Components and solutions for photovoltaic systems - Weidmüller

Surge protection for photovoltaic systems
Surge protection on the energy supply side
Lines can be charged with high currents and voltages following
a lighting strike. This can lead to permanent damage and loss
of the photovoltaic system. The use of lightning arresters and
surge protection devices results in a higher system availability
Single-phase
Three-phase
TN-S / TT / IT
TN-C
In large-scale systems, the house shown
relates to the inverter housing in the field.
TN-S TT IT
TN-C
External lightning protection
available
then an internal lightning protector is required (Class I)
Can be used with higher
requirements in terms of
availability and
in public facilities
(Lightning protection level (LPL) I + II)
PU I 1+1 LCF 280V/30KA
Page 68
PU I 3+1 LCF 280V/30KA
Page 68
PU I 3 LCF 280V/30KA
Page 69
* leakage current free versions for installation in front of the meter can be found in TK 4.4
60
and better profit. Weidmüller offers a complete range for
protection in accordance with IEC 60364-7-712 for the energy
input for both roof-mounted systems and large-scale systems.
Can be used for
domestic installation
and
standard plants
(Lightning protection level (LPL) III + IV)
PU I 1+1 280V/12,5KA *
Page 65
PU I 3+1 280V/12,5KA *
Page 64
PU I 3 280V/12,5KA *
Page 65
No external lightning protection
available
then an overvoltage protection is sufficient (Class II)
PU II 1+1 280V/40kA
Page 66
PU II 3+1 280V/40kA
Page 66
PU II 3 280V/40KA
Page 67
Ready-made standard solutions
Weidmüller offers an extensive range of pre-wired combiner boxes with surge
protection devices for the AC side in 1- and 3-phase applications.
The complete overview of our standard solutions can be found on pages 52 to 55.