PEC Harmonic Filters solve the problem of harmonic distortion on six pulse rectifiers and battery chargers.  PEC Harmonic filters will meet the guaranteed maximum levels of THID (total harmonic current distortion) all the way from no load to full load.  PEC Harmonic Filters also meet the most stringent IEEE 519 requirements (5% THID) of removing harmonic current distortion on virtually any kind of six pulse rectifier.  Additionally, PEC Harmonic filters will not cause power system resonance nor attract harmonics from other non-linear loads.  PEC Harmonic filters allow users to achieve attenuation of harmonics to levels below that previously attainable only by using 12-pulse or 18-pulse rectification methods.
Harmonics are a problem
Harmonic distortion has become an increasing concern for facility managers, users of automation equipment and specifying engineers alike.  Harmonics not only waste energy, but they reduce equipment life, electrical system reliability, system efficiency and equipment productivity.
 
Reasons to use PEC Harmonic Filters
Why are Harmonic Filters Necessary?
 
They Save Energy!
By nearly eliminating the wasted energy associated with harmonics, Harmonic Filters reduce the trms KVA demanded from a power source.
 
They Increase Reliability
Harmonic Filters reduce the burden on electrical equipment by reducing TRUE RMS (trms) current, peak current and harmonic frequency distortion. The series impedance included in the Harmonic filter also absorbs transient over voltages just like a line reactor, to prevent over voltage trips and rectifier damage. Increased system reliability means higher productivity.
 
They Increase Equipment Life
Harmonic Filters reduce the trms current that flows through equipment feeding non-linear loads. This reduces the amount of heat generated by upstream equipment (such as transformers, disconnects, fuses, circuit breakers and conductors), thus extending their life expectancy.
 
They Reduce System Harmonics
Harmonic Filters can reduce adjustable speed drive system harmonics to negligible levels.
 
They Reduce Current Waveform Distortion
Harmonic Filters improve the input current waveforms of non-linear loads to nearly sinusoidal. This results in lower peak current and trms current demands while achieving a cleaner power supply.
 
They Meet IEEE-519
Harmonic Filters allow you to meet the voltage and current distortion limits of IEEE-519, EN61000, AS2279 and G5/4.
 
 
I   /I
TDD (total demand distortion)
<20
5%
20<50
8%
50<100
12%
100<1000
15%
>1000
20%
IEEE-519 Current Distortion Limits
SC
L
where I    = short circuit current
I  = load current
 
SC
L
IEEE-519 Voltage Distortion Limits
Special applications (hospitals, airports) 3%
General systems applications 5%
Dedicated systems (100% converter load) 10%
 
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To view a Power Point Presentation about PEC's Harmonic Filters (approx 4MB), click HERE and choose "Open" when prompted, or right-click and "Save Target As" to download and view at a later time.