Residual current transformer ND 5015 Features . The residual current transformer ND 5015 is designed for DIN rail mounting or screw-type mounting . Mounting on the top-hat rail may be done horizontally or vertically Technical specifications Diameter: 35, 24, 70mm For relay type: RN 5883 Type: ND 5015 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: ND5015/024/61 Art. No.: 0066735