Dry-Type Transformers vs. Oil-Immersed Transformers: Key Differences & Selection Guide | Shandong Weichite Power
Introduction:
Choosing between dry-type transformers and oil-immersed transformers is critical for project safety, cost, and efficiency. As a leading transformer manufacturer in China , Shandong Weichite Power Technology clarifies the core distinctions to help you optimize your power infrastructure.
1. Applications & Installation Sites
Dry-Type Transformers: Ideal for indoor installations in high-risk areas (basements, rooftops, high-rises) and densely populated zones due to their flame-retardant properties. Widely used in commercial buildings, hospitals, and compact substations
Oil-Immersed Transformers: Suited for outdoor substations with dedicated spaces (oil containment pits required). Shandong Weichite’s units excel in temporary power supply (construction sites) and large-scale industrial plants.
2. Capacity & Voltage Ratings
Dry-Type Transformers: Typically for distribution networks ≤1600kVA and ≤**10kV (custom 35kV models available). Models include SC epoxy resin-cast, SCR solid-insulation, and SG open-type.
Oil-Immersed Transformers: Dominate high-capacity and UHV applications (up to 1000kV). Shandong Weichite delivers solutions from small distribution transformers to grid-scale power transformers.
3. Insulation & Cooling Systems
Dry-Type: Use resin insulation (epoxy/Solidcast). Cooling: Natural air (AN) or forced-air (AF)for larger units. AF fans are essential in humid/tropical climates.
Oil-Immersed:Rely on insulating oil for insulation and heat dissipation. Oil circulation transfers heat to radiators, ensuring reliability in harsh environments.
4. Design & Safety Features
Dry-Type:Visible core/windings with silicone rubber bushings . Zero fire risk – no flammable fluids.
Oil-Immersed:Enclosed tanks with porcelain bushings. Requires oil containment pits for leak prevention.
5. Load Capacity & Cost Efficiency
Oil-Immersed Transformers offer superior overload capability.
Dry-Type Transformers operate optimally at rated capacity
Oil-immersed units deliver lower upfront costs for equivalent capacity.
6. Space Optimization
Space-constrained sites? Choose Shandong Weichite’s compact dry-type transformers.
Ample outdoor space? Oil-immersed transformers provide cost-effective high-power solutions.
Why Choose Shandong Weichite Power Technology?
As a premier transformer supplier in China, we engineer reliability:
Dry-Type Transformers: Optimized for fire safety (SC/SG/SCR models).
Oil-Immersed Transformers:Built for high-efficiency power transmission and harsh environments.
Partner with Shandong Weichite for tailored solutions! Contact us for transformer selection support, quotes, and technical consultation.