Phase Distance; Memory Voltage Logic - GE T60 Instruction Manual

5.6 GROUPED ELEMENTS
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
5
time. When the selected operand is de-asserted (logic 0), the distance functions follow other conditions of the memory volt-
age logic.
The
FORCE SELF-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 T60. It is not supported by the HardFiber, which maintains the original distance
element timing.
NOTE
b) PHASE DISTANCE

PATH: SETTINGS
 PHASE DISTANCE Z1

5-182
and settings should never be asserted simultaneously. If this happens, the logic
FORCE MEM-POLAR
Figure 5–70: MEMORY VOLTAGE LOGIC

GROUPED ELEMENTS SETTING GROUP 1(6)
PHS DIST Z1
FUNCTION: Disabled
PHS DIST Z1 DIR:
MESSAGE
Forward
PHS DIST Z1
MESSAGE
SHAPE: Mho
PHS DIST Z1 XFMR VOL
MESSAGE
CONNECTION: None
PHS DIST Z1 XFMR CUR
MESSAGE
CONNECTION: None
PHS DIST Z1
MESSAGE
REACH:
T60 Transformer Protection System
FORCE SELF-POLAR
FORCE MEM-POLAR
 
DISTANCE 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
2.00 ohms
5 SETTINGS
setting. Any user-selected con-
setting. Any user-selected
GE Multilin