Spark-gap-based type 1 N-PE lightning current arresters of type DEHNgap are installed in “3+1” or “1+1“ circuits of TT or TN systems between neutral conductor N and protective conductor PE.
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Spark-gap-based type 1 N-PE lightning current arresters of type DEHNgap are installed in “3+1” or “1+1“ circuits of TT or TN systems between neutral conductor N and protective conductor PE.