GE SR469‑P5‑HI‑A20‑T Motor Management Relay

Technical Specifications Module Type: Multifunction Motor Management & Protection Relay Applicable System: Power‑Plant Auxiliary‑Motor and Industrial Heavy‑Duty Motor Control System Measurement Input: Motor‑circuit CT current‑transformer inputs Protection Functions: Overload, locked‑rotor, phase‑unbalance, phase‑loss, over‑current, ground‑fault protection Communication Interface: Serial data‑communication port for upper‑level monitoring‑system connection Power Supply: Auxiliary AC/DC operating power supply Operating Temperature: ‑20 ℃ to +65 ℃ Storage Temperature: ‑40 ℃ to +85 ℃ Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: Standard cabinet‑panel‑mount housing Certifications: CE, UL motor‑protection‑relay compliance

Functional Features Comprehensive multi‑dimension protection suite for AC motor: overload thermal protection, locked‑rotor starting‑fault protection, phase‑unbalance and phase‑loss protection, over‑current and ground‑fault protection. Measures motor operating‑current and other key electrical parameters in real‑time. Internal fault‑event memory stores motor‑fault history records for post‑fault analysis. Front‑panel local display screen and operation‑setting buttons for parameter configuration and real‑time‑value browsing. Front‑panel LED status indicators visualize relay operating and protection‑trip status.

Application Scenarios Comprehensive protection and condition‑monitoring for power‑plant auxiliary‑system large AC drive motors. Protection‑relay application for heavy‑duty industrial motor control cabinets. Spare‑part replacement for legacy GE motor‑management‑relay installations.

Structural Characteristics Standard panel‑mount combined metal‑plastic relay housing. Front‑panel liquid‑crystal display, setting‑operation buttons and status LED indicator group. Rear‑side screw‑type terminal blocks for CT‑measurement‑input, auxiliary‑power‑supply, trip‑contact‑output and communication‑signal wiring. Internal current‑signal sampling circuit, protection‑logic processor and fault‑event memory components. Panel‑mount clamping fixture for securing relay through cabinet‑panel cut‑out opening.

Working Principle Motor‑loop current signals from current transformers are fed into SR469‑P5‑HI‑A20‑T relay measurement‑input terminals. Internal sampling circuit converts analog current signals into digital data. Relay calculates motor operating condition variables and compares against user‑configured protection setting thresholds.

Installation Requirements Mount relay through standard cabinet‑panel cut‑out opening and fasten with panel‑mount fixture. Complete CT‑secondary‑circuit wiring, auxiliary‑power‑supply wiring, trip‑contact‑output wiring and communication‑port wiring strictly according to GE official wiring diagram.