GE L60 Instructions Manual page 412

GROUPED ELEMENTS
POS SEQ di/dt FDL SEAL-IN
terminals of the line, the timer is started at the rising edge of the raw di / dt condition.
POS SEQ di/dt FDH PICKUP
operation. Nominal current of the phase CT bank of the relay is 1pu.
POS SEQ di/dt FDH SEAL-IN
of the line, the timer is started at the rising edge of the raw di / dt condition. In this way, the fault detectors reset
approximately at the same time at all line terminals, regardless of responses of individual raw conditions potentially
different at different line terminals.
POS SEQ FDH SUPV
faults starting as non-symmetrical defined by the
function typically is assigned with this setting.
— Note that the fault detector is hard-wired to the 87PC scheme. It can be disabled permanently using
POS SEQ di/dt BLK
the function setting, or blocked temporarily using this block setting. Select a FlexLogic operand that, if asserted, blocks this
fault detector.
POS SEQ di/dt FD TARGET
targets.
POS SEQ di/dt FD EVENTS
from the 87PC events.
5
5.6.3.7 Negative-sequence overcurrent fault detection
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE COMPARISON ELEMENTS  ADVANCED FAULT
DETECTORS  NEGATIVE-SEQUENCE CURRENT
 NEGATIVE-SEQUENCE
 CURRENT
5-204
— This setting defines seal-in time of the FDL function. To equalize the response between all
— This setting controls pickup of the high set stage of the element used to control the trip
— This setting defines seal-in time of the function. To equalize the response between all terminals
— This setting provides seal-in control of the FDH function for the symmetrical external three-phase
— This setting controls targets of the function. These targets operate independently from the 87PC
— This setting controls event recording of the function. These events are logged independently
Figure 5-102: Positive-sequence current rate of change fault detector logic
NEG SEQ I_2 FD

FUNCTION: Disabled
NEG SEQ I_2 FDL

PICKUP: 0.10 pu
NEG SEQ I_2 FDH

PICKUP: 0.50 pu
NEG SEQ I_2 BLK:

Off
NEG SEQ I_2 FD

TARGET: Self-reset
NEG SEQ I_2 FD

EVENTS: Disabled
setting time. The overreaching distance
POS SEQ di/dt FDH SEAL-IN
Range: Disabled, Enabled
Range: 0.02 to 5.00 pu in steps of 0.01
Range: 0.05 to 15.00 pu in steps of 0.01
Range: FlexLogic operand
Range: Self-Reset, Latched, Disabled
Range: Disabled, Enabled
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS