Arc fault detection device
AssigneeEaton Intelligent Power Limited
InventorsWerner Dichler, Krzysztof Kowalów
Life of this patent
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Abstract
An arc fault detection device includes: a first electric line; at least one sensor for monitoring an electric current or voltage spectrum in the first electric line and outputting an analogue HF measurement signal; and an input section connected to the at least one sensor, the input section including: an input bandpass filter connected to the at least one sensor so as to filter the analogue HF measurement signal, a passband of the input bandpass filter having a predeterminable arc-frequency range so as to detect arcing effects; and a sampling mixer connected to the input bandpass filter, the sampling mixer having a sampling frequency lower than twice an upper threshold frequency of the arc-frequency range.
Claims16
An arc fault detection device, comprising:
- a first electric line;
- at least one sensor configured to monitor an electric current or voltage spectrum in the first electric line and to output an analogue HF measurement signal;
- and
- an input section connected to the at least one sensor, the input section comprising:
- an input bandpass filter connected to the at least one sensor so as to filter the analogue HF measurement signal, a passband of the input bandpass filter comprising a predeterminable arc-frequency range so as to detect arcing effects;
- and
- a sampling mixer connected to the input bandpass filter, the sampling mixer being configured to sample an output signal of the input bandpass filter with a sampling frequency lower than twice an upper threshold frequency of the arc-frequency range,
- wherein the sampling mixer consists essentially of a resistor, a capacitor, a semiconductor switch, and a signal generator.
Dependencies are inferred from the claim text.