9424200994 Rev N 155
• In Anticipatory mode:
o Breaker Close Time setting must be set above zero (0)
• In PLL mode:
o Max Slip setting must be set higher than Min Slip setting and zero (0)
o Breaker Close Angle setting must be set above zero (0)
Status Output
The Status logic output becomes true when all of the synchronization parameters above are met and the
generator and bus voltages are stable.
Close Breaker Output
The Close Breaker logic output signals the breaker to close when ALL of the following conditions are met:
• Generator and bus voltages are stable
• Phase angle between sources are less than the Breaker Closing Angle setting (Phase Lock Loop
only)
• Frequency error between sources is less than the Slip Frequency setting. (Note: When the
Source Freq > Destination Freq setting box is checked, only generator frequency greater than
bus frequency is allowed.)
• Voltage magnitude between sources is less than Voltage Difference setting. (Note: The voltage
used by the BE1-11g for this feature is a voltage magnitude measurement, not a voltage phasor
measurement. When the Voltage Source > Voltage Destination setting box is checked, only
generator voltage greater than bus voltage is allowed.)
The Close Breaker output will remain logic 1 until the BRKSTAT (Breaker Status) logic element becomes
true, a Sync Failure occurs, or the synchronization parameters are no longer true.
Breaker Status
The synchronizer will not operate if the BKRSTAT logic element = 1. Breaker status is monitored via the
Breaker Status logic element. Information on setting up the breaker status logic can be found in the
Breaker Monitoring chapter.
Logic Connections
Synchronizer element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus. The
synchronizer element logic block is illustrated in Figure 97. Logic inputs and outputs are summarized in
Table 59.
BE1-11g Synchronizer (25A)
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