GE 489 Instruction Manual page 98

4.10 S9 THERMAL MODEL
The following curves illustrate the resultant overload protection for 80% and 100% voltage, respectively. For voltages inbe-
tween these levels, the 489 shifts the acceleration curve linearly and constantly based upon the measured voltage during
generator start.
GE Power Management
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Figure 4–16: VOLTAGE DEPENDENT O/L PROTECTION AT 80% AND 100% VOLTAGE
4-60
489
VOLTAGE DEPENDENT OVERLOAD
PROTECTION AT 80% V
4 5 6 7
MULTIPLES OF FULL LOAD AMPS
489 Generator Management Relay
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808830A2.CDR
4 SETPOINT PROGRAMMING
489
VOL AGE DEPENDENT OVERLOAD T
GE Power Management
PROTECTION AT 100% V
3 4 5 6
MULTIPLES OF FULL LOAD AMPS
GE Power Management
7 8
808829A2.CDR