Does anyone know how I can turn transformers into a simple ohm value as done with wires? I'm looking to make a series of tables electricians can use onsite.
One can, for example: for a single L-G fault choose 0.016 ohms for the POCO transformer, 0.002 ohms for the service, 0.035 ohms for the feeder (phase + EGC) and 0.25 ohms for the branch circuit (phase + EGC) to its furthest point.
Simple ohms law would take you to the required destination.
This can be used to find max fault current and to determine breaker disconnection times.
One can, for example: for a single L-G fault choose 0.016 ohms for the POCO transformer, 0.002 ohms for the service, 0.035 ohms for the feeder (phase + EGC) and 0.25 ohms for the branch circuit (phase + EGC) to its furthest point.
Simple ohms law would take you to the required destination.
This can be used to find max fault current and to determine breaker disconnection times.