तेल में डूबे वितरण ट्रांसफार्मर की मुख्य विशेषताएं

तेल में डूबे वितरण ट्रांसफार्मर की मुख्य विशेषताएं

एकoil-immersed distribution transformer is a type of electrical transformer that uses insulating oil as both a coolant and dielectric medium. These transformers are widely used in power distribution networks to step down voltage levels (typically from 11kV/33kV to 415V/240V) for industrial, व्यावसायिक, and residential applications.

1. शीतलक& इन्सुलेशन

• Mineral oil or synthetic ester oil is used to dissipate heat and provide electrical insulation.

• The oil also prevents oxidation and moisture absorption, extending transformer life.

2. Construction

• मुख्य: Made of laminated silicon steel to reduce eddy current losses.

• घुमावदार: Copper or aluminum conductors (एचवी & LV windings).

• Tank: Sealed or conservator-type (with a breather to prevent moisture ingress).

• बुशिंग्स: Porcelain or polymer insulators for cable connections.

• Radiators/Fins: Enhance cooling by increasing surface area.

3. प्रकार

• Hermetically Sealed: Fully sealed to prevent oil oxidation (no conservator).

• Conservator-Type: Uses an oil expansion tank (conservator)       with a breather.

• ओनान (तेल प्राकृतिक वायु प्राकृतिक): Passive cooling (natural oil & air circulation).

• बंद (तेल प्राकृतिक वायु सेना): Fans are added for better cooling at higher loads.

4. लाभ

• Efficient heat dissipation, allowing higher load capacity.

• लंबी सेवा जीवन (20-30 years with proper maintenance).

• Reliable performance in varied environmental conditions.

• Lower initial cost compared to dry-type transformers.

5. नुकसान

• Fire risk due to flammable oil (requires fire safety measures).

• Regular maintenance needed (oil testing, leakage checks).

• Environmental concerns (oil disposal, potential spills).

6. अनुप्रयोग

• Power distribution networks (utility substations).

• Industrial plants, वाणिज्यिक भवन, and residential complexes.

• Renewable energy systems (solar/wind farms).

Maintenance Requirements

• Oil Testing: Check dielectric strength, moisture content, and acidity.

• Leak Inspection: Ensure no oil seepage from gaskets or welds.

• Bushing & Winding Checks: Detect insulation degradation.

• Sludge Removal: Prevent clogging in cooling ducts.

मानकों & प्रमाणपत्र

• आईईसी 60076 (International standards for power transformers).

• IEEE C57.12.00 (General requirements for liquid-immersed transformers).

• IS 1180 (Indian Standard for oil-immersed distribution transformers).

Comparison with Dry-Type Transformers

निष्कर्ष

Oil-immersed distribution transformers are cost-effective and efficient for medium-to-high power distribution but require careful handling due to oil-related risks. They remain the preferred choice for outdoor and high-load applications where cooling efficiency is critical.