Built For Catenary Protection.
Advanced digital distance and overcurrent protection engineered specifically for railway traction networks and substations.
In rail networks,
seconds feel like miles.
Outdated relays struggle with multi-voltage grids, high inrush, and dead-tank transformers. Slow trips ripple downtime across the entire transit route.
Delayed Traction Trips
Delayed clearing in catenary lines risks wide-area route shutdowns.
Multi-voltage instability
Legacy gear fails to adapt to diverse railway traction voltage bands.
Unsafe control switching
Unreliable local/remote switching increases risk during rail maintenance.
Catenary blind spots
Traditional relays miss high-resistance faults in weak traction networks.
Meet MiCOM P436 & P438
— Built for catenary protection.
Digital distance and overcurrent protection relays for railway catenary feeders. P436 covers 16.7 Hz networks, while P438 handles 25/50/60 Hz systems. Both deliver advanced interlocking, bay control, and deep diagnostics in modular Px3x hardware built to thrive in demanding traction substations.
Protection Shaped
For Traction.
From synchronism check to distance logic, P436/P438 secures rail power backbones.
Distance protection multi-zone
Fast multi-zone coverage with adaptive logic for mixed traction feeders.
SOTF & PSB Readiness
Switch-on-to-fault safety and power swing blocking for grid stability.
Integrated switchgear control
Operate breakers and feeders directly from the high-res relay HMI.
Auto-reclose restores fast
Intelligently keeps catenary systems energised after transient faults.
Voltage & Frequency stability
Strict over/under elements for railway-specific grid compliance.
Detailed rail recording
COMTRADE records and event logs for deep post-fault rail forensics.
Designed for Railway-Grade Resilience
Traction frequency support with high-speed isolation
Where P436 & P438 Lead the Network
Core protection for 16.7Hz metro networks and global railway electrification hubs.
Catenary Feeders
Selective high-speed trips designed for overhead railway lines.
Traction Substation
Primary protection hub for HV/MV railway grid interconnections.
Electrified Metro
High-density bay protection for urban transit power backbones.
Generation Yards
Safe power export from plant generation to railway grids.
Infrastructure Hubs
Securing station and terminal power with multi-frequency logic.
Industrial Rail
Handling high inrush and multi-voltage loads in industrial bays.
Catenary Feeders
Selective high-speed trips designed for overhead railway lines.
Traction Substation
Primary protection hub for HV/MV railway grid interconnections.
Electrified Metro
High-density bay protection for urban transit power backbones.
Generation Yards
Safe power export from plant generation to railway grids.
Infrastructure Hubs
Securing station and terminal power with multi-frequency logic.
Industrial Rail
Handling high inrush and multi-voltage loads in industrial bays.
Rail Protection Tuned To
Your Network
Multi-frequency tuning and catenary stability assessment
Relay Testing, Programming &
Configuration
Traction Substation Tuning
- 16.7Hz Metro Logic Tuning
- Distance Coordination Studies
- Catenary SOTF Validation
Built For
Power Reliability
Trusted across utility and traction sectors
Railways & Metro
Transport Infrastructure
Industrial Substations
Utility Grid
Complementary Rail Units.
Engineering and maintenance services for selective traction isolation.
Platform Member
MiCOM P138
Platform Member
MiCOM P63x
Platform Member
MiCOM P43x
Platform Member