Technical Data Parameter Specification Product Type Electronic Trip Unit / Protection Relay Manufacturer Series ABB Micrologic Core Product Code / Article Number PR211/P-LI Mounting Version Plug-in (P) – For easy field replacement on compatible ABB breakers (e.g., Emax 2 E1.2-E2.2, Tmax XT). Protection Functions L - Long-Time (Overload): Adjustable current setting (Ir) and time delay (tr). I - Instantaneous (Short-Circuit): Adjustable current threshold (Ii). Rated Power Supply Typically powered from the breaker's internal Current Transformers (CTs) – CT-powered. No external auxiliary supply required for basic protection. Display & Interface Basic LED indicators for status (Ready, Tripped, Alarm). No large digital display. Settings are made via rotary dials/switches under a transparent cover. Communication Capability None. This is a standalone protection unit. For communication (e.g., Modbus, Profibus), the PR212 or PR213 series with "E" or "H" variants would be required. Protection Curves Pre-defined curves compliant with IEC 60947-2 and IEEE/ANSI C37 standards. Selectable curve types (e.g., IEC Curve A). Setting Ranges (Typical) Long-Time (Ir): Adjustable from 0.4 to 1 x In (where In is the breaker's rated current). Instantaneous (Ii): Adjustable from 2 to 15 x Ir. Standards Compliance IEC 60947-2, UL 489, CCC, and other international standards. Ambient Temperature -25°C to +70°C (for operation) Compatible Breaker Families • Emax 2 (Air Circuit Breakers) – Specific frame sizes. • Tmax XT (Molded Case Circuit Breakers) – Specific frame sizes. (Must verify compatibility with exact breaker catalog number). Key Differentiator Offers the essential "core" protection functions in a reliable, cost-effective, and easy-to-use package. The plug-in design ensures future upgradeability.