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Resistencias de frenado

NO TODAS LAS RESISTENCIAS DE FRENADO SON LAS MISMAS -

REOhm es la respuesta para la tecnología moderna con convertidores

Cuando un motor eléctrico funciona como un generador (freno electromotivo), la resistencia de frenado protege la máquina contra picos de corriente en el puente de CC. Asimismo, la disminución de la corriente produce una disminución de la velocidad del motor que ayuda a frenar la máquina.
Las resistencias de frenado REO consiguen una mayor disipación del calor y un mayor comportamiento dinámico mediante el llenado de material conductor de calor alrededor del componente bobinado. Las resistencias REO son a prueba de cortocircuitos, garantizan un elevado nivel de seguridad y están probadas contra sobrecargas en el caso de cargas puntuales para sus aplicaciones (p ej. iIngeniería eólica, ingeniería ferroviaria e ingeniería de automoción). 

  • REOHM BW 151

    Braking resistor, max. continous power: 300 W

    BW 156
    • Valores de resistencia: 1,1 - 2000 Ohm
    • Potencia constante: 50 - 300 W
    • max. operating voltage: 900 V

    Braking resistor for drives with frequency converters
    of low to medium power or as a charging resistor.
    Mounting close to the frequency inverter.



    • protection class IP 20 / IP 54

    • higher protection classes on request

    • test voltage 2.5 kV AC

    • other capacities and mounting dimensions on request

  • REOhm series 156 (UL)

    Max. continous power: 7.500 W

    BW 156
    • Valores de resistencia: 0,3 - 2000 Ohm
    • Potencia constante: 400 - 7500 W
    • max. operating voltage: 900 V

    The BW 156 braking is designed for drives with frequency converters of small to medium output. Installation in and outside the control cabinet is possible.
    In addition to the high protection class IP66, the profile resistors REOHM 156 are also UL-certified and have a power of 50 W up to 7.500 W (as combination).


     


    Optional



    • With temperature switch

    • Cover for protection against high surface temperatures



  • REOHM series 154

    Max. continous power: 200 W

    BW 156
    • Valores de resistencia: 2,2 - 500 Ohm
    • Potencia constante: 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
    • Valores de resistencia: 0,5 - 1440 Ohm
    • Potencia constante: 500 - 3500 W
    • max. operating voltage: 900 - 4200 V

    Due to their high protection class up to IP66, the resistors of the REOHM 155 series are particularly suitable for aggressive environments.Better heat dissipation and better dynamic behaviour of the resistors have been achieved by filling heat conducting material surrounding the wound body. The resistors of the series 155 are available as braking resistors, charging resistors or high-voltage resistors. 


    As BW (Braking resistor)


    When an electric machine operates as a generator (Electromotive brake), the braking 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 high-voltage resistors


    REO high-voltage resistors are designed, produced and certified especifically 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 and high quality materials, together with the complete encapsulation in profile design allows protection ratings up to IP66. 


    Maximum energy with minimum space



    • This unit is very compact with high power

    • Suitable for IP 65 applications

    • Capacity can be doubled by fan that is provided with screw thread

    • In case of failure of resistor, this will become highly re-sistive

    • 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 330

    Watercooled, max. continous power: 60.000 W

    BW 156
    • Valores de resistencia: 1,4 - 43,5 Ohm
    • Potencia constante: 15000 - 60000 W
    • max. operating voltage: 800 V

    The REO braking resistor D 330 converts excess braking energy into useful heat and is thus ideally suitable for electrical or hybrid drives.  The water cooling makes an additional space saving of up to 88% possible as compared to a traditional air-cooled braking resistor.  As an extra feature, the resistor can easily be connected with drip-free quick fasteners. Due to a very high performance even in confined spaces the BWD 330 is ideal for the use in wind power technology, too. Harsh environmental conditions, such as salt spray are no problem with the high protection degree up to IP 69K.


    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.


    Applications



    • Electrical or hybrid drives

    • Wind power

    • Industrial applications


     


    Maximum energy with minimum space



    • Protection IP67 to 69 K

    • Test voltage 2,5 kV AC

    • Other power ratings on request



    Optional



    • With temperature switch




  • REOHM series 155 - Combination

    Max. continous power: 30.000 W

    BW 156
    • Valores de resistencia: 0,8 - 820 Ohm
    • Potencia constante: 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



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