (en) 1996-02-22
ATE133003T1 (en) 1996-01-15
GR3018645T3 (en) 1996-04-30

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