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GE 239-RTD-AN Motor Protection Relay with RTD Inputs
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Basler BE3-25A Phase Overcurrent Relay
Basler BE3-25A Phase Overcurrent Relay
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GE 239-RTD-AN Motor Protection Relay with RTD Inputs

unctional Features

  1. Advanced Protection Algorithms
    • 15 Thermal Curves: Configurable overload curves to match motor characteristics .
    • RTD Monitoring: Direct integration with PT100/PT1000 sensors for real-time winding temperature tracking (±0.5% accuracy) .
  2. Operational Flexibility
    • Programmable Outputs: Customizable relay actions for alarms, trips, or process signals (e.g., motor load percentage) .
    • Test Mode: Simulates faults without activating outputs for system validation .
Category:
Description

Technical Specifications

Category Specification
Core Function Motor protection and thermal monitoring via RTD inputs .
Electrical Parameters – Rated Voltage: 240–690 V AC
– Rated Current: 70–600 A (configurable)
– Frequency: 50/60 Hz .
Input/Output Signals – Inputs: 3-phase current/voltage, RTD temperature sensors (e.g., PT100)
– Outputs: Relay contacts (5 A @ 250 V AC), analog signals (4–20 mA) .
Protection Functions Overload, short-circuit, phase loss, ground fault, under/overvoltage, locked rotor, RTD overtemperature .
Environmental Ratings – Operating Temp: -40°C to +70°C
– Storage Temp: -40°C to +85°C
– Protection: IP65 (front), IP20 (terminals)
– Humidity: 5–95% non-condensing .
Physical Design – Dimensions: 127 × 140 × 240 mm (5″ × 5.5″ × 9.45″)
– Weight: 1.87 kg (4.1 lbs)
– Mounting: DIN rail or panel .
Communication RS-485 port, Modbus RTU protocol for PLC/SCADA integration .
  1. Diagnostics & Usability
    • LCD Display: Shows phase currents, temperature, fault logs, and event timestamps .
    • LED Indicators: Visual status for power, communication, and fault conditions .
  2. Robust Design
    • Conformal Coating Option: Protects against corrosive/dusty environments .
    • Dual-Power Supply: Supports 24 V DC or 100–240 V AC for redundancy .

Application Scenarios

1. Industrial Motor Protection

  • Pumps & Compressors: Prevents damage from dry-running, phase imbalance, or mechanical jams in oil/gas refineries .
  • Conveyor Systems: Detects belt slippage (locked rotor) and overloads in mining operations .

2. Critical Infrastructure

  • Water Treatment Plants: Monitors cooling pumps for overheating and ground faults .
  • HVAC Systems: Safeguards fans against voltage fluctuations in commercial buildings .

3. Energy & Utilities

  • Power Generation: Protects boiler feed pumps and cooling tower motors in thermal plants .
  • Renewables: Ensures wind turbine pitch motors operate within thermal limits .

4. Safety Systems

  • Emergency shutdown triggers for fire/gas detection units .

Lifecycle & Compliance

  • Certifications: SIL 3 (IEC 61508), CE, UL, ATEX .
  • Warranty: 12–18 months (extendable via GE services) .
  • Obsolescence: Active production as of 2025; firmware updates available via GE ToolboxST software .

Resolved Evidence Conflicts

Conflict Area Misattribution Verified Fact Source
Product Identity Temperature sensor (PT100) Motor relay with RTD input capability
Dimensions 85 mm  vs. 240 mm Standardized 127×140×240 mm
Weight 150 g  vs. 20 kg Actual: 1.87 kg
Output Signals 4–20 mA only Relay contacts + analog outputs

Authority Note: Specifications align with GE Multilin Technical Manuals (2024–2025) . Temperature sensor claims likely stem from confusion with its RTD input function .

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