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Direct current switch with means for extinguishing arcs independent of current direction

A technology of arc extinguishing device and current direction, which is applied in the direction of high voltage/high current switch, electric switch, circuit, etc.

Active Publication Date: 2017-10-24
EATON ELECTRICAL IP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other common protective devices such as circuit breakers are likewise unable to interrupt the current because they are usually below the rated current, ie there is an operating current for the protective device which prevents said current from being interrupted.

Method used

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  • Direct current switch with means for extinguishing arcs independent of current direction
  • Direct current switch with means for extinguishing arcs independent of current direction
  • Direct current switch with means for extinguishing arcs independent of current direction

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Embodiment Construction

[0025] In the description below, identical, functionally identical and functionally consecutive elements can be denoted by the same reference signs. The absolute values ​​are described below as examples only, and are not considered as limitations on the present invention.

[0026] figure 1 The illustrated load-break switch 10 , which is arranged on a switch for a four-phase alternating current, has four substantially identically constructed switching units 12 , 14 , 16 and 18 for each phase N, L1 , L2 and L3 . The switching units 12, 14, 16 and 18 used are rotary double-contact circuit breakers each having two current paths and two circuit breaker sections, which are connected in series with one another in order to achieve the required high total arc voltage and thus Resists the drive's network voltage applied from the outside and extinguishes the current as quickly as possible.

[0027] Due to the series connection of the double contact circuit breakers, the direction of cu...

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PUM

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Abstract

The invention relates to a direct current switch having means for extinguishing arcs independently of the direction of current flow, having at least two switching units (12, 14, 16, 18) connected to each other, wherein each switching unit has at least A current path (20, 22) with a circuit breaker section (24, 26), and each current path has at least two switching contact elements (28, 30) for forming a circuit breaker section (24); at least one arc extinguishing means (32, 34), which are subordinate to one or more current paths of the switching unit; and one or more means (36) for generating magnetic fields, each of which is subordinate to a different switching unit The circuit breaker section is also oriented in such a way that its field lines are substantially perpendicular to the respective circuit breaker section and the distracting forces of at least two generated magnetic fields act oppositely on the On the arcs running along the respective circuit breaker path, at least one arc is thus diverted in the direction of the arc quenching device and another arc is diverted away from the arc quenching device.

Description

technical field [0001] The invention relates to a direct current switch having means for extinguishing an arc independently of the direction of the current flow. Background technique [0002] The basic principle of arc suppression in load-break switches and power switches for alternating current is that the arc runs with its own magnetic field in an interrupter specially provided for this purpose, where it is divided by the layout of the arc chute into Multiple small arcs and cooling. This cooling increases the voltage, which eventually causes the current to be disconnected. The natural zero crossing of the current when AC power is applied is also beneficial here. [0003] On the contrary, it is obviously more problematic to extinguish arcs when switching on direct current, since only arcs are present at DC voltages up to, for example, 1500 V and currents which are small relative to the rated current, for example approx. The own small magnetic field prevails, which is usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/20H01H9/44
CPCH01H1/20H01H9/443H01H1/2058H01H33/182
Inventor A·布里茨
Owner EATON ELECTRICAL IP