GE D30 Instruction Manual page 279

5 SETTINGS
The distance zones can be forced to become self-polarized through the
dition (FlexLogic operand) can be configured to force self-polarization. When the selected operand is asserted (logic 1), the
distance functions become self-polarized regardless of other memory voltage logic conditions. When the selected operand
is de-asserted (logic 0), the distance functions follow other conditions of the memory voltage logic as shown below.
The distance zones can be forced to become memory-polarized through the
condition (any FlexLogic operand) can be configured to force memory polarization. When the selected operand is asserted
(logic 1), the distance functions become memory-polarized regardless of the positive-sequence voltage magnitude at this
time. When the selected operand is de-asserted (logic 0), the distance functions follow other conditions of the memory volt-
age logic.
The and
FORCE SELF-POLAR FORCE MEM-POLAR
will give higher priority to forcing self-polarization as indicated in the logic below. This is consistent with the overall philoso-
phy of distance memory polarization.
The memory polarization cannot be applied permanently but for a limited time only; the self-polarization may be
applied permanently and therefore should take higher priority.
NOTE
In firmware 7.20, when the fast distance algorithm is applied, the HardFiber brick is not supported. The fast dis-
tance algorithm is supported by the D30. It is not supported by the HardFiber, which maintains the original distance
element timing.
NOTE
b) PHASE DISTANCE (ANSI 21P)

PATH: SETTINGS GROUPED ELEMENTS
 PHASE DISTANCE Z1

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
GE Multilin
settings should never be asserted simultaneously. If this happens, the logic
Figure 5–53: MEMORY VOLTAGE LOGIC
 
SETTING GROUP 1(6) DISTANCE
PHS DIST Z1
FUNCTION: Disabled
PHS DIST Z1 DIR:
Forward
PHS DIST Z1
SHAPE: Mho
PHS DIST Z1 XFMR VOL
CONNECTION: None
PHS DIST Z1 XFMR CUR
CONNECTION: None
PHS DIST Z1
REACH: 2.00 ohms
PHS DIST Z1
RCA: 85°
D30 Line Distance Protection System
5.6 GROUPED ELEMENTS
setting. Any user-selected con-
FORCE SELF-POLAR
setting. Any user-selected
FORCE MEM-POLAR

PHASE DISTANCE Z1(Z5)
Range: Disabled, Enabled
Range: Forward, Reverse, Non-directional
Range: Mho, Quad
Range: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,
Yd5, Yd7, Yd9, Yd11
Range: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,
Yd5, Yd7, Yd9, Yd11
Range: 0.02 to 500.00 ohms in steps of 0.01
Range: 30 to 90° in steps of 1
5
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