{"product_id":"abb-reb-103-legacy-high-speed-busbar-protection-relay","title":"ABB REB 103 Legacy High-Speed Busbar Protection Relay","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB REB103\u003c\/strong\u003e is a legacy high-speed busbar protection relay engineered for \u003cstrong\u003e500 kV transmission substations\u003c\/strong\u003e. Part of ABB’s \u003cstrong\u003eRADSS (Redundant Analog Digital Substation System)\u003c\/strong\u003e family, it delivers fast and secure differential protection using analog current comparison and digital tripping logic. Designed for multi-section busbar systems, the REB103 ensures high reliability and operational flexibility in critical grid environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Type:\u003c\/strong\u003e Busbar differential (high impedance ratio-based)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElement Response Time:\u003c\/strong\u003e ≤1 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Protection Time:\u003c\/strong\u003e 6–9 ms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCT Supervision:\u003c\/strong\u003e Open-circuit detection and mismatch compensation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Logic:\u003c\/strong\u003e Dual trip circuit support, no composite voltage blocking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003ePanel \u0026amp; Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBay Capacity:\u003c\/strong\u003e Up to 12 bays per unit, expandable via auxiliary modules\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e IN SEVERE, TRIP, OPEN CT ALARM, START, DIFF, BLOCK (LEDs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Buttons:\u003c\/strong\u003e BLOCK (manual lockout), RESET (manual reactivation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Flush panel or 19\" rack-mounted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eEnvironmental Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e –25°C to +55°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e –40°C to +70°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5% to 95% RH (non-condensing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Switzerland\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFunctional Highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-speed analog differential protection for busbar faults\u003c\/li\u003e\n\u003cli\u003eRedundant architecture (I \u0026amp; II) ensures fault tolerance and system availability\u003c\/li\u003e\n\u003cli\u003eCompatible with shared CTs and integrated breaker failure protection\u003c\/li\u003e\n\u003cli\u003eManual reset after fault or block condition for operator assurance\u003c\/li\u003e\n\u003cli\u003eLED diagnostics for real-time visualization of faults and relay status\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":42424637096003,"sku":"REB103","price":300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/5810\/3107\/files\/REB103.png?v=1752562710","url":"https:\/\/www.plcdcspro.com\/products\/abb-reb-103-legacy-high-speed-busbar-protection-relay","provider":"PLC DCS Pro Ltd.","version":"1.0","type":"link"}