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Medium-voltage transformers
Envirotran critical load three-phase pad-mounted transformer
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  • 2017 NEC Requirement Guidelines for the Installation of Listed Less-Flammable Liquid-Filled Transformers
    These guidelines represent Eaton's understanding and interpretation of the National Electrical Code, UL Classification of Envirotemp FR3 Fluid and FM Global Property Loss Prevention Data Sheets 5-4 - Transformers, Approved Transformer Fluids Standard 6933, FM Approved Transformer Standard 3990 and IEEE standards in effect at the time of this publication. It does not necessarily represent the position of Eaton on the protection and installation of less-flammable transformers.
    (PDF 842 KB, 1/18/2019)
  • Overvoltage protection for pad-mounted transformers information
    This document discusses how understanding the different arrester types and duty cycles available can greatly reduce the risk of losing a transformer due to an overvoltage, while minimizing the cost of overvoltage protection.
    (PDF 72 KB, 9/1/2016)
  • Pad-mounted transformer fusing philosophies
    The fusing philosophies described in this document have been used for many years to create fuse selection and coordination tables for Eaton's Cooper Power series fuses used in pad-mounted transformer applications.
    (PDF 71 KB, 3/1/2015)
  • VFI transformer vs. switchgear information
    This technical document discusses how a transformer equipped with an integral vacuum fault interrupter (VFI) can be an alternative to a non-VFI transformer in combination with stand-alone switchgear.
    (PDF 57 KB, 3/1/2015)

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