The filter is dimensioned to reduce the THD (Total Harmonic Distortion) in B12 rectifiers. The harmonic currents are so strongly suppressed that a THD of less than 5% is achieved (eg in UPS systems).

Unique Selling Point

  • Reduction of the THDI valuE
  • Low voltage drop
  • Increasing network stability
  • Reduction of input current up to 30%
  • Suitable for installation in control cabinets
  • Easy integration into existing systems
  • Increased reliability of electrical installations
CNW 897
Technical Details

The typical values ​​of the total harmonic distortion with B12 rectifiers and the use of transformers are between 12 and 13%. This corresponds to the standards EN 61000-3-4 and EN 61000-3-12.

If stricter conditions are defined for the network, REO harmonic filters of type CNW 897 must be used in addition to the transformer. These are available in two versions:

  • THD <5%
  • THD <10%
Circuit example

The IP00 version is especially suitable for control cabinet installation and can be installed to save space. The CNW 897 helps to comply with the international power quality standards IEEE 519 or EN 61000-3.

Typical applications

  • Drive technology for motor drives, e.g. B.
  • mechanical engineering
  • Elevators / escalators
  • pump
  • Conveyor technology
  • Ventilation and air conditioning technology
  • Robotics
  • Automation technology
  • Power supplies
  • fail-safe processes
  • Applications with 12-pulse rectifier
Technical Details
Nominal voltage400V
Rated current25 – 600 A
Inductance of the choke0.2 – 2.9 mH
Insulation classT40 / F
Climate categoryDIN IEC 60068-1
Degree of protectionIP00/NEMA1
StandardsIEEE 519, EN 61000-3-12, EN 61000-3-2, IEC 61000-3-4