Radian TRC

Introduction We are specialist power transformer manufacturers. Our core strengths are in the design and manufacture of rectifier transformers furnace transformers and convertor transformers. Product Overview We focus in the range of 50 kVA to 20 MVA, and will consider ratings outside of that range. Typically our customers require HV voltages in the 3.3 kV to 33 kV range, though we can offer higher values. Mineral extraction from ores is generally performed by electrolytic reduction (e.g. base metals, copper) or smelting (ferro-chrome). Our transformers are a mission critical part of the extraction process. Rectifier Transformers The electrolytic process requires large regulated DC currents. These currents are supplied and regulated by high power rectifiers, which are in turn supplied by bespoke rectifier transformers. The transformers are rated for 100% duty in harsh environments. Furnace Transformers The smelting industry uses an AC or DC process 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 subject to repeated short circuit conditions, and require a far more conservative design approach. They typically have many taps and on-load tap-changers. AC EAF transformers are very often built as single phase units which allow the furnace design and process to be optimised. We have recently completed a complete rewind of two shell-type ACEAF transformers. They are both back in service and performing flawlessly. Convertor Transformers Convertor transformers are optimised to supply variable speed drives (VSD) for motor control. A VSD typically injects a whole spectrum of harmonics into the supply lines, and the transformer design needs to accommodate these harmonics. A convertor transformer is typically rated at 100% capacity where a distribution transformer is typically rated at 80% capacity. VSD drives are based