D-500 MK2 User Manual Firmware V-6.3
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The unit offers 3 ways of transferring the load from genset to mains and vice versa:
-transfer with interruption,
-no break transfer, (from genset to mains)
-soft transfer
This is the most conventional way of transferring the load between the genset and mains. There will be a
power interruption period during the transfer. Note that the program parameters Mains Contactor Timer
and Genset Contactor Timer define the power interruption period.
Transfer from genset (or busbar) to mains:
-The generator (or busbar) contactor releases,
-The unit waits for Mains Contactor Timer
-The mains contactor is energized.
Transfer from mains to genset (or busbar):
-The mains contactor releases,
-The unit waits for Generator Contactor Timer
-The generator (or busbar) contactor is energized.
If this transfer method is used, it is advised to make an electrical
interlock between the two contactors to prevent an accidental
phase to phase short circuit.
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