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Can dry-type transformers be used outdoors

May 12, 2023

When we use dry-type transformers in our production and life, they are used indoors, in fact, dry-type transformers are also installed outdoors, but there are some conditions, and some even have to be maintained and maintained to avoid this or that problem. Dry-type transformers can be placed outdoors, and we will mainly introduce you to the specific details:
Dry-type transformers should be placed outside and in the open air:
1. The difference between temperature rise and heat dissipation, especially for dry-type transformers with natural heat dissipation, make it better outdoors.
2. The insulation requirements will be different, considering the poor outdoor insulation environment (pollution level), the external insulation performance of the dry-type transformer will be required.
3. The protection level will be different, considering the difference in outdoor safety performance, the dry-type transformer protection level will be required to be slightly higher.
Note: Outdoor dry-type transformers (high-power equipment) will inevitably cause lightning. Be prepared for lightning protection. In the past, lightning damage distribution was simply believed to be caused by lightning waves entering the high-voltage winding, but in fact, this understanding has a degree of one-sidedness. Theoretical analysis and practical experiments show that the main cause of distribution lightning damage accidents is caused by the overvoltage of "forward and reverse conversion" when the distribution system is damaged by lightning, and the reverse conversion overvoltage damage accident is particularly serious. The development process of forward and reverse conversion overvoltage is analyzed, and the lightning protection of distribution is discussed.

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