Re: DC3300 - suggestions, upgrades, etc??
Posted: Thu Nov 10, 2016 8:21 pm
Uh Oh! Your turn JPG.BuckeyeDennis wrote:For 3-phase power,JPG wrote:1.73?
P = SQRT(3) × V_line × i_line × cos(theta)
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DC3300 - suggestions, upgrades, etc??
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Re: DC3300 - suggestions, upgrades, etc??
Posted: Thu Nov 10, 2016 9:26 pm
Θ = V/I phase shift? Would that not vary between motors?BuckeyeDennis wrote:For 3-phase power,JPG wrote:1.73?
P = SQRT(3) × V_line × i_line × cos(theta)
Re: DC3300 - suggestions, upgrades, etc??
Posted: Thu Nov 10, 2016 10:41 pm
Correct. The cos(theta) term is called "power factor". It varys, but generally not a whole lot for induction motors of a similar size. The NEC, for example, specifies conductor sizing based on motor continuous-power rating alone. And we're just looking for a rough-but-honest way to compare woodworking-machine motors.
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