GE L90 Instruction Manual page 356

5.6 GROUPED ELEMENTS
where: P and Q are active and reactive powers as measured per the UR-series metering convention,
is a sum of the element characteristic (
SMIN is the minimum operating power
The operating quantity is displayed in the
value. The element has two independent (as to the pickup and delay settings) stages for alarm and trip, respectively.
5
5-210
DIR POWER 1 RCA
ACTUAL VALUES
Q
SMIN
RESTRAIN
Figure 5–111: DIRECTIONAL POWER CHARACTERISTIC
L90 Line Current Differential System
) and calibration (
DIR POWER 1 CALIBRATION
METERING SENSITIVE DIRECTIONAL POWER 1(2)
OPERATE
RCA+
CALIBRATION
P
+
-
5 SETTINGS
) angles, and
actual
GE Multilin