3-Phase Output Reactors RWK5420

3-Phase Output Reactors 3-Phase Output Reactors RWK5420

Output dv/dt reactor 6% for motor drives

3-Phase Output Reactors RWK5420

Output dv/dt reactor 6% for motor drives

  • Reduction of drive output voltage dv/dt
  • Reduction of motor temperature
  • Increase of motor service life
  • Compact and economic open frame design
  • Standard catalog reactors up to 1000 A
  • UL rated materials used

Features and Benefits

Converts the rectangular PWM output voltage of motor drives into a smooth sine wave with low residual ripple
Elimination of premature motor damage caused by high dv/dt, overvoltages, cable ringing, motor overheating, and eddy current losses
Improves bearing life time because of bearing currents caused by circulating currents
Complies with IEC 60034-17* requirements for general purpose motors
Optional with IP20 protective cover

Typical Applications

HVAC applications
Medium voltage applications, deployed in front of the step-up transformer
Retrofit installations with motor drives
Motor drive with long motor cable
Motor drive with multiple motors in parallel

Technical Specifications

Nominal operating voltage

3x480 VAC

Rated operating voltage

3x530 VAC

Rated currents

2.3 to 1000 A @ 45°C

Switching frequency fPWM

0 to 16kHz

Impedance (uk)

6% @ 400 V, 50 Hz and rated current

Motor cable length

Max. 100m depending of switching frequency (see user manual)

Overvoltage category

III acc. IEC 60664-1

Pollution degree


High potential test voltage

P –> E 2480 VAC, 1 s

Protection category


Overload capability

1.5× rated current for 1 minute, once per hour

Ambient temperature range

-40°C to +45°C fully operation

+45°C to +100°C derated operation*

-40°C to +100°C transport and storage

Design corresponding to

Chokes: EN 61558-2-20 or EN 60076-6

Climatic class


MTBF @ 45°C/480 V (Mil-HB-217F)

>500,000 hours

Flammability corresponding to


Rated currents

2.3 to 1000 A @50°C

* Iderated = Inominal*√((Tmax-Tamb)/(Tmax-Tnominal)) = Inom*√((100°C-Tamb)/25°C)

Typical electrical schematic

3-Phase Output Reactors RWK5420

Approvals & Compliances

CE Label
UKCA Label
RoHS Label
UL Recognized Label (USA)

For use on PWM side of AC or DC drives (power conversion equipment) only