Application Considerations - Generac Power Systems RXUW200A3 Owner's Manual

See Figure 2-2. The SACM has a test button (C) used to
simulate an overload condition. This button operates
even when the transfer signal is inactive. The Generator
Control Wiring is connected to terminals (D).
1
2
1
2
1
A 2
1
2
T1
N1
D
N2
0 DC GROUND
194 +12 VDC
T1
23 TRANSFER
N2
Figure 2-2. Smart A/C Module (SACM)
Automatic Transfer Switch Owner's Manual
C
B
®
®
N1 T1

Application Considerations

Generator overload condition is determined by generator
frequency. Loads are shed when frequency is less than
58 Hz for three seconds or less than 50 Hz for ½ second
(for 60 Hz systems).
The SACM can be used in conjunction with individual
SMMs to manage a combined total of eight loads.
• Use Priorities A/C 1-4 on the SACM as the top
priorities, then up to four SMMs as Priorities 5-8.
• Use only select A/C priorities on the SACM as the top
priorities, then use additional SMMs as the remaining
priorities.
• A SMM can share a priority with an A/C priority on
the SACM provided the generator is sized to handle
the combined surge load from both appliances.
Sharing priorities can allow up to 12 loads to be
managed in a properly sized system.
In any combination of modules, the recovery times after a
loss of utility power or shutdown due to overload are
shown in Table 1
Table 1. Priority Settings
Priority Recovery Time
1
006783
2 5 minutes 15 seconds
3 5 minutes 30 seconds
4 5 minutes 45 seconds
5
6 6 minutes 15 seconds
7 6 minutes 30 seconds
8 6 minutes 45 seconds
See the SMM Owner's/Installation Manual for detailed
characteristics and specifications of that product.
General Information
.
SACM
5 minutes Yes
Yes
Yes
Yes
6 minutes NA
NA
NA
NA
SSMM
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
7