S
ection
5
Figure 5-10. Setting Adjustments Screen, Startup Tab
Startup Control - Gen Soft Start Time (sec). This setting denes the time limit for the generator soft-start voltage
offset. The soft-start time can be set from 1 to 120 seconds in 1 second increments.
Underfrequency Setting - Corner Frequency (Hz). The Corner Frequency setting denes the value of frequency
that causes the DVR2000E to adjust the voltage setpoint so that the generator voltage follows the selected volts
per hertz slope. A value of 40 to 65 hertz can be entered in this setting eld in 0.01 increments.
Underfrequency Setting - Slope (Volts/Hz). The slope for generator underfrequency protection is selected with this
setting. A slope setting of 1 to 3.00 can be entered in increments of 0.01. The slope is a per-unit setting.
Engine Unloading Tab
The Engine Unloading tab settings of the Setting Adjustments screen are shown in Figure 5-11. Each setting of
the Engine Unloading tab is described in the following paragraphs.
Unloading Activation – Frequency (Hz). This frequency is entered as a value below the underfrequency corner
where the engine unloading feature may be activated. A frequency value of 0.9 to 9.0 hertz can be entered in 0.1
hertz increments.
Unloading Activation – Rate (Hz/25 msec). The engine unloading feature is activated when the frequency rate of
change exceeds the setting of this eld. An unloading activation rate of 0 to 25.5 hertz per 25 milliseconds can be
entered in 0.1 hertz per 25 millisecond increments.
Unloading Droop – Percentage (%). The value in this eld denes the percent drop in generator output voltage for
each 1.5 percent decrease in generator frequency when operating in the Engine Unloading mode. The Unloading
Droop Percentage is adjustable from 1 to 20 percent in 1 percent steps.
Unloading Droop – Time (sec). This value denes the length of time that the Engine Unloading mode may be
active before control is passed to the normal Underfrequency mode of operation. Droop time is adjustable from 1
to 5 seconds in 1 second increments.
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5
Section 5 Index
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