Winco DGC-2020 - Manual (Page 66)

4-16 DGC-2020 BESTCOMSPlus Software 9400200990 Rev B
If desired, cycle or continuous cranking can be delayed after initiating engine startup. During this delay F ,
the Pre-Start output closes to energize the engine glow plugs or pre-start lubrication pump. The Pre-Start
output can be configured to open upon the conclusion of engine cranking or remain closed as long as the
engine is running
G
.
BESTCOMSPlus engine cranking settings (DGC-2020, System Parameters, Crank Settings) are
illustrated in Figure 4-16.
Figure 4-16. BESTCOMSPlus Engine Cranking Settings
A
Cranking Style: Cycle or Continuous.
B
Number of Crank Cycles: Adjustable from 1 to 7 cycles in 1 cycle increments. Controllers configured for
NFPA compliance have a 1 to 3-cycle range.
C
Cycle Crank Time: Adjustable over the range of 5 to 15 seconds in 1 second increments.
D
Continuous Crank Time: Adjustable from 5 to 60 seconds in 1 second increments. Controllers
configured for NFPA compliance have a 1 to 45 second range.
E
Crank Disconnect Limit: Adjustable from 10 to 100% of nominal engine speed.
F
Pre-Crank Delay: Adjustable from 0 to 30 seconds in 1 second increments.
G
Pre-Start Contact Configuration: “Closed While Running” or “Open After Disconnect”.
Sensing Transformers
Three sets of transformer settings configure the DGC-2020 for operation with a specific system. These
settings, along with the generator voltage, generator current, and bus voltage detected by the DGC-2020,
enable the DGC-2020 to accurately meter system values, offer generator protection, and synchronize the
generator with the bus (style number xxxxxxxAx only).
Generator PT Settings
The generator PT settings establish the nominal primary
A
(generator side) and secondary
B
(DGC-2020
side) voltage levels at the generator voltage-sensing transformer.
Generator CT Setting
The generator CT setting
C
establishes the nominal, primary (generator side) current level at the generator
current sensing transformer. The secondary value of the generator CT is dictated by the style number of
the controller. A DGC-2020 with a style number of 1xxxxxxxx uses a nominal CT secondary rating of 1
Aac. A DGC-2020 with a style number of 5xxxxxxxx uses a nominal CT secondary rating of 5 Aac.
Bus Transformer Settings
Primary and secondary bus transformer ratings are used by the automatic transfer switch function, which
monitors a single-phase bus input to detect mains failure. Controllers equipped with an automatic
synchronizer (style number xxxxxxxAx) also use the primary and secondary bus transformer ratings. The
primary setting
D
establishes the nominal voltage present at phases A and C of the bus. The secondary
setting E establishes the nominal voltage seen at the bus voltage input of the DGC-2020.
BESTCOMSPlus sensing transformer settings (DGC-2020, System Parameters, Sensing Transformers)
are illustrated in Figure 4-17.