GE Multilin T60 Transformer Protection System 5-197
5 SETTINGS 5.6 GROUPED ELEMENTS
5
Figure 5–84: GROUND DISTANCE ZONE 1 OP SCHEME
Figure 5–85: GROUND DISTANCE ZONE 2 OP SCHEME
For ground distance zone 2, there is a provision to start the zone timer with the other distance zones or loop pickup
flags to avoid prolonging ground distance zone 2 operation if the fault evolves from one type to another or migrates
from zone 3 or 4 to zone 2. The desired zones should be assigned in the trip output element to accomplish this
functionality.
837018A7.CDR
AND
AND
AND
OR
OR
OR
OR
** D60, L60, and L90 only. Other UR-series models apply regular current seal-in for zone 1.
AND
FLEXLOGIC OPERAND
GND DIST Z1 PKP A
GND DIST Z1 SUPN IN
OPEN POLE OP **
FLEXLOGIC OPERANDS
SETTING
GND DIST Z1 DELAY
T
PKP
0
T
PKP
0
T
PKP
0
FLEXLOGIC OPERAND
GND DIST Z1 PKP B
FLEXLOGIC OPERAND
GND DIST Z1 PKP C
GND DIST Z1 OP A
GND DIST Z1 OP B
FLEXLOGIC OPERANDS
GND DIST Z1 OP C
FLEXLOGIC OPERAND
GND DIST Z1 OP
OR
AND
OR
837037A1.CDR
from the open pole detector element D60, L60, and L90 only)
FLEXLOGIC OPERAND
OPEN POLE OP **
FLEXLOGIC OPERAND
GND DIST Z2 PKP A
FLEXLOGIC OPERAND
GND DIST Z2 PKP B
FLEXLOGIC OPERAND
GND DIST Z2 PKP C
TIMER
0 ms
20 ms
TIMER
0 ms
20 ms
TIMER
0 ms
20 ms
SETTING
GND DIST Z2 DELAY
T
PKP
0
SETTING
GND DIST Z2 DELAY
T
PKP
0
SETTING
GND DIST Z2 DELAY
T
PKP
0
FLEXLOGIC OPERAND
GND DIST Z2 OP A
FLEXLOGIC OPERAND
GND DIST Z2 OP B
FLEXLOGIC OPERAND
GND DIST Z2 OP C
FLEXLOGIC OPERAND
GND DIST Z2 OP
FLEXLOGIC OPERAND
TRIP Z2 GR TMR INIT
OR
OR
OR
AND
OR
AND
OR
AND
AND
AND
from the trip output element
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