GE C60 User Manual

5-182 C60 Breaker Protection System GE Multilin
5.6 GROUPED ELEMENTS 5 SETTINGS
5
The C60 contains protection elements for ground time overcurrent (ANSI device 51G) and ground instantaneous overcur-
rent (ANSI device 50G). A maximum of six ground time overcurrent and eight ground instantaneous overcurrent elements
are available, dependent on the CT/VT modules ordered with the relay. See the following table for details.
b) GROUND TIME OVERCURRENT (ANSI 51G, IEC PTOC)
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  GROUND CURRENT  GROUND TOC1(4)
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.
CT/VT MODULES GROUND CURRENT ELEMENTS
SLOT F SLOT M TIME
OVERCURRENT
INSTANTANEOUS
OVERCURRENT
8F/8G 8F/8G 4 4
8H/8J 6 6
8H/8J 8F/8G 6 6
8H/8J 6 8
 GROUND TOC1

GROUND TOC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
GROUND TOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
GROUND TOC1
INPUT: Phasor
Range: Phasor, RMS
MESSAGE
GROUND TOC1
PICKUP: 1.000 pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
GROUND TOC1
CURVE: IEEE Mod Inv
Range: see the Overcurrent Curve Types table
MESSAGE
GROUND TOC1
TD MULTIPLIER: 1.00
Range: 0.00 to 600.00 in steps of 0.01
MESSAGE
GROUND TOC1
RESET: Instantaneous
Range: Instantaneous, Timed
MESSAGE
GROUND TOC1 BLOCK:
Off
Range: FlexLogic operand
MESSAGE
GROUND TOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
GROUND TOC1
EVENTS: Disabled
Range: Disabled, Enabled
NOTE
NOTE

GE C60 Specifications

General

Brand	GE
Model	C60
Category	Relays
Language	English