International Telecommunication Union   ITU
عربي  |  中文  |  Espa˝ol  |  Franšais  |  Русский
 Advanced Search Advanced Search Site Map Contact us Print Version
Home : ITU-T Home : ITU-T and Climate Change
An Energy-aware Survey on ICT Device Power Supplies

This document has been commissioned by the International Telecommunication Union (ITU) and the Global

e-Sustainability Initiative (GeSI). Specifically, this document reports the results of a wide analysis performed on a large set of commercially available external power supplies (more than 300 devices verified and more than 200 electrically measured) to assist the standardization activities within ITU-T Study Group 5 (SG5) (Recommendation ITU-T L.1000, phase 2). Mechanical, electrical and environmental characteristics have been evaluated; correlation and statistics have also been developed.

The report is organized in two main parts. The first part (Sections 2 and 3) considers nameplate (e.g., voltage, current, efficiency class, etc.) and physical characteristics (e.g., weight, volumes, mains and DC voltage connector type). The second part (Sections 4 and 5) of the report shows the measured electrical features of the adapters, in terms of energy efficiency, DC voltage and Cos φ, with variable loads, together with no load measurements.

This report was researched and written by Raffaele Bolla, Roberto Bruschi and Luca D’Agostino (University of Genoa, Italy).

Press Release

(September 2012)
Download report here.
Download executive summary here.
Useful links:
ITU-T Publications on ICTs, the Environment and Climate Change Global Portal on ICTs, the Environment and Climate Change

This website provides references to external resources: background papers, reports, case studies and statistics on ICTs and the environment including information on climate change, conflict minerals, e-waste and other sustainability issues.

Click here.


Top - Feedback - Contact Us -  Copyright ę ITU 2012 All Rights Reserved
Contact for this page : TSB EDH
Updated : 2012-09-20