Potential Transformer Our Potential Transformers are designed to present negligible load to the supply being measured and have an accurate voltage ratio and phase relationship to enable accurate secondary connected metering, with following technical deatails: A- Indoor PT with Epoxy insulation up to 33KV Burden and accuracy class as per IS Standard. V F can range upto 1.9 for 8 Hrs. Single pole,Double pole or 3 phase PT B-Oil cooled PT up to 33KV Burden and accuracy as per IS standard V F can range upto 1.9 for 8 Hrs. Single or 3 phase