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Your contact: +49 - 212 8804-0 • info@reo.de

REOHM BW 151

Braking resistor, max. continous power: 300 W

REOHM BW 151

Unique Selling Point


  • Very flat and compact construction with notches for a vertical mounting
  • Easy installation
  • Short-circuit proof
  • Suitable for the use with any frequency drive
  • Use even in rough conditions
  • Good heat dissipation, assembly on heat sink possible
  • Highly resistive on overload

Description


The braking resistor BW 151 is short-circuit proof and has a very good heat dissipation. Braking resitors of REO protect the machine from a voltage rise in the intermediate circuit. 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 UL-certified and have a power of 50 W up to 30 W (also as 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


Technical Data


  • Resistance values : 1,1 - 2000 Ohm
  • Continuous power : 50 - 300 W
  • max. operating voltage : 900 V

Circuit example

Your contact: +49 - 212 8804-0 • info@reo.de

REOHM BW 151

Braking resistor, max. continous power: 300 W

Technical data

 

Type

Resistance values
R [Ohm]

Continous output
 [ W ]

max. operating voltage
U [ V ]

BW 151 / 50

1,1 - 200

50

900

BW 151 / 100

3 - 300

100

BW 151 / 150

4 - 300

150

BW 151 / 200

5-1000

200

BW 151 / 250

5-1000

250

BW 151 / 300

7-2000

300

 

Higher power ratings on request

Note

The ratings apply for 100 % duty cycle and free access and exit of cooling air.

In general: Is the ambient temperature higher than 40 °C, the continuous power must be reduced by 5 % per 10 K temperature rise.

Your contact: +49 - 212 8804-0 • info@reo.de

REOHM BW 151

Braking resistor, max. continous power: 300 W

Dimension drawings

Dimensions

Type

B1 [mm]

B2 [mm]

H1 [mm]

L1 [mm]

L2 [mm]

L3 [mm]

D [mm]

Connections

BW 151 / 50 /...

80

60

14

70

50

250

4,2

2 x AWG 18,UL 1659

BW 151 / 100 /...

80

60

14

110

80

250

4,2

2 x AWG 18,UL 1659

BW 151 / 150 /...

80

60

14

160

130

250

4,2

2 x AWG 18,UL 1659

BW 151 / 200 /...

80

60

14

210-216

180

250

4,2

2 x AWG 18,UL 1659

BW 151 / 250 /...

80

60

14

260

230

250

4,2

2 x AWG 18,UL 1659

BW 151 / 300 /...

80

60

14

310

280

250

4,2

2 x AWG 18,UL 1659

Other mounting-variations possible as customization

Your contact: +49 - 212 8804-0 • info@reo.de

REOHM BW 151

Braking resistor, max. continous power: 300 W

Surface temperature as a function of load

Surface temperature REOhm 151 / 100

Surface temperature increase, even over temperature, describes the increase in surface temperature when loaded.

 

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.