TransportationConverter Solutions

TransportationConverter Solutions

SAFE AND STANDARDISED PRODUCTS FOR RAILWAY ENGINEERING

The safety of passengers and the compliance of railway standards is of the utmost importance in this market. Most applications demand that components must be adapted to the local environmental and operating conditions. High quality standards and continuous developments ensure that that REO is a reliable partner within this sector.

To guarantee compliance with railway norms, standards and the classification of Ingress Protection the following methods are used:

  • In-house testing laboratories
  • Shock and vibration tests
  • Cooperation only with selected suppliers
  • FEM analysis for the simulation of environmental influences


For railway technology REO offers inter alia:

  • NTT BW – Braking, smoothing and filter resistors
  • NTT – Mains chokes, motor chokes, interference chokes, absorption circuit choke, EMC chokes, dv/dt chokes, AC/DC chokes
  • RFI filter, sinusoidal filter, harmonic filter
  • NUT – inverter transformers AC transformers, power transformer, HF transformer, current transformer, special components for energy generation
  • NPT – test chokes for load test of frequency converters
  • REOLAB mobil – mobile power supply for the railway workshop
  • REOLAB – test devices for duration and function tests

All components for the railway technology - from transformers and chokes up to filters - are developed as a standard design or in accordance with the specific requirements of our customers. Without this specific, essential requirements, no product can operate:

  • Safety: to ensure that the safety and comfort of passengers are not impaired, every component used in a train must meet the current norms and standards. Own tests and accredited testing laboratories prove the safety of our components. 
  • Weight: Intelligent methods in materials selection and FEM-calculation mean that REO components are of particularly low weight. 
  • Space : The optimal use of space, and compliance with specified mechanical and electrical requirements, form the basis of our development work. 
  • Costs: With the latest software, simulation and testing techniques, we ensure that the necessary development work is already optimally used in advance. 
  • NTT LD-DH 100

    Directly cooled surge current choke

    NTT LD-DH 100
    • Nominal Voltage: 3000 V
    • Rated current: 500 - 2500 A

    The current limiting inductor limits the short-circuit current in a bridge circuit. Thus, the intermediate circuit is protected and prevents the destruction of the connected semiconductor devices. Usually IGBT‘s.



    • According to: EN 60076-6

    • Test voltage: 12kV

    • Overload: 1,5 x INenn 1 min / h

    • Climatic categorie: DIN IEC 68 Teil 1 25/085/21


     


    Typical applications



    • Drive technology

    • Wind energy

    • Train technology



  • NTT MD 953

    Liquid-cooled three-phase mains choke 8% Uk

    NTT MD 953
    • Nominal Voltage: 400 V
    • Rated current: 200 - 1200 A
    • Inductance: 0,012 - 0,074 mH

    Watercooled chokes are available are available with ingress protection ratings IP00 to IP65. REO can utilise several methods of water cooling these components. This provides controlled conduction of heat losses, ensuring that the local environment is not heated. Water cooling ensures that component temperatures are greatly reduced, reducing component stress and increasing product life. REO technology provides excellent heat distribution, preventing the emergence of so-called hot spots.



    • Winding material : Aluminum

    • Insulation class: F

    • Cooling medium: Water/Glycol (70/30 %)

    • Max. coolant inlet temperature.: 50° C

    • Flow rate: min. 3,6 l/min.

    • Pressure drop: <0,5 bar


     


    Typical applications



    • AFE Drives



  • NTT UI114-50

    REO TSS choke with iron core

    NTT UI114-50

    As a passive inductive component in power supplies and in power electronics, the buck-converter choke is used for attenuating undesirable frequencies or for saving and storing energy.


    The term buck-converter choke indicates the complete ready-for-use unit containing the choke, air cooling, mounting and connections. The chokes are available with different cores, which enables individual selection depending on the requirement of the application. In addition to iron-based cores, chokes with cores of amorphous alloy are becoming more common, in the form of toroidal cores, cut strip-wound cores or special custom solutions.


    The use of amorphous materials offers an exceptional combination of high satur­ation flux density (1.56 T) and a high permeability. In addition to the high temperature class, further features of amorphous alloy include low hysteresis and eddy-current losses, suitability for the medium-frequency range (<20 kHz) and use for high powers up to 500 kVA.



    • Type of choke: Up/Buck converter choke with iron core

    • Voltage of the system: 500 – 1100 V

    • Max. permissible tolerances: ( -10 % / +10 % )

    • Linearity: min. 0.2 mH @ 230 Aeff

    • Harmonic currents constantly / Superimposed Harmonics: 60 Ass @ 19 kHz

    • Insulation class: H

    • Cooling: AF

    • Protaction rating: IP65/66

    • Rated voltage for insulation: 1200 Vdc

    • Test voltage: 3.5 kV (50 Hz, 60 s)



  • REOHM series NTT R D 158

    Max. continous power: 2600 W

    BW 156
    • Resistance values: 0,1 - 1 Ohm
    • Continuous power: 100 - 1210 W
    • max. operating voltage: 4200 V

    The resistor NTT RD 158 is a water-cooled damping resistor, which is used for traction in railway applications. The resistor is used in series with filter capacitors in the 1.5 kV and 3 kV DC network. 


    For this purpose, the device must be designed for a high single pulse energy and nominal voltage. The inductance of the resistor contributes to limit the inrush current - here are wirewound resistors the right choice.


    The advantage of the resistance unit NTT R D158 is that 4 damping resistors are housed in one unit. This means a compact construction and low cost when connecting the resistor.


    REO high-voltage resistors are designed, produced and certified specifically for the railway technology. The specially designed winding technology allows a higher withstand voltage due to the spatial separation of the wires. The use of railway-compatible, high quality materials, together with the complete encapsulation in profile design lead to protection classes up to IP 65.


    Maximum energy with minimum space



    • Continuous output: 2600 W

    • Max. operating voltage: 4200V

    • Resistance value: 0,1 - 1Ohm

    • Average pulse load: 1x per hour 20kWs - within 100ms

    • Maximum pulse load: 20x per year 120kWs -within 20ms

    • Protection class: IP00-IP65

    • Other ratings upon request


  • REOLOAD mobil

    Mobile three-phase AC and DC resistive load for train technology

    REOLOAD mobil

    Applications:


    Passenger cars no longer have to be shunt to a stationary resis­tive load for inspection purposes – with the REOLOAD mobil the resistive load comes to the car. Auxiliary converters or DC bat­tery chargers can be tested. A 20m long mains cable with safety plug provides a large radius for inspection works and fast pro­cesses.


    A display with control panel is integrated.

  • RUT 500

    Leakage transformer

    RUT 500
    • Rated power: 71000 - 275000 VA
    • Input voltage: 210 - 1660 V

    In railway applications, where it‘s about the greatest possible comfort and safety of passengers, components are required that save space, are safe and have a long service life. Supply interruptions or voltage drops can lead to a range of undesirable effects such as the loss of motor power. 


    The REO leakage transformer ensures harmonized current and voltage outputs, filtering harmonics, and limiting the ripple current.With the spatial separation of the primary and secondary windings and the resulting intentional increase in the magnetic leakage field, the REO leakage transformer achieves a loose magnetic coupling. 


    This results in the combination of the function of a transformer (transforming voltage with galvanic separation) and a current-limiting choke.


     


    Options



    • Various performance classes : 50 kVA , 100 kVA , 150 kVA and 200 kVA

    • Voltage drop 10% uk ,20% , and 30%

    • Voltage ratio /Windings selectable

    • Winding material and optimized insulation degree selectable

  1. Page:
  2. 1
  3. 2
  4. 3

Downloads

  • Download
    Transportation Converter Solutions
    pdf 4.00 KB

    Transportation Converter Solutions

    Efficient components from REO
    Download
  • Download
    Protection Ratings
    pdf 4.00 KB

    Protection Ratings

    Discover our brochure about high protection ratings!
    Download
  • Download
    REO Leakage field transformer
    pdf 4.00 KB

    REO Leakage field transformer

    REO Leakage field transformer
    Download
  • Download
    EMC-Filter Product catalogue
    pdf 4.00 KB

    EMC-Filter Product catalogue

    Product catalogue
    Download
  • Download
    Air chokes Product catalogue
    pdf 4.00 KB

    Air chokes Product catalogue

    Product catalogue REO air chokes
    Download
  • Download
    Resistors Product catalogue
    pdf 4.00 KB

    Resistors Product catalogue

    Product catalogue for Resistors
    Download
  • Download
    Components for railway applications catalogue
    pdf 4.00 KB

    Components for railway applications catalogue

    Product catalogue: REO components for railway applications
    Download
  • Download
    Current and voltage sensors catalogue
    pdf 4.00 KB

    Current and voltage sensors catalogue

    Product catalogue
    Download
  • Download
    Liquid cooled systems catalog
    pdf 4.00 KB

    Liquid cooled systems catalog

    Product catalog for liquid cooled systems
    Download
  • Download
    Braking resistors Overview
    pdf 4.00 KB

    Braking resistors Overview

    REO Braking- and charging resistors The product range at a glance
    Download
  • Download
    REO chokes with high protection ratings
    pdf 4.00 KB

    REO chokes with high protection ratings

    REO chokes with high protection ratings Fully encapsulated REO chokes
    Download
  • Download
    Systems or separate components in railway technology
    pdf 4.00 KB

    Systems or separate components in railway technology

    Systems or separate components in railway technology
    Download

Links