New Technical Parameters and Operational Improvements of the Metal Oxide Varistors Manufacturing Process

Manufacturing of zinc oxide varistors

The effect of repetitive swells on metal-oxide varistors

Neither the effects of repetitive swells on metal-oxide varistors, nor the natural occurrence of swells had been documented in the literature. The paper briefly described a laboratory system capable of generating arbitrary swells and applying them to test varistors. A statistical experiment on five lots of varistors was performed and preliminary results reported. Effects of amplitude, duration,...

technical and legal parameters for determination of river boundary,( case study haraz river)

چکیده با توسعه شهر نشینی و دخل و تصرف غیر مجاز در حریم رودخانه ها خسارات زیادی به رودخانه و محیط زیست اطراف آن وارده می شود. در حال حاضر بر اساس آئین نامه اصلاح شده بستر و حریم رودخانه ها، حریم کمی رودخانه که بلافاصله پس از بستر قرار می گیرد از 1 تا20 متر از منتهی الیه طرفین بستر رودخانه تعیین، که مقدار دقیق آن در هر بازه از رودخانه مشخص نیست. در کشورهای دیگر روشهای متفاوتی من جمله: درصد ریسک...

Lightning and NEMP Transient Protection with Metal Oxide Varistors

After a brief review of varistor fundamentals, including a discussion of the infamous " speed of response " issue, the report describes several unconventional packaging implementations of varistor material (usually a flat disc between metallized electrodes), such as molded axial package, bulkhead connectors, coaxial mounting, reconstituted material, and varistor substrates with surface conducti...

Quality Assessment of Metal Oxide Varistors by Noise Spectroscopy

− The noise spectroscopy in a frequency domain has been used as a diagnostic tool of high-voltage varistors consisting of grained ZnO. The electrical properties of tested specimens have been described. In this experimental study, we present the applied measurement system and the results of noise spectrum measurements for the selected structures of 280 V varistors. Noise properties are related t...