User manual

DKG-307 User Manual V-01.03 (14.02.2006)
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5. MODES OF OPERATION
The modes of operation are selected by pushing the front panel keys. Changing the operation mode
while the genset is running will result to a behavior suitable for the new operating mode. For example, if the
LOAD TEST mode is selected when genset is running at TEST mode, then the genset will take the load.
OFF: In this mode, the mains contactor will be energized if mains phase voltages are within the programmed
limits. The engine will be stopped.
AUTO: It is used for genset and mains automatic transfer. If at least one of the mains phase voltages is
outside limits (P_004/P_005), the mains contactor will be deactivated.
The diesel will be started for programmed times (P_035) after the wait period (P_0026). When the engine
runs, the crank relay will be immediately deactivated. The engine will run without load during engine heating
period (P_029). After this, if alternator phase voltages and frequency are within limits, then the unit will wait for
the generator contactor period (P_032) and the generator contactor will be energized.
When all the mains phase voltages are within the limits, the engine will continue to run for the mains waiting
period (P_030). At the end of this period the generator contactor is deactivated and the mains contactor will be
energized. If a cooling period is given (P_031), the generator will continue to run during cooling period. At the
end of the period, the fuel solenoid will be de-energized and the diesel will stop. The unit will be ready for the
next mains failure.
If the operation of the genset is disabled by the weekly schedule, then the AUTO led will flash, and the
operation of the genset will be as in the OFF mode.
TEST: It is used to test the generator when the mains are on, or keep the generator running in the emergency
backup mode (P_041). The operation of the generator is similar to the AUTO mode, but the mains contactor
will not be deactivated if the mains are not off. If the mains are off, mains contactor will be deactivated and the
generator contactor will be activated. When the mains are on again, a changeover to the mains will be made,
but the engine will be kept running unless another mode is selected. To stop the engine, select AUTO or OFF
mode.
LOAD TEST: It is used to test the genset under load. Once this mode is selected, the engine will run and the
load will be transferred to the genset. The genset will feed the load indefinitely unless another mode is
selected.
6. OTHER FEATURES
6.1 Remote Start Operation
The unit offers the possibility of REMOTE START mode of operation. If the program parameter
P_042 is set to 1 then the unit will enter to the Remote Start operation. The Remote Start signal should be
connected to the SPARE_2 (22) input.
The REMOTE START signal may be a NO or NC contact, switching to either battery positive or
battery negative. These selections are made using programming menu.
In this mode the mains phases are not monitored. If the REMOTE START signal is present then
the mains will be supposed to fail, inversely if the REMOTE START signal is absent, then mains voltages
will be supposed to be present. The front panels mimic diagram’s mains LEDs will reflect the status of the
REMOTE START input.