Schneider Electric Easergy MiCOM P545 Numerical Current Differential Protection Relay

Schneider Electric Easergy MiCOM P545 Numerical Current Differential Protection Relay is designed to provide high-speed protection for overhead transmission lines and underground cable systems. It combines current differential protection with integrated distance protection, giving utilities a complete solution for protecting high-voltage, extra-high-voltage and ultra-high-voltage transmission networks.

The MiCOM P545 continuously compares the current flowing at both ends of the protected line, allowing it to identify internal faults quickly while remaining stable during external disturbances. In addition to differential protection, the relay includes integrated five-zone subcycle distance protection, directional earth fault protection, overcurrent protection and auto-reclose functions, providing dependable main and backup protection for critical transmission assets.

Designed for single circuit breaker feeder applications, the MiCOM P545 supports direct fibre optic and multiplexed communication channels for secure end-to-end protection. It also offers IEC 61850 communication, programmable logic, advanced monitoring and fault recording, making it easy to integrate into modern digital substations and SCADA systems.

Specifications

• Manufacturer: Schneider Electric
• Product Family: Easergy MiCOM
• Model: MiCOM P545
• Relay Type: Numerical Current Differential Protection Relay
• Protection Application: Transmission line and underground cable protection
• Suitable For: HV, EHV and UHV transmission networks
• Main Protection: High-speed current differential protection
• Distance Protection: Integrated five-zone subcycle distance protection
• Directional Earth Fault Protection: Supported
• Overcurrent Protection: Supported
• Auto-Reclose: Supported
• Check Synchronism: Supported
• Fault Locator: Integrated
• Breaker Configuration: Single circuit breaker applications
• Communication Channel: End-to-end longitudinal communication
• Communication Media: Direct fibre optic and multiplexed digital links
• 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
• InterMiCOM64 Teleprotection: Supported
• Cybersecurity: IEC 62351 compliant
• Integration: SCADA and digital substation compatible

Features

• Numerical relay combining current differential and distance protection.
• High-speed protection for overhead transmission lines and underground cables.
• Integrated five-zone subcycle distance protection.
• Fast and selective detection of internal transmission line faults.
• Directional earth fault and overcurrent backup protection.
• Auto-reclose and check synchronism improve system availability.
• Designed for single circuit breaker transmission line applications.
• IEC 61850 communication enables digital substation integration.
• InterMiCOM64 teleprotection supports secure end-to-end communication.
• Event and disturbance recording simplify fault analysis and maintenance.

Applications

• Transmission line protection
• Overhead transmission lines
• Underground cable protection
• High-voltage substations
• Extra-high-voltage transmission systems
• Ultra-high-voltage transmission networks
• Single circuit breaker feeder applications
• Utility power networks
• Digital substations

Schneider Electric Easergy MiCOM P545 Numerical Current Differential Protection Relay combines high-speed differential protection, integrated distance protection and advanced communication features, making it a dependable solution for transmission networks that require fast fault clearance, reliable backup protection and seamless substation integration.