3-Phase Output Reactors RWK305

3-Phase Output Reactors 3-Phase Output Reactors RWK305

Three-phase dv/dt Reactor for Efficient Motor Protection

3-Phase Output Reactors RWK305

Three-phase dv/dt Reactor for Efficient Motor Protection

  • 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 1100 A
  • UL rated materials used

Features and Benefits

Efficient reduction of high output voltage dv/dt from IGBT motor drives
Protection of motor coil insulation from premature aging and destruction
Significantly increased servie life of electric motors
High reliablility and secured production up time for mission critical applications
Reduced converter pulse load
Less interference propagation towards neighboring equipment of lines
„Output filter“ with low impedance, ideal for processes requiring exceptional pre- cision and reproducibility of movements
Vacuum impregnation for reduced humming noise and high durability

Typical Applications

Servo drives
Close loop vector drives
Motor drive applications with short motor cables
Machinery comprising servo or torque motors
Pick and place machines

Technical Specifications

Maximum continuous operating voltage

3 x 500/288 VAC

Motor frequency

60 Hz

Switching frequency

2 to 16 kHz

Rated currents

4 to 1100 A @ 40°C

Motor cable length

30 m max. @ 16 kHz (derating curve next page)

Impedance (uk)

0.8% @ 400 VAC, 50 Hz and rated current

Typical dv/dt reduction

≥factor 5

High potential test voltage

P –> E 3000 VAC for 3 sec

P –> P 3000 VAC for 3 sec

Protection category

IP 00 (KL types according to VBG 4)

Overload capability

2 x rated current at switch on for 30 seconds

1.5 x rated current for 1 minute, once per hour

Temperature range (operation and storage)

-25°C to +100°C (25/100/21)

Insulation class

T40/N (200°C) for ≤182 A types

T40/F (155°C) for ≥230 A types

Flammability corresponding to

UL 94 V-2 or better

Design corresponding to

EN 61558-2-20 (VDE 0570-2-20), UL 508C, CSA C22.2 NO. 14

MTBF @ 45°C/480 V (Mil-HB-217F)

>500,000 hours

Typical electrical schematic

3-Phase Output Reactors RWK305

Approvals & Compliances

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

UL 508C up to 182 A. For use with AC or DC drives (power conversion equipment) only