GE T60 Instruction Manual page 396

GROUPED ELEMENTS
5
For phase distance zone 2, there is a provision to start the zone timer with other distance zones or loop the pickup
flag to avoid prolonging phase distance zone 2 operation when the fault evolves from one type to another or
migrates from the initial zone to zone 2. Assign the required zones in the trip output function to accomplish this
functionality.
5-214
Figure 5-111: Phase distance zone 1 OP logic
Figure 5-112: Phase distance zone 2 OP logic
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS