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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Mains electrical Q: transformer sizing?
On Thu, 17 Jan 2008 22:27:35 GMT, James T.
wrote: Because this is driving a purely resistive load, this doesn't help bring the parameters within the transformer's rating, does it? No, a purely resistive load is best case. But since the transformer is (presumably) designed with a worst-case PF (or at least some PF value greater than 1), can't it be re-rated (what's the opposite of "derated"?) if used with a strictly resistive load? In other words, a transformer rated at 10KVA for a load with PF = x, should be able to handle a greater KVA if driving a PF = 1 load. Shouldn't it? volts * amps = volt-amps regardless of power factor. |
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