Negative Sequence Current - GE C70 Instruction Manual

5 SETTINGS
c) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G, IEC PIOC)

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
a) MAIN MENU

PATH: SETTINGS GROUPED ELEMENTS
 NEGATIVE SEQUENCE
 CURRENT
MESSAGE
The C70 relay provides two (2) negative-sequence directional overcurrent elements..
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
Figure 5–72: GROUND IOC1 SCHEME LOGIC

SETTING GROUP 1(6)
 NEG SEQ DIR OC1

 NEG SEQ DIR OC2

C70 Capacitor Bank Protection and Control System
5.6 GROUPED ELEMENTS
 
GROUND CURRENT GROUND IOC1(12)
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

5.6.7 NEGATIVE SEQUENCE CURRENT


NEGATIVE SEQUENCE CURRENT
See page 5–172.
See page 5–172.
,
Disabled
5
5-171