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Dec 18,2024 | nretec
A dry-type transformer is characterized by its core and windings not being immersed in insulating oil, instead using epoxy resin as the base insulation material. They offer high degrees of safety, compatibility, and low maintenance requirements.
Oil-immersed transformers use transformer oil as both an insulator and coolant, providing excellent insulation and heat dissipation. The core and windings are completely immersed in oil.
Dry-type transformers are generally safer as they don't contain flammable oil. Oil-immersed transformers require specific safety precautions due to potential fire hazards from oil leaks.
Yes, oil-immersed transformers typically last 30-40 years compared to 20-30 years for dry-type transformers, given proper maintenance.
Dry-type transformers require derating at high altitudes due to reduced air density affecting cooling efficiency. Professional consultation is recommended for installations above 1000 meters.
The choice between dry-type and oil-immersed transformers depends on specific application requirements, environment, safety needs, and maintenance capabilities. Dry-type transformers are preferred for indoor and densely populated areas, while oil-immersed transformers are better suited for outdoor, high-capacity applications. Proper installation and regular maintenance are crucial for optimal performance regardless of the type chosen.
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