{"product_id":"abb-rej603-bb401nn31e-self-powered-feeder-protection-relay","title":"ABB REJ603 BB401NN31E Self-Powered Feeder Protection Relay","description":"\u003cp\u003eConfigured for selective short-circuit and earth-fault protection in secondary distribution networks, the \u003cstrong\u003eABB REJ603BB401NN31E\u003c\/strong\u003e (\u003cstrong\u003eREJ603\u003c\/strong\u003e Self-Powered Feeder Protection Relay) provides direct physical\/electrical execution.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eREJ603 REJ603BB401NN31E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e~0.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 160 x 96 x 150 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eStandard switchgear operating thermal boundaries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSelf-powered via current transformers (CT input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStartup Power Requirement\u003c\/td\u003e\n\u003ctd\u003eApprox. 2.5 VA at rated current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Functions\u003c\/td\u003e\n\u003ctd\u003ePhase overcurrent, earth-fault protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Frequency\u003c\/td\u003e\n\u003ctd\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Current\u003c\/td\u003e\n\u003ctd\u003eConfigurable 1 A \/ 5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Output\u003c\/td\u003e\n\u003ctd\u003e1 NO (normally open) contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBinary I\/O\u003c\/td\u003e\n\u003ctd\u003e1 DI \/ 1 DO configurable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Interface\u003c\/td\u003e\n\u003ctd\u003eLED indicators and DIP switch configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEvent Recording\u003c\/td\u003e\n\u003ctd\u003eInternal storage up to 100 fault records\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control and Drives Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe REJ603BB401NN31E hardware platform integrates with backplane bus communication velocity Licences to maintain deterministic internal timing structures. The module interfaces seamlessly across Profinet \/ EtherNet\/IP deterministic networks via dedicated external communication links to facilitate remote data capture while maintaining localized independent fault isolation. The embedded microcontroller firmware ensures total hardware-to-firmware flash compatibility across the wider Relion 600 series platform, ensuring that local digital logic execution operates within fixed, low-latency parameters. High-density scaling allows the physical housing to support the 1 DI \/ 1 DO binary matrix alongside the core protection hardware without increasing the operational footprint inside compact ring main units.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the relay execute a trip sequence if there is no external auxiliary power supply connected?\u003c\/p\u003e\n\u003cp\u003eA: The relay derives its operational energy directly from the main current transformer sensing loops. Once the line current reaches the minimum 2.5 VA startup power requirement, the internal power conditioning circuit energizes the microprocessor and charges a storage capacitor to drive the 1 NO trip output contact when a fault is validated.\u003c\/p\u003e\n\u003cp\u003eQ: What are the hardware configuration limitations for adjusting the protection pickup thresholds?\u003c\/p\u003e\n\u003cp\u003eA: Threshold parameters and inverse time delay curves must be set manually using the integrated front-panel DIP switches. This mechanical interface eliminates the need for field computer connections and enforces configuration persistence regardless of total power loss intervals.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":47603386482878,"sku":"REJ603 BB401NN31E","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_fad6570a-15d9-42da-8bbc-b0d79521ec97.png?v=1780559028","url":"https:\/\/www.autooiltech.com\/products\/abb-rej603-bb401nn31e-self-powered-feeder-protection-relay","provider":"AutoOilTech Limited","version":"1.0","type":"link"}