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Classification of environmental conditions. Guidance for the correlation and transformation of environmental condition classes of IEC 60721-3 to the environmental tests of IEC 60068 - Portable and non-stationary use. Original standard PD IEC TR 60721-4-7-2001 (2003) in PDF full version. Additional info + preview on request
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Consideration of reference impedances and public supply network impedances for use in determining disturbance characteristics of electrical equipment having a rated current ≤ 75 A per phase. Original standard PD IEC TR 60725-2012 in PDF full version. Additional info + preview on request
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Cable networks for television signals, sound signals and interactive services - A study of IPTV systems with examples and applications for optical broadcast services. Original standard PD IEC TR 60728-201-2024 in PDF full version. Additional info + preview on request
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Cable networks for television signals, sound signals and interactive services - Method of measurement of 5th order non-linearity for active electronic equipment using five carriers. Original standard PD IEC TR 60728-3-2-2016 in PDF full version. Additional info + preview on request
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Semiconductor devices - Optoelectronic devices. Light emitting diodes. Test method of LED efficiencies. Original standard PD IEC TR 60747-5-12-2021 in PDF full version. Additional info + preview on request
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Application guide for the selection of high-voltage current-limiting fuse-links for transformer circuits. Original standard PD IEC TR 60787-2007 in PDF full version. Additional info + preview on request
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