E Rated Potential Transformer Fuses Current Limiting Potential Transformer (PT) fuses are current limiting fuses with high interrupting ratings designed for the protection of potential transformers. CHARACTERISTICS Voltage Rating: 600VAC – 25,500 VAC Current Range: 1/2E – 10E Application Note: When applying fuses for the protection of transformers, the magnetizing current inrush must be considered. The characteristics of the inrush, which can be matched with a fuse’s time-current curve, should be available from the transformer manufacturer. B A E Size 3E 5E 7E 10E Max Interrupting Rating RMS (Asym) 62,500 62,500 62,500 62,500 1/2E 1E 2E 4.625 4.625 4.625 0.8125 0.8125 0.8125 40,000 40,000 40,000 1E 2E 3E 1E 2E 3E 7.375 7.375 7.375 9.5 9.5 9.5 1.625 1.625 1.625 1.625 1.625 1.625 37,500 37,500 37,500 50,000 50,000 50,000 LCE 1E-4 LCE 2E-4 1E 2E 5.5 5.5 0.8125 0.8125 50,000 50,000 LCQ .5E LCQ 1E LCQ 2E LCQ 3E LCQ 5E LCQ 10E 1/2E 1E 2E 3E 5E 1/2E 1E 2E 3E 5E 10E 7.375 7.375 7.375 7.375 7.375 9.5 9.5 9.5 9.5 9.5 9.5 1.625 1.625 1.625 1.625 1.625 1.625 1.625 1.625 1.625 1.625 1.625 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 37,500 1/2E 1E 2E 3E 9.5 9.5 9.5 9.5 1.625 1.625 1.625 1.625 50,000 50,000 50,000 50,000 2.4 Max. KV 500E-4PT-2.4 1E-4PT-2.4 2E-4PT-2.4 2.75 Max. KV 1E-6PT-2.75 2E-6PT-2.75 3E-6PT-2.75 1E-8PT-2.75 2E-8PT-2.75 3E-8PT-2.75 4.8 Max. KV 1E-5PT-4.8 2E-5PT-4.8 5.5 Max. KV 1/2E-6PT-5.5 1E-6PT-5.5 2E-6PT-5.5 3E-6PT-5.5 5E-6PT-5.5 1/2E-8PT-5.5 1E-8PT-5.5 2E-8PT-5.5 3E-8PT-5.5 5E-8PT-5.5 10E-8PT-5.5 8.25 Max. KV 1/2E-8PT-8.25 1E-8PT-8.25 2E-8PT-8.25 3E-8PT-8.25 15.5 Max. KV Catalog Number 3E-4PT-6 5E-4PT-6 7E-4PT-6 10E-4PT-6 Diameter Dim. B (inches) 0.8125 0.8125 0.8125 0.8125 1/2E-11PT-15.5 1E-11PT-15.5 2E-11PT-15.5 3E-11PT-15.5 3E-16PT-15.5 5E-16PT-15.5 LCT .5E LCT 1E LCT 2E LCT 3E 1/2E 1E 2E 3E 3E 5E 12.875 12.875 12.875 12.875 17.5 17.5 1.625 1.625 1.625 1.625 1.625 1.625 80,000 80,000 80,000 80,000 80,000 80,000 25.5 Max. KV 600 Volt PT Length Dim. A (inches) 4.625 4.625 4.625 4.625 Old Catalog Number 1/2E-16PT-25.5 1E-16PT-25.5 LCJ 1E-4 LCJ 2E-4 1/2E 1E 17.5 17.5 1.625 1.625 43,500 43,500 72 LCD 1E-4 LCD 2E-4