GE D90 Plus - Page 361

CHAPTER 7: PROTECTION CONTROL ELEMENTS
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 351
Figure 296: Autoreclose closing logic, sheet 2 of 2
Terminal three-pole open
The autoreclose scheme employs dedicated logic to determine if all three poles are
opened at the local terminal. This signal is used in the preceding logic. For single-breaker
operation, the breaker status is sufficient to derive this signal. For dual-breaker operation
both breakers must either be open or out-of-service. If one breaker has been opened from
a bus protection, the
Bus Fault Initiate setting can be used to declare the terminal opened
when either breaker is opened. Alternately, a user-defined setting is available to generate
this signal.
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