ALSTOM 029.144.440 Feeder Protection Relay
The ALSTOM 029.144.440 is a numerical feeder protection relay belonging to the renowned MicOM P144 series. It is engineered to provide comprehensive protection, control, and monitoring for distribution and sub-transmission feeders in utility and industrial power systems. This relay combines advanced algorithms with robust hardware to ensure rapid fault clearance and system stability.
Key Features
Three-phase directional and non-directional overcurrent protection (50/51/67)
Sensitive earth fault protection with directional capability (50N/51N/67N)
Four-shot autoreclosure with check synchronism and voltage supervision
Under‑voltage and over‑voltage protection (27/59)
Comprehensive fault and disturbance recording (up to 100 events)
Multiple communication protocols: IEC 61850 Edition 2, Modbus RTU, DNP3, and IEC 60870‑5‑103
Local front panel with graphical LCD and intuitive keypad
Conforms to IEC 60255 and IEEE C37.90 standards
Technical Specifications
Rated current: 1 A or 5 A (configurable via CT settings)
Rated frequency: 50 / 60 Hz
Current input dynamic range: 100 x In
Protection accuracy: ±2% or better
Binary inputs: 8 digital inputs (24‑220 V DC)
Output relays: 6 trip contacts, 4 signal contacts
Communication ports: 2 Ethernet (RJ45/fiber), 2 RS485
Power supply: 24‑250 V DC / 100‑240 V AC
Operating temperature: -25°C to +70°C
Applications
The 029.144.440 is ideally suited for protection of radial and looped distribution feeders, industrial plant entrances, and cogeneration facilities. It can be deployed in primary and secondary substations, as well as in renewable energy power plants. The relay’s directional overcurrent and earth fault functions enable selective coordination in complex networks.
Integration and Usability
Designed for seamless integration into modern automation systems, the relay supports horizontal GOOSE messaging for fast interlocking schemes and vertical communication with station controllers. Its embedded web server allows easy configuration and monitoring via standard browsers. The relay also features a user‑programmable logic editor for custom protection schemes.
With a proven track record in thousands of installations worldwide, the ALSTOM 029.144.440 delivers reliable protection, reducing downtime and extending asset life.
