@electromech.hub: A transformer vector group tells us 2 main things: 1, How the HV and LV windings are connected — Delta, Star, Zigzag, etc. 2, The phase displacement between HV and LV voltages. #The notation follows IEC 60076-1. The HV connection is written first, followed by the LV connection and then the clock number for phase displacement. Meaning of the letters: #Symbol #Meaning D HV Delta (Δ) Y HV Star (Y) Z HV Zigzag d LV Delta (Δ) y -------- LV Star (Y) z -------- LV Zigzag N --------- HV neutral brought out n --------- LV neutral brought out Meaning of the number * The final number is the clock position and represents phase displacement in multiples of 30°. #Number #Angle 0 ————— 0° 1 ————— 30° 2 ————— 60° 3 ————— 90° 5 ————— 150° 6 ————— 180° 7 ————— 210° 11 ————— 330° (= −30°) * Therefore Dyn11 means: D → HV side is Delta connected y → LV side is Star connected n → LV neutral is brought out 11 → LV voltage phasor is at 11 o'clock, corresponding to 330° or equivalently 30° lead relative to the HV * For Dyn11, it is safest to say “the LV winding is at clock position 11 (330°)”; depending on the reference/convention used, this is described as the LV leading the HV by 30° or lagging by 330°. IEC examples explicitly describe Dyn11 as LV lagging HV by 330°. � upload.digoodcms.com +1

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Tuesday 01 September 2026 15:51:29 GMT