Technical Specifications Complete motor‑oriented protection function including overload, locked‑rotor, phase unbalance, earth‑fault and over‑voltage protection. Analog input channels for motor current and voltage sampling. Binary input for auxiliary contact signal collection, binary output for trip and control output. Communication interface supported. Auxiliary power supply 80‑250 V DC / 85‑265 V AC. Typical power consumption 13 W. Operating temperature ‑25 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel protection IP40, rear side IP20. Certifications include CE and IEC standard compliance.
Functional Features Implements multi‑dimensional protection for medium‑voltage motor against overload, locked rotor, phase loss, phase unbalance and earth‑fault. Measures motor operating current, voltage, power and running hours. Collects circuit‑breaker and isolating switch position signal. Supports local and remote motor start‑stop control. Records motor fault events and operation history. Front‑panel display and keys realize local status check and parameter modification. LED indicators show power, running, trip and alarm condition. Built‑in hardware self‑diagnosis monitors relay internal status.
Application Scenarios Mounted in medium‑voltage motor switchgear cabinet. Protects medium‑voltage driving motor used in pump, fan, compressor and conveyor equipment. Widely deployed in petrochemical, power plant, water‑treatment, mining and heavy‑manufacturing industry. Used for new‑build and retrofit medium‑voltage motor control project.
Installation Requirements Secure relay inside medium‑voltage motor switchgear cabinet. Connect auxiliary power supply within rated voltage operating range. Wire CT, VT secondary circuit, binary input and output wiring strictly according to schematic drawing. Connect communication cable if remote monitoring is required. Download motor protection setting parameters by supporting configuration tool. Complete protective grounding complying with power system specification. Verify front‑panel LED indication after power‑on.
Usage Notes Apply anti‑static protection measure before touching internal circuit assemblies. Comply with high‑voltage safety rules during CT and VT secondary circuit work. Do not disassemble relay under powered condition.
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