DIN 43857-4:1974-12 Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current; principal dimensions for meter terminal cover for poly-phase meters
1974DIN 43857-4:1974-12 Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current; principal dimensions for meter terminal cover for poly-phase meters
1974DIN 43857-4:1974 Watthour meters in moulded insulation case without instrument transformers, up to 60 A rated maximum current; principal dimensions for meter terminal cover for poly-phase meters