How to Breathe New Life into Your Pad Mounted Transformer

A large green cabinet with a door on it, housing a pad mounted transformer

How to Breathe New Life into Your Pad Mounted Transformer

Pad mounted transformers play a crucial role in the distribution of electrical power, serving as vital components in various industries. Over time, these transformers may experience wear and tear, reducing their efficiency and potentially leading to unexpected failures. However, there’s good news! With proper reconditioning, you can breathe new life into your pad mounted transformer. This extends its lifespan and optimizes its performance. In this guide, we’ll explore the importance of reconditioning and provide actionable steps to revitalize your pad mounted transformer.

Why Reconditioning Matters:

Reconditioning your pad mounted transformer

Reconditioning your pad mounted transformer is a cost-effective and sustainable solution to ensure its longevity and efficiency. Regular maintenance can help prevent potential breakdowns, reducing the risk of downtime and associated financial losses. Additionally, reconditioning contributes to energy conservation and promotes a more environmentally friendly approach to transformer management. Read more on the positive environmental impact of reconditioning or rewinding transformers in our blog post: How Reconditioning Used Distribution Transformers Will Lower the Lead Times for All Transformers.

Key Steps to Reconditioning Your Pad Mounted Transformer:

Visual Inspection:

Conduct a thorough visual inspection of your pad mounted transformer to identify any visible signs of wear, corrosion, or damage. Look for leaks, rust, or loose connections. Addressing these issues in the early stages can prevent further damage and improve the transformer’s overall performance. Leaks will be fixed during this time as well.

Oil Replacement:

Transformer oil is a critical component for efficient operation. When a transformer is being operated it makes certain chemicals and gasses that contaminate the oil, it also breaks down overtime. This can cause problems for the pad mounted transformer. When we recondition units, the oil is replaced with either new mineral oil, or as an upgrade it is replaced with FR3. FR3 is a flame resistant and biodegradable fluid. It has a significantly longer lifespan for the insulation factor of transformer oil.

Bushings and Insulation:

Examine the bushings and insulation for signs of deterioration. Replace any damaged or worn-out components to ensure proper insulation and prevent potential electrical failures.


Gaskets in transformers are a wear item. With enough wear gaskets can leak the oil inside of pad mounted transformers. This can cause issues environmentally and with the reliability of your transformer. Without enough fluid the cooling can be compromised as well as the insulation between the coils and tank.

Cooling System Check:

Adequate cooling is crucial for preventing overheating. Clean or replace cooling fans, check the radiator for any blockages or leaks, and ensure the cooling system is functioning efficiently.


It’s common for paint on pad mounted transformers to become compromised from the elements. As well as scratches and dents from things hitting them. This also makes the transformer more susceptible to rust, which can make the tank completely unusable. So, during our recondition process we sand down the unit and give it a new coat of paint to further its lifespan.

paint on pad mounted transformers

Testing and Monitoring:

After all the reconditioning is done, we do final tests to ensure its condition as an electrically sound transformer. If the customer requests special tests they will also be done at this time.


Reconditioning your pad mounted transformer is a proactive and cost-effective approach to ensure its optimal performance and extend its operational life. Regular maintenance not only safeguards your investment but also contributes to a reliable and sustainable electrical distribution system.

By following these key steps and investing in the reconditioning process, you can breathe new life into your pad mounted transformer, enhancing its efficiency and reliability for years to come. Remember, a well-maintained transformer is the key to a resilient and efficient electrical infrastructure.