{"title":"Clearing Time Considerations for DC ARC Flash Hazard Analysis of Battery Banks","authors":"Kyle D. Carr","doi":"10.1109/ESW41044.2018.9063877","DOIUrl":null,"url":null,"abstract":"Since empirical calculation methods of Arc Flash for DC systems are not yet available, several types of models and equation approaches are available for use with varying degrees of success in estimating a conservative thermal incident energy estimate for DC power systems. One of the undetermined variables for any of these calculations is the clearing time of any protective devices that may relate to the system configuration. The utility of the arcing currents derived from the DC arc flash calculation methods available does not always correlate well with estimating realistic clearing times for protective devices. This paper reviews the various commonly used calculation methods and proposes approaches for bracketing usable clearing times for calculations based on Time-Current Curves (TCC) for typical protective devices used in industry for battery banks. The methods used are directly applicable to other DC systems if the appropriate clearing time information and voltage current curves for non-linear are available.","PeriodicalId":150498,"journal":{"name":"2018 IEEE IAS Electrical Safety Workshop (ESW)","volume":"327 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE IAS Electrical Safety Workshop (ESW)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ESW41044.2018.9063877","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Since empirical calculation methods of Arc Flash for DC systems are not yet available, several types of models and equation approaches are available for use with varying degrees of success in estimating a conservative thermal incident energy estimate for DC power systems. One of the undetermined variables for any of these calculations is the clearing time of any protective devices that may relate to the system configuration. The utility of the arcing currents derived from the DC arc flash calculation methods available does not always correlate well with estimating realistic clearing times for protective devices. This paper reviews the various commonly used calculation methods and proposes approaches for bracketing usable clearing times for calculations based on Time-Current Curves (TCC) for typical protective devices used in industry for battery banks. The methods used are directly applicable to other DC systems if the appropriate clearing time information and voltage current curves for non-linear are available.