so calculating FC on an infinite bus is easy but how do you calculate it by hand for a finite bus?(adsbygoogle = window.adsbygoogle || []).push({});

here is the concept i am having an issue understanding:

let say i have a transformer that is 225KVA with 5%z and 3 phase 480 to 208.

with infinite bus i have 12491A available on the secondary of this transformer IF 12291A is flowing on the secondary then based on the voltage ratio and OHMs law 5412.8 A is flowing on the primary.

If this is true then what does it matter if i have infinite amps available on the primary or i have 5412.9 amps available 12491A should still flow in my mind.

I have run this in SKM and i see that it does matter but i just dont understand why.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Fault current on finite bus

Loading...

Similar Threads - Fault current finite | Date |
---|---|

Help with magnetic force from fault current on overhead wire | Nov 29, 2016 |

Fault current time 1, 3 or 5 sec | Nov 15, 2014 |

Three winding transformer fault current study | Oct 3, 2014 |

Can a second earthing conductor drive the fault current back? | Apr 26, 2014 |

Maximum Short Circuit Current (Fault-Current) before breakdown of cond | Mar 17, 2014 |

**Physics Forums - The Fusion of Science and Community**