Patent ID: 6653748
Filing Date: 2003-11-25
Classification: H02J

Abstract:
A control system for selectively isolating a power supply from a common bus upon detection of an improper current flow between said common bus and said power supply, said control system comprising:a resistive element providing variable resistance between an input terminal and an output terminal, said variable resistance having one of at least three resistive values, said input terminal connected to an output path of an output signal of said power supply, said output terminal connected to said common bus, said resistive element further comprising a control terminal enabling adjustment of said variable resistance; and a control element providing a control signal to said control terminal, said control element being responsive to a value of a current flowing between said output path and said common bus, wherein said control element generates said control signal to cause said variable resistance to be set at one resistive value of said at least three resistive values to impede flow of said current, depending on said value of said current.