EcoStruxure Power Digital Solutions and Services for Auxiliary Power Systems

What is it?

Auxiliary Power Systems are electrical distribution systems

incorporated in the railway infrastructure to power loads

that require electricity for their operation, such as:

• Interlocks and other signaling equipment
• Track sensors
• Point heaters
• Telecommunications equipment
• Other technical buildingsThey are particularly used in areas where it is not possible to find a regular supply of electricity.

• 25% of the total energy of the railway system is consumed by auxiliary power systems.

How it works?

To ensure high reliability, auxiliary power systems use

dual-source power distribution loops.

This setup provides redundancy by connecting two

independent power sources, allowing uninterrupted

operation even if one source fails.

Key Benefits:

✔ Continuous Power Supply – If one source fails, the backup automatically takes over.

✔ Enhanced Stability – Minimizes downtime and improves fault tolerance.     

✔ Flexible Power Routing – Electricity can flow through alternate paths if disruptions occur.

Main components of the electrical architecture solution

Key Components of the Electrical Architecture

Medium Voltage (MV) Switchgear Cabinets

•Three-phase distribution cabinets for power control

and protection.

•Isolate faults and maintain system stability.

Auxiliary Power Transformer (Dry-Type)

•Converts voltage levels to support auxiliary systems

safely.

Control, Protection & Measurement Equipment

•Relays, circuit breakers, and sensors for fault detection.

•Real-time monitoring of voltage, current, and power

quality.

Low Voltage (LV) Distribution Equipment

•Switches, distribution panels, and cooling systems.

•Ensures safe power delivery to end-use applications