Quote Originally Posted by surgeArrester View Post
I think it should be different. ASPEN doesn't use standards on fault calculations unlike ETAP. ETAP modifies the impedance of rotating machines as per standard. I think it is best to know this as an electrical engineer. But there are instances they are same, it really check on ETAP's inputs - I have done it before.

Example:
In aspen, you model generators as generators but its equivalent in ETAP is the Utility. If you use generator, it will modify the impedance to be used in fault calculations - depending whether (half cycle,.. etc) fault.
Thank you for your feedback. This day download the recloser events which are connected generators and single-phase faults that are registered are very similar to those obtained in ETAP. I read the IEC 60909 and support of ETAP (very full) and I understood what you mention. ETAP is superior to all the software I used.