Load and discharge resistors
The current limiting resistor for your capacitor
The charging resistor is a current limiting resistor for the loading and discharge of capacitors and limits for example the inrush current that flows into the intermediate circuit capacitor.
The device must be laid out for a high level of single pulse energy and nominal voltage for this purpose. The inductance of the resistor also contributes to the limiting of the inrush current, for this reason REO wire resistors are the correct choice.

REOhm R 152
Load and discharge resistor, max. continuous power: 330 W
 Resistance values: 3  620 Ohm
 Continuous power: 120  330 W
 max. operating voltage: 900 V
The load and discharge resistors of REO are used to damp overvoltages or to dissipate excess energy that originates, for example, on braking or starting up. Typical areas of application are the use as a resistor for charging the intermediate circuit capacitance, as a braking or load resistor.
Typical Applications:
 Drive Technology
 Renewable energy
 Railway engineering
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 IP20IP54 applications
 Test voltage: 2.5 kV AC (at 900 V rated voltage)
Optional
 With temperature switch
 Cover for protection against high surface temperatures

REOHM R 151
Load and discharge resistor, max. continuous power: 300 W
 Resistance values: 1.1  2000 Ohm
 Continuous power: 50  300 W
 max. operating voltage: 900 V
The charging resistor R 151 is a current limiting resistor for the charging and discharging of capacitors and limits, for example, the current flowing into the intermediate circuit capacitor inrush current. They are available as a braking resistor (BW Series) or as a charging resistor (Series R).
Typical Applications:
 Drive Technology
 Wind power, solar energies
 Railway engineering
 Electromobility
Available as UL version
The profile resistors REOhm 151 are also ULcertified and have a power of 50 W up to 30 W (also as a combination).
Maximum energy with minimum space
 In case of failure of resistor, this will become highly resistive.
 Suitable for IP20  IP54 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 153
Max. continuous power: 360 W
 Resistance values: 7  620 Ohm
 Continuous power: 160  360 W
 Dauerleistung: 80 230 W
 max. operating voltage: 900 V
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 also reduces 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 wire wound resistors are the right choice.
As UL version
In addition to the high protection class IP66, the profile resistors REOhm 153 are also ULcertified and have a power of 100 W up to 400 W (also as a combination).
Maximum energy with minimum space
 Unityversion can be assembled as lowprofile and upright
 Suitable for IP 65 applications
 The REO flat resistor can be screwed under or on
the side of a frequency drive using a mounting plate  In case of failure of resistor, this will become highly resistive
 Test voltage: 2.5 kV AC (at 900 V rated voltage)
Optional
 With temperature switch
 Cover for protection against high surface temperatures

REOHM series 154
Max. continuous power: 200 W
 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 also reduces the speed of the machine.
The series REOHM 154 is available as the braking resistor (series BW) or as the 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 wire wound 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)  UnityVersion can be assembled as lowprofile and upright
 In case of failure of resistor, this will become highly resistive
 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. continuous power: 3,000 W
 Resistance values: 0.5  1440 Ohm
 Continuous power: 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 behavior 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 highvoltage 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 also reduces 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 highvoltage resistors
REO highvoltage 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 railwaycompatible and highquality 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 resistive
 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  Combination
Max. continuous power: 30,000 W
 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 with 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 assembled 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