GE G60 Instruction Manual page 442

GROUPED ELEMENTS
5
The FlexLogic output operands for the power swing detect element are as follows:
•
POWER SWING
POWER SWING TMR4 PKP
•
POWER SWING BLOCK
•
POWER SWING UN/BLOCK
subsequently unblocked when a fault occurs after the power swing blocking condition has been established
•
POWER SWING 50DD
operand triggers on faults occurring during power swing conditions. This includes both three-phase and single-pole-
open conditions.
•
POWER SWING INCOMING
characteristic)
•
POWER SWING OUTGOING
characteristic). This operand can be used to count unstable swings and take certain action only after a pre-defined
number of unstable power swings.
•
POWER SWING TRIP
The settings for the power swing detect element are as follows.
POWER SWING FUNCTION
both power swing blocking and out-of-step tripping functions.
POWER SWING SOURCE
POWER SWING SHAPE
characteristics of the power swing detect element. The operating principle is not affected. The "Mho" characteristics use
the left and right blinders.
5-228
Figure 5-122: Power swing detect quadrilateral operating characteristics
OUTER, POWER SWING MIDDLE, POWER SWING
are auxiliary operands that facilitate testing and special applications
blocks selected protection elements, such as distance functions
blocks those protection elements that are intended to be blocked under power swings, but
indicates that an adaptive disturbance detector integrated with the element has picked up. This
indicates an unstable power swing with an incoming locus (the locus enters the inner
indicates an unstable power swing with an outgoing locus (the locus leaving the outer
is a trip command
— This setting enables and disables the power swing detection element. The setting applies to
— The source setting identifies the signal source for both blocking and tripping functions.
— This setting selects the shapes (either "Mho" or "Quad") of the outer, middle, and inner
INNER, POWER SWING TMR2 PKP,
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
PKP, and
POWER SWING TMR3