Maybe you guys can help me

[DSaulnier]

My name is Dan and I am new to this site. However, my first question is not actually PLC related, instead it is related to an arc flash study I am conducting. I already have ran calculations on all of the fused panels I am supposed to, however the panels with circuit breakers in them confuse me. The trip curves for the breakers contain a "Trip Curve" and an "Interrupting Curve" which of these am I supposed to use in accordance with the trip curve calculations? (Predicted 3phase arcing current) Any help you guys could provide would be MUCH appreciated, Thanks!

Dan

 

[RDS]

According to the course book I used when attending a 3 day NFPA 70E training class: "The rating that defines the capacity of the protective device to maintain its integrity when reacting to fault currents is termed its interrupting rating". From this I would use the Interupting Curve in my calculations.

 

[DSaulnier]

Thank YOU!!!! very much