




#130101  02/09/06 08:07 PM
Re: Calculations

Member
Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA

OK  here's my initial cut at this. Start with the 3Ã˜ component  take 240,000 VA (80,000 VA per phase) divided by 240 * SqRt of 3, which comes out to around 578 amps.
Next I'd ignore the Ã˜A load as it just counteracts the Ã˜C load. The Ã˜C load is 41,000  divide that by 120V for another 342 amps (on the C leg).
All in all, 578 + 342 = 920 Amps < highest leg (which is Ã˜C).
Taking 920 amps X 1.25 = 1,150 amps, I'd vote for a 1,200 amp OCP.
Tomorrow at work I'll plug the raw data into a panel schedule and see what it says.
Radar
[This message has been edited by Radar (edited 02092006).]
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#130105  02/10/06 05:14 AM
Re: Calculations

Member
Registered: 12/12/04
Posts: 1091
Loc: nowhere usa


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