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How can we calculate the Fault clearing time for the breakers or is there some reference from where we can get these values? Please confirm.

That relay settings will still be applicable only for the electronic trip breakers. But we're getting this error on the thermal magnetic fixed trip breakers as well.

We're designing one of client's SLD in etap but every time we run the Short circuit, all the busbars and OCPD's are not able to calculate the Fault clearing time and it's showing FCT Not Determined error. Is anyone else facing the same issue or aware about the appropriate settings that can help...