Electromechanical protective switch

A technology for electromechanical protection and protection switches, applied in electric switches, emergency protection devices, circuits, etc., can solve the problems of separation current damage, increase the maintenance cost of protection switches, limit the number of switching cycles of protection switches, etc., and achieve reduced burning loss, small Minimized transition resistance, the effect of safe separation

Active Publication Date: 2017-05-17
LISA DRAXLMAIER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such high load currents flow through the protective switch when the contacts are separated, the number of switching cycles of the protective switches currently used is limited due to their construction
The switching contacts of this protective switch, whose contacts usually consist of copper or silver, can only be ...

Method used

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  • Electromechanical protective switch
  • Electromechanical protective switch
  • Electromechanical protective switch

Examples

Experimental program
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Embodiment Construction

[0023] figure 1 A protective switch 100 is shown with two main contact pairs 1, 1', wherein the two main contacts 1 are arranged on the main contact bridge 2. The main contact pair 1, 1' is made of silver or a silver-containing material or is coated with silver or said silver-containing material. The protective switch 100 also comprises two secondary contact pairs 4, 4' having a material with a higher melting point than the main contact pair 1, 1'. The pair of secondary contacts 4, 4' is preferably made of or clad with tungsten. The two secondary contacts 4 are arranged on a secondary contact bridge 5 parallel to the main contact bridge 2 . The protective switch 100 also includes a first armature 10 for the movement of the main contact bridge 2 and a second armature 15 for the movement of the secondary contact bridge 5 . The armatures 10, 15 are formed such that the secondary contact pair 4, 4' opens after the main contact pair 1, 1' and closes before the main contact pair ...

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PUM

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Abstract

The invention relates to an electromechanical protective switch (100) having: at least one main contact pair (1, 1'), one of them is arranged on a main contact bridge (2); at least one sub contact pair (4, 4') provided with a material, of which the melt point is higher than the main contact (1), one of the two sub contact pair is arranged on a sub contact bridge (5) being parallel to the main sub contact pair; a first armature (10) for movement of the main contact bridge (2); a second armature (15) for movement of the sub contact bridge (5), wherein the two armatures (10, 15) enables the sub contact pair (4, 4') is disconnected after the main contact pair (1, 1') and is connected before the main contact pair (1, 1').

Description

technical field [0001] The invention relates to electromechanical protective switches for separating high currents. Background technique [0002] Protective switches, also known as relays or protectors, are known in the prior art. The basic function of such protective switches is to switch high electrical powers in load circuits by means of relatively small currents, ie control currents. The current in the load circuit is here many times greater than the control current. [0003] A problem that arises in protective switches when switching on high power is that arcing can occur when the switching contacts are closed, which leads to wear of the switching contacts. In the protective switches known from the prior art, the switching contacts are made of copper or silver, for example. In particular, at high voltages and currents an unavoidable current flow occurs between the switching contacts to be separated. Usually, this arc is quenched by additionally using, for example, q...

Claims

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Application Information

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IPC IPC(8): H01H50/62H01H1/20
CPCH01H1/20H01H50/62H01H1/2025H01H50/541H01H50/546H01H50/56H01H51/20H01H2235/01
Inventor 马可·费勒默彼得·法拉特迈尔克里斯蒂安·格鲁伯克里斯托弗·马赫纳
Owner LISA DRAXLMAIER GMBH
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