Installation Guide

TP-7091 2/2142 Section 5 Accessories
For detailed installation and connection instructions,
see the installation instructions provided with the load
shed kit or the Operation/Installation Manual for the
Model RXT transfer switch.
1. Terminal block TB10
2. Load control circuit board
3. Mounting bracket
Note: Kit includes current transformer (CT), not shown.
2
GM88281
1
3
Figure 5-9 Load Shed Assembly GM88281-1
(mounts inside the transfer switch
enclosure)
5.5.1 Power Relay Module
The power relay module kit contains one 50 amp
normally closed relay with connecting lugs in a NEMA
type 3R enclosure. Connect up to four (4) power relay
modules to the load management devices listed above.
The power relay modules can be mounted indoors or
outdoors. Two (2) 120 VAC loads (shed simultaneously)
or a single 240 VAC load can be wired to each relay.
For detailed installation and connection instructions,
see the installation instructions provided with the power
relay module kit.
Figure 5-10 Power Relay Module
5.6 PowerSync Automatic
Paralleling Module (APM)
The PowerSync Automatic Paralleling Module (APM)
allows the use of two Model 14RCA or two 20RCA
generator sets in a single-phase paralleling system to
supply power to one building or site. See Figure 5-11.
The APM provides a common connection point for
paralleling generators and permits individual control of
the generator connections, allowing for
synchronization, redundancy, and generator
management.
Generator management provides these features and
benefits:
 Generator management runs one generator set
when power requirements are low, and automatically
starts, synchronizes, and connects the second
generator set when the load increases.
 Longer generator life: Smart generator management
automatically operates the generator with the lowest
operating hours first, splitting the run time evenly
between the two generator sets and extending the life
of both units.
 Redundancy: If one generator set requires service or
even fails, the other generator set is still available to
provide power to your critical electronics.
 Dual fuels: Allows operation of one generator set on
natural gas and the other on LPG, if desired.
 Simultaneous exercise: Setting the exercise time
and date on one generator set schedules both
generator sets to exercise at the same time.
 Power during generator service: Customer override
allows maintenance or service to one generator set
while the other continues to run.
The following combinations of single-phase
generator sets can be paralleled:
 Two single-phase model 14RCA generator sets with
the 120/240 volt single-phase configuration
 Two single-phase model 20RCA generator sets with
the 120/240 volt single-phase configuration