Technical Specifications Multi‑level over‑current, earth‑fault and directional protection functions. Configurable analog input, binary input and binary output channels. Compatible with IEC61850, Modbus, IEC60870‑5‑103 communication protocols. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 12.1 W. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP40, rear terminal area IP20. CE and IEC standard certifications are available.
Functional Features Provides instantaneous and time‑delay over‑current, directional earth‑fault protection for distribution feeders. Measures current, voltage, power and energy parameters. Collects circuit‑breaker and disconnector position signals. Supports local and remote switchgear trip‑close control. Stores sequence‑of‑event records and disturbance waveforms. Front‑panel man‑machine interface realizes local parameter configuration and status browsing. LED indicators display power, running, trip and alarm information. Built‑in hardware self‑diagnosis monitors internal component status.
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 automation projects with special I/O configuration requirements.
Installation Requirements Fix device firmly inside medium‑voltage switchgear cabinet. Connect auxiliary power supply within rated voltage scope. Complete CT, VT and binary‑loop wiring strictly per engineering schematic. Connect communication cables for remote monitoring function. Download protection setting and project configuration files via supporting engineering software. Implement protective grounding complying with power industry standards. Check front‑panel LED working state after power‑on.
Usage Notes Take anti‑static protection before touching internal circuit assemblies. Strictly observe high‑voltage safety specifications for CT and VT secondary circuit work.
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