GE D90 Plus - Page 224

214 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 to
open the power swing detect configuration window.
Figure 191: Power swing detect configuration window
The following power swing detect settings are available. There is one power swing detect
element for each setting group.