The X/R ratio is the ratio of the inductive reactance (X) to the resistance (R) in a power system circuit. This ratio significantly affects the performance of overcurrent relays during a fault. A high X/R ratio means the circuit is predominantly inductive, while a low X/R ratio means the circuit is more resistive. During a fault, the fault current waveform is not purely sinusoidal; it contains a DC offset component. The magni....
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