GE D90 Plus Instruction Manual page 385

CHAPTER 7: PROTECTION
Three VT breaker flashover application
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 313: Breaker flashover logic, sheet 1 of 2
Figure 314: Breaker flashover logic, sheet 2 of 2
When only one set of VTs is available across the breaker, set the
detect an open breaker condition in this application, the scheme checks if the per-phase
voltages were recovered (picked up), the status of the breaker is open (contact input
CONTROL ELEMENTS
setting to "None." To
Side 2
375