etap showing FCT not determined error on busbars and OCPD's

[@Ankita]

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 resolve this error. Attached is the screenshot for the exact errors.

 

[NickParker]

Hello,

You have to make the relay settings and (or) provide the correct fault clearing time in ETAP.

 

[@Ankita]

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.

 

[NickParker]

You have to enter the fault clearing time for the thermal magnetic breakers as well

 

[@Ankita]

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.