GE b30 Instruction Manual page 376

CONTROL ELEMENTS
The operation of "Synch/Restore" mode is similar to the "Synchronize" mode. The only difference is that after an
unsuccessful synchronization attempt, the switch attempts to restore the position stored in the relay memory. The "Synch/
Restore" mode is useful for applications where the selector switch is employed to change the setting group in redundant
(two relay) protection schemes.
SELECTOR 1 EVENTS
Event name
SELECTOR 1 POS Z
SELECTOR 1 STP ALARM
SELECTOR 1 BIT ALARM
The following figures illustrate the operation of the selector switch. In these diagrams, "T" represents a time-out setting.
5
5-210
— If enabled, the following events are logged:
Description
Selector 1 changed its position to Z
The selector position pre-selected via the stepping up control input has not been confirmed before the
time out
The selector position pre-selected via the three-bit control input has not been confirmed before the time
out
CHAPTER 5: SETTINGS
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL