About SG4 meeting in Washington DC Date : 2010-9-7 & 8 Place : IDEA (Industrial Data Exchange Association) office located in Crystal city near Washington DC Host : NEMA (National Electric Manufactures Association) SG4 : Convenor : Mr.Wim De Kesel (TC23 Secretary / Legrand) Secretary : Mr.Anders Elrud (SC23G Secretary / SEK) Scope : LVDC distribution systems up to 1500V DC in relation to energy efficiency 2019/2/23

Summary of SG4 meeting in Washington DC The conclusions of the meeting : TC100 interests 1) Voltage : candidate 48V as SELV (Safety Extra Low Voltage) 2) IEC standards shall be necessary : - Figures and dimensions of Outlet and Plug - Compatibility between Outlet and Plug - Meet the present performance and cost 3) Advantages : - Reduction of safety requirements by using SELV - Wiring System for Data Transfer added Another issues : 1) Voltage : 300-400V for Data Centre use, White goods use 2) Protection of persons, Inrush current, EMC, Arc flush, etc,. 2019/2/23

Observations for SG4 - DC distribution seems one of the most efficient means to reduce cost and user benefits for TC100 equipment - IEC is the one and only organization for standardisation of DC distribution as same as smart grid of E3 - SG4 activity is very important to TC100 as same as SG3 - Home appliances must be one of the first users - There is not enough involvement by Consumer Equipment to SG4 - TC100 is able to contribute SG4 in home use and should collaborate with TC59 - TC100 should request SG4 to consider more promotion of LVDC such as workshop like SG3 had it in July as soon as possible 2019/2/23