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Question 4.

For special high-voltage transformers used in private receiving substations, such as 22.9 kV-to-low-voltage transformers, explain the concept and winding method of the increasingly adopted Hybrid Transformer. Also, compare its characteristics with those of conventional transformers and low-noise, high-efficiency transformers.

Question 11.

Explain the Y-Zig zag transformer connection.

Question 1.

Explain the winding method of the Hybrid Transformer with harmonic mitigation capability as a distribution transformer, 22.9 kV to low voltage. Also, compare the characteristics of the Hybrid Transformer and the K-factor transformer.