Technical Specifications Three‑phase low‑level current and voltage measurement inputs, multiple digital input channels, relay output contacts, P5 communication interface. Supports multi‑channel RTD temperature sensor access. 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 generator overload, over‑current, over‑voltage, under‑voltage, reverse power, phase unbalance and ground fault protection. Monitors generator temperature status via RTD sensors. Stores fault snapshot, unit start‑stop events and operating trend data. Completes generator three‑phase electrical parameter metering. Supports local manual operation and remote control command via industrial communication. Configurable alarm and trip output logic.
Application Scenarios Generator protection unit for small generating sets equipped with low‑level secondary output instrument transformers, applied for distributed power stations and industrial backup power systems.
Performance Parameters Optimized low‑level signal sampling precision, generator‑oriented configurable protection curves, reliable fault data storage and stable communication data exchange capability.
Material Composition Flame‑retardant engineering plastic enclosure. Main CPU processing circuit board, dedicated low‑level 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. Front panel integrates LCD display, status LED indicators and operation push‑buttons. Rear side concentrates low‑level CT/PT input terminals, digital I/O terminals and communication interface terminals. Mounting clips fix relay into cabinet door cut‑out opening.
Working Principle Internal conditioning circuit processes weak signals, processor samples electrical data and executes generator protection algorithm calculation.
Installation RequirementsInstall relay into cabinet panel cut‑out and fasten mounting clips. Connect communication and RTD field cables. Power‑on device, configure generator nameplate parameters and protection setting values, carry out function verification test.
Usage Notes Must match low‑level secondary output instrument transformers. CT and PT secondary circuits avoid open‑circuit risk.
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