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889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SYSTEM
CHAPTER 4: SETPOINTS
Generator
Setup
Generator system setup allows the user to enter generator rated values from the
nameplate (provided by the generator manufacturer). These generator rated values are
used to derive settings for protection and control functions within this device as well as to
calculate other rated quantities.
Rated Full Load Current of the generator
Rated MW (Active power) of the generator
Rated MVAR (Reactive power) of the generator (obtained by arc/inverse cosine function of
rated power factor, and then its sine function)
Path
:
Setpoints > System > Generator
RATED MVA
Range: 0.001 to 2000.000 MVA in steps of 0.001 MVA
Default: 50.000 MVA
Enter the generator rated power rating in MVA. Typically this value is obtained from the
generator nameplate or design datasheet. The rated MVA of the generator is used to
derive other rated values such as rated MW, MVAR, etc.
RATED POWER FACTOR
Range: 0.00 to 0.99 pf in steps of 0.01 pf
Default: 0.85 pf
Enter the generator rated power factor (lagging) value. This value is used to derive other
rated values such as rated MW, MVAR, etc.
RATED VOLTAGE PHASE-PHASE
Range: 0.0 to 30000.0 in steps of 0.1V
Default: 13800.0 V
Enter the generator rated phase-to-phase (or line-to-line) voltage in Volts.
AVERAGE CALC. PERIOD
Range: 1 to 90 min in steps of 1 min
Default: 15 min
This setting adjusts the period of time over which average values for generator records
are calculated, such as the generator average load.
