{"title":"Electromechanical Differential Relays Misoperation and Investigation","authors":"A. Rangel","doi":"10.1109/CPRE48231.2021.9429717","DOIUrl":"https://doi.org/10.1109/CPRE48231.2021.9429717","url":null,"abstract":"In November 2017, an industrial site had a full blackout due to both of its main electromechanical differential relays operating due to a downstream ground fault. Due to system complexity, as well as lack of commissioning during a tie breaker installation, a mistake was introduced into the protection system. This paper describes the investigation into the nuisance trips and how proper commissioning could have prevented this issue.","PeriodicalId":405115,"journal":{"name":"2021 74th Conference for Protective Relay Engineers (CPRE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114990524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}