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Zoeken van fouten SMA Solar Technology AG
56 SB12-17-IA-nl-52 Installatiehandleiding
9.3.1 PV-generator op aardlek controleren
1. De omvormer AC- en DC-zijdig loskoppelen zoals beschreven in hoofdstuk 7.2”Omvormer
openen” (Pagina44).
2. Spanning tussen de pluspool van alle strings en het
aardpotentiaal (PE) meten.
3. Spanning tussen de minpool van alle strings en het
aardpotentiaal (PE) meten.
4. Spanning tussen de plus- en minpool van alle
strings meten.
Als de gemeten spanningen stabiel zijn en de som van de spanningen van de pluspool ten
opzichte van het aardpotentiaal en de minpool ten opzichte van het aardpotentiaal van een
string bijna gelijk is aan de spanning tussen de plus- en minpool, dan is er sprake van een
aardlek.
GEVAAR!
Levensgevaar door elektrische schok!
Kabels van de PV-generator alleen aan de isolatie vastpakken.
Geen strings met aardlek op de omvormer aansluiten.
OPGELET!
Onherstelbare beschadiging van het meettoestel door te hoge spanningen!
Uitsluitend meettoestellen met een DC-ingangsspanningsbereik tot minimaal 1000V
gebruiken.
56


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