GE B30 Instruction Manual page 289

5 SETTINGS
This element can provide a desired time-delay operating characteristic versus the applied current or be used as a simple
definite time element. The ground current input value is the quantity measured by the ground input CT and is the funda-
mental phasor or RMS magnitude. Two methods of resetting operation are available: "Timed" and "Instantaneous" (see the
Inverse TOC Curve Characteristics section for details). When the element is blocked, the time accumulator will reset
according to the reset characteristic. For example, if the element reset characteristic is set to "Instantaneous" and the ele-
ment is blocked, the time accumulator will be cleared immediately.
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
This channel may be also equipped with a sensitive input. The conversion range of a sensitive channel is from
0.002 to 4.6 times the CT rating.
NOTE
SETTING
GROUND TOC1
FUNCTION:
Enabled = 1
SETTING
GROUND TOC1
SOURCE:
IG
SETTING
GROUND TOC1
BLOCK:
Off = 0
b) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G, IEC PIOC)

PATH: SETTINGS GROUPED ELEMENTS
 GROUND IOC1

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
GE Multilin
SETTINGS
GROUND TOC1
INPUT:
GROUND TOC1
PICKUP:
GROUND TOC1
CURVE:
GROUND TOC1
TD MULTIPLIER:
GROUND TOC 1
RESET:
AND RUN
t
I
Figure 5–58: GROUND TOC1 SCHEME LOGIC
 
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
B30 Bus Differential System
5.6 GROUPED ELEMENTS
FLEXLOGIC OPERANDS
GROUND TOC1 PKP
GROUND TOC1 DPO
IG PICKUP
GROUND TOC1 OP

GROUND CURRENT GROUND IOC1(6)
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
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
827036A4.VSD
,
Disabled
5-155