Technical Specifications Three‑phase current and voltage measurement inputs, abundant digital input channels, multi‑form relay output contacts, P1 communication interface. Built‑in motor thermal model, supports multi‑channel RTD sensor access. Operating ambient temperature ‑20 ℃ to +65 ℃, storage temperature ‑40 ℃ to +85 ℃, relative humidity 5%‑95% non‑condensing. Front‑panel LCD display and man‑machine operation keypad.
Functional Features Realizes overload, locked‑rotor, phase unbalance, phase loss, ground fault, under‑current and motor jam protection. Receives RTD signals for motor winding and bearing temperature monitoring. Captures fault snapshot, start‑up log and trend data. Completes three‑phase electrical parameter metering. Supports local manual operation and remote control command via industrial communication. Provides configurable alarm and trip output logic.
Application Scenarios Critical motor protection equipment used in power plant auxiliary systems, petrochemical plants, mining industry and heavy‑duty motor control centers.
Performance Parameters High‑accuracy electrical quantity sampling, rich configurable protection time‑delay curves, large‑capacity historical data storage, stable communication data interaction capability.
Material Composition Flame‑retardant engineering plastic enclosure. Main CPU processing board, analog signal conditioning circuit, relay output assemblies. Front‑panel LCD and keypad assembly. Screw‑type field wiring terminal blocks. Metal panel mounting clips.
Structural Characteristics Front panel integrates LCD display, status LED indicators and operation push‑buttons. Rear side concentrates CT/PT signal terminals, digital I/O terminals and communication interface terminals. Mounting clips fix the relay inside cabinet door cut‑out.
Working Principle Internal processor samples electrical data, calculates motor thermal accumulation and compares measured values against protection setting thresholds.
Installation Requirements Install relay into cabinet panel cut‑out and fasten mounting clips. Complete CT, PT, digital input‑output wiring strictly follow official schematic drawing. Connect communication cable as required. Power on device, configure motor parameters and protection setting values, carry out function verification test.
Usage Notes CT secondary circuit must avoid open‑circuit operation.
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