9. Full Rated Load The maximum continuous load (in kVA or MVA) the transformer can carry at its rated voltage and frequency without exceeding temperature limits. • Determined by: o Nameplate Rating specified by manufacturer o Cooling Class – ONAN (Oil-Air) for transformers using mineral oil KNAN (Oil-Air) for transformers utilizing FR3 oil FA (Forced Air – not typical in Distribution Transformers) FOA (Forced Oil-Air – not typical in Distribution Transformers) o Temperature Limits based on insulation class (e.g., 65°C rise for mineral oil- filled units) • Includes Losses, accounting for core losses (no-load) and winding losses (load losses)
Voltage Regulation to maintain rated secondary voltage under full load conditions Reductions: o Higher ambient temperatures may reduce allowable load
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