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CHAPTER 5: SETPOINTS
Note
NOTE
FlexLogic™
gate
1 to 3
01
Percent Diff OP
02
Inst Diff OP
03
Any W1 OC OP
04
Any W2 OC OP
05
OR (4 inputs)
06 to 20
END
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
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™.
The relays can also be energized from individual protection elements.
Table 5–13: Output relay default FlexLogic™
4
Volts/Hertz 1 OP
W1 THD Level OP
Volts/Hertz 2 OP
W2 THD Level OP
OR (2 inputs)
Xfmr Overload OP
END
5th HarmLevel OP
END
OR (4 inputs)
END
END
Output relay number
5
6
Underfreq 1 OP
Freq Decay R1 OP Freq Decay R2 OP
OR (2 inputs)
END
END
END
S5 OUTPUTS
7
8
Underfreq 2 OP
Freq Decay 3 OP
END
OR (2 inputs)
END
END
END
END
END
END
END
5–103
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