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BETA Protecting
Overvoltage Protection Devices
Configuration
6/26
Siemens ET B1 · 10/2008
6
*
You can order this quantity or a multiple thereof.
Surge arresters, type 3
Surge arresters, type photovoltaic
5
SD7 432-. for TN-S/TT systems
5
SD7 434-. for TN-S/TT systems
Due to the combination of three power varistors, the overvoltage
protection required for the inverters is implemented on the DC
side.
On the AC side, the overvoltage protection can be ensured
using surge arresters type 2 (5SD7 422-. or 5SD7 424-.).
5
SD7 483-.
F1
I2_13802a
135
246
L1
N
PE
L1
N
PE
IN
OUT
8 10
4 6
12
7 9
1 3 5
8 10
2 4 6
11 12
I2_13803a
L1
L2
L3
N
PE
F1
L1
L2
L3
N
PE
IN
OUT
I2_13949
L+ PE L-
PE L N
L+
L-
L
N
PE
L
N
PE
Switch
Converter
Photovoltaic
generator
© Siemens AG 2008