{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T17:58:15Z","timestamp":1776189495825,"version":"3.50.1"},"reference-count":24,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,6,30]],"date-time":"2022-06-30T00:00:00Z","timestamp":1656547200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Academy of Romanian Scientists, Bucharest, Romania","award":["AOSR-2021"],"award-info":[{"award-number":["AOSR-2021"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>This article presents an original experimental method applied to assess the stability limits of a given Metal Oxide Varistor (MOV), with cylindrical symmetry (cylinder or disk shape), as a direct relation between the ambient temperature and the service rated voltage, in the permanent operational regime. As the crossing current of a certain varistor is heavily influenced by its physical temperature, we must find an empirical relationship between these two parameters for a symmetrical configuration. Each ambient temperature can increase the temperature reference and any higher voltage will also produce an increased current, causing a uncontrolled runaway heating process, in an avalanche model. We tried to eliminate any references to technical dimensions or device values, focusing on material parameters. In the case of a symmetric MOV, we will consider the load coefficient, which is the ratio between the service DC voltage and the nominal DC opening voltage. By using experimental measurements and a simple mathematical model, we will establish the relation between the critical load coefficient and the ambient temperature in the case of symmetrical MOVs. This procedure could be applied to the design of more performant and safe surge arrester devices using existing MOVs, for all voltage levels and symmetrical configurations.<\/jats:p>","DOI":"10.3390\/sym14071351","type":"journal-article","created":{"date-parts":[[2022,7,1]],"date-time":"2022-07-01T01:40:36Z","timestamp":1656639636000},"page":"1351","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Service Limits for Metal Oxide Varistors Having Cylindrical Symmetry as Function of the Ambient Temperature"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7212-9706","authenticated-orcid":false,"given":"Attila","family":"Simo","sequence":"first","affiliation":[{"name":"Faculty of Electrical and Power Engineering, Politehnica University of Timisoara, 2, V. Parvan Bvd., 300223 Timisoara, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3340-5402","authenticated-orcid":false,"given":"Flaviu Mihai","family":"Frigura-Iliasa","sequence":"additional","affiliation":[{"name":"Faculty of Electrical and Power Engineering, Politehnica University of Timisoara, 2, V. Parvan Bvd., 300223 Timisoara, Romania"}]},{"given":"Mihaela","family":"Frigura-Iliasa","sequence":"additional","affiliation":[{"name":"Faculty of Electrical and Power Engineering, Politehnica University of Timisoara, 2, V. Parvan Bvd., 300223 Timisoara, Romania"}]},{"given":"Petru","family":"Andea","sequence":"additional","affiliation":[{"name":"Faculty of Electrical and Power Engineering, Politehnica University of Timisoara, 2, V. Parvan Bvd., 300223 Timisoara, Romania"},{"name":"Academy of Romanian Scientists, 54, Independentei Str, 050094 Bucharest, Romania"}]},{"given":"Sorin","family":"Musuroi","sequence":"additional","affiliation":[{"name":"Faculty of Electrical and Power Engineering, Politehnica University of Timisoara, 2, V. Parvan Bvd., 300223 Timisoara, Romania"},{"name":"Academy of Romanian Scientists, 54, Independentei Str, 050094 Bucharest, Romania"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,30]]},"reference":[{"key":"ref_1","unstructured":"Bajenescu, T.M., and Bazu, M. (2009). Component Reliability for Electronic Systems, Artech House."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Frigura-Iliasa, F.M., Musuroi, S., Sorandaru, C., and Vatau, D. (2019). New Technical Parameters and Operational Improvements of the Metal Oxide Varistors Manufacturing Process. Processes, 7.","DOI":"10.3390\/pr7010018"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Frigura-Iliasa, F.M., Musuroi, S., Sorandaru, C., and Vatau, D. (2019). Case Study about the Energy Absorption Capacity of Metal Oxide Varistors with Thermal Coupling. Energies, 12.","DOI":"10.3390\/en12030536"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Tarfulea, N., Frigura-Iliasa, F.M., Vatau, D., Andea, P., Balcu, F., and Macarie, A. (2016, January 7\u201310). A new Algorithm for the Design of Metal Oxide Varistor Surge Arresters. Proceedings of the 2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC), Florence, Italy.","DOI":"10.1109\/EEEIC.2016.7555733"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"736","DOI":"10.1143\/JJAP.10.736","article-title":"Nonohmic Properties of Zinc Oxide Ceramics","volume":"10","author":"Matsuoka","year":"1971","journal-title":"Jpn. J. Appl. Phys."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1570","DOI":"10.1049\/iet-gtd.2015.0728","article-title":"Thermal balance diagram modelling of surge arrester for thermal stability analysis considering ZnO varistor degradation effect","volume":"7","author":"Seyyedbarzegar","year":"2016","journal-title":"IET Gen. Transm. Distrib."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"295","DOI":"10.1016\/j.measurement.2017.07.055","article-title":"A new approach to electrical modelling of surge arrester considering temperature effect on V-I characteristic","volume":"111","author":"Seyyedbarzegar","year":"2017","journal-title":"Measurement"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"McBride, M., Persson, N., Reichmanis, A., and Grover, C.D. (2018). Solving Materials\u2019 Small Data Problem with Dynamic Experimental Databases. Processes, 6.","DOI":"10.3390\/pr6070079"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Liu, S., and Liu, W. (2018). Experimental Development Process of a New Fluid\u2013Solid Coupling Similar-Material Based on the Orthogonal Test. Processes, 6.","DOI":"10.3390\/pr6110211"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Li, S., Mirlekar, G., Ruiz-Mercado, G.J., and Lima, F.V. (2016). Development of Chemical Process Design and Control for Sustainability. Processes, 4.","DOI":"10.3390\/pr4030023"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Latiff, N.A.A., Illias, H.A., Bakar, A.H.A., and Dabbak, S.Z.A. (2018). Measurement and Modelling of Leakage Current Behaviour in ZnO Surge Arresters under Various Applied Voltage Amplitudes and Pollution Conditions. Energies, 11.","DOI":"10.3390\/en11040875"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1081","DOI":"10.12693\/APhysPolA.116.1081","article-title":"Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions","volume":"116","author":"Loncar","year":"2009","journal-title":"Acta Phys. Pol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1108\/MI-02-2017-0009","article-title":"Electrical and microstructural characterization of doped ZnO based multilayer varistors","volume":"34","author":"Kulawik","year":"2017","journal-title":"Microelectron. Int."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"2538","DOI":"10.1109\/TPWRD.2015.2506785","article-title":"Electrical-Thermal Failure of Metal-Oxide Arrester by Successive Impulses","volume":"6","author":"Li","year":"2016","journal-title":"IEEE Trans. Power Deliv."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Lu, J., Xie, P., Fang, Z., and Hu, J. (2018). Electro-Thermal Modeling of Metal-Oxide Arrester under Power Frequency Applied Voltages. Energies, 11.","DOI":"10.3390\/en11061610"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Christodoulou, C.A., Vita, V., Mladenov, V., and Ekonomou, L. (2018). On the Computation of the Voltage Distribution along the Non-Linear Resistor of Gapless Metal Oxide Surge Arresters. Energies, 11.","DOI":"10.3390\/en11113046"},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Fang, Z., Wang, B., Lu, J., and Jiang, Z. (2018). Study on Impulse Breakdown Characteristics of Internal-Gap Lightning Protection Device Applied to 35 kV Distribution Line. Energies, 11.","DOI":"10.3390\/en11071758"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"5278","DOI":"10.3390\/ijms13045278","article-title":"Synthesis Mechanism of Low-Voltage Praseodymium Oxide Doped Zinc Oxide Varistor Ceramics Prepared Through Modified Citrate Gel Coating","volume":"13","author":"Zakaria","year":"2012","journal-title":"Int. J. Mol. Sci."},{"key":"ref_19","unstructured":"VARSI d.o.o. (2022, April 02). Slovenia, Main Varistor Catalogue. Available online: https:\/\/fastron.com.au\/collections\/vendors?rb_vendor=Varsi-Raycap."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Pronin, I., Yakushova, N., Averin, I., Karmanov, A., Moshnikov, V., and Dimitrov, D. (2018). Development of a Physical Model of Thermovoltaic Effects in the Thin Films of Zinc Oxide Doped with Transition Metals. Coatings, 8.","DOI":"10.3390\/coatings8120433"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Xu, J., Strempel, K., Zhou, H., Waag, A., Bertke, M., Schmidt, A., and Peiner, E. (2018). Area-Selective Growth of Aligned ZnO Nanorod Arrays for MEMS Device Applications. Proceedings, 2.","DOI":"10.3390\/proceedings2130887"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Kubiak, A., Siwi\u0144ska-Ciesielczyk, K., and Jesionowski, T. (2018). Titania-Based Hybrid Materials with ZnO, ZrO2 and MoS2: A Review. Materials, 11.","DOI":"10.3390\/ma11112295"},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Khan, R., Inam, M.A., Park, D.R., Zam Zam, S., and Yeom, I.T. (2018). Taguchi Orthogonal Array Dataset for the Effect of Water Chemistry on Aggregation of ZnO Nanoparticles. Data, 3.","DOI":"10.20944\/preprints201805.0428.v2"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Dogaru, E.A., Pocola, A.A., Crisovan, F.I., Frigura-Iliasa, M., Frigura-Iliasa, F.M., and Vatau, V. (2021, January 14\u201315). About Establishing the Functional Service Limits for Low Voltage Metal Oxide Varistors. Proceedings of the 2021 10th International Conference on ENERGY and ENVIRONMENT (CIEM), Bucharest, Romania.","DOI":"10.1109\/CIEM52821.2021.9614816"}],"container-title":["Symmetry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-8994\/14\/7\/1351\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:41:17Z","timestamp":1760139677000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-8994\/14\/7\/1351"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,6,30]]},"references-count":24,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2022,7]]}},"alternative-id":["sym14071351"],"URL":"https:\/\/doi.org\/10.3390\/sym14071351","relation":{},"ISSN":["2073-8994"],"issn-type":[{"value":"2073-8994","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,6,30]]}}}