GE C60 Instruction Manual page 454

GROUPED ELEMENTS CHAPTER 5: SETTINGS
P and Q are active and reactive powers as measured per the UR metering convention
θ is a sum of the element characteristic ( ) and calibration ( ) angles
DIR POWER 1 RCA DIR POWER 1 CALIBRATION
SMIN is the minimum operating power
The operating quantity is displayed in the actual value.
ACTUAL VALUES  METERING  SENSITIVE DIRECTIONAL POWER 1(2)
The element has two independent (as to the pickup and delay settings) stages for alarm and trip, respectively.
Figure 5-131: Directional power characteristic
By making the characteristic angle adjustable and providing for both negative and positive values of the minimum
operating power, a variety of operating characteristics can be achieved as presented in the following figure. For example,
5
section (a) in the figure shows settings for reverse power, while section (b) shows settings for low forward power
applications.
5-246 C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL