Correction of VVFV that should be VFVV. VFVV is defined as Variable Flux Voltage Variation.
IEEE C57.12.10-2010/Cor 2-2013
$139.00
IEEE Standard Requirements for Liquid-Immersed Power Transformers — Corrigendum 2: Correction of A.3.2.13 Autotransformer LTC application considerations