Loading ...
Loading ...
Loading ...
TP-6880 2/2124 Section 2 Generator Set Operation
System Diagnostics
During the unloaded exercise, the controller monitors
the following data. The controller display indicates that
the generator set is running, unless a fault is detected as
described below.
ATS connection. The controller verifies that the
Model RXT ATS interface board is connected.
Battery voltage. Battery voltage is checked before
exercise to verify engine starting capability. Battery
voltage provides a measurement of battery health. If
the controller detects low battery voltage, the
condition is indicated on the display.
Communication integrity tests. J1939, RBUS,
Ethernet, and USB are monitored for messages
indicating that the controller and wiring are reliable.
Engine speed. Engine speed is measured at
reduced speed and full speed. An overspeed or
underspeed condition will result in a fault condition
and shutdown.
Generator output frequency and voltage.
Operating the generator at full speed allows the
RDC2 controller to check the output power for correct
voltage, frequency, and stability. When the engine is
running at full speed, the controller verifies that the
voltage and frequency are within acceptable limits. A
fault message is displayed if the voltage or frequency
is out of range.
Oil pressure. Oil pressure is verified to ensure
proper lubrication of critical engine components.
Pressure is monitored at both reduced and full
speeds. If the oil pressure is low, the Low Oil Pressure
message is displayed and the generator set shuts
down.
2.4.3 Unloaded Full-Speed Exercise
The unloaded full-speed exercise runs the generator set
at full speed for 20 minutes without transferring the load.
To set an unloaded full-speed exercise, follow the
procedure in Figure 3-8 and select Exercise Mode:
Unloaded Full.
2.4.4 Loaded Full-Speed Exercise (with
RXT only)
A loaded exercise starts the generator set, ramps up to
full speed, and then transfers the electrical load from the
utility source to the generator set. After 20 minutes, the
load is transferred back to the utility source. The engine
runs without load for 5 minutes or until cool, and then
shuts down automatically.
Note: With a loaded exercise, power to the building is
lost for up to 10 seconds during load transfer.
For a loaded exercise controlled by the RDC2 controller,
a Model RXT transfer switch must be connected to the
generator set. To set a loaded exercise, follow the
procedure in Figure 3-8 and select Exercise Type:
Loaded.
For a loaded exercise with a transfer switch other than a
Kohler Model RXT, program the exercise at the
transfer switch controller. Refer to the transfer switch
operation manual for instructions.
Loading ...
Loading ...
Loading ...