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Transformer Engineering, 2nd Edition by S.A. Khaparde, S.V. Kulkarni

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8

Insulation Design

Insulation design is one of the most important aspects of transformer engineering, particularly in high voltage transformers. Sound design practices, use of appropriate insulating materials, controlled manufacturing processes and good housekeeping ensure quality and reliability of transformers. Comprehensive verification of dimensioning rules is essential for enhancing reliability as well as for material cost optimization.

Due to the steady increase in transmission system voltages over the years, the voltage ratings of power transformers have increased and hence insulation content in them contributes significantly to their cost. Also, insulation space influences the cost of active parts (i.e., the core and windings) as well ...

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