Author(s): Quyen Huy Anh, Le Quang Trung
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 10 , October - 2017
Proper sizing the low voltage surge protective device (SPD), fabricated by metal oxide varistor (MOV) technology, will guarantee protection efficiency, so this paper focused on researching and developing in-deep study of some main points as follows: The coefficient of conversion between the surge rated current of 8/20μs waveform and of 10/350μs waveform, based on the equivalent of energy absorption; the ageing characteristic of MOV for 8/20μs waveform (instead of 2ms square waveform); determining the surge rated current of low voltage SPD, fabricated by multi block MOV technology, based on the attenuation coefficient of surge dissipation ability between metal oxide varistors, connected in parallel with different tolerance of threshold voltage.
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