Ground Current - GE L30 Instruction Manual

5 SETTINGS
a) MAIN MENU

PATH: SETTINGS GROUPED ELEMENTS
 GROUND CURRENT

MESSAGE
MESSAGE
MESSAGE
b) GROUND TIME OVERCURRENT (ANSI 51G, IEC PTOC)

PATH: SETTINGS GROUPED ELEMENTS
 GROUND TOC1

MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
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
GE Multilin
 
SETTING GROUP 1(6)

GROUND CURRENT

 GROUND TOC1

 GROUND TOC2

 GROUND IOC1

↓
 GROUND IOC4

 
SETTING GROUP 1(6) GROUND CURRENT
GROUND TOC1
FUNCTION: Disabled
GROUND TOC1 SIGNAL
SOURCE: SRC 1
GROUND TOC1
INPUT: Phasor
GROUND TOC1
PICKUP: 1.000 pu
GROUND TOC1
CURVE: IEEE Mod Inv
GROUND TOC1
TD MULTIPLIER: 1.00
GROUND TOC1
RESET: Instantaneous
GROUND TOC1 BLOCK:
Off
GROUND TOC1
TARGET: Self-reset
GROUND TOC1
EVENTS: Disabled
L30 Line Current Differential System
5.6 GROUPED ELEMENTS
5.6.6 GROUND CURRENT
See page 5-185.
See page 5-185.
See page 5-186.
See page 5-186.

GROUND TOC1(2)
Range: Disabled, Enabled
Range: SRC 1, SRC 2
Range: Phasor, RMS
Range: 0.000 to 30.000 pu in steps of 0.001
Range: see the Overcurrent Curve Types table
Range: 0.00 to 600.00 in steps of 0.01
Range: Instantaneous, Timed
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5
5-185