Abstract: An AC arc fault device and methodology includes acquiring a signal in response to an AC current and defining overcurrent regions that correspond to the alternating directions of the AC current and a normal region. A software module identifies a parallel AC arc event over a selected time period in response to multiple occurrences of the acquired signal moving into one of the overcurrent regions. The software module also determines average current values over multiple selected time periods and identifies a series AC arc event in response to the difference between the average values exceeding a pre-determined threshold.

Abstract: A DC arc fault device and methodology includes acquiring a signal in response to a DC current. A software module identifies a parallel DC arc event when a difference between a maximum signal value and a minimum signal value exceeds a threshold. The software module also determines average signal values over multiple selected time periods and identifies a series DC arc event in response to the difference between the average values exceeding a predetermined threshold.

Abstract: The present invention is a generator control system where each generator in the system has an associated controller. Each controller communicates generator data or information with the other controllers in the generator control system. Each of the controllers includes a digital signal processor for analyzing the generator signal from the associated generator and information from the other controllers in the generator control system. The controllers each compare their generator signal with a system average and adjust the associated generator until the generators all supply equal amounts of power to the system.

Abstract: A generator feeder fault detection system includes a ground fault detector transformer that monitors the sum of forward and return currents from and to a generator. During normal operation, the sum of the currents in the ground fault detector equals zero. If there is a fault, however, the ground fault detector will detect a non-zero current sum. Because the ground fault detector measures the sum of the currents traveling through it, the current sensor in the detection circuit can be selected to measure small amounts of current and does not need to have a high threshold, even for generators that output high levels of current.