Patent ID: 6026423
Filing Date: 2000-02-15
Classification: G06F

Abstract:
A method of determining a square root of a particular value of a square of a parameter which relates to at least one of an input current signal and an input voltage signal obtained by a circuit breaker system, the method comprising the steps of:measuring at least one of the input current signal and the input voltage signal obtained by the circuit breaker system;deriving said square of said parameter relating to at least one of said input current signal and said input voltage signal;determining a whole root of said square root of a particular value of said square of said parameter;determining a slope of said square of said parameter bounded by at least a first point and a second point, where said first point corresponds to a first value of said square of said parameter and said second point corresponds to a second value of said square of said parameter;determining a difference between said particular value of said square of said parameter and a value of a square of said whole root;determining a fractional part of said square root of said particular value of said square of said parameter using said slope and said difference; andcombining said whole root of said square root and said fractional part of said square root.