GE N60 Instruction Manual page 354

GROUPED ELEMENTS
• Two-step operation — Similar to the three-step mode with two exceptions. First, the initial stage monitors the time
spent by the impedance locus between the outer and inner characteristics. Second, the stage involving the
SWING PICKUP DELAY 2
(POWER SWING
element fully operational.
The element can be set to use either lens (mho) or rectangular (quadrilateral) characteristics, as shown in the figure. When
set to "Mho," the element applies the right and left blinders as well. If the blinders are not required, set their settings high
enough to effectively disable the blinders.
5
5-194
timer is bypassed. It is up to the user to integrate the blocking
TRIP) FlexLogic operands with other protection functions and output contacts in order to make this
Figure 5-100: Power swing detect mho operating characteristics
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
POWER
(POWER SWING BLOCK) and tripping