GE 750 User Manual

GE Power Management 750/760 Feeder Management Relay 12-
41
12 S5 PROTECTION 12.6 NEGATIVE SEQUENCE
12
12.6 NEGATIVE SEQUENCE 12.6.1 DESCRIPTION
Separate protection is provided for the calculated negative sequence time overcurrent, instantaneous overcur-
rent and voltage. Each of these features can be individually blocked by logic inputs.
12.6.2 NEGATIVE SEQUENCE TIME OVERCURRENT
A time overcurrent element operating on the negative sequence component of current, ANSI device 46 is pro-
grammed in this subgroup.
■ NEG SEQ TIME OC
■ [ENTER] for more
The Negative Sequence Time Overcurrent setpoints path is:
\ SETPOINTS \ S5 PROTECTION \ NEGATIVE SEQUENCE \ NEG SEQ TIME OC
NEG SEQ TIME OC
FUNCTION: Disabled
Range: Disabled, Trip, Trip & AR, Alarm, Latched Alarm, Control
Select the required function.
NEG SEQ TIME OC
RELAYS (3-7): -----
Range: Any Combination of the 3-7 AUXILIARY Relays
Select the output relays required.
NEG SEQ TIME OC
PICKUP: 1.00 x CT
Range: 0.05 to 20.00 in steps of 0.01 x CT
Select the current level required.
NEG SEQ TIME OC
CURVE: Ext Inverse
Range: Ext Inverse, Very Inverse, Norm Inverse, ..., Flex Curve B
See description in Section 12.1: TIME OVERCURRENT CURVE CHARAC-
TERISTICS on page 12–1.
NEG SEQ TIME OC
MULTIPLIER: 1.00
Range: 0.00 to 100.00 in steps of 0.01
See description in Section 12.1: TIME OVERCURRENT CURVE CHARAC-
TERISTICS on page 12–1.
NEG SEQ TIME OC
RESET: Instantaneous
Range: Instantaneous, Linear
See description in Section 12.1: TIME OVERCURRENT CURVE CHARAC-
TERISTICS on page 12–1.
NEG SEQ TIME OC
DIRECTION: Disabled
Range: Disabled, Forward, Reverse
Select the direction(s) of current flow for which operation is permitted.

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English