KDR Line Reactors from TCI prevent nuisance tripping and limit expensive downtime. KDR Line Reactors also reduce harmonic current, which increases the life of AC Drives and protects sensitive equipment.
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 cause system-wide problems, including:
- Transformer and distribution equipment overheating
- Random breaker tripping
- Sensitive equipment may fail completely
- 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
Harmonic Current without KDR
Harmonic Current with KDR
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 over-voltage 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.
Voltage before KDR
Voltage after KDR
UNBALANCED DISTRIBUTION SYSTEMS CAUSE NUISANCE TRIPPING
Input voltage phase unbalance may prevent the drive from performing due to subsequent over-current 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.
IMPACT OF ADDITIONAL AC LINE REACTANCE ON THE DC BUS VOLTAGE OF A MOTOR DRIVE
Adding AC Line Reactance can be beneficial to the drive as it lowers the input current THD and peak diode current.
DIN RAIL LINE REACTOR OPTION
For smaller applications incorporate DIN Rail Drive Reactors to the input and output of PWM drives for easy installation and superior performance:
- Reduce installation time and cost
- Compatible with any 35mm DIN Rail
- Mounts to “Standard Stell High Profile” or “Heavy Duty Steel” DIN Rails
- Reactor mounts horizontally on horizontal DIN Rail
- Improve organization of reactors and their cabling
- RoHS compliant
SINGLE-PHASE LINE REACTOR APPLICATIONS
KDR Line Reactors can be used in single-phase applications. Please note that the level of impedance will be reduced from three-phase levels. Contact Technical Support at 866-635-0296 for more information.
- Impedance Options
|Product Series/Model #||KDRULA6LE3R|
|Impedance Protection||High “Z”|
|Enclosure Rating||UL Type 3R Enclosed|
|Ambient Temperature||40° C (104° F)|
|Max. Altitude||2,000 meters (6,000 feet); Derating necessary above 2,000 meters|
|Fundamental Frequency||50/60 Hz|
|Short-Term Overload Rating||Tolerate 200% rated I for a minimum of 3 minutes|
|Approvals||cUL, UL; UL Recognized, CE Marked|
|Inductance Characteristics||Minimum 95% L at 110% Load
Minimum 80% L at 150% Load
|Input and Output||Available for either line or load side of a VFD|