TP-6805 8/15 35Section 3 Generator Reconnection
3.3 12-Lead (Three-Phase)
Generator Sets
Three-phase, 12-lead generator sets are reconnectable
to the voltages shown on the generator set specification
sheet.
See Figure 3-3 for alternator connections. Some
voltage changes do not require alternator reconnection.
For example, 50 Hz 3-phase voltage configurations of
220/380, 230/400, and 240/415 use the same alternator
connection. Change the system voltage by changing
the voltage setting on the controller. Use Kohlerr
SiteTecht software or the controller menus to change
the voltage setting. See Section 4.7 for instructions.
If alternator reconnection is required, 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. Select desired voltage connection. See
Figure 3-3. Connect the leads according to the
diagram for desired phase and voltage.
5. Reconnect generator set engine starting battery,
negative (--) lead last.
6. Follow the instructions in Section 4.7 to check the
system voltage, frequency, and phase settings,
and change them if necessary.
7. Connect a digital multimeter (DVM) to the
generator set output.
8. Press RUN to start the generator set.
9. Use a voltmeter to check for the correct voltage
output from the generator set. Follow the
instructions in Section 4.8 to calibrate the voltage
on the RDC2 controller, if necessary.
10. Press OFF to stop the generator set.
11. Reconnect utility power to the generator set.
12. Press AUTO to place the generator set in
automatic mode.
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