Transformer services

Transformer services from Siemens Energy Management

Financial impact following the outage of an 760 MVA GSU transformer

  • daily of lost profits

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Transformer services

Transforming service into reliability

Whether power transformers, reactors, transformers for industrial applications, phase-shifting transformers, or HVDC transformers – transformers are crucial for ensuring a trouble-free supply of power with no interruptions. As reliable, rugged key components, they are frequently in use for decades at a time – and are thus subject to the unavoidable effects of aging and wear.

Strategically increase value with TLM

How can you plan your expenditures in a targeted way and systematically control the timing of new investments? How can you avoid unforeseeable outages and minimize planned downtimes? And how can you reduce the impact on the environment while maximizing transformer availability? The answer to these questions is TLM™ – Transformer Lifecycle Management™ – the service concept from Siemens for all the transformers in your network, regardless of age, manufacturer, or power. We service all generations of transformers.

Our TLM service concept is designed to prevent unplanned downtimes and optimize planned maintenance measures. We’re aware that you have fewer and increasingly shorter windows of opportunity even for planned service interruptions. Our response is technologies and methods that are as mobile as our experts. From oil-drying systems to high-voltage testing stations, we provide mobile repair workshops to support you on-site. Mobile teams and technologies are elements that ideally complement the performance spectrum of Siemens’ repair facility – they’re fast, flexible, and can be integrated in your operations.


Highlight services for transformers

Transformers are the cornerstone of power generation, transmission, and distribution systems. Their outages or failures usually have far-reaching consequences on large parts of the power system.

We’ll get your transformers back in top form – and without service interruptions

The Siemens TLM™ method for extending service life minimizes the unavoidable, undetectable, and ongoing aging process that is taking place inside your transformers. Our stationary and continuous transformer drying system and moisture monitoring SITRAM® DRY as well as our mobile container-mounted solution SITRAM REG for the lasting regeneration of the transformer oil filling are internationally-recognized technologies, and round out our offerings for improving cooling efficiency sealing. These can easily be integrated as retrofit solutions. The regeneration of the oil filling in particular not only eliminates frequent oil changes, but also offers substantial economic and ecological advantages, as it is performed during normal operations.

Intelligent condition diagnostics for transformers

How is your fleet of transformers really doing? Siemens TLM diagnostics makes it possible to detect the current condition with high precision and therefore classify operational reliability for all makes and models and all voltage and power levels. Especially after extraordinary events such as thunderstorms and lightning, relocations, and similar occurrences, comprehensive testing including on-site high-voltage tests is recommended – and with TLM, this is possible with the high quality equivalent to testing in the factory. Mobile TLM high-voltage tests are also used for acceptance testing following on-site repairs.

Our modular diagnostics program for power transformers SITRAM DIAG consists of three levels of analysis and many additional stand-alone modules for the selection and examination of irregular transformers in ever greater detail. You can choose the level of diagnostics that best fits your needs: Essential Diagnostics is performed during your normal operations, while the Advanced Level requires minimum outages. The ultimate level integrates high-voltage testing to optimally evaluate the operational condition and residual life span of each of your power transformers, based on our decades of experiences and highly advanced diagnostic methods. 

Transforming knowledge into availability

Service overview

Services for your transformers throughout their entire lifecycle

Siemens TLM is based on the expertise available in all Siemens transformer factories, which are well-known for high quality and low failure rates. Our highly experienced transformer experts provide the most effective lifecycle solutions for power transformers of any age and any brand along the value chain from reactive to proactive services.
Test laboratory

Top class laboratory diagnostics for transformer materials

Do you know the chemical age of your transformer? Well we do! There are numerous complementary methods for diagnosing the transformer ageing process early and reliably. The Siemens Test Laboratory for Transformer Materials is completely focused on the laboratory diagnostics of oil-filled electrical equipment. The highly qualified personnel are constantly developing new methods for ageing diagnostics and are using this knowledge for the benefit of our customers.

100 years of know-how ensuring a long transformer life span

Siemens can look back at over 100 years of experience in the production and operation of transformers. During all these years we have developed numerous methods and parameters so that ageing processes can be diagnosed early and reliably. The life span of a transformer largely depends on the ageing of the solid and liquid organic insulating materials. In normal operating conditions, below the maximum permissible load, and with regular maintenance and care, a transformer's lifespan can be extended to well over 30 years.

Whether it is a case of new construction, operation, retrofit or repair, it is always a matter of reliably recognizing material degradation and rectifying it. For this purpose an extensive knowledge of the materials as well as a specific, precise analysis is fundamental. In order to avoid costly breakdowns, minimize downtimes and extend the lifespan of a transformer, the performance of a regular trend analysis and targeted maintenance are indispensable.

Downloads, support, services

One step ahead with information

Get to know more about our services for your transformers: We’ll gladly place our information material on our transformer services, training courses, newsletters, and more at your service.

Customer Support

Local training from a global network

Core and customized training courses in many training centers around the world or at your plant

Local training from a global network

Combining technology with financing to make your business stronger and more competitive 88/100


Transformer services in action

We successfully deliver fast, competent and reliable product support for all kinds of transformers wherever it’s needed.


We’re at your service

If you’d like to learn more about what we can do to keep your transformers fit for tomorrow’s energy demands and technological, economical, and safety-related requirements, please contact our Customer Support Center. Our experts look forward to answering all your questions about our transformer services, and we’ll be pleased to provide you with comprehensive information.

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