239-RTD | GE Multilin Motor Protection Relay

The GE Multilin 239-RTD-AN is a motor protection relay designed to provide comprehensive monitoring and protection for motors in industrial applications. Manufactured by GE Consumer and Industrial - Multilin, this relay is engineered to enhance motor reliability and prevent damage from various fault conditions, ensuring optimal performance and longevity of motor systems. It is equipped with advanced features that make it suitable for integration into a wide range of motor control systems.

The 239-RTD-AN model supports insulation voltage up to 300 V, providing robust protection against electrical faults. The relay is designed to be used with a fuse rated at 5 x 20 mm, 250 V, and 2.5 A, ensuring that it can effectively protect against overcurrent conditions while maintaining safe operation. These specifications make it suitable for high-demand environments where motor protection is critical.

One of the key features of the 239-RTD-AN is its high accuracy in overload curve trip time, with a precision of ± 1% of the displayed value. This accuracy ensures that the relay can respond promptly and effectively to overload conditions, minimizing the risk of motor damage due to prolonged exposure to excessive current. The ability to accurately detect and respond to overloads is essential for maintaining motor health and preventing costly downtime due to equipment failure.

The relay offers programmable output options, including thermal capacity, percentage of full load, and phase current. This programmability allows users to tailor the relay's response to specific operational needs, providing flexibility and adaptability in different industrial scenarios. By monitoring these critical parameters, the 239-RTD-AN helps maintain optimal motor performance and reduces the likelihood of overheating and other thermal-related issues.

The 239-RTD-AN also features a short circuit and ground trip level setting, adjustable from 1 to 11 times the CT primary current or off. This range provides flexibility in configuring the relay to suit the specific protection requirements of different motor setups. By offering a wide range of settings, the relay can be optimized for various motor types and sizes, ensuring comprehensive protection across diverse applications.

The relay is designed to withstand radio frequency interference (RFI) testing with a 50 MHz/15 W transmitter, demonstrating its resilience in environments where electromagnetic interference could affect performance. This capability ensures reliable operation even in electrically noisy industrial settings, maintaining the integrity of protection functions under challenging conditions.

With a storage temperature range of -40 to 158°F, the 239-RTD-AN is built to endure harsh environmental conditions. This wide temperature tolerance ensures that the relay can be stored and operated in various climates without compromising its functionality. The ability to operate in extreme temperatures makes it a versatile choice for global applications, including those in regions with significant temperature variations.

The unbalance delay feature, adjustable from 0 to 60 seconds, allows the relay to manage the response time to unbalanced load conditions. This delay setting enables users to fine-tune the relay's operation, balancing sensitivity to unbalance with the need to avoid nuisance trips in transient conditions. By carefully managing unbalance conditions, the 239-RTD-AN helps maintain motor efficiency and prevent unnecessary wear and tear.

In summary, the GE Multilin 239-RTD-AN motor protection relay is a robust and versatile solution for safeguarding motors in industrial applications. With features like high trip time accuracy, programmable outputs, RFI resistance, and a broad operating temperature range, it provides comprehensive protection and adaptability. Its ability to handle various fault conditions and environmental challenges makes it an essential component for maintaining the reliability and efficiency of motor-driven systems.