Single Phase & Three Phase General Purpose
Single phase transformers are normally used to step-down single phase power at 600V, 480V or 240V to 240V or 208V. They are available with encapsulated and ventilated construction. They can be used in indoor or outdoor applications. They are also available with special primary and secondary voltage ratings for use in overseas applications. Three phase transformers are normally used to step-down three phase power at 600V, 480V, 380V, 230V, to 240V or 120V. They are available as encapsulated, non-ventilated and ventilated enclosures. They can be used in indoor or outdoor applications. We also have a product line of three phase dual purpose autotransformers. Siemens also offers transformer with K-Factor ratings. K-Factor is a ratio between the additional losses due to harmonics and the eddy losses at 60Hz. It is used to specify transformers for non-linear loads. Note that K-Factor transformers do not eliminate harmonic distortion; they withstand the non-linear load condition without overheating. All designs are UL K-Factor Listed per UL 1561 designed to IEEE C57.110 requirements. See website Selection and Application guide for more info.