Method for identifying arcing faults and circuit breaker
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United States of America Patent
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Jul 11, 2017
Grant Date -
Aug 25, 2016
app pub date -
Aug 23, 2013
filing date -
Feb 23, 2011
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Abstract
A method for identifying arcing faults within a circuit having a system frequency, an electrical current and an electrical voltage, in which method an interference signal occurring, which has a frequency below an LF1 frequency and a current intensity above an LF1 limit threshold, defines an LF1 signal, in which a number of interference signals occurring, which have a frequency below an HF2 frequency, are combined to form an HF2 signal if the number of interference signals occurring is greater than or equal to an HF2 number and the time interval between two successive interference signals is less than an HF2 time, in which the number of time periods with a respective length which amounts to an accumulation length and which follow one another directly in time and in which in each case at least one HF2 signal is present define an accumulation when the number of time periods is greater than or equal to an accumulation number.
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