在TN-S/TT系统中建立3+1电路时需要下列产品： 230/415 V AC: 3 x 2801615 (FLT-SEC-H-T1-1C-264/25-FM) + 1 x 2905472 (FLT-SEC-P-T1-N/PE-350/100-FM) + 1 x 2910501 FLT-SEC-H MPB-3+1 400/690 V AC: 3 x 2907259 (FLT-SEC-H-T1-1C-440/25-FM) + 1 x 2907262 (FLT-SEC-P-T1-N/PE-440/100-FM) + 1 x 2910501 FLT-SEC-H MPB-3+1
