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

CNW MD 854

Liquid-cooled three-phase motor choke 2% Uk

CNW MD 854

Unique Selling Point


  • Low surface temperature
  • Up to 80% power dissipation with water cooling
  • Compact design
  • Protection against dust, moisture
  • Protection for electrical consumers
  • Limit the voltage rise to < 200V/µs
  • Extended service life of electrical consumers
  • Reduce motor noise
  • Low leakage currents on the motor
  • Longer motor cables possible
  • Production possible according to
    UL insulation system E251513

Description


Voltage rise (<200V / us) and current distortions reduce - protect electrical consumers optimally. The motor choke reduces the voltage rise and the voltage spikes between the conductors. Furthermore, the current is smoothed.

By efficiently cooling the power losses is dissipated up to 80% in cooling and reduces heating of switching cabinets. The targeted derivative of the losses via the cooling circuit prevents that losses are discharged into the environment. By using water cooling the temperatures in the components can be reduced greatly - this means less stress for the insulation materials and a longer service life.

Losses and heating are minimized and the leakage current reduced. Longer motor cable lengths are possible. By limiting the rate of voltage rise, the motor insulation is protected and thus prolongs the life. The motor choke also attenuates the conducted interference in lower frequency range very good. The losses and the typical noise in the motor plate can be reduced. Increasing the service life of motors, reduction of edge steepness dv / dt to earth and between phases, reduce motor noise, current smoothing.

  • Rated voltage: U ≤ 3 x 400 V
  • Reduce the voltage rise dv / dt to < 200V/µs
  • Field frequency: 0 - 60 Hz
  • Drive switching frequency: up to 150 A >4kHz, from 150 A >1,5KHz
  • According to: EN 60289 / EN 61558
  • Test voltage: L-L 2500 V, AC/50Hz 60s; L-PE 2500 V, AC/50Hz 60s
  • Insulation class: T40/F
  • Protection rating: IP00
  • Climatic categorie: DIN IEC 60068-1
  • Ambient temperature: 40 °C
  • Cooling medium: Water/Glycol (70/30 %)
  • Max. Coolant outlet temperature: 50° C
  • Flow rate: min. 3,6 l/min.
  • Pressure drop: <0,5 bar

 

Typical applications

  • Drive systems for motor drives:
    • Mechanical engineering
    • Elevators / escalators
    • Pipes
    • Conveyor technology
    • Ventilation and air conditioning
    • Robotics
    • Automation technology
  • Power supplies
  • Wind turbines

Technical Data


  • Nominal Voltage : 400 V
  • Rated current : 200 - 1200 A
  • Inductance per strand : 0,012 - 0,074 mH

Circuit example

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

CNW MD 854

Liquid-cooled three-phase motor choke 2% Uk

Technical data

Type

Rated voltage
[V]

Rated current
[A]

Uk

Linear
up to

Inductance
[mH]

R20
[mΩ]

Winding weight
 [kg]

CNW MD 854/200

3 x 400
(optional 3x690)

200

2%

300

0,074

0,76

2

CNW MD 854/400

400

600

0,037

0,35

3

CNW MD 854/600

600

900

0,025

0,24

4

CNW MD 854/800

800

1200

0,018

0,18

5

CNW MD 854/1000

1000

1500

0,015

0,16

5

CNW MD 854/1200

1200

1800

0,012

0,11

5

 

 

Dimension drawings 

 

Dimensions

Type

A
[mm]

B
[mm]

C
[mm]

Weight
[kg]

Braced

CNW MD 854/200

380

295

200

38

CNW MD 854/400

380

305

205

45

CNW MD 854/600

380

355

240

57

CNW MD 854/800

380

385

255

67

CNW MD 854/1000

380

400

260

77

CNW MD 854/1200

380

445

275

90

Unbraced

CNW MD 854/200

380

290

200

35

CNW MD 854/400

380

300

205

43

CNW MD 854/600

380

350

240

55

CNW MD 854/800

380

380

255

65

CNW MD 854/1000

380

395

260

75

CNW MD 854/1200

380

440

275

87