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IEC 62848-2 Ed. 1.0 en:2019 Railway applications - DC surge arresters and voltage limiting devices - Part 2: Voltage limiting devices
standard by International Electrotechnical Commission, 06/18/2019
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IEC 62848-2:2019 applies to Voltage Limiting Devices (VLDs) to be applied in DC traction systems in order to comply with protective provisions against electric shock from DC, and combined AC ? DC voltages, in accordance with the IEC 62128 series, taking into account stray current provisions.VLDs operate in such a way as to connect the track return circuit of DC railway systems to the earthing system or to conductive parts within the overhead contact line zone or current collector zone.