TEN350 The waveform that hijacked the IEC lightning standards
What does the IEEE say about 10/350?
IEEE - What is it?
IEEE stands for Institute of Electrical and Electronics Engineers. It is an association dedicated to advancing innovation and technological excellence for the benefit of humanity. It is designed to serve professionals involved in all aspects of the electrical, electronic and computing fields and related areas of science and technology that underlie modern civilization.
By 2010, IEEE had over 395,000 members in 160 countries and served its members and their interests with 38 societies; 130 journals, transactions and magazines; more 300 conferences annually; and 900 active standards.
Through its worldwide network of geographical units, publications, web services, and conferences, IEEE remains the world's largest technical professional association.
Is there any legal statement from IEEE regarding the 10/350 waveform?
IEEE C62.41.2TM-2002 assessed the parameters of first stroke lightning, including the 350 μs “time to 1⁄2 peak” defined in IEC 61312 documents with the conclusion that: “The case for “high-energy” surge requirements rests on a consensus based on limited data, a matter of some concern when comparing these “requirements” with the field performance of SPDs designed on the basis of the standards of the IEEE C62 family.” (C62.41.2TM-2002 IEEE Recommended Practice on Characterization of Surges in Low- voltage (1000 V and Less) AC Power Circuits page 32.)
IEEE Std C62.62-2010 IEEE Standard Test Specifications for Surge-Protective Devices (SPDs) confirmed this by not approving a 10/350 test. It also refused to allow any "equivalency test" between the 10/350 and 8/20 waveforms.