[RE-wrenches] Sizing 3 phase OCPD - main

Hi wrenches,  I have a question about sizing the main OCP breaker for a panel combining the output of several true three-phase output inverters. To be precise - 10 of the  Refusol 20kW, which connect to  480V/277 Y with a max output of 24.1 amps, each inverter has a 3 pole breaker, line a, b, c

Re: [RE-wrenches] Sizing 3 phase OCPD - main

Subject: [RE-wrenches] Sizing 3 phase OCPD - main Hi wrenches, I have a question about sizing the main OCP breaker for a panel combining the output of several true three-phase output inverters. To be precise - 10 of the Refusol 20kW, which connect to 480V/277 Y with a max output of 24.1 amps, each

Re: [RE-wrenches] Sizing 3 phase OCPD - main

16, 2011 11:43 AM Subject: Re: [RE-wrenches] Sizing 3 phase OCPD - main Rebekah,   If you knew only the power and voltage, then you would use the root of 3 to determine the amps. But since you know the amps, you don't need to use the root.   The second equation would be the correct one