Instruction manual
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AQ G3x7 Generator protection IED
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Figure 3-37: Directional decision characteristics of operating angle mode.
In the figure above is presented the directional decision characteristics. Measured U0 signal
is the reference for measured -I0 signal. RCA setting is the characteristic angle and R0A
parameter is the operating angle. In the figure FI parameter describes the measured residual
current angle in relation to measured U0 signal and IN is the magnitude of the measured
residual current. In the figure described situation the measured residual current is inside of
the set operating sector and the status of the function would be starti
ng in “Forward” mode.
The protection function supports operating angle mode and also wattmetric and varmetric
operating characteristics.
