CHAPTER 5: SETPOINTS S5 OUTPUTS
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–103
interruption of current, unless wired in parallel with an electromechanical relay
(outputs 2 to 8) in which case it turns off when the relay operates.
• OUTPUT 1(8) TYPE: Select “Trip” to turn the Trip LED on or “Alarm” to turn the Alarm
LED on when this output operates. Otherwise, select “Control”. Note that the Trip LED
remains on until a reset command is issued (or automatically after one week). The
Alarm LED turns off automatically when the output is no longer operated.
• OUTPUT 1(8) FLEXLOGIC 01 to 20: The twenty (20) messages shown in the table below
are the parameters of the FlexLogic™ equation for output 1(8) as described in the
introduction to FlexLogic™.
Note
The relays can also be energized from individual protection elements.
Table 5–13: Output relay default FlexLogic™
FlexLogic™
gate
Output relay number
1 to 3 4 5 6 7 8
01 Percent Diff OP Volts/Hertz 1 OP W1 THD Level OP Underfreq 1 OP Underfreq 2 OP Freq Decay 3 OP
02 Inst Diff OP Volts/Hertz 2 OP W2 THD Level OP Freq Decay R1 OP Freq Decay R2 OP END
03 Any W1 OC OP OR (2 inputs) Xfmr Overload OP OR (2 inputs) OR (2 inputs) END
04 Any W2 OC OP END 5th HarmLevel OP END END END
05 OR (4 inputs) END OR (4 inputs) END END END
06 to 20 END END END END END END
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