Technical Specifications Three‑phase current and voltage measurement inputs, multi‑channel digital inputs, relay output contacts, P5 communication interface. Operating ambient temperature ‑20 ℃ to +65 ℃, storage temperature ‑40 ℃ to +85 ℃, relative humidity 5%‑95% non‑condensing. Front‑panel LCD display and operation keypad.
Functional Features Provides over‑current, earth‑fault, over‑voltage, under‑voltage, phase unbalance protection for power distribution feeder. Records fault snapshot, feeder operation event logs and trend data. Measures three‑phase electrical parameters of distribution circuit. Supports local manual operation and remote control command via industrial communication. Configurable alarm and trip output logic.
Application Scenarios Feeder protection and monitoring equipment for power substation, industrial power distribution system and plant‑internal power supply network.
Performance Parameters High‑precision electrical measurement accuracy, multiple configurable protection time‑delay curves, large‑capacity fault event storage, stable communication data exchange performance.
Material Composition Flame‑retardant engineering plastic enclosure. Main CPU processing circuit board, power signal conditioning modules, relay output assemblies. Front‑panel LCD display and keypad parts. Screw‑type field wiring terminal blocks. Metal panel mounting clip accessories.
Structural Characteristics Standard panel‑mount housing structure. 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.
Working Principle Internal processor samples electrical data and executes feeder protection algorithm calculation. Fault and runtime data can be stored locally or uploaded to upper‑level power monitoring SCADA system.
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. Power‑on device, configure feeder protection setting values, carry out function verification test.
Usage Notes CT and PT secondary circuits must strictly avoid open‑circuit risk. Shielded cables shall be adopted for communication wiring. Protection setting parameters shall match actual power distribution feeder operating condition.
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