GE 239-RTD-AN Motor Protection Relay

Technical Specifications:

  • Supported RTD Types: Nickel, platinum, or copper (e.g., Pt100, Pt1000, Ni120)
  • Temperature Measurement Range: -200°C to +850°C (depending on RTD type)
  • Accuracy: ±0.1% of full scale (typical), ±0.5°C or better within -50°C to +200°C
  • Resolution: 16-bit
  • Wiring Configurations: 2-wire, 3-wire, or 4-wire (configurable to eliminate lead resistance errors)
  • Control Power Input: 90 to 300VDC
  • Communication Protocol: Modbus RTU
  • Display: Clear LCD for status, current, and temperature readings
  • Environmental Rating: Suitable for harsh industrial conditions (conformal coating available for additional protection)
  • Certifications: CSA/UL certified
Category:
Description

Functional Characteristics:

  • Comprehensive Motor Protection:
    • Overload protection (15 selectable curves)
    • Short circuit protection
    • Rotor locking protection
    • Stalling/mechanical jam protection
    • Repeated starts protection (Model 505)
    • Single-phasing/unbalance protection
    • Ground fault protection
    • Over-temperature protection (thermistors and up to 3 RTDs)
    • Undercurrent protection
    • Overload warning
    • Breaker failure detection
  • Diagnostics and Monitoring:
    • Fault diagnosis and trip history logging
    • Thermal capacity and load percentage display
    • Motor runtime hours tracking
    • Maximum current during last start recording
  • Outputs and Interfaces:
    • Programmable outputs for thermal capacity, load percentage, and phase current
    • Trip/alarm/auxiliary/service relay outputs
    • 4-20 mA motor current output for PLC interfaces
    • RS485 Modbus communication for remote monitoring and control
  • User-Friendly Features:
    • Simple programming and operation
    • Simulation mode for field testing
    • Memory lockout to prevent unauthorized changes

Application Scenarios:

  • Industrial Motor Control: Protects motors in factories, ensuring continuous operation and minimizing downtime due to process-related issues.
  • Pump Systems: Provides mechanical protection by detecting suction loss or closed discharge valves using undercurrent functions.
  • Fan Systems: Monitors airflow loss in mines or steam boilers, preventing damage due to mechanical jamming.
  • Compressor Systems: Uses startup timers to protect motors from prolonged operation with open outlets.
  • General Mechanical Equipment: Safeguards gears, pumps, fans, sawmills, and compressors from mechanical failures.
  • Hazardous Environments: Ensures personnel safety by detecting winding moisture or short circuits through ground fault protection.
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