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DETUNED HARMONIC FILTER REACTORSDetuned Filter Reactor


Detuned Filter Reactors, are used in series with capacitor banks in power factor correction units. By using these types of detuned reactors it is possible toavoid following negative effects on system.


• Overcurrent during switching on the capacitor banks
• Overload of capacitor banks because of the harmonic resonance.
• Short lifetime on capacitors
• Overheating of the utility transmission cables.
• Overheating of the distribution transformer.
• Unintended triggering of the protective devices.
• Distortion of utility voltage waveform and problems on voltage sensitive devices
• Interferences on data transmission systems
• Unexplainable faults in electronic boards


Chosing the correct detuned filter reactor and capacitor value on detuned power factor correction systems is very important. To obtain optimum performance form a detuned power factor correction system following criteria must be controlled and met during the pairint of the reactors and capacitors.


CHOOSING CORRECT DETUNED FILTER REACTOR


• The resonance frequency must be chosen according to harmonic analysis of the system
• The voltage across the terminals of the capacitor will increase because of the inductive reaction of the rector. The rated voltage of the capacitors must be chosen according to the resonance frequency.
• In detuned power factor correction systems, presence of higher voltage rated capacitors and reactors causes a difference between rated capacitor power and obtained reactive power. The obtained power must be calculated in order to avoid low compensation.
• The reactors will genereate extensive heat dur to heavy harmonic load on them. The cabinets must be designed to disperse this heat.


VALUES TO BE SPECIFIED FOR CUSTOM DETUNED FILTER REACTORS


• Utility Voltage

• Resonance Frequency

• Information on the available capacitors