Patent ID: 7282924

Claim:
A computerized electricity system for connecting loads to at least one power source, the computerized electricity system comprising: (a) an arc fault detecting sub-system for detecting arc faults, said sub-system having at least one module, each said module including: (i) a relay unit, electrically associated with a particular load of the loads, said relay unit for connecting and disconnecting to a power source of the at least one power source; (ii) a current sensor for measuring a current being delivered from said power source to the load, so as to produce a current measurement; (iii) an analog circuit designed and configured to receive said current measurement from said current sensor, and to produce an analog signal based on said current measurement, and a second signal for indicating a potential arc fault event, and (iv) a digital circuit designed and configured to receive said second signal from said analog circuit, and to produce data, and (b) a processing unit electrically connected to each said module of said arc fault detecting sub-system, so as to receive data corresponding to said analog signal, and said data from said digital circuit, said processing unit for identifying of said arc faults, and wherein said processing unit is configured to command said relay unit to disconnect said current in response to said identifying of said arc faults, and wherein said processing unit is configured to provide said command only if several pre-determined conditions are met, said conditions including: (I) after a detection of said potential arc fault event by said arc fault detecting sub-system, said current measurement remains substantially unchanged, and (II) after a detection of at least one additional potential arc fault event by said arc fault detecting sub-system, said arc fault events are found to occur in an acyclic fashion.