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MICOM P139-86904540-303-403-604-456-921

The Alstom MICOM P139 (Ref: 86904540-303-403-604-456-921) is a multi-functional numerical protection relay designed for railway traction power supply, substations, and catenary protection. It combines high-speed fault detection, metering, and control in a compact, ruggedized unit, ensuring safe and efficient power distribution for rail networks.

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Key Features
1. Comprehensive Protection Functions
Overcurrent, directional overcurrent, and earth fault protection

Distance protection (impedance-based) for overhead lines

DC traction system protection (1.5kV/3kV DC fault detection)

2. Railway-Specific Adaptations
EN 50155 compliant (railway electronic equipment)

SIL2 certified (EN 50126/8/9 for safety functions)

High immunity to harmonics & transients (EN 50121-3-2)

3. Smart Monitoring & Communication
Real-time metering (voltage, current, power, harmonics)

Event recording & oscillography (up to 1000 fault records)

IEC 61850, Modbus, DNP3, and Ethernet support

4. Rugged & Maintenance-Friendly
-40°C to +70°C operating range (EN 50155 Class TX)

Front-access LCD & keypad for local configuration

Modular design for easy servicing

Technical Specifications
Parameter Specification
Voltage Input 15kV–36kV AC / 1.5kV–3kV DC
Current Input 1A or 5A (configurable)
Protection Speed <20ms for overcurrent faults
Communication Ethernet, RS-485, IEC 61850
Power Supply 24V DC / 110V DC / 220V AC
Certifications EN 50155, IEC 60255, UL 508
Applications
✔ AC/DC traction substations (25kV AC / 1.5kV–3kV DC)
✔ Catenary protection & feeder automation
✔ Railway power distribution networks
✔ Industrial MV switchgear in rail environments

Benefits
✅ High Reliability – Proven MICOM relay technology
✅ Precision Protection – Adaptive algorithms for rail power systems
✅ Seamless Integration – Works with SCADA & Alstom Iconis®
✅ Reduced Maintenance – Self-diagnostics & event logging