DIN VDE 0100-534

Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment - Isolation, switching and control - Clause 534: Devices for protection against overvoltages (IEC 60364-5-53:2001/A1:2002 (Clause 534), modified); German implementation HD 60364-5-534:2008

standard by DIN Electrotechnical Standard , 02/01/2009