May 7, 2004—Siemens Building Technologies has developed two new CD tools to help customers understand variable frequency drive (VFD) technology for HVAC applications, and to provide a simple method of calculating harmonic voltage and current distortion when using VFDs in building applications.
The VFD “A to Z” CD-ROM is an educational tool that explains Siemens SED2 VFD capabilities. It includes multimedia presentations and technical training videos on the SED2 family of products, conventional and e-bypass options, harmonics basics, and a documentation library.
The SED2 Harmonee—Harmonics Calculator Tool CD is a powerful harmonics analysis tool that provides comparative and critically important data on the full harmonic spectrum and harmonic order values. It compares expected results with worldwide harmonics standards including IEEE519-1992 and gives the user the ability to compare harmonics generated by other comparable 6-pulse drives versus the Siemens SED2 VFD product family. It also compares conventional drives with and without the use of filtering devices to reduce harmonics such as line reactors.
More information on both CD tools is available by request from Siemens. For more information on Building Technologies SED2 VFDs, visit online.
