Draw a single-line diagram for a main transformer substation with 3 connected lines of 132 kV, two connected lines of 66 kV with power transmission via 2 transformers between 132 kV and 66 kV. From 66kV, it must be transformed down to an indoor system of 22kV with 10 cables going out. Draw a one-line diagram where you get the switches/fuses, measuring transformers, transformers, busbars, lightning arrester etc.

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