GE L60 Instruction Manual page 329

5 SETTINGS
b) NEGATIVE SEQUENCE TIME OVERCURRENT (ANSI 51Q, IEC PTOC)

PATH: SETTINGS GROUPED ELEMENTS
 NEG SEQ TOC1

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
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
Characteristics 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
"Instantaneous" 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
Figure 5–100: NEGATIVE SEQUENCE TOC1 SCHEME LOGIC
GE Multilin
 
SETTING GROUP 1(6) NEGATIVE SEQUENCE CURRENT
NEG SEQ TOC1
FUNCTION: Disabled
NEG SEQ TOC1 SIGNAL
SOURCE: SRC 1
NEG SEQ TOC1
PICKUP: 1.000 pu
NEG SEQ TOC1
CURVE: IEEE Mod Inv
NEG SEQ TOC1
TD MULTIPLIER: 1.00
NEG SEQ TOC1
RESET: Instantaneous
NEG SEQ TOC1 BLOCK:
Off
NEG SEQ TOC1
TARGET: Self-reset
NEG SEQ TOC1
EVENTS: Disabled
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
AND
t
L60 Line Phase Comparison System
5.5 GROUPED ELEMENTS

NEG SEQ TOC1(2)
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
FLEXLOGIC OPERANDS
NEG SEQ TOC1 PKP
NEG SEQ TOC1 DPO
NEG SEQ TOC1 OP
827057A4.CDR
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