ALSTOM 029.148.906 Motor Protection Relay

Product Brief Description

ALSTOM 029.148.906 is a numerical motor protection relay of MiCOM series, designed for medium and large critical electric motors. It combines thermal overload modeling, multi-element electrical protection and RTD temperature monitoring to prevent motor damage from overload, locked rotor, phase unbalance and earth faults. This relay provides reliable protection, measurement, control and fault recording functions for industrial motor drives. We supply fully inspected surplus and refurbished units for power system maintenance and emergency spare replacement.

Product Features

• Thermal overload protection with advanced motor thermal model, supporting RTD temperature bias correction
• Locked rotor supervision, start time monitoring, negative sequence overcurrent and stator earth fault protection
• Undercurrent / load loss protection, over-power protection and repeated start inhibition function
• Supports Pt100 RTD inputs for stator and bearing temperature monitoring, alarm and trip logic
• Built-in fault disturbance recorder and high-resolution event logger for post-fault analysis
• Multiple communication options including Modbus RTU, Profibus DP and optional IEC 61850 for SCADA integration
• Refurbished relays pass protection logic test, analog injection calibration and full functional inspection before shipment

Application Scenarios

• Medium voltage large motor protection in petrochemical, mining and water treatment plants
• Motor control centers and substation automation systems for critical process motors
• Pulp & paper, cement and metal manufacturing production line drive motor protection
• Fan, pump and compressor motor protection for power plant auxiliary systems
• Preventive maintenance, relay replacement and spare parts inventory backup for industrial power facilities

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