UNE-EN IEC 60076-24:2021

This IEC standard applies to medium power transformers from 25 kVA up to 3150 kVA withhighest voltage for equipment up to 36 kV or low voltage networks with highest voltage forequipment of 1,1 kV equipped with voltage regulating devices.Voltage Regulating Distribution Transformers are transformers equipped with components tocontrol primary or secondary voltage for on load voltage regulation purposes.The main objective of the installation of a VRDT is to regulate the LV network voltage level(i.e.400 V), to avoid violation of the limits defined by relevant standards or regulations. TheVRDT has to operate properly as a step down and step up transformer.Transformers covered by this standard comply with the relevant requirements prescribed inthe IEC 60076 standards and for Europe EN 50160 and EN 50588-1 unless otherwise statedin this standard.