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

REOHM series 156

Max. continous power: 1.500 W

REOHM series 156

Unique Selling Point


  • Compact construction despite of high power
  • Easy installation
  • Short-circuit proof
  • Very good heat dissipation
  • Highly resistive on overload
  • Optionally with contact protection and temperature switch 
  • Optionally for aggressive environements (e.g. salt water)
  • Installation also possible outside the control cabinet

Description


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


Technical Data


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

Circuit example

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

REOHM series 156

Max. continous power: 1.500 W

Technical data

Type

Resistance

[Ohm]

Continous power [W]

Max. operation voltage

[V]

<IP54 / below 1500V

>IP54 / over 1500V

156/400

1 – 1000

400

300

900

 

156/600

1 – 250

600

400

900

156/800

3 – 620

800

500

900

156/1000

1 – 500

1000

600

900

156/1200

5 – 400

1200

700

900

156/1500

10 – 300

1500

800

1000

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 series 156

Max. continous power: 1.500 W

Dimension drawings

Dimensions

Type

L1

[mm]

L2

[mm]

L3

[mm]

L4

[mm]

B1

[mm]

B2

[mm]

H

[mm]

D

[mm]

Connection line

156/400

170

155

140

500

104

70

53

4,5

IP20/40

PTFE AWG14

 

156/600

230

215

200

500

104

70

53

4,5

156/800

300

285

270

500

104

70

53

4,5

156/1000

370

355

340

500

104

70

53

4,5

156/1200

450

435

420

500

104

70

53

4,5

156/1500

600

585

570

500

104

70

53

4,5

 

Type

L1

[mm]

L2

[mm]

L3

[mm]

L4

[mm]

B1

[mm]

B2

[mm]

H

[mm]

D

[mm]

Connection line

156/400

174

159

140

500

104

70

53

4,5

IP54/65

shielded
connection
line

3x1,5 mm²

156/600

234

219

200

500

104

70

53

4,5

156/800

304

289

270

500

104

70

53

4,5

156/1000

374

359

340

500

104

70

53

4,5

156/1200

454

439

420

500

104

70

53

4,5

156/1500

604

589

570

500

104

70

53

4,5

Other fixing dimensions possible 

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

REOHM series 156

Max. continous power: 1.500 W

Design with diferent protection ratings

IP20 / IP40

IP20 / IP40 with temperature switch

 


IP54 / IP65


 

IP54 / IP65 or higher with temperature switch

 

 

 

Protection ratings

Depending on the design and execution various types of protection ratings can be realized up to IP66. At protection ratings less than / equal IP40 the temperature increase must be at the surface resistance max. 300K. For a higher degree of protection (> IP40) a maximum temperature increase of 200K is allowed.

Attention! Duration overtemperature values of> 200 K could result to an impairment of protection rating.

 

Overvoltage protection

It is possible to control the temperature of the resistance by using a temperature switch. In case of exceeding a rated temperature the temperature switch opens and can, for example, trigger an existing signaling contact. The temperature switch is mounted externally in protection class IP20 / IP40 and provided with two connection strands.

At IP54 / IP65 or higher, the temperature switch is integrated in the resistance and provided the connection with a temperature resistant cable.

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

REOHM series 156

Max. continous power: 1.500 W

Touch protection

 

Dimensions

Type

L1

[mm]

L2

[mm]

L3

[mm]

B1

[mm]

B2

[mm

H

[mm]

D

[mm]

156/400

300

270

240

200

150

140

7,0x10,0

156/600

360

330

300

200

150

140

7,0x10,0

156/800

430

400

370

200

150

140

7,0x10,0

156/1000

500

470

440

200

150

140

7,0x10,0

156/1200

580

550

520

200

150

140

7,0x10,0

156/1500

730

700

670

200

150

140

7,0x10,0

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

REOHM series 156

Max. continous power: 1.500 W

Surface temperature as a function of load

Surface temperature BW 156 / 400

 

Surface temperature BW 156 / 600

 

 


Surface temperature BW 156 / 800

 

 

Surface temperature  BW 156 / 100

 

 


Surface temperature BW 156 / 1200

 

 

Surface temperature BW 156 / 1500

 

 

 

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

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

REOHM series 156

Max. continous power: 1.500 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.