{"product_id":"abb-rej603bb401nn31e-feeder-protection-relay","title":"ABB REJ603BB401NN31E Feeder Protection Relay","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB REJ603BB401NN31E\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a self-powered feeder protection relay from the Relion® 605 series. It safeguards medium-voltage feeders against overcurrent and earth faults while providing reliable monitoring and control functions. This relay operates independently without requiring an external auxiliary power supply, making it ideal for retrofit and remote installations. Its compact design and integrated local HMI with LED indicators allow quick status checks and seamless integration into existing panels.\u003c\/p\u003e\n\u003cp\u003eMoreover, the REJ603BB401NN31E ensures continuous internal supervision and high operational reliability, minimizing downtime in industrial and utility distribution networks. Built-in testing functions simplify commissioning and maintenance, while binary inputs and outputs support flexible control and signaling. This relay delivers essential feeder protection functions with robust industrial-grade dependability, supporting both utilities and industrial systems.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelf-Powered Operation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOperates directly from current transformers, eliminating external power dependency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompact Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLightweight and small footprint enables efficient panel integration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated HMI:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLocal interface with LEDs and optional flag indication for rapid diagnostics.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReliable Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOvercurrent and earth-fault protection ensure system safety.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eContinuous Supervision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eInternal monitoring with alarms improves operational reliability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Connectivity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBinary inputs and outputs support signaling and control applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt-in Testing:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCommissioning and maintenance simplified with automated test functions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower Supply:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSelf-powered from CTs, no external auxiliary supply needed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency:\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\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEarth-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\u003eInputs\/Outputs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eBinary inputs and outputs for control and signaling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCT inputs for measurement and power supply\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelf-Supervision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eContinuous internal monitoring with alarm indication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTesting:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBuilt-in test functions for commissioning and maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePhysical Dimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eHeight: 160 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLength: 151.4 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWidth: 130 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeight: 1.43 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMedium-voltage distribution substations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIndustrial power systems requiring robust feeder protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUtility feeder protection networks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote or retrofit installations where external power supply is limited\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Does the REJ603BB401NN31E require an external power supply?\u003c\/strong\u003e\u003cbr\u003eA1: No, the relay is self-powered through current transformers, eliminating auxiliary power dependency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Can the relay provide diagnostic information locally?\u003c\/strong\u003e\u003cbr\u003eA2: Yes, it features an integrated HMI with LED indicators and optional flag signaling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Is this relay suitable for industrial and utility networks?\u003c\/strong\u003e\u003cbr\u003eA3: Absolutely, it supports both industrial feeders and utility medium-voltage networks with high reliability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: How can I test the relay during maintenance?\u003c\/strong\u003e\u003cbr\u003eA4: The relay includes built-in testing functions that simplify commissioning and routine checks.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":42581207023706,"sku":"REJ603BB401NN31E","price":258.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/REJ603BB401NN31E2.jpg?v=1763714016","url":"https:\/\/www.plcmasters.com\/products\/abb-rej603bb401nn31e-feeder-protection-relay","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}