5-152 B30 Bus Differential System GE Multilin
5.6 GROUPED ELEMENTS 5 SETTINGS
5
Figure 5–55: PHASE INSTANTANEOUS OVERCURRENT 1 SCHEME LOGIC
5.6.5 NEUTRAL CURRENT
a) NEUTRAL TIME OVERCURRENT (ANSI 51N, IEC PTOC)
PATH: SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) NEUTRAL CURRENT NEUTRAL TOC1(6)
The neutral time overcurrent element can provide a desired time-delay operating characteristic versus the applied current
or be used as a simple definite time element. The neutral current input value is a quantity calculated as 3Io from the phase
currents and may be programmed as fundamental phasor magnitude or total waveform RMS magnitude as required by the
application.
NEUTRAL TOC1
NEUTRAL TOC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEUTRAL TOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
MESSAGE
NEUTRAL TOC1
INPUT: Phasor
Range: Phasor, RMS
MESSAGE
NEUTRAL TOC1
PICKUP: 1.000 pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
NEUTRAL TOC1
CURVE: IEEE Mod Inv
Range: See OVERCURRENT CURVE TYPES table
MESSAGE
NEUTRAL TOC1
TD MULTIPLIER: 1.00
Range: 0.00 to 600.00 in steps of 0.01
MESSAGE
NEUTRAL TOC1
RESET: Instantaneous
Range: Instantaneous, Timed
MESSAGE
NEUTRAL TOC1 BLOCK:
Off
Range: FlexLogic operand
MESSAGE
NEUTRAL TOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
NEUTRAL TOC1
EVENTS: Disabled
Range: Disabled, Enabled
827033A8.CDR
AND
AND
AND
SETTING
1 = Enabled
Function
SETTING
= IA
Source
= IC
SETTINGS
= Off
Block A
= Off
Block B
= Off
Block C
SETTING
Pickup
RUN
IA > Pickup
RUN
IB > Pickup
RUN
IC > Pickup
= IB
SETTINGS
Pickup Delay
T
PKP
T
RST
Reset Delay
T
PKP
T
RST
T
PKP
T
RST
OR
FLEXLOGIC OPERANDS
PHASE IOC1 A PKP
PHASE IOC1 A DPO
PHASE IOC1 B PKP
PHASE IOC1 B DPO
PHASE IOC1 C PKP
PHASE IOC1 C DPO
PHASE IOC1 PKP
FLEXLOGIC OPERAND
PHASE IOC1 A OP
PHASE IOC1 B OP
PHASE IOC1 C OP
FLEXLOGIC OPERANDS
OR
PHASE IOC1 OP
FLEXLOGIC OPERAND
AND
PHASE IOC1 DPO
FLEXLOGIC OPERAND
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