Railway catenary systems require highly reliable and fast protection mechanisms to ensure uninterrupted power delivery and system stability. The GE MiCOM P44T Relay stands out as a robust, multifunctional protection solution specifically designed for railway catenary distance protection. It not only provides rapid and selective fault detection but also includes advanced features such as backup protection, thermal protection, recording, control, measurement, and monitoring capabilities. With cutting-edge technology and superior performance, the GE MiCOM P44T relay ensures optimal safety and operational efficiency in railway electrification.
Key Advantages of GE MiCOM P44T Relay
- True Subcycle Distance Tripping: One of the most critical features of the GE MiCOM P44T Relay is its true subcycle distance tripping capability. It operates with a trip time of typically 0.7 to 1 cycle, ensuring ultra-fast fault clearance. This rapid response minimizes damage to infrastructure, prevents prolonged power outages, and enhances overall system reliability.
- Advanced Distance Protection with Delta Directional Decision Technique: The P44T relay employs the delta directional decision technique, which significantly improves fault discrimination. This method ensures highly selective and precise tripping, reducing the risk of nuisance tripping while maintaining system stability. Additionally, five zones of protection with quadrilateral characteristics make the relay adaptable to a variety of AC catenary and feeder systems.
- Customizable Resistive Reach Settings: For railways using regenerative braking trains, the GE MiCOM P44T Relay provides independently settable right and left-hand side resistive reaches for each protection zone. This customization enhances its flexibility, allowing it to accommodate different railway configurations and operational needs effectively.
- Integral Digital Teleprotection Between Line Ends: Reliable communication between relay terminals is crucial for effective protection coordination. The integral digital teleprotection feature in the GE MiCOM P44T ensures seamless interaction between line ends, reducing the risk of misoperations and improving overall system dependability.
- Prevention of False Tripping with Advanced Load Blinding: Heavy electrical loads can sometimes encroach on the protection zone, causing unwanted tripping of the system. However, the MiCOM Agile P44T Relay integrates an advanced load-blinding feature, preventing false tripping due to high-load encroachments. This feature enhances the stability and efficiency of the railway electrification system.
Benefits Of GE MiCOM P44T Relay
- Auto-Reclose Functionality: The auto-reclose feature supplements the main distance protection function by automatically re-energizing the line after a temporary fault. This reduces the need for manual intervention and improves system restoration times, ensuring seamless railway operations.
- High-Speed and Deterministic PSL Logic: The powerful PSL (Programmable Scheme Logic) logic of the P44T relay is both fast and deterministic. And enabling quick decision-making and efficient fault handling. This advanced logic system ensures that the relay operates with precision in complex railway networks.
- Comprehensive Communication Options: The relay supports a wide range of communication protocols, from basic serial communication to advanced IEC 61850 and DNP3 Ethernet. This versatility allows seamless integration with modern digital substations and SCADA systems, ensuring efficient data exchange and system monitoring.
- Robust Environmental Protection: Railway environments can be harsh, exposing equipment to corrosive gases like H₂S or SO₂. The P44T relay comes with a standard harsh environment coating, which protects it from such contaminants, ensuring durability and long-term reliability.
Applications of GE MiCOM P44T Relay
The MiCOM Agile P44T Relay is designed for a wide range of railway catenary protection applications, including:
- Classic or auto transformer-fed catenaries operating at 50 Hz or 60 Hz
- Protection of feeder lines in electrified railway networks
- Ensuring stable operation in high-speed and urban rail systems
- Facilitating quick recovery in the event of faults, minimizing train service disruptions
What’s New in the Latest GE MiCOM P44T Relay?
GE continues to enhance its relay technology with new advancements. And making the MiCOM Agile P44T Relay even more capable and adaptable to modern railway networks. Some of the latest enhancements include:
- Enhanced Ethernet Board Module with Switchable Redundancy: The new Ethernet board module supports PRP (Parallel Redundancy Protocol), HSR (High-availability Seamless Redundancy), and RSTP (Rapid Spanning Tree Protocol) in a single model. This feature allows a single P40 model to be deployed in applications requiring redundant Ethernet communications, improving network reliability and resilience.
- Increased IEC 61850 Network Traffic Handling: The new module significantly reduces time latency, making it highly efficient for handling dense IEC 61850-8-1 network traffic. This ensures faster data exchange and enhances the performance of large-scale digital substations.
- Support for Larger Digital Substation Architectures: With the enhanced HSR ring capability, the P44T relay can now support up to 50 nodes, making it ideal for expanding digital substation networks. This scalability makes it a future-proof solution for modern railway electrification systems.
- Universal IRIG-B Support: The relay supports both modulated and demodulated IRIG-B signals. However, enhancing its synchronization accuracy and ensuring precise time-stamping of fault events.

Why Choose GE for Railway Protection Solutions?
With over a century of experience in power system innovation, GE delivers highly reliable protection solutions for railway electrification. The MiCOM Agile P44T Relay portfolio is trusted worldwide for its cutting-edge technology, superior reliability, and ease of integration into modern substations.
Why GE MiCOM P44T Relay:
- Proven reliability in railway catenary protection applications
- Fast, selective tripping minimizes system damage and downtime
- Flexible communication protocols for seamless SCADA and substation integration
- Comprehensive environmental protection ensures long-term durability
- Advanced functionalities such as load blinding and auto-reclose enhance system stability
- Future-ready Ethernet networking capabilities for large digital substations
Conclusion
The GE MiCOM P44T Relay is the ideal choice for reliable catenary protection in railway electrification systems. With its true subcycle tripping, advanced distance protection, customizable settings, and robust communication options, it ensures a fast, efficient, and stable power supply for railway operations. Additionally, GE’s commitment to continuous innovation and enhanced networking capabilities makes the P44T a future-proof solution for modern rail infrastructure.
Invest in the GE MiCOM P44T Relay today and experience superior protection, seamless integration, and enhanced reliability in railway catenary systems!
At Digital & Smart Grid Enterprises, we take pride in being leading MiCOM Agile P44T Relay Suppliers and exporters of the GE Numerical Relay. Our commitment is to deliver tailored relay solutions that meet various industry requirements. Whether you have questions or wish to make a purchase, feel free to contact us for MiCOM Agile P44T Relay Price at +917021624024 or via email at marketing@dsgenterprises.in. With our deep expertise in GE Numerical Relay, we guarantee consistent support throughout your journey. Discover our extensive product range by clicking here for more information.