Sensitive Directional Power (Ansi 32) - GE C60 Instruction Manual

CHAPTER 5: SETTINGS

5.7.8 Sensitive directional power (ANSI 32)

SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  POWER  SENSITIVE DIRECTIONAL POWER 
DIRECTIONAL POWER 1(2)
 DIRECTIONAL
 POWER 1
The sensitive directional power element responds to three-phase directional 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 a full set of wye-connected VTs or a full set of delta-connected VTs. In the
latter case, the two-wattmeter method is used. See 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
Characteristic diagram that follows. The element responds to the following condition:
where
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-130: Auxiliary overvoltage logic
DIR POWER 1

FUNCTION: Disabled
DIR POWER 1

SOURCE: SRC 1
DIR POWER 1

RCA: 0°
DIR POWER 1

CALIBRATION: 0.00°
DIR POWER 1 STG1

SMIN: 0.100 pu
DIR POWER 1 STG1

DELAY: 0.50 s
DIR POWER 1 STG2

SMIN: 0.100 pu
DIR POWER 1 STG2

DELAY: 20.00 s
DIR POWER 1 BLK:

Off
DIR POWER 1

TARGET: Self-reset
DIR POWER 1

EVENTS: Disabled
P cos θ + Q sin θ > SMIN
GROUPED ELEMENTS
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
5
Eq. 5-19
5-245