Static Differential Relays: Measuring Difference in Electrical Quantities
The differential relay measures the phasor difference between two similar electrical quantities (voltage-voltage or current-current). The rectifier bridge amplitude comparator is the most common static form for applications as a differential relay element. The block diagram for such a relay is shown in Fig. 4.16. Inputs I and II are supplied to the comparator. The output of the comparator (phasor [...]