DD219897A1 - PRESSURE CONTACT ASSEMBLY WITH HIGH ELECTRIC LIFE, ESPECIALLY FOR RELAY - Google Patents

Abstract

The invention relates to a pressure contact arrangement, in particular for relays of control and regulation technology, as they come for example for switching lighting systems, electric motors, protectors, etc. used. The aim of the invention is a pressure contact arrangement with a long service life, increased utility value and thus improved quality. The object of the invention is a pressure contact arrangement which operates electrically wear-free with an effective use of Schaltstueckmaterial and allows high switching performance. According to the invention, the object is achieved in that a first actuated main contact and a defined temporally later actuated parallel contact, the same and connected in parallel, are arranged in a load circuit. Furthermore, the fact that the two contact systems - main contact, the Schaltstuecke of anlaufbestaendigem material with high electrical conductivity and parallel contact, the Schaltstuecke consist of erosion resistant material - are each arranged in parallel as an "opener" or "closer". Furthermore, characterized in that a high-temperature and arc-resistant material existing switching chamber is arranged in the region of the parallel contact. figure

Description

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Pressure contact arrangement with high electrical life, especially for relays

Field of application of the invention.

The invention relates to a pressure contact arrangement with a higher electrical life, in particular for relays of control and regulation technology, as used for example for switching lighting systems, electric motors, shooters, etc. are used.

Characteristic of the known technical solutions

There are pressure contact arrangements in SchaItgeräten, in which in addition to quenching circuits for switches in highly inductive load circuits more art circuits, for example, series and parallel circuits of Eontakten come in different combinations, for increasing the life and / or Grenzschaltvermögens of switching devices used.

Furthermore, it is known that to ensure the electrical life of switching devices with pressure contacts an optimization between contact piece volume, contact material and switching behavior of the switching device, given a given electrical load occurs. The achievable switching cycles are limited by the contact piece wear as a result of the occurrence of switching arcs »

An increase in the electrical life of switching devices

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while reducing the contact or Edeimetallvolumens can u.a. by reducing the burning. , duration of the resulting switching arc can be achieved «

The reduction of the burning time of the switching arc takes place through appropriate constructive solutions in the switching device or various quenching circuits on the switching device. ;. , - '.

For miniature circuit breaker constructive measures to delete the Schaltlichtbogen- and to reduce the switching and bounce times are limited. Extinguishing circuits and ^! the realized with semiconductor elements in so-called hybrid switches arc-free off, are associated with a considerable overhead.

In the known pressure contact arrangements in switching devices. or relays, - are limits to increasing the on and off capacity. This applies in addition to inductive loads also for switching capacitive and lamp loads with rated currents in the range of the permissible continuous current of the switching device or relay. ·

Object of the invention

The aim of the invention is a pressure contact arrangement with increased service life, increased utility value and thus improved quality.

Presentation of the essence of the invention

The invention is based on the object. Drückkontaktanordnung with high electrical life, especially for relays to create, which works electrically wear-free with an effective use of contact material and high switching performance allows. ... ,

According to the invention the object is achieved in that a first actuated main contact and a defined time

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later operated parallel contact, the same and connected in parallel, are arranged in a load circuit.

Furthermore, the fact that the two contact systems - Haup'tkontakt, the switching pieces of tarnish-resistant material with high electrical conductivity and parallel contact, the switching pieces of erosion-resistant material are each arranged in parallel as "opener" or "closer" are ''. '. ''

Furthermore in that a "high-temperature and arc-resistant material existing" switching chamber is disposed in the region of the parallel contact, or, this receives .-.

In the pressure contact arrangement according to the invention, a division of the two functions of an Eontaktes takes place on two parallel Eontakte ·

The one Eontakt takes over the switching function and the other Eontakt the leadership of the load current. '

This makes it possible to use according to the loads occurring different switching material with minimal material expense, which means a precious metal savings at the same time.

Furthermore, the pressure contact arrangement according to the invention operates electrically wear-free and no additional safety measures are necessary for increasing the electrical life of the Eontakt arrangement or the switching device. -.

Increasing the on and off capacity of the switching device is achieved not only for inductive loads, but also for switching on capacitive loads and lamp loads with rated currents in the range of the permissible continuous current.

Also, the possible reduction of the switching chamber contributes to the miniaturization of the switching devices and at the same time increase the switching capacity.

- Ausführungsbeispiel · - '' embodiment.

The invention will be explained in more detail below using an exemplary embodiment.

The accompanying drawing shows the pressure contact arrangement according to the invention with the actuating slide.

The> pressure contact arrangement according to the invention consists essentially of a. Main contact 1 and a parallel contact 2. The main contact 1 and the parallel contact 2 or the two Eontaktsysteme consist of a respective normally-closed contact spring 3 and 3 * and one contact contact spring 4 and 4 ¹ with the associated contact pieces ·

The two contact systems are opposite symmetrical to the actuating slide f? arranged.

The actuating slide 5.wird moved by the magnetic system, not shown in the drawing in the direction of its longitudinal axis.und by the return spring 6, returned to its original position.

The actuation of the normally-open contact springs 4- and 4 'takes place by means of two actuation cams 7 and 7' offset on the actuation slide 5 and in the direction of actuation. The two actuation cams 7 and 7 * are arranged offset on both longitudinal sides of the actuation slide 5 in such a way that the Parallel contact 2, the switching pieces are made of erosion resistant material, defined in time opens later than the main contact 1, the switching pieces are made of tarnish-resistant material with high electrical conductivity.

The two contact systems-main contact T and parallel contact 2- operate in parallel and are assigned to a load circuit.

This ensures that .Zum at the time of opening the main contact 1 of the parallel contact 2 is still closed and can form no arc between the switching pieces with high electrical conductivity.

Only beim.Öffnen of the parallel contact 2 .überschreitet the instantaneous switching voltage for the formation of a ^l. Arc arc necessary arc voltage and it comes at the point of the smallest distance of the switching pieces, d. between the erosion-resistant contact pieces of Parallelkon- contact 2, to form an arc.

Furthermore, the switching chamber 8 in the region of the parallel contact 2 of high-temperature and arc-resistant material, for example ceramic, be struck · This is a minimization of the Schaitgerätes -bei increase the switching capacity possible.

Claims (3)

E rf i η d η g s a η s ρ r u c h 1. Pressure contact arrangement with high electrical life, especially for Heiais, characterized in that a first actuated main contact (1) and a defined time later actuated parallel contact (2), the same and connected in parallel, are arranged in a load circuit. 2 * pressure contact arrangement according to item 1, characterized in that die.beiden two contact systems -Eauptkontakt (1), the switching pieces from anlaufbeständigem material be 'and parallel contact (2) whose switching pieces consist of erosion-resistant material each parallel as an "opener" or "Normally open" are arranged · 3- pressure contact arrangement according to item 1 and 2, characterized in that a high-temperature * and arc-resistant material existing switching chamber (8) in the region of the parallel contact (2) is arranged. For this 1 sheet drawing