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Method for evaluating switch contact6 point electric arc burning out

A technology of switching contacts and switching currents, which is applied in the directions of contacts, electric switches, contact testing/inspection, etc., and can solve problems such as mechanical display roughness

Inactive Publication Date: 2006-08-16
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this mechanical display is rough and in addition must be controlled by the operator on site all the time

Method used

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  • Method for evaluating switch contact6 point electric arc burning out
  • Method for evaluating switch contact6 point electric arc burning out

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Embodiment Construction

[0025] FIG. 1 shows an embodiment of a device 1 according to the invention for carrying out an embodiment of the method according to the invention. The device 1 is provided for protecting components not shown in the figure, which are connected to the primary side in the power distribution network. In practice, the energy distribution is extended to a high-voltage three-phase network with three phases, of which only one phase is shown via the primary conductor 2 in FIG. 1 for the sake of clarity. A power switch 3 for disconnecting the primary conductor 2 is arranged in the primary conductor 2 . The power switch 3 here has two switching contacts, which can be separated from one another by introducing a drive movement. The transmission movement is produced by a transmission unit not shown. Due to the high currents that occur in the primary conductor 2 , especially in the event of a short circuit, when the switching contacts are separated, arcs can occur which cause the material...

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Abstract

Method for estimating contact erosion caused by electrical arcing in which the total current is sampled during a switching process and integrated to give a value that is representative of the erosion of the switching contacts. The integrated current value can be compared with a value stored in memory. An Independent claim is made for an arrangement for estimating the amount of contact erosion that has occurred in an electrical power switch.

Description

technical field [0001] The invention relates to a method of estimating arc burnout of switch contacts. Background technique [0002] The switching contacts are arranged to break a current having a fundamental oscillation time T, wherein a digital scan value is formed within a scan clock by scanning a measurand having a known correlation with the current, which is combined with at least A weighted parameter stored in the protection function block is compared and checked whether there is a release condition, so that when the release condition is met, at the release time t 释放 A release signal is generated to separate the switch contacts, wherein a switching current value of the same sign is formed according to the scan value, according to the release instant t 释放 Determine the starting time t 起始 , and for time at the initial time t 起始 Subsequent switching currents of the same sign are always summed to form a switching current integral value until an end moment determined by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/00H01H71/12
CPCH01H1/0015
Inventor 埃杜阿德・施内尔森
Owner SIEMENS AG
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