{"product_id":"abb-rej603bb401nn3xe-rej603-relion-605-series","title":"ABB REJ603BB401NN3XE  REJ603 | Relion 605 Series","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB REJ603BB401NN3XE\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(also known as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eREJ603E\u003c\/strong\u003e) is a specialized self-powered feeder protection relay within the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRelion® 605 series\u003c\/strong\u003e. It is specifically engineered to protect medium-voltage feeders from overcurrent and earth faults in utility and industrial distribution networks. \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel Designation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eREJ603BB401NN3XE \/ REJ603E\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRelion 605\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSelf-powered from CT secondary current (no auxiliary supply required)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRated Frequency:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e50 Hz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProtection Functions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eNon-directional Overcurrent Protection (High and Low set stages)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNon-directional Earth-fault Protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTrip Circuit Supervision\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eI\/O Configuration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBinary inputs and outputs for external control and signaling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated LED indicators and mechanical trip flag\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaintenance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eContinuous internal self-supervision with fault alarms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCompact flush-mount design for panel integration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering \u0026amp; Operational Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAutonomous Reliability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBy operating independently of external power, the REJ603E ensures that protection logic is functional even during total station blackouts, provided there is current flow.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReduced Lifecycle Costs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe absence of auxiliary power requirements means fewer cables, no battery maintenance, and simplified station design, leading to lower Total Cost of Ownership (TCO).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRapid Diagnostics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe combination of electronic LEDs and a permanent mechanical trip flag ensures that maintenance teams can identify the cause of a trip (overcurrent vs. earth fault) instantly upon arrival at the site.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Supervision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe relay performs constant self-checks on its internal hardware and software, triggering an alarm if an internal fault (IRF) is detected, thereby preventing silent failures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEasy Commissioning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBuilt-in test functions allow for the simulation of trip conditions, significantly speeding up the commissioning and periodic maintenance process.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":46796463210686,"sku":"REJ603BB401NN3XE  REJ603","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-05-08_09-54-25_c792ef2b-2fe3-4492-8148-a2c5647a870e.png?v=1778205801","url":"https:\/\/www.autooiltech.com\/products\/abb-rej603bb401nn3xe-rej603-relion-605-series","provider":"AutoOilTech Limited","version":"1.0","type":"link"}