AC traction power supply
As the need for mobility increases, more efficient transport concepts are needed. By electrifying, automating, and digitalizing infrastructures, we’re already setting the benchmarks for future mobility. As one of the world’s leading suppliers of electrotechnical systems, we are the right partner for your AC traction power supply in main-line and regional rail service.
As the need for mobility increases, more efficient transport concepts are needed. By electrifying, automating, and digitalizing infrastructures, we’re already setting the benchmarks for future mobility. As one of the world’s leading suppliers of electrotechnical systems, we are the right partner for your AC traction power supply in main-line and regional rail service.
AC traction power supply – perfectly planned, perfectly implemented
Future-proof AC traction power supply: The system and its components
High-voltage switchgear
Whether you want to connect your substation at the 110 kV or 380 kV level, as stubs or looped in, in outdoor or gas-insulated systems – anything is possible!
Transformers
Siemens transformers within the substation ensure high availability of the traction power supply with nominal voltage of 25 kV or 15 kV.
Medium-voltage switchgear and components
Use of vacuum circuit-breakers in indoor gas-insulated, indoor air-insulated or outdoor air-insulated switchgear ensures reliable fault clearance.
Work more efficiently
High-voltage switchgear for AC traction power supply
Our portfolio includes outdoor air-insulated switching devices as well as indoor gas-insulated switchgear for connection to transmission networks. No matter which nominal voltage level is available or which substation layout you prefer: We offer a tailored solution meeting your needs.
Reliable power supply
Traction power transformers for AC traction power supply
In contrast to conventional transmission or distribution networks, traction power transformers typically feed 1-pole traction power supply systems with nominal phase-to-earth voltage of 15 kV or 25 kV. These are typically built as oil-immersed transformers with air-natural or air-forced cooling with a nominal power between 5 to 85 MVA. Similarly, so called auto-transformers are used for 2-pole traction power supply systems for supplying high-speed or high-performance routes.
Reliable fault clearance
Sitras 8DA11/8DA12 gas-insulated indoor switchgear for AC traction power supply
The Sitras 8DA11 (1-pole) and Sitras 8DA12 (2-pole) gas-insulated switchgears are used for feeding the overhead contact line in AC traction power supply systems. The design is based on the proven 3-pole type of the 8DA10/8DB10 switchgear for distribution network operators and industrial plants.
Your benefits:
- Maximum safety for personnel and equipment proven by extensive type testing
- Reduced risk of internal arc faults due to single-pole enclosure
- Highest availability due to very low failure rate
- Modular design for flexible adaptation to a wide range of requirements:
– Cable connection from bottom, rear, top or even lateral
– Up to fire busbars - Cost-effective: maintenance-free and with minimum space requirements
- Vacuum circuit-breaker by switching in vacuum:
– No toxic substances created by arcs in SF6
– No impairment of SF6 insulating properties
Sitras ASG15 air-insulated indoor switchgear 15 kV for AC traction power supply
The Sitras ASG15 metal-enclosed air-insulated switchgear ensures secure and reliable traction power supply for single-pole systems with nominal frequency16.7 Hz and nominal voltage 15 kV. The type-tested compact switchgear panels meet all of today’s requirements made to powerful AC traction power supply equipment.
Your benefits:
- Highest equipment and personnel safety
− Metallic partition of compartments
− Service continuity class LSC2B
− Internal arc classification - Factory-assembled and compact
− Panel-integrated control and protection devices
− Integrated feeder-related contact-line testing device (AGP)
− 40 kA circuit-breaker with only one vacuum interrupter - High system availability but low life cycle costs
− Use of low-maintenance components
− Use of a circuit-breaker truck
Sitras ASG25 air-insulated indoor switchgear 25 kV for AC traction power supply
The Sitras ASG25® air-insulated switchgear is intended for use in 1- and 2-pole
AC traction power supply systems. It is a type-tested, metal-enclosed switchgear for indoor installation. The general concept of the Sitras ASG25 is based on a proven technology offering high reliability and availability. It provides long lifetime, high number of operating cycles, long lasting insulation properties and low life-cycle costs.
Your benefits:
- High personnel safety
- High fire safety
- Environment-friendly design
- Low life-cycle costs
- High availability
- Fast and easy replacement of the vacuum circuit-breaker by use of tulip contacts
3AH47 indoor vacuum circuit-breakers for AC traction power supply
3AH47-type vacuum circuit-breakers are 1-pole or 2-pole circuit-breakers for indoor applications. They’re ideal for the special requirements and switching tasks in AC traction power supply systems.
Your benefits:
- Proven vacuum switching technology
- Maximum operating safety thanks to:
− Rated short-circuit breaking current of up to 40 kA by use of only one
vacuum interrupter
− Option: Opening time of only 17 ms - Up to 30 000 switching cycles before major maintenance
- Maintenance-free for up to 10 000 operating cycles
- Compact design
Protecting your equipment
SIPROTEC 7ST86 new generation of modular contact line protection for AC traction power supply
The new contact line protection SIPROTEC 7ST86 is a modular device from the SIPROTEC 5 platform. It is designed for use in all common AC traction power supply applications worldwide and can be configured to meet individual demands. Besides common functions like distance protection, new and innovative functions are available.
Your benefits:
- Customizable hardware and software
- Integrates protection, control, measurement, and automation functions in a single unit
- Shortest tripping time with high current stage and distance protection
- Selective and fast fault clearance with directional high current stage
- Ready for future with integrated cybersecurity functions
- Availability of all standard communication protocols
- Extensive and consistent engineering with DIGSI 5
7ST61/7ST63 numerical overhead contact-line protection for AC traction power supply
The SIPROTEC 7ST61/7ST63 numerical overhead contact-line protection relay is a selective and fast-responding protection device for overhead contact lines fed from one or multiple points in AC traction power supply systems. The relay has all the functions needed to protect a section of the overhead contact line and can therefore be deployed universally.
Your benefits:
- Integrates protection, control, measurement, and automation functions in a single unit
- Availability of all standard communication protocols
- Since 20 years available
