Standard icon


ANSI/IEEE C57.109-1985 - IEEE Guide for Transformer Through-Fault-Current Duration

Description: Recommendations believed essential for the application of overcurrent protective devices applied to limit the exposure time of transformers to short circuit current are set forth. Transformer coordination curves are presented for four categories of transformers. There is no intent to imply overload capability.
  • Status:Superseded STDHelp

Get This Standard

Buy Purchase a copy of this standardBuyExternal Link
Access with Subscription External Link Standards Online subscribers can access this standard in IEEE Xplore Digital Library. Access Learn More