Technical Specifications: Measurement Object: Three‑phase AC motor current, voltage, power and temperature signals Protection Function: Overload, short‑circuit, ground fault, phase unbalance, phase loss, stall protection Input Signal: Current transformer input, voltage transformer input, RTD temperature sensor input Communication Interface: RS‑485 Modbus communication port Power Supply: Wide‑range AC/DC universal power supply Operating Temperature: ‑40°C to +85°C Storage Temperature: ‑40°C to +85°C Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: Standard panel‑mount housing Certifications: UL, CE, IEC motor protection equipment compliance standards
Functional Features: Full‑range motor electrical and thermal protection function for motor fault prevention. Real‑time measurement of motor running electrical parameters and temperature data. Built‑in event record and fault wave‑form capture function for accident analysis. Modbus communication realizes data uploading to upper monitoring system and remote parameter setting. Front‑panel local human‑machine interface for on‑site parameter configuration and status viewing. Self‑diagnosis function monitors internal hardware and sensor input circuit health status. Supports user‑configurable protection threshold and action logic.
Structural Characteristics: Standard panel‑mount housing structure, suitable for cabinet front‑panel installation. Front‑panel LCD display, operation buttons and LED status indicator lamps. Rear‑side terminal blocks for CT, VT, RTD sensor, power supply and communication wiring. Metal housing with dust‑proof and anti‑interference capability. Internal hardware modular design.
Working Principle: Current and voltage signals from CT/VT sensors are sent into relay rear‑side terminals. Internal acquisition circuit samples motor operating electrical quantity. RTD channel collects motor winding temperature signal. Protection logic unit compares real‑time measured value with user‑set threshold.
Installation Requirements: Carry out panel‑mount installation according to product outline dimension, fix relay firmly on cabinet front panel. Complete CT, VT, RTD sensor, power‑supply and communication wiring strictly follow wiring diagram.
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