Condition monitoring and deterioration analysis of metal oxide varistor

Metal Oxide ZnO-Based Varistor Ceramics

Model for zinc oxide varistor

Zinc oxide varistors are very complex systems, and the dominant mechanism of voltage barrier formation in these systems has not been well established. Yet the MNDO quantum mechanical theoretical calculation was used in this work to determine the most probable defect type at the surface of a ZnO cluster. The proposed model represents well the semiconducting nature as well as the defects at the Z...

The Effects of Electrical Degradation on the Microstructure of Metal Oxide Varistor

-In this paper, the findings from systematic experiments with the purpose to determine the degradation effect of single and multiple current pulses on the microstructure of the Metal Oxide (MO) varistor are described. Six distribution class varistors from one manufacturer were used in these experiments. The first part of the paper describes the electrical condition after application of single a...

Availability analysis of mechanical systems with condition-based maintenance using semi-Markov and evaluation of optimal condition monitoring interval

Maintenance helps to extend equipment life by improving its condition and avoiding catastrophic failures. Appropriate model or mechanism is, thus, needed to quantify system availability vis-a-vis a given maintenance strategy, which will assist in decision-making for optimal utilization of maintenance resources. This paper deals with semi-Markov process (SMP) modeling for steady state availabili...

Metal-oxide varistor: A new way to suppress transients (B/W)

Significance Part 6: Textbooks, tutorials and reviews Part 7: Mitigation techniques Trade press announcement of the introduction to the U.S. market of Metal-Oxide Varistors intended for incorporation in original equipment manufacturers (OEM) equipment, with discussion of the principle of operation, background information on the origin of transients, and application information. It is noteworthy...