GE b30 - Page 289

GE Multilin B30 Bus Differential System 5-155
5 SETTINGS 5.6 GROUPED ELEMENTS
5
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.
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.
Figure 5–58: GROUND TOC1 SCHEME LOGIC
b) GROUND INSTANTANEOUS OVERCURRENT (ANSI 50G, IEC PIOC)
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  GROUND CURRENT  GROUND IOC1(6)
 GROUND IOC1

GROUND IOC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
GROUND IOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
MESSAGE
GROUND IOC1
PICKUP: 1.000 pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
GROUND IOC1 PICKUP
DELAY: 0.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
GROUND IOC1 RESET
DELAY: 0.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
GROUND IOC1 BLOCK:
Off
Range: FlexLogic operand
MESSAGE
GROUND IOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
GROUND IOC1
EVENTS: Disabled
Range: Disabled, Enabled
NOTE
NOTE
SETTING
GROUND TOC1
FUNCTION:
Enabled = 1
SETTING
GROUND TOC1
SOURCE:
IG
GROUND TOC1
BLOCK:
Off = 0
FLEXLOGIC OPERANDS
GROUND TOC1 DPO
GROUND TOC1 OP
GROUND TOC1
CURVE:
GROUND TOC1
TD MULTIPLIER:
GROUND TOC 1
RESET:
SETTINGS
SETTING
IG PICKUP
I
t
GROUND TOC1
PICKUP:
RUN
827036A4.VSD
GROUND TOC1
INPUT:
AND
GROUND TOC1 PKP