GE L90 Instruction Manual page 218

5.5 GROUPED ELEMENTS
a) NEGATIVE SEQUENCE TIME OVERCURRENT (ANSI 51_2)
"
PATH: SETTINGS GROUPED ELEMENTS
# NEG SEQ TOC1
#
5
The negative sequence time overcurrent element may be used to determine and clear unbalance in the system. The input
for calculating negative sequence current is the fundamental phasor value.
Two methods of resetting operation are available; "Timed" and "Instantaneous" (refer to the Inverse Time Overcurrent Char-
acteristics sub-section for details on curve setup, trip times and reset operation). When the element is blocked, the time
accumulator will reset according to the reset characteristic. For example, if the element reset characteristic is set to "Instan-
taneous" and the element is blocked, the time accumulator will be cleared immediately.
SETTING
NEG SEQ TOC1 FUNCTION:
Disabled=0
Enabled=1
SETTING
NEG SEQ TOC1 BLOCK:
Off=0
SETTING
NEG SEQ TOC1 SOURCE:
Neg Seq
5-128
!"
SETTING GROUP 1(6)
NEG SEQ TOC1
FUNCTION: Disabled
NEG SEQ TOC1 SIGNAL
MESSAGE
SOURCE: SRC 1
NEG SEQ TOC1
MESSAGE
PICKUP: 1.000 pu
NEG SEQ TOC1
MESSAGE
CURVE: IEEE Mod Inv
NEG SEQ TOC1
MESSAGE
TD MULTIPLIER: 1.00
NEG SEQ TOC1
MESSAGE
RESET: Instantaneous
NEG SEQ TOC1 BLOCK:
MESSAGE
Off
NEG SEQ TOC1
MESSAGE
TARGET: Self-reset
NEG SEQ TOC1
MESSAGE
EVENTS: Disabled
AND
Figure 5–76: NEGATIVE SEQUENCE TOC1 SCHEME LOGIC
L90 Line Differential Relay
5.5.11 NEGATIVE SEQUENCE CURRENT
!"
NEGATIVE SEQUENCE CURRENT
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: 0.000 to 30.000 pu in steps of 0.001
Range: see OVERCURRENT CURVE TYPES table
Range: 0.00 to 600.00 in steps of 0.01
Range: Instantaneous, Timed
Range: FlexLogic™ operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
SETTING
NEG SEQ TOC1 INPUT:
NEG SEQ TOC1 PICKUP:
NEG SEQ TOC1 CURVE:
NEG SEQ TOC1 TD MULTIPLIER:
NEG SEQ TOC1 RESET:
<
RUN NEG SEQ PICKUP
t
5 SETTINGS
!
NEG SEQ TOC1(2)
FLEXLOGIC OPERANDS
NEG SEQ TOC1 PKP
NEG SEQ TOC1 DPO
NEG SEQ TOC1 OP
827057A4.CDR
GE Multilin