Hi all,
I may have put myself in a small bind. But would like some thoughts.
First off I do not know the AFC at this particular customer facility. But most of the customers we work with require 50-65kA suitable panels..
I have a panel using mostly all AB products. Pretty small control panel. But have realized the 1489 circuit breakers I'm using only have a 10kA rating. All my other branches are covered to at least 65kA except these two. I am using J-type 30a fuses in my main fused disconnect. No transformer feeding this panel so I cannot use peak let through from isolation transformer.
I do not think I can use peak let through of the class J main fuses either since the IP Isc and clearing time are all greater than the 10kA using the charts, as long as I'm reading them properly.
Will I have to change these breakers out with fuses to bring it up?
Sorry no PLC question here.
Thanks!
I may have put myself in a small bind. But would like some thoughts.
First off I do not know the AFC at this particular customer facility. But most of the customers we work with require 50-65kA suitable panels..
I have a panel using mostly all AB products. Pretty small control panel. But have realized the 1489 circuit breakers I'm using only have a 10kA rating. All my other branches are covered to at least 65kA except these two. I am using J-type 30a fuses in my main fused disconnect. No transformer feeding this panel so I cannot use peak let through from isolation transformer.
I do not think I can use peak let through of the class J main fuses either since the IP Isc and clearing time are all greater than the 10kA using the charts, as long as I'm reading them properly.
Will I have to change these breakers out with fuses to bring it up?
Sorry no PLC question here.
Thanks!