How Do Components Within Railway Vehicles Work Under Standardization? - Alltronix

1. With the continuous development of the railway industry, a large number of electronic equipment is adopted in the railway transportation system to improve the reliability of the vehicle. All the equipment is mainly powered by an auxiliary power supply system and battery system, and take power from a low-voltage bus power supply. The electronics mainly consist of TCMS, PIS, PA system, ATC, etc. which are isolatedly powered by bus to ensure reliable operation of each subsystem, which in turn isolates fault areas in case of equipment failure. Thus, the equipment is interconnected through train communication bus with remote control function, as the drivers cannot control every electronic system through the on-board controller. There are many auxiliary systems present on rail vehicles like compressors, pumps, lighting, air-conditioning, passenger information systems, etc. In order to provide energy to all these systems, an auxiliary power unit converts the voltage from the overhead line or a third rail to the required levels of supply voltages. The total auxiliary power demand is typically in the range of tens of kilowatts to hundreds of kilowatts. This is the reason why DC-to-DC converters are used within such vehicles to convert power. Commuter rail systems require mobile office communication and infotainment, while freight rail systems require monitoring and control to assure timely goods delivery. Thus, modern rail infrastructure requires a wide range of DC-DC convertors to power all these services of both freight and commuter markets. These power converters are industrial- grade products that satisfy the specific electrical, mechanical, and environmental

2. requirements of rail applications. They are designed to meet electrical standards like . This is the international standard that applies to all electronic IEC60571 in India equipment for control, regulation, protection, and supply, installed on rail vehicles, and associated with the accumulator battery of the vehicle, or a low voltage power supply source. This power supply source may or may not have a direct connection to the contact system. However, there is an exception of electronic power circuits t hat conform to IEC 61287-1. The IEC 60571 standard covers the conditions of design, operation, construction, and testing of electronic equipment, along with the basic hardware and software requirements that are necessary for reliable and competent equipment. These specifications may also complement other standards like – 1.Specific requirements related to practices necessary to ensure functional safety are determined in accordance with 4.6.3.1 and 4.6.3.2 of IEC 62278 and its informative Annex A. 2.Software safety integrity level of 1 or higher should be considered only when it is shown that a residual safety risk remains, and that it has to be carried by the software driven programmable electronic system. In this case, IEC 62279 is applicable. Here, the electronic equipment is mainly composed of semiconductor devices and recognized associated components, which are mounted on printed boards. Also, sensors and firing unit printed board assemblies for power electronic devices are covered by this standard. All rail electronics and components regarding GPRS VPN wireless, high tech planar antennas, industrial Bluetooth, industrial Ethernet, IOT gateways, M2M routers, point to multipoint, RF point to point, serial wireless, wireless I/Os, and train and subway available at Alltronix conform to the standard of IEC60571 in India. For more information, visit: http://www.alltronixin.com/