Technical Specifications Multi‑stage over‑current and earth‑fault protection function set. Analog input channels for current and voltage. Binary input and binary output channels for signal acquisition and control output. Supports multiple communication protocols. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 11 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 Provides instantaneous and time‑delay over‑current, directional earth‑fault protection for medium‑voltage feeder. Measures current, voltage, power and energy parameters. Collects primary switchgear position signal, supports local and remote circuit‑breaker control. Stores fault event records and disturbance waveform data. Front‑panel HMI supports local status viewing and parameter setting. LED indicators show power, running, trip and alarm condition. Built‑in hardware comprehensive self‑diagnosis function.
Application Scenarios Mounted inside medium‑voltage switchgear cabinet. Used for feeder protection and control in utility distribution substation and industrial plant power system. Applies to new‑build and upgrade medium‑voltage distribution automation projects.
Performance Parameters Protection operating time conforms to medium‑voltage distribution network protection requirement. Disturbance recorder captures fault waveform. Event log provides time‑stamped fault information. Self‑diagnosis outputs alarm signal for internal hardware failure. Measurement accuracy meets distribution monitoring requirement.
Installation Requirements Secure IED inside medium‑voltage switchgear cabinet. Connect auxiliary power supply complying with rated voltage operating range. Complete CT, VT, binary input‑output wiring strictly according to engineering schematic. Connect communication cable if remote monitoring function is needed. Download protection setting and application configuration through supporting engineering software. Complete protective grounding complying with power industry specification. Verify front‑panel LED indication after power‑on.
Usage Notes Adopt anti‑static protection before touching internal circuit assemblies. Strictly follow high‑voltage safety operation rule for CT and VT secondary circuit work.
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