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Power Quality Solution

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Power Quality Solution
Active Harmonic Filter

Ratings Available
AC Power
for Business-Critical Continuity™
30, 60, 100, 150, 300 A
Three phase
State-of-the-Art active filter, that dynamically cleans up Harmonics and improves Power Factor, for all types of electrical installations. It has dynamic control features and has no resonance effects, no reactive power circulation, no passive components.


Effect of Harmonics :
Overheating of Generator, motor, transformer.
Overvoltage conditions on supply system.
Increased transformer losses (need to over-size)
Nuisance tripping of circuit breakers
Improper operation of microprocessor-based equipment
Overheating and possible resonance with capacitors
Re-injection of harmonic currents into the utility network.
Neutral burnout.
Insulation breakdown.
Decreasing Distribution Capacity due to hot cables.
 
Harmonics are periodic, sinusoidal & integer multiples of fundamental frequency (50 or 60Hz), current or voltage components, present in nonsinusoidal waveform.
It distorts pure sinusoidal waveform and turns it to a non-sinusoidal waveform.
Harmonics can only be measured by electronic measurement devices
 
APFC Panel
 
We are engaged in offering our clients a wide range of Automatic Power Factor Correction Panel. We are offering Detuned APFC, Real Time Power Factor Corrector.
 
APFC Panel

Detuned APFC (5.67%, 7%, 14%)

We are engaged in offering a quality range of APFC Panels. These products are acknowledged for their attributes such as sturdy construction, trouble-free operations, reliability and durability. In electrical power networks, ranging from the industrial electricity network through to office buildings,system perturbation occur when operating electrical and electronic loads. We refer to network perturbation when the original “clean” sine wave of the voltage or current changes.

Network perturbation cause additional costs and should be limited. Janitza® offers various approaches to solutions which limit harmonic currents and therefore improve power quality. The solutions range from passive harmonic filters and de-tuned PFC systems through to state-of-the-art power electronics in active harmonic filters.

Investments in harmonic filters generally pay off within 6-24 months. This means that kWh losses are reduced, reactive power costs are decreased, the lifespan of electrical instruments is lengthened and production processes are stabilised.

Automatically regulated PFC systems in extractable module design for applications with rapid and high load changes. The modules are built into steel cabinets constructed in extractable module design in which the output can be expanded as required.

 
 
Real Time Power Factor Corrector (RTPFC)
 
APFC Panel

Dynamic PFC systems are particularly used in applications with rapid and high load changes. In such cases, conventional PFC systems are not fast enough to follow the load changes which means that these systems are either under compensated or overcompensated.
Electromechanical contactors are not suitable for these types offrequent switching cycles. If contactors or capacitor contactors are still used in such applications, the contactors are worn out very quickly and this can lead to significant safety risks for the whole system. Dynamic PFC systems avoid this problem with the help of semiconductors. Semiconductors gently connect thecapacitors to the network i.e. without network perturbations and capacitor stresses.

 
 
AF3 - Next Generation Active Filter
 
Liebert AF3 latest technology to eliminate harmonic injected into the mains supply by non linear loads, as well supplies inductive power demanded by the load, so as to correct input power factor to near unity.
 
AF3 - Next Generation Active Filter

Current harmonic elimination is achieved by sensing load current& extracting harmonic current signal. This and the reactive current signal, together are used to generate a reference for the controlled current source connected at the PCC(point of common connection) of source and load. This results in mains supplying only real power for the load and reactive & harmonics being sourced from the AF3.This is carried out dynamically,so that any change in the load pattern or its nature is immediately responded without any manual intervention.

In the following example first figure shows the recorded input current waveform of a six pulse thyristorised rectifier.

Bottom figure shows considerable improvement in the waveform due to AF3 connected in shunt.

One is with only harmonic correction and the other is with power factor & harmonic correction.