IEC 62054-21-2004 Electricity metering (a.c.) - Tariff and load control - Part 21 Particular requirements for time switches《交流测量.费率和负荷控制.第21部分 时间开关的特殊要求》.pdf

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IEC TS 62492-1-2008 Industrial process control devices - Radiation thermometers - Part 1 Technical data for radiation thermometers《工业过程控制装置 辐射温度计 第1部分 辐射温度计的技术数.pdf

IEC TR2 61464-1998 Insulated bushings - Guide for the interpretation of dissolved gas analysis (DGA) in bushings where oil is the impregnating medium of the mai.pdf

IEC TR 61241-2-2-1993 Electrical apparatus for use in the presence of combustible dust part 2 test methods section 2 method for determining the electrical resis.pdf

IEC TR 60972-1989 Classification and interpretation of new lighting products《新型照明产品的分类和说明》.pdf

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IEC TR 60919-2-2008 Performance of high-voltage direct current (HVDC) systems with line-communicated converters - Part 2 Faults and switching《带线性通信转换器的高压直流(HVDC.pdf

IEC TR 60870-6-505 Edition 11-2006 Telecontrol equipment and systems - Part.6-505 Telecontrol protocols compatible with ISO standards and ITU-T recommendations .pdf

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