GE Multilin 489

5–80 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
FIGURE 5–18: Voltage Dependent Overload Curve (Custom)
Z Enter the per unit current value for the acceleration overload curve
intersect with the custom curve for 80% voltage.
Z Enter the per unit current and safe stall protection time for 80% voltage
(see the acceleration curves below).
Z Enter the per unit current value for the acceleration overload curve
intersect with the custom curve for 100% voltage.
Z Enter the per unit current and safe stall protection time for 100% voltage
(see the acceleration curves below).
489
VOLTAGE DEPENDENT OVERLOAD
(CUSTOM CURVE)
808827A3.CDR
1
12
3
4
56
7
8
2
3
4
5
6
7
8
9
10
20
30
40
50
60
70
80
90
100
TIME TO TRIP (SECONDS)
MULTIPLES OF FULL LOAD AMPS
200
300
400
500
600
700
800
900
1000
Acceleration Intersect at 80%V
Acceleration Intersect at 100%V
GE Multilin
Courtesy of NationalSwitchgear.com