GE L90 Instruction Manual page 217

5 SETTINGS
b) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G)
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PATH: SETTINGS GROUPED ELEMENTS
# GROUND IOC1
#
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The Ground Instantaneous Overcurrent element may be used as an instantaneous element with no intentional delay or as
a Definite Time element. The ground current input is the quantity measured by the ground input CT and is the fundamental
phasor magnitude.
SETTING
GROUND IOC1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
GROUND IOC1
SOURCE:
IG
SETTING
GROUND IOC1
BLOCK:
Off = 0
These elements measure the current that is connected to the ground channel of a CT/VT module. The conversion
range of a standard channel is from 0.02 to 46 times the CT rating.
NOTE
GE Multilin
! !"
SETTING GROUP 1(6)
GROUND IOC1
FUNCTION: Disabled
GROUND IOC1 SIGNAL
SOURCE: SRC 1
GROUND IOC1
PICKUP: 1.000 pu
GROUND IOC1 PICKUP
DELAY: 0.00 s
GROUND IOC1 RESET
DELAY: 0.00 s
GROUND IOC1 BLOCK:
Off
GROUND IOC1
TARGET: Self-reset
GROUND IOC1
EVENTS: Disabled
SETTINGS
GROUND IOC1 PICKUP
SETTING
DELAY:
GROUND IOC1
GROUND IOC1 RESET
PICKUP:
DELAY:
AND RUN
t
PKP
IG ≥ PICKUP
Figure 5–75: GROUND IOC1 SCHEME LOGIC
L90 Line Differential Relay
5.5 GROUPED ELEMENTS
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GROUND CURRENT GROUND IOC1(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: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic™ operand
Range: Self-reset, Latched
Range: Disabled, Enabled
FLEXLOGIC OPERANDS
GROUND IOC1 PKP
GROUND IOIC DPO
GROUND IOC1 OP
t
RST
827037A4.VSD
,
Disabled
5
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