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What are dust filters?

Dust filters are placed over ventilation openings to mitigate dust accumulation within the transformer’s enclosure. Filters are typically made to be removable and washable. Care must be taken for regular maintenance since accumulating dust will limit airflow and reduce air cooling. For this reason, dust filters are typically avoided through using non-ventilated designs or moving the transformer’s location. Because of reduced airflow, transformers cannot be retrofitted with dust filters without derating or using fan forced venting.

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