DE926798C - Contact arrangement - Google Patents
Contact arrangementInfo
- Publication number
- DE926798C DE926798C DES6488D DES0006488D DE926798C DE 926798 C DE926798 C DE 926798C DE S6488 D DES6488 D DE S6488D DE S0006488 D DES0006488 D DE S0006488D DE 926798 C DE926798 C DE 926798C
- Authority
- DE
- Germany
- Prior art keywords
- contacts
- contact
- contact arrangement
- another
- individual
- 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
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H2001/0005—Redundant contact pairs in one switch for safety reasons
Landscapes
- Contacts (AREA)
Description
Kontaktanordnung Beim Schließen von elektrischen Kontakten werden die Kontaktmassen mit erheblicher Geschwindigkeit aufeinandergestoßen, so daß in den meisten Fällen eine Reflexion in Form eines sogenannten Prellens auftritt. Die Kontakte berühren sich hierbei zunächst nur kurzzeitig, heben sich dann wieder voneinander ab, werden dann durch die Einschaltkraft wieder in Berührung gebracht, prellen wieder zurück, oft mehrmals nacheinander, bis endlich eine dauernde Berührung bestehenbleibt. Hierbei folgen auf den ersten Einschaltvorgang kurzzeitige Stromunterbrechungen mit Lichtlogen- und Schmelzbrückenbildung, was ungünstiges Arbeiten der Schalteinrichtung ergibt, das unangenehme Auswirkungen, insbesondere einen Abbrand der Kontakte zur Folge haben kann. Es sind zur Vermeidung eines solchen Prellens der Kontakte schon verschiedene Vorschläge gemacht worden, die aber meist einen großen Aufwand bedingen und auch nicht in allen Fällen anwendbar sind.Contact arrangement When electrical contacts are closed the contact masses collided with each other at considerable speed, so that in in most cases a reflection occurs in the form of a so-called bouncing. the Contacts initially only touch each other for a short time, then rise from each other again off, are then brought into contact again by the switching force, bounce again back, often several times in a row, until finally a permanent contact persists. Brief power interruptions follow the first switch-on process with the formation of light boxes and fusible links, which means that the switching device works unfavorably results in unpleasant effects, in particular a burn-off of the contacts to Can have a consequence. There are already to avoid such bouncing of the contacts various suggestions have been made, but most of them require a great deal of effort and are also not applicable in all cases.
lach der Erfindung können die erwähnten Nachteile dadurch vermieden werden, daß die Kontakta:lordnung in eine Vielzahl zueinander parallel arbeitender Einzelkontakte aufgelöst wird, die untereinander verschiedene Prelleigenschaften haben. Hierzu können die einzelnen Kontakte z. B. mit @ oneinander abweichender Masse ausgeführt werden. so daß sich verschiedene Eigenschwingungszahlen bzw. Eigenfrequenzen ergeben, wobei gegebenenfalls auch durch die Wahl verschiedener Dämpfungsverhältnisse, verschiedener Einschaltkräfte u. dgl. dafür gesorgt werden kann, daß der Prellvorgang der einzelnen Kontakte weitgehend verschieden abläuft. Wenn ein derartiges Kontaktsystem geschlossen wird, so wird infolge der Streuung der einzelnen Prellvorgänge erreicht, daß vom ersten Augenblick des Stromschlusses an immer mehrere, wenigstens einzelne (einer) der Einzelkontakte den Gegenkontakt berühren, so daß der eingeschaltete. Strom nicht mehr abgerissen wird. Die Bedingungen können hierbei so gestaltet werden, daß bei dem Abheben der einzelnen Kontaktteile mit Rücksicht auf den Stromfluß über die anderen Parallelkontakte keine Lichtbogenbildung mehr eintritt, so daß auch der Kontaktabbrand praktisch vermieden ist.According to the invention, the disadvantages mentioned can thereby be avoided be that the Kontakta: lorder in a multitude of mutually parallel working Individual contacts are resolved, which have different bouncing properties from one another to have. For this purpose, the individual contacts z. B. deviating from each other with @ Mass to be executed. so that there are different natural frequencies or natural frequencies result, possibly also through the choice of different damping ratios, various switch-on forces and the like. It can be ensured that the bouncing process the individual contacts are largely different. If such a contact system is closed, as a result of the scattering of the individual bouncing processes, that from the first moment of the connection to the power supply there were always several, at least some (one) of the individual contacts touch the mating contact so that the switched on. Electricity is no longer torn off. The conditions can be designed in such a way that that when lifting the individual contact parts with consideration for the current flow over the other parallel contacts no longer arcing, so that too contact erosion is practically avoided.
Besonders vorteilhaft erweist sich die vorgeschlagene Maßnahme bei Anordnungen, bei denen aus anderen Gründen eine Vielzahl zueinander parallel arbeitender Kontakte angewendet ist. Mit besonderem Vorteil können bei derartigen An ordnungen außerdem noch Maßnahmen angewendet werden, die den Umfang der Prellvorgänge an den einzelnen Kontakten möglichst gering halten. Hierzu können beispielsweise mehrere übereinanderliegende Teile als feststehender Kontakt verwendet werden, von denen möglichst der dem beweglichen Kontakt - unmittelbar zugewendete die Stromzuführung erhält. Außerdem können unter Umständen auch Maßnahmen angewendet werden, wie Verwendung eines Kontaktwerkstoffes mit geringer Stoßzahl bzw. kleinem Schubmodul, Verwendung einer Einschaltkraft, die erst bei oder kurz vor der Kontaktberührung auf hohe Werbe ansteigt, Konö takte mit kleinem Krümmungsrädius an der Berührungsstelle, Anordnung eines kleinen Schaltwegs und Maßnahmen zur Dämpfung der Kontaktbewegung.The proposed measure proves to be particularly advantageous Arrangements in which, for other reasons, a large number of one another working in parallel Contacts is applied. With particular advantage in such arrangements In addition, measures are applied that reduce the extent of the bouncing on the Keep individual contacts as low as possible. For this purpose, for example, several superimposed parts are used as a fixed contact, of which If possible, the one facing the moving contact - the power supply directly facing receives. In addition, measures can also be applied under certain circumstances, such as use of a contact material with a low number of impacts or a small shear modulus, use a switch-on force that only occurs when or shortly before contact is made on high advertising increases, contacts with a small radius of curvature at the point of contact, arrangement a small switching path and measures to dampen the contact movement.
Der Erfindungsgedanke bietet insbesondere bei Schalteinrichtungen eine wertvolle Verbesserung, bei denen es erwünscht ist, mit sehr hoher Einschaltgeschwindigkeit zu arbeiten, sowie bei solchen, bei denen es darauf ankommt, daß der Stromschluß zu einem genau festgelegten Zeitpunkt erfolgt.The idea of the invention is particularly useful in switching devices a valuable improvement where it is desirable to have very high on-speed to work, as well as those where it is important that the power supply takes place at a precisely defined point in time.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES6488D DE926798C (en) | 1944-11-03 | 1944-11-03 | Contact arrangement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES6488D DE926798C (en) | 1944-11-03 | 1944-11-03 | Contact arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
DE926798C true DE926798C (en) | 1955-04-25 |
Family
ID=7472025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES6488D Expired DE926798C (en) | 1944-11-03 | 1944-11-03 | Contact arrangement |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE926798C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0105816B1 (en) * | 1982-09-30 | 1987-06-24 | FERRAZ Société Anonyme | Device for automatically grounding structures accidentally being under tension |
EP1202303A2 (en) * | 2000-10-31 | 2002-05-02 | Siemens Aktiengesellschaft | Arrangement of switch contacts for a low voltage circuit breaker |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE625644C (en) * | 1936-02-13 | Siemens Schuckertwerke Akt Ges | By changing the distance between two relatively movable contact pieces, activated contact for AC contact relay | |
DE649664C (en) * | 1931-05-05 | 1937-08-30 | Siemens Schuckertwerke Akt Ges | Contact arrangement for electrical apparatus or switchgear |
US2185166A (en) * | 1938-08-13 | 1939-12-26 | Gen Electric | Electric circuit breaker |
US2324891A (en) * | 1941-05-01 | 1943-07-20 | Gen Electric | Electric circuit interrupter |
-
1944
- 1944-11-03 DE DES6488D patent/DE926798C/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE625644C (en) * | 1936-02-13 | Siemens Schuckertwerke Akt Ges | By changing the distance between two relatively movable contact pieces, activated contact for AC contact relay | |
DE649664C (en) * | 1931-05-05 | 1937-08-30 | Siemens Schuckertwerke Akt Ges | Contact arrangement for electrical apparatus or switchgear |
US2185166A (en) * | 1938-08-13 | 1939-12-26 | Gen Electric | Electric circuit breaker |
US2324891A (en) * | 1941-05-01 | 1943-07-20 | Gen Electric | Electric circuit interrupter |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0105816B1 (en) * | 1982-09-30 | 1987-06-24 | FERRAZ Société Anonyme | Device for automatically grounding structures accidentally being under tension |
EP1202303A2 (en) * | 2000-10-31 | 2002-05-02 | Siemens Aktiengesellschaft | Arrangement of switch contacts for a low voltage circuit breaker |
EP1202303A3 (en) * | 2000-10-31 | 2002-09-25 | Siemens Aktiengesellschaft | Arrangement of switch contacts for a low voltage circuit breaker |
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