Power Transformer Services

We specialize in comprehensive transformer services, ensuring your equipment is healthy, lasts a long time and stays powered. Backed by industry standards and technical expertise, our team is committed to delivering exceptional service and support.

Removal of moisture, gases and contaminants for enhanced oil quality and dielectric strength. Oil sampling for DGA analysis.

Commissioning and maintenance testing to detect potential failures early (standardized assessments under NETA/ATS/MTS).

Expert gasket repairs to seal and prevent leaks, and precision repair services to protect and extend transformer lifespan.

Expert setup for new transformers, ensuring safe, efficient operation from day one.

Your Dedicated Partner

Power transformers are the backbone of every industry that relies on safe, reliable energy — from utilities, refineries, and manufacturing facilities to mission-critical data centers and renewable generation sites like solar, hydro, and wind. No matter the environment, a transformer failure can mean costly downtime, safety risks, and compliance challenges. At 365 Transformer Services, we deliver the expertise, rapid response, and standards-driven maintenance programs that keep transformers performing at their best. Our certified technicians provide installation, testing, repairs, and oil processing designed to extend transformer life, reduce risk, and ensure continuous, compliant power across every sector we serve.

Our Service Areas

Our technicians provide on-site service in the following regions:

Northwest – Washington, Oregon, Idaho, Montana
Southwest – California, Nevada, Arizona, Utah, New Mexico, Colorado, Wyoming, Texas
Midwest – Nebraska, North Dakota, South Dakota, Kansas, Oklahoma

At 365 Transformer Services, we’re committed to being your long-term partner in compliance, safety, and reliability. Our comprehensive power transformer services help you extend transformer life, reduce risk and keep your plant running smoothly year after year.

We’ve built our company on four core tenets:

Safety Is Our Top Priority – If we can’t do something safely, we won’t do it.
Quality Over Quantity – Our goal is to bring the highest level of quality with all the services we provide.
We Prioritize Relationships – We don’t look at our clients as a number or a line on a spreadsheet. Our goal is to build long-lasting relationships with each client to provide the best possible service.
An Emphasis on Compliance – Or team is certified by OSHA 30, NEPA and IEEE Standards. We’re also a NETA accredited company (this certification is pending). All the work we perform adheres to the strict regulations and standards established by these agencies.

Serving a Wide Range of Industries

365 Transformer Services is equipped to meet the needs of a wide range of industries, including:

Electric/Power/Utility Companies
Refineries
Data Centers
Manufacturing
Solar Farms
Hydro Power
Wind Power

Electric/Power/Utility Companies

Transformers are the backbone of grid stability and generation reliability. A failure can trigger cascading downtime, compliance violations, and costly corrective measures. 365 Transformer Services provides rapid on-site response, root-cause diagnostics, and full-service maintenance, repair, and installation for medium- and high-voltage transformers. Our work is backed by IEEE, OSHA, and NETA standards to ensure reliable, compliant, and efficient system performance.

Learn More About Power Companies

Refineries

Refineries demand continuous power to maintain safe and efficient production. A transformer outage can halt throughput, increase operational risk, and jeopardize compliance. 365 Transformer Services delivers installation, corrective repair, oil processing, and standards-driven maintenance programs engineered to prevent unplanned outages and protect mission-critical infrastructure.

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Data Centers

Data centers operate under zero-tolerance conditions for downtime, making transformer reliability central to uptime guarantees. 365 Transformer Services provides installation, predictive testing, emergency response, and standards-based maintenance to safeguard continuous operations. Our technicians ensure each transformer is installed and serviced to precise specifications, minimizing risk to both infrastructure and service-level commitments.

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Manufacturing

Manufacturing facilities rely on consistent voltage stability to maintain production output, quality, and worker safety. When transformers fail, production halts. 365 Transformer Services provides turnkey installation, on-site testing, oil dielectric analysis, and preventive maintenance programs that extend transformer life, mitigate risk, and keep your operations running without interruption.

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Solar Farms

Transformers are critical for stepping up generated solar power and integrating it into the grid. A single failure reduces energy yield and undermines system ROI. 365 Transformer Services provides precision installation, periodic oil sampling and dielectric testing, and rapid field repairs that are aligned with renewable industry standards to keep generation assets performing at peak efficiency.

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Hydro Power

Hydroelectric facilities depend on high-capacity transformers to transmit generated energy reliably and safely. Equipment malfunctions risk reduced output and compliance exposure. 365 Transformer Services delivers installation, field testing, oil purification, and long-term preventive maintenance, ensuring hydro assets operate at full capacity and in line with IEEE and OSHA standards.

Learn More About Hydro Power

Wind Power

Wind turbines rely on transformers to step up voltage for efficient grid integration, often under high load and harsh environmental conditions. 365 Transformer Services reduces failure risk with precision installation, mobile emergency response, oil analysis, and compliance-based preventive maintenance programs engineered specifically for renewable generation environments.

Learn More About Wind Power

Find out how our comprehensive transformer services will help you extend transformer life, reduce risk and keep your facility running smoothly.

4 Warning Signs Your Transformer May Be Heading Toward Failure Power transformers are designed to operate reliably for decades. However, most transformer failures do not occur suddenly. In many cases, warning signs appear months or even years before a failure happens. Through proper monitoring and preventive maintenance, many of these issues can be detected early and corrected before serious damage occurs. Industry practices from organizations such as IEEE and diagnostic techniques taught by Doble Engineering Company emphasize the importance of monitoring transformer condition regularly.

Below are four common warning signs that a transformer may be developing serious problems.

1. Increasing Dissolved Gas Levels

One of the most powerful diagnostic tools in transformer maintenance is Dissolved Gas Analysis (DGA). When electrical faults, overheating, or insulation breakdown occurs inside a transformer, certain gases are produced and dissolve into the oil. Examples include:

hydrogen
methane
acetylene
thylene

Trending these gases over time helps engineers identify problems such as:

overheating of conductors
partial discharge
arcing faults

Rising gas levels are often one of the earliest indicators of internal transformer problems.

2. Increasing Moisture in the Oil

Moisture is one of the most damaging contaminants in transformer insulation systems. Even small increases in moisture can significantly reduce insulation strength and accelerate aging of the paper insulation surrounding the windings. Moisture may enter the transformer through:

leaking seals
aging insulation
atmospheric contamination
cooling system problems

Regular oil sampling and moisture analysis help detect these issues early.

3. Rising Operating Temperatures

Excessive temperature is one of the leading causes of transformer insulation aging. Transformers operate best when temperatures remain within design limits. Abnormally high temperatures may indicate:

overloaded transformers
cooling system failures
restricted oil circulation- internal insulation problems

Thermal monitoring and infrared inspections can help identify abnormal heating conditions before they cause permanent damage.

4. Changes in Electrical Test Results

Electrical diagnostic tests provide important information about transformer insulation health. Common tests include:

insulation resistance testing
power factor testing
transformer turns ratio (TTR)
winding resistance measurements

If these test results begin trending outside normal limits, it may indicate developing problems such as insulation degradation, winding damage, or tap changer issues. Routine electrical testing is a critical part of any transformer maintenance program. The Importance of Early Detection Transformers rarely fail without warning. In most cases, the signs appear gradually through oil analysis, temperature monitoring, and electrical testing. By identifying these warning signs early, asset owners can take corrective action before a minor issue becomes a major failure. Preventive maintenance programs help extend transformer life, improve reliability, and protect critical electrical infrastructure. Supporting Reliable Transformer Operation Proper monitoring, regular testing, and experienced technical support are essential to maintaining reliable transformer operation. At 365 Transformer Services, we provide specialized field services including:

These services help asset owners detect problems early and keep transformers operating safely for decades.

The Most Expensive Maintenance Strategy: Doing Nothing Why Preventive Maintenance Protects Your Transformer Investment Power transformers are among the most valuable assets in an electrical power system. Utility-scale transformers can cost hundreds of thousands to several million dollars, and replacement lead times often exceed 12-24 months. Despite this, many organizations delay or avoid preventive maintenance until problems appear. Unfortunately, doing nothing is often the most expensive strategy. Industry data and guidance from organizations such as IEEE and practices taught by Doble Engineering Company consistently show that preventive maintenance dramatically reduces transformer failures and extends equipment life.

Transformer Failures Are Extremely Expensive

When a large transformer fails, the costs extend far beyond replacing the equipment. Typical impacts can include:

$500,000 - $5,000,000 replacement cost for large transformers
12-24 months lead time for manufacturing a replacement unit
lost production or facility downtime
emergency installation and transportation costs

For industrial facilities and data centers, even a single day of downtime can cost tens of thousands to millions of dollars depending on the operation. Preventive maintenance programs help reduce the risk of these catastrophic failures.

Most Transformer Failures Are Preventable

According to several industry studies, over 60-70% of transformer failures are related to insulation deterioration, moisture contamination, or thermal stress. Many of these issues develop slowly and can be detected early through routine maintenance practices such as:

oil analysis
moisture monitoring
electrical diagnostic testing
thermal inspections

When problems are identified early, corrective actions can be taken before serious damage occurs.

The True Cost of Preventive Maintenance

Compared to transformer replacement costs, preventive maintenance is relatively small. Typical maintenance activities may include:

annual inspections
oil sampling and laboratory analysis
electrical testing such as insulation resistance and power factor
oil processing or filtration when needed

These services represent a small fraction of the cost of replacing a transformer or recovering from a major failure. Preventive maintenance is not an expense - it is protection for a critical asset.

Extending Transformer Life

Well-maintained transformers can operate reliably for 40 to 60 years or more. However, lack of maintenance can accelerate insulation aging and reduce the expected life of the transformer. Moisture, overheating, and contamination gradually damage the cellulose insulation system. Once this insulation deteriorates, repairs become extremely difficult and expensive. Routine monitoring allows operators to control these factors and extend equipment life.

Predictive Maintenance Is the Modern Approach

Today, many asset owners use condition-based maintenance strategies. This approach relies on diagnostic tools such as:

Dissolved Gas Analysis (DGA)
moisture analysis
electrical testing
thermal monitoring

These tools allow engineers to detect developing issues before they become failures. Industry guidance from IEEE emphasizes the importance of combining preventive maintenance with diagnostic testing to maintain transformer reliability.

The Bottom Line

Ignoring transformer maintenance does not save money - it increases risk. Preventive maintenance programs help:

extend transformer life
detect problems early
reduce costly failures
protect critical infrastructure

For organizations that rely on reliable electrical systems, preventive maintenance is not simply a maintenance cost. It is a long-term investment in reliability, safety, and asset protection.

Why Moisture in Transformer Oil Can Be Misleading Understanding Moisture Migration and Proper Oil Sampling Moisture is one of the most damaging contaminants in a power transformer. Even small amounts of water can significantly reduce insulation strength and accelerate the aging of cellulose insulation. However, many transformer owners are surprised to learn that oil moisture readings do not tell the full story of a transformer's insulation condition. According to industry guidance from Doble Engineering Company and IEEE, nearly 98-99% of the moisture inside a transformer is contained in the paper insulation, not in the oil itself.

Where Moisture Really Lives in a Transformer

A transformer insulation system is made of two main components:

Cellulose paper insulation surrounding the windings
Insulating oil, which provides cooling and dielectric strength

Cellulose paper acts like a sponge, absorbing and storing moisture over time. The oil, on the other hand, holds only a very small portion of the total moisture. Because of this relationship, the moisture measured in oil samples represents only a small indicator of the moisture contained in the insulation system. How Temperature Changes Moisture Readings Moisture constantly moves between the oil and paper insulation depending on temperature. When the transformer is energized As the transformer operates and the insulation warms, the paper releases moisture. Warm oil can dissolve more water, allowing moisture to migrate from the paper insulation into the oil. As a result, oil samples taken while the transformer is hot may show higher moisture readings. When the transformer cools down When a transformer is shut down and begins to cool, the oil loses its ability to hold moisture. This causes moisture to migrate from the oil back into the paper insulation, often lowering the moisture reading in oil samples. Because of this phenomenon, oil samples taken from a cold transformer may appear drier even though the paper insulation still contains significant moisture.

Why Proper Oil Sampling Is Critical

Because moisture readings are sensitive to temperature and contamination, proper sampling techniques are extremely important. Industry best practices published by IEEE and ASTM International recommend the following procedures. Sample under normal operating conditions Whenever possible, oil samples should be taken while the transformer is energized and at normal operating temperature. This allows moisture that has migrated from the insulation to appear in the oil sample, giving a more representative reading. Use clean and sealed sampling bottles Sampling containers must be clean, dry, and properly sealed to prevent contamination from ambient air or moisture. Flush the sampling valve Before collecting a sample, the sampling valve should be flushed to remove stagnant oil that may not represent the current condition of the transformer. Avoid air exposure Oil samples should be collected carefully to minimize contact with air, which can introduce moisture and oxygen into the sample. Label and handle samples properly Proper labeling, sealing, and timely shipment to the laboratory are essential to maintain sample integrity for testing such as:

moisture analysis
dissolved gas analysis (DGA)
dielectric strength testing

Why Moisture Monitoring Matters

Monitoring transformer oil moisture helps engineers:

estimate moisture levels in paper insulation
identify insulation aging
determine when oil processing or drying is required- prevent insulation breakdown and transformer failure

Even though oil contains only a small fraction of the total moisture in a transformer, oil analysis remains one of the most important tools for understanding insulation health.

Final Thoughts

Moisture migration between oil and paper insulation is a fundamental concept in transformer diagnostics. Understanding how temperature affects oil moisture readings - and following proper sampling practices allows engineers to interpret oil analysis results more accurately. Proper oil sampling, combined with expert interpretation, helps ensure transformers remain reliable and operate safely for decades.

How 365 Transformer Services Sets a Higher Standard In an industry where field work is often fast-paced, unpredictable, and physically demanding, professionalism can easily slip through the cracks. But at 365 Transformer Services, it never does. We've built our reputation on showing up prepared, polished, and fully committed to doing things the right way--every single time.

A Higher Standard in the Field

We've all seen job sites where crews show up with worn-out PPE, sloppy clothing, or equipment that looks like it hasn't been serviced in years. That's not who we are. Our team understands that the way you look, the way you carry yourself, and the way your equipment is maintained says everything about your company before a single word is spoken. We take pride in presenting ourselves professionally--from clean uniforms and proper PPE to well-maintained, modern equipment. Clients notice. They walk up, take photos of our setup, and often comment on how organized and dialed-in everything looks. That level of presentation builds trust before we even begin the work.

Transparency on the Job Site

One thing that sets us apart is our openness. When customers approach us with questions--What are you doing? Why are you doing it this way? What does this equipment do?--we don't brush them off or hide behind technical jargon. We take the time to explain. Many clients have owned their transformers for 20+ years, or they've worked in the industry for decades, but that doesn't always mean they understand the finer details of transformer maintenance, oil processing, or testing. And that's okay. That's where we come in. We believe education is part of the service. When a customer leaves the job site knowing more than when they arrived, that's a win for everyone.

Equipment That Reflects Our Values

Our equipment is an extension of our professionalism. We keep everything clean, organized, and fully operational. No leaks, no clutter, no shortcuts. When customers walk by and take pictures, we welcome it--because we're proud of what we bring to the field. We've seen the opposite too: outdated rigs, unsafe setups, and equipment that looks like it's barely hanging on. That's not acceptable for us. We believe that if you respect your tools and your environment, it shows in the quality of your work.

Small Team, Big Impact

We may be a smaller company, but that's exactly why we're so focused. We don't cut corners. We don't rush jobs. We don't compromise safety or quality. Every project gets our full attention, and every customer gets treated with respect. Our size allows us to stay agile, detail-oriented, and deeply connected to our clients. We're not just another contractor--we're a partner you can trust.

The 365 Difference

Professionalism isn't just about appearance. It's about attitude, communication, and consistency. It's about doing things the right way even when no one is watching. And it's about showing customers that their equipment--and their trust--are in good hands. At 365 Transformer Services, we're proud to set a higher standard in the field. And we'll continue raising the bar, one job site at a time

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