O Bus Stability Underfrequency Pickup and Dropout: Adjustable from 46 to 64 Hz in 0.05 Hz increments.P Bus Stable Activation Delay: Adjustable from 0.1 to 600 s in 0.1 s increments.Generator Governor ControlBESTCOMSPlus Navigation Path: Settings Explorer, Synchronizer/Voltage Matching, Governor BiasControl SettingsHMI Navigation Path: Settings, Sync/Voltage Matching, Governor Bias Control SettingsDuring synchronization, the DECS-250 adjusts the generator voltage and frequency by issuing speedcorrection signals to the speed governor. Correction signals are issued in the form of DECS-250 outputcontact closures. These correction signals may be either continuous or proportionalA. When proportionalcorrection is selected, the correction pulses are of varying widthsB and intervalsC. Initially, long pulses areissued when the frequency difference between the generator and bus is large. As the correction pulsestake effect and the frequency difference becomes smaller, the correction pulse widths are proportionallydecreased.Governor bias control settings are illustrated in Figure 14.Figure 14. Generator Governor Control SettingsABias Control Contact Type: Select Continuous Pulse or Proportional Pulse.BCorrection Pulse Width: Adjustable from 0 to 99.9 s in 0.1 s increments.CCorrection Pulse Interval: Adjustable from 0 to 99.9 s in 0.1 s increments.CALL US TODAY1-888-POWER-58REQUEST A QUOTEparts@genpowerusa.comSHOP ONLINEwww.genpowerusa.comCALL US TODAY1-888-POWER-58REQUEST A QUOTEparts@genpowerusa.comSHOP ONLINEwww.genpowerusa.com
