Automatic Transfer Switch Connection - Kohler 48RCLC Installation Manual

2.7 Automatic Transfer Switch Connection

WARNING
A typical standby system has an automatic transfer switch connected to the generator set output to automatically transfer the
electrical load to the generator set if the normal source fails. The normal power source is typically utility power. When normal
power returns, the switch transfers the load back to the normal power source and then signals the generator set to stop.
Connect the ATS or remote start/stop switch. Connect the load leads from the generator set to the emergency source lugs on
the ATS. Connect the RBUS or engine start connections as described below. 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.
Kohler Model RXT Automatic Transfer Switch
The RDC2 controller is designed to control the Kohler Model RXT transfer switch as well as the generator set.
Follow the installation instructions to connect the transfer switch interface board to the appropriate terminals on the generator
set. The RDC2 controller uses a Kohler-proprietary communication protocol to communicate with the transfer switch.
When connected to a Kohler Model RXT transfer switch, the RDC2 controller provides the following features:
•
Monitors and displays utility voltage and frequency.
•
Schedule loaded exercises from the RDC2 generator set controller.
•
Set the ATS system voltage and frequency.
•
Allows calibration of the utility voltage and frequency at the generator set controller.
•
Allows adjustment of transfer switch transfer time delays from the generator set controller.
TP-7203 4/23
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.
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