Technical Specifications Multi‑stage over‑current, earth‑fault, directional and negative‑sequence protection function sets. Configurable analog input, binary input and binary output channels. Supports IEC61850, Modbus TCP, IEC60870‑5‑103 communication protocols. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 13.2 W. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel protection grade IP40, rear terminals IP20. CE and IEC standard certifications are applicable.
Functional Features Provides comprehensive protection for medium‑voltage distribution feeders. Measures current, voltage, active power, reactive power and cumulative energy. Collects primary switchgear auxiliary contact signals, realizes local and remote circuit‑breaker control. Stores sequence‑of‑event logs and high‑resolution disturbance waveforms. Front‑panel HMI supports on‑site parameter setting and status browsing. LED indicators reflect power supply, running, trip and alarm status. Built‑in hardware self‑diagnosis monitors internal component operating status continuously.
Application Scenarios Placed inside medium‑voltage switchgear cabinet. Applied for feeder protection and control in public utility substations and heavy‑industry power distribution systems. Suitable for medium‑voltage distribution automation projects with high‑reliability requirements.
Performance Parameters Protection operation speed conforms to medium‑voltage power distribution protection standards. Disturbance recorder captures transient fault waveform data. Event log provides millisecond‑accurate time stamps. Measurement accuracy meets industrial distribution monitoring specifications. Hardware abnormalities trigger dedicated alarm output.
Installation Requirements Secure device firmly inside medium‑voltage switchgear cabinet. Connect auxiliary power supply within rated operating voltage scope. Wire CT, VT and binary loops strictly following engineering schematic drawings. Deploy communication cables for remote monitoring function. Download protection settings and project configuration files by supporting engineering software. Complete protective grounding complying with power industry standards. Inspect front‑panel LED working state after power‑on.
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