Technical Specifications Multi‑stage over‑current and earth‑fault protection function library. Analog input channels for current and voltage sampling. Binary input and binary output channels for signal collection and control output. Supports standard industrial communication protocols. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 11.5 W. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel protection IP40, rear side IP20. Certifications include CE, IEC standard compliance.
Functional Features Executes instantaneous and time‑delay over‑current, directional earth‑fault protection for medium‑voltage distribution feeder. Measures current, voltage, power and energy values. Collects circuit‑breaker and disconnector position signal, supports local and remote switch control. Stores fault event sequence and disturbance waveform records. Front‑panel man‑machine interface supports local status check and parameter setting. LED indicators display power, running, trip and alarm condition. Built‑in hardware comprehensive self‑diagnosis function.
Application Scenarios Mounted inside medium‑voltage switchgear cabinet. Applied for feeder protection and control in utility distribution substation and industrial plant medium‑voltage power system. Suitable for medium‑voltage distribution project with specific hardware channel configuration requirement.
Working Principle After power‑on, REF610C11LCLR completes hardware self‑diagnosis. CT and VT secondary signals enter signal sampling unit. Protection algorithm continuously compares real‑time electrical quantity with protection setting value.
Installation Requirements Secure IED inside medium‑voltage switchgear cabinet. Connect auxiliary power supply complying with rated operating voltage range. Complete CT, VT, binary input‑output wiring strictly per engineering schematic drawing. Connect communication cable if remote monitoring function is required. Download protection setting and application configuration by supporting engineering software.
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