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KDR Line Reactors

Extend the life of the motor on the Output

  • Dampen Overshoot Peak Voltage
  • Reduce Motor Heating
  • Reduce Audible Noise

Typical Applications

  • Oil and Gas Pumps
  • Irrigation Fields, Farms
  • Water, Wastewater
  • HVAC
  • Steel Industry
  • Pulp/Paper
  • Machining
  • Extruders
Category:

KDR line reactors reduce harmonic current

  • Increases life of drive
  • Protects sensitive equipment

KDR Line ReactorPower quality has degraded over time due to the increased use of non-linear loads.

Drives and other sensitive devices are vulnerable to electrical distortion on the line.

The KDR line reactor provides a cost-effective solution to this issue.

 

 

 

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 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.

Voltage Before KDR Voltage After KDR
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 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.

 

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. Read the Impact of Additional AC Line Reactance technical paper for more details.

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