GE UR Series C70 Instruction Manual page 266

Capacitor bank protection and control system
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5.6 GROUPED ELEMENTS
c) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G)
PATH: SETTINGS
GROUPED ELEMENTS
GROUND IOC1
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
5
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
5-142
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
ETT NG
GROUND IOC1
PICKUP:
AND
RUN
IG ≥ PICKUP
Figure 5–65: GROUND IOC1 SCHEME LOGIC
C70 Capacitor Bank Protection and Control System
GROUND CURRENT
Range: Disabled, Enabled
Range: SRC 1, SRC 2
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
ETT NG
GROUND IOC1 PICKUP
DELAY:
GROUND IOC1 RESET
DELAY:
t
PKP
t
RST
5 SETTINGS
GROUND IOC1(12)
,
Disabled
FLEXLOG C OPE AND
GROUND IOC1 PKP
GROUND IOIC DPO
GROUND IOC1 OP
827037A4.VSD
GE Multilin

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