GE T60 Instruction Manual page 377

5 SETTINGS
e) PHASE DIRECTIONAL OVERCURRENT (ANSI 67P, IEC PVCB/PTOC)

PATH: SETTINGS GROUPED ELEMENTS
 PHASE
 DIRECTIONAL 1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The TARGET setting is not user-selectable and forced to "Disabled". If Targets are required from directional
elements, it can be achieved by assigning directional element output to a digital element, where targets
selection can be used as required.
NOTE NOTE
The phase directional elements (one for each of phases A, B, and C) determine the phase current flow direction for steady
state and fault conditions and can be used to control the operation of the phase overcurrent elements via the
of these elements.
Phasors for Phase A Polarization:
VPol = VBC
IA = operating current
ECA = Element Characteristic Angle at 30°
GE Multilin

SETTING GROUP 1(6)
PHASE DIR 1
FUNCTION: Disabled
PHASE DIR 1 SIGNAL
SOURCE: SRC 1
PHASE DIR 1 BLOCK:
Off
PHASE DIR 1
ECA: 30
PHASE DIR POL V1
THRESHOLD: 0.700 pu
PHASE DIR 1 BLOCK
WHEN V MEM EXP: No
PHASE DIR 1
TARGET: Self-reset
PHASE DIR 1
EVENTS: Disabled
VAG (Unfaulted)
VBC
VCG
×
(1/_ECA) = polarizing voltage
Figure 5–108: PHASE A DIRECTIONAL POLARIZATION
T60 Transformer Protection System
 
PHASE CURRENT PHASE DIRECTIONAL 1
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: FlexLogic operand
Range: 0 to 359° in steps of 1
Range: 0.000 to 3.000 pu in steps of 0.001
Range: No, Yes
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
–90°
Fault angle
set at 60° Lag
VPol
VAG(Faulted)
IA
ECA
set at 30°
VBC
VBG
827800A2.CDR
5.6 GROUPED ELEMENTS
inputs
BLOCK
+90°
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