Overview Reviews Product Description GEC Durham Industries 1074 DF Voltage Transformer 300A 25:1 Ratio. Product Videos Custom Field Ratio 2.5:1 Product Reviews Write a Review Write a Review × GEC Durham Industries GEC Durham Industries 1074 DF Voltage Transformer 300A 2.5:1 Ratio Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *