Transitioning
from backup
power mode to
feeding energy
into the grid
1.
The inverter is operating in backup power mode. Contactor K1 to the public
grid is open.
2.
Public grid available again.
3.
The Fronius Smart Meter monitors the grid parameters on the public grid
and passes this information to the inverter.
4.
The stability of the returned public grid is determined by checking the meas-
ured values of the Fronius Smart Meter.
5.
The inverter ends backup power mode and disconnects the outputs.
6.
The inverter deactivates K3. Power is restored to contactors K1, K4 and K5.
7.
All circuits are reconnected to the public grid and are supplied by the grid.
The inverter does not feed anything into the grid at this time.
8.
The inverter can start feeding energy into the grid again after performing the
grid checks required by the relevant standard.
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