TTI-K – THREE PHASE K-FACTOR ISOLATION TRANSFOMERS FOR NON LINEAR LOADS from 10 to 500kVA with K4, K13, K20 factor

K-factor transformers are designed to manage the heating effect caused by harmonics and high neutral currents.

The K-factor index shows the ability of the transformer to withstand the harmonics operating within his thermal limits, through conductors of a proper size. The design of the K-factor transformers considers the “stray” losses caused by nonlinear loads and the DC component caused by triplen harmonics. The additional current which circulates in the delta winsing which may leads to a core saturation and voltage instability is taken into consideration and does not bring to a shorter life of the transformer

• K-factor rating: K-4, K-13, K-20

• Overload capacity 500% for 1/60″ – 200% for 30″

• Dielectric strength 4,2kVac min.

• Impedance voltage from 3% to 5%

• Taps on primary ± 2×2.5% FCAN, ±2×2.5% FCBN

• Input voltage range: ±6% on rated voltage

• Max regulation at full load up to 3%

• Audible noise < 60dB at 1mt.

• Enclosure type: IP23, metal, epoxy painted RAL7032

• Operating temperature: 0°C to 50°C

• Operating humidity: up to 90% relative (non condensing)

• Operating altitude: up to 1000mt above sea level