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zref:fault-current [2024/09/20 15:45] – created Alan Sheazref:fault-current [2024/09/20 17:04] (current) – [Utility Transformers] Alan Shea
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 =====Utility Transformers==== =====Utility Transformers====
  
-For utility transformers, a worst-case estimate of available short-circuit current in a three-phase fault can be determined by dividing the transformer ampere rating by the impedance of the transformer.((https://www.jcalc.net/transformer-short-circuit-fault-current-calculator)) This assumes an infinite utility bus with unlimited current; as this is rarely if ever the case, actual fault current will be limited by available utility bus current. +For utility transformers, a worst-case estimate of available short-circuit current in a three-phase fault can be determined by dividing the transformer ampere rating by the impedance of the transformer.((https://www.jcalc.net/transformer-short-circuit-fault-current-calculator)) This assumes an infinite utility bus with unlimited current; as this is rarely if ever the case, actual fault current will be limited by available utility bus current.((https://tools.se.app/faultcalc/FaultCalc.html)) 
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zref/fault-current.1726847129.txt.gz · Last modified: by Alan Shea