GE Feeder Management Relay 750 User Manual

5-18 750/760 Feeder Management Relay GE Multilin
5.3 S2 SYSTEM SETUP 5 SETPOINTS
5
5.3.5 FLEXCURVES™
PATH: SETPOINTS ÖØ S2 SYSTEM SETUP ÖØ FLEXCURVE A(B)
Two user programmable FlexCurves™ can be stored in the relay. These can be used for time overcurrent protection in the
same manner as ANSI, IAC, and IEC curves. The custom FlexCurve™ has setpoints for entering times to trip at the follow-
ing current levels: 1.03, 1.05, 1.1 to 6.0 in steps of 0.1, and 6.5 to 20.0 in steps of 0.5. The relay then converts these points
to a continuous curve by linear interpolation between data points.
The following table shows all the pickup levels for which a trip time must be entered.
 FLEXCURVE A
 [ENTER] for more
CURVE TRIP TIME AT
1.03 x PU: 0 ms
Range: 0 to 65535 ms in steps of 1
CURVE TRIP TIME AT
1.05 x PU: 0 ms
Range: 0 to 65535 ms in steps of 1
↓
CURVE TRIP TIME AT
20.0 x PU: 0 ms
Range: 0 to 65535 ms in steps of 1
Table 5–1: FLEXCURVE™ TRIP TIMES
PICKUP
(I/I
pu
)
TRIP TIME
(ms)
PICKUP TRIP TIME PICKUP TRIP TIME PICKUP TRIP TIME
1.03 2.90 4.90 10.5
1.05 3.00 5.00 11.0
1.10 3.10 5.10 11.5
1.20 3.20 5.20 12.0
1.30 3.30 5.30 12.5
1.40 3.40 5.40 13.0
1.50 3.50 5.50 13.5
1.60 3.60 5.60 14.0
1.70 3.70 5.70 14.5
1.80 3.80 5.80 15.0
1.90 3.90 5.90 15.5
2.00 4.00 6.00 16.0
2.10 4.10 6.50 16.5
2.20 4.20 7.00 17.0
2.30 4.30 7.50 17.5
2.40 4.40 8.00 18.0
2.50 4.50 8.50 18.5
2.60 4.60 9.00 19.0
2.70 4.70 9.50 19.5
2.80 4.80 10.0 20.0
ENTER
ESCAPE
ð
ð
MESSAGE
ESCAPE
MESSAGE
ESCAPE
Courtesy of NationalSwitchgear.com

GE Feeder Management Relay 750 Specifications

General

Brand	GE
Model	Feeder Management Relay 750
Category	Protection Device
Language	English