GE Multilin 489 Instruction Manual page 189
Generator management relay
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Also See for Multilin 489:
- Instruction manual (306 pages) ,
- Communications manual (78 pages) ,
- Instruction manual (38 pages)
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CHAPTER 5: SETPOINTS
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
GE Multilin
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FIGURE 5–17: Thermal Limits for High Inertial Load
To illustrate the Voltage Dependent Overload Curve feature, the thermal limits shown in
Thermal Limits for High Inertial Load on page 5–79 will be used.
Construct a custom curve for the running overload thermal limit.
If the curve does not extend to the acceleration thermal limits, extend it
such that the curve intersects the acceleration thermal limit curves. (see
the custom curve below).
THERMAL LIMITS
FOR HIGH INERTIAL LOAD
1- Running Overload Thermal Limit
1
2- Acceleration Thermal Limit @ 80%V
3- Acceleration Thermal Limit @ 100%V
4- Locked Rotor Thermal Limit
- Machine Acceleration Curve @ 80% V
6- Machine Acceleration Curve @ 100%V
2
3
4
5
6
MULTIPLES OF FULL LOAD AMPS
489
808826A3.CDR
5–79
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