{"id":5157,"date":"2026-06-29T15:33:43","date_gmt":"2026-06-29T12:33:43","guid":{"rendered":"https:\/\/elseta.com\/?post_type=project&#038;p=5157"},"modified":"2026-06-29T15:46:56","modified_gmt":"2026-06-29T12:46:56","slug":"comtrade-disturbance-recording-ertu","status":"publish","type":"project","link":"https:\/\/elseta.com\/project\/comtrade-disturbance-recording-ertu\/","title":{"rendered":"COMTRADE Disturbance Recording with Elseta eRTU"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Overview<\/h2>\n\n\n\n<p>Elseta <a href=\"https:\/\/elseta.com\/products\/RTUs\/eRTU\/\">eRTU<\/a> can record current and voltage waveforms in COMTRADE format. This gives DSOs detailed information about faults and other disturbances in medium-voltage networks.<\/p>\n\n\n\n<p>Unlike a standard SCADA alarm, which only reports that an event occurred, a COMTRADE record shows how electrical values changed before, during, and after the event. Engineers can use this data to investigate faults, check protection operation, and better understand feeder behaviour.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Challenge<\/h2>\n\n\n\n<p>Fault indications and event logs provide useful operational information, but they do not always explain what actually happened in the network.<\/p>\n\n\n\n<p>Without waveform data, it can be difficult to determine:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What type of fault occurred<\/li>\n\n\n\n<li>Whether the event was transient or permanent<\/li>\n\n\n\n<li>How currents and voltages changed during the fault<\/li>\n\n\n\n<li>Whether protection and switching equipment operated correctly<\/li>\n\n\n\n<li>Whether similar disturbances are recurring at the same location<\/li>\n<\/ul>\n\n\n\n<p>This can lead to longer investigations, unnecessary site visits, and decisions based on incomplete information.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Elseta Solution<\/h2>\n\n\n\n<p>The eRTU records measured currents and voltages when a configured disturbance condition is detected. The recording captures the event and stores it in the standard COMTRADE format.<\/p>\n\n\n\n<p>The resulting file can be opened using common COMTRADE analysis software. Engineers can inspect individual phases, compare voltage and current waveforms, view event timing, and correlate the recording with SCADA alarms, switch positions, fault indications, and Sequence of Events logs.<\/p>\n\n\n\n<p>Because disturbance recording is integrated into the eRTU, DSOs can collect this information directly from secondary substations, RMUs, and MV feeders without installing a separate disturbance recorder.<\/p>\n\n\n\n<p>Additionally, the eRTU&#8217;s FPI features on the BCM units can provide bidirectional fault detection with automatic fault-triggered isolation and both transient and permanent fault recognition. You can find more details about the fault detection functionalities here: <a href=\"https:\/\/wiki.elseta.com\/books\/fpi-with-rj45\/page\/iomod-fpi-with-rj45-user-manual#bkmrk-protection-functions\">Elseta Wiki<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Typical Applications<\/h2>\n\n\n\n<p>COMTRADE records can support:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Phase-to-phase and earth-fault analysis<\/li>\n\n\n\n<li>Verification of protection and automation operation<\/li>\n\n\n\n<li>Investigation of voltage dips and current peaks<\/li>\n\n\n\n<li>Analysis of switching events and transformer inrush current<\/li>\n\n\n\n<li>Comparison of recurring disturbances<\/li>\n\n\n\n<li>Fault investigation in networks with distributed generation<\/li>\n\n\n\n<li>Remote technical assessment before dispatching field crews<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Benefits for DSOs<\/h2>\n\n\n\n<p><strong>More detail than a SCADA alarm<\/strong><br>Engineers can see the actual current and voltage waveforms associated with an event.<\/p>\n\n\n\n<p><strong>Faster fault investigation<\/strong><br>Recorded data helps identify the likely fault type and assess the affected feeder before a site visit.<\/p>\n\n\n\n<p><strong>Protection verification<\/strong><br>COMTRADE records can be compared with relay, recloser, and switch operation to confirm whether the protection sequence worked as intended.<\/p>\n\n\n\n<p><strong>Standard file format<\/strong><br>Records can be analysed using commonly available COMTRADE tools without being tied to proprietary software.<\/p>\n\n\n\n<p><strong>No separate recorder required<\/strong><br>Measurement, remote control, event logging, fault indication, and disturbance recording are combined in one modular RTU platform.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>COMTRADE disturbance recording adds detailed post-event analysis to the eRTU\u2019s monitoring and control functions. With recording at MV grid locations, DSOs can investigate disturbances more accurately, verify protection operation, and make better-informed maintenance and network operation decisions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Elseta eRTU can record current and voltage waveforms in COMTRADE format. This gives DSOs detailed information about faults and other disturbances in medium-voltage networks. Unlike a standard SCADA alarm, which only reports that an event occurred, a COMTRADE record shows how electrical values changed before, during, and after the event. Engineers can use this [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":5162,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"project_category":[9],"project_tag":[],"class_list":["post-5157","project","type-project","status-publish","has-post-thumbnail","hentry","project_category-solutions-category"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>COMTRADE Disturbance Recording with Elseta eRTU | elseta.com<\/title>\n<meta name=\"description\" content=\"Capture COMTRADE disturbance records with Elseta eRTU to analyse MV grid faults, verify protection operation, and reduce investigation time.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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