69
EN
Operating the PV inverter
At any time, while you are viewing one of the 4 grid setting windows, you are able to switch off the
power disconnection device by simultaneously pressing the up and down buttons and holding for
more than 5 seconds.
See the tables below for the LVD/MVD allowed parameter ranges according to the regulations:
When the selected grid is LVD, the following adjustable vaules are allowed:
Parameter
name in display
adjustable values
Rise-in-voltage protection U>
Umax
110 ... 115%
As defined in VDE AR N 4105, only the rise-in-voltage protection Umax shall be designed as
10-minute running mean value protection which prevents the upper voltage limit specified in DIN
EN 50160 from being exceeded (monitoring over the power).
When the selected grid is MVD (BDEW), the following adjustable values are allowed:
Parameter
name in
display
adjustable
values
recommended settings of
protection relays as per
BDEW
Rise-in-voltage protection U>> Crit. Umax
1.00 ... 1.30 U
n
1.20 U
ns
≤ 100 ms
Under-voltage protection U<
Umin
0.10 ... 1.00 U
n
0.80 U
ns
1.5 - 2.4 s
Under-voltage protection U<<
Crit. Umin
0.10 ... 1.00 U
n
0.45 U
ns
300 ms
Rise-in-frequency protection f> Fmax
50.0 ... 52.0 Hz
51.5 Hz
≤ 100 ms
Under-frequency protection f< Fmin
47.5 ... 50 Hz
47.5 Hz
≤ 100 ms
Delay time for U<
tUmin
1.5 ... 2.4 s
1.5 ... 2.4 s
Table 7.1.: Recommended settings of protection equipment as per BDEW Technical Guidelines -
June 2008 issue from Table 3.2.3.3 - 2
7.1.2 SPI device
The SPI is a system interface protection device for use in Italy. There is no internal SPI required
for this inverter but an external SPI device may be requested. Care must be taken so disconnec-
tion settings on the inverter are set so they do not interfer with external SPI device disconnection
settings. The password “5555” entered in the Install Settings page when Italy is selected as the
Country, enables disconnection parameters to be adjusted directly within the grid settings menu.
