NEN EN IEC 62040-2 : 2006 C1 2011
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The latest, up-to-date edition.
Applies to UPS units intended to be installed as: - a unit or in UPS systems comprising a number of interconnected UPS and associated control/switchgear forming a single power system; - in any operator accessible area or in separated electrical locations, connected to lowvoltage supply networks for either industrial or residential, commercial and light industrial environments.
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