Patent ID: 7557468

Claim:
A panel to distribute power from a power supply to at least one load, the panel comprising: at least one breaker, and means for detecting a current waveform in a power line through which power is distributed by the panel to the load, wherein the means for detecting the current waveform is configured to close the breaker upon detecting a non-symmetrical current waveform, wherein the means for detecting the current waveform is configured to open the breaker upon detecting a symmetrical current waveform within one cycle of the detected symmetrical current waveform, wherein the breaker comprises an input connected to receive electrical current comprising a first pulse and a second pulse and an output connected to provide the received electrical current to the load when the breaker is closed, and wherein the means for detecting the current waveform comprises a coil connected between the input and the output of the breaker and configured to generate a magnetic field in response to the received current such that: the magnetic field generated by the coil opens the breaker within one cycle if a magnitude of the second pulse is greater than a threshold of the breaker and is at least one half of a magnitude of the first pulse, and the magnetic field generated by the breaker is insufficient to open the breaker if the magnitude of the second pulse is greater than the threshold and is at most one third of the magnitude of the first pulse.