Star-Delta Transformer Connection Overview - IDC …

Electric power Transformer nameplate (50 MVA Substation Power Transformer with Load Tap Changer)Figure 1 - Transformer Connection - star -DeltajiguparmarStar- delta Transformer Connection OverviewStar- delta Connection OverviewIn this type of Transformer Connection , then primary is connected in star fashion while the secondary is connectedin delta fashion as shown in the Figure 1 voltages on primary and secondary sides can berepresented on the phasor diagram as shown in theFigure 2 points1. As Primary in star connected2. Line voltage on Primary side = 3 X Phase voltageon Primary side. So3. Phase voltage on Primary side = Line voltage onPrimary side / 34. Now Transformation Ration (K) = Secondary PhaseVoltage / Primary Phase Voltage5. Secondary Phase voltage = K X Primary PhaseFigure 3 - Y-D Grounding transformerFigure 2 - phasor diagram with voltages on primary and secondary As Secondary in delta connected:7. Line voltage on Secondary side = Phasevoltage on Secondary Secondary Phase voltage = K X PrimaryPhase voltage .

Figure 3 - Y-D Grounding transformer Figure 2 - Phasor diagram with voltages on primary and secondary sides Voltage. 6. As Secondary in delta connected:

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  Connection, Overview, Star, Voltage, Delta, Transformers, Star delta transformer connection overview, Phasor

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