210
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
GROUPED PROTECTION ELEMENTS
CHAPTER 7: PROTECTION
POWER SWING BLOCK............................Asserted when the power swing detection blocking element
operates.
POWER SWING INCOMING....................Asserted when an unstable power swing is detected (incoming
locus).
POWER SWING INNER.............................Asserted when the positive-sequence impedance is in the inner
characteristic.
POWER SWING MIDDLE..........................Asserted when the positive-sequence impedance is in the
middle characteristic.
POWER SWING OUTER............................Asserted when the positive-sequence impedance is in the outer
characteristic.
POWER SWING OUTGOING...................Asserted when an unstable power swing is detected (outgoing
locus).
POWER SWING TMR1 PKP .....................Asserted when power swing timer 1 picks up.
POWER SWING TMR2 PKP .....................Asserted when power swing timer 2 picks up.
POWER SWING TMR3 PKP .....................Asserted when power swing timer 3 picks up.
POWER SWING TMR4 PKP .....................Asserted when power swing timer 4 picks up.
POWER SWING UN/BLOCK....................Asserted when the out-of-step tripping function operates.
Select the
Settings > Protection > Elements > Group 1 > Power Swing Detect
menu item
to open the power swing detect configuration window.
Figure 187: Power swing detect configuration window
The following power swing detect settings are available. There is one power swing detect
element for each setting group.
