Community greetings, I ask from my ignorance, I need to calculate the power factor activity a three-phase system and my question is if I can calculate it based on the maximum ampere consumption per phase, can it be done? My question comes because I need to select a suitable circuit breaker, to replace a board generated, the old one that is 125 amp. Maximum, of the baw brand, where it has remained small or fair, and I have peak consumption of 120 amp and the same jumps. I would like to be guided to determine the instrument purchase.

Hi. Actually if you need a breaker, clarify if it should be manual or automatic. If you place for example a disconnector under load with NH fuses you have 160, 250, 400 and 600 amps within the conventional ones. You can limit the protection current with the fuse current by placing an oversized switch. Regards