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a) With single-phase transformers rated at 88/22kV, 10MVA. What vector group connection would you use to form a 3-phase unit to provide a 22kV system of an 88kV network with the secondary voltage lagging by 300?
b) Why must a ground connection exist for a zero-sequence current to flow?
c) What do you understand by the term "sweat" your assets in a business?
Need step by step solutions.