Protection That Never Blinks.
MiCOM P138 delivers selective overcurrent and voltage protection designed for railway substations—built to secure feeders and catenary systems.
In rail networks,
seconds feel like miles.
Outdated relays struggle with multi-voltage grids and dead-tank transformers. Slow trips ripple downtime across the entire route.
Slow feeder trips
Delayed clearing in catenary lines risks wide-area route shutdowns.
No multi-voltage support
Legacy gear fails to adapt to diverse traction voltage bands.
Unsafe switchgear control
Unreliable local/remote switching increases risk during maintenance.
Weak dead-tank detection
Traditional relays miss residual current faults in critical transformers.
Meet MiCOM P138
— Made for rail.
MiCOM P138 is a railway-grade overcurrent and voltage protection relay engineered for 16.7, 25, 50, and 60 Hz systems. It secures catenary feeders, dead-tank transformers, and busbars with advanced logic and high-speed tripping. Modular and protocol-rich — it’s built for rail where reliability is non-negotiable.
Protection Shaped
For Rail.
From dead-tank detection to synchronism check, P138 keeps traction power safe.
Multi-frequency protection
Native support for 16.7 / 25 / 50 / 60 Hz without external converters.
High-speed feeder clearing
DTOC, IDMT, and high-set stages trip before faults propagate.
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.
Dead-tank safety
Residual current protection prevents hidden failures in rail assets.
Voltage stability
Over/under-voltage and frequency protection for grid compliance.
Designed for Railway-Grade Endurance
Multi-frequency support with high-speed isolation
Where P138 Sets the Standard
Precision overcurrent and voltage protection for modern railway hubs.
Catenary Feeders
Selective overcurrent and distance backup for rail traction lines.
Traction Substation
Integrated control and protection hub for railway power nodes.
Dead-Tank Safety
High-impedance protection for specialized railway transformer units.
Metro Infrastructure
Compact safety logic for urban transit power backbones.
Terminal Power
Reliable distribution for airports and railway station hubs.
25kV Traction
Multi-voltage logic designed for 25kV rail electrification.
Catenary Feeders
Selective overcurrent and distance backup for rail traction lines.
Traction Substation
Integrated control and protection hub for railway power nodes.
Dead-Tank Safety
High-impedance protection for specialized railway transformer units.
Metro Infrastructure
Compact safety logic for urban transit power backbones.
Terminal Power
Reliable distribution for airports and railway station hubs.
25kV Traction
Multi-voltage logic designed for 25kV rail electrification.
Traction Protection Tuned To
Your Network
Tailored assessment and multi-frequency configuration for railway hubs
Relay Testing, Programming &
Configuration
Traction Substation Tuning
- Frequency converter validation
- 16.7Hz Logic Calibration
- Catenary stability verification
Built For
Power Reliability
Trusted across utility and traction sectors
Railways & Metro
Transport Infrastructure
Industrial Substations
Utility Feeders
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Engineering and maintenance services for selective fault isolation.
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