Electrical Power Formula
$$ S = \sqrt{3} V_L I_L $$
$$ P = S \cos\phi $$
$$ Q = S \sin\phi $$
$$ \text{Energy} = \frac{P}{1000} \text{ kWh / Units} $$
Mechanical Power Formula
$$ P_{out} = P \times \eta $$
$$ \text{HP} = \frac{P_{out}}{746} $$
Star / Delta Conversion
$$ V_{ph} = \frac{V_L}{\sqrt{3}}, \quad I_{ph} = I_L \quad (\text{Star}) $$
$$ V_{ph} = V_L, \quad I_{ph} = \frac{I_L}{\sqrt{3}} \quad (\text{Delta}) $$