IEC 60571:2012

Overview

IEC 60571:2012 is an international standard published by the International Electrotechnical Commission (IEC) that addresses electronic equipment used on railway rolling stock. This standard defines stringent requirements for the design, construction, environmental and electrical operating conditions, testing, and reliability of electronic control, regulation, protection, and supply equipment installed on rail vehicles. It ensures that such equipment can perform competently and reliably under specified service conditions.

The scope of IEC 60571:2012 includes electronic equipment associated with the vehicle’s accumulator battery or low voltage power supply systems, whether or not directly connected to the rail contact system. Notably, the 2012 edition introduces additional criteria concerning nominal operating voltages to reflect evolving railway electrical systems.

Key Topics

IEC 60571:2012 covers a comprehensive array of topics key to the performance and safety of railway electronic equipment, including:

• Environmental Service Conditions: Specifies normal and special environmental conditions such as altitude, ambient temperature ranges, shock, vibration, humidity, and atmospheric pollutants to ensure robust operation in harsh railway environments.
• Electrical Service Conditions: Defines power supply characteristics including sources from accumulator batteries, static converters, overhead lines, and third rails along with supply variability, overvoltages, surges, electrostatic discharge, and electromagnetic compatibility requirements.
• Reliability and Maintainability: Emphasizes reliability prediction and proof, expected useful life, and maintenance levels with provisions for both on-vehicle and off-vehicle diagnostics, built-in test equipment, and automatic test methods.
• Design Requirements: Guidance on hardware and software design ensuring fault protection, proper interfacing, voltage referencing, interchangeability, and management of inrush currents. Software design measures and features such as self-test, watchdog timers, error indication, and recovery mechanisms are also detailed.
• Components and Construction: Standards for component procurement and application, mechanical protection, mounting techniques, wiring types, printed circuit boards, coatings, identification, cooling, ventilation, and material finishes.
• Safety: Addresses functional safety of electronic equipment as well as personnel safety standards to minimize hazards during operation and maintenance.
• Documentation: Specifies requirements for comprehensive documentation including circuit diagrams, component layouts, wiring diagrams, equipment drawings, and software documentation to facilitate manufacturing, maintenance, and testing processes.
• Testing Methods: Outlines procedures for electrical, environmental, and electromagnetic compatibility testing to verify compliance with the standard’s criteria.

Applications

IEC 60571:2012 applies directly to a broad spectrum of electronic control and supply equipment on rolling stock, ensuring that:

• Safety-critical electronic systems aboard trains meet dependable operational standards.
• Railway manufacturers and equipment suppliers adhere to harmonized international practices to improve interoperability and system reliability.
• Maintenance teams can utilize standardized diagnostic and test protocols to reduce downtime and optimize maintenance efforts.
• Rail operators benefit from equipment designed to withstand challenging environmental conditions like vibrations, temperature extremes, and electromagnetic interference commonly found in railway environments.

This standard is critical for the development and certification of components such as train control units, battery monitoring systems, onboard power converters, signaling interfaces, and protection relays.

Related Standards

For holistic railway electronic equipment compliance and safety assurance, IEC 60571:2012 works in conjunction with other relevant international standards, including:

• IEC 61373 - Railway applications - Rolling stock equipment - Shock and vibration tests, which complements the environmental conditions specified in IEC 60571.
• IEC 62236 series - Railway applications - Electromagnetic compatibility, which addresses EMC performance requirements for railway electronic systems.
• EN 50155 - Railway applications - Electronic equipment used on rolling stock, often aligned with or referenced alongside IEC 60571 for European railways.
• IEC 61508 - Functional safety of electrical/electronic systems, important for addressing safety lifecycle and risk management of critical electronic equipment.
• IEC 62278 (RAMS) - Railway applications - Reliability, Availability, Maintainability and Safety, which relates to the reliability and maintainability requirements highlighted in IEC 60571.

IEC 60571:2012 stands as an essential, practical international standard guiding the production, implementation, and maintenance of reliable, safe electronic equipment in railway rolling stock, promoting safety, interoperability, and operational excellence across the global railway industry.