Technical Specifications Multi‑level over‑current, earth‑fault and directional protection function library. Custom‑configured analog input, binary input and binary output channels. Supports IEC61850, Modbus, IEC60870‑5‑103 communication protocols. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 12 W. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP40, rear terminal‑side IP20. Meets CE and IEC standard requirements.
Functional Features Executes multi‑stage over‑current and directional earth‑fault protection for medium‑voltage distribution feeders. Realizes multi‑electrical‑quantity measurement and primary equipment status acquisition. Supports local and remote control of circuit‑breakers and disconnectors. Saves fault event records and disturbance waveform data. Front‑panel man‑machine interface supports on‑site parameter configuration and status viewing. LED indicators reflect power, running, trip and alarm conditions. Built‑in hardware self‑diagnosis detects internal abnormalities and outputs alarm signals.
Application Scenarios Placed inside medium‑voltage switchgear cabinet. Used for feeder protection and control of utility and industrial medium‑voltage power distribution systems. Suitable for distribution projects requiring special I/O channel allocation.
Performance Parameters Protection response time satisfies medium‑voltage power grid protection standards. Disturbance recorder captures fault transient sampling data. Event log supports millisecond‑level time‑stamp recording. Measurement accuracy meets power distribution monitoring specifications. Hardware faults generate definite alarm output.
Installation Requirements Fix device firmly inside medium‑voltage switchgear cabinet. Connect auxiliary power supply strictly within rated voltage scope. Complete CT, VT and binary‑loop wiring in accordance with engineering schematic drawings. Connect communication cables for remote monitoring function. Download protection settings and project configuration files through supporting engineering software. Implement reliable protective grounding complying with power industry standards. Verify front‑panel LED working status after power‑on.
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