Standards World

IEC 60417-1:2000 pdf free download - Graphical symbols for use on equipment 1 Scope This part of lEC 60417 contains graphical symbols and their meaning (title and application).The graphical symbols in the standard are primarily intended -to...

IEC 62574:2020 pdf free download - Audio, video and multimedia systems - General channel assignmentof multichannel audio 1 Scope This document specifies the general channel assignment and the metadata for multichannelaudio formats. The general channel assignment as...

IEC 62541-8:2020 pdf free download - OPC unified architecture 4concepts Data Access deals with the representation and use of automation data in Servers. Automation data can be located inside the Server or on l/0 cards directly connected...

IEC 62067:2011 pdf free download - Power cables with extruded insulation and their accessories for rated voltagesabove 150 kV(Um= 170 kV) up to 500 kV(Um =550 kV)-Test methods andrequirements 10.2Frequency of tests The sample tests in items...

IEC 61904:2000 pdf free download - Video recording 4.1 Introduction Each television field is recorded on six helical tracks. The helical tracks contain digital data from the video channel, from four audio channels andfrom the tracking servo...

IEC 61788-7:2020 pdf free download - Superconductivity 5.2 Measurement apparatus for R, Figure 2 shows a schematic of a typical measurement apparatus (closed type resonator) forthe Rs of HTS films deposited on a substrate with a flat...

IEC 61701:2011 pdf free download - Salt mist corrosion testing of photovoltaic (PV) modules 1scope and object Photovoltaic(PV) modules are electrical devices intended for continuous outdoor exposureduring their lifetime.Highly corrosive wet atmospheres,such as marine environments, couldeventually degrade...

IEC 61557-12:2021 pdf free download - Electrical safety in low voltage distribution systems up to 1 000 v AC and1 500 v Dc- Equipment for testing, measuring or monitoring of protectivemeasures 1Scope This part of lEC 61557...

IEC 61514:2000 pdf free download - Industrial-process control systems 1 Scope and object This International Standard specifies tests designed to determine the static and dynamicperformance of single-acting or double-acting positioners. The tests may be applied topositioners which...

IEC 60904-9:2020 pdf free download - Photovoltaic devices 1 Scope lEC standards for photovoltaic devices require the use of specific classes of solar simulatorsdeemed appropriate for specific tests. Solar simulators can be either used for performancemeasurements of...