GE c60 Instruction Manual page 318

GROUPED ELEMENTS
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
fundamental 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 resets
according to the reset characteristic. For example, if the element reset characteristic is set to "Instantaneous" and the
element is blocked, the time accumulator is 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 can 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
5
SETTING
GROUND TOC1
FUNCTION:
Enabled = 1
SETTING
GROUND TOC1
SOURCE:
IG
SETTING
GROUND TOC1
BLOCK:
Off = 0
5.7.5.3 Ground instantaneous overcurrent (ANSI 50G, IEC PIOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  GROUND CURRENT  GROUND IOC1(8)
 GROUND IOC1

5-192
GROUND TOC1

TARGET: Self-reset
GROUND TOC1

EVENTS: Disabled
Figure 5-93: Ground TOC1 logic
SETTINGS
GROUND TOC1
INPUT:
GROUND TOC1
PICKUP:
GROUND TOC1
CURVE:
GROUND TOC1
TD MULTIPLIER:
GROUND TOC 1
RESET:
AND RUN
t
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
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
FLEXLOGIC OPERANDS
GROUND TOC1 PKP
GROUND TOC1 DPO
IG PICKUP
GROUND TOC1 OP
I
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
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
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
827036A4.VSD