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Power distribution transformers are crucial in electrical systems, providing stable power supply for industrial plants, commercial stores, and residential communities. In factory power systems, transformers are often used to achieve different voltage levels. Common transformer types in China include 110/35kV, 110/10(6)kV, 35/10(6)kV, 35/0.4kV, and 10(6)/0.4kV. Based on insulation methods, transformers are categorized into oil-immersed and dry-type. Before the 1990s, oil-immersed transformers dominated due to limited technology. However, dry-type transformers later emerged and gained popularity across industries.
Key Question: Should you choose oil-immersed or dry-type transformers? Let’s explore their features and applications.
Oil-Immersed Transformers:
Advantages: Easy maintenance, cost-effective, adaptable to indoor/outdoor environments. Modern manufacturing has largely resolved oil leakage issues.
Applications: Preferred for high-voltage, large-capacity industrial projects.
Dry-Type Transformers:
Advantages: Low maintenance, compact size, high insulation, fire-resistant, eco-friendly.
Applications: Ideal for civil buildings (residential areas, hospitals, schools, malls) and fire-sensitive environments.
Application Scenarios:
Oil-Immersed Transformers: Suitable for spacious industrial sites with harsh conditions (dust, humidity) due to affordability and durability.
Dry-Type Transformers: Optimal for safety-critical, space-constrained locations (hospitals, schools, theaters, offices) despite higher costs.
