EN IEC 60310:2026

Overview

EN IEC 60310:2026 – "Railway applications - Transformers and inductors on board rolling stock" – provides comprehensive requirements for the design, classification, service conditions, characteristics, and testing of transformers and inductors installed on railway rolling stock. Issued by the CLC and developed by IEC Technical Committee 9, this fifth edition supersedes the 2016 version, introducing technical revisions to enhance international harmonization in the railway industry.

The standard applies to both traction and auxiliary power transformers, as well as inductors (also known as reactors) used in traction and auxiliary circuits, fit for both dry and liquid-immersed configurations. EN IEC 60310:2026 aims to ensure that on-board electrical components meet rigorous operational, safety, and reliability standards, fostering interoperability and resilience within global railway networks.

Key Topics

EN IEC 60310:2026 covers a range of critical topics to support manufacturers, integrators, and rail operators:

• Definitions and Classification Clear terminology for traction and auxiliary transformers, inductors, voltage types, and service conditions.
• Service Conditions Environmental, operational, and electrical conditions for reliable functioning of transformers and inductors on rolling stock.
• Technical Characteristics Comprehensive characterization of rated voltage, current, power ratings, load profiles, insulation requirements, and temperature limits.
• Test Methods and Procedures Detailed guidance covering:
  • Type tests, routine tests, and investigation tests
  • Dielectric, insulation resistance, short-circuit withstand, shock and vibration (aligned with IEC 61373), and thermal endurance tests
  • Specific provisions for dry-type and liquid-immersed designs, with revised subclauses and separate temperature tests for each
• Design Requirements Requirements for cooling methods-now including standardized letter symbols-markings, rating plates, and mechanical/fire safety measures.
• Agreements and Documentation Annexes outline key parameters to be agreed between manufacturer and purchaser, ensuring solution fit for purpose.

Applications

The practical value of EN IEC 60310:2026 is found across all aspects of modern railway rolling stock engineering:

• Traction Transformers: Supplying propulsion systems for locomotives, high-speed trains, and multiple unit vehicles.
• Auxiliary Transformers: Powering auxiliary systems such as lighting, HVAC, control electronics, and battery charging.
• Inductors in Traction Circuits: Smoothing currents and protecting critical components in both AC and DC rail vehicle systems.
• Compliance and Interoperability: Ensuring global compatibility and legal conformity for equipment manufacturers and railway operating companies.
• Reliability and Safety: Supporting high safety margins and long service life through robust design and testing against shock, vibration, and variable load profiles.

The standard is essential for manufacturers, rail system integrators, operators, and maintenance entities seeking to achieve certification and contract compliance for on-board power components.

Related Standards

EN IEC 60310:2026 references and complements a suite of international standards essential for railway electrification and rolling stock:

• IEC 60076 series: Power transformers (general, temperature rise, insulation, sound, and reactors)
• IEC 61373: Railway applications – Rolling stock equipment – Shock and vibration tests
• IEC 60077-1: Electric equipment for rolling stock – General rules
• IEC 62498-1: Environmental conditions for equipment on board rolling stock
• IEC 62497-1: Insulation coordination
• ISO 3746 and ISO 9614: Acoustics and noise measurement procedures
• IEC 60085, IEC 60836, IEC 61039: Electrical insulation and materials

Implementing EN IEC 60310:2026 alongside these related standards supports consistent, reliable, and efficient rail systems, maximizes fleet interoperability, and upholds the highest safety and performance levels for railway operations worldwide.

For current editions, always consult official IEC and CLC resources.