21
8.2 Power system set points
In order to optimize the power system operation and set points with the Evolion, use Table 2 as a guideline.
Table 2. Power system set point guide
#
Type
Setting
a.
Single level voltage
56.0 Vdc ± 0.5%
b.
Temperature compensated
voltage control
Disabled or turned OFF.
c.
Maximum re-charge current
See Table 1 (to manage thermal behavior)
d.
Ramp in voltage/current (soft
start)
When the AC powers ON, output voltage/current should ramp up to single level voltage
over at least 1 minute.
e.
Default rectifier output voltage
When AC powers ON, if the rectifier controller is not available or working, make sure to set
the default rectifier output voltage to 46 V maximum.
f.
Low voltage disconnect (if used)
45 Vdc ± 1%
8.3 Re-charge time
The re-charge time needed depends on the %DOD, available charge current and re-charge mode (charge regulated or fast charge). For
the charge regulated mode, a minimum of 24 hours is required for re-charge of the Evolion, from a full discharged state. In charge
regulated mode, the current accepted by the Evolion is approximately 4 Amps.
When in fast charge mode, the re-charge time is a function of the re-charge current available during the constant current phase and
%DOD of the last discharge. See Figure 11.
Figure 11. The re-charge time to reach full state of charge of the Evolion.
Depth of discharge (%)
Time to a full state of charge (h)
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
5
4
3
2
1
0
42 A
32 A
26 A
20 A
Table 1. Maximum re-charge current to manage thermal behavior of Evolion
Cycling Frequency
Maximum allowed Amps per Evolion
(Note 1)
More than 4x per day
16
3x to 4x per day
21
2x to 3x per day
24
1x to 2x per day
32
Less than 1x per day
Less than IMR
Note 1: The re-charge current can never be above IMR to avoid charge regulated mode of operation. Make sure to use the lowest value.
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