GE D90 Plus Instruction Manual page 309

CHAPTER 7: PROTECTION
Terminal closed
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
• Breaker 2 issues a manual close and sequence 1 is not selected and breaker 1 is either
open or out-of-service.
Alternately, a user-defined setting is available to generate this signal.
Figure 242: Autoreclose scheme manual close logic
The close logic uses the status of each breaker to determine whether the terminal is
closed. For single breaker applications, it is necessary to monitor the closed status of the
particular breaker. For dual breaker applications, the logic checks that either or both
breakers are closed and not out-of-service. Alternately, a user-defined setting is available
to generate this signal.
Figure 243: Autoreclose scheme closing logic, sheet 1 of 2
CONTROL ELEMENTS
301