Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements (IEC 62040-3:2021); German version EN IEC 62040-3:2021
Draft Document - Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements (IEC 22H/228/CD:2017); Text in German and English
Reciprocating internal combustion engines; generating sets with reciprocating internal combustion engines; small power generating sets; requirements and tests
Reciprocating internal combustion engine driven alternating current generating sets - Part 11: Rotary uninterruptible power systems - Performance requirements and test methods (IEC 88528-11:2004); German version EN 88528-11:2004