1000kva 3 Phase 11kv 440v Oil Immersed Transformer

Difference Between Oil immersed and Dry type transformer:

1. Cooling Medium

1000kva 3 phase 11kv 440v dry type transformers mainly use air natural convection or epoxy resin cast insulation for cooling and insulation purposes. However,1000kva 3 phase 11kv 440v oil immersed transformers use mineral insulating oil, which serves both as a cooling and insulating medium.

2. Heat Dissipation Efficiency

1000kva 3 phase 11kv 440v dry type transformers have relatively lower heat dissipation efficiency, which mainly rely on air circulation. Cooling fans are often required for larger capacity units. Fortunately,1000kva 3 phase 11kv 440v oil immersed transformers provide better thermal performance because insulating oil has a high heat capacity and can transfer heat efficiently through radiators.

3. Size and Weight

1000kva 3 phase 11kv 440v dry type transformers are more compact and lightweight since they do not require oil tanks or oil conservators. However,1000kva 3 phase 11kv 440v oil immersed transformers are generally larger and heavier due to the additional oil tank, conservator, and cooling structures.

4. Fire Safety

1000kva 3 phase dry type transformers offer higher fire safety because they do not contain flammable insulating liquids. Most of models use flame retardant epoxy resin materials, which makes them suitable for areas with strict fire protection requirements. 1000kva 3 phase 11kv 440v oil immersed transformers contain combustible insulating oil and therefore require proper fire safety precautions.

5. Moisture Resistance

1000kva 3 phase 11kv 440v dry type transformers are more sensitive to humid environments, as moisture absorption may reduce insulation performance. Fortunately,1000kva 3 phase 11kv 440v oil immersed transformers provide stronger moisture resistance because the insulating oil isolates internal components from atmospheric moisture.

6. Maintenance Requirements

1000kva 3 phase 11kv 440v dry type transformers require relatively simple maintenance, which mainly involves periodic cleaning of dust from the windings. However,1000kva 3 phase 11kv 440v oil immersed transformers require regular inspection of oil level, oil quality, and tank sealing conditions, along with periodic oil replacement or replenishment.

7. Capacity Range

Dry type transformers are mainly used for small and medium capacity applications, generally below 5000kVA. However, oil immersed transformers are suitable for larger capacity power systems, which ranges from 1000kVA to tens of thousands of kVA.

8. Cost Difference

1000kva 3 phase 11kv 440v dry type transformers usually have a higher initial purchase cost, especially epoxy resin cast models. 1000kva 3 phase 11kv 440v oil immersed transformers generally have lower initial investment costs but higher long term maintenance expenses.

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