Product Short Description
Technical Specifications
Manufacturer: GE Multilin
Part Number: 239-RTD-AN
Power Supply: 24 – 250 V AC/DC universal, 6 VA maximum
Insulation Voltage: 300 V AC
Fuse Rating: 5 × 20 mm, 250 V, 2.5 A
Current Inputs: 5 A or 1 A nominal (field-selectable)
RTD Inputs: Up to 8 three-wire or four-wire RTD channels, PT100 / CU10 selectable
Measurement Accuracy: ±1 % of display value for current and temperature
Trip Time Accuracy: ±1 % or ±40 ms, whichever is greater
Overload Curve: 10 selectable IEC / IEEE curves plus custom
Short-Circuit Trip Level: 1 – 11 × CT primary, adjustable
Description
Ground-Fault Trip Level: 0.02 – 1.0 × CT primary, adjustable
Locked-Rotor Protection: Configurable stall time and current threshold
Unbalance Delay: 0 – 60 s, adjustable
Storage Temperature: –40 °C to +70 °C
Operating Temperature: –25 °C to +65 °C
Humidity: 5 % – 95 % non-condensing
Protection Class: IP20 (front IP54 with gasket)
Mounting: DIN rail or panel, compact 96 mm × 48 mm cutout
Weight: 0.35 kg
Approvals: UL Listed, CSA Certified, CE marked
Locked-Rotor Protection: Configurable stall time and current threshold
Unbalance Delay: 0 – 60 s, adjustable
Storage Temperature: –40 °C to +70 °C
Operating Temperature: –25 °C to +65 °C
Humidity: 5 % – 95 % non-condensing
Protection Class: IP20 (front IP54 with gasket)
Mounting: DIN rail or panel, compact 96 mm × 48 mm cutout
Weight: 0.35 kg
Approvals: UL Listed, CSA Certified, CE marked
Functional Highlights
Integrates motor thermal protection, RTD-based temperature monitoring, and advanced fault diagnostics in one compact unit
Back-lit LCD display shows real-time phase currents, RTD temperatures, thermal capacity, and fault messages
Programmable analog output (4–20 mA or 0–10 V) retransmits any measured parameter to SCADA or DCS
Four programmable output relays: trip, alarm, auxiliary, and communication status
Modbus RTU (RS-485) and optional Ethernet (Modbus TCP) for remote monitoring and configuration
Waveform capture and event recorder (128 events, 1 ms resolution) assist post-fault analysis
Conformal coating option available for harsh environments
Integrates motor thermal protection, RTD-based temperature monitoring, and advanced fault diagnostics in one compact unit
Back-lit LCD display shows real-time phase currents, RTD temperatures, thermal capacity, and fault messages
Programmable analog output (4–20 mA or 0–10 V) retransmits any measured parameter to SCADA or DCS
Four programmable output relays: trip, alarm, auxiliary, and communication status
Modbus RTU (RS-485) and optional Ethernet (Modbus TCP) for remote monitoring and configuration
Waveform capture and event recorder (128 events, 1 ms resolution) assist post-fault analysis
Conformal coating option available for harsh environments
Application Scenarios
Petrochemical plants – protecting large pumps and compressors against thermal overload and bearing overheating
Power generation – cooling tower fans and induced-draft motors in coal-fired and combined-cycle stations
Water treatment – submersible pumps and aerators with embedded RTD temperature sensors
Mining – conveyor drives and mill motors exposed to dust, vibration, and temperature extremes
Food & beverage – mixers, extruders, and refrigeration compressors requiring precise thermal management
HVAC – chillers and air-handling units in commercial buildings and data centers
Petrochemical plants – protecting large pumps and compressors against thermal overload and bearing overheating
Power generation – cooling tower fans and induced-draft motors in coal-fired and combined-cycle stations
Water treatment – submersible pumps and aerators with embedded RTD temperature sensors
Mining – conveyor drives and mill motors exposed to dust, vibration, and temperature extremes
Food & beverage – mixers, extruders, and refrigeration compressors requiring precise thermal management
HVAC – chillers and air-handling units in commercial buildings and data centers
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