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Insulation of HVDC transformers should be ___________

Insulation of HVDC transformers should be ___________ Correct Answer dry always

Because of the effect of moisture on the resistivity of insulation material, it is necessary to obtain and maintain a high level of dryness in the insulation of HVDC transformers. This is equally important in service as it is in the factory at the time of testing.

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2. hysteresis loss occurs in the transformers.
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Select the correct answer:
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