Sensitive Directional Power - GE G60 Instruction Manual

5.5 GROUPED ELEMENTS
PATH: SETTINGS GROUPED ELEMENTS
DIRECTIONAL
POWER 1
5
The sensitive directional power element responds to three-phase active power and is designed for reverse power and low
forward power applications for synchronous machines or interconnections involving co-generation. The relay measures the
three-phase power from either full set of wye-connected VTs or full-set of delta-connected VTs. In the latter case, the two-
wattmeter method is used. Refer to the UR-series metering conventions section in Chapter 6 for details regarding the active
and reactive powers used by the sensitive directional power element.
The element has an adjustable characteristic angle and minimum operating power as shown in the Directional power char-
acteristic diagram. The element responds to the following condition:
where: P and Q are active and reactive powers as measured per the UR-series metering convention,
θ 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.
5-148
SETTING GROUP 1(6)
DIR POWER 1
FUNCTION: Disabled
DIR POWER 1
MESSAGE
SOURCE: SRC 1
DIR POWER 1
MESSAGE
RCA: 0°
DIR POWER 1
MESSAGE
CALIBRATION: 0.00°
DIR POWER 1 STG1
MESSAGE
SMIN: 0.100 pu
DIR POWER 1 STG1
MESSAGE
DELAY: 0.50 s
DIR POWER 1 STG2
MESSAGE
SMIN: 0.100 pu
DIR POWER 1 STG2
MESSAGE
DELAY: 20.00 s
DIR POWER 1 BLK:
MESSAGE
Off
DIR POWER 1
MESSAGE
TARGET: Self-Reset
DIR POWER 1
MESSAGE
EVENTS: Disabled
P cos θ
+
DIR POWER 1 RCA
ACTUAL VALUES
G60 Generator Management Relay

5.5.15 SENSITIVE DIRECTIONAL POWER

SENSITIVE DIRECTIONAL...
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0 to 359° in steps of 1
Range: 0 to 0.95° in steps of 0.05
Range: –1.200 to 1.200 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: –1.200 to 1.200 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic™ operand
Range: Self-Reset, Latched, Disabled
Range: Disabled, Enabled
Q sin θ > SMIN
) and calibration (
METERING SENSITIVE DIRECTIONAL POWER 1(2)
5 SETTINGS
DIRECTIONAL POWER 1(2)
) angles, and
DIR POWER 1 CALIBRATION
GE Multilin
(EQ 5.34)
actual