12-Lead (Three-Phase) Generator Sets - Kohler 48RCLC Installation Manual

7.3 12-Lead (Three-Phase) Generator Sets

Three-phase, 12-lead generator sets are reconnectable to the voltages and phases shown on the generator set specification
sheet. See Figure 39 and Figure 40 for the applicable three-phase configurations and single-phase dogleg configuration. Use
the following procedure to reconnect the generator to the desired voltage configuration, change the system voltage setting, and
adjust the output voltage.
Note:
Equipment damage. Verify that the voltage ratings of the transfer switch, line circuit breakers, and other accessories match the
selected line voltage.
Reconnection Procedure
1. Press the OFF button on the RDC2 controller.
2. Disconnect engine starting battery, negative (-) lead first.
3. Disconnect utility power to the generator set.
4. Verify that the line circuit breaker is sized correctly for the new voltage and amperage. Replace the circuit breaker if
necessary.
5. Select desired voltage connection. See Figure 39 and Figure 40. Connect the leads according to the diagram for desired
phase and voltage.
6. Reconnect generator set engine starting battery, negative (-) lead last.
7. Follow the instructions in the Changing System Settings section to enter the RDC2 Genset System menu. Check the
system voltage, frequency, and phase settings, and change them if necessary.
8. Connect a digital multimeter (DVM) to the generator set output.
9. Press RUN to start the generator set.
10. Use a voltmeter to check for the correct voltage output from the generator set. Follow the instructions in the Voltage
Calibration section to calibrate the voltage on the RDC2 controller, if necessary.
11. Press OFF to stop the generator set.
12. Reconnect utility power to the generator set.
13. Press AUTO to place the generator set in automatic mode.
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