10 External Energy Sources in the Off-Grid System SMA Solar Technology AG
136 SI80H-60H-OffGrid-IA-en-11 Installation Manual
10.9.2 Operating Procedure for Generators without an Autostart
Function
Event or state Result Internal transfer
relay
The generator
management requests the
generator.
The off-grid inverter controls a signal generator.
The signal generator indicates when you should
start the generator.
Open, the
stand-alone grid is
not connected to
the generator.
You start the generator
(e.g. with a cable pull).
The generator starts.
The generator voltage builds up.
You close the switch-
disconnector between the
generator and the off-grid
inverter.
The generator is connected to the off-grid
inverter.
The generator voltage is
within the configured
limiting values for voltage
and frequency.
The generator management starts the warm-up
time.
The warm-up time is
running.
‒
The warm-up time ends. The off-grid inverter synchronises the stand-alone
grid to the generator voltage.
The stand-alone grid is
synchronised.
The off-grid inverter connects the stand-alone
grid to the generator.
Closed, the
stand-alone grid is
connected to the
generator.
The generator is connected. The generator is feeding current into the stand-
alone grid.
The generator management starts the minimum
run time.
The minimum run time is
running.
Even if generator management no longer
requests the generator, the generator remains
connected to the stand-alone grid.
The minimum run time ends. ‒
The generator
management no longer
requests the generator.
The off-grid inverter no longer controls the signal
generator. The signal generator indicates that
you should disconnect the generator from the off-
grid inverter.
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