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Disconnector and method of detecting Rogowski transformers in a disconnector

A technology of circuit breakers and transformers, which is applied in the field of circuit breakers and can solve problems such as insufficient measurement range of data processing devices

Active Publication Date: 2016-02-24
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the data processing unit only has a limited input range for the measured values, this leads to the limitation of using electronic tripping units of the same type of disconnect switch for different switch rated currents: the measuring range of the data processing unit is not large enough

Method used

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  • Disconnector and method of detecting Rogowski transformers in a disconnector
  • Disconnector and method of detecting Rogowski transformers in a disconnector

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Experimental program
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Embodiment Construction

[0019] The disconnect switch, designated as a whole by 10 , has a microcontroller 12 which is provided for controlling a mechanical triggering unit 14 which acts on its side on a switch contact 16 . The electrically conductive connection between the two terminals 18 a and 18 b of the disconnector 10 can be interrupted by means of the switching contact 16 .

[0020] Usually the amperage of the current flowing through the conductor is measured, here it is measured with the help of a Rogowski transformer 20, the Rogowski transformer 20 is in figure 1 Wires are not shown. Rogowski transformers, also known as Rogowski coils, consist of air core coils, ie coils wound on a plastic core (or even coreless). The change of the current intensity will cause a voltage to be induced in the Rogowski transformer 20 , and the degree of the induced voltage is collected by the microcontroller 12 . If the evaluation given by the microcontroller 12 shows that the current strength is too high, the...

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Abstract

In the disconnect switch (10), in order to detect the disconnection of the Rogowski transformer (20), a voltage is applied across the Rogowski transformer, which is converted from a digital signal by a digital-to-analog converter (42) Transform output. The digital signal depends on the switch current rating of the disconnect switch (10).

Description

technical field [0001] The invention relates to a circuit breaker according to the invention. The invention also relates to a method according to the invention for testing a Rogowski transformer in a circuit breaker. Background technique [0002] This kind of circuit breaker with the "NSX" logo of Schneider Company can be purchased on the market at present. [0003] The disconnect switch, which can break the electrically conductive connection, has at least one switch contact. If the amperage of the current flowing through the current conductor exceeds a certain value, the conductive connection should be interrupted. For this purpose the current strength must be measured. Among them, the Rogowski transformer is used to measure the current intensity; this is a coil without an iron core, that is, an air coil or generally a coil wound on a plastic part. Arranged after the Rogowski transformer for amplifying the output signal of the Rogowski transformer, i.e. for amplifying t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08G01R31/02G01R31/72
CPCG01R15/181G01R31/3277G01R35/00H01H83/04G01R31/72H02H3/02
Inventor A·费希尔
Owner SIEMENS AG