Basler Electric DGC-2020 - Manual (Page 169)

(when the DGC-2020 is operating in Run or Auto mode with the ATS closed) can also be configured to
trigger a pre-alarm or alarm. The speed sender fail
E alarm is always enabled. A user-adjustable time delay
is provided for each sender/sensing alarm/pre-alarm.
Alarm and pre-alarm annunciations for loss of engine speed signals is not user-programmable and
operates as follows. If the MPU (magnetic pickup) or generator frequency is programmed as the sole
engine speed source and that signal source fails, an alarm (and shutdown) is triggered. If the engine
speed source is configured as MPU and generator frequency and a loss of one of the signal sources
occurs, a pre-alarm is annunciated. An alarm (and shutdown) is triggered if both speed signals are lost.
The BESTCOMSPlus Sender Fail screen is illustrated in Figure 4-50.
Figure 4-50. Sender Fail
A Coolant Temp Sender Fail: None, Alarm, or Pre-Alarm, time delay adjustable from 5 to 30 min in 1 min
increments.
B Oil Pressure Sender Fail: None, Alarm or Pre-Alarm, time delay adjustable from 0 to 300 s in 1 s
increments.
C Fuel Level Sender Fail: None, Alarm, or Pre-Alarm, time delay adjustable from 0 to 300 s in 1 s
increments.
D Voltage Sensing Fail: None, Alarm, or Pre-Alarm, time delay adjustable from 0 to 300 s in 1 s
increments.
E Speed Sender Fail: Time delay adjustable from 0 to 300 s in 1 s increments.
Generator Protection
Two tiers of generator protection are offered. DGC-2020 controllers with style number xxxxxxSxx offer
standard protection consisting of undervoltage (27), overvoltage (59), overfrequency (81O),
underfrequency (81U), reverse power (32R), and loss of excitation (40) elements. Controllers with style
number xxxxxxExx offer enhanced protection, which consists of the standard protection elements Plus
phase-sequence voltage (47), time overcurrent (51), vector shift (78), and ROCOF (81) elements.
The description of generator protection is organized as follows:
•
Voltage (27, 59, 47)
•
Frequency (81)
•
Reverse Power (32R)
•
Loss of Excitation (40Q)
•
Overcurrent (51)
•
Loss of MAINS Protection (78 Vector Shift and 81 ROCOF)
Voltage Protection (27, 59, 47)
Voltage protection consists of two undervoltage elements, two overvoltage elements, and one phase-
sequence voltage element (style number xxxxxxExx only).
9400200990 Rev X DGC-2020 BESTCOMSPlus
® Software
4-59