FIELD: electricity.
SUBSTANCE: three-phase transformer filter comprises two three-phase transformers with delta-connected primary windings of the first transformer and wye-connected primary windings of the second transformer. The main secondary windings of each phase are interconnected in-series, at that the first outermost outputs of each phase are interconnected into zero point while the second outermost outputs are the leads for connection of single-phase and three-phase loads. Transformer ratios of the transformers are selected so that voltage at secondary windings of both transformers is the same.
EFFECT: suppression of high harmonics at non-linear behaviour of load.
1 dwg
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