DIN VDE 0641-21 (VDE 0641-21) applies to selective main circuit-breakers (SMCBs) for operation at 50/60 Hz, having a rated voltage not exceeding 440 V (between phases), a rated current not exceeding 125 A and a rated short-circuit capacity not exceeding 50 000 A.
Leitfaden zur Planung von Niederspannungsnetzen • Theorie, Normen und Praxis unter Berücksichtigung der DIN VDE 0100 und DIN EN 60909-0 (VDE 0102) VDE-Schriftenreihe – Normen verständlich, Band 159
2019, 175 pages, Din A5, Broschur
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