Installation Guide

TP-6879 3/15 21Section 1 Installation
1.10 ATS and Accessory
Connections
Hazardous voltage.
Backfeed to the utility system can
cause property damage, severe
injury, or death.
If the generator set is used for
standby power, install an automatic
transfer switch to prevent inadvertent
interconnection of standby and
normal sources of supply.
WARNING
The following sections cover electrical connections of
the automatic transfer switches and RBUS accessories,
including the programmable interface module (PIM), the
load control module (LCM), or the load shed kit.
1.10.1 Transfer Switch Connection
Connect the ATS or remote start/stop switch. Connect
the load leads from the generator set to the Emergency
source lugs on the ATS. Route low-voltage
communication leads through separate conduit from the
AC power and load leads. All connections must comply
with applicable state and local codes.
Note: Do not use the Kohlerr Model RRT transfer
switch with the RESV or RESVL generator set.
Communication connections for a Kohlerr
Model RXT transfer switch
One Model RXT transfer switch can be connected to the
generator set. See Figure 1-19. Use shielded,
twisted-pair communication cable to connect P10-1
through P10-4 on the transfer switch interface module to
the generator set terminal block connections A, B, PWR,
and COM.
Note: Connections 3 and 4 on the generator set are not
used with the Model RXT transfer switch.
1. Generator set terminal block TB3. See Figure 3-4 for location. Check the decal on the generator set for terminal block connections.
2. Connect one end of each c able shield to GROUND at the generator set.
3. Communication cable Belden #9402 or equivalent 20 AWG shielded, twisted-pair cable. Section 1.10.2
4. Leave one end of each cable s hield disconnected. If accessory modules (PIM, LCM, or load shed kit) are connected, see Section
1.10.3.
Interface Board on the
Model RXT Transfer Switch
Note: Generator set terminal block (TB3) connections 3 and 4 are NOT USED with the Model RXT ATS.
Generator Set
COM
PWR
B
A
RXT
COM
PWR
B
A
GND
TB3
RBUS
12 VDC
3
1
2
4
4
A
B
COM
PWR
3
4
Figure 1-19 Model RXT Transfer Switch Communication Connection to Generator Set Terminal Block