Product Description

These Transformers are used to supply variable speed drives (VSD) for motor control. A VSD typically injests a whole spectrum of harmonics into the supply lines, and the transformers design needs to accommodate these harmonics. A convertor transformer is typically rated at **0% capacity, when a Distribution transformer is typically rated at *0% capacity. VSD drives are based on power electronic and usually require a neutral line, hence the most common vector group is DYn*1, i.e. a Delta Primary with a star Secondary with the neutral point brought out.

FURNACE TRANSFORMERS

The smeltering Industry uses AC & DC processes depending on the Arc Furnace application. DC Electric Arc Furnace (EAF) Transformers are similar in design to rectifier transformers, but have many more taps and on-load tap-changers. AC (EAF) transformers are subjected repeat short circuit conditions that require a more conservative design. They too have many taps and on-load tap changers. The AC (EAF) Transformers are generally manufactured as single phase units which allow the furnace design and process to be optimised.