Technical Specifications Multi‑channel analog current‑voltage input, binary status input channels, 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%. Built‑in motor start‑up record and fault disturbance recording storage.
Functional Features Samples motor loop secondary current and voltage signals in real‑time. Executes overload protection, locked‑rotor protection, phase unbalance protection, earth‑fault protection and other motor‑oriented protection functions. Outputs relay contact trip command for motor protection action. Supports local parameter configuration and status indication on front‑panel HMI. Uploads measurement data, motor start records and protection fault events to upper industrial monitoring system. Front‑panel LED indicators display device running, protection activation and fault alarm state. Built‑in comprehensive self‑diagnosis detects analog sampling channels, binary I/O and internal hardware circuit abnormalities.
Application Scenarios Spare numerical motor protection IED for medium‑voltage motor bay of industrial plant. Widely used in chemical, metallurgy and power‑plant motor control cabinet maintenance.
Performance Parameters Accurate motor thermal overload calculation performance. Fast motor‑fault protection response speed. Reliable motor start‑up and fault‑event recording capability.
Material Composition Metal industrial‑grade housing. Internal main processing board, analog sampling board, binary input‑output assembly and front‑panel human‑machine interface.
Structural Characteristics Standard cabinet‑panel embedded mounting structure. Front side integrates display unit, operation keys and multi‑group status LED indicators. Rear section arranges multi‑group secondary wiring terminals.
Working Principle After power‑on self‑diagnosis, REM543CG212AAAA continuously samples secondary current and voltage signals of motor loop. Motor protection logic and thermal model calculation run cyclically.
Installation Requirements Restore auxiliary power supply, download motor protection setting parameters, verify electrical measurement reading, protection logic action and remote data upload function.
Usage Notes Avoid current transformer secondary open‑circuit during wiring operation. Hot‑plug under powered condition is prohibited. Verify motor thermal protection setting after commissioning.
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