This new approach to high impedance fault detection includes a multi-scheme high
impedance fault detection scheme employing individual fault detection systems each
having their own algorithm that use various features of phase and/or ground currents to
individually detect a high impedance fault. Suitable features of the currents include their
waveform signatures, their sample values, etc. Figure 1 shows a schematic diagram of
an electrical power distribution system having an electrical power distribution line and a
composite high impedance fault detection system.