Can someone please help me to answer the following question. A dry-type general-purpose power transformer isobserved to be operating above its rated tempera-ture. What are some possible causes?

Answered: A dry-type general-purpose power…

4th Edition

ISBN:9781305494817

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter12: Transformer Maintenance

Section: Chapter Questions

Problem 14RQ: What amount of water in transformer oil is considered acceptable for units operating at less than...

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Can someone please help me to answer the following question.

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Step 1

There are several possible causes for a dry-type general-purpose power transformer operating above its rated temperature:

Overloading: If the transformer is being used to supply more current than it is rated for, this can cause the temperature to rise above its rated temperature.
Ambient temperature: The surrounding air temperature can play a role in the temperature of the transformer. High ambient temperatures can cause the transformer to heat up faster than it can dissipate heat.
Insulation degradation: Over time, the insulation in the transformer may degrade, causing it to operate at a higher temperature than it should.