DE2638011A1 - Temp. monitored switch contact set - provides circuit breaking at excessive switch assembly heating using suitable soldered joint - Google Patents

Temp. monitored switch contact set - provides circuit breaking at excessive switch assembly heating using suitable soldered joint

Info

Publication number
DE2638011A1
DE2638011A1 DE19762638011 DE2638011A DE2638011A1 DE 2638011 A1 DE2638011 A1 DE 2638011A1 DE 19762638011 DE19762638011 DE 19762638011 DE 2638011 A DE2638011 A DE 2638011A DE 2638011 A1 DE2638011 A1 DE 2638011A1
Authority
DE
Germany
Prior art keywords
contact
contact set
temp
contacts
circuit breaking
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.)
Granted
Application number
DE19762638011
Other languages
German (de)
Other versions
DE2638011B2 (en
DE2638011C3 (en
Inventor
Walter Klimt
Klaus Schnappinger
Wolf-Dietrich Vogt
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.)
EBERLE ANLAGEN KG 8500 NUERNBERG DE
Original Assignee
Eberle Werke KG
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
Application filed by Eberle Werke KG filed Critical Eberle Werke KG
Priority to DE19762638011 priority Critical patent/DE2638011B2/en
Publication of DE2638011A1 publication Critical patent/DE2638011A1/en
Publication of DE2638011B2 publication Critical patent/DE2638011B2/en
Application granted granted Critical
Publication of DE2638011C3 publication Critical patent/DE2638011C3/de
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H2001/506—Fail safe contacts, i.e. the contacts being kept in a safe position, usually in an open circuit position, at end of life time of switch

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

The contact set consists of a stationary and a moving contact, in a switch, in which excessive heating provides automatic contact breaking. Preferably a melting solder (8) is used for this purpose. Its melting temperature is selected in such manner as to prevent thermal overloading of the contacts. A preswstressed leaf spring (5) is released, when the melting temperature of the solder has been attained, with the result that the contacts are forcibly broken. The solder may directly conect one contact (7) to the contact support (4).

Description

Elektrisches SchaltgerätElectrical switchgear

Die Erfindung bezieht sich auf ein elektrisches Schaltgerät, dessen Kontakte auf unzulässige Erwärmung überwacht werden.The invention relates to an electrical switching device whose Contacts are monitored for impermissible heating.

Übermäßige Kontakterwärmungen, wie sie gegen Ende der Lebensdauer bei Schaltgeräten häufig auftreten, führen in vielen Fällen zu einer Überbeanspruchung nicht nur der Kontaktwerkstoffe, sondern auch der Trägermaterialien und der Isolierstoffe. Diese Beanspruchung kann ein Verschmoren und Verkohlen der Werkstoffe zur Folge haben. Besonders der steigende Einsatz von Kunststoffen zwingt dazu, Überlegungen zum Schutz dieser besonders gefährdeten Werkstoffe und ihrer Umgebung anzustellen.Excessive contact heating, as occurs towards the end of the service life occur frequently in switching devices, in many cases lead to overstressing not only the contact materials, but also the carrier materials and the insulating materials. This stress can result in scorching and charring of the materials to have. The increasing use of plastics in particular forces us to consider to protect these particularly endangered materials and their environment.

Gefährliche Kontakterwärmungen sind bei elektrischen Schaltgeräten in der Regel die Folge von Lichtbögen, die aufgrund verschiedenster Ursachen auftreten können. Natürlicher Kontaktabbrand, aber auch "schleichendes" Öffnen der Kontaktstücke, Staubpartikel auf den Kontakten oder ein nicht verlöschender Schaltfunke bei zu hoher Gleichstrombelastung sind Beispiele dafür.Contact heating is dangerous with electrical switching devices usually the result of arcs that occur due to various causes can. Natural contact erosion, but also "creeping" opening of the contact pieces, Dust particles on the contacts or a non-extinguishing switching spark when closed high DC loads are examples of this.

Aufgabe der Erfindung ist es nun, eine Vorrichtung zu schaffen, welche die an Schaltgeräten auftretenden Kontakterwärmungen durch rechtzeitiges Öffnen des Stromkreises in den normalen Grenzen hält.The object of the invention is now to create a device which the contact warming that occurs on switchgear due to timely opening of the circuit within normal limits.

Die Lösung der Aufgabe erfolgt erfindungsgemäß mit einer Anordnung bestehend aus einer vorgespannten Kontaktfeder, die durch ein Schmelzlot in ihrer Lage gehalten wird.The object is achieved according to the invention with an arrangement consisting of a pretensioned contact spring, which is secured by a fusible link in its Location is held.

Eine Ausführungsform der Erfindung wird nachfolgend anhand der Zeichnung beschrieben. Dabei sind bezeichnet mit: 1 eine bewegliche Kontaktfeder 2 ein Antriebsstift 3 ein Kontaktniet 4 ein fester Kontaktträger 5 eine vorgespannte Blattfeder 6 die gemeinsame Einspannstelle der Teile 4, 5, 9 7 ein Kontaktniet 8 das Schmelzlot 9 eine Isolierplatte 10 ein Anschlag Diese Teile sind als Kontaktsatz eines Schaltgerätes zu verstehen, wobei die Betätigung der beweglichen Kontaktfeder 1 über einen nicht näher bezeichneten Hebel durch den Stift 2 erfolgt. Der Antrieb kann z. B. durch einen Elektromagneten, ein Bimetall oder eine Druckdose geschehen, wobei die Kontaktfeder 1 dementsprechend als Blattfeder oder auch als Schnappfeder ausgebildet sein kann.An embodiment of the invention is described below with reference to the drawing described. The following are denoted by: 1 a movable contact spring 2 a drive pin 3 a contact rivet 4 a fixed contact carrier 5 a prestressed leaf spring 6 the common clamping point of the parts 4, 5, 9 7 a contact rivet 8 the fusible link 9 an insulating plate 10 a stop These parts are as a contact set of a switching device to understand, the actuation of the movable contact spring 1 via a not lever designated in more detail by the pin 2 takes place. The drive can, for. B. by an electromagnet, a bimetal or a pressure cell happen, the contact spring 1 can accordingly be designed as a leaf spring or as a snap spring.

Der feste Kontakt wird durch eine Blattfeder 5, dem Kontaktträger 4, dem Kontaktniet 7 und dem Schmelzlot 8 gebildet. Unter normalen Arbeitsbedingungen verbindet das Schmelzlot 8 den Kontakt 7 mit dem Kontaktträger 4. Erst bei einer Lichtbogenbildung - nicht bei dem normalen Schaltfunken - wird das Lot, dessen Schmelztemperatur entsprechend ausgewählt werden muß, flüssig, und die freigegebene Vorspannung der Blattfeder 5 öffnet die Kontakte 3,7 zwangsweise. Die Isolierplatte 9 dient als Anlage für die nachgebende Blattfeder 1, während der Anschlag 10 als Antriebsstop vorgesehen ist.The fixed contact is made by a leaf spring 5, the contact carrier 4, the contact rivet 7 and the fusible link 8 are formed. Under normal working conditions connects the fusible link 8 the contact 7 with the contact carrier 4. Only when one Arcing - not the normal one Switching sparks - it will Solder, the melting temperature of which must be selected accordingly, liquid, and the Released bias of the leaf spring 5 forcibly opens the contacts 3.7. the Insulating plate 9 serves as a system for the yielding leaf spring 1, while the stop 10 is provided as a drive stop.

Da das Schmelzlot nach dieser Anordunung in direktem Wärmekontakt mit dem Kontaktniet 7 steht, wird jede Temperaturänderung an den Kontakten sofort an das Schmelzlot weitergeleitet, so daß ein schnelles Ansprechen des Lotes gewährleistet ist.Since the fusible link is in direct thermal contact after this arrangement with the contact rivet 7, any temperature change at the contacts is immediate forwarded to the fusible link, so that a quick response of the solder is guaranteed is.

Claims (4)

Patentansprüche 1., Kontaktsatz eines elektrischen Schaltgerätes mit einem festen und einem beweglichen Kontaktstück, dadurch gekennzeichnet, daß sich bei unzulässiger Erwärumung der Kontakte (1,4) diese selbsttätig öffnen. Claims 1., contact set of an electrical switching device with a fixed and a movable contact piece, characterized in that If the contacts (1,4) are not heated up, they will open automatically. 2. Kontaktsatz nach Anspruch 1, dadurch gekennzeichnet, daß der Abschaltvorgang von eimen Schmelzlot(8) eingeleitet wird, dessen Schmelztemperatur so ausgewählt wird, daß eine thermische Überanspruchung der Kontaktteile nicht erfolgen kann. 2. Contact set according to claim 1, characterized in that the shutdown process is initiated by a fusible link (8), the melting temperature of which is selected becomes that a thermal overload of the contact parts cannot occur. 3. Kontaktsatz nach Anspruch 1 und 2, dadurch gekennzeichnet, daß eine vorgespannte Blattfeder (5) bei Erreichen der Schmelztemperatur des Schmelz lotes (8) freigegeben wird, wodurch sich die Kontakte (3,7) zwangsweise öffnen. 3. Contact set according to claim 1 and 2, characterized in that a pretensioned leaf spring (5) when the melting temperature of the enamel is reached lotes (8) is released, whereby the contacts (3,7) forcibly open. 4. Kontaktsatz nach Anspruch 1 - 3, dadurch gekennzeichnet, daß das Schmelzlot (8) direkt das Kontaktstück (7) mit dem Kontaktträger (4) verbindet. 4. Contact set according to claim 1-3, characterized in that the Fusible link (8) directly connects the contact piece (7) to the contact carrier (4).
DE19762638011 1976-08-24 1976-08-24 Contact set of an electrical switching device Granted DE2638011B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762638011 DE2638011B2 (en) 1976-08-24 1976-08-24 Contact set of an electrical switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762638011 DE2638011B2 (en) 1976-08-24 1976-08-24 Contact set of an electrical switching device

Publications (3)

Publication Number Publication Date
DE2638011A1 true DE2638011A1 (en) 1978-03-02
DE2638011B2 DE2638011B2 (en) 1978-08-17
DE2638011C3 DE2638011C3 (en) 1980-10-02

Family

ID=5986199

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762638011 Granted DE2638011B2 (en) 1976-08-24 1976-08-24 Contact set of an electrical switching device

Country Status (1)

Country Link
DE (1) DE2638011B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3346298A1 (en) * 1983-01-03 1984-07-05 Elmwood Sensors Inc., 02861 Pawtucket, R.I. THERMOSTAT SWITCH
DE3439906A1 (en) * 1984-10-31 1986-04-30 Gerhard 8130 Starnberg Burkardt Electrical plug connector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3114672C2 (en) * 1981-04-10 1983-07-21 Siemens AG, 1000 Berlin und 8000 München "Wiper contact arrangement"

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3346298A1 (en) * 1983-01-03 1984-07-05 Elmwood Sensors Inc., 02861 Pawtucket, R.I. THERMOSTAT SWITCH
DE3346298C2 (en) * 1983-01-03 1987-09-24 Elmwood Sensors Inc., Pawtucket, R.I., Us
DE3439906A1 (en) * 1984-10-31 1986-04-30 Gerhard 8130 Starnberg Burkardt Electrical plug connector

Also Published As

Publication number Publication date
DE2638011B2 (en) 1978-08-17
DE2638011C3 (en) 1980-10-02

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Legal Events

Date Code Title Description
OAP Request for examination filed
OD Request for examination
C3 Grant after two publication steps (3rd publication)
8320 Willingness to grant licences declared (paragraph 23)
8327 Change in the person/name/address of the patent owner

Owner name: EBERLE ANLAGEN KG, 8500 NUERNBERG, DE

8339 Ceased/non-payment of the annual fee