Typical Problems, Superior Solutions with KDR
Power quality has degraded over time due to the increased use of non-
Harmonics and Power Quality
Variable frequency drives are beneficial to a wide range of applications, but contain
a power conversion process that creates current and voltage distortion which can
• Poor power factor
• Reduced system efficiency
KDR Optimized Line Reactor on Harmonics
The addition of a KDR Reactor will reduce harmonic content, which reduces the total RMS current, thereby improving the total power factor.
• Nuisance tripping is less common
• Drive uptime is increased
• Power factor is improved
Transient Voltages cause Nuisance Tripping
A voltage transient, commonly caused by capacitor bank switching (or other issues), sends a current surge into the VFD bus capacitor. The additional current raises bus voltage, thus causing a drive fault (trip). In addition, this overvoltage condition will cause the drive to shut down in order to protect its components.
KDR Optimized Line Reactor on Transient Voltages
The additional impedance offered by the KDR Line Reactor slows down the current surge, thus reducing the likelihood of the drive tripping offline.
Unbalanced Distribution Systems cause Nuisance Tripping
Input voltage phase unbalance may prevent the drive from performing due to subsequent overcurrent conditions which cause the drive to cease operating.
KDR Optimized Line Reactor on Unbalanced systems
The addition of a KDR Reactor to the input of every drive will help balance the drive input line currents.