Delta Energy

Transformer Services

  • Testing: Regularly testing the transformer oil identifies potential problems early on. This includes tests for moisture content, insulating strength, acidity, and the presence of contaminants. 
  • Filtration: On-site transformer oil filtration removes impurities that degrade the oil quality that lead to overheating or breakdowns.
  • Dehydration: Removing moisture from the transformer oil is essential as it can cause electrical breakdowns
High voltage transformer

Transformer Maintenance

Electrical Maintenance:

• Testing: Various electrical tests assess the transformer's health, including turns ratio,winding resistance, and insulation resistance.

• On-Load Tap Changer Maintenance: Maintaining the on-load tap changer ensures propervoltage regulation.

Mechanical Maintenance:

  • Inspection: A thorough inspection check for leaks, rust, damage to the tank accessories, bushings, pressure valves, and cooling systems.
  • Repair: Addressing leaks promptly and replacing worn-out components like gaskets or bushings prevents further damage.

Additionally:

• Oil Sampling: Regular oil sampling allows for ongoing monitoring of the oil's condition.

• Cleaning: General cleaning helps maintain the transformer's cooling efficiency.

By implementing a comprehensive power transformer maintenance program, you can:

• Extend the life of your transformers

• Prevent costly outages

• Improve system reliability

• Enhance safety

 

Type tests of transformer include:

1. Winding resistance test of transformer

2. Transformer ratio test

3. Transformer vector group test

4. Measurement of impedance voltage/short circuit impedance (principal tap) and load loss (Short circuit test)

5. Measurement of no-load loss and current (Open circuit test)

6. Measurement of insulation resistance

7. Dielectric tests of transformer

8. Temperature rise test of transformer

9. Tests on on-load tap-changer

10. Vacuum tests on tank and radiators

Special Test of Transformers

1. Dielectric tests.

2. Measurement of zero-sequence impedance of three-phase transformers

3. Short-circuit test

4. Measurement of acoustic noise level

5. Measurement of the harmonics of the no-load current.

6. Measurement of the power taken by the fans and oil pumps.

7. Tests on bought out components / accessories such as buchhloz relay, temperature indicators, pressure relief devices, oil preservation system etc.

operator installs a transformer in an industrial plant in mechanical engineering

Routine tests of transformer include

1. Winding resistance test of transformer

2. Transformer ratio test

3. Transformer vector group test

4. Measurement of impedance voltage/short circuit impedance (principal tap) and load loss (Short circuit test)

5. Measurement of no-load loss and current (Open circuit test)

6. Measurement of insulation resistance

7. Dielectric tests of transformer.

8. Tests on on-load tap-changer.

9. Oil pressure test on transformer to check against leakages past joints and gaskets

engineer or electrician working on checking status step up transformer high voltage on transformer yard and solution problem to operate at green energy solar power plant