Basler DGC-500 - Real-Time Clock

Figure 4-21. Generator Protection Screen, 81 Tab
81U – Pickup. This setting selects the level of frequency that will cause an underfrequency pickup. For
50/60 hertz generator frequency sensing, an 81U Pickup setting of 45 to 65 hertz may be entered. For
400 hertz generator frequency sensing, an 81U Pickup setting of 360 to 440 hertz may be entered.
81U – Time. This setting selects the length of time between when an underfrequency condition is
detected and annunciated. An 81U Time setting of 0 to 30 seconds may be entered.
81U Alarm Configuration. This setting selects how an underfrequency condition is annunciated. An 81U
condition can be configured to trigger a pre-alarm, alarm, or no annunciation.
Inhibit. This setting selects the undervoltage level that will prevent an underfrequency (81U) trip from
occurring. An Inhibit setting of 70 to 576 Vac may be entered.
81O – Pickup. This setting selects the level of frequency that will cause an overfrequency pickup. For
50/60 hertz generator frequency sensing, an 81U Pickup setting of 45 to 65 hertz may be entered. For
400 hertz generator frequency sensing, an 81U Pickup setting of 360 to 440 hertz may be entered.
81O – Time. This setting selects the length of time between when an overfrequency condition is detected
and an overfrequency annunciation (trip) occurs. An 81O
Time setting of 0 to 30 seconds may be entered.
81O Alarm Configuration. This setting selects how an 81O
condition is annunciated. An 81O condition can be
configured to trigger a pre-alarm, alarm or no annunciation.
REAL-TIME CLOCK
The DGC-500 real-time clock settings can be adjusted and
verified through the Set Real Time Clock dialog box (Figure
4-22). Click Configure on the menu bar and click Real
Time Clock.
To set the DGC-500 real-time clock with the PC's time and
date settings, perform the following steps.
1. Click the Display PC Date and Time button. The PC
clock settings are displayed in the date and time fields.
(The date and time fields of the Set Real Time Clock
dialog box cannot be changed manually.)
9355400990 Rev H DGC-500 BESTCOMS Software 4-19