Sunny Boy 700
Technical Description
SB700-11:EE
-
14
-
SMA Regelsysteme GmbH
Conditions that cause the Sunny Boy to be disconnected from the grid:
•
Grid Impedance
−
The Sunny Boy does not start to feed to the grid if the grid impedance Z
AC
is higher than 1.25
Ω
.
−
The Sunny Boy is disconnected from the grid within 5 seconds once the
grid impedance increases drastically within a short time (
∆
Z
AC
≥
0.5
Ω
) or
the impedance gets too high (Z
AC
≥
1.75
Ω
).
•
Grid Voltage
−
The grid voltage may be within a range of -15 % and +10 % of the nominal
grid voltage U
N
. Once the grid voltage exceeds this range the Sunny Boy
is disconnected from the grid within 0.2 s.
•
Grid Frequency
−
The grid frequency may be within a range of
±
0.2 Hz of the nominal grid
frequency f
N
while the voltage is within a range of -30 % and +15% of the
nominal grid voltage U
n
- once the frequency goes beyond this range the
Sunny Boy is disconnected from the grid within 0.2 s.
−
Furthermore the Sunny Boy disconnects from the grid within 0.2 seconds
once the grid frequency changes drastically exceeding a certain range.
This new Sunny Boy disconnection concept provides maximum safety with minimum
installation effort due to the fact that the connection of the MSD must only be done to
one single phase
.