uk

Damping Resistors

Damping resistors for a higher level of functional safety and service life

REO damping resistors can absorb and temporarily store higher impulse loads.

Thanks to the special winding technology, the wires of the damping resistors are separated spatially and therefore ensure a higher dielectric strength.

REO damping resistors are available in the protection classes IP00 to IP 65 and provide a high level of functional safety and service life.

Additional advantages:

- Higher level of mechanical protection

- Quiet

- Low susceptibility to vibrations and oscillations

  • REOhm series NTT R 159

    Max. continous power: 1600 W

    BW 156
    • Continuous power: 1600 W
    • max. operating voltage: 4000 V

    The REOhm NTT R 150 resistors are used for example in railway engineering, electric vehicles or commercial vehicles as charging or damping resistors (even as braking resistors up to 100 kw power). They are used to damp over-voltages or to dissipate excess energy that originates, for example, on braking or starting up. This is done by converting the electrical energy into heat in the resistor.


    Moreover, the resistor is very well protected against mechanical loads. This ensures a long-term functional reliability. Only railways-approved, high-quality raw materials are used for the REOhm NTT R 150 series. The connecting leads and all the other components are specially designed for the railway application. Only materials with railway approval are used.


    Applications: 



    • Railway engineering

    • Electrical vehicles


     


    Type tests: 


     Stresses



    • Testing according to BN 411 002 (DIN EN 50155 point 10.2)

    • Climatic testing

    • Testing Db: moist heat, cyclical (12 + 12 hours cycle) Variant 1

    • according to DIN EN 60068-2-30

    • (DIN EN 50155 Point 10.2.5)


    Mechanical testing



    • Tests for vibrations and shocks according to DIN EN 61373, Category 1 Class B

    • Testing with undefined assembly position under the most stringent conditions in every axis.

    • Simulated service life test through increased broadband noise (Point 9 DIN EN 61373)

    • Shock test (point 10 DIN EN 61373)

    • Corrosion test

    • Testing Ka: salt spray according to DIN EN 60068-2-11 (DIN EN 50155 point 10.2.10)


    Moreover the type test also includes:



    • heating-up measurement

    • high-voltage test

    • insulation measurement (DIN EN 50155 point 10.2.9)

    • measurement of the resistance value

    • visual inspection (DIN EN 50155 point 10.2.1)

  • REOHM series 154

    Max. continous power: 200 W

    BW 156
    • Resistance values: 2,2 - 500 Ohm
    • Continuous power: 50 - 200 W
    • max. operating voltage: 900 V

    The braking resistor REOHM 154 protects the machine from a voltage rise in the intermediate circuit, if an electric machine operates as a generator (Electromotive brake). The current reduces also the speed of the machine. 


    The serie REOHM 154 is available as braking resistor (series BW) or as charging resistor (series R).


    As 154 R (Charging resistor, damping resistor, filter resistance, etc.)


    The charging resistor is a current limiting resistor for the charging and discharging of capacitors and limitates for example the current flowing into the intermediate circuit capacitor inrush current. For this 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, so wirewound resistors are the right choice.


    Typical Applications: 



    • Drive Technology

    • Renewable energy

    • Electromobility


     


    Maximum energy with minimum space



    • The compact design enables the use in all applications where
      little space is available (for example in cabinet and frequency converter)

    • Unity-Version can be assem-bled as low-profile and upright

    • In case of failure of resistor, this will become highly resis-tive

    • Test voltage: 2,5 kV AC (at 900 V rated voltage)



    Optional



    • With temperature switch

    • Cover for protection against high surface temperatures



  • REOHM series 155

    Max. continous power: 3.000 W

    BW 156
    • Resistance values: 0,5 - 1440 Ohm
    • Continuous power: 500 - 3500 W
    • max. operating voltage: 900 - 4200 V

    Braking resistor for drives with frequency converters of medium to high power.
    Mounting inside and outside the control cabinet is possible.



    • degree of protection: IP20 / IP65 / IP66

    • test voltage: 2.5 kV AC

    • ambient temperature: 10+40 ºC

    • other services on request

    • other fastenings on request

  • REOHM series 155 - Combination

    Max. continous power: 30.000 W

    BW 156
    • Resistance values: 0,8 - 820 Ohm
    • Continuous power: 4000 - 30000 W
    • max. operating voltage: 900 V

    As BW (Braking resistor)


    When an electric machine operates as a generator (Electromotive brake), the brake resistor protects the machine from a voltage rise in the intermediate circuit. The current reduces als the speed of the machine. 


    As R (Charging resistor, damping resistor, filter resistance, etc.)


    The charging resistor is a current limiting resistor for the charging and discharging of capacitors and limitates for example the current flowing into the intermediate circuit capacitor inrush current. For this 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, so wirewound resistors are the right choice.


     


    Maximum energy with minimum space



    • This braking resistor of the REOHM series is very compact with high capacity

    • Maximum energy is provided in smallest space and very high protection rating

    • The resistor is to be as-sembled vertically with the terminal box at the bottom

    • Sufficient convection is to be ensured

    • Ratings higher than 22kW require a separate terminal box

    • Test voltage: 2,5 kV AC (at 900 V rated voltage

    • Ambient temperature: -10...+40°C

    • Max. temperature: >300°C



    Optional



    • With temperature switch

    • Cover for protection against high surface temperatures



  • REOHM series 156

    Max. continous power: 1.500 W

    BW 156
    • Resistance values: 1 - 1000 Ohm
    • Continuous power: 400 - 1500 W
    • max. operating voltage: 1000 V

    Resistances of REOHM Series 156 are characterized by their high power density with a small mounting area. Due to their high degree of protection up to IP66  they can be used even in particularly aggressive environmental conditions  (eg salt spray). The resistors are available as braking resistors , charge-, attenuation,- and filter resistors or as UL version.


    As BW (Braking resistor)


    When an electric machine operates as a generator (Electromotive brake), the brake resistor protects the machine from a voltage rise in the intermediate circuit. The current reduces als the speed of the machine. 


    As R (Charging resistor, damping resistor, filter resistance, etc.)


    The charging resistor is a current limiting resistor for the charging and discharging of capacitors and limitates for example the current flowing into the intermediate circuit capacitor inrush current. For this 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, so wirewound resistors are the right choice.


    As UL version


    In addition to the high protection class IP66, the profile resistors REOHM 156 are also UL-certified and have a power of 50W up to 7.500 W (as combination).


     


    Maximum energy with minimum space



    • This unit is very compact with high power

    • In case of failure of resistor, this will become highly resistive.

    • Suitable for IP 66 applications

    • Test voltage: 2,5 kV AC (at 900 V rated voltage)


    Optional



    • With temperature switch

    • Cover for protection against high surface temperatures



  • REOHM series D 158

    Max. continous power: 60.000 W

    BW 156
    • Resistance values: 2,5 - 850 Ohm
    • Continuous power: 1000 - 60000 W
    • max. operating voltage: 1000 V

    The series D 158 can be used as braking or load resistor for drive technology, industrial applications, test fields, E-Mobility and railway engineering with integrated water cooling. Thanks to localised, optimised cooling, high outputs can be generated in the smallest space with low heat generation. It is also possible to deploy it in areas with high ambient temperatures.


    The resistors are available as braking-, load-, or highvolt resistors.


    Applications:



    • Drive technology, frequency converters

    • Railway

    • E-Mobility

    • Test systems


     


    Maximum energy with minimum space



    • Protection IP20 up to IP66

    • Test voltage 2,5 kV AC

    • Ambient temperature: -15 to +80ºC

    • Other fixing points or power ratings on request



    Optional



    • With temperature switch


     

  1. Page:
  2. 1
  3. 2

Downloads

  • Download
    Protection Ratings
    pdf

    Protection Ratings

    Discover our brochure about high protection ratings!
    Download