Wednesday 17 September 2014

ground - Grounding Neutral Off Grid Solar


Is it recommended to ground the neutral line in an off grid solar system?


A nonisolated inverter would be by definition wired this way, right?


I believe that in home electrical systems neutral is connected to ground in one location. There is a ground bus and a neutral bus and they are linked in one location near the main home supply and the earth connection.


As I understand it when grounding the neutral line,



  • If there is an earth fault on the neutral line nothing happens

  • If there is an earth fault on the live line the inverter circuit breaker will trip. (if no other protection trips first)



If you do not ground the neutral line a GND fault will either ground the neutral line or the live line. I believe the disadvantage being that if the live line is grounded it is confusing for future problems unless there is an indication of the fault.


In a home system is there more danger because of the higher voltage transmission lines?


Would there be a difference if there was or was not a GFDI (Ground Fault Protector)?


REF-1 REF-2




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