Winco DGC-2020 - Manual (Page 76)

4-26 DGC-2020 BESTCOMSPlus Software 9400200990 Rev B
Figure 4-24. BESTCOMSPlus Voltage Protection Settings
A
Undervoltage Pickup: Adjustable from 70 to 576 Vac in 1 Vac increments.
B
Undervoltage Activation Delay: Adjustable from 0 to 30 s in 0.1 s increments.
C Undervoltage Alarm Configuration: None, Alarm, or Prealarm.
D Undervoltage Inhibit Frequency: Adjustable from 20 to 400 Hz in 1 Hz increments.
E Undervoltage Low Line Scale Factor: Adjustable from 0 to 3.000 in increments of 0.001.
F
Overvoltage Pickup: Adjustable from 70 to 576 Vac in 1 Vac increments.
G
Overvoltage Activation Delay: Adjustable from 0 to 30 s in 0.1 s increments.
H
Overvoltage Alarm Configuration: None, Alarm, or Prealarm.
I
Overvoltage Low Line Scale Factor: Adjustable from 0 to 3.000 in increments of 0.001.
J
Phase Imbalance Pickup: Adjustable from 5 to 100 Vac in 1 Vac increments.
K
Phase Imbalance Activation Delay: Adjustable from 0 to 30 s in 0.1 s increments.
L
Phase Imbalance Alarm Configuration: None, Alarm, or Prealarm.
Frequency Protection
Two sets of frequency protection settings are provided: one for underfrequency (81U) and one for
overfrequency (81O).
Underfrequency
An underfrequency condition is annunciated when the generator frequency decreases below the 81U
pickup setting
A
for the duration of the 81U activation delay setting
B
. An underfrequency annunciation can
be user-selected to trigger a pre-alarm
C
(warning) or alarm
C
(shutdown). An underfrequency annunciation
can also be user-configured to close a programmable output.
A voltage-based inhibit setting
D
prevents an 81U trip from occurring during an underfrequency condition
associated with system startup.
Overfrequency
When the generator frequency increases above the 81O pickup setting
E
for the duration of the 81O
activation delay setting F , an overfrequency condition is annunciated. An overfrequency annunciation can
be user-selected to trigger a pre-alarm G (warning) or alarm (shutdown). An overfrequency condition can
also be user configured to close a programmable output.