Three identical Y-connected resistors of 1.020 per unit form a load bank that is supplied from...

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Three identical Y-connected resistors of 1.020 per unit form a load bank that is supplied from the low-voltage Y-ungrounded side of a Y-A transformer. The zero, positive, and negative-sequence voltages on the low voltage Y-side of the transformer are: Vao = 0 per unit; Val = 1.020° per unit; Vaz = 0.52250° per unit. Account for the transformer phase shift, (a) Draw the zero, positive, and negative-sequence networks. (b) Determine the line currents on the low and high-voltage sides of the transformer. (c) Determine the line-to-line voltages on the high-voltage side of the transformer. Three identical Y-connected resistors of 1.020 per unit form a load bank that is supplied from the low-voltage Y-ungrounded side of a Y-A transformer. The zero, positive, and negative-sequence voltages on the low voltage Y-side of the transformer are: Vao = 0 per unit; Val = 1.020° per unit; Vaz = 0.52250° per unit. Account for the transformer phase shift, (a) Draw the zero, positive, and negative-sequence networks. (b) Determine the line currents on the low and high-voltage sides of the transformer. (c) Determine the line-to-line voltages on the high-voltage side of the transformer.

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Solution a The zero positive and negative sequence networks are Zero sequence Vao ... View the full answer