4. AC voltage adaptation: transformer
4.1 Transformers and chokes
Under single-phase catenary, the transformer lowers the voltage – 25 kV (50 or 60 Hz) or 15 kV (16.7 Hz) – to a level suitable for traction motor operation: from 1,500 to 2,000 V.
We won't go into its well-known principle
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AC voltage adaptation: transformer
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