Medium Voltage Power Transformers

Type PY harmonic mitigating Power TransFilters™ exceed all existing and pending energy efficiency requirements under nonlinear loading. Type PY transformers’ ultra-low Excitation (no-load) Losses provide high efficiency during periods of light-loading (<15% FL). This benefit is achieved by using higher quality, grain-oriented silicon core steel and full and step-lap miter-cut cores with reduced laminations per group. Unlike Excitation Losses, which are constant from no-load to full-load, Impedance (load) Losses become significant at approximately 15% FL. Excitation and Impedance Losses are approximately equal at 50% FL under linear loading. Type PY transformers exceed the efficiency requirements of DOE 2016 under linear loading. Optional e-RatedÒ units exceed these efficiency requirements under moderate nonlinear loading (≤K-9). Type PY transformers’ published efficiencies can be matched to anticipated or measured average loading above 50% FL, when required. Type PV Power TransFilter™ Medium Voltage, UL Listed Dry-Type & Cast Coil Transformers for High K-Factor, Phase-to-Neutral Connected Nonlinear Loads with an integrated Type TPM Transformer Performance Meter™