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Harmony-1E™
EPA Energy Star®
Compliant Harmonic Mitigating Isolation Transformers with low zero
sequence impedance secondary windings. Available with either 0°
or 30° phase shift between primary and secondary windings.
Configuration of the secondary windings cancels the fluxes generated
by the triplen harmonics in the load current thereby minimizing
triplen harmonic voltage distortion. Choice of phase shift permits
canceling of 5th and 7th current harmonics against those of other
loads fed from the same primary supply.
Harmony-2™,
Harmony-3™ and Harmony-4™
Multiple output
phase shifting transformers with extremely low zero sequence impedance
(patented). Available in both isolation or autotransformer configurations.
All models have
secondary windings which cancel the triplen harmonic fluxes to minimize
triplen harmonic voltage distortion. 5th, 7th and other higher order
harmonics are canceled as well to further reduce heating, voltage distortion
and upstream harmonic currents.
Harmonics treated by the secondary windings are as follows:
Harmonic
No. |
Product
|
3rd,
5th, 7th, 9th, 15th, 17th |
Harmony-2™*
|
3rd,
5th, 7th, 9th, 11th, 13th |
Harmony-3™
|
3rd,
5th, 7th, 9th, 11th, 13th, 15th, 17th |
Harmony-4™ |
* pairs of Harmony-2™s can be configured to treat 11th & 13th
on the primary bus.
The impedance
of standard or K-factor transformers will often introduce anywhere from
5-15% voltage distortion when servicing non-linear loads. Multiple output
Harmony™ transformers will typically add only 1-3% voltage distortion
when servicing similar non-linear loads.
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