GE MiCOM P40 Agile Technical Manual page 181

P14x Chapter 6 - Current Protection Functions
The diagram shows the single-phase Load Blinder logic for phase A. The same principle applies to phases B and C.
The single phase Load Blinder logic is very similar to the three-phase Load Blinder logic. The main differences are:
The single-phase function does not use positive sequence impedance, it uses normal impedance measurment. It
also does not use negative sequence overcurrent to block the function.
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