Instruction manual

ACU-1000 Operations Manual
2-8 Interoperability Now
Basic
Chassis
Nominal
Load
Current
Nominal
Nominal Battery Capacity Required
20 Hour
# of
Modules
Amps
AH Rating
Nominal Standby Time Desired
2 Hrs
5 Hrs
10 Hrs
20 Hrs
2
1.26
25
7.2 AH Min@
2.5 A
Discharge
Rate
(STD option)
17 AH Min @
2.5 A
Discharge
Rate
30 AH Min
@ 2.5 A
Discharge
Rate
55 AH Min
@ 2.5 A
Discharge
Rate
3
1.58
32
4
1.9
38
5
2.22
44
6
2.54
51
7
2.86
57
17 AH Min @
4.5 A
Discharge
Rate
33 AH Min @
4.5 A
Discharge
Rate
55 AH Min
@ 4.5 A
Discharge
Rate
100 AH Min
@ 4.5 A
Discharge
Rate
8
3.18
64
9
3.5
70
10
3.82
76
11
4.14
83
12
4.46
89
Figure 2-3 Battery Sizing Chart
To select a properly sized Sealed Lead Acid (SLA) or GEL type battery, determine the number
of modules in the shelf, and select the AH capacity with the specified discharge rate. The
numbers are based on nominal discharge rates and generally available vendor sizes.
Vendors that typically have product available to meet these needs are as follows:
Enersys
Panasonic
Universal Power Group
Yuasa
Please note that, for a battery back-up system intended to provide extended backup time,
external chargers may have to be provided, as the charger built into the ACU-1000 can only
supply 1A for the standard option battery backup. For most of the examples above, this would
amount to a trickle charge and would not be sufficient to effectively charge a discharged
battery.