Engineering_Is_Fun
Member
- Location
- Chicago
- Occupation
- Electrical Engineer
My issue is that I am getting Single phase line to ground fault values higher than the 3 phase fault values in an SKM short circuit study. I am using the INFINITE BUS option on the utility source and the X/R ratio defaults to 9999. This seems too high and I think thats the issue. The main Switchboard has a 3ph fault of 38,000 amps and a SLG fault of 40,000 amps.
1. Why is my SLG fault higher than my 3ph fault?
2. What value would you assume for the X/R of an infinite bus?
1. Why is my SLG fault higher than my 3ph fault?
2. What value would you assume for the X/R of an infinite bus?