Technical Specifications Rich‑channel analog current‑voltage input, binary input ports, multi‑group relay output contacts. Multiple communication interfaces. Auxiliary DC operating power supply. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Large‑capacity storage for motor start records and fault disturbance waveforms.
Functional Features Real‑time sampling of motor‑loop secondary current and voltage signals. Executes overload, locked‑rotor, under‑load, phase failure, earth‑fault and other comprehensive motor‑protection algorithms. Supports motor start‑up process monitoring and thermal state calculation. Outputs multi‑group relay contacts for trip and auxiliary control function. Supports local parameter setting and status browsing on front‑panel HMI. Uploads measurement values, motor start records, protection action events and fault waveforms to upper monitoring system. Front‑panel LED indicators reflect device running, protection trigger and fault alarm condition. Built‑in comprehensive hardware self‑diagnosis monitors sampling channels, binary I/O and internal circuit working status.
Application Scenarios Spare advanced motor protection IED for important medium‑voltage motor bay in heavy‑industry plant. Applied in chemical, mining and power‑plant motor protection cabinet maintenance and retrofitting.
Performance Parameters Precise motor thermal model calculation performance. Sensitive multi‑condition motor‑fault response capability. Large‑capacity motor operation history recording function.
Material Composition Metal heavy‑duty industrial housing. Internal high‑performance processing board, analog sampling unit, binary input‑output assembly and front‑panel HMI components. Rear‑side screw‑type wiring terminals for secondary signal, power and communication field wiring.
Structural Characteristics Cabinet‑panel embedded installation structure. Rear side provides multi‑group secondary wiring terminals.
Working Principle Multi‑motor‑protection logic and thermal model run cyclically. Motor operation data, start‑up records and fault waveforms are transmitted to upper‑level system through communication ports.
Installation Requirements Restore auxiliary power supply, download complete motor protection setting parameters, verify measurement reading, protection logic and remote data upload performance.
Usage Notes Strictly prevent CT secondary open‑circuit during wiring work. Hot‑plug under powered state is prohibited.
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