Ground Distance Zone 1 Op Scheme; Ground Distance Zone 2 Op Scheme - GE T60 Instruction Manual

5 SETTINGS
FLEXLOGIC OPERAND
GND DIST Z1 PKP A
FLEXLOGIC OPERAND
GND DIST Z1 PKP B
FLEXLOGIC OPERAND
GND DIST Z1 PKP C
FLEXLOGIC OPERANDS
GND DIST Z1 SUPN IN
OPEN POLE OP **
** D60, L60, and L90 only. Other UR-series models apply regular current seal-in for zone 1.
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
NOTE
functionality.
GE Multilin
SETTING
GND DIST Z1 DELAY
T
PKP
0
T
PKP
0
T
PKP
0
AND
Figure 5–84: GROUND DISTANCE ZONE 1 OP SCHEME
Figure 5–85: GROUND DISTANCE ZONE 2 OP SCHEME
T60 Transformer Protection System
5.6 GROUPED ELEMENTS
FLEXLOGIC OPERANDS
GND DIST Z1 OP A
GND DIST Z1 OP B
AND
GND DIST Z1 OP C
OR
FLEXLOGIC OPERAND
AND
GND DIST Z1 OP
OR OR
AND
OR
5
837018A7.CDR
5-197