Railway vehicles need a brake system to operate safely and to control the speed easily and quickly. The braking system is classified as mechanical braking, which converts kinetic energy into heat, and electrical braking, which converts power energy into heat. When kinetic energy is converted back into electrical energy, it can slow down or stop an electric motor and this energy is dissipated using a power resistor.
Brake resistors have high power ratio and low ohm values. Railway vehicle motors work like generators during braking such generate regenerative energy and this energy damages the driver, other electrical equipments.

ADVANTAGES

  • Fast cooling
  • Lighter in weight per kilowatt
  • Low inductive characteristic
  •  Mechanical structure extremely resistant to vibrations,
  • High flexibility for shock absorption.

TECHNICAL SPECIFICATIONS AND TABLE

  • Maximum Operating Voltage      : 25 kV
  • Resistance Tolerance (@ 20°C)  : +7/-5 %
  • Isolation                                           : 70 kV 1 min.(Umax = 25 kV)
  • Overvoltage Categories                 : OV1, OV2, OV3, OV4
  • Pollution Class                                : PD1, PD2, PD3, PD3A, PD4, PD4A, PD4B
  • Protection Class                               : IP 20
  • Resistor Material                             : Stainless Steel
  • Enclosure Material                         : Stainless Steel

RELATED STANDARDS

  • IEC / TS EN 60322 : Railway applications - Electric equipment for rolling stock - Rules for power resistors of open construction
  • IEC / TS EN 60077-1 : Railway applications - Electric equipment for rolling stock - Part 1: General service conditions and general rules
  • IEC / TS EN 61373 : Railway applications - Rolling Stock Equipment - Shock And Vibration Tests
  • TS EN 50124-1 : Railway applications - Insulation coordination - Part 1: Basic requirements - Clearances and creepage distances for all electrical and electronic equipment
  • TS EN 50124-2 : Railway applications - Insulation coordination - Part 2: Overvoltages and related protection
  • IEC / TS EN 60529 : Degrees of protection provided by enclosures (IP Code)

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