{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T15:19:53Z","timestamp":1780327193643,"version":"3.54.1"},"reference-count":28,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2021,12,15]],"date-time":"2021-12-15T00:00:00Z","timestamp":1639526400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper proposes a solution for the development of microclimate monitoring for Low Voltage\/High Voltage switchgear using the PRTG Internet of Things (IoT) platform. This IoT-based real time monitoring system can enable predictive maintenance to reduce the risk of electrical station malfunctions due to unfavorable environmental conditions. The combination of humidity and dust can lead to unplanned electrical discharges along the isolators inside a low or medium voltage electric table. If no predictive measures are taken, the situation may deteriorate and lead to significant damage inside and outside the switchgear cell. Thus, the mentioned situation can lead to unprogrammed maintenance interventions that can conduct to the change of the entire affected switchgear cell. Using a low-cost and efficient system, the climate conditions inside and outside the switchgear are monitored and transmitted remotely to a monitoring center. From the results obtained using a 365-day time interval, we can conclude that the proposed system is integrated successfully in the switchgear maintaining process, having as result the reduction of maintenance costs.<\/jats:p>","DOI":"10.3390\/s21248372","type":"journal-article","created":{"date-parts":[[2021,12,15]],"date-time":"2021-12-15T21:47:36Z","timestamp":1639604856000},"page":"8372","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Partial Discharge and Internet of Things: A Switchgear Cell Maintenance Application Using Microclimate Sensors"],"prefix":"10.3390","volume":"21","author":[{"given":"Radu","family":"Fechet","sequence":"first","affiliation":[{"name":"Computers, Electronics and Automation Department, Stefan cel Mare University of Suceava, 720229 Suceava, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6188-5610","authenticated-orcid":false,"given":"Adrian I.","family":"Petrariu","sequence":"additional","affiliation":[{"name":"Computers, Electronics and Automation Department, Stefan cel Mare University of Suceava, 720229 Suceava, Romania"},{"name":"MANSiD Research Center, Stefan cel Mare University of Suceava, 720229 Suceava, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adrian","family":"Graur","sequence":"additional","affiliation":[{"name":"Computers, Electronics and Automation Department, Stefan cel Mare University of Suceava, 720229 Suceava, Romania"},{"name":"MANSiD Research Center, Stefan cel Mare University of Suceava, 720229 Suceava, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Peng, K. (2012). Equipment Management in the Post-Maintenance Era: A New Alternative to Total Productive Maintenance (TPM), CRC Press.","DOI":"10.1201\/b11916"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Upton, D.W., Mistry, K.K., Mather, P.J., Zaharis, Z.D., Atkinson, R.C., Tachtatzis, C., and Lazaridis, P.I. (2021). A Review of Techniques for RSS-Based Radiometric Partial Discharge Localization. Sensors, 21.","DOI":"10.3390\/s21030909"},{"key":"ref_3","unstructured":"Nagdev, A., and Tarun, G. (2018, January 23\u201325). Fault Class Prediction in Unsupervised Learning using Model-Based Clustering Approach. Proceedings of the 2018 International Conference on Information and Computer Technologies (ICICT), DeKalb, IL, USA."},{"key":"ref_4","unstructured":"Rykov, M. (2021, July 28). The Top 10 Industrial AI Use Cases. Available online: https:\/\/iot-analytics.com\/the-top-10-industrial-ai-use-cases."},{"key":"ref_5","unstructured":"(2021, September 08). MV Switchgear. Available online: https:\/\/electroalfa.ro\/referinte-infrastructura\/."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1109\/MEI.2015.7303259","article-title":"An overview of state-of-the-art partial discharge analysis techniques for condition monitoring","volume":"31","author":"Wu","year":"2015","journal-title":"IEEE Electr. Insul. Mag."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"3277","DOI":"10.1109\/TIE.2019.2908580","article-title":"A Novel Application of Deep Belief Networks in Learning Partial Discharge Patterns for Classifying Corona, Surface, and Internal Discharges","volume":"67","author":"Karimi","year":"2020","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_8","unstructured":"IEC 60270 (2000). High-Voltage Test Techniques\u2014Partial Discharge Measurement, IEC. [3rd ed.]. Version 2000."},{"key":"ref_9","unstructured":"Janus, P. (2012). Acoustic Emission Properties of Partial Discharges in the Time-Domain and Their Applications. [Master\u2019s Thesis, School of Electrical Engineering]. XR-EE-ETK 2012 004."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Xiao, S., Moore, P., Judd, M., and Portugues, I. (2007, January 24\u201328). An investigation into electromagnetic radiation due to partial discharges in high voltage equipment. Proceedings of the 2007 IEEE Power Engineering Society General Meeting, Tampa, FL, USA.","DOI":"10.1109\/PES.2007.385659"},{"key":"ref_11","unstructured":"Davies, N., Tang, J., and Shiel, P. (2007, January 21\u201324). Benefits and experiences of non-intrusive partial discharge measurements on MV Switchgear. Proceedings of the 19th International Conference on Electricity Distribution, Vienna, Austria."},{"key":"ref_12","unstructured":"Lemesch, G. (2004, January 14\u201317). Ozone Measurement\u2014A Diagnosis Tool for PD-Detection in Large Generators. Proceedings of the Iris Rotating Machine Conference, New Orleans, LA, USA."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Javed, H., Li, K., Zhang, G.-Q., and Plesca, A.T. (2017, January 20\u201323). Online monitoring of partial discharge initiated under metallic protrusion defect in high humidity by measuring air decomposition by-products. Proceedings of the 2017 2nd International Conference on Power and Renewable Energy (ICPRE), Chengdu, China.","DOI":"10.1109\/ICPRE.2017.8390536"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"VanHaeren, R., Stone, G., Meehan, J., and Kurtz, M. (1985). Preventing failures in outdoor distribution-class metalclad switchgear. IEEE Trans. Power Appar. Syst., 2706\u20132712.","DOI":"10.1109\/TPAS.1985.319111"},{"key":"ref_15","unstructured":"Stone, G.C., and Warren, V. (2004, January 25\u201330). Advancements in interpreting partial discharge test results to assess stator winding condition. Proceedings of the IEEE-IAS\/PCA 2004 Cement Industry Technical Conference, Chattanooga, TN, USA."},{"key":"ref_16","unstructured":"(2021, October 05). EATechnology. Available online: www.eatechnology.com."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Goldthorpe, S., Ferris, R., and Hodgson, S. (2009, January 8\u201311). Use of web based partial discharge monitoring to extend asset life. Proceedings of the 20th International Conference on Electricity Distribution, Prague, Czech Republic.","DOI":"10.1049\/cp.2009.0818"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1123","DOI":"10.1109\/TDEI.2017.005920","article-title":"Calculation model for predicting partial-discharge inception voltage in a non-uniform air gap while considering the effect of humidity","volume":"24","author":"Rokunohe","year":"2017","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"2633","DOI":"10.1109\/TDEI.2016.7736821","article-title":"Influence of humidity and voltage on characteristic decomposition components under needle-plate discharge model","volume":"23","author":"Zhang","year":"2016","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Davies, N., and Jones, D. (2008, January 9\u201312). Testing Distribution Switchgear for Partial Discharge in the Laboratory and the Field. Proceedings of the Conference Record of the 2008 IEEE International Symposium on Electrical Insulation, Vancouver, BC, Canada.","DOI":"10.1109\/ELINSL.2008.4570430"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Byrne, T. (2014, January 3\u20135). Humidity effects in substations. Proceedings of the 2014 Petroleum and Chemical Industry Conference Europe, Amsterdam, The Netherlands.","DOI":"10.1109\/PCICEurope.2014.6900056"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Samaitis, V., Ma\u017eeika, L., Jankauskas, A., and Rekuvien\u0117, R. (2021). Detection and Localization of Partial Discharge in Connectors of Air Power Lines by Means of Ultrasonic Measurements and Artificial Intelligence Models. Sensors, 21.","DOI":"10.3390\/s21010020"},{"key":"ref_23","unstructured":"Murata Electronics (2021, November 28). MA40S4S\u2014Ultrasonic Sensor. Available online: https:\/\/www.murata.com\/-\/media\/webrenewal\/products\/sensor\/ultrasonic\/open\/datasheet_maopn.ashx."},{"key":"ref_24","unstructured":"Aosong Electronics Co., Ltd. (2021, November 28). DHT22\u2014Digital-Output Relative Humidity & Temperature Sensor\/Module. Available online: https:\/\/www.sparkfun.com\/datasheets\/Sensors\/Temperature\/DHT22.pdf."},{"key":"ref_25","unstructured":"ASAIR (2021, November 28). DHT20\u2014Humidity and Temperature Module. Available online: https:\/\/cdn.sparkfun.com\/assets\/8\/a\/1\/5\/0\/DHT20.pdf."},{"key":"ref_26","unstructured":"Bosch (2021, November 28). BME680\u2014Low Power Gas, Pressure, Temperature & Humidity Sensor. Available online: https:\/\/www.bosch-sensortec.com\/media\/boschsensortec\/downloads\/datasheets\/bst-bme680-ds001.pdf."},{"key":"ref_27","unstructured":"Banks, A., and Gupta, R. (2021, July 28). OASIS standard\u2014MQTT Version 3.1.1. Available online: https:\/\/docs.oasis-open.org\/mqtt\/mqtt\/v3.1.1\/mqtt-v3.1.1.html,."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"105","DOI":"10.3390\/fi10110105","article-title":"An Integrated Platform for the Internet of Things Based on an Open-Source Ecosystem","volume":"10","author":"YangQun","year":"2018","journal-title":"Future Internet"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/24\/8372\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:48:42Z","timestamp":1760168922000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/24\/8372"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,12,15]]},"references-count":28,"journal-issue":{"issue":"24","published-online":{"date-parts":[[2021,12]]}},"alternative-id":["s21248372"],"URL":"https:\/\/doi.org\/10.3390\/s21248372","relation":{"has-preprint":[{"id-type":"doi","id":"10.20944\/preprints202111.0036.v1","asserted-by":"object"}]},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,12,15]]}}}