{"product_id":"abb-rej603-rej603bb401nn3xe","title":"ABB REJ603 REJ603BB401NN3XE Protection Relay","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\u003eis a specialized member of the REJ603 family, designed to act as a robust sentinel for power feeders. Its defining characteristic is its ability to operate independently of any auxiliary power supply, deriving the necessary energy directly from the current transformers (CTs). \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eABB\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eREJ603BB401NN3XE\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeeder Protection (Overcurrent and Earth Fault)\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 via CT inputs (No batteries required)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProtection Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eShort-circuit detection and Earth-fault isolation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelectivity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAdvanced algorithms to differentiate between local and upstream faults\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBrand New with Original Factory Packaging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e12 Months\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGermany\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features \u0026amp; Engineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelf-Powered Sentinel:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBy drawing energy from the primary current transformers, this relay simplifies installation and eliminates the failure points associated with external power supplies or batteries.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShort-Circuit Slayer:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEngineered to detect and isolate overcurrents and earth faults with extreme speed, the relay minimizes equipment damage and reduces system downtime.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEarth Fault Champion:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIt features specialized algorithms designed to target earth faults with high precision, ensuring reliable tripping even in electrically noisy industrial environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelective Shielding:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe REJ603BB401NN3XE is designed for selective coordination, ensuring it only clears faults within its specific feeder zone to prevent unnecessary wide-scale outages.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRugged Defender:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis unit is built to withstand extreme temperatures, mechanical vibrations, and shocks, making it a dependable choice for the most challenging field locations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":46799735947454,"sku":"REJ603 REJ603BB401NN3XE","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_11-17-47_0c6a995d-9514-4494-a055-6df7b5475b67.png?v=1778211376","url":"https:\/\/www.autooiltech.com\/products\/abb-rej603-rej603bb401nn3xe","provider":"AutoOilTech Limited","version":"1.0","type":"link"}