GE t60 Instruction Manual page 178

5.5 GROUPED ELEMENTS
c) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G)
PATH: SETTINGS GROUPED ELEMENTS
GROUND IOC1
The Ground IOC element may be used as an instantaneous element with no intentional delay or as a Definite Time ele-
5
ment. 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. This channel
may be equipped with a standard or sensitive input. The conversion range of a standard channel is from 0.02 to 46
times the CT rating. The conversion range of a sensitive channel is from 0.002 to 4.6 times the CT rating.
NOTE
5-100
SETTING GROUP 1(6)
GROUND IOC1
FUNCTION: Disabled
GROUND IOC1 SIGNAL
MESSAGE
SOURCE: SRC 1
GROUND IOC1
MESSAGE
PICKUP:
GROUND IOC1 PICKUP
MESSAGE
DELAY:
GROUND IOC1 RESET
MESSAGE
DELAY:
GROUND IOC1 BLOCK:
MESSAGE
Off
GROUND IOC1
MESSAGE
TARGET: Self-reset
GROUND IOC1
MESSAGE
EVENTS: Disabled
SETTING
GROUND IOC1
PICKUP:
RUN
AND
IG ≥ PICKUP
Figure 5–54: GROUND IOC1 SCHEME LOGIC
T60 Transformer Management Relay
GROUND 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
1.000 pu
Range: 0.00 to 600.00 s in steps of 0.01
0.00 s
Range: 0.00 to 600.00 s in steps of 0.01
0.00 s
Range: FlexLogic™ operand
Range: Self-reset, Latched
Range: Disabled, Enabled
SETTINGS
GROUND IOC1 PICKUP
DELAY:
GROUND IOC1 RESET
DELAY:
t
PKP
t
RST
5 SETTINGS
GROUND IOC1(8)
,
Disabled
FLEXLOGIC OPERANDS
GROUND IOC1 PKP
GROUND IOIC DPO
GROUND IOC1 OP
827037A4.VSD
GE Multilin