Power Quality Improvement, using Harmonic Sweeper™ transformer. In the past few years the increase of non-linear loads in low voltage distribution systems generated a specific need for cost-effective harmonic cleaning devices. In theory other than expensive active or passive fîltering, phase shifting transformers can be used. The increased employment of variable speed drives, PC-computers, and other non-linear loads increased the content of 3rd, 5th, 7th, and 9th harmonic current in the distribution Systems.
The Harmonic Sweeper™ gives you the opportunity to treat the Third harmonic at a low impédance and with low voltage distortion, because the third harmonic (and triplens) are cancelled in the magnetic circuit of the secondary winding.
This harmonic cancellation transformer may be used with loads with a high content of third harmonic like line-neutral rectifiers. The transformer treats ine 5* and 7th harmonic efficiently when used in parallel witb a 30 degrees phase shift, k factor transformer. It is recommended for such loads as 208 volt switch-mode power supplies with a high content of 3rd, 5th,7th, 9th and other harmonics or with other typical non-linear loads.
The Harmonic Sweeper™ is an effective solution for treating 5th and 7th harmonics in an old distribution System, with an existing standard 30 degrees phase shift transformer (Delta/wyc). Simply install the unit, split equally the non-linear load, and the content of harmonics will be effectively reduced.
Where to use Harmonic Sweeper™ (stand alone or in parallel with Marcus MT models)
In commercial, institutional and industrial buildings;
With UPS or special generator groups,
Industrial rectifier,
PWM drives for elevators,
UV filterïng lights,
electronic ballast lighting.
TM Technical benefits and performance of harmonic mitigating transformer
Cancellation of 5th and 7th harmonics paralleled with a 30 deg. phase shift transformer
- 3"1 harmonic cancellation in secondary with reduced voltage distortion;
- Low no Ioad losses due to WATT+ technology (wound cores); * Low impédance and good voltage régulation;
- 14% less supplementary losses because of the absence of 3rd harmonic in the primary winding;
- stiff neutral for unbalanced loads;
- CSA efficiency standard C802-94 and Energy Star Nema TP-! compilant;
- K factor harmonic mitigating transformer features (low core saturation, static shield, heavy coils);
- 100% copper windïngs; Available configurations: Manufacturing code: MTZ (followed by the suffix for voltage range from our catalogue); Power range: 15,30,45,75, 112.5, 225KVA; Standard K factor, and dual static shield construction; Standard température rise 150C<"li>
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Harmonic mitigating
Double harmonic mitigating