IEC 62040-1-2 Ed. 1.0 b:2004, Uninterruptible power systems (UPS) - Part 1-2: General and safety requirements for UPS used in restricted access locations

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IEC 62040-1-2 Ed. 1.0 b:2004, Uninterruptible power systems (UPS) - Part 1-2: General and safety requirements for UPS used in restricted access locations