Technical Specifications Complete feeder protection function library including over‑current and earth‑fault protection. Configurable analog input, binary input and binary output channels. Supports IEC61850, Modbus and IEC60870‑5‑103 communication protocols. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 12.3 W. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP40, rear side IP20. Complies with CE and IEC standards.
Functional Features Implements multi‑stage over‑current and directional earth‑fault protection for medium‑voltage feeders. Realizes multi‑electrical‑quantity measurement and primary equipment status acquisition. Supports local and remote control of circuit‑breakers and disconnectors. Records fault events and disturbance waveform data. Front‑panel HMI supports on‑site parameter modification and status check. LED indicators reflect power, operation, trip and alarm conditions. Built‑in hardware self‑diagnosis monitors internal operating status continuously.
Application Scenarios Installed inside medium‑voltage switchgear cabinet. Used for feeder protection and control in public utility substations and industrial plant power systems. Applied in distribution projects requiring customized I/O channel allocation.
Installation Requirements Fasten device inside medium‑voltage switchgear cabinet. Connect auxiliary power supply within rated operating range. Wire CT, VT and binary loops strictly following engineering schematics. Deploy communication cables for remote monitoring. Download protection settings and project configuration by engineering tool. Complete protective grounding according to power industry specifications. Verify LED indication status after power‑on.
Usage Notes Apply anti‑static protection measures before contacting internal circuit boards. Comply with high‑voltage safety rules for CT and VT secondary circuit operations. Disassembly under powered state is prohibited. Periodically inspect terminal tightness and verify protection settings.
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