Mutual induction between cable and string PV

[Sempronio1960bis]

An atmospheric discharge induces an overvoltage in the U cable, which in turn induces an overvoltage in the loop constituted by the string below and its connections to the inverter. There have been several breakdowns. There are SPDs, DC and AC.
The U cable is all resting on the string. The owner of the PV believes that the faults are due to the overvoltages induced on the cable and from this to the loop of the string. I think they are due either to the connections of the SPDs, which however have always remained intact. What does you think?

PS sorry about tranlation, it is from Google

 

[7anoter4]

I am not specialist in lightning protection of electronic devices .My domain is Power Station and High voltage substation.
I prefer the USA standards as NFPA 780. However, IEC 62305 Protection against Lightning Part 4 electric and electronic systems within structures chapter 6 Magnetic shield and line routing may be useful in this case.

 

[7anoter4]

These 2 publications may be interesting also-in my opinion.
IEEE Guide for Surge Protection of Equipment Connected to AC Power and Communication Circuits
Dehn- Lighning Protection Guide chapter 7 Protection of electrical and electronic systems against LEMP

 

[Sempronio1960bis]

Thank you very much!

 

[FacEngrPE]

Reeve Observatoryposts this paper in the subject of protecting antenna and antenna connected equipment from static discharges.

Antenna System Bonding and Grounding Requirements in the USA Whitham D. Reeve (© 2012 W. Reeve) (attached).

In addition to NFPA 780, please also consider NFPA 70 NEC Article 810.

 

[Sempronio1960bis]

Thank you very much!