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Your contact: +1 (317) 899-1395 • info@reo-usa.com

REOHM series 155

Max. continuous power: 3,000 W

REOHM series 155

Unique Selling Point


  • Small dimensions
  • Fast connection
  • Matching to any frequency converter
  • Less additional mounting area required 
  • Optionally for aggressive environments (e.g. saltwater)
  • Optionally with cover and temperature switch 
  • Protection class up to IP 66
  • Certified for railway engineering

Description


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 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 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 high-voltage resistors

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 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

Technical Data


  • Resistance values : 0.5 - 1440 Ohm
  • Continuous power : 500 - 3500 W
  • max. operating voltage : 900 - 4200 V

Circuit example

Your contact: +1 (317) 899-1395 • info@reo-usa.com

REOHM series 155

Max. continuous power: 3,000 W

Technical data

Type

Resistance value
R [Ohm]

Continuous power
P [W]

max. operation voltage
U [V]

155 / 1,000

1 - 1,000

1,000

900

155 / 1,200

10 - 300

1,200

155 / 1,500

0.6 - 280

1,500

155 / 2,000

0.5 -1,440

2,000

155 / 2,500

4 - 600

2,500

155 / 3,000

4 - 750

3,000

 

Type

Resistance value
R [Ohm]

Continuous power
[W]

max. operation voltage
[V]

155 / 500

1 - 1,000

500

4,200

155 / 600

10 - 300

600

155 / 750

0.6 - 280

750

155 / 1,000

0.5 -1,440

1,000

155 / 1,250

4 - 600

1,250

155 / 1,500

4 - 750

1,500

Higher power ratings on request

  

Your contact: +1 (317) 899-1395 • info@reo-usa.com

REOHM series 155

Max. continuous power: 3,000 W

Dimension drawings



Dimensions

Type

B1

[mm]

B2

[mm]

H

[mm]

L1

[mm]

L2

[mm]

L3

[mm]

D

[mm]

Connection wire**

155 / 1,000

175

165

75

182

120

250

6.5

IP 40
PTFE AWG14
IP54/64/65
shielded connecting
wire 3x1.5mm²

155 / 1,200

175

165

75

242

180

250

6.5

155 / 1,500

175

165

75

342

280

250

6.5

155 / 2,000

175

165

75

542

500

250

6.5

155 / 2,500

175

165

75

672

630

250

6.5

IP 40 PTFE AWG12 IP54/64/65
shielded connecting
wire 3x2.5mm²

155 / 3,000

175

165

75

762

720

250

6.5

Other fixing dimensions possible

** For small resistance values the conductor cross-section will be adjusted to the current.

Your contact: +1 (317) 899-1395 • info@reo-usa.com

REOHM series 155

Max. continuous power: 3,000 W

Touch protection

 

Dimensions

Type

L1

[mm]

L2

[mm]

L3

[mm]

B1

[mm 

B2

[mm]

H

[mm]

D

[mm]

155 / 1,000

470

440

410

275

225

200

7.0x10.0

155 / 1,200

530

500

470

275

225

200

7.0x10.0

155 / 1,500

630

600

570

275

225

200

7.0x10.0

155 / 2,000

830

800

770

275

225

200

7.0x10.0

155 / 2,500

960

930

900

275

225

200

7.0x10.0

155 / 3,000

1,050

1,020

990

275

225

200

7.0x10.0

Your contact: +1 (317) 899-1395 • info@reo-usa.com

REOHM series 155

Max. continuous power: 3,000 W

Load diagram 

The power ratings apply for continuous duty. The power ratings can be increased in short-time operation in function of duty cycle by multiplication with the relevant factor from the diagram below or according to the formula as follows.