Schneider Electric Easergy MiCOM P645 Numerical Transformer Protection Relay

Schneider Electric Easergy MiCOM P645 Numerical Transformer Protection Relay is designed to provide advanced protection, control and monitoring for large power transformers, autotransformers and other critical transformer installations. It combines high-speed transformer differential protection with comprehensive monitoring functions to help improve transformer reliability and reduce the risk of unexpected failures.

The MiCOM P645 offers fast response to internal transformer faults while maintaining stable operation during external faults. Along with differential protection, the relay includes restricted earth fault protection, thermal overload protection, overfluxing protection and backup overcurrent protection. It also supports transformer condition monitoring and asset management, allowing maintenance teams to monitor equipment health and plan maintenance based on actual operating conditions.

Built for modern substations, the MiCOM P645 supports IEC 61850 communication, redundant Ethernet networks and advanced cybersecurity features. Its flexible hardware configuration supports up to five sets of three-phase current transformer inputs, making it suitable for complex transformer applications in utility, industrial and power generation systems.

Specifications

• Manufacturer: Schneider Electric
• Product Family: Easergy MiCOM
• Model: MiCOM P645
• Relay Type: Numerical Transformer Protection Relay
• Protection Application: Large power transformers and autotransformers
• Main Protection: Transformer differential protection
• Restricted Earth Fault Protection: High and low impedance REF protection
• Thermal Overload Protection: Supported
• Overfluxing Protection: Supported
• Backup Overcurrent Protection: Supported
• Current Transformer Inputs: Supports up to five sets of three-phase CT inputs
• Voltage Transformer Input: Optional three-phase VT input
• Transformer Monitoring: Asset monitoring and thermal supervision
• Event Recording: Supported
• Disturbance Recording: Supported
• Communication Interfaces: Serial and Ethernet
• Communication Protocols: IEC 61850 Edition 1 & 2, Modbus, DNP3 and IEC 60870-5-103
• Ethernet Redundancy: PRP, HSR and RSTP
• IRIG-B Time Synchronisation: Supported
• Cybersecurity: IEC 62351 compliant
• Integration: SCADA, DCS and digital substations

Features

• Numerical relay designed for advanced transformer protection.
• High-speed transformer differential protection with excellent stability.
• High and low impedance restricted earth fault protection.
• Thermal overload and overfluxing protection.
• Integrated backup overcurrent protection.
• Supports up to five sets of three-phase CT inputs for complex transformer applications.
• Transformer asset monitoring helps improve maintenance planning.
• IEC 61850 communication with PRP, HSR and RSTP Ethernet redundancy.
• Event and disturbance recording support detailed fault analysis.
• Easy integration with SCADA, DCS and digital substation automation systems.

Applications

• Large power transformers
• Autotransformers
• Utility substations
• Industrial power distribution systems
• Power generation plants
• High-voltage substations
• Extra-high-voltage substations
• Renewable energy substations
• Digital substations

Schneider Electric Easergy MiCOM P645 Numerical Transformer Protection Relay combines advanced transformer protection, comprehensive monitoring and modern communication capabilities, making it an ideal solution for protecting critical transformer assets in demanding power system applications.