Standards World

IEC 62023:2011 pdf free download - Structuring of technical information and documentation The different structures suit different working tasks: - a function-oriented structure is based on the purpose of a system. A function-oriented structure shows the subdivision...

IEC 62109-3:2020 pdf free download - Safety of power converters for use in photovoltaic power systems The temperature test will be based on: a) Environmental temperature as defined in lEC 61730-1:2016 in degrees Celsius for the geographic...

IEC 61000-4-11:2020 pdf free download - Electromagnetic compatibility (EMC) lf it is necessary to verify the peak inrush drive current capability， the generator shall beswitched from 0 % to 100 % of full output,when driving a load...

IEC 61000-3-12:2011 pdf free download - Electromagnetic compatibility (EMC) 4.1Determination of the reference current The average r.m.s. input current shall be measured using the averaging method defined in4.2.2 for harmonic currents. Except for dimmers, the measurement shall...

IEC 61000-2-10:2021 pdf free download - Electromagnetic compatibility (EMC) 5.1 Introductory remarks The electromagnetic field generated by a high-altitude nuclear explosion described inIEC 61000-2-9 can induce currents and voltages in all metallic structures.These currents andvoltages propagating in...

IEC 60947-5-8:2020 pdf free download - Low-voltage switchgear and controlgear 9.3.3.6.2Mechanical durability The three samples (see 9.1) shall be subjected to the following test. The test shall be performed for minimum 50 000 cycles of position 1...

IEC 60793-2-40:2021 pdf free download - Optical fibres 2Normative references The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document.For dated references, only...

IEC 60793-1-44:2011 pdf free download - Optical fibres This procedure can determine the cut-off wavelength of a fibre specimen in either a cabled oruncabled condition.Each method has its own default configurations; the detail specificationwill give any different...

IEC 62044-3:2000 pdf free download - Cores made of soft magnetic materials -Measuring methods 1Scope This standard provides measuring methods for power loss and amplitude permeability ofmagnetic cores forming the closed magnetic circuits intended for use at...

IEC 61966-3:2000 pdf free download - Multimedia systems and equipment - Colour measurement and management 1Scope This part of lEC 61966 deals with equipment using cathode ray tubes (CRT) to display colourimages for use in multimedia applications....