GE 750 Instruction Manual page 246

S6 MONITORING
5 - 120
The 750/760 detects a VT fuse failure when there are significant levels of negative
sequence voltage without correspondingly significant levels of negative sequence current
measured at the output CTs. Also, if there is not a significant amount of positive sequence
voltage when there is positive sequence current then it could indicate that all the VT fuses
have been pulled or the VTs have been racked out.
FIGURE 5–55: VT Failure Logic
CHAPTER 5: SETPOINTS
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL