Negative Sequence Current - GE L60 Instructions Manual

GROUPED ELEMENTS
The ground instantaneous overcurrent element can be used as an instantaneous element with no intentional delay or as a
definite time element. The ground current input is the quantity measured by the ground input CT and is the fundamental
phasor magnitude.
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.

5.6.12 Negative sequence current

5
5.6.12.1 Menu
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  NEGATIVE SEQUENCE CURRENT
 NEGATIVE SEQUENCE
 CURRENT
The L60 provides two negative-sequence time overcurrent elements, two negative-sequence instantaneous overcurrent
elements, and two negative-sequence directional overcurrent elements. For information on the negative sequence time
overcurrent curves, see the Inverse TOC Curve Characteristics section earlier.
5.6.12.2 Negative sequence time overcurrent (ANSI 51Q, IEC PTOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  NEGATIVE SEQUENCE CURRENT  NEG SEQ TOC1(2)
 NEG SEQ TOC1

5-270
Figure 5-149: Ground IOC1 logic
 NEG SEQ TOC1


 NEG SEQ TOC2


 NEG SEQ IOC1


 NEG SEQ IOC2


 NEG SEQ DIR OC1


 NEG SEQ DIR OC2


NEG SEQ TOC1

FUNCTION: Disabled
NEG SEQ TOC1 SIGNAL

SOURCE: SRC 1
See below
See page 5-271
See page 5-272
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS