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2011IEC 62040-3:2011/COR1:2011 Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements; Technical Corrigendum 1
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1970IEC 62040-3:1999/COR1:2003 Corrigendum 1 - Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements
1999IEC 62040-3:1999 Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements