Series Description:SolaHD K-Factor transformers are designed to reduce the heating effects of harmonic currents created by loads like those shown in Chart A. The K-Factor rating is an index of the transformerÂ’s ability to withstand harmonic content while operating within the temperature limits of its insulating system. our K-Factor transformers have UL ratings of K-4, K-13, and K-20.
The SolaHD K-Factor design is a specialized transformer that offers these benefits: Conductors capable of carrying the harmonic currents of non-linear loads without exceeding the temperature rating of the insulation system. A transformer design that takes into account the increase in naturally occurring “stray” losses caused by non-linear loads. These losses cause standard transformers to dramatically overheat and substantially shorten design life. A core and coil design that manages the DC flux caused by triplen harmonics. As these harmonics increase, they cause additional current to circulate in the delta winding. This produces a DC flux in the core which leads to core saturation, voltage instability and overheating.
Energy Efficient Compliant to DOE 2016 1
Conductors to carry harmonics of a K-rated load without exceeding insulation temperature ratings
UL 1561 Listed up to K-20 rated protection
Rated temperature rise of 150°C, 220°C insulation
Shielded for quality power
Basic design takes “stray losses” into account and functions within safe operating temperatures
Core and coil design engineered to manage the zero sequence flux caused by triplen harmonics
Provides 100% rated current without overheating the windings or saturating the core
Meets transit test requirements for ISTA (International Safe Transit Association) – Test Procedure 1E for packaged-product
Quiet operation with sound levels 3-6 dB below the NEMA ST-20 requirements
