Datakom D-500 MK3 - Page 166

D-500 MK3 User Manual Firmware V-14.2
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Step_A:
The genset is at rest.
The load consumes power from the battery bank.
The battery bank voltage decreases slowly with discharge level.
When the battery bank voltage falls below the start to charge voltage, after the charge voltage threshold
timer, the controller detects that the battery bank is discharged and decides to run the genset.
Step_B:
The engine is started, the genset output voltage increases with rpm increase.
The controller adjusts the rpm in order to match exactly the battery bank voltage.
When voltage matching is reached, the load contactor is closed. Thus load switching is performed with zero
current. This provides longer contactor life.
Step_C:
The controller increases the rpm slowly until reaching the maximum charging current.
Step_D:
The rpm is controlled in order to keep the charging current constant at its maximum set value.
The battery bank voltage increases slowly until reaching the nominal charge voltage.
Step_E:
The rpm is controlled in order to keep the battery bank voltage at the nominal charging voltage.
The charge current decreases slowly.
Step_F:
When the charge current falls below the boost start current, the controller starts the optional boost charge
cycle.
Step_G: The maximum charging current is maintained until the battery voltage reaches the nominal boost
voltage.
The controller increases the rpm slowly until reaching the maximum charging current.
The battery bank voltage increases slightly with charge percentage.
Step_H:
The rpm is controlled in order to keep the battery bank voltage at nominal boost voltage.
The charge current decreases slowly.
Step_J:
When the charge current falls below the stop current percent, the controller decreases the rpm until charge
current becomes zero, then opens the load contactor and decreases the rpm until idle speed.
Step_K:
The idle speed is kept constant until the end of cooldown period.
Step_L:
The engine comes to rest.
The load consumes power from the battery bank.
The battery bank voltage decreases slowly with discharge level.
The controller will wait until the battery bank voltage falls below the start to charge voltage.