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

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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
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• requirements of rail applications. They are
  designed to meet electrical standards like
  IEC60571 in India. This is the international
  standard that applies to all electronic
  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
• 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.
• 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/