GE L30 Instruction Manual page 271

5 SETTINGS
c) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G)
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.
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
ETT NG
GROUND IOC1
FUNCTION:
Disabled = 0
Enabled = 1
ETT NG
GROUND IOC1
SOURCE:
IG
ETT NG
GROUND IOC1
BLOCK:
Off = 0
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
ETT NG
GROUND IOC1 PICKUP
ETT NG
DELAY:
GROUND IOC1
GROUND IOC1 RESET
PICKUP:
DELAY:
AND RUN
t
PKP
IG ≥ PICKUP
Figure 5–60: GROUND IOC1 SCHEME LOGIC
L30 Line Current Differential System
5.6 GROUPED ELEMENTS
GROUND CURRENT GROUND IOC1(2)
Range: Disabled, Enabled
Range: SRC 1, SRC 2
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
FLEXLOG C OPE AND
GROUND IOC1 PKP
GROUND IOIC DPO
GROUND IOC1 OP
t
RST
827037A4.VSD
,
Disabled
5
5-135