Dry-type Transformer

Dual Voltage Dry Transformer 11kV/6.6kV Switchable Critical Safety: IP65 + flame-retardant resin,...
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      Dry-Type Transformers vs. Oil-Immersed Transformers: Key Differences & Selection Guide | Shandong Weichite Power



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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.  

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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 


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   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.  

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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.  




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