{"product_id":"abb-reb670-1mrk004822-bb-busbar-differential-protection","title":"ABB REB670 1MRK004822-BB Busbar Differential Protection","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB REB670 1MRK004822-BB\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a premium Intelligent Electronic Device (IED) designed for high-speed, selective\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebusbar differential protection\u003c\/strong\u003e. It offers exceptional flexibility for various wiring configurations, including double busbar and one-and-a-half circuit breaker arrangements.\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 Number:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eREB670 1MRK004822-BB.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Series:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRelion 670.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFunction:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBusbar Differential Protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCT Inputs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSupports 4 to 24 inputs (Three-phase or Split-phase configurations).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Speed:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTypical 12 ms trip time for in-zone faults.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Support:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSingle\/Double busbar, Bypass busbar, 1.5 Breaker, and Double Breaker.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLogic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBuilt-in dynamic zone automatic selection based on disconnector status.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCommunication:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFully IEC 61850 compliant.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features and Engineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Zone Selection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFeatures a built-in \"image\" of the busbar status. By monitoring disconnector positions, it dynamically assigns CTs to the correct protection zone, eliminating the need for complex external switching relays.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Stability Against CT Saturation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEmploys a unique measurement principle that remains stable even during severe CT saturation caused by heavy external faults, preventing nuisance trips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCost-Efficient CT Requirements:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike high-impedance schemes, the REB670 has lower requirements for the main CT and can share CT cores with other protection devices, reducing overall project costs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIntegrated CT Supervision:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eContinuously monitors the CT secondary circuits for open circuits. If a break is detected, the unit blocks the protection to prevent a false trip and triggers an alarm and waveform recording.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSelective Breaker Failure Tripping:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrates breaker failure protection that works in tandem with the bus differential logic to isolate only the faulted section of the switchyard.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Circuitry:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBy handling zone selection and trip logic internally via software, it eliminates the need for extensive traditional hard-wiring for bus protection trip switching.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":46985801826494,"sku":"REB670 1MRK004822-BB","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-05-11_11-18-53_38fd05c3-3ea9-413b-a40f-47cb6a2b1fbd.png?v=1778470966","url":"https:\/\/www.autooiltech.com\/products\/abb-reb670-1mrk004822-bb-busbar-differential-protection","provider":"AutoOilTech Limited","version":"1.0","type":"link"}