SMA WB 5000 Installation - Manual (Page 24)

Installation requirements SMA Technology AG
Page 24 WB50_60-11:SE4005 Installation Guide
Mains supply impedance
A high mains supply impedance can lead to a high AC voltage at the terminal of the
Windy Boy 5000 / 6000. The output voltage (Uac) of the Windy Boy 5000 / 6000
ist limited to 260 V according to E DIN VDE 0126 4/99. If the Windy Boy 5000 /
6000 records that this voltage limit has been reached, it switches off immediately and
displays a grid error message.
The following diagram shows the power output the inverter can feed into the grid per
phase without leading to a switch-off because of a too high AC voltage.
The following variables are needed to get an estimate of it.
• Grid voltage without mains supply
• Mains supply impedance at the terminal of the Windy Boy 5000 / 6000
The diagram shows the respective curves for an AC voltage without mains supply. A
maximum possible feed-in power per phase (X axis) is obtained for the respective
curves depending on the mains supply impedance (Y axis).
• The grid voltage without mains supply is 230 V.
• The mains supply impedance at the terminal is 1.2 Ohms.
Mains supply impedance [Ohm]
Output [kW] per phase
0 5 10 15 20 25 30
0,5
0,6
0,7
0,8
0,9
1,0
1,1
1,2
1,3
1,4
1,5
250 V 240 V 230 V 220 V 210 V 200 V