The GE 239-RTD-AN is a high-reliability motor protection relay, belonging to GE Multilin 239 motor management relay series. As a core component for AC motor protection and temperature monitoring, it is specifically designed to protect three-phase AC motors from overload, overheating, short circuit, ground fault and other potential faults. It integrates RTD (Resistance Temperature Detector) temperature measurement function, supports multiple communication protocols and flexible configuration, and is widely applied in industrial plants, power generation, petrochemical, metallurgical and other scenarios to ensure safe and stable operation of motors and reduce downtime.
Technical Parameters & Specifications
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Item
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Specifications
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Product Model
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239-RTD-AN
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Product Type
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Motor Protection Relay, GE Multilin 239 Series
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Manufacturer
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General Electric (GE), GE Multilin
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Rated Voltage
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110-250V DC or 100-240V AC; compatible with 240V AC to 690V AC power systems
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Rated Current
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70A to 600A, suitable for different power motor protection needs
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Frequency
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50Hz or 60Hz, adaptable to global power supply standards
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RTD Configuration
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3 programmable RTD inputs; supports PT, NI, CU RTD types; 3-wire lead resistance compensation
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Temperature Measurement
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Accuracy: ±0.1°C; supports PTC/NTC programmable thermistor; built-in cold end compensation
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Response Time
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Less than 5 seconds, ensuring rapid fault response and protection
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Communication Interfaces
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RS485; Modbus RTU protocol, enabling seamless integration with industrial automation systems
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Operating Temperature
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-40°C to +70°C (-40°F to +158°F), adaptable to harsh industrial working environments
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Storage Temperature
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-40°C to +85°C (-40°F to +185°F), ensuring stable storage in extreme temperature conditions
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Relative Humidity
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5% – 95% (non-condensing), preventing moisture damage to internal components
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Protection Rating
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IP67 (IEC 60529), watertight and dustproof, suitable for harsh on-site environments
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Mounting Type
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19-inch standard rack mounting, 1U height; compatible with GE Fanuc 90-30, 90-70 and VersaMax series PLC I/O backplanes
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Dimensions (L×W×H)
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Approx. 483mm × 44mm × 220mm (19in × 1.73in × 8.66in), standard rack size for easy integration
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Net Weight
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Approx. 2.3kg (5lbs), standard weight for rack-mounted industrial components
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Certifications
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CE, UL, ISO 9001 compliant, meeting international industrial safety and quality standards
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Insulation Voltage
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300V, ensuring safe electrical insulation performance
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Product Features
The GE 239-RTD-AN integrates comprehensive protection, precise temperature monitoring and flexible compatibility, perfectly meeting the core needs of AC motor protection and industrial system integration:
1. Comprehensive Motor Protection: Equipped with overload, short circuit, ground fault and overheating protection functions, it can quickly detect fault conditions and cut off circuits in time to avoid motor damage and production downtime.
2. Precise RTD Temperature Monitoring: With 3 programmable RTD inputs and high measurement accuracy, it can real-time monitor motor winding temperature, and support multiple RTD types and 3-wire lead resistance compensation to ensure accurate temperature data collection.
3. High Reliability & Anti-Interference: Adopts channel isolation design to prevent crosstalk between channels; with excellent electromagnetic compatibility (EMC) and IP67 protection rating, it can operate stably in high-noise, harsh industrial environments.
4. Flexible Integration & Operation: Supports RS485 and Modbus RTU communication, seamlessly integrating with industrial automation systems; front panel LED indicators display operation, fault and communication status, facilitating quick status judgment and maintenance.
5. Wide Compatibility & Convenience: Compatible with multiple GE PLC systems and standard rack mounting, easy to install and integrate; supports hot-swap (with redundant power configuration) and is equipped with optional PC software for convenient parameter configuration.
Other GE Similar Models
In addition to the GE 239-RTD-AN, GE provides a series of high-quality motor protection relays and matching modules to adapt to different application scenarios:
1. GE 239-RTD-AN-H: A harsh environment version of 239-RTD-AN, with conformal coating for enhanced protection in extreme harsh working conditions.
2. GE HE693RTD600: A high-density RTD input module, designed for precise temperature measurement in industrial automation systems, compatible with Modbus and Profibus protocols.
3. GE IC670ALG620-JD: A 4-channel isolated RTD temperature input module, compatible with 3-wire/4-wire RTD sensors, suitable for temperature monitoring in petrochemical and power industries.
4. GE 239-BASE: The baseline model of the 239 series, providing basic motor protection functions, cost-effective for simple motor protection scenarios.
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