Noise propagation immunity of a multi-string arc fault detection device

A system for detecting arcing in a DC power system, comprising:

• at least two current sensors operative to monitor at least two current outputs, respectively, the at least two current sensors being configured and arranged to provide a combined current output,
• wherein the at least two current sensors have reverse polarities, and
• wherein the at least two current outputs are provided for monitoring by the respective current sensors over at least two adjacent conductors, respectively, in the DC power system;
• a comparator operative to generate one or more pulses in response to at least one change in the combined current output over time (di/dt);
• and
• a processor operative to process the respective pulses to determine a presence of arcing in the DC power system, and to generate an output indicative of the presence of arcing in the DC power system.

A system for detecting arcing in a DC power system, comprising:

• at least two current sensors operative to monitor at least two current outputs, respectively, the at least two current sensors being configured and arranged to provide a combined current output,
• wherein the at least two current outputs are provided for monitoring by the respective current sensors over at least two adjacent conductors, respectively, in the DC power system, the at least two adjacent conductors being configured and arranged to provide the at least two current outputs in opposing directions;
• a comparator operative to generate one or more pulses in response to at least one change in the combined current output over time (di/dt);
• and
• a processor operative to process the respective pulses to determine a presence of arcing in the DC power system, and to generate an output indicative of the presence of arcing in the DC power system.